Home | History | Annotate | Download | only in hwui 
      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 "RenderState.h"
     17 
     18 #include "renderthread/CanvasContext.h"
     19 #include "renderthread/EglManager.h"
     20 
     21 namespace android {
     22 namespace uirenderer {
     23 
     24 RenderState::RenderState(renderthread::RenderThread& thread)
     25         : mRenderThread(thread)
     26         , mCaches(NULL)
     27         , mViewportWidth(0)
     28         , mViewportHeight(0)
     29         , mFramebuffer(0) {
     30     mThreadId = pthread_self();
     31 }
     32 
     33 RenderState::~RenderState() {
     34 }
     35 
     36 void RenderState::onGLContextCreated() {
     37     // This is delayed because the first access of Caches makes GL calls
     38     mCaches = &Caches::getInstance();
     39     mCaches->init();
     40     mCaches->setRenderState(this);
     41     mCaches->textureCache.setAssetAtlas(&mAssetAtlas);
     42 }
     43 
     44 static void layerLostGlContext(Layer* layer) {
     45     layer->onGlContextLost();
     46 }
     47 
     48 void RenderState::onGLContextDestroyed() {
     49 /*
     50     size_t size = mActiveLayers.size();
     51     if (CC_UNLIKELY(size != 0)) {
     52         ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
     53                 mRegisteredContexts.size(), size, mActiveLayers.empty());
     54         mCaches->dumpMemoryUsage();
     55         for (std::set<renderthread::CanvasContext*>::iterator cit = mRegisteredContexts.begin();
     56                 cit != mRegisteredContexts.end(); cit++) {
     57             renderthread::CanvasContext* context = *cit;
     58             ALOGE("Context: %p (root = %p)", context, context->mRootRenderNode.get());
     59             ALOGE("  Prefeteched layers: %zu", context->mPrefetechedLayers.size());
     60             for (std::set<RenderNode*>::iterator pit = context->mPrefetechedLayers.begin();
     61                     pit != context->mPrefetechedLayers.end(); pit++) {
     62                 (*pit)->debugDumpLayers("    ");
     63             }
     64             context->mRootRenderNode->debugDumpLayers("  ");
     65         }
     66 
     67 
     68         if (mActiveLayers.begin() == mActiveLayers.end()) {
     69             ALOGE("set has become empty. wat.");
     70         }
     71         for (std::set<const Layer*>::iterator lit = mActiveLayers.begin();
     72              lit != mActiveLayers.end(); lit++) {
     73             const Layer* layer = *(lit);
     74             ALOGE("Layer %p, state %d, texlayer %d, fbo %d, buildlayered %d",
     75                     layer, layer->state, layer->isTextureLayer(), layer->getFbo(), layer->wasBuildLayered);
     76         }
     77         LOG_ALWAYS_FATAL("%d layers have survived gl context destruction", size);
     78     }
     79 */
     80     std::for_each(mActiveLayers.begin(), mActiveLayers.end(), layerLostGlContext);
     81     mAssetAtlas.terminate();
     82 }
     83 
     84 void RenderState::setViewport(GLsizei width, GLsizei height) {
     85     mViewportWidth = width;
     86     mViewportHeight = height;
     87     glViewport(0, 0, mViewportWidth, mViewportHeight);
     88 }
     89 
     90 
     91 void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
     92     *outWidth = mViewportWidth;
     93     *outHeight = mViewportHeight;
     94 }
     95 
     96 void RenderState::bindFramebuffer(GLuint fbo) {
     97     if (mFramebuffer != fbo) {
     98         mFramebuffer = fbo;
     99         glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
    100     }
    101 }
    102 
    103 void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
    104     interruptForFunctorInvoke();
    105     (*functor)(mode, info);
    106     resumeFromFunctorInvoke();
    107 }
    108 
    109 void RenderState::interruptForFunctorInvoke() {
    110     if (mCaches->currentProgram) {
    111         if (mCaches->currentProgram->isInUse()) {
    112             mCaches->currentProgram->remove();
    113             mCaches->currentProgram = NULL;
    114         }
    115     }
    116     mCaches->resetActiveTexture();
    117     mCaches->unbindMeshBuffer();
    118     mCaches->unbindIndicesBuffer();
    119     mCaches->resetVertexPointers();
    120     mCaches->disableTexCoordsVertexArray();
    121     debugOverdraw(false, false);
    122 }
    123 
    124 void RenderState::resumeFromFunctorInvoke() {
    125     glViewport(0, 0, mViewportWidth, mViewportHeight);
    126     glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
    127     debugOverdraw(false, false);
    128 
    129     glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    130 
    131     mCaches->scissorEnabled = glIsEnabled(GL_SCISSOR_TEST);
    132     mCaches->enableScissor();
    133     mCaches->resetScissor();
    134 
    135     mCaches->activeTexture(0);
    136     mCaches->resetBoundTextures();
    137 
    138     mCaches->blend = true;
    139     glEnable(GL_BLEND);
    140     glBlendFunc(mCaches->lastSrcMode, mCaches->lastDstMode);
    141     glBlendEquation(GL_FUNC_ADD);
    142 }
    143 
    144 void RenderState::debugOverdraw(bool enable, bool clear) {
    145     if (mCaches->debugOverdraw && mFramebuffer == 0) {
    146         if (clear) {
    147             mCaches->disableScissor();
    148             mCaches->stencil.clear();
    149         }
    150         if (enable) {
    151             mCaches->stencil.enableDebugWrite();
    152         } else {
    153             mCaches->stencil.disable();
    154         }
    155     }
    156 }
    157 
    158 void RenderState::requireGLContext() {
    159     assertOnGLThread();
    160     mRenderThread.eglManager().requireGlContext();
    161 }
    162 
    163 void RenderState::assertOnGLThread() {
    164     pthread_t curr = pthread_self();
    165     LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
    166 }
    167 
    168 
    169 class DecStrongTask : public renderthread::RenderTask {
    170 public:
    171     DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}
    172 
    173     virtual void run() {
    174         mObject->decStrong(0);
    175         mObject = 0;
    176         delete this;
    177     }
    178 
    179 private:
    180     VirtualLightRefBase* mObject;
    181 };
    182 
    183 void RenderState::postDecStrong(VirtualLightRefBase* object) {
    184     mRenderThread.queue(new DecStrongTask(object));
    185 }
    186 
    187 } /* namespace uirenderer */
    188 } /* namespace android */
    189