DeferredLayerUpdater.cpp revision 087bc0c14bdccf7c258dce0cdef46a69a839b427 
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        , mCaches(Caches::getInstance()) {
33    mWidth = mLayer->layer.getWidth();
34    mHeight = mLayer->layer.getHeight();
35    mBlend = mLayer->isBlend();
36    mColorFilter = SkSafeRef(mLayer->getColorFilter());
37    mAlpha = mLayer->getAlpha();
38    mMode = mLayer->getMode();
39    mDirtyRect.setEmpty();
40}
41
42DeferredLayerUpdater::~DeferredLayerUpdater() {
43    SkSafeUnref(mColorFilter);
44    if (mLayer) {
45        mCaches.resourceCache.decrementRefcount(mLayer);
46    }
47}
48
49void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
50    OpenGLRenderer::getAlphaAndModeDirect(paint, &mAlpha, &mMode);
51    SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : NULL;
52    SkRefCnt_SafeAssign(mColorFilter, colorFilter);
53}
54
55void DeferredLayerUpdater::setDisplayList(RenderNode* displayList,
56        int left, int top, int right, int bottom) {
57    mDisplayList = displayList;
58    if (mDirtyRect.isEmpty()) {
59        mDirtyRect.set(left, top, right, bottom);
60    } else {
61        mDirtyRect.unionWith(Rect(left, top, right, bottom));
62    }
63}
64
65bool DeferredLayerUpdater::apply() {
66    bool success = true;
67    // These properties are applied the same to both layer types
68    mLayer->setColorFilter(mColorFilter);
69    mLayer->setAlpha(mAlpha, mMode);
70
71    if (mDisplayList.get()) {
72        if (mWidth != mLayer->layer.getWidth() || mHeight != mLayer->layer.getHeight()) {
73            success = LayerRenderer::resizeLayer(mLayer, mWidth, mHeight);
74        }
75        mLayer->setBlend(mBlend);
76        mDisplayList->updateProperties();
77        mLayer->updateDeferred(mDisplayList.get(),
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
115        bool forceFilter = false;
116        sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
117        if (buffer != NULL) {
118            // force filtration if buffer size != layer size
119            forceFilter = mWidth != buffer->getWidth()
120                    || mHeight != buffer->getHeight();
121        }
122
123        #if DEBUG_RENDERER
124        if (dropCounter > 0) {
125            RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
126        }
127        #endif
128        mSurfaceTexture->getTransformMatrix(transform);
129        GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
130
131        LayerRenderer::updateTextureLayer(mLayer, mWidth, mHeight,
132                !mBlend, forceFilter, renderTarget, transform);
133    }
134}
135
136} /* namespace uirenderer */
137} /* namespace android */
138