GPUImageView.java

/*
 * Copyright (C) 2012 CyberAgent
 *
 * 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.
 */

package jp.co.cyberagent.android.gpuimage;

import android.content.Context;
import android.graphics.Bitmap;
import android.net.Uri;
import android.opengl.GLSurfaceView;
import android.util.AttributeSet;

import java.io.File;

public class GPUImageView extends GLSurfaceView {

    private GPUImage mGPUImage;
    private GPUImageFilter mFilter;
    private float mRatio = 0.0f;

    public GPUImageView(Context context) {
        super(context);
        init();
    }

    public GPUImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        mGPUImage = new GPUImage(getContext());
        mGPUImage.setGLSurfaceView(this);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (mRatio == 0.0f) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        } else {
            int width = MeasureSpec.getSize(widthMeasureSpec);
            int height = MeasureSpec.getSize(heightMeasureSpec);

            int newHeight;
            int newWidth;
            if (width / mRatio < height) {
                newWidth = width;
                newHeight = Math.round(width / mRatio);
            } else {
                newHeight = height;
                newWidth = Math.round(height * mRatio);
            }

            int newWidthSpec = MeasureSpec.makeMeasureSpec(newWidth, MeasureSpec.EXACTLY);
            int newHeightSpec = MeasureSpec.makeMeasureSpec(newHeight, MeasureSpec.EXACTLY);
            super.onMeasure(newWidthSpec, newHeightSpec);
        }
    }

    // TODO Should be an xml attribute. But then GPUImage can not be distributed as .jar anymore.
    public void setRatio(float ratio) {
        mRatio = ratio;
        requestLayout();
        mGPUImage.deleteImage();
    }

    /**
     * Set the filter to be applied on the image.
     *
     * @param filter Filter that should be applied on the image.
     */
    public void setFilter(GPUImageFilter filter) {
        mFilter = filter;
        mGPUImage.setFilter(filter);
        requestRender();
    }

    /**
     * Get the current applied filter.
     *
     * @return the current filter
     */
    public GPUImageFilter getFilter() {
        return mFilter;
    }

    /**
     * Sets the image on which the filter should be applied.
     *
     * @param bitmap the new image
     */
    public void setImage(final Bitmap bitmap) {
        mGPUImage.setImage(bitmap);
    }

    /**
     * Sets the image on which the filter should be applied from a Uri.
     *
     * @param uri the uri of the new image
     */
    public void setImage(final Uri uri) {
        mGPUImage.setImage(uri);
    }

    /**
     * Sets the image on which the filter should be applied from a File.
     *
     * @param file the file of the new image
     */
    public void setImage(final File file) {
        mGPUImage.setImage(file);
    }

    /**
     * Save current image with applied filter to Pictures. It will be stored on
     * the default Picture folder on the phone below the given folerName and
     * fileName. <br />
     * This method is async and will notify when the image was saved through the
     * listener.
     *
     * @param folderName the folder name
     * @param fileName the file name
     * @param listener the listener
     */
    public void saveToPictures(final String folderName, final String fileName,
                               final GPUImage.OnPictureSavedListener listener) {
        mGPUImage.saveToPictures(folderName, fileName, listener);
    }
}