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/* -*- 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 buffered image that simply saves a buffer of pixel data. */
public class BufferedImage {
private ByteBuffer mBuffer;
private Bitmap mBitmap;
private IntSize mSize;
private int mFormat;
private static final String LOGTAG = "GeckoBufferedImage";
/** Creates an empty buffered image */
public BufferedImage() {
mSize = new IntSize(0, 0);
}
/** Creates a buffered image from an Android bitmap. */
public BufferedImage(Bitmap bitmap) {
mFormat = bitmapConfigToFormat(bitmap.getConfig());
mSize = new IntSize(bitmap.getWidth(), bitmap.getHeight());
mBitmap = bitmap;
}
private synchronized void freeBuffer() {
if (mBuffer != null) {
mBuffer = DirectBufferAllocator.free(mBuffer);
}
}
public void destroy() {
try {
freeBuffer();
} catch (Exception ex) {
Log.e(LOGTAG, "error clearing buffer: ", ex);
}
}
public ByteBuffer getBuffer() {
if (mBuffer == null) {
int bpp = bitsPerPixelForFormat(mFormat);
mBuffer = DirectBufferAllocator.allocate(mSize.getArea() * bpp);
mBitmap.copyPixelsToBuffer(mBuffer.asIntBuffer());
mBitmap = null;
}
return mBuffer;
}
public IntSize getSize() { return mSize; }
public int getFormat() { return mFormat; }
public static final int FORMAT_INVALID = -1;
public static final int FORMAT_ARGB32 = 0;
public static final int FORMAT_RGB24 = 1;
public static final int FORMAT_A8 = 2;
public static final int FORMAT_A1 = 3;
public static final int FORMAT_RGB16_565 = 4;
private static int bitsPerPixelForFormat(int format) {
switch (format) {
case FORMAT_A1: return 1;
case FORMAT_A8: return 8;
case FORMAT_RGB16_565: return 16;
case FORMAT_RGB24: return 24;
case FORMAT_ARGB32: return 32;
default:
throw new RuntimeException("Unknown Cairo format");
}
}
private static int bitmapConfigToFormat(Bitmap.Config config) {
if (config == null)
return FORMAT_ARGB32; /* Droid Pro fix. */
switch (config) {
case ALPHA_8: return FORMAT_A8;
case ARGB_4444: throw new RuntimeException("ARGB_444 unsupported");
case ARGB_8888: return FORMAT_ARGB32;
case RGB_565: return FORMAT_RGB16_565;
default: throw new RuntimeException("Unknown Skia bitmap config");
}
}
}
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