gecko/mobile/android/base/gfx/BufferedCairoImage.java
2012-10-22 10:15:35 -04:00

71 lines
2.1 KiB
Java

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