/**
* Copyright 2008 - 2015 The Loon Game Engine Authors
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*
* @project loon
* @author cping
* @email：javachenpeng@yahoo.com
* @version 0.5
*/
package loon.canvas;
import loon.Graphics;
import loon.LRelease;
import loon.LTexture;
import loon.canvas.Paint.Style;
import loon.font.LFont;
import loon.font.TextLayout;
public abstract class Canvas implements LRelease {
protected LFont _font;
public static enum Composite {
SRC,
DST_ATOP,
SRC_OVER,
DST_OVER,
SRC_IN,
DST_IN,
SRC_OUT,
DST_OUT,
SRC_ATOP,
XOR,
MULTIPLY
}
public static enum LineCap {
BUTT, ROUND, SQUARE
}
public static enum LineJoin {
BEVEL, MITER, ROUND
}
public interface Drawable {
float width();
float height();
void draw(Object gc, float x, float y, float width, float height);
void draw(Object gc, float dx, float dy, float dw, float dh, float sx,
float sy, float sw, float sh);
}
public final Image image;
public final float width;
public final float height;
public abstract Image snapshot();
@Override
public void close() {
}
public abstract Canvas clear();
public abstract Canvas clearRect(float x, float y, float width, float height);
public abstract Canvas clip(Path clipPath);
public abstract Canvas clipRect(float x, float y, float width, float height);
public abstract Path createPath();
public abstract Gradient createGradient(Gradient.Config config);
public Canvas rect(float x, float y, float w, float h, Paint paint) {
if (paint == null) {
fillRect(x, y, w, h);
} else {
int tmp = getStrokeColor();
setStrokeWidth(paint.strokeWidth);
int fill = getFillColor();
int stroke = getStrokeColor();
Style style = paint.style;
switch (style) {
case FILL:
setFillColor(paint.color);
fillRect(x, y, w, h);
break;
case STROKE:
setStrokeColor(paint.color);
strokeRect(x, y, w, h);
break;
case FILL_AND_STROKE:
setFillColor(paint.color);
setStrokeColor(paint.color);
fillRect(x, y, w, h);
strokeRect(x, y, w, h);
break;
}
setFillColor(fill);
setStrokeColor(stroke);
setStrokeWidth(tmp);
}
return this;
}
public Canvas draw(Drawable image, float x, float y) {
return draw(image, x, y, image.width(), image.height());
}
public Canvas drawCentered(Drawable image, float x, float y) {
return draw(image, x - image.width() / 2, y - image.height() / 2);
}
public Canvas draw(Drawable image, float x, float y, float w, float h) {
image.draw(gc(), x, y, w, h);
isDirty = true;
return this;
}
public Canvas draw(Drawable image, float dx, float dy, float dw, float dh,
float sx, float sy, float sw, float sh) {
image.draw(gc(), dx, dy, dw, dh, sx, sy, sw, sh);
isDirty = true;
return this;
}
public abstract Canvas drawLine(float x0, float y0, float x1, float y1);
public abstract Canvas drawPoint(float x, float y);
public abstract Canvas drawText(String text, float x, float y);
public Canvas drawText(String message, float x, float y, int c1, int c2) {
int tmp = getFillColor();
setFillColor(c1);
drawText(message, x + 1, y);
drawText(message, x - 1, y);
drawText(message, x, y + 1);
drawText(message, x, y - 1);
setFillColor(c2);
drawText(message, x, y);
setFillColor(tmp);
return this;
}
public Canvas drawText(String message, float x, float y, LColor c1,
LColor c2) {
int tmp = getFillColor();
setColor(c1);
drawText(message, x + 1, y);
drawText(message, x - 1, y);
drawText(message, x, y + 1);
drawText(message, x, y - 1);
setColor(c2);
drawText(message, x, y);
setFillColor(tmp);
return this;
}
public abstract Canvas fillCircle(float x, float y, float radius);
public abstract Canvas fillPath(Path path);
public abstract Canvas fillRect(float x, float y, float width, float height);
public abstract Canvas fillRoundRect(float x, float y, float width,
float height, float radius);
public abstract Canvas fillText(TextLayout text, float x, float y);
public abstract Canvas restore();
public abstract Canvas rotate(float radians);
public abstract Canvas save();
public abstract Canvas scale(float x, float y);
public abstract Canvas setAlpha(float alpha);
public abstract Canvas setCompositeOperation(Composite composite);
public abstract Canvas setFillColor(int color);
public abstract Canvas setColor(LColor color);
public abstract int getStrokeColor();
public abstract int getFillColor();
public abstract Canvas setColor(int r, int g, int b);
public abstract Canvas setColor(int r, int g, int b, int a);
public abstract Canvas setFillGradient(Gradient gradient);
public abstract Canvas setFillPattern(Pattern pattern);
public abstract Canvas setLineCap(LineCap cap);
public abstract Canvas setLineJoin(LineJoin join);
public abstract Canvas setMiterLimit(float miter);
public abstract Canvas setStrokeColor(int color);
public abstract Canvas setStrokeWidth(float strokeWidth);
public abstract Canvas strokeCircle(float x, float y, float radius);
public abstract Canvas strokePath(Path path);
public abstract Canvas strokeRect(float x, float y, float width,
float height);
public abstract Canvas strokeRoundRect(float x, float y, float width,
float height, float radius);
public abstract Canvas strokeText(TextLayout text, float x, float y);
public LTexture toTexture() {
return toTexture(LTexture.Format.LINEAR);
}
public LTexture toTexture(LTexture.Format config) {
try {
return image.createTexture(config);
} finally {
close();
}
}
public abstract Canvas transform(float m11, float m12, float m21,
float m22, float dx, float dy);
public abstract Canvas translate(float x, float y);
protected boolean isDirty;
protected final Graphics gfx;
protected Canvas(Graphics gfx, Image image) {
this.gfx = gfx;
this.image = image;
if (this.image != null) {
this.image.canvas = this;
}
this.width = image.width();
this.height = image.height();
if (width <= 0 || height <= 0) {
throw new IllegalArgumentException(
"Canvas must be > 0 in width and height: " + width + "x"
+ height);
}
}
protected abstract Object gc();
public LFont getFont() {
return _font;
}
public Canvas setFont(LFont font) {
this._font = font;
return this;
}
}