DeferredLayerUpdater.cpp revision 90d0c75e94a32fb7d993fae69762820aabc2fcbb 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include "DeferredLayerUpdater.h"
17
18#include "OpenGLRenderer.h"
19
20#include "LayerRenderer.h"
21
22namespace android {
23namespace uirenderer {
24
25DeferredLayerUpdater::DeferredLayerUpdater(Layer* layer, OpenGLRenderer* renderer)
26        : mDisplayList(0)
27        , mSurfaceTexture(0)
28        , mTransform(0)
29        , mNeedsGLContextAttach(false)
30        , mUpdateTexImage(false)
31        , mLayer(layer)
32        , mRenderer(renderer)
33        , mCaches(Caches::getInstance()) {
34    mCaches.resourceCache.incrementRefcount(mLayer);
35    mWidth = mLayer->layer.getWidth();
36    mHeight = mLayer->layer.getHeight();
37    mBlend = mLayer->isBlend();
38    mColorFilter = mLayer->getColorFilter();
39    mAlpha = mLayer->getAlpha();
40    mMode = mLayer->getMode();
41    mDirtyRect.setEmpty();
42}
43
44DeferredLayerUpdater::~DeferredLayerUpdater() {
45    setColorFilter(NULL);
46    if (mLayer) {
47        mCaches.resourceCache.decrementRefcount(mLayer);
48    }
49    delete mRenderer;
50}
51
52void DeferredLayerUpdater::setColorFilter(SkColorFilter* colorFilter) {
53    SkRefCnt_SafeAssign(mColorFilter, colorFilter);
54}
55
56void DeferredLayerUpdater::setDisplayList(DisplayList* displayList,
57        int left, int top, int right, int bottom) {
58    mDisplayList = displayList;
59    if (mDirtyRect.isEmpty()) {
60        mDirtyRect.set(left, top, right, bottom);
61    } else {
62        mDirtyRect.unionWith(Rect(left, top, right, bottom));
63    }
64}
65
66bool DeferredLayerUpdater::apply() {
67    bool success = true;
68    // These properties are applied the same to both layer types
69    mLayer->setColorFilter(mColorFilter);
70    mLayer->setAlpha(mAlpha, mMode);
71
72    if (mDisplayList) {
73        if (mWidth != mLayer->layer.getWidth() || mHeight != mLayer->layer.getHeight()) {
74            success = LayerRenderer::resizeLayer(mLayer, mWidth, mHeight);
75        }
76        mLayer->setBlend(mBlend);
77        mLayer->updateDeferred(mRenderer, mDisplayList,
78                mDirtyRect.left, mDirtyRect.top, mDirtyRect.right, mDirtyRect.bottom);
79        mDirtyRect.setEmpty();
80        mDisplayList = 0;
81    } else if (mSurfaceTexture.get()) {
82        if (mNeedsGLContextAttach) {
83            mNeedsGLContextAttach = false;
84            mSurfaceTexture->attachToContext(mLayer->getTexture());
85        }
86        if (mUpdateTexImage) {
87            mUpdateTexImage = false;
88            doUpdateTexImage();
89        }
90        if (mTransform) {
91            mLayer->getTransform().load(*mTransform);
92            setTransform(0);
93        }
94    }
95    return success;
96}
97
98void DeferredLayerUpdater::doUpdateTexImage() {
99    if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
100        float transform[16];
101
102        int64_t frameNumber = mSurfaceTexture->getFrameNumber();
103        // If the GLConsumer queue is in synchronous mode, need to discard all
104        // but latest frame, using the frame number to tell when we no longer
105        // have newer frames to target. Since we can't tell which mode it is in,
106        // do this unconditionally.
107        int dropCounter = 0;
108        while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
109            int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
110            if (newFrameNumber == frameNumber) break;
111            frameNumber = newFrameNumber;
112            dropCounter++;
113        }
114        #if DEBUG_RENDERER
115        if (dropCounter > 0) {
116            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
117        }
118        #endif
119        mSurfaceTexture->getTransformMatrix(transform);
120        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
121
122        LayerRenderer::updateTextureLayer(mLayer, mWidth, mHeight, !mBlend,
123                renderTarget, transform);
124    }
125}
126
127void DeferredLayerUpdater::applyDeferred(DeferredLayerUpdater* deferredApply) {
128    // Default assignment operator doesn't quite work, and fails due to mCaches anyway
129    deferredApply->mWidth = mWidth;
130    deferredApply->mHeight = mHeight;
131    deferredApply->mBlend = mBlend;
132    deferredApply->mAlpha = mAlpha;
133    deferredApply->mMode = mMode;
134    deferredApply->mDirtyRect.set(mDirtyRect);
135    deferredApply->mDisplayList = mDisplayList;
136    deferredApply->mSurfaceTexture = mSurfaceTexture;
137    deferredApply->mNeedsGLContextAttach = mNeedsGLContextAttach;
138    deferredApply->mUpdateTexImage = mUpdateTexImage;
139    deferredApply->setColorFilter(mColorFilter);
140    deferredApply->setTransform(mTransform);
141
142    mDisplayList = 0;
143    mDirtyRect.setEmpty();
144    mTransform = 0;
145    mNeedsGLContextAttach = false;
146    mUpdateTexImage = false;
147}
148
149} /* namespace uirenderer */
150} /* namespace android */
151