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72 lines
2.2 KiB
Java
72 lines
2.2 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.GeckoAppShell;
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import org.mozilla.gecko.gfx.CairoImage;
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import org.mozilla.gecko.gfx.CairoUtils;
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import android.graphics.Bitmap;
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import java.nio.ByteBuffer;
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/** A Cairo image that simply saves a buffer of pixel data. */
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public class BufferedCairoImage extends CairoImage {
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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 boolean mNeedToFreeBuffer;
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/** Creates a buffered Cairo image from a byte buffer. */
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public BufferedCairoImage(ByteBuffer inBuffer, int inWidth, int inHeight, int inFormat) {
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setBuffer(inBuffer, inWidth, inHeight, inFormat);
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}
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/** Creates a buffered Cairo image from an Android bitmap. */
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public BufferedCairoImage(Bitmap bitmap) {
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setBitmap(bitmap);
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}
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private void freeBuffer() {
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if (mNeedToFreeBuffer && mBuffer != null)
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GeckoAppShell.freeDirectBuffer(mBuffer);
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mNeedToFreeBuffer = false;
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mBuffer = null;
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}
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protected void finalize() throws Throwable {
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try {
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freeBuffer();
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} finally {
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super.finalize();
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}
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}
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@Override
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public ByteBuffer getBuffer() { return mBuffer; }
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@Override
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public IntSize getSize() { return mSize; }
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@Override
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public int getFormat() { return mFormat; }
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public void setBuffer(ByteBuffer buffer, int width, int height, int format) {
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freeBuffer();
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mBuffer = buffer;
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mSize = new IntSize(width, height);
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mFormat = format;
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}
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public void setBitmap(Bitmap bitmap) {
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mFormat = CairoUtils.bitmapConfigToCairoFormat(bitmap.getConfig());
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mSize = new IntSize(bitmap.getWidth(), bitmap.getHeight());
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mNeedToFreeBuffer = true;
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int bpp = CairoUtils.bitsPerPixelForCairoFormat(mFormat);
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mBuffer = GeckoAppShell.allocateDirectBuffer(mSize.getArea() * bpp);
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bitmap.copyPixelsToBuffer(mBuffer.asIntBuffer());
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}
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}
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