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      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 #include "renderthread/EglManager.h"
     22 #include "renderthread/RenderTask.h"
     23 
     24 namespace android {
     25 namespace uirenderer {
     26 
     27 class DeleteLayerTask : public renderthread::RenderTask {
     28 public:
     29     DeleteLayerTask(renderthread::EglManager& eglManager, Layer* layer)
     30         : mEglManager(eglManager)
     31         , mLayer(layer)
     32     {}
     33 
     34     virtual void run() {
     35         mEglManager.requireGlContext();
     36         LayerRenderer::destroyLayer(mLayer);
     37         mLayer = 0;
     38         delete this;
     39     }
     40 
     41 private:
     42     renderthread::EglManager& mEglManager;
     43     Layer* mLayer;
     44 };
     45 
     46 DeferredLayerUpdater::DeferredLayerUpdater(renderthread::RenderThread& thread, Layer* layer)
     47         : mSurfaceTexture(0)
     48         , mTransform(0)
     49         , mNeedsGLContextAttach(false)
     50         , mUpdateTexImage(false)
     51         , mLayer(layer)
     52         , mCaches(Caches::getInstance())
     53         , mRenderThread(thread) {
     54     mWidth = mLayer->layer.getWidth();
     55     mHeight = mLayer->layer.getHeight();
     56     mBlend = mLayer->isBlend();
     57     mColorFilter = SkSafeRef(mLayer->getColorFilter());
     58     mAlpha = mLayer->getAlpha();
     59     mMode = mLayer->getMode();
     60 }
     61 
     62 DeferredLayerUpdater::~DeferredLayerUpdater() {
     63     SkSafeUnref(mColorFilter);
     64     setTransform(0);
     65     mRenderThread.queue(new DeleteLayerTask(mRenderThread.eglManager(), mLayer));
     66     mLayer = 0;
     67 }
     68 
     69 void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
     70     OpenGLRenderer::getAlphaAndModeDirect(paint, &mAlpha, &mMode);
     71     SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : NULL;
     72     SkRefCnt_SafeAssign(mColorFilter, colorFilter);
     73 }
     74 
     75 bool DeferredLayerUpdater::apply() {
     76     bool success = true;
     77     // These properties are applied the same to both layer types
     78     mLayer->setColorFilter(mColorFilter);
     79     mLayer->setAlpha(mAlpha, mMode);
     80 
     81     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 
     98 void 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 void DeferredLayerUpdater::detachSurfaceTexture() {
    137     if (mSurfaceTexture.get()) {
    138         mRenderThread.eglManager().requireGlContext();
    139         status_t err = mSurfaceTexture->detachFromContext();
    140         if (err != 0) {
    141             // TODO: Elevate to fatal exception
    142             ALOGE("Failed to detach SurfaceTexture from context %d", err);
    143         }
    144         mSurfaceTexture = 0;
    145         mLayer->clearTexture();
    146     }
    147 }
    148 
    149 } /* namespace uirenderer */
    150 } /* namespace android */
    151