michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.gfx;
michael@0: 
michael@0: import org.mozilla.gecko.mozglue.DirectBufferAllocator;
michael@0: 
michael@0: import android.graphics.Bitmap;
michael@0: import android.util.Log;
michael@0: 
michael@0: import java.nio.ByteBuffer;
michael@0: 
michael@0: /** A Cairo image that simply saves a buffer of pixel data. */
michael@0: public class BufferedCairoImage extends CairoImage {
michael@0:     private ByteBuffer mBuffer;
michael@0:     private IntSize mSize;
michael@0:     private int mFormat;
michael@0: 
michael@0:     private static String LOGTAG = "GeckoBufferedCairoImage";
michael@0: 
michael@0:     /** Creates a buffered Cairo image from a byte buffer. */
michael@0:     public BufferedCairoImage(ByteBuffer inBuffer, int inWidth, int inHeight, int inFormat) {
michael@0:         setBuffer(inBuffer, inWidth, inHeight, inFormat);
michael@0:     }
michael@0: 
michael@0:     /** Creates a buffered Cairo image from an Android bitmap. */
michael@0:     public BufferedCairoImage(Bitmap bitmap) {
michael@0:         setBitmap(bitmap);
michael@0:     }
michael@0: 
michael@0:     private synchronized void freeBuffer() {
michael@0:         mBuffer = DirectBufferAllocator.free(mBuffer);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void destroy() {
michael@0:         try {
michael@0:             freeBuffer();
michael@0:         } catch (Exception ex) {
michael@0:             Log.e(LOGTAG, "error clearing buffer: ", ex);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public ByteBuffer getBuffer() { return mBuffer; }
michael@0:     @Override
michael@0:     public IntSize getSize() { return mSize; }
michael@0:     @Override
michael@0:     public int getFormat() { return mFormat; }
michael@0: 
michael@0: 
michael@0:     public void setBuffer(ByteBuffer buffer, int width, int height, int format) {
michael@0:         freeBuffer();
michael@0:         mBuffer = buffer;
michael@0:         mSize = new IntSize(width, height);
michael@0:         mFormat = format;
michael@0:     }
michael@0: 
michael@0:     public void setBitmap(Bitmap bitmap) {
michael@0:         mFormat = CairoUtils.bitmapConfigToCairoFormat(bitmap.getConfig());
michael@0:         mSize = new IntSize(bitmap.getWidth(), bitmap.getHeight());
michael@0: 
michael@0:         int bpp = CairoUtils.bitsPerPixelForCairoFormat(mFormat);
michael@0:         mBuffer = DirectBufferAllocator.allocate(mSize.getArea() * bpp);
michael@0:         bitmap.copyPixelsToBuffer(mBuffer.asIntBuffer());
michael@0:     }
michael@0: }