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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 DeferredLayerUpdater::DeferredLayerUpdater(Layer* layer)
     28         : mSurfaceTexture(nullptr)
     29         , mTransform(nullptr)
     30         , mNeedsGLContextAttach(false)
     31         , mUpdateTexImage(false)
     32         , mLayer(layer)
     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 }
     41 
     42 DeferredLayerUpdater::~DeferredLayerUpdater() {
     43     SkSafeUnref(mColorFilter);
     44     setTransform(nullptr);
     45     mLayer->postDecStrong();
     46     mLayer = nullptr;
     47 }
     48 
     49 void DeferredLayerUpdater::setPaint(const SkPaint* paint) {
     50     mAlpha = PaintUtils::getAlphaDirect(paint);
     51     mMode = PaintUtils::getXfermodeDirect(paint);
     52     SkColorFilter* colorFilter = (paint) ? paint->getColorFilter() : nullptr;
     53     SkRefCnt_SafeAssign(mColorFilter, colorFilter);
     54 }
     55 
     56 void DeferredLayerUpdater::apply() {
     57     // These properties are applied the same to both layer types
     58     mLayer->setColorFilter(mColorFilter);
     59     mLayer->setAlpha(mAlpha, mMode);
     60 
     61     if (mSurfaceTexture.get()) {
     62         if (mNeedsGLContextAttach) {
     63             mNeedsGLContextAttach = false;
     64             mSurfaceTexture->attachToContext(mLayer->getTextureId());
     65         }
     66         if (mUpdateTexImage) {
     67             mUpdateTexImage = false;
     68             doUpdateTexImage();
     69         }
     70         if (mTransform) {
     71             mLayer->getTransform().load(*mTransform);
     72             setTransform(nullptr);
     73         }
     74     }
     75 }
     76 
     77 void DeferredLayerUpdater::doUpdateTexImage() {
     78     if (mSurfaceTexture->updateTexImage() == NO_ERROR) {
     79         float transform[16];
     80 
     81         int64_t frameNumber = mSurfaceTexture->getFrameNumber();
     82         // If the GLConsumer queue is in synchronous mode, need to discard all
     83         // but latest frame, using the frame number to tell when we no longer
     84         // have newer frames to target. Since we can't tell which mode it is in,
     85         // do this unconditionally.
     86         int dropCounter = 0;
     87         while (mSurfaceTexture->updateTexImage() == NO_ERROR) {
     88             int64_t newFrameNumber = mSurfaceTexture->getFrameNumber();
     89             if (newFrameNumber == frameNumber) break;
     90             frameNumber = newFrameNumber;
     91             dropCounter++;
     92         }
     93 
     94         bool forceFilter = false;
     95         sp<GraphicBuffer> buffer = mSurfaceTexture->getCurrentBuffer();
     96         if (buffer != nullptr) {
     97             // force filtration if buffer size != layer size
     98             forceFilter = mWidth != static_cast<int>(buffer->getWidth())
     99                     || mHeight != static_cast<int>(buffer->getHeight());
    100         }
    101 
    102         #if DEBUG_RENDERER
    103         if (dropCounter > 0) {
    104             RENDERER_LOGD("Dropped %d frames on texture layer update", dropCounter);
    105         }
    106         #endif
    107         mSurfaceTexture->getTransformMatrix(transform);
    108         GLenum renderTarget = mSurfaceTexture->getCurrentTextureTarget();
    109 
    110         LOG_ALWAYS_FATAL_IF(renderTarget != GL_TEXTURE_2D && renderTarget != GL_TEXTURE_EXTERNAL_OES,
    111                 "doUpdateTexImage target %x, 2d %x, EXT %x",
    112                 renderTarget, GL_TEXTURE_2D, GL_TEXTURE_EXTERNAL_OES);
    113         LayerRenderer::updateTextureLayer(mLayer, mWidth, mHeight,
    114                 !mBlend, forceFilter, renderTarget, transform);
    115     }
    116 }
    117 
    118 void DeferredLayerUpdater::detachSurfaceTexture() {
    119     if (mSurfaceTexture.get()) {
    120         status_t err = mSurfaceTexture->detachFromContext();
    121         if (err != 0) {
    122             // TODO: Elevate to fatal exception
    123             ALOGE("Failed to detach SurfaceTexture from context %d", err);
    124         }
    125         mSurfaceTexture = nullptr;
    126         mLayer->clearTexture();
    127     }
    128 }
    129 
    130 } /* namespace uirenderer */
    131 } /* namespace android */
    132