diff options
Diffstat (limited to 'src/com/android/gallery3d/glrenderer/TextureUploader.java')
-rw-r--r-- | src/com/android/gallery3d/glrenderer/TextureUploader.java | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/glrenderer/TextureUploader.java b/src/com/android/gallery3d/glrenderer/TextureUploader.java new file mode 100644 index 000000000..f17ab845c --- /dev/null +++ b/src/com/android/gallery3d/glrenderer/TextureUploader.java @@ -0,0 +1,105 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.gallery3d.glrenderer; + +import com.android.gallery3d.ui.GLRoot; +import com.android.gallery3d.ui.GLRoot.OnGLIdleListener; + +import java.util.ArrayDeque; + +public class TextureUploader implements OnGLIdleListener { + private static final int INIT_CAPACITY = 64; + private static final int QUOTA_PER_FRAME = 1; + + private final ArrayDeque<UploadedTexture> mFgTextures = + new ArrayDeque<UploadedTexture>(INIT_CAPACITY); + private final ArrayDeque<UploadedTexture> mBgTextures = + new ArrayDeque<UploadedTexture>(INIT_CAPACITY); + private final GLRoot mGLRoot; + private volatile boolean mIsQueued = false; + + public TextureUploader(GLRoot root) { + mGLRoot = root; + } + + public synchronized void clear() { + while (!mFgTextures.isEmpty()) { + mFgTextures.pop().setIsUploading(false); + } + while (!mBgTextures.isEmpty()) { + mBgTextures.pop().setIsUploading(false); + } + } + + // caller should hold synchronized on "this" + private void queueSelfIfNeed() { + if (mIsQueued) return; + mIsQueued = true; + mGLRoot.addOnGLIdleListener(this); + } + + public synchronized void addBgTexture(UploadedTexture t) { + if (t.isContentValid()) return; + mBgTextures.addLast(t); + t.setIsUploading(true); + queueSelfIfNeed(); + } + + public synchronized void addFgTexture(UploadedTexture t) { + if (t.isContentValid()) return; + mFgTextures.addLast(t); + t.setIsUploading(true); + queueSelfIfNeed(); + } + + private int upload(GLCanvas canvas, ArrayDeque<UploadedTexture> deque, + int uploadQuota, boolean isBackground) { + while (uploadQuota > 0) { + UploadedTexture t; + synchronized (this) { + if (deque.isEmpty()) break; + t = deque.removeFirst(); + t.setIsUploading(false); + if (t.isContentValid()) continue; + + // this has to be protected by the synchronized block + // to prevent the inner bitmap get recycled + t.updateContent(canvas); + } + + // It will took some more time for a texture to be drawn for + // the first time. + // Thus, when scrolling, if a new column appears on screen, + // it may cause a UI jank even these textures are uploaded. + if (isBackground) t.draw(canvas, 0, 0); + --uploadQuota; + } + return uploadQuota; + } + + @Override + public boolean onGLIdle(GLCanvas canvas, boolean renderRequested) { + int uploadQuota = QUOTA_PER_FRAME; + uploadQuota = upload(canvas, mFgTextures, uploadQuota, false); + if (uploadQuota < QUOTA_PER_FRAME) mGLRoot.requestRender(); + upload(canvas, mBgTextures, uploadQuota, true); + synchronized (this) { + mIsQueued = !mFgTextures.isEmpty() || !mBgTextures.isEmpty(); + return mIsQueued; + } + } +} |