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71de338bfd
These methods are only used from the constructors.
86 lines
2.8 KiB
Java
86 lines
2.8 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko.gfx;
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import org.mozilla.gecko.mozglue.DirectBufferAllocator;
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import android.graphics.Bitmap;
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import android.util.Log;
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import java.nio.ByteBuffer;
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/** A buffered image that simply saves a buffer of pixel data. */
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public class BufferedImage {
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private ByteBuffer mBuffer;
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private IntSize mSize;
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private int mFormat;
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private static final String LOGTAG = "GeckoBufferedImage";
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/** Creates an empty buffered image */
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public BufferedImage() {
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mSize = new IntSize(0, 0);
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}
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/** Creates a buffered image from an Android bitmap. */
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public BufferedImage(Bitmap bitmap) {
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mFormat = bitmapConfigToFormat(bitmap.getConfig());
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mSize = new IntSize(bitmap.getWidth(), bitmap.getHeight());
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int bpp = bitsPerPixelForFormat(mFormat);
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mBuffer = DirectBufferAllocator.allocate(mSize.getArea() * bpp);
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bitmap.copyPixelsToBuffer(mBuffer.asIntBuffer());
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}
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private synchronized void freeBuffer() {
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mBuffer = DirectBufferAllocator.free(mBuffer);
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}
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public void destroy() {
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try {
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freeBuffer();
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} catch (Exception ex) {
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Log.e(LOGTAG, "error clearing buffer: ", ex);
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}
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}
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public ByteBuffer getBuffer() { return mBuffer; }
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public IntSize getSize() { return mSize; }
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public int getFormat() { return mFormat; }
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public static final int FORMAT_INVALID = -1;
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public static final int FORMAT_ARGB32 = 0;
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public static final int FORMAT_RGB24 = 1;
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public static final int FORMAT_A8 = 2;
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public static final int FORMAT_A1 = 3;
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public static final int FORMAT_RGB16_565 = 4;
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private static int bitsPerPixelForFormat(int format) {
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switch (format) {
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case FORMAT_A1: return 1;
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case FORMAT_A8: return 8;
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case FORMAT_RGB16_565: return 16;
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case FORMAT_RGB24: return 24;
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case FORMAT_ARGB32: return 32;
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default:
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throw new RuntimeException("Unknown Cairo format");
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}
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}
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private static int bitmapConfigToFormat(Bitmap.Config config) {
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if (config == null)
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return FORMAT_ARGB32; /* Droid Pro fix. */
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switch (config) {
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case ALPHA_8: return FORMAT_A8;
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case ARGB_4444: throw new RuntimeException("ARGB_444 unsupported");
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case ARGB_8888: return FORMAT_ARGB32;
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case RGB_565: return FORMAT_RGB16_565;
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default: throw new RuntimeException("Unknown Skia bitmap config");
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}
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}
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}
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