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