/*******************************************************************************
* Copyright (c) 2000, 2012 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.graphics;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.cairo.*;
import org.eclipse.swt.internal.motif.*;
import org.eclipse.swt.*;
/**
* Class <code>GC</code> is where all of the drawing capabilities that are
* supported by SWT are located. Instances are used to draw on either an
* <code>Image</code>, a <code>Control</code>, or directly on a <code>Display</code>.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>LEFT_TO_RIGHT, RIGHT_TO_LEFT</dd>
* </dl>
*
* <p>
* The SWT drawing coordinate system is the two-dimensional space with the origin
* (0,0) at the top left corner of the drawing area and with (x,y) values increasing
* to the right and downward respectively.
* </p>
*
* <p>
* The result of drawing on an image that was created with an indexed
* palette using a color that is not in the palette is platform specific.
* Some platforms will match to the nearest color while other will draw
* the color itself. This happens because the allocated image might use
* a direct palette on platforms that do not support indexed palette.
* </p>
*
* <p>
* Application code must explicitly invoke the <code>GC.dispose()</code>
* method to release the operating system resources managed by each instance
* when those instances are no longer required. This is <em>particularly</em>
* important on Windows95 and Windows98 where the operating system has a limited
* number of device contexts available.
* </p>
*
* <p>
* Note: Only one of LEFT_TO_RIGHT and RIGHT_TO_LEFT may be specified.
* </p>
*
* @see org.eclipse.swt.events.PaintEvent
* @see <a href="http://www.eclipse.org/swt/snippets/#gc">GC snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Examples: GraphicsExample, PaintExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*/
public final class GC extends Resource {
/**
* the handle to the OS device context
* (Warning: This field is platform dependent)
* <p>
* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
* </p>
*
* @noreference This field is not intended to be referenced by clients.
*/
public int handle;
Drawable drawable;
GCData data;
final static int FOREGROUND = 1 << 0;
final static int BACKGROUND = 1 << 1;
final static int FONT = 1 << 2;
final static int LINE_STYLE = 1 << 3;
final static int LINE_CAP = 1 << 4;
final static int LINE_JOIN = 1 << 5;
final static int LINE_WIDTH = 1 << 6;
final static int LINE_MITERLIMIT = 1 << 7;
final static int BACKGROUND_BG = 1 << 8;
final static int FOREGROUND_RGB = 1 << 9;
final static int BACKGROUND_RGB = 1 << 10;
final static int DRAW_OFFSET = 1 << 11;
final static int DRAW = FOREGROUND | LINE_WIDTH | LINE_STYLE | LINE_CAP | LINE_JOIN | LINE_MITERLIMIT | DRAW_OFFSET;
final static int FILL = BACKGROUND;
static final float[] LINE_DOT = new float[]{1, 1};
static final float[] LINE_DASH = new float[]{3, 1};
static final float[] LINE_DASHDOT = new float[]{3, 1, 1, 1};
static final float[] LINE_DASHDOTDOT = new float[]{3, 1, 1, 1, 1, 1};
static final float[] LINE_DOT_ZERO = new float[]{3, 3};
static final float[] LINE_DASH_ZERO = new float[]{18, 6};
static final float[] LINE_DASHDOT_ZERO = new float[]{9, 6, 3, 6};
static final float[] LINE_DASHDOTDOT_ZERO = new float[]{9, 3, 3, 3, 3, 3};
GC() {
}
/**
* Constructs a new instance of this class which has been
* configured to draw on the specified drawable. Sets the
* foreground color, background color and font in the GC
* to match those in the drawable.
* <p>
* You must dispose the graphics context when it is no longer required.
* </p>
* @param drawable the drawable to draw on
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the drawable is null</li>
* <li>ERROR_NULL_ARGUMENT - if there is no current device</li>
* <li>ERROR_INVALID_ARGUMENT
* - if the drawable is an image that is not a bitmap or an icon
* - if the drawable is an image or printer that is already selected
* into another graphics context</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
* <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
* </ul>
*/
public GC(Drawable drawable) {
this(drawable, 0);
}
/**
* Constructs a new instance of this class which has been
* configured to draw on the specified drawable. Sets the
* foreground color, background color and font in the GC
* to match those in the drawable.
* <p>
* You must dispose the graphics context when it is no longer required.
* </p>
*
* @param drawable the drawable to draw on
* @param style the style of GC to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the drawable is null</li>
* <li>ERROR_NULL_ARGUMENT - if there is no current device</li>
* <li>ERROR_INVALID_ARGUMENT
* - if the drawable is an image that is not a bitmap or an icon
* - if the drawable is an image or printer that is already selected
* into another graphics context</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
* <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
* </ul>
*
* @since 2.1.2
*/
public GC(Drawable drawable, int style) {
if (drawable == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
GCData data = new GCData();
data.style = checkStyle(style);
int xGC = drawable.internal_new_GC(data);
Device device = data.device;
if (device == null) device = Device.getDevice();
if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
this.device = data.device = device;
init(drawable, data, xGC);
init();
}
static void addCairoString(int cairo, String string, float x, float y, Font font) {
byte[] buffer = Converter.wcsToMbcs(null, string, true);
GC.setCairoFont(cairo, font);
cairo_font_extents_t extents = new cairo_font_extents_t();
Cairo.cairo_font_extents(cairo, extents);
double baseline = y + extents.ascent;
Cairo.cairo_move_to(cairo, x, baseline);
Cairo.cairo_text_path(cairo, buffer);
}
static int checkStyle (int style) {
if ((style & SWT.LEFT_TO_RIGHT) != 0) style &= ~SWT.RIGHT_TO_LEFT;
return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
}
void checkGC (int mask) {
int state = data.state;
if ((state & mask) == mask) return;
state = (state ^ mask) & mask;
data.state |= mask;
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
if ((state & (BACKGROUND | FOREGROUND)) != 0) {
XColor color;
Pattern pattern;
if ((state & FOREGROUND) != 0) {
color = data.foreground;
if ((data.state & FOREGROUND_RGB) == 0) {
OS.XQueryColor (data.display, data.colormap, color);
data.state |= FOREGROUND_RGB;
}
pattern = data.foregroundPattern;
data.state &= ~BACKGROUND;
} else {
color = data.background;
if ((data.state & BACKGROUND_RGB) == 0) {
OS.XQueryColor (data.display, data.colormap, color);
data.state |= BACKGROUND_RGB;
}
pattern = data.backgroundPattern;
data.state &= ~FOREGROUND;
}
if (pattern != null) {
Cairo.cairo_set_source(cairo, pattern.handle);
} else {
Cairo.cairo_set_source_rgba(cairo, (color.red & 0xFFFF) / (float)0xFFFF, (color.green & 0xFFFF) / (float)0xFFFF, (color.blue & 0xFFFF) / (float)0xFFFF, data.alpha / (float)0xFF);
}
}
if ((state & FONT) != 0) {
setCairoFont(cairo, data.font);
}
if ((state & LINE_CAP) != 0) {
int cap_style = 0;
switch (data.lineCap) {
case SWT.CAP_ROUND: cap_style = Cairo.CAIRO_LINE_CAP_ROUND; break;
case SWT.CAP_FLAT: cap_style = Cairo.CAIRO_LINE_CAP_BUTT; break;
case SWT.CAP_SQUARE: cap_style = Cairo.CAIRO_LINE_CAP_SQUARE; break;
}
Cairo.cairo_set_line_cap(cairo, cap_style);
}
if ((state & LINE_JOIN) != 0) {
int join_style = 0;
switch (data.lineJoin) {
case SWT.JOIN_MITER: join_style = Cairo.CAIRO_LINE_JOIN_MITER; break;
case SWT.JOIN_ROUND: join_style = Cairo.CAIRO_LINE_JOIN_ROUND; break;
case SWT.JOIN_BEVEL: join_style = Cairo.CAIRO_LINE_JOIN_BEVEL; break;
}
Cairo.cairo_set_line_join(cairo, join_style);
}
if ((state & LINE_WIDTH) != 0) {
Cairo.cairo_set_line_width(cairo, data.lineWidth == 0 ? 1 : data.lineWidth);
switch (data.lineStyle) {
case SWT.LINE_DOT:
case SWT.LINE_DASH:
case SWT.LINE_DASHDOT:
case SWT.LINE_DASHDOTDOT:
state |= LINE_STYLE;
}
}
if ((state & LINE_STYLE) != 0) {
float dashesOffset = 0;
float[] dashes = null;
float width = data.lineWidth;
switch (data.lineStyle) {
case SWT.LINE_SOLID: break;
case SWT.LINE_DASH: dashes = width != 0 ? LINE_DASH : LINE_DASH_ZERO; break;
case SWT.LINE_DOT: dashes = width != 0 ? LINE_DOT : LINE_DOT_ZERO; break;
case SWT.LINE_DASHDOT: dashes = width != 0 ? LINE_DASHDOT : LINE_DASHDOT_ZERO; break;
case SWT.LINE_DASHDOTDOT: dashes = width != 0 ? LINE_DASHDOTDOT : LINE_DASHDOTDOT_ZERO; break;
case SWT.LINE_CUSTOM: dashes = data.lineDashes; break;
}
if (dashes != null) {
dashesOffset = data.lineDashesOffset;
double[] cairoDashes = new double[dashes.length];
for (int i = 0; i < cairoDashes.length; i++) {
cairoDashes[i] = width == 0 || data.lineStyle == SWT.LINE_CUSTOM ? dashes[i] : dashes[i] * width;
}
Cairo.cairo_set_dash(cairo, cairoDashes, cairoDashes.length, dashesOffset);
} else {
Cairo.cairo_set_dash(cairo, null, 0, 0);
}
}
if ((state & LINE_MITERLIMIT) != 0) {
Cairo.cairo_set_miter_limit(cairo, data.lineMiterLimit);
}
if ((state & DRAW_OFFSET) != 0) {
data.cairoXoffset = data.cairoYoffset = 0;
double[] matrix = new double[6];
Cairo.cairo_get_matrix(cairo, matrix);
double[] dx = new double[]{1};
double[] dy = new double[]{1};
Cairo.cairo_user_to_device_distance(cairo, dx, dy);
double scaling = dx[0];
if (scaling < 0) scaling = -scaling;
double strokeWidth = data.lineWidth * scaling;
if (strokeWidth == 0 || ((int)strokeWidth % 2) == 1) {
data.cairoXoffset = 0.5 / scaling;
}
scaling = dy[0];
if (scaling < 0) scaling = -scaling;
strokeWidth = data.lineWidth * scaling;
if (strokeWidth == 0 || ((int)strokeWidth % 2) == 1) {
data.cairoYoffset = 0.5 / scaling;
}
}
return;
}
int xDisplay = data.display;
if ((state & (BACKGROUND | FOREGROUND)) != 0) {
XColor foreground;
if ((state & FOREGROUND) != 0) {
foreground = data.foreground;
data.state &= ~BACKGROUND;
} else {
foreground = data.background;
data.state &= ~FOREGROUND;
}
OS.XSetForeground (xDisplay, handle, foreground.pixel);
}
if ((state & BACKGROUND_BG) != 0) {
XColor background = data.background;
OS.XSetBackground(xDisplay, handle, background.pixel);
}
if ((state & (LINE_CAP | LINE_JOIN | LINE_STYLE | LINE_WIDTH)) != 0) {
int cap_style = 0;
int join_style = 0;
int width = (int)data.lineWidth;
int line_style = 0;
float[] dashes = null;
switch (data.lineCap) {
case SWT.CAP_ROUND: cap_style = OS.CapRound; break;
case SWT.CAP_FLAT: cap_style = OS.CapButt; break;
case SWT.CAP_SQUARE: cap_style = OS.CapProjecting; break;
}
switch (data.lineJoin) {
case SWT.JOIN_ROUND: join_style = OS.JoinRound; break;
case SWT.JOIN_MITER: join_style = OS.JoinMiter; break;
case SWT.JOIN_BEVEL: join_style = OS.JoinBevel; break;
}
switch (data.lineStyle) {
case SWT.LINE_SOLID: break;
case SWT.LINE_DASH: dashes = width != 0 ? LINE_DASH : LINE_DASH_ZERO; break;
case SWT.LINE_DOT: dashes = width != 0 ? LINE_DOT : LINE_DOT_ZERO; break;
case SWT.LINE_DASHDOT: dashes = width != 0 ? LINE_DASHDOT : LINE_DASHDOT_ZERO; break;
case SWT.LINE_DASHDOTDOT: dashes = width != 0 ? LINE_DASHDOTDOT : LINE_DASHDOTDOT_ZERO; break;
case SWT.LINE_CUSTOM: dashes = data.lineDashes; break;
}
if (dashes != null) {
if ((state & LINE_STYLE) != 0) {
byte[] dash_list = new byte[dashes.length];
for (int i = 0; i < dash_list.length; i++) {
dash_list[i] = (byte)(width == 0 || data.lineStyle == SWT.LINE_CUSTOM ? dashes[i] : dashes[i] * width);
}
OS.XSetDashes(xDisplay, handle, 0, dash_list, dash_list.length);
}
line_style = OS.LineOnOffDash;
} else {
line_style = OS.LineSolid;
}
OS.XSetLineAttributes(xDisplay, handle, width, line_style, cap_style, join_style);
}
}
int convertRgn(int rgn, double[] matrix) {
long /*int*/ newRgn = OS.XCreateRegion();
//TODO - get rectangles from region instead of clip box
XRectangle rect = new XRectangle();
OS.XClipBox(rgn, rect);
short[] pointArray = new short[8];
double[] x = new double[1], y = new double[1];
x[0] = rect.x;
y[0] = rect.y;
Cairo.cairo_matrix_transform_point(matrix, x, y);
pointArray[0] = (short)x[0];
pointArray[1] = (short)y[0];
x[0] = rect.x + rect.width;
y[0] = rect.y;
Cairo.cairo_matrix_transform_point(matrix, x, y);
pointArray[2] = (short)Math.round(x[0]);
pointArray[3] = (short)y[0];
x[0] = rect.x + rect.width;
y[0] = rect.y + rect.height;
Cairo.cairo_matrix_transform_point(matrix, x, y);
pointArray[4] = (short)Math.round(x[0]);
pointArray[5] = (short)Math.round(y[0]);
x[0] = rect.x;
y[0] = rect.y + rect.height;
Cairo.cairo_matrix_transform_point(matrix, x, y);
pointArray[6] = (short)x[0];
pointArray[7] = (short)Math.round(y[0]);
long /*int*/ polyRgn = OS.XPolygonRegion(pointArray, pointArray.length / 2, OS.EvenOddRule);
OS.XUnionRegion(newRgn, polyRgn, newRgn);
OS.XDestroyRegion(polyRgn);
return newRgn;
}
/**
* Copies a rectangular area of the receiver at the source
* position onto the receiver at the destination position.
*
* @param srcX the x coordinate in the receiver of the area to be copied
* @param srcY the y coordinate in the receiver of the area to be copied
* @param width the width of the area to copy
* @param height the height of the area to copy
* @param destX the x coordinate in the receiver of the area to copy to
* @param destY the y coordinate in the receiver of the area to copy to
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void copyArea(int x, int y, int width, int height, int destX, int destY) {
copyArea(x, y, width, height, destX, destY, true);
}
/**
* Copies a rectangular area of the receiver at the source
* position onto the receiver at the destination position.
*
* @param srcX the x coordinate in the receiver of the area to be copied
* @param srcY the y coordinate in the receiver of the area to be copied
* @param width the width of the area to copy
* @param height the height of the area to copy
* @param destX the x coordinate in the receiver of the area to copy to
* @param destY the y coordinate in the receiver of the area to copy to
* @param paint if <code>true</code> paint events will be generated for old and obscured areas
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public void copyArea(int x, int y, int width, int height, int destX, int destY, boolean paint) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (width <= 0 || height <= 0) return;
int deltaX = destX - x, deltaY = destY - y;
if (deltaX == 0 && deltaY == 0) return;
int xDisplay = data.display;
int xDrawable = data.drawable;
if (data.backgroundImage != null && paint) {
OS.XClearArea (xDisplay, xDrawable, x, y, width, height, true);
OS.XClearArea (xDisplay, xDrawable, destX, destY, width, height, true);
return;
}
if (data.image == null && paint) OS.XSetGraphicsExposures (xDisplay, handle, true);
OS.XCopyArea(xDisplay, xDrawable, xDrawable, handle, x, y, width, height, destX, destY);
if (data.image == null && paint) {
OS.XSetGraphicsExposures (xDisplay, handle, false);
boolean disjoint = (destX + width < x) || (x + width < destX) || (destY + height < y) || (y + height < destY);
if (disjoint) {
OS.XClearArea (xDisplay, xDrawable, x, y, width, height, true);
} else {
if (deltaX != 0) {
int newX = destX - deltaX;
if (deltaX < 0) newX = destX + width;
OS.XClearArea (xDisplay, xDrawable, newX, y, Math.abs (deltaX), height, true);
}
if (deltaY != 0) {
int newY = destY - deltaY;
if (deltaY < 0) newY = destY + height;
OS.XClearArea (xDisplay, xDrawable, x, newY, width, Math.abs (deltaY), true);
}
}
}
}
/**
* Copies a rectangular area of the receiver at the specified
* position into the image, which must be of type <code>SWT.BITMAP</code>.
*
* @param image the image to copy into
* @param x the x coordinate in the receiver of the area to be copied
* @param y the y coordinate in the receiver of the area to be copied
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the image is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the image is not a bitmap or has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void copyArea(Image image, int x, int y) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (image.type != SWT.BITMAP || image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
Rectangle rect = image.getBounds();
int xDisplay = data.display;
int xGC = OS.XCreateGC(xDisplay, image.pixmap, 0, null);
if (xGC == 0) SWT.error(SWT.ERROR_NO_HANDLES);
OS.XSetSubwindowMode (xDisplay, xGC, OS.IncludeInferiors);
OS.XCopyArea(xDisplay, data.drawable, image.pixmap, xGC, x, y, rect.width, rect.height, 0, 0);
OS.XFreeGC(xDisplay, xGC);
}
void destroy() {
long /*int*/ cairo = data.cairo;
if (cairo != 0) Cairo.cairo_destroy(cairo);
data.cairo = 0;
/* Free resources */
int clipRgn = data.clipRgn;
if (clipRgn != 0) OS.XDestroyRegion(clipRgn);
Image image = data.image;
if (image != null) {
image.memGC = null;
if (image.transparentPixel != -1) image.createMask();
}
int renderTable = data.renderTable;
if (renderTable != 0) OS.XmRenderTableFree(renderTable);
int xmString = data.xmString;
if (xmString != 0) OS.XmStringFree (xmString);
int xmText = data.xmText;
if (xmText != 0) OS.XmStringFree (xmText);
int xmMnemonic = data.xmMnemonic;
if (xmMnemonic != 0) OS.XmStringFree (xmMnemonic);
/* Dispose the GC */
if (drawable != null) drawable.internal_dispose_GC(handle, data);
data.display = data.drawable = data.colormap =
data.clipRgn = data.renderTable = data.xmString = data.xmText =
data.xmMnemonic = 0;
data.font = null;
drawable = null;
handle = 0;
data.image = null;
data = null;
}
/**
* Draws the outline of a circular or elliptical arc
* within the specified rectangular area.
* <p>
* The resulting arc begins at <code>startAngle</code> and extends
* for <code>arcAngle</code> degrees, using the current color.
* Angles are interpreted such that 0 degrees is at the 3 o'clock
* position. A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
* </p><p>
* The center of the arc is the center of the rectangle whose origin
* is (<code>x</code>, <code>y</code>) and whose size is specified by the
* <code>width</code> and <code>height</code> arguments.
* </p><p>
* The resulting arc covers an area <code>width + 1</code> pixels wide
* by <code>height + 1</code> pixels tall.
* </p>
*
* @param x the x coordinate of the upper-left corner of the arc to be drawn
* @param y the y coordinate of the upper-left corner of the arc to be drawn
* @param width the width of the arc to be drawn
* @param height the height of the arc to be drawn
* @param startAngle the beginning angle
* @param arcAngle the angular extent of the arc, relative to the start angle
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(DRAW);
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
if (width == 0 || height == 0 || arcAngle == 0) return;
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
if (width == height) {
if (arcAngle >= 0) {
Cairo.cairo_arc_negative(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
} else {
Cairo.cairo_arc(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
}
} else {
Cairo.cairo_save(cairo);
Cairo.cairo_translate(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f);
Cairo.cairo_scale(cairo, width / 2f, height / 2f);
if (arcAngle >= 0) {
Cairo.cairo_arc_negative(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
} else {
Cairo.cairo_arc(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
}
Cairo.cairo_restore(cairo);
}
Cairo.cairo_stroke(cairo);
return;
}
OS.XDrawArc(data.display, data.drawable, handle, x, y, width, height, startAngle * 64, arcAngle * 64);
}
/**
* Draws a rectangle, based on the specified arguments, which has
* the appearance of the platform's <em>focus rectangle</em> if the
* platform supports such a notion, and otherwise draws a simple
* rectangle in the receiver's foreground color.
*
* @param x the x coordinate of the rectangle
* @param y the y coordinate of the rectangle
* @param width the width of the rectangle
* @param height the height of the rectangle
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawRectangle(int, int, int, int)
*/
public void drawFocus (int x, int y, int width, int height) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
/*
* When the drawable is not a widget, the highlight
* color is zero.
*/
int xDisplay = data.display;
int xDrawable = data.drawable;
int highlightColor = 0;
int widget = OS.XtWindowToWidget (xDisplay, xDrawable);
if (widget != 0) {
int [] argList = {OS.XmNhighlightColor, 0};
OS.XtGetValues (widget, argList, argList.length / 2);
highlightColor = argList [1];
}
/* Draw the focus rectangle */
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
int cairo = data.cairo;
if (cairo != 0) {
int lineWidth = 1;
Cairo.cairo_save(cairo);
Cairo.cairo_set_line_width(cairo, lineWidth);
XColor color = new XColor();
color.pixel = highlightColor;
OS.XQueryColor (data.display, data.colormap, color);
Cairo.cairo_set_source_rgba(cairo, (color.red & 0xFFFF) / (float)0xFFFF, (color.green & 0xFFFF) / (float)0xFFFF, (color.blue & 0xFFFF) / (float)0xFFFF, 1);
Cairo.cairo_rectangle(cairo, x + lineWidth / 2f, y + lineWidth / 2f, width, height);
Cairo.cairo_stroke(cairo);
Cairo.cairo_restore(cairo);
return;
}
OS.XSetForeground (xDisplay, handle, highlightColor);
OS.XDrawRectangle (xDisplay, xDrawable, handle, x, y, width - 1, height - 1);
data.state &= ~(BACKGROUND | FOREGROUND);
}
/**
* Draws the given image in the receiver at the specified
* coordinates.
*
* @param image the image to draw
* @param x the x coordinate of where to draw
* @param y the y coordinate of where to draw
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the image is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* <li>ERROR_INVALID_ARGUMENT - if the given coordinates are outside the bounds of the image</li>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li>
* </ul>
*/
public void drawImage(Image image, int x, int y) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
drawImage(image, 0, 0, -1, -1, x, y, -1, -1, true);
}
/**
* Copies a rectangular area from the source image into a (potentially
* different sized) rectangular area in the receiver. If the source
* and destination areas are of differing sizes, then the source
* area will be stretched or shrunk to fit the destination area
* as it is copied. The copy fails if any part of the source rectangle
* lies outside the bounds of the source image, or if any of the width
* or height arguments are negative.
*
* @param image the source image
* @param srcX the x coordinate in the source image to copy from
* @param srcY the y coordinate in the source image to copy from
* @param srcWidth the width in pixels to copy from the source
* @param srcHeight the height in pixels to copy from the source
* @param destX the x coordinate in the destination to copy to
* @param destY the y coordinate in the destination to copy to
* @param destWidth the width in pixels of the destination rectangle
* @param destHeight the height in pixels of the destination rectangle
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the image is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* <li>ERROR_INVALID_ARGUMENT - if any of the width or height arguments are negative.
* <li>ERROR_INVALID_ARGUMENT - if the source rectangle is not contained within the bounds of the source image</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
* @exception SWTError <ul>
* <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li>
* </ul>
*/
public void drawImage(Image image, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (srcWidth == 0 || srcHeight == 0 || destWidth == 0 || destHeight == 0) return;
if (srcX < 0 || srcY < 0 || srcWidth < 0 || srcHeight < 0 || destWidth < 0 || destHeight < 0) {
SWT.error (SWT.ERROR_INVALID_ARGUMENT);
}
if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
drawImage(image, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false);
}
void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple) {
int[] width = new int[1];
int[] height = new int[1];
int[] depth = new int[1];
int[] unused = new int[1];
OS.XGetGeometry(data.display, srcImage.pixmap, unused, unused, unused, width, height, unused, depth);
int imgWidth = width[0];
int imgHeight = height[0];
if (simple) {
srcWidth = destWidth = imgWidth;
srcHeight = destHeight = imgHeight;
} else {
simple = srcX == 0 && srcY == 0 &&
srcWidth == destWidth && destWidth == imgWidth &&
srcHeight == destHeight && destHeight == imgHeight;
if (srcX + srcWidth > imgWidth || srcY + srcHeight > imgHeight) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
}
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
if (data.alpha != 0) {
srcImage.createSurface();
Cairo.cairo_save(cairo);
Cairo.cairo_rectangle(cairo, destX , destY, destWidth, destHeight);
Cairo.cairo_clip(cairo);
Cairo.cairo_translate(cairo, destX - srcX, destY - srcY);
if (srcWidth != destWidth || srcHeight != destHeight) {
Cairo.cairo_scale(cairo, destWidth / (float)srcWidth, destHeight / (float)srcHeight);
}
int filter = Cairo.CAIRO_FILTER_GOOD;
switch (data.interpolation) {
case SWT.DEFAULT: filter = Cairo.CAIRO_FILTER_GOOD; break;
case SWT.NONE: filter = Cairo.CAIRO_FILTER_NEAREST; break;
case SWT.LOW: filter = Cairo.CAIRO_FILTER_FAST; break;
case SWT.HIGH: filter = Cairo.CAIRO_FILTER_BEST; break;
}
long /*int*/ pattern = Cairo.cairo_pattern_create_for_surface(srcImage.surface);
if (pattern == 0) SWT.error(SWT.ERROR_NO_HANDLES);
if (srcWidth != destWidth || srcHeight != destHeight) {
/*
* Bug in Cairo. When drawing the image streched with an interpolation
* alghorithm, the edges of the image are faded. This is not a bug, but
* it is not desired. To avoid the faded edges, it should be possible to
* use cairo_pattern_set_extend() to set the pattern extend to either
* CAIRO_EXTEND_REFLECT or CAIRO_EXTEND_PAD, but these are not implemented
* in some versions of cairo (1.2.x) and have bugs in others (in 1.4.2 it
* draws with black edges). The fix is to implement CAIRO_EXTEND_REFLECT
* by creating an image that is 3 times bigger than the original, drawing
* the original image in every quadrant (with an appropriate transform) and
* use this image as the pattern.
*
* NOTE: For some reaons, it is necessary to use CAIRO_EXTEND_PAD with
* the image that was created or the edges are still faded.
*/
if (Cairo.cairo_version () >= Cairo.CAIRO_VERSION_ENCODE(1, 4, 2)) {
long /*int*/ surface = Cairo.cairo_image_surface_create(Cairo.CAIRO_FORMAT_ARGB32, imgWidth * 3, imgHeight * 3);
long /*int*/ cr = Cairo.cairo_create(surface);
Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, imgHeight);
Cairo.cairo_paint(cr);
Cairo.cairo_scale(cr, -1, -1);
Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, -imgHeight);
Cairo.cairo_paint(cr);
Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, -imgHeight);
Cairo.cairo_paint(cr);
Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, -imgHeight * 3);
Cairo.cairo_paint(cr);
Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, -imgHeight * 3);
Cairo.cairo_paint(cr);
Cairo.cairo_scale(cr, 1, -1);
Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, imgHeight);
Cairo.cairo_paint(cr);
Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, imgHeight);
Cairo.cairo_paint(cr);
Cairo.cairo_scale(cr, -1, -1);
Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, -imgHeight);
Cairo.cairo_paint(cr);
Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, -imgHeight * 3);
Cairo.cairo_paint(cr);
Cairo.cairo_destroy(cr);
long /*int*/ newPattern = Cairo.cairo_pattern_create_for_surface(surface);
Cairo.cairo_surface_destroy(surface);
if (newPattern == 0) SWT.error(SWT.ERROR_NO_HANDLES);
Cairo.cairo_pattern_destroy(pattern);
pattern = newPattern;
Cairo.cairo_pattern_set_extend(pattern, Cairo.CAIRO_EXTEND_PAD);
double[] matrix = new double[6];
Cairo.cairo_matrix_init_translate(matrix, imgWidth, imgHeight);
Cairo.cairo_pattern_set_matrix(pattern, matrix);
}
// Cairo.cairo_pattern_set_extend(pattern, Cairo.CAIRO_EXTEND_REFLECT);
}
Cairo.cairo_pattern_set_filter(pattern, filter);
Cairo.cairo_set_source(cairo, pattern);
if (data.alpha != 0xFF) {
Cairo.cairo_paint_with_alpha(cairo, data.alpha / (float)0xFF);
} else {
Cairo.cairo_paint(cairo);
}
Cairo.cairo_restore(cairo);
Cairo.cairo_pattern_destroy(pattern);
}
return;
}
if (srcImage.alpha != -1 || srcImage.alphaData != null) {
drawImageAlpha(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth[0]);
} else if (srcImage.transparentPixel != -1 || srcImage.mask != 0) {
drawImageMask(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth[0]);
} else {
drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth[0]);
}
}
void drawImageAlpha(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int depth) {
/* Simple cases */
if (srcImage.alpha == 0) return;
if (srcImage.alpha == 255) {
drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth);
return;
}
if (device.useXRender) {
drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, srcImage.mask, OS.PictStandardA8);
return;
}
/* Check the clipping */
Rectangle rect = getClipping();
rect = rect.intersection(new Rectangle(destX, destY, destWidth, destHeight));
if (rect.isEmpty()) return;
/* Optimization. Recalculate the src and dest rectangles so that
* only the clipping area is drawn.
*/
int sx1 = srcX + (((rect.x - destX) * srcWidth) / destWidth);
int sx2 = srcX + ((((rect.x + rect.width) - destX) * srcWidth) / destWidth);
int sy1 = srcY + (((rect.y - destY) * srcHeight) / destHeight);
int sy2 = srcY + ((((rect.y + rect.height) - destY) * srcHeight) / destHeight);
destX = rect.x;
destY = rect.y;
destWidth = rect.width;
destHeight = rect.height;
srcX = sx1;
srcY = sy1;
srcWidth = Math.max(1, sx2 - sx1);
srcHeight = Math.max(1, sy2 - sy1);
int xDisplay = data.display;
int xDrawable = data.drawable;
int xDestImagePtr = 0, xSrcImagePtr = 0;
try {
/* Get the background pixels */
xDestImagePtr = OS.XGetImage(xDisplay, xDrawable, destX, destY, destWidth, destHeight, OS.AllPlanes, OS.ZPixmap);
if (xDestImagePtr == 0) return;
XImage xDestImage = new XImage();
OS.memmove(xDestImage, xDestImagePtr, XImage.sizeof);
byte[] destData = new byte[xDestImage.bytes_per_line * xDestImage.height];
OS.memmove(destData, xDestImage.data, destData.length);
/* Get the foreground pixels */
xSrcImagePtr = OS.XGetImage(xDisplay, srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, OS.AllPlanes, OS.ZPixmap);
if (xSrcImagePtr == 0) return;
XImage xSrcImage = new XImage();
OS.memmove(xSrcImage, xSrcImagePtr, XImage.sizeof);
byte[] srcData = new byte[xSrcImage.bytes_per_line * xSrcImage.height];
OS.memmove(srcData, xSrcImage.data, srcData.length);
/* Compose the pixels */
if (xSrcImage.depth <= 8) {
XColor[] xcolors = data.device.xcolors;
if (xcolors == null) SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
byte[] reds = new byte[xcolors.length];
byte[] greens = new byte[xcolors.length];
byte[] blues = new byte[xcolors.length];
for (int i = 0; i < xcolors.length; i++) {
XColor color = xcolors[i];
if (color == null) continue;
reds[i] = (byte)((color.red >> 8) & 0xFF);
greens[i] = (byte)((color.green >> 8) & 0xFF);
blues[i] = (byte)((color.blue >> 8) & 0xFF);
}
ImageData.blit(ImageData.BLIT_ALPHA,
srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, xSrcImage.byte_order, 0, 0, srcWidth, srcHeight, reds, greens, blues,
srcImage.alpha, srcImage.alphaData, imgWidth, srcX, srcY,
destData, xDestImage.bits_per_pixel, xDestImage.bytes_per_line, xDestImage.byte_order, 0, 0, destWidth, destHeight, reds, greens, blues,
false, false);
} else {
int srcRedMask = xSrcImage.red_mask;
int srcGreenMask = xSrcImage.green_mask;
int srcBlueMask = xSrcImage.blue_mask;
int destRedMask = xDestImage.red_mask;
int destGreenMask = xDestImage.green_mask;
int destBlueMask = xDestImage.blue_mask;
/*
* Feature in X. XGetImage does not retrieve the RGB masks if the drawable
* is a Pixmap. The fix is to detect that the masks are not valid and use
* the default visual masks instead.
*
* NOTE: It is safe to use the default Visual masks, since we always
* create images with these masks.
*/
int visual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay));
Visual xVisual = new Visual();
OS.memmove(xVisual, visual, Visual.sizeof);
if (srcRedMask == 0 && srcGreenMask == 0 && srcBlueMask == 0) {
srcRedMask = xVisual.red_mask;
srcGreenMask = xVisual.green_mask;
srcBlueMask = xVisual.blue_mask;
}
if (destRedMask == 0 && destGreenMask == 0 && destBlueMask == 0) {
destRedMask = xVisual.red_mask;
destGreenMask = xVisual.green_mask;
destBlueMask = xVisual.blue_mask;
}
ImageData.blit(ImageData.BLIT_ALPHA,
srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, xSrcImage.byte_order, 0, 0, srcWidth, srcHeight, srcRedMask, srcGreenMask, srcBlueMask,
srcImage.alpha, srcImage.alphaData, imgWidth, srcX, srcY,
destData, xDestImage.bits_per_pixel, xDestImage.bytes_per_line, xDestImage.byte_order, 0, 0, destWidth, destHeight, destRedMask, destGreenMask, destBlueMask,
false, false);
}
/* Draw the composed pixels */
OS.memmove(xDestImage.data, destData, destData.length);
OS.XPutImage(xDisplay, xDrawable, handle, xDestImagePtr, 0, 0, destX, destY, destWidth, destHeight);
} finally {
if (xSrcImagePtr != 0) OS.XDestroyImage(xSrcImagePtr);
if (xDestImagePtr != 0) OS.XDestroyImage(xDestImagePtr);
}
}
void drawImageMask(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int depth) {
int xDisplay = data.display;
int xDrawable = data.drawable;
/* Generate the mask if necessary. */
if (srcImage.transparentPixel != -1) srcImage.createMask();
if (device.useXRender) {
drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, srcImage.mask, OS.PictStandardA1);
} else {
int colorPixmap = 0, maskPixmap = 0;
int foreground = 0x00000000;
if (simple || (srcWidth == destWidth && srcHeight == destHeight)) {
colorPixmap = srcImage.pixmap;
maskPixmap = srcImage.mask;
} else {
/* Stretch the color and mask*/
int xImagePtr = scalePixmap(xDisplay, srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false, false);
if (xImagePtr != 0) {
int xMaskPtr = scalePixmap(xDisplay, srcImage.mask, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false, false);
if (xMaskPtr != 0) {
/* Create color scaled pixmaps */
colorPixmap = OS.XCreatePixmap(xDisplay, xDrawable, destWidth, destHeight, depth);
int tempGC = OS.XCreateGC(xDisplay, colorPixmap, 0, null);
OS.XPutImage(xDisplay, colorPixmap, tempGC, xImagePtr, 0, 0, 0, 0, destWidth, destHeight);
OS.XFreeGC(xDisplay, tempGC);
/* Create mask scaled pixmaps */
maskPixmap = OS.XCreatePixmap(xDisplay, xDrawable, destWidth, destHeight, 1);
tempGC = OS.XCreateGC(xDisplay, maskPixmap, 0, null);
OS.XPutImage(xDisplay, maskPixmap, tempGC, xMaskPtr, 0, 0, 0, 0, destWidth, destHeight);
OS.XFreeGC(xDisplay, tempGC);
OS.XDestroyImage(xMaskPtr);
}
OS.XDestroyImage(xImagePtr);
}
/* Change the source rectangle */
srcX = srcY = 0;
srcWidth = destWidth;
srcHeight = destHeight;
foreground = ~foreground;
}
/* Do the blts */
if (colorPixmap != 0 && maskPixmap != 0) {
XGCValues values = new XGCValues();
OS.XGetGCValues(xDisplay, handle, OS.GCForeground | OS. GCBackground | OS.GCFunction, values);
OS.XSetFunction(xDisplay, handle, OS.GXxor);
OS.XCopyArea(xDisplay, colorPixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY);
OS.XSetForeground(xDisplay, handle, foreground);
OS.XSetBackground(xDisplay, handle, ~foreground);
OS.XSetFunction(xDisplay, handle, OS.GXand);
OS.XCopyPlane(xDisplay, maskPixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY, 1);
OS.XSetFunction(xDisplay, handle, OS.GXxor);
OS.XCopyArea(xDisplay, colorPixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY);
OS.XSetForeground(xDisplay, handle, values.foreground);
OS.XSetBackground(xDisplay, handle, values.background);
OS.XSetFunction(xDisplay, handle, values.function);
}
/* Destroy scaled pixmaps */
if (colorPixmap != 0 && srcImage.pixmap != colorPixmap) OS.XFreePixmap(xDisplay, colorPixmap);
if (maskPixmap != 0 && srcImage.mask != maskPixmap) OS.XFreePixmap(xDisplay, maskPixmap);
}
/* Destroy the image mask if the there is a GC created on the image */
if (srcImage.transparentPixel != -1 && srcImage.memGC != null) srcImage.destroyMask();
}
void drawImageXRender(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int maskPixmap, int maskType) {
int drawable = data.drawable;
int xDisplay = data.display;
int maskPict = 0;
if (maskPixmap != 0) {
int attribCount = 0;
XRenderPictureAttributes attrib = null;
if (srcImage.alpha != -1) {
attribCount = 1;
attrib = new XRenderPictureAttributes();
attrib.repeat = true;
}
maskPict = OS.XRenderCreatePicture(xDisplay, maskPixmap, OS.XRenderFindStandardFormat(xDisplay, maskType), attribCount, attrib);
if (maskPict == 0) SWT.error(SWT.ERROR_NO_HANDLES);
}
int format = OS.XRenderFindVisualFormat(xDisplay, OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay)));
int destPict = OS.XRenderCreatePicture(xDisplay, drawable, format, 0, null);
if (destPict == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int srcPict = OS.XRenderCreatePicture(xDisplay, srcImage.pixmap, format, 0, null);
if (srcPict == 0) SWT.error(SWT.ERROR_NO_HANDLES);
if (srcWidth != destWidth || srcHeight != destHeight) {
int[] transform = new int[]{(int)(((float)srcWidth / destWidth) * 65536), 0, 0, 0, (int)(((float)srcHeight / destHeight) * 65536), 0, 0, 0, 65536};
OS.XRenderSetPictureTransform(xDisplay, srcPict, transform);
if (maskPict != 0) OS.XRenderSetPictureTransform(xDisplay, maskPict, transform);
srcX *= destWidth / (float)srcWidth;
srcY *= destHeight / (float)srcHeight;
}
int clipping = data.clipRgn;
if (data.damageRgn != 0) {
if (clipping == 0) {
clipping = data.damageRgn;
} else {
clipping = OS.XCreateRegion ();
OS.XUnionRegion(clipping, data.clipRgn, clipping);
OS.XIntersectRegion(clipping, data.damageRgn, clipping);
}
}
if (clipping != 0) {
OS.XRenderSetPictureClipRegion(xDisplay, destPict, clipping);
if (clipping != data.clipRgn && clipping != data.damageRgn) {
OS.XDestroyRegion(clipping);
}
}
OS.XRenderComposite(xDisplay, maskPict != 0 ? OS.PictOpOver : OS.PictOpSrc, srcPict, maskPict, destPict, srcX, srcY, srcX, srcY, destX, destY, destWidth, destHeight);
OS.XRenderFreePicture(xDisplay, destPict);
OS.XRenderFreePicture(xDisplay, srcPict);
if (maskPict != 0) OS.XRenderFreePicture(xDisplay, maskPict);
}
void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int depth) {
int xDisplay = data.display;
int xDrawable = data.drawable;
/* Simple case: no stretching */
if ((srcWidth == destWidth) && (srcHeight == destHeight)) {
OS.XCopyArea(xDisplay, srcImage.pixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY);
return;
}
if (device.useXRender) {
drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, 0, -1);
return;
}
/* Streching case */
int xImagePtr = scalePixmap(xDisplay, srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false, false);
if (xImagePtr != 0) {
OS.XPutImage(xDisplay, xDrawable, handle, xImagePtr, 0, 0, destX, destY, destWidth, destHeight);
OS.XDestroyImage(xImagePtr);
}
}
static int scalePixmap(int display, int pixmap, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean flipX, boolean flipY) {
int xSrcImagePtr = OS.XGetImage(display, pixmap, srcX, srcY, srcWidth, srcHeight, OS.AllPlanes, OS.ZPixmap);
if (xSrcImagePtr == 0) return 0;
XImage xSrcImage = new XImage();
OS.memmove(xSrcImage, xSrcImagePtr, XImage.sizeof);
byte[] srcData = new byte[xSrcImage.bytes_per_line * xSrcImage.height];
OS.memmove(srcData, xSrcImage.data, srcData.length);
OS.XDestroyImage(xSrcImagePtr);
int xImagePtr = 0;
int visual = OS.XDefaultVisual(display, OS.XDefaultScreen(display));
switch (xSrcImage.bits_per_pixel) {
case 1:
case 4:
case 8: {
int format = xSrcImage.bits_per_pixel == 1 ? OS.XYBitmap : OS.ZPixmap;
xImagePtr = OS.XCreateImage(display, visual, xSrcImage.depth, format, 0, 0, destWidth, destHeight, xSrcImage.bitmap_pad, 0);
if (xImagePtr == 0) return 0;
XImage xImage = new XImage();
OS.memmove(xImage, xImagePtr, XImage.sizeof);
int bufSize = xImage.bytes_per_line * xImage.height;
if (bufSize < 0) {
OS.XDestroyImage(xImagePtr);
return 0;
}
int bufPtr = OS.XtMalloc(bufSize);
xImage.data = bufPtr;
OS.memmove(xImagePtr, xImage, XImage.sizeof);
byte[] buf = new byte[bufSize];
int srcOrder = xSrcImage.bits_per_pixel == 1 ? xSrcImage.bitmap_bit_order : xSrcImage.byte_order;
int destOrder = xImage.bits_per_pixel == 1 ? xImage.bitmap_bit_order : xImage.byte_order;
ImageData.blit(ImageData.BLIT_SRC,
srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, srcOrder, 0, 0, srcWidth, srcHeight, null, null, null,
ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
buf, xImage.bits_per_pixel, xImage.bytes_per_line, destOrder, 0, 0, destWidth, destHeight, null, null, null,
flipX, flipY);
OS.memmove(bufPtr, buf, bufSize);
break;
}
case 16:
case 24:
case 32: {
xImagePtr = OS.XCreateImage(display, visual, xSrcImage.depth, OS.ZPixmap, 0, 0, destWidth, destHeight, xSrcImage.bitmap_pad, 0);
if (xImagePtr == 0) return 0;
XImage xImage = new XImage();
OS.memmove(xImage, xImagePtr, XImage.sizeof);
int bufSize = xImage.bytes_per_line * xImage.height;
if (bufSize < 0) {
OS.XDestroyImage(xImagePtr);
return 0;
}
int bufPtr = OS.XtMalloc(bufSize);
xImage.data = bufPtr;
OS.memmove(xImagePtr, xImage, XImage.sizeof);
byte[] buf = new byte[bufSize];
ImageData.blit(ImageData.BLIT_SRC,
srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, xSrcImage.byte_order, 0, 0, srcWidth, srcHeight, 0, 0, 0,
ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
buf, xImage.bits_per_pixel, xImage.bytes_per_line, xImage.byte_order, 0, 0, destWidth, destHeight, 0, 0, 0,
flipX, flipY);
OS.memmove(bufPtr, buf, bufSize);
break;
}
}
return xImagePtr;
}
/**
* Draws a line, using the foreground color, between the points
* (<code>x1</code>, <code>y1</code>) and (<code>x2</code>, <code>y2</code>).
*
* @param x1 the first point's x coordinate
* @param y1 the first point's y coordinate
* @param x2 the second point's x coordinate
* @param y2 the second point's y coordinate
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawLine (int x1, int y1, int x2, int y2) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(DRAW);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
Cairo.cairo_move_to(cairo, x1 + xOffset, y1 + yOffset);
Cairo.cairo_line_to(cairo, x2 + xOffset, y2 + yOffset);
Cairo.cairo_stroke(cairo);
return;
}
OS.XDrawLine (data.display, data.drawable, handle, x1, y1, x2, y2);
}
/**
* Draws the outline of an oval, using the foreground color,
* within the specified rectangular area.
* <p>
* The result is a circle or ellipse that fits within the
* rectangle specified by the <code>x</code>, <code>y</code>,
* <code>width</code>, and <code>height</code> arguments.
* </p><p>
* The oval covers an area that is <code>width + 1</code>
* pixels wide and <code>height + 1</code> pixels tall.
* </p>
*
* @param x the x coordinate of the upper left corner of the oval to be drawn
* @param y the y coordinate of the upper left corner of the oval to be drawn
* @param width the width of the oval to be drawn
* @param height the height of the oval to be drawn
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawOval(int x, int y, int width, int height) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(DRAW);
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
if (width == height) {
Cairo.cairo_arc_negative(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, 0, -2 * (float)Compatibility.PI);
} else {
Cairo.cairo_save(cairo);
Cairo.cairo_translate(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f);
Cairo.cairo_scale(cairo, width / 2f, height / 2f);
Cairo.cairo_arc_negative(cairo, 0, 0, 1, 0, -2 * (float)Compatibility.PI);
Cairo.cairo_restore(cairo);
}
Cairo.cairo_stroke(cairo);
return;
}
OS.XDrawArc(data.display, data.drawable, handle, x, y, width, height, 0, 23040);
}
/**
* Draws the path described by the parameter.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param path the path to draw
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see Path
*
* @since 3.1
*/
public void drawPath(Path path) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (path.handle == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
initCairo();
checkGC(DRAW);
long /*int*/ cairo = data.cairo;
Cairo.cairo_save(cairo);
double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
Cairo.cairo_translate(cairo, xOffset, yOffset);
long /*int*/ copy = Cairo.cairo_copy_path(path.handle);
if (copy == 0) SWT.error(SWT.ERROR_NO_HANDLES);
Cairo.cairo_append_path(cairo, copy);
Cairo.cairo_path_destroy(copy);
Cairo.cairo_stroke(cairo);
Cairo.cairo_restore(cairo);
}
/**
* Draws a pixel, using the foreground color, at the specified
* point (<code>x</code>, <code>y</code>).
* <p>
* Note that the receiver's line attributes do not affect this
* operation.
* </p>
*
* @param x the point's x coordinate
* @param y the point's y coordinate
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.0
*/
public void drawPoint (int x, int y) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(DRAW);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
Cairo.cairo_rectangle(cairo, x, y, 1, 1);
Cairo.cairo_fill(cairo);
return;
}
OS.XDrawPoint(data.display, data.drawable, handle, x, y);
}
/**
* Draws the closed polygon which is defined by the specified array
* of integer coordinates, using the receiver's foreground color. The array
* contains alternating x and y values which are considered to represent
* points which are the vertices of the polygon. Lines are drawn between
* each consecutive pair, and between the first pair and last pair in the
* array.
*
* @param pointArray an array of alternating x and y values which are the vertices of the polygon
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawPolygon(int[] pointArray) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
checkGC(DRAW);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
drawPolyline(cairo, pointArray, true);
Cairo.cairo_stroke(cairo);
return;
}
// Motif does not have a native drawPolygon() call. Instead we ensure
// that the first and last points are the same and call drawPolyline().
int length = pointArray.length;
// Need at least 3 points to define the polygon. If 2 or fewer points
// passed in, it is either a line or point so just call drawPolyline().
// Check what happens when XOR is implemented. We may not be able to
// do this optimization.
if (length < 4) {
drawPolyline(pointArray);
return;
}
// If first and last points are the same, the polygon is already closed.
// Just call drawPolyline().
//
// Check what happens when XOR is implemented. We may not be able to
// do this optimization.
if (pointArray[0] == pointArray[length - 2] && (pointArray[1] == pointArray[length - 1])) {
drawPolyline(pointArray);
return;
}
// Grow the list of points by one element and make sure the first and last
// points are the same. This will close the polygon and we can use the
// drawPolyline() call.
int newPoints[] = new int[length + 2];
for (int i = 0; i < length ; i++)
newPoints[i] = pointArray[i];
newPoints[length] = pointArray[0];
newPoints[length + 1] = pointArray[1];
drawPolyline(newPoints);
}
/**
* Draws the polyline which is defined by the specified array
* of integer coordinates, using the receiver's foreground color. The array
* contains alternating x and y values which are considered to represent
* points which are the corners of the polyline. Lines are drawn between
* each consecutive pair, but not between the first pair and last pair in
* the array.
*
* @param pointArray an array of alternating x and y values which are the corners of the polyline
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the point array is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawPolyline(int[] pointArray) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
checkGC(DRAW);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
drawPolyline(cairo, pointArray, false);
Cairo.cairo_stroke(cairo);
return;
}
short[] xPoints = new short[pointArray.length];
for (int i = 0; i<pointArray.length;i++) {
xPoints[i] = (short) pointArray[i];
}
OS.XDrawLines(data.display,data.drawable,handle,xPoints,xPoints.length / 2, OS.CoordModeOrigin);
}
void drawPolyline(long /*int*/ cairo, int[] pointArray, boolean close) {
int count = pointArray.length / 2;
if (count == 0) return;
double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
Cairo.cairo_move_to(cairo, pointArray[0] + xOffset, pointArray[1] + yOffset);
for (int i = 1, j=2; i < count; i++, j += 2) {
Cairo.cairo_line_to(cairo, pointArray[j] + xOffset, pointArray[j + 1] + yOffset);
}
if (close) Cairo.cairo_close_path(cairo);
}
/**
* Draws the outline of the rectangle specified by the arguments,
* using the receiver's foreground color. The left and right edges
* of the rectangle are at <code>x</code> and <code>x + width</code>.
* The top and bottom edges are at <code>y</code> and <code>y + height</code>.
*
* @param x the x coordinate of the rectangle to be drawn
* @param y the y coordinate of the rectangle to be drawn
* @param width the width of the rectangle to be drawn
* @param height the height of the rectangle to be drawn
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawRectangle (int x, int y, int width, int height) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(DRAW);
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
Cairo.cairo_rectangle(cairo, x + xOffset, y + yOffset, width, height);
Cairo.cairo_stroke(cairo);
return;
}
OS.XDrawRectangle (data.display, data.drawable, handle, x, y, width, height);
}
/**
* Draws the outline of the specified rectangle, using the receiver's
* foreground color. The left and right edges of the rectangle are at
* <code>rect.x</code> and <code>rect.x + rect.width</code>. The top
* and bottom edges are at <code>rect.y</code> and
* <code>rect.y + rect.height</code>.
*
* @param rect the rectangle to draw
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawRectangle (Rectangle rect) {
if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
drawRectangle (rect.x, rect.y, rect.width, rect.height);
}
/**
* Draws the outline of the round-cornered rectangle specified by
* the arguments, using the receiver's foreground color. The left and
* right edges of the rectangle are at <code>x</code> and <code>x + width</code>.
* The top and bottom edges are at <code>y</code> and <code>y + height</code>.
* The <em>roundness</em> of the corners is specified by the
* <code>arcWidth</code> and <code>arcHeight</code> arguments, which
* are respectively the width and height of the ellipse used to draw
* the corners.
*
* @param x the x coordinate of the rectangle to be drawn
* @param y the y coordinate of the rectangle to be drawn
* @param width the width of the rectangle to be drawn
* @param height the height of the rectangle to be drawn
* @param arcWidth the width of the arc
* @param arcHeight the height of the arc
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawRoundRectangle (int x, int y, int width, int height, int arcWidth, int arcHeight) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(DRAW);
int nx = x;
int ny = y;
int nw = width;
int nh = height;
int naw = arcWidth;
int nah = arcHeight;
if (nw < 0) {
nw = 0 - nw;
nx = nx - nw;
}
if (nh < 0) {
nh = 0 - nh;
ny = ny - nh;
}
if (naw < 0) naw = 0 - naw;
if (nah < 0) nah = 0 - nah;
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
if (naw == 0 || nah == 0) {
Cairo.cairo_rectangle(cairo, x + xOffset, y + yOffset, width, height);
} else {
float naw2 = naw / 2f;
float nah2 = nah / 2f;
float fw = nw / naw2;
float fh = nh / nah2;
Cairo.cairo_save(cairo);
Cairo.cairo_translate(cairo, nx + xOffset, ny + yOffset);
Cairo.cairo_scale(cairo, naw2, nah2);
Cairo.cairo_move_to(cairo, fw - 1, 0);
Cairo.cairo_arc(cairo, fw - 1, 1, 1, Compatibility.PI + Compatibility.PI/2.0, Compatibility.PI*2.0);
Cairo.cairo_arc(cairo, fw - 1, fh - 1, 1, 0, Compatibility.PI/2.0);
Cairo.cairo_arc(cairo, 1, fh - 1, 1, Compatibility.PI/2, Compatibility.PI);
Cairo.cairo_arc(cairo, 1, 1, 1, Compatibility.PI, 270.0*Compatibility.PI/180.0);
Cairo.cairo_close_path(cairo);
Cairo.cairo_restore(cairo);
}
Cairo.cairo_stroke(cairo);
return;
}
int naw2 = naw / 2;
int nah2 = nah / 2;
int xDisplay = data.display;
int xDrawable = data.drawable;
if (nw > naw) {
if (nh > nah) {
OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, naw, nah, 5760, 5760);
OS.XDrawLine(xDisplay, xDrawable, handle, nx + naw2, ny, nx + nw - naw2, ny);
OS.XDrawArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nah, 0, 5760);
OS.XDrawLine(xDisplay, xDrawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2);
OS.XDrawArc(xDisplay, xDrawable, handle, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760);
OS.XDrawLine(xDisplay,xDrawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh);
OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, naw, nah, 11520, 5760);
OS.XDrawLine(xDisplay, xDrawable, handle, nx, ny + nah2, nx, ny + nh - nah2);
} else {
OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, naw, nh, 5760, 11520);
OS.XDrawLine(xDisplay, xDrawable, handle, nx + naw2, ny, nx + nw - naw2, ny);
OS.XDrawArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nh, 17280, 11520);
OS.XDrawLine(xDisplay,xDrawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh);
}
} else {
if (nh > nah) {
OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, nw, nah, 0, 11520);
OS.XDrawLine(xDisplay, xDrawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2);
OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, nw, nah, 11520, 11520);
OS.XDrawLine(xDisplay,xDrawable,handle, nx, ny + nah2, nx, ny + nh - nah2);
} else {
OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, nw, nh, 0, 23040);
}
}
}
/**
* Draws the given string, using the receiver's current font and
* foreground color. No tab expansion or carriage return processing
* will be performed. The background of the rectangular area where
* the string is being drawn will be filled with the receiver's
* background color.
*
* @param string the string to be drawn
* @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawString (String string, int x, int y) {
drawString(string, x, y, false);
}
/**
* Draws the given string, using the receiver's current font and
* foreground color. No tab expansion or carriage return processing
* will be performed. If <code>isTransparent</code> is <code>true</code>,
* then the background of the rectangular area where the string is being
* drawn will not be modified, otherwise it will be filled with the
* receiver's background color.
*
* @param string the string to be drawn
* @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
* @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawString (String string, int x, int y, boolean isTransparent) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (string.length() == 0) return;
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
//TODO - honor isTransparent
checkGC(FOREGROUND | FONT);
cairo_font_extents_t extents = new cairo_font_extents_t();
Cairo.cairo_font_extents(cairo, extents);
double baseline = y + extents.ascent;
Cairo.cairo_move_to(cairo, x, baseline);
byte[] buffer = Converter.wcsToMbcs(null, string, true);
Cairo.cairo_show_text(cairo, buffer);
Cairo.cairo_new_path(cairo);
return;
}
setString(string);
checkGC(FOREGROUND | FONT | BACKGROUND_BG);
if (isTransparent) {
OS.XmStringDraw (data.display, data.drawable, data.font.handle, data.xmString, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
} else {
OS.XmStringDrawImage (data.display, data.drawable, data.font.handle, data.xmString, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
}
}
void createRenderTable() {
int fontList = data.font.handle;
/* Get the width of the tabs */
byte[] buffer = {(byte)' ', 0};
int xmString = OS.XmStringCreate(buffer, OS.XmFONTLIST_DEFAULT_TAG);
int tabWidth = OS.XmStringWidth(fontList, xmString) * 8;
OS.XmStringFree(xmString);
/* Create the tab list */
int [] tabs = new int[16];
int tab = OS.XmTabCreate(tabWidth, (byte) OS.XmPIXELS, (byte) OS.XmRELATIVE, (byte) OS.XmALIGNMENT_BEGINNING, null);
for (int i = 0; i < tabs.length; i++) tabs[i] = tab;
int tabList = OS.XmTabListInsertTabs(0, tabs, tabs.length, 0);
/* Create a font context to iterate over the elements in the font list */
int[] fontBuffer = new int[1];
if (!OS.XmFontListInitFontContext(fontBuffer, fontList)) {
SWT.error(SWT.ERROR_NO_HANDLES);
}
int context = fontBuffer[0], fontListEntry = 0;
int[] renditions = new int[4]; int renditionCount = 0;
/* Create a rendition for each entry in the font list */
while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, fontBuffer);
int fontType = (fontBuffer [0] == 0) ? OS.XmFONT_IS_FONT : OS.XmFONT_IS_FONTSET;
if (fontPtr == 0) SWT.error(SWT.ERROR_NO_HANDLES);
int [] argList = {
OS.XmNtabList, tabList,
OS.XmNfont, fontPtr,
OS.XmNfontType, fontType,
};
int rendition = OS.XmRenditionCreate(data.device.shellHandle, OS.XmFONTLIST_DEFAULT_TAG, argList, argList.length / 2);
renditions[renditionCount++] = rendition;
if (renditionCount == renditions.length) {
int[] newArray = new int[renditions.length + 4];
System.arraycopy(newArray, 0, renditions, 0, renditionCount);
renditions = newArray;
}
}
OS.XmFontListFreeFontContext(context);
OS.XmTabFree(tab);
OS.XmTabListFree(tabList);
/* Create the render table from the renditions */
data.renderTable = OS.XmRenderTableAddRenditions(0, renditions, renditionCount, OS.XmMERGE_REPLACE);
for (int i = 0; i < renditionCount; i++) OS.XmRenditionFree(renditions[i]);
}
/**
* Draws the given string, using the receiver's current font and
* foreground color. Tab expansion and carriage return processing
* are performed. The background of the rectangular area where
* the text is being drawn will be filled with the receiver's
* background color.
*
* @param string the string to be drawn
* @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawText (String string, int x, int y) {
drawText(string, x, y, SWT.DRAW_DELIMITER | SWT.DRAW_TAB);
}
/**
* Draws the given string, using the receiver's current font and
* foreground color. Tab expansion and carriage return processing
* are performed. If <code>isTransparent</code> is <code>true</code>,
* then the background of the rectangular area where the text is being
* drawn will not be modified, otherwise it will be filled with the
* receiver's background color.
*
* @param string the string to be drawn
* @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawText (String string, int x, int y, boolean isTransparent) {
int flags = SWT.DRAW_DELIMITER | SWT.DRAW_TAB;
if (isTransparent) flags |= SWT.DRAW_TRANSPARENT;
drawText(string, x, y, flags);
}
/**
* Draws the given string, using the receiver's current font and
* foreground color. Tab expansion, line delimiter and mnemonic
* processing are performed according to the specified flags. If
* <code>flags</code> includes <code>DRAW_TRANSPARENT</code>,
* then the background of the rectangular area where the text is being
* drawn will not be modified, otherwise it will be filled with the
* receiver's background color.
* <p>
* The parameter <code>flags</code> may be a combination of:
* <dl>
* <dt><b>DRAW_DELIMITER</b></dt>
* <dd>draw multiple lines</dd>
* <dt><b>DRAW_TAB</b></dt>
* <dd>expand tabs</dd>
* <dt><b>DRAW_MNEMONIC</b></dt>
* <dd>underline the mnemonic character</dd>
* <dt><b>DRAW_TRANSPARENT</b></dt>
* <dd>transparent background</dd>
* </dl>
* </p>
*
* @param string the string to be drawn
* @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
* @param flags the flags specifying how to process the text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void drawText (String string, int x, int y, int flags) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (string.length() == 0) return;
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
//TODO - honor flags
checkGC(FOREGROUND | FONT);
cairo_font_extents_t extents = new cairo_font_extents_t();
Cairo.cairo_font_extents(cairo, extents);
double baseline = y + extents.ascent;
Cairo.cairo_move_to(cairo, x, baseline);
byte[] buffer = Converter.wcsToMbcs(null, string, true);
Cairo.cairo_show_text(cairo, buffer);
Cairo.cairo_new_path(cairo);
return;
}
setText(string, flags);
checkGC(FOREGROUND | FONT | BACKGROUND_BG);
int xDisplay = data.display;
int xDrawable = data.drawable;
if (data.image != null) OS.XtRegisterDrawable (xDisplay, xDrawable, data.device.shellHandle);
int xmMnemonic = data.xmMnemonic;
if (xmMnemonic != 0) {
OS.XmStringDrawUnderline(xDisplay, xDrawable, data.renderTable, data.xmText, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null, xmMnemonic);
} else {
if ((flags & SWT.DRAW_TRANSPARENT) != 0) {
OS.XmStringDraw(xDisplay, xDrawable, data.renderTable, data.xmText, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
} else {
OS.XmStringDrawImage(xDisplay, xDrawable, data.renderTable, data.xmText, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
}
}
if (data.image != null) OS.XtUnregisterDrawable (xDisplay, xDrawable);
}
/**
* Compares the argument to the receiver, and returns true
* if they represent the <em>same</em> object using a class
* specific comparison.
*
* @param object the object to compare with this object
* @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
*
* @see #hashCode
*/
public boolean equals (Object object) {
if (object == this) return true;
if (!(object instanceof GC)) return false;
return handle == ((GC)object).handle;
}
/**
* Fills the interior of a circular or elliptical arc within
* the specified rectangular area, with the receiver's background
* color.
* <p>
* The resulting arc begins at <code>startAngle</code> and extends
* for <code>arcAngle</code> degrees, using the current color.
* Angles are interpreted such that 0 degrees is at the 3 o'clock
* position. A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
* </p><p>
* The center of the arc is the center of the rectangle whose origin
* is (<code>x</code>, <code>y</code>) and whose size is specified by the
* <code>width</code> and <code>height</code> arguments.
* </p><p>
* The resulting arc covers an area <code>width + 1</code> pixels wide
* by <code>height + 1</code> pixels tall.
* </p>
*
* @param x the x coordinate of the upper-left corner of the arc to be filled
* @param y the y coordinate of the upper-left corner of the arc to be filled
* @param width the width of the arc to be filled
* @param height the height of the arc to be filled
* @param startAngle the beginning angle
* @param arcAngle the angular extent of the arc, relative to the start angle
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawArc
*/
public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(FILL);
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
if (width == 0 || height == 0 || arcAngle == 0) return;
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
if (width == height) {
if (arcAngle >= 0) {
Cairo.cairo_arc_negative(cairo, x + width / 2f, y + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
} else {
Cairo.cairo_arc(cairo, x + width / 2f, y + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
}
Cairo.cairo_line_to(cairo, x + width / 2f, y + height / 2f);
} else {
Cairo.cairo_save(cairo);
Cairo.cairo_translate(cairo, x + width / 2f, y + height / 2f);
Cairo.cairo_scale(cairo, width / 2f, height / 2f);
if (arcAngle >= 0) {
Cairo.cairo_arc_negative(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
} else {
Cairo.cairo_arc(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
}
Cairo.cairo_line_to(cairo, 0, 0);
Cairo.cairo_restore(cairo);
}
Cairo.cairo_fill(cairo);
return;
}
OS.XFillArc(data.display, data.drawable, handle, x, y, width, height, startAngle * 64, arcAngle * 64);
}
/**
* Fills the interior of the specified rectangle with a gradient
* sweeping from left to right or top to bottom progressing
* from the receiver's foreground color to its background color.
*
* @param x the x coordinate of the rectangle to be filled
* @param y the y coordinate of the rectangle to be filled
* @param width the width of the rectangle to be filled, may be negative
* (inverts direction of gradient if horizontal)
* @param height the height of the rectangle to be filled, may be negative
* (inverts direction of gradient if vertical)
* @param vertical if true sweeps from top to bottom, else
* sweeps from left to right
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawRectangle(int, int, int, int)
*/
public void fillGradientRectangle(int x, int y, int width, int height, boolean vertical) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if ((width == 0) || (height == 0)) return;
RGB backgroundRGB, foregroundRGB;
backgroundRGB = getBackground().getRGB();
foregroundRGB = getForeground().getRGB();
RGB fromRGB, toRGB;
fromRGB = foregroundRGB;
toRGB = backgroundRGB;
boolean swapColors = false;
if (width < 0) {
x += width; width = -width;
if (! vertical) swapColors = true;
}
if (height < 0) {
y += height; height = -height;
if (vertical) swapColors = true;
}
if (swapColors) {
fromRGB = backgroundRGB;
toRGB = foregroundRGB;
}
if (fromRGB.equals(toRGB)) {
fillRectangle(x, y, width, height);
return;
}
/* X Window deals with a virtually limitless array of color formats
* but we only distinguish between paletted and direct modes
*/
int xDisplay = data.display;
int xScreenNum = OS.XDefaultScreen(xDisplay);
final int xScreen = OS.XDefaultScreenOfDisplay(xDisplay);
final int xVisual = OS.XDefaultVisual(xDisplay, xScreenNum);
Visual visual = new Visual();
OS.memmove(visual, xVisual, Visual.sizeof);
final int depth = OS.XDefaultDepthOfScreen(xScreen);
final boolean directColor = (depth > 8);
// This code is intentionally commented since elsewhere in SWT we
// assume that depth <= 8 means we are in a paletted mode though
// this is not always the case.
//final boolean directColor = (visual.c_class == OS.TrueColor) || (visual.c_class == OS.DirectColor);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
long /*int*/ pattern;
if (vertical) {
pattern = Cairo.cairo_pattern_create_linear (0.0, 0.0, 0.0, 1.0);
} else {
pattern = Cairo.cairo_pattern_create_linear (0.0, 0.0, 1.0, 0.0);
}
Cairo.cairo_pattern_add_color_stop_rgba (pattern, 0, fromRGB.red / 255f, fromRGB.green / 255f, fromRGB.blue / 255f, data.alpha / 255f);
Cairo.cairo_pattern_add_color_stop_rgba (pattern, 1, toRGB.red / 255f, toRGB.green / 255f, toRGB.blue / 255f, data.alpha / 255f);
Cairo.cairo_save(cairo);
Cairo.cairo_translate(cairo, x, y);
Cairo.cairo_scale(cairo, width, height);
Cairo.cairo_rectangle(cairo, 0, 0, 1, 1);
Cairo.cairo_set_source(cairo, pattern);
Cairo.cairo_fill(cairo);
Cairo.cairo_restore(cairo);
Cairo.cairo_pattern_destroy(pattern);
return;
}
final int redBits, greenBits, blueBits;
if (directColor) {
// RGB mapped display
redBits = getChannelWidth(visual.red_mask);
greenBits = getChannelWidth(visual.green_mask);
blueBits = getChannelWidth(visual.blue_mask);
} else {
// Index display
redBits = greenBits = blueBits = 0;
}
ImageData.fillGradientRectangle(this, data.device,
x, y, width, height, vertical, fromRGB, toRGB,
redBits, greenBits, blueBits);
}
/**
* Computes the required channel width (depth) from a mask.
*/
static int getChannelWidth(int mask) {
int width = 0;
while (mask != 0) {
width += (mask & 1);
mask >>>= 1;
}
return width;
}
/**
* Fills the interior of an oval, within the specified
* rectangular area, with the receiver's background
* color.
*
* @param x the x coordinate of the upper left corner of the oval to be filled
* @param y the y coordinate of the upper left corner of the oval to be filled
* @param width the width of the oval to be filled
* @param height the height of the oval to be filled
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawOval
*/
public void fillOval (int x, int y, int width, int height) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(FILL);
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
if (width == height) {
Cairo.cairo_arc_negative(cairo, x + width / 2f, y + height / 2f, width / 2f, 0, 2 * (float)Compatibility.PI);
} else {
Cairo.cairo_save(cairo);
Cairo.cairo_translate(cairo, x + width / 2f, y + height / 2f);
Cairo.cairo_scale(cairo, width / 2f, height / 2f);
Cairo.cairo_arc_negative(cairo, 0, 0, 1, 0, 2 * (float)Compatibility.PI);
Cairo.cairo_restore(cairo);
}
Cairo.cairo_fill(cairo);
return;
}
OS.XFillArc (data.display, data.drawable, handle, x, y, width, height, 0, 23040);
}
/**
* Fills the path described by the parameter.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param path the path to fill
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see Path
*
* @since 3.1
*/
public void fillPath (Path path) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (path.handle == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
initCairo();
checkGC(FILL);
long /*int*/ cairo = data.cairo;
long /*int*/ copy = Cairo.cairo_copy_path(path.handle);
if (copy == 0) SWT.error(SWT.ERROR_NO_HANDLES);
Cairo.cairo_append_path(cairo, copy);
Cairo.cairo_path_destroy(copy);
Cairo.cairo_fill(cairo);
}
/**
* Fills the interior of the closed polygon which is defined by the
* specified array of integer coordinates, using the receiver's
* background color. The array contains alternating x and y values
* which are considered to represent points which are the vertices of
* the polygon. Lines are drawn between each consecutive pair, and
* between the first pair and last pair in the array.
*
* @param pointArray an array of alternating x and y values which are the vertices of the polygon
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawPolygon
*/
public void fillPolygon(int[] pointArray) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
checkGC(FILL);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
drawPolyline(cairo, pointArray, true);
Cairo.cairo_fill(cairo);
return;
}
short[] xPoints = new short[pointArray.length];
for (int i = 0; i<pointArray.length;i++) {
xPoints[i] = (short) pointArray[i];
}
OS.XFillPolygon(data.display, data.drawable, handle,xPoints, xPoints.length / 2, OS.Complex, OS.CoordModeOrigin);
}
/**
* Fills the interior of the rectangle specified by the arguments,
* using the receiver's background color.
*
* @param x the x coordinate of the rectangle to be filled
* @param y the y coordinate of the rectangle to be filled
* @param width the width of the rectangle to be filled
* @param height the height of the rectangle to be filled
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawRectangle(int, int, int, int)
*/
public void fillRectangle (int x, int y, int width, int height) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(FILL);
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
Cairo.cairo_rectangle(cairo, x, y, width, height);
Cairo.cairo_fill(cairo);
return;
}
OS.XFillRectangle (data.display, data.drawable, handle, x, y, width, height);
}
/**
* Fills the interior of the specified rectangle, using the receiver's
* background color.
*
* @param rect the rectangle to be filled
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawRectangle(int, int, int, int)
*/
public void fillRectangle (Rectangle rect) {
if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
fillRectangle(rect.x, rect.y, rect.width, rect.height);
}
/**
* Fills the interior of the round-cornered rectangle specified by
* the arguments, using the receiver's background color.
*
* @param x the x coordinate of the rectangle to be filled
* @param y the y coordinate of the rectangle to be filled
* @param width the width of the rectangle to be filled
* @param height the height of the rectangle to be filled
* @param arcWidth the width of the arc
* @param arcHeight the height of the arc
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #drawRoundRectangle
*/
public void fillRoundRectangle (int x, int y, int width, int height, int arcWidth, int arcHeight) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(FILL);
int nx = x;
int ny = y;
int nw = width;
int nh = height;
int naw = arcWidth;
int nah = arcHeight;
if (nw < 0) {
nw = 0 - nw;
nx = nx - nw;
}
if (nh < 0) {
nh = 0 - nh;
ny = ny -nh;
}
if (naw < 0) naw = 0 - naw;
if (nah < 0) nah = 0 - nah;
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
if (naw == 0 || nah == 0) {
Cairo.cairo_rectangle(cairo, x, y, width, height);
} else {
float naw2 = naw / 2f;
float nah2 = nah / 2f;
float fw = nw / naw2;
float fh = nh / nah2;
Cairo.cairo_save(cairo);
Cairo.cairo_translate(cairo, nx, ny);
Cairo.cairo_scale(cairo, naw2, nah2);
Cairo.cairo_move_to(cairo, fw - 1, 0);
Cairo.cairo_arc(cairo, fw - 1, 1, 1, Compatibility.PI + Compatibility.PI/2.0, Compatibility.PI*2.0);
Cairo.cairo_arc(cairo, fw - 1, fh - 1, 1, 0, Compatibility.PI/2.0);
Cairo.cairo_arc(cairo, 1, fh - 1, 1, Compatibility.PI/2, Compatibility.PI);
Cairo.cairo_arc(cairo, 1, 1, 1, Compatibility.PI, 270.0*Compatibility.PI/180.0);
Cairo.cairo_close_path(cairo);
Cairo.cairo_restore(cairo);
}
Cairo.cairo_fill(cairo);
return;
}
int naw2 = naw / 2;
int nah2 = nah / 2;
int xDisplay = data.display;
int xDrawable = data.drawable;
if (nw > naw) {
if (nh > nah) {
OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, naw, nah, 5760, 5760);
OS.XFillRectangle(xDisplay, xDrawable, handle, nx + naw2, ny, nw - naw2 * 2, nah2);
OS.XFillArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nah, 0, 5760);
OS.XFillRectangle(xDisplay, xDrawable, handle, nx, ny + nah2, nw, nh - nah2 * 2);
OS.XFillArc(xDisplay, xDrawable, handle, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760);
OS.XFillRectangle(xDisplay, xDrawable, handle, nx + naw2, ny + nh - nah2, nw - naw2 * 2, nah2);
OS.XFillArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, naw, nah, 11520, 5760);
} else {
OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, naw, nh, 5760, 11520);
OS.XFillRectangle(xDisplay, xDrawable, handle, nx + naw2, ny, nw - naw2 * 2, nh);
OS.XFillArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nh, 17280, 11520);
}
} else {
if (nh > nah) {
OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, nw, nah, 0, 11520);
OS.XFillRectangle(xDisplay, xDrawable, handle, nx, ny + nah2, nw, nh - nah2 * 2);
OS.XFillArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, nw, nah, 11520, 11520);
} else {
OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, nw, nh, 0, 23040);
}
}
}
char fixMnemonic(char[] text) {
char mnemonic=0;
int i=0, j=0;
while (i < text.length) {
if ((text [j++] = text [i++]) == '&') {
if (i == text.length) {continue;}
if (text [i] == '&') {i++; continue;}
if (mnemonic == 0) mnemonic = text [i];
j--;
}
}
while (j < text.length) text [j++] = 0;
return mnemonic;
}
/**
* Returns the <em>advance width</em> of the specified character in
* the font which is currently selected into the receiver.
* <p>
* The advance width is defined as the horizontal distance the cursor
* should move after printing the character in the selected font.
* </p>
*
* @param ch the character to measure
* @return the distance in the x direction to move past the character before painting the next
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getAdvanceWidth(char ch) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(FONT);
int fontList = data.font.handle;
byte[] charBuffer = Converter.wcsToMbcs(getCodePage (), new char[] { ch }, false);
int val = charBuffer[0] & 0xFF;
/* Create a font context to iterate over each element in the font list */
int[] buffer = new int[1];
if (!OS.XmFontListInitFontContext(buffer, fontList)) {
SWT.error(SWT.ERROR_NO_HANDLES);
}
int context = buffer[0];
XFontStruct fontStruct = new XFontStruct();
XCharStruct charStruct = new XCharStruct();
int fontListEntry;
int[] fontStructPtr = new int[1];
int[] fontNamePtr = new int[1];
/* Go through each entry in the font list. */
while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, buffer);
if (buffer[0] == 0) {
OS.memmove(fontStruct, fontPtr, XFontStruct.sizeof);
/* FontList contains a single font */
if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
/* Single byte fontStruct */
if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width as the font's maximum width.
*/
charWidth = fontStruct.max_bounds_width;
} else {
OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
charWidth = charStruct.width;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return charWidth;
}
}
} else {
/* Double byte fontStruct */
int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
int row = 0;
if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
int col = charBuffer[0] - fontStruct.min_char_or_byte2;
if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width as the font's maximum width.
*/
charWidth = fontStruct.max_bounds_width;
} else {
int offset = row * charsPerRow + col;
OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
charWidth = charStruct.width;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return charWidth;
}
}
}
} else {
/* FontList contains a fontSet */
int nFonts = OS.XFontsOfFontSet(fontPtr, fontStructPtr, fontNamePtr);
int [] fontStructs = new int[nFonts];
OS.memmove(fontStructs, fontStructPtr[0], nFonts * 4);
/* Go through each fontStruct in the font set */
for (int i = 0; i < nFonts; i++) {
OS.memmove(fontStruct, fontStructs[i], XFontStruct.sizeof);
if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
/* Single byte fontStruct */
if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width as the font's maximum width.
*/
charWidth = fontStruct.max_bounds_width;
} else {
OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
charWidth = charStruct.width;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return charWidth;
}
}
} else {
/* Double byte fontStruct */
int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
int row = 0;
if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
int col = charBuffer[0] - fontStruct.min_char_or_byte2;
if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width as the font's maximum width.
*/
charWidth = fontStruct.max_bounds_width;
} else {
int offset = row * charsPerRow + col;
OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
charWidth = charStruct.width;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return charWidth;
}
}
}
}
}
}
OS.XmFontListFreeFontContext(context);
return stringExtent(new String(new char[]{ch})).x;
}
/**
* Returns <code>true</code> if receiver is using the operating system's
* advanced graphics subsystem. Otherwise, <code>false</code> is returned
* to indicate that normal graphics are in use.
* <p>
* Advanced graphics may not be installed for the operating system. In this
* case, <code>false</code> is always returned. Some operating system have
* only one graphics subsystem. If this subsystem supports advanced graphics,
* then <code>true</code> is always returned. If any graphics operation such
* as alpha, antialias, patterns, interpolation, paths, clipping or transformation
* has caused the receiver to switch from regular to advanced graphics mode,
* <code>true</code> is returned. If the receiver has been explicitly switched
* to advanced mode and this mode is supported, <code>true</code> is returned.
* </p>
*
* @return the advanced value
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setAdvanced
*
* @since 3.1
*/
public boolean getAdvanced() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.cairo != 0;
}
/**
* Returns the receiver's alpha value. The alpha value
* is between 0 (transparent) and 255 (opaque).
*
* @return the alpha value
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public int getAlpha() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.alpha;
}
/**
* Returns the receiver's anti-aliasing setting value, which will be
* one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code> or
* <code>SWT.ON</code>. Note that this controls anti-aliasing for all
* <em>non-text drawing</em> operations.
*
* @return the anti-aliasing setting
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getTextAntialias
*
* @since 3.1
*/
public int getAntialias() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.cairo == 0) return SWT.DEFAULT;
int antialias = Cairo.cairo_get_antialias(data.cairo);
switch (antialias) {
case Cairo.CAIRO_ANTIALIAS_DEFAULT: return SWT.DEFAULT;
case Cairo.CAIRO_ANTIALIAS_NONE: return SWT.OFF;
case Cairo.CAIRO_ANTIALIAS_GRAY:
case Cairo.CAIRO_ANTIALIAS_SUBPIXEL: return SWT.ON;
}
return SWT.DEFAULT;
}
/**
* Returns the background color.
*
* @return the receiver's background color
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Color getBackground() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
XColor color = data.background;
if ((data.state & BACKGROUND_RGB) == 0) {
OS.XQueryColor(data.display, data.colormap, color);
data.state |= BACKGROUND_RGB;
}
return Color.motif_new(data.device, color);
}
/**
* Returns the background pattern. The default value is
* <code>null</code>.
*
* @return the receiver's background pattern
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see Pattern
*
* @since 3.1
*/
public Pattern getBackgroundPattern() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.backgroundPattern;
}
/**
* Returns the width of the specified character in the font
* selected into the receiver.
* <p>
* The width is defined as the space taken up by the actual
* character, not including the leading and tailing whitespace
* or overhang.
* </p>
*
* @param ch the character to measure
* @return the width of the character
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getCharWidth(char ch) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(FONT);
int fontList = data.font.handle;
byte[] charBuffer = Converter.wcsToMbcs(getCodePage (), new char[] { ch }, false);
int val = charBuffer[0] & 0xFF;
/* Create a font context to iterate over each element in the font list */
int[] buffer = new int[1];
if (!OS.XmFontListInitFontContext(buffer, fontList)) {
SWT.error(SWT.ERROR_NO_HANDLES);
}
int context = buffer[0];
XFontStruct fontStruct = new XFontStruct();
XCharStruct charStruct = new XCharStruct();
int fontListEntry;
int[] fontStructPtr = new int[1];
int[] fontNamePtr = new int[1];
/* Go through each entry in the font list. */
while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, buffer);
if (buffer[0] == 0) {
OS.memmove(fontStruct, fontPtr, XFontStruct.sizeof);
/* FontList contains a single font */
if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
/* Single byte fontStruct */
if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int lBearing = 0;
int rBearing = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width and left/right bearings as the font.
*/
charWidth = fontStruct.max_bounds_width;
lBearing = fontStruct.min_bounds_lbearing;
rBearing = fontStruct.max_bounds_rbearing;
} else {
OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
charWidth = charStruct.width;
lBearing = charStruct.lbearing;
rBearing = charStruct.rbearing;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return rBearing - lBearing;
}
}
} else {
/* Double byte fontStruct */
int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
int row = 0;
if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
int col = charBuffer[0] - fontStruct.min_char_or_byte2;
if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int lBearing = 0;
int rBearing = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width and left/right bearings as the font.
*/
charWidth = fontStruct.max_bounds_width;
lBearing = fontStruct.min_bounds_lbearing;
rBearing = fontStruct.max_bounds_rbearing;
} else {
int offset = row * charsPerRow + col;
OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
charWidth = charStruct.width;
lBearing = charStruct.lbearing;
rBearing = charStruct.rbearing;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return rBearing - lBearing;
}
}
}
} else {
/* FontList contains a fontSet */
int nFonts = OS.XFontsOfFontSet(fontPtr, fontStructPtr, fontNamePtr);
int [] fontStructs = new int[nFonts];
OS.memmove(fontStructs, fontStructPtr[0], nFonts * 4);
/* Go through each fontStruct in the font set */
for (int i = 0; i < nFonts; i++) {
OS.memmove(fontStruct, fontStructs[i], XFontStruct.sizeof);
if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
/* Single byte fontStruct */
if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int lBearing = 0;
int rBearing = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width and left/right bearings as the font.
*/
charWidth = fontStruct.max_bounds_width;
lBearing = fontStruct.min_bounds_lbearing;
rBearing = fontStruct.max_bounds_rbearing;
} else {
OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
charWidth = charStruct.width;
lBearing = charStruct.lbearing;
rBearing = charStruct.rbearing;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return rBearing - lBearing;
}
}
} else {
/* Double byte fontStruct */
int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
int row = 0;
if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
int col = charBuffer[0] - fontStruct.min_char_or_byte2;
if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
/* The font contains the character */
int charWidth = 0;
int lBearing = 0;
int rBearing = 0;
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width and left/right bearings as the font.
*/
charWidth = fontStruct.max_bounds_width;
lBearing = fontStruct.min_bounds_lbearing;
rBearing = fontStruct.max_bounds_rbearing;
} else {
int offset = row * charsPerRow + col;
OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
charWidth = charStruct.width;
lBearing = charStruct.lbearing;
rBearing = charStruct.rbearing;
}
if (charWidth != 0) {
OS.XmFontListFreeFontContext(context);
return rBearing - lBearing;
}
}
}
}
}
}
OS.XmFontListFreeFontContext(context);
return stringExtent(new String(new char[]{ch})).x;
}
/**
* Returns the bounding rectangle of the receiver's clipping
* region. If no clipping region is set, the return value
* will be a rectangle which covers the entire bounds of the
* object the receiver is drawing on.
*
* @return the bounding rectangle of the clipping region
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Rectangle getClipping() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
/* Calculate visible bounds in device space */
int x = 0, y = 0, width = 0, height = 0;
int[] w = new int[1], h = new int[1], unused = new int[1];
OS.XGetGeometry(data.display, data.drawable, unused, unused, unused, w, h, unused, unused);
width = w[0];
height = h[0];
/* Intersect visible bounds with clipping in device space and then convert then to user space */
int cairo = data.cairo;
int clipRgn = data.clipRgn;
int damageRgn = data.damageRgn;
if (clipRgn != 0 || damageRgn != 0 || cairo != 0) {
int rgn = OS.XCreateRegion ();
XRectangle rect = new XRectangle();
rect.width = (short)width;
rect.height = (short)height;
OS.XUnionRectWithRegion(rect, rgn, rgn);
if (damageRgn != 0) {
OS.XIntersectRegion (damageRgn, rgn, rgn);
}
/* Intersect visible bounds with clipping */
if (clipRgn != 0) {
/* Convert clipping to device space if needed */
if (data.clippingTransform != null) {
clipRgn = convertRgn(clipRgn, data.clippingTransform);
OS.XIntersectRegion(rgn, clipRgn, rgn);
OS.XDestroyRegion(clipRgn);
} else {
OS.XIntersectRegion(rgn, clipRgn, rgn);
}
}
/* Convert to user space */
if (cairo != 0) {
double[] matrix = new double[6];
Cairo.cairo_get_matrix(cairo, matrix);
Cairo.cairo_matrix_invert(matrix);
clipRgn = convertRgn(rgn, matrix);
OS.XDestroyRegion(rgn);
rgn = clipRgn;
}
OS.XClipBox(rgn, rect);
OS.XDestroyRegion(rgn);
x = rect.x;
y = rect.y;
width = rect.width;
height = rect.height;
}
return new Rectangle(x, y, width, height);
}
/**
* Sets the region managed by the argument to the current
* clipping region of the receiver.
*
* @param region the region to fill with the clipping region
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the region is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the region is disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void getClipping(Region region) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (region == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
int clipping = region.handle;
OS.XSubtractRegion (clipping, clipping, clipping);
long /*int*/ cairo = data.cairo;
int clipRgn = data.clipRgn;
if (clipRgn == 0) {
int[] width = new int[1], height = new int[1], unused = new int[1];
OS.XGetGeometry(data.display, data.drawable, unused, unused, unused, width, height, unused, unused);
XRectangle rect = new XRectangle();
rect.x = 0;
rect.y = 0;
rect.width = (short)width[0];
rect.height = (short)height[0];
OS.XUnionRectWithRegion(rect, clipping, clipping);
} else {
/* Convert clipping to device space if needed */
if (data.clippingTransform != null) {
int rgn = convertRgn(clipRgn, data.clippingTransform);
OS.XUnionRegion(clipping, rgn, clipping);
OS.XDestroyRegion(rgn);
} else {
OS.XUnionRegion(clipping, clipRgn, clipping);
}
}
if (data.damageRgn != 0) {
OS.XIntersectRegion(clipping, data.damageRgn, clipping);
}
/* Convert to user space */
if (cairo != 0) {
double[] matrix = new double[6];
Cairo.cairo_get_matrix(cairo, matrix);
Cairo.cairo_matrix_invert(matrix);
int rgn = convertRgn(clipping, matrix);
OS.XSubtractRegion(clipping, clipping, clipping);
OS.XUnionRegion(clipping, rgn, clipping);
OS.XDestroyRegion(rgn);
}
}
String getCodePage () {
return data.font.codePage;
}
/**
* Returns the receiver's fill rule, which will be one of
* <code>SWT.FILL_EVEN_ODD</code> or <code>SWT.FILL_WINDING</code>.
*
* @return the receiver's fill rule
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public int getFillRule() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
XGCValues values = new XGCValues();
OS.XGetGCValues(data.display, handle, OS.GCFillRule, values);
return values.fill_rule == OS.WindingRule ? SWT.FILL_WINDING : SWT.FILL_EVEN_ODD;
}
/**
* Returns the font currently being used by the receiver
* to draw and measure text.
*
* @return the receiver's font
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Font getFont () {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return Font.motif_new(data.device, data.font.handle);
}
int getFontHeight () {
int fontList = data.font.handle;
/* Create a font context to iterate over each element in the font list */
int [] buffer = new int [1];
if (!OS.XmFontListInitFontContext (buffer, fontList)) {
SWT.error(SWT.ERROR_NO_HANDLES);
}
int context = buffer [0];
/* Values discovering during iteration */
int height = 0;
XFontStruct fontStruct = new XFontStruct ();
int fontListEntry;
int [] fontStructPtr = new int [1];
int [] fontNamePtr = new int [1];
/* Go through each entry in the font list. */
while ((fontListEntry = OS.XmFontListNextEntry (context)) != 0) {
int fontPtr = OS.XmFontListEntryGetFont (fontListEntry, buffer);
if (buffer [0] == 0) {
/* FontList contains a single font */
OS.memmove (fontStruct, fontPtr, XFontStruct.sizeof);
int fontHeight = fontStruct.ascent + fontStruct.descent;
height = Math.max(height, fontHeight);
} else {
/* FontList contains a fontSet */
int nFonts = OS.XFontsOfFontSet (fontPtr, fontStructPtr, fontNamePtr);
int [] fontStructs = new int [nFonts];
OS.memmove (fontStructs, fontStructPtr [0], nFonts * 4);
/* Go through each fontStruct in the font set */
for (int i=0; i<nFonts; i++) {
OS.memmove (fontStruct, fontStructs[i], XFontStruct.sizeof);
int fontHeight = fontStruct.ascent + fontStruct.descent;
height = Math.max(height, fontHeight);
}
}
}
OS.XmFontListFreeFontContext (context);
return height;
}
/**
* Returns a FontMetrics which contains information
* about the font currently being used by the receiver
* to draw and measure text.
*
* @return font metrics for the receiver's font
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public FontMetrics getFontMetrics() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
checkGC(FONT);
int xDisplay = data.display;
Font font = data.font;
int fontList = font.handle;
/* Create a font context to iterate over each element in the font list */
int[] buffer = new int[1];
if (!OS.XmFontListInitFontContext(buffer, fontList)) {
SWT.error(SWT.ERROR_NO_HANDLES);
}
int context = buffer[0];
/* Values discovering during iteration */
int ascent = 0;
int descent = 0;
int averageCharWidth = 0, numAverageCharWidth = 0;
int leading = 0;
int height = 0;
XFontStruct fontStruct = new XFontStruct();
int fontListEntry;
int[] fontStructPtr = new int[1];
int[] fontNamePtr = new int[1];
/* Go through each entry in the font list. */
while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, buffer);
if (buffer[0] == 0) {
/* FontList contains a single font */
OS.memmove(fontStruct, fontPtr, XFontStruct.sizeof);
ascent = Math.max(ascent, fontStruct.ascent);
descent = Math.max(descent, fontStruct.descent);
int fontHeight = fontStruct.ascent + fontStruct.descent;
height = Math.max(height, fontHeight);
/* Calculate average character width */
int propPtr = fontStruct.properties;
for (int i = 0; i < fontStruct.n_properties; i++) {
/* Look through properties for XAFONT */
int[] prop = new int[2];
OS.memmove(prop, propPtr, 8);
if (prop[0] == OS.XA_FONT) {
/* Found it, prop[1] points to the string */
int ptr = OS.XmGetAtomName(xDisplay, prop[1]);
int length = OS.strlen(ptr);
byte[] nameBuf = new byte[length];
OS.memmove(nameBuf, ptr, length);
OS.XFree(ptr);
String xlfd = new String(Converter.mbcsToWcs(null, nameBuf)).toLowerCase();
int avg = 0;
try {
avg = FontData.motif_new(xlfd).averageWidth / 10;
} catch (Exception e) {
// leave avg unchanged so that it will be computed below
}
if (avg == 0) {
/*
* Not all fonts have average character width encoded
* in the xlfd. This one doesn't, so do it the hard
* way by averaging all the character widths.
*/
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width as the font's maximum width. So no
* averaging is required.
*/
averageCharWidth = fontStruct.max_bounds_width;
} else {
int sum = 0, count = 0;
int cols = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
XCharStruct struct = new XCharStruct();
for (int index = 0; index < cols; index++) {
OS.memmove(struct, perCharPtr + (index * XCharStruct.sizeof), XCharStruct.sizeof);
int w = struct.width;
if (w != 0) {
sum += w;
count++;
}
}
averageCharWidth += sum / count;
}
} else {
/* Average character width was in the xlfd */
averageCharWidth += avg;
}
numAverageCharWidth++;
break;
}
propPtr += 8;
}
} else {
/* FontList contains a fontSet */
int nFonts = OS.XFontsOfFontSet(fontPtr, fontStructPtr, fontNamePtr);
int [] fontStructs = new int[nFonts];
OS.memmove(fontStructs, fontStructPtr[0], nFonts * 4);
/* Go through each fontStruct in the font set */
for (int i = 0; i < nFonts; i++) {
OS.memmove(fontStruct, fontStructs[i], XFontStruct.sizeof);
ascent = Math.max(ascent, fontStruct.ascent);
descent = Math.max(descent, fontStruct.descent);
int fontHeight = fontStruct.ascent + fontStruct.descent;
height = Math.max(height, fontHeight);
/* Calculate average character width */
int propPtr = fontStruct.properties;
for (int j = 0; j < fontStruct.n_properties; j++) {
/* Look through properties for XAFONT */
int[] prop = new int[2];
OS.memmove(prop, propPtr, 8);
if (prop[0] == OS.XA_FONT) {
/* Found it, prop[1] points to the string */
int ptr = OS.XmGetAtomName(xDisplay, prop[1]);
int length = OS.strlen(ptr);
byte[] nameBuf = new byte[length];
OS.memmove(nameBuf, ptr, length);
OS.XFree(ptr);
String xlfd = new String(Converter.mbcsToWcs(null, nameBuf)).toLowerCase();
int avg = 0;
try {
avg = FontData.motif_new(xlfd).averageWidth / 10;
} catch (Exception e) {
/*
* Some font servers, for example, xfstt, do not pass
* reasonable font properties to the client, so we
* cannot construct a FontData for these. Use the font
* name instead.
*/
int[] fontName = new int[1];
OS.memmove(fontName, fontNamePtr [0] + (i * 4), 4);
ptr = fontName[0];
if (ptr != 0 ) {
length = OS.strlen(ptr);
nameBuf = new byte[length];
OS.memmove(nameBuf, ptr, length);
xlfd = new String(Converter.mbcsToWcs(null, nameBuf)).toLowerCase();
try {
avg = FontData.motif_new(xlfd).averageWidth / 10;
} catch (Exception ex) {
// leave avg unchanged (0) so that it will be computed below
}
}
}
if (avg == 0) {
/*
* Not all fonts have average character width encoded
* in the xlfd. This one doesn't, so do it the hard
* way by averaging all the character widths.
*/
int perCharPtr = fontStruct.per_char;
if (perCharPtr == 0) {
/*
* If perCharPtr is 0 then all glyphs in the font have
* the same width as the font's maximum width. So no
* averaging is required.
*/
averageCharWidth = fontStruct.max_bounds_width;
} else {
int sum = 0, count = 0;
int cols = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
XCharStruct struct = new XCharStruct();
for (int index = 0; index < cols; index++) {
OS.memmove(struct, perCharPtr + (index * XCharStruct.sizeof), XCharStruct.sizeof);
int w = struct.width;
if (w != 0) {
sum += w;
count++;
}
}
averageCharWidth += sum / count;
}
} else {
/* Average character width was in the xlfd */
averageCharWidth += avg;
}
numAverageCharWidth++;
break;
}
propPtr += 8;
}
}
}
}
OS.XmFontListFreeFontContext(context);
return FontMetrics.motif_new(ascent, descent, averageCharWidth / numAverageCharWidth, leading, height);
}
/**
* Returns the receiver's foreground color.
*
* @return the color used for drawing foreground things
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Color getForeground() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
XColor color = data.foreground;
if ((data.state & FOREGROUND_RGB) == 0) {
OS.XQueryColor(data.display, data.colormap, color);
data.state |= FOREGROUND_RGB;
}
return Color.motif_new(data.device, color);
}
/**
* Returns the foreground pattern. The default value is
* <code>null</code>.
*
* @return the receiver's foreground pattern
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see Pattern
*
* @since 3.1
*/
public Pattern getForegroundPattern() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.foregroundPattern;
}
/**
* Returns the GCData.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>GC</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @return the receiver's GCData
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see GCData
*
* @noreference This method is not intended to be referenced by clients.
*
* @since 3.2
*/
public GCData getGCData() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data;
}
/**
* Returns the receiver's interpolation setting, which will be one of
* <code>SWT.DEFAULT</code>, <code>SWT.NONE</code>,
* <code>SWT.LOW</code> or <code>SWT.HIGH</code>.
*
* @return the receiver's interpolation setting
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public int getInterpolation() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.interpolation;
}
/**
* Returns the receiver's line attributes.
*
* @return the line attributes used for drawing lines
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.3
*/
public LineAttributes getLineAttributes() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
float[] dashes = null;
if (data.lineDashes != null) {
dashes = new float[data.lineDashes.length];
System.arraycopy(data.lineDashes, 0, dashes, 0, dashes.length);
}
return new LineAttributes(data.lineWidth, data.lineCap, data.lineJoin, data.lineStyle, dashes, data.lineDashesOffset, data.lineMiterLimit);
}
/**
* Returns the receiver's line cap style, which will be one
* of the constants <code>SWT.CAP_FLAT</code>, <code>SWT.CAP_ROUND</code>,
* or <code>SWT.CAP_SQUARE</code>.
*
* @return the cap style used for drawing lines
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public int getLineCap() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.lineCap;
}
/**
* Returns the receiver's line dash style. The default value is
* <code>null</code>.
*
* @return the line dash style used for drawing lines
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public int[] getLineDash() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.lineDashes == null) return null;
int[] lineDashes = new int[data.lineDashes.length];
for (int i = 0; i < lineDashes.length; i++) {
lineDashes[i] = (int)data.lineDashes[i];
}
return lineDashes;
}
/**
* Returns the receiver's line join style, which will be one
* of the constants <code>SWT.JOIN_MITER</code>, <code>SWT.JOIN_ROUND</code>,
* or <code>SWT.JOIN_BEVEL</code>.
*
* @return the join style used for drawing lines
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public int getLineJoin() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.lineJoin;
}
/**
* Returns the receiver's line style, which will be one
* of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>,
* <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or
* <code>SWT.LINE_DASHDOTDOT</code>.
*
* @return the style used for drawing lines
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getLineStyle() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.lineStyle;
}
/**
* Returns the width that will be used when drawing lines
* for all of the figure drawing operations (that is,
* <code>drawLine</code>, <code>drawRectangle</code>,
* <code>drawPolyline</code>, and so forth.
*
* @return the receiver's line width
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public int getLineWidth() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return (int)data.lineWidth;
}
/**
* Returns the receiver's style information.
* <p>
* Note that the value which is returned by this method <em>may
* not match</em> the value which was provided to the constructor
* when the receiver was created. This can occur when the underlying
* operating system does not support a particular combination of
* requested styles.
* </p>
*
* @return the style bits
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 2.1.2
*/
public int getStyle () {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.style;
}
/**
* Returns the receiver's text drawing anti-aliasing setting value,
* which will be one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code> or
* <code>SWT.ON</code>. Note that this controls anti-aliasing
* <em>only</em> for text drawing operations.
*
* @return the anti-aliasing setting
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #getAntialias
*
* @since 3.1
*/
public int getTextAntialias() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.cairo == 0) return SWT.DEFAULT;
long /*int*/ options = Cairo.cairo_font_options_create();
Cairo.cairo_get_font_options(data.cairo, options);
int antialias = Cairo.cairo_font_options_get_antialias(options);
Cairo.cairo_font_options_destroy(options);
switch (antialias) {
case Cairo.CAIRO_ANTIALIAS_DEFAULT: return SWT.DEFAULT;
case Cairo.CAIRO_ANTIALIAS_NONE: return SWT.OFF;
case Cairo.CAIRO_ANTIALIAS_GRAY:
case Cairo.CAIRO_ANTIALIAS_SUBPIXEL: return SWT.ON;
}
return SWT.DEFAULT;
}
/**
* Sets the parameter to the transform that is currently being
* used by the receiver.
*
* @param transform the destination to copy the transform into
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see Transform
*
* @since 3.1
*/
public void getTransform(Transform transform) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (transform == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (transform.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
Cairo.cairo_get_matrix(cairo, transform.handle);
} else {
transform.setElements(1, 0, 0, 1, 0, 0);
}
}
/**
* Returns <code>true</code> if this GC is drawing in the mode
* where the resulting color in the destination is the
* <em>exclusive or</em> of the color values in the source
* and the destination, and <code>false</code> if it is
* drawing in the mode where the destination color is being
* replaced with the source color value.
*
* @return <code>true</code> true if the receiver is in XOR mode, and false otherwise
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public boolean getXORMode() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
XGCValues values = new XGCValues ();
OS.XGetGCValues (data.display, handle, OS.GCFunction, values);
return values.function == OS.GXxor;
}
/**
* Returns an integer hash code for the receiver. Any two
* objects that return <code>true</code> when passed to
* <code>equals</code> must return the same value for this
* method.
*
* @return the receiver's hash
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #equals
*/
public int hashCode () {
return handle;
}
void init(Drawable drawable, GCData data, int xGC) {
if (data.foreground != null) data.state &= ~(FOREGROUND | FOREGROUND_RGB);
if (data.background != null) data.state &= ~(BACKGROUND | BACKGROUND_BG | BACKGROUND_RGB);
if (data.font != null) data.state &= ~FONT;
Image image = data.image;
if (image != null) {
image.memGC = this;
/*
* The transparent pixel mask might change when drawing on
* the image. Destroy it so that it is regenerated when
* necessary.
*/
if (image.transparentPixel != -1) image.destroyMask();
}
this.drawable = drawable;
this.data = data;
handle = xGC;
}
void initCairo() {
data.device.checkCairo();
long /*int*/ cairo = data.cairo;
if (cairo != 0) return;
int xDisplay = data.display;
int xDrawable = data.drawable;
int xVisual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay));
int[] width = new int[1], height = new int[1], unused = new int[1];
OS.XGetGeometry(xDisplay, xDrawable, unused, unused, unused, width, height, unused, unused);
long /*int*/ surface = Cairo.cairo_xlib_surface_create(xDisplay, xDrawable, xVisual, width[0], height[0]);
if (surface == 0) SWT.error(SWT.ERROR_NO_HANDLES);
data.cairo = cairo = Cairo.cairo_create(surface);
Cairo.cairo_surface_destroy(surface);
if (cairo == 0) SWT.error(SWT.ERROR_NO_HANDLES);
Cairo.cairo_set_fill_rule(cairo, Cairo.CAIRO_FILL_RULE_EVEN_ODD);
data.state &= ~(BACKGROUND | FOREGROUND | FONT | LINE_WIDTH | LINE_CAP | LINE_JOIN | LINE_STYLE | DRAW_OFFSET);
setCairoClip(data.damageRgn, data.clipRgn);
}
/**
* Returns <code>true</code> if the receiver has a clipping
* region set into it, and <code>false</code> otherwise.
* If this method returns false, the receiver will draw on all
* available space in the destination. If it returns true,
* it will draw only in the area that is covered by the region
* that can be accessed with <code>getClipping(region)</code>.
*
* @return <code>true</code> if the GC has a clipping region, and <code>false</code> otherwise
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public boolean isClipped() {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
return data.clipRgn != 0;
}
/**
* Returns <code>true</code> if the GC has been disposed,
* and <code>false</code> otherwise.
* <p>
* This method gets the dispose state for the GC.
* When a GC has been disposed, it is an error to
* invoke any other method (except {@link #dispose()}) using the GC.
*
* @return <code>true</code> when the GC is disposed and <code>false</code> otherwise
*/
public boolean isDisposed() {
return handle == 0;
}
boolean isIdentity(double[] matrix) {
if (matrix == null) return true;
return matrix[0] == 1 && matrix[1] == 0 && matrix[2] == 0 && matrix[3] == 1 && matrix[4] == 0 && matrix[5] == 0;
}
/**
* Sets the receiver to always use the operating system's advanced graphics
* subsystem for all graphics operations if the argument is <code>true</code>.
* If the argument is <code>false</code>, the advanced graphics subsystem is
* no longer used, advanced graphics state is cleared and the normal graphics
* subsystem is used from now on.
* <p>
* Normally, the advanced graphics subsystem is invoked automatically when
* any one of the alpha, antialias, patterns, interpolation, paths, clipping
* or transformation operations in the receiver is requested. When the receiver
* is switched into advanced mode, the advanced graphics subsystem performs both
* advanced and normal graphics operations. Because the two subsystems are
* different, their output may differ. Switching to advanced graphics before
* any graphics operations are performed ensures that the output is consistent.
* </p><p>
* Advanced graphics may not be installed for the operating system. In this
* case, this operation does nothing. Some operating system have only one
* graphics subsystem, so switching from normal to advanced graphics does
* nothing. However, switching from advanced to normal graphics will always
* clear the advanced graphics state, even for operating systems that have
* only one graphics subsystem.
* </p>
*
* @param advanced the new advanced graphics state
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @see #setAlpha
* @see #setAntialias
* @see #setBackgroundPattern
* @see #setClipping(Path)
* @see #setForegroundPattern
* @see #setLineAttributes
* @see #setInterpolation
* @see #setTextAntialias
* @see #setTransform
* @see #getAdvanced
*
* @since 3.1
*/
public void setAdvanced(boolean advanced) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (advanced && data.cairo != 0) return;
if (advanced) {
try {
initCairo();
} catch (SWTException e) {}
} else {
long /*int*/ cairo = data.cairo;
if (cairo != 0) Cairo.cairo_destroy(cairo);
data.cairo = 0;
data.interpolation = SWT.DEFAULT;
data.backgroundPattern = data.foregroundPattern = null;
data.state = 0;
setClipping(0);
}
}
/**
* Sets the receiver's alpha value which must be
* between 0 (transparent) and 255 (opaque).
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
* @param alpha the alpha value
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see #getAdvanced
* @see #setAdvanced
*
* @since 3.1
*/
public void setAlpha(int alpha) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.cairo == 0 && (alpha & 0xff) == 0xff) return;
initCairo();
data.alpha = alpha & 0xff;
data.state &= ~(BACKGROUND | FOREGROUND | BACKGROUND_BG);
}
/**
* Sets the receiver's anti-aliasing value to the parameter,
* which must be one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code>
* or <code>SWT.ON</code>. Note that this controls anti-aliasing for all
* <em>non-text drawing</em> operations.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param antialias the anti-aliasing setting
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the parameter is not one of <code>SWT.DEFAULT</code>,
* <code>SWT.OFF</code> or <code>SWT.ON</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see #getAdvanced
* @see #setAdvanced
* @see #setTextAntialias
*
* @since 3.1
*/
public void setAntialias(int antialias) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.cairo == 0 && antialias == SWT.DEFAULT) return;
int mode = 0;
switch (antialias) {
case SWT.DEFAULT: mode = Cairo.CAIRO_ANTIALIAS_DEFAULT; break;
case SWT.OFF: mode = Cairo.CAIRO_ANTIALIAS_NONE; break;
case SWT.ON: mode = Cairo.CAIRO_ANTIALIAS_GRAY;
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
initCairo();
long /*int*/ cairo = data.cairo;
Cairo.cairo_set_antialias(cairo, mode);
}
/**
* Invokes platform specific functionality to allocate a new graphics context.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>GC</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @param drawable the Drawable for the receiver.
* @param data the data for the receiver.
*
* @return a new <code>GC</code>
*
* @noreference This method is not intended to be referenced by clients.
*/
public static GC motif_new(Drawable drawable, GCData data) {
GC gc = new GC();
int xGC = drawable.internal_new_GC(data);
gc.device = data.device;
gc.init(drawable, data, xGC);
return gc;
}
/**
* Invokes platform specific functionality to wrap a graphics context.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
* API for <code>GC</code>. It is marked public only so that it
* can be shared within the packages provided by SWT. It is not
* available on all platforms, and should never be called from
* application code.
* </p>
*
* @param xGC the X Windows graphics context.
* @param data the data for the receiver.
*
* @return a new <code>GC</code>
*
* @noreference This method is not intended to be referenced by clients.
*/
public static GC motif_new(int xGC, GCData data) {
GC gc = new GC();
gc.device = data.device;
gc.init(null, data, xGC);
return gc;
}
/**
* Sets the background color. The background color is used
* for fill operations and as the background color when text
* is drawn.
*
* @param color the new background color for the receiver
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the color is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setBackground (Color color) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
data.background = color.handle;
data.backgroundPattern = null;
data.state &= ~(BACKGROUND | BACKGROUND_BG);
data.state |= BACKGROUND_RGB;
}
/**
* Sets the background pattern. The default value is <code>null</code>.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param pattern the new background pattern
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see Pattern
* @see #getAdvanced
* @see #setAdvanced
*
* @since 3.1
*/
public void setBackgroundPattern(Pattern pattern) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (pattern != null && pattern.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (data.cairo == 0 && pattern == null) return;
initCairo();
if (data.backgroundPattern == pattern) return;
data.backgroundPattern = pattern;
data.state &= ~BACKGROUND;
}
static void setCairoFont(long /*int*/ cairo, Font font) {
//TODO - use X font instead of loading new one???
FontData[] fds = font.getFontData();
FontData fd = fds[0];
int style = fd.getStyle();
int slant = Cairo.CAIRO_FONT_SLANT_NORMAL;
if ((style & SWT.ITALIC) != 0) slant = Cairo.CAIRO_FONT_SLANT_ITALIC;
int weight = Cairo.CAIRO_FONT_WEIGHT_NORMAL;
if ((style & SWT.BOLD) != 0) weight = Cairo.CAIRO_FONT_WEIGHT_BOLD;
String name = fd.getName();
int index = name.indexOf('-');
if (index != -1) name = name.substring(index + 1);
byte[] buffer = Converter.wcsToMbcs(null, name, true);
Cairo.cairo_select_font_face(cairo, buffer, slant, weight);
Cairo.cairo_set_font_size(cairo, fd.getHeight());
}
static void setCairoRegion(long /*int*/ cairo, long /*int*/ rgn) {
//TODO - get rectangles from region instead of clip box
XRectangle rect = new XRectangle();
OS.XClipBox(rgn, rect);
Cairo.cairo_rectangle(cairo, rect.x, rect.y, rect.width, rect.height);
}
static void setCairoPatternColor(long /*int*/ pattern, int offset, Color c, int alpha) {
XColor color = c.handle;
double aa = (alpha & 0xFF) / (double)0xFF;
double red = ((color.red & 0xFFFF) / (double)0xFFFF);
double green = ((color.green & 0xFFFF) / (double)0xFFFF);
double blue = ((color.blue & 0xFFFF) / (double)0xFFFF);
Cairo.cairo_pattern_add_color_stop_rgba(pattern, offset, red, green, blue, aa);
}
void setCairoClip(long /*int*/ damageRgn, long /*int*/ clipRgn) {
long /*int*/ cairo = data.cairo;
Cairo.cairo_reset_clip(cairo);
if (damageRgn != 0) {
double[] matrix = new double[6];
Cairo.cairo_get_matrix(cairo, matrix);
Cairo.cairo_identity_matrix(cairo);
setCairoRegion(cairo, damageRgn);
Cairo.cairo_clip(cairo);
Cairo.cairo_set_matrix(cairo, matrix);
}
if (clipRgn != 0) {
setCairoRegion(cairo, clipRgn);
Cairo.cairo_clip(cairo);
}
}
void setClipping(int clipRgn) {
long /*int*/ cairo = data.cairo;
if (clipRgn == 0) {
if (data.clipRgn != 0) {
OS.XDestroyRegion (data.clipRgn);
data.clipRgn = 0;
}
if (cairo != 0) {
data.clippingTransform = null;
setCairoClip(data.damageRgn, 0);
} else {
if (data.damageRgn == 0) {
OS.XSetClipMask (data.display, handle, OS.None);
} else {
OS.XSetRegion (data.display, handle, data.damageRgn);
}
}
} else {
if (data.clipRgn == 0) data.clipRgn = OS.XCreateRegion ();
OS.XSubtractRegion (data.clipRgn, data.clipRgn, data.clipRgn);
OS.XUnionRegion (clipRgn, data.clipRgn, data.clipRgn);
if (cairo != 0) {
if (data.clippingTransform == null) data.clippingTransform = new double[6];
Cairo.cairo_get_matrix(cairo, data.clippingTransform);
setCairoClip(data.damageRgn, clipRgn);
} else {
int clipping = clipRgn;
if (data.damageRgn != 0) {
clipping = OS.XCreateRegion();
OS.XUnionRegion(clipping, clipRgn, clipping);
OS.XIntersectRegion(clipping, data.damageRgn, clipping);
}
OS.XSetRegion (data.display, handle, clipping);
if (clipping != clipRgn) OS.XDestroyRegion(clipping);
}
}
}
/**
* Sets the area of the receiver which can be changed
* by drawing operations to the rectangular area specified
* by the arguments.
*
* @param x the x coordinate of the clipping rectangle
* @param y the y coordinate of the clipping rectangle
* @param width the width of the clipping rectangle
* @param height the height of the clipping rectangle
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setClipping (int x, int y, int width, int height) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (width < 0) {
x = x + width;
width = -width;
}
if (height < 0) {
y = y + height;
height = -height;
}
XRectangle rect = new XRectangle ();
rect.x = (short) x;
rect.y = (short) y;
rect.width = (short) Math.max (0, width);
rect.height = (short) Math.max (0, height);
int clipRgn = OS.XCreateRegion();
OS.XUnionRectWithRegion(rect, clipRgn, clipRgn);
setClipping(clipRgn);
OS.XDestroyRegion(clipRgn);
}
/**
* Sets the area of the receiver which can be changed
* by drawing operations to the path specified
* by the argument.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param path the clipping path.
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the path has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see Path
* @see #getAdvanced
* @see #setAdvanced
*
* @since 3.1
*/
public void setClipping(Path path) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (path != null && path.isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
setClipping(0);
if (path != null) {
initCairo();
long /*int*/ cairo = data.cairo;
long /*int*/ copy = Cairo.cairo_copy_path(path.handle);
if (copy == 0) SWT.error(SWT.ERROR_NO_HANDLES);
Cairo.cairo_append_path(cairo, copy);
Cairo.cairo_path_destroy(copy);
Cairo.cairo_clip(cairo);
Cairo.cairo_new_path(cairo);
}
}
/**
* Sets the area of the receiver which can be changed
* by drawing operations to the rectangular area specified
* by the argument. Specifying <code>null</code> for the
* rectangle reverts the receiver's clipping area to its
* original value.
*
* @param rect the clipping rectangle or <code>null</code>
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setClipping (Rectangle rect) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (rect == null) {
setClipping(0);
} else {
setClipping (rect.x, rect.y, rect.width, rect.height);
}
}
/**
* Sets the area of the receiver which can be changed
* by drawing operations to the region specified
* by the argument. Specifying <code>null</code> for the
* region reverts the receiver's clipping area to its
* original value.
*
* @param region the clipping region or <code>null</code>
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the region has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setClipping (Region region) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (region != null && region.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
setClipping(region != null ? region.handle : 0);
}
/**
* Sets the receiver's fill rule to the parameter, which must be one of
* <code>SWT.FILL_EVEN_ODD</code> or <code>SWT.FILL_WINDING</code>.
*
* @param rule the new fill rule
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the rule is not one of <code>SWT.FILL_EVEN_ODD</code>
* or <code>SWT.FILL_WINDING</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public void setFillRule(int rule) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
int mode = OS.EvenOddRule, cairo_mode = Cairo.CAIRO_FILL_RULE_EVEN_ODD;
switch (rule) {
case SWT.FILL_WINDING:
mode = OS.WindingRule; cairo_mode = Cairo.CAIRO_FILL_RULE_WINDING; break;
case SWT.FILL_EVEN_ODD:
mode = OS.EvenOddRule; cairo_mode = Cairo.CAIRO_FILL_RULE_EVEN_ODD; break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
OS.XSetFillRule(data.display, handle, mode);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
Cairo.cairo_set_fill_rule(cairo, cairo_mode);
}
}
/**
* Sets the font which will be used by the receiver
* to draw and measure text to the argument. If the
* argument is null, then a default font appropriate
* for the platform will be used instead.
*
* @param font the new font for the receiver, or null to indicate a default font
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setFont (Font font) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (font != null && font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
data.font = font != null ? font : data.device.systemFont;
data.state &= ~FONT;
if (data.renderTable != 0) OS.XmRenderTableFree(data.renderTable);
data.renderTable = 0;
data.stringWidth = data.stringHeight = data.textWidth = data.textHeight = -1;
}
/**
* Sets the foreground color. The foreground color is used
* for drawing operations including when text is drawn.
*
* @param color the new foreground color for the receiver
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the color is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setForeground (Color color) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
data.foreground = color.handle;
data.foregroundPattern = null;
data.state &= ~FOREGROUND;
data.state |= FOREGROUND_RGB;
}
/**
* Sets the foreground pattern. The default value is <code>null</code>.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
* @param pattern the new foreground pattern
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see Pattern
* @see #getAdvanced
* @see #setAdvanced
*
* @since 3.1
*/
public void setForegroundPattern(Pattern pattern) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (pattern != null && pattern.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (data.cairo == 0 && pattern == null) return;
initCairo();
if (data.foregroundPattern == pattern) return;
data.foregroundPattern = pattern;
data.state &= ~FOREGROUND;
}
/**
* Sets the receiver's interpolation setting to the parameter, which
* must be one of <code>SWT.DEFAULT</code>, <code>SWT.NONE</code>,
* <code>SWT.LOW</code> or <code>SWT.HIGH</code>.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param interpolation the new interpolation setting
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the rule is not one of <code>SWT.DEFAULT</code>,
* <code>SWT.NONE</code>, <code>SWT.LOW</code> or <code>SWT.HIGH</code>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see #getAdvanced
* @see #setAdvanced
*
* @since 3.1
*/
public void setInterpolation(int interpolation) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.cairo == 0 && interpolation == SWT.DEFAULT) return;
switch (interpolation) {
case SWT.DEFAULT:
case SWT.NONE:
case SWT.LOW:
case SWT.HIGH:
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
initCairo();
data.interpolation = interpolation;
}
/**
* Sets the receiver's line attributes.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
* @param attributes the line attributes
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the attributes is null</li>
* <li>ERROR_INVALID_ARGUMENT - if any of the line attributes is not valid</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see LineAttributes
* @see #getAdvanced
* @see #setAdvanced
*
* @since 3.3
*/
public void setLineAttributes(LineAttributes attributes) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (attributes == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
int mask = 0;
float lineWidth = attributes.width;
if (lineWidth != data.lineWidth) {
mask |= LINE_WIDTH | DRAW_OFFSET;
}
int lineStyle = attributes.style;
if (lineStyle != data.lineStyle) {
mask |= LINE_STYLE;
switch (lineStyle) {
case SWT.LINE_SOLID:
case SWT.LINE_DASH:
case SWT.LINE_DOT:
case SWT.LINE_DASHDOT:
case SWT.LINE_DASHDOTDOT:
break;
case SWT.LINE_CUSTOM:
if (attributes.dash == null) lineStyle = SWT.LINE_SOLID;
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
}
int join = attributes.join;
if (join != data.lineJoin) {
mask |= LINE_JOIN;
switch (join) {
case SWT.JOIN_MITER:
case SWT.JOIN_ROUND:
case SWT.JOIN_BEVEL:
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
}
int cap = attributes.cap;
if (cap != data.lineCap) {
mask |= LINE_CAP;
switch (cap) {
case SWT.CAP_FLAT:
case SWT.CAP_ROUND:
case SWT.CAP_SQUARE:
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
}
float[] dashes = attributes.dash;
float[] lineDashes = data.lineDashes;
if (dashes != null && dashes.length > 0) {
boolean changed = lineDashes == null || lineDashes.length != dashes.length;
for (int i = 0; i < dashes.length; i++) {
float dash = dashes[i];
if (dash <= 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (!changed && lineDashes[i] != dash) changed = true;
}
if (changed) {
float[] newDashes = new float[dashes.length];
System.arraycopy(dashes, 0, newDashes, 0, dashes.length);
dashes = newDashes;
mask |= LINE_STYLE;
} else {
dashes = lineDashes;
}
} else {
if (lineDashes != null && lineDashes.length > 0) {
mask |= LINE_STYLE;
} else {
dashes = lineDashes;
}
}
float dashOffset = attributes.dashOffset;
if (dashOffset != data.lineDashesOffset) {
mask |= LINE_STYLE;
}
float miterLimit = attributes.miterLimit;
if (miterLimit != data.lineMiterLimit) {
mask |= LINE_MITERLIMIT;
}
initCairo();
if (mask == 0) return;
data.lineWidth = lineWidth;
data.lineStyle = lineStyle;
data.lineCap = cap;
data.lineJoin = join;
data.lineDashes = dashes;
data.lineDashesOffset = dashOffset;
data.lineMiterLimit = miterLimit;
data.state &= ~mask;
}
/**
* Sets the receiver's line cap style to the argument, which must be one
* of the constants <code>SWT.CAP_FLAT</code>, <code>SWT.CAP_ROUND</code>,
* or <code>SWT.CAP_SQUARE</code>.
*
* @param cap the cap style to be used for drawing lines
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public void setLineCap(int cap) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.lineCap == cap) return;
switch (cap) {
case SWT.CAP_ROUND:
case SWT.CAP_FLAT:
case SWT.CAP_SQUARE:
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
data.lineCap = cap;
data.state &= ~LINE_CAP;
}
/**
* Sets the receiver's line dash style to the argument. The default
* value is <code>null</code>. If the argument is not <code>null</code>,
* the receiver's line style is set to <code>SWT.LINE_CUSTOM</code>, otherwise
* it is set to <code>SWT.LINE_SOLID</code>.
*
* @param dashes the dash style to be used for drawing lines
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if any of the values in the array is less than or equal 0</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public void setLineDash(int[] dashes) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
float[] lineDashes = data.lineDashes;
if (dashes != null && dashes.length > 0) {
boolean changed = data.lineStyle != SWT.LINE_CUSTOM || lineDashes == null || lineDashes.length != dashes.length;
for (int i = 0; i < dashes.length; i++) {
int dash = dashes[i];
if (dash <= 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (!changed && lineDashes[i] != dash) changed = true;
}
if (!changed) return;
data.lineDashes = new float[dashes.length];
for (int i = 0; i < dashes.length; i++) {
data.lineDashes[i] = dashes[i];
}
data.lineStyle = SWT.LINE_CUSTOM;
} else {
if (data.lineStyle == SWT.LINE_SOLID && (lineDashes == null || lineDashes.length == 0)) return;
data.lineDashes = null;
data.lineStyle = SWT.LINE_SOLID;
}
data.state &= ~LINE_STYLE;
}
/**
* Sets the receiver's line join style to the argument, which must be one
* of the constants <code>SWT.JOIN_MITER</code>, <code>SWT.JOIN_ROUND</code>,
* or <code>SWT.JOIN_BEVEL</code>.
*
* @param join the join style to be used for drawing lines
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @since 3.1
*/
public void setLineJoin(int join) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.lineJoin == join) return;
switch (join) {
case SWT.JOIN_MITER:
case SWT.JOIN_ROUND:
case SWT.JOIN_BEVEL:
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
data.lineJoin = join;
data.state &= ~LINE_JOIN;
}
/**
* Sets the receiver's line style to the argument, which must be one
* of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>,
* <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or
* <code>SWT.LINE_DASHDOTDOT</code>.
*
* @param lineStyle the style to be used for drawing lines
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setLineStyle(int lineStyle) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.lineStyle == lineStyle) return;
switch (lineStyle) {
case SWT.LINE_SOLID:
case SWT.LINE_DASH:
case SWT.LINE_DOT:
case SWT.LINE_DASHDOT:
case SWT.LINE_DASHDOTDOT:
break;
case SWT.LINE_CUSTOM:
if (data.lineDashes == null) lineStyle = SWT.LINE_SOLID;
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
data.lineStyle = lineStyle;
data.state &= ~LINE_STYLE;
}
/**
* Sets the width that will be used when drawing lines
* for all of the figure drawing operations (that is,
* <code>drawLine</code>, <code>drawRectangle</code>,
* <code>drawPolyline</code>, and so forth.
* <p>
* Note that line width of zero is used as a hint to
* indicate that the fastest possible line drawing
* algorithms should be used. This means that the
* output may be different from line width one.
* </p>
*
* @param lineWidth the width of a line
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public void setLineWidth(int lineWidth) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.lineWidth == lineWidth) return;
data.lineWidth = lineWidth;
data.state &= ~(LINE_WIDTH | DRAW_OFFSET);
}
void setString(String string) {
if (string == data.string) return;
if (data.xmString != 0) OS.XmStringFree(data.xmString);
byte[] buffer = Converter.wcsToMbcs(getCodePage (), string, true);
data.xmString = OS.XmStringCreate(buffer, OS.XmFONTLIST_DEFAULT_TAG);
data.string = string;
data.stringWidth = data.stringHeight = -1;
}
void setText(String string, int flags) {
if (data.renderTable == 0) createRenderTable();
if (string == data.text && (flags & ~SWT.DRAW_TRANSPARENT) == (data.drawFlags & ~SWT.DRAW_TRANSPARENT)) {
return;
}
if (data.xmText != 0) OS.XmStringFree(data.xmText);
if (data.xmMnemonic != 0) OS.XmStringFree(data.xmMnemonic);
char mnemonic = 0;
int tableLength = 0;
Device device = data.device;
int[] parseTable = new int[2];
char[] text = new char[string.length()];
string.getChars(0, text.length, text, 0);
if ((flags & SWT.DRAW_DELIMITER) != 0) parseTable[tableLength++] = device.crMapping;
if ((flags & SWT.DRAW_TAB) != 0) parseTable[tableLength++] = device.tabMapping;
if ((flags & SWT.DRAW_MNEMONIC) != 0) mnemonic = fixMnemonic(text);
String codePage = getCodePage();
byte[] buffer = Converter.wcsToMbcs(codePage, text, true);
data.xmText = OS.XmStringParseText(buffer, 0, OS.XmFONTLIST_DEFAULT_TAG, OS.XmCHARSET_TEXT, parseTable, tableLength, 0);
if (mnemonic != 0) {
byte [] buffer1 = Converter.wcsToMbcs(codePage, new char[]{mnemonic}, true);
data.xmMnemonic = OS.XmStringCreate (buffer1, OS.XmFONTLIST_DEFAULT_TAG);
} else {
data.xmMnemonic = 0;
}
data.text = string;
data.textWidth = data.textHeight = -1;
data.drawFlags = flags;
}
/**
* Sets the receiver's text anti-aliasing value to the parameter,
* which must be one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code>
* or <code>SWT.ON</code>. Note that this controls anti-aliasing only
* for all <em>text drawing</em> operations.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param antialias the anti-aliasing setting
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the parameter is not one of <code>SWT.DEFAULT</code>,
* <code>SWT.OFF</code> or <code>SWT.ON</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see #getAdvanced
* @see #setAdvanced
* @see #setAntialias
*
* @since 3.1
*/
public void setTextAntialias(int antialias) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (data.cairo == 0 && antialias == SWT.DEFAULT) return;
int mode = 0;
switch (antialias) {
case SWT.DEFAULT: mode = Cairo.CAIRO_ANTIALIAS_DEFAULT; break;
case SWT.OFF: mode = Cairo.CAIRO_ANTIALIAS_NONE; break;
case SWT.ON: mode = Cairo.CAIRO_ANTIALIAS_GRAY;
break;
default:
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
initCairo();
long /*int*/ options = Cairo.cairo_font_options_create();
Cairo.cairo_font_options_set_antialias(options, mode);
Cairo.cairo_set_font_options(data.cairo, options);
Cairo.cairo_font_options_destroy(options);
}
/**
* Sets the transform that is currently being used by the receiver. If
* the argument is <code>null</code>, the current transform is set to
* the identity transform.
* <p>
* This operation requires the operating system's advanced
* graphics subsystem which may not be available on some
* platforms.
* </p>
*
* @param transform the transform to set
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
* </ul>
*
* @see Transform
* @see #getAdvanced
* @see #setAdvanced
*
* @since 3.1
*/
public void setTransform(Transform transform) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (transform != null && transform.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
if (data.cairo == 0 && transform == null) return;
initCairo();
long /*int*/ cairo = data.cairo;
if (transform != null) {
Cairo.cairo_set_matrix(cairo, transform.handle);
} else {
Cairo.cairo_identity_matrix(cairo);
}
data.state &= ~DRAW_OFFSET;
}
/**
* If the argument is <code>true</code>, puts the receiver
* in a drawing mode where the resulting color in the destination
* is the <em>exclusive or</em> of the color values in the source
* and the destination, and if the argument is <code>false</code>,
* puts the receiver in a drawing mode where the destination color
* is replaced with the source color value.
* <p>
* Note that this mode in fundamentally unsupportable on certain
* platforms, notably Carbon (Mac OS X). Clients that want their
* code to run on all platforms need to avoid this method.
* </p>
*
* @param xor if <code>true</code>, then <em>xor</em> mode is used, otherwise <em>source copy</em> mode is used
*
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*
* @deprecated this functionality is not supported on some platforms
*/
public void setXORMode(boolean xor) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
OS.XSetFunction(data.display, handle, xor ? OS.GXxor : OS.GXcopy);
}
/**
* Returns the extent of the given string. No tab
* expansion or carriage return processing will be performed.
* <p>
* The <em>extent</em> of a string is the width and height of
* the rectangular area it would cover if drawn in a particular
* font (in this case, the current font in the receiver).
* </p>
*
* @param string the string to measure
* @return a point containing the extent of the string
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Point stringExtent(String string) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
checkGC(FONT);
byte[] buffer = Converter.wcsToMbcs(null, string, true);
cairo_font_extents_t font_extents = new cairo_font_extents_t();
Cairo.cairo_font_extents(cairo, font_extents);
cairo_text_extents_t extents = new cairo_text_extents_t();
Cairo.cairo_text_extents(cairo, buffer, extents);
return new Point((int)extents.width, (int)font_extents.height);
}
setString(string);
checkGC(FONT);
if (data.stringWidth != -1) return new Point(data.stringWidth, data.stringHeight);
int width, height;
if (string.length() == 0) {
width = 0;
height = getFontHeight();
} else {
int fontList = data.font.handle;
int xmString = data.xmString;
width = OS.XmStringWidth(fontList, xmString);
height = OS.XmStringHeight(fontList, xmString);
}
return new Point(data.stringWidth = width, data.stringHeight = height);
}
/**
* Returns the extent of the given string. Tab expansion and
* carriage return processing are performed.
* <p>
* The <em>extent</em> of a string is the width and height of
* the rectangular area it would cover if drawn in a particular
* font (in this case, the current font in the receiver).
* </p>
*
* @param string the string to measure
* @return a point containing the extent of the string
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Point textExtent(String string) {
return textExtent(string, SWT.DRAW_DELIMITER | SWT.DRAW_TAB);
}
/**
* Returns the extent of the given string. Tab expansion, line
* delimiter and mnemonic processing are performed according to
* the specified flags, which can be a combination of:
* <dl>
* <dt><b>DRAW_DELIMITER</b></dt>
* <dd>draw multiple lines</dd>
* <dt><b>DRAW_TAB</b></dt>
* <dd>expand tabs</dd>
* <dt><b>DRAW_MNEMONIC</b></dt>
* <dd>underline the mnemonic character</dd>
* <dt><b>DRAW_TRANSPARENT</b></dt>
* <dd>transparent background</dd>
* </dl>
* <p>
* The <em>extent</em> of a string is the width and height of
* the rectangular area it would cover if drawn in a particular
* font (in this case, the current font in the receiver).
* </p>
*
* @param string the string to measure
* @param flags the flags specifying how to process the text
* @return a point containing the extent of the string
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Point textExtent(String string, int flags) {
if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
long /*int*/ cairo = data.cairo;
if (cairo != 0) {
//TODO - honor flags
checkGC(FONT);
byte[] buffer = Converter.wcsToMbcs(null, string, true);
cairo_font_extents_t font_extents = new cairo_font_extents_t();
Cairo.cairo_font_extents(cairo, font_extents);
cairo_text_extents_t extents = new cairo_text_extents_t();
Cairo.cairo_text_extents(cairo, buffer, extents);
return new Point((int)extents.width, (int)font_extents.height);
}
setText(string, flags);
checkGC(FONT);
if (data.textWidth != -1) return new Point(data.textWidth, data.textHeight);
int width, height;
if (string.length() == 0) {
width = 0;
height = getFontHeight();
} else {
int fontList = data.font.handle;
int xmText = data.xmText;
width = OS.XmStringWidth(fontList, xmText);
height = OS.XmStringHeight(fontList, xmText);
}
return new Point(data.textWidth = width, data.textHeight = height);
}
/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the receiver
*/
public String toString () {
if (isDisposed()) return "GC {*DISPOSED*}";
return "GC {" + handle + "}";
}
}