DeferredLayerUpdater.cpp revision 9757ac0b9d62f6aea5e47cfb375f445c78bb7897 
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    mWidth = mLayer->layer.getWidth();
35    mHeight = mLayer->layer.getHeight();
36    mBlend = mLayer->isBlend();
37    mColorFilter = SkSafeRef(mLayer->getColorFilter());
38    mAlpha = mLayer->getAlpha();
39    mMode = mLayer->getMode();
40    mDirtyRect.setEmpty();
41}
42
43DeferredLayerUpdater::~DeferredLayerUpdater() {
44    SkSafeUnref(mColorFilter);
45    if (mLayer) {
46        mCaches.resourceCache.decrementRefcount(mLayer);
47    }
48    delete mRenderer;
49}
50
51void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
52    OpenGLRenderer::getAlphaAndModeDirect(paint, &mAlpha, &mMode);
53    SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : NULL;
54    SkRefCnt_SafeAssign(mColorFilter, colorFilter);
55}
56
57void DeferredLayerUpdater::setDisplayList(DisplayList* displayList,
58        int left, int top, int right, int bottom) {
59    mDisplayList = displayList;
60    if (mDirtyRect.isEmpty()) {
61        mDirtyRect.set(left, top, right, bottom);
62    } else {
63        mDirtyRect.unionWith(Rect(left, top, right, bottom));
64    }
65}
66
67bool DeferredLayerUpdater::apply() {
68    bool success = true;
69    // These properties are applied the same to both layer types
70    mLayer->setColorFilter(mColorFilter);
71    mLayer->setAlpha(mAlpha, mMode);
72
73    if (mDisplayList) {
74        if (mWidth != mLayer->layer.getWidth() || mHeight != mLayer->layer.getHeight()) {
75            success = LayerRenderer::resizeLayer(mLayer, mWidth, mHeight);
76        }
77        mLayer->setBlend(mBlend);
78        mLayer->updateDeferred(mRenderer, mDisplayList,
79                mDirtyRect.left, mDirtyRect.top, mDirtyRect.right, mDirtyRect.bottom);
80        mDirtyRect.setEmpty();
81        mDisplayList = 0;
82    } else if (mSurfaceTexture.get()) {
83        if (mNeedsGLContextAttach) {
84            mNeedsGLContextAttach = false;
85            mSurfaceTexture->attachToContext(mLayer->getTexture());
86        }
87        if (mUpdateTexImage) {
88            mUpdateTexImage = false;
89            doUpdateTexImage();
90        }
91        if (mTransform) {
92            mLayer->getTransform().load(*mTransform);
93            setTransform(0);
94        }
95    }
96    return success;
97}
98
99void DeferredLayerUpdater::doUpdateTexImage() {
100    if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
101        float transform[16];
102
103        int64_t frameNumber = mSurfaceTexture->getFrameNumber();
104        // If the GLConsumer queue is in synchronous mode, need to discard all
105        // but latest frame, using the frame number to tell when we no longer
106        // have newer frames to target. Since we can't tell which mode it is in,
107        // do this unconditionally.
108        int dropCounter = 0;
109        while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
110            int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
111            if (newFrameNumber == frameNumber) break;
112            frameNumber = newFrameNumber;
113            dropCounter++;
114        }
115
116        bool forceFilter = false;
117        sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
118        if (buffer != NULL) {
119            // force filtration if buffer size != layer size
120            forceFilter = mWidth != buffer->getWidth()
121                    || mHeight != buffer->getHeight();
122        }
123
124        #if DEBUG_RENDERER
125        if (dropCounter > 0) {
126            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
127        }
128        #endif
129        mSurfaceTexture->getTransformMatrix(transform);
130        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
131
132        LayerRenderer::updateTextureLayer(mLayer, mWidth, mHeight,
133                !mBlend, forceFilter, renderTarget, transform);
134    }
135}
136
137} /* namespace uirenderer */
138} /* namespace android */
139