void CanvasContext::invokeFunctor(RenderThread& thread, Functor* functor) {
    ATRACE_CALL();
    DrawGlInfo::Mode mode = DrawGlInfo::kModeProcessNoContext;
    if (thread.eglManager().hasEglContext()) {
        thread.eglManager().requireGlContext();
        mode = DrawGlInfo::kModeProcess;
    }

    thread.renderState().invokeFunctor(functor, mode, NULL);
}
void CanvasContext::trimMemory(RenderThread& thread, int level) {
    // No context means nothing to free
    if (!thread.eglManager().hasEglContext()) return;

    thread.eglManager().requireGlContext();
    if (level >= TRIM_MEMORY_COMPLETE) {
        Caches::getInstance().flush(Caches::kFlushMode_Full);
        thread.eglManager().destroy();
    } else if (level >= TRIM_MEMORY_UI_HIDDEN) {
        Caches::getInstance().flush(Caches::kFlushMode_Moderate);
    }
}
CanvasContext::CanvasContext(RenderThread& thread, bool translucent,
        RenderNode* rootRenderNode, IContextFactory* contextFactory)
        : mRenderThread(thread)
        , mEglManager(thread.eglManager())
        , mOpaque(!translucent)
        , mAnimationContext(contextFactory->createAnimationContext(mRenderThread.timeLord()))
        , mRootRenderNode(rootRenderNode)
        , mJankTracker(thread.timeLord().frameIntervalNanos())
        , mProfiler(mFrames) {
    mRenderThread.renderState().registerCanvasContext(this);
    mProfiler.setDensity(mRenderThread.mainDisplayInfo().density);
}
CanvasContext::CanvasContext(RenderThread& thread, bool translucent,
        RenderNode* rootRenderNode, IContextFactory* contextFactory)
        : mRenderThread(thread)
        , mEglManager(thread.eglManager())
        , mEglSurface(EGL_NO_SURFACE)
        , mDirtyRegionsEnabled(false)
        , mOpaque(!translucent)
        , mCanvas(NULL)
        , mHaveNewSurface(false)
        , mRootRenderNode(rootRenderNode) {
    mAnimationContext = contextFactory->createAnimationContext(mRenderThread.timeLord());
    mRenderThread.renderState().registerCanvasContext(this);
}
void CanvasContext::setTextureAtlas(RenderThread& thread,
        const sp<GraphicBuffer>& buffer, int64_t* map, size_t mapSize) {
    thread.eglManager().setTextureAtlas(buffer, map, mapSize);
}