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219 lines
8.1 KiB
Java
219 lines
8.1 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Android code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2009-2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Patrick Walton <pcwalton@mozilla.com>
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* Arkady Blyakher <rkadyb@mit.edu>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.gecko.gfx;
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import android.graphics.Point;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.Region;
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import android.opengl.GLES20;
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import android.util.Log;
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import java.nio.Buffer;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.FloatBuffer;
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/**
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* Base class for tile layers, which encapsulate the logic needed to draw textured tiles in OpenGL
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* ES.
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*/
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public abstract class TileLayer extends Layer {
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private static final String LOGTAG = "GeckoTileLayer";
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private final Rect mDirtyRect;
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private IntSize mSize;
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private int[] mTextureIDs;
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protected final CairoImage mImage;
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public enum PaintMode { NORMAL, REPEAT, STRETCH };
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private PaintMode mPaintMode;
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public TileLayer(CairoImage image, PaintMode paintMode) {
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super(image.getSize());
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mPaintMode = paintMode;
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mImage = image;
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mSize = new IntSize(0, 0);
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mDirtyRect = new Rect();
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}
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protected boolean repeats() { return mPaintMode == PaintMode.REPEAT; }
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protected boolean stretches() { return mPaintMode == PaintMode.STRETCH; }
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protected int getTextureID() { return mTextureIDs[0]; }
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protected boolean initialized() { return mImage != null && mTextureIDs != null; }
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@Override
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protected void finalize() throws Throwable {
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if (mTextureIDs != null)
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TextureReaper.get().add(mTextureIDs);
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}
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public void setPaintMode(PaintMode mode) {
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mPaintMode = mode;
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}
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/**
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* Invalidates the entire buffer so that it will be uploaded again. Only valid inside a
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* transaction.
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*/
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public void invalidate() {
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if (!inTransaction())
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throw new RuntimeException("invalidate() is only valid inside a transaction");
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IntSize bufferSize = mImage.getSize();
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mDirtyRect.set(0, 0, bufferSize.width, bufferSize.height);
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}
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private void validateTexture() {
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/* Calculate the ideal texture size. This must be a power of two if
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* the texture is repeated or OpenGL ES 2.0 isn't supported, as
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* OpenGL ES 2.0 is required for NPOT texture support (without
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* extensions), but doesn't support repeating NPOT textures.
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*
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* XXX Currently, we don't pick a GLES 2.0 context, so always round.
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*/
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IntSize textureSize = mImage.getSize().nextPowerOfTwo();
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if (!textureSize.equals(mSize)) {
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mSize = textureSize;
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// Delete the old texture
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if (mTextureIDs != null) {
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TextureReaper.get().add(mTextureIDs);
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mTextureIDs = null;
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// Free the texture immediately, so we don't incur a
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// temporarily increased memory usage.
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TextureReaper.get().reap();
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}
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}
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}
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@Override
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protected void performUpdates(RenderContext context) {
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super.performUpdates(context);
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// Reallocate the texture if the size has changed
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validateTexture();
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// Don't do any work if the image has an invalid size.
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if (!mImage.getSize().isPositive())
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return;
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// If we haven't allocated a texture, assume the whole region is dirty
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if (mTextureIDs == null) {
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uploadFullTexture();
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} else {
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uploadDirtyRect(mDirtyRect);
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}
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mDirtyRect.setEmpty();
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}
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private void uploadFullTexture() {
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IntSize bufferSize = mImage.getSize();
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uploadDirtyRect(new Rect(0, 0, bufferSize.width, bufferSize.height));
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}
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private void uploadDirtyRect(Rect dirtyRect) {
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// If we have nothing to upload, just return for now
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if (dirtyRect.isEmpty())
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return;
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// It's possible that the buffer will be null, check for that and return
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ByteBuffer imageBuffer = mImage.getBuffer();
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if (imageBuffer == null)
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return;
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if (mTextureIDs == null) {
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mTextureIDs = new int[1];
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GLES20.glGenTextures(mTextureIDs.length, mTextureIDs, 0);
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}
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int cairoFormat = mImage.getFormat();
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CairoGLInfo glInfo = new CairoGLInfo(cairoFormat);
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bindAndSetGLParameters();
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// XXX TexSubImage2D is too broken to rely on on Adreno, and very slow
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// on other chipsets, so we always upload the entire buffer.
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IntSize bufferSize = mImage.getSize();
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if (mSize.equals(bufferSize)) {
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GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, glInfo.internalFormat, mSize.width,
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mSize.height, 0, glInfo.format, glInfo.type, imageBuffer);
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} else {
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// Our texture has been expanded to the next power of two.
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// XXX We probably never want to take this path, so throw an exception.
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throw new RuntimeException("Buffer/image size mismatch in TileLayer!");
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/*
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int bpp = CairoUtils.bitsPerPixelForCairoFormat(cairoFormat)/8;
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ByteBuffer tempBuffer =
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GeckoAppShell.allocateDirectBuffer(mSize.width * mSize.height * bpp);
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for (int y = 0; y < bufferSize.height; y++) {
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tempBuffer.position(y * mSize.width * bpp);
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imageBuffer.limit((y + 1) * bufferSize.width * bpp);
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imageBuffer.position(y * bufferSize.width * bpp);
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tempBuffer.put(imageBuffer);
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}
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imageBuffer.position(0);
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tempBuffer.position(0);
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GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, glInfo.internalFormat, mSize.width,
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mSize.height, 0, glInfo.format, glInfo.type, tempBuffer);
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GeckoAppShell.freeDirectBuffer(tempBuffer);
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*/
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}
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}
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private void bindAndSetGLParameters() {
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GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureIDs[0]);
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GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER,
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GLES20.GL_NEAREST);
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GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER,
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GLES20.GL_LINEAR);
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int repeatMode = repeats() ? GLES20.GL_REPEAT : GLES20.GL_CLAMP_TO_EDGE;
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GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, repeatMode);
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GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, repeatMode);
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}
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}
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