1 files changed, 362 insertions, 0 deletions
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
new file mode 100644
index 0000000..967cb6f
--- /dev/null
+++ b/libs/hwui/renderthread/CanvasContext.cpp
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+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "CanvasContext.h"
+
+#include <algorithm>
+#include <private/hwui/DrawGlInfo.h>
+#include <strings.h>
+
+#include "EglManager.h"
+#include "RenderThread.h"
+#include "../AnimationContext.h"
+#include "../Caches.h"
+#include "../DeferredLayerUpdater.h"
+#include "../RenderState.h"
+#include "../LayerRenderer.h"
+#include "../OpenGLRenderer.h"
+#include "../Stencil.h"
+
+#define TRIM_MEMORY_COMPLETE 80
+#define TRIM_MEMORY_UI_HIDDEN 20
+
+namespace android {
+namespace uirenderer {
+namespace renderthread {
+
+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());
+}
+
+CanvasContext::~CanvasContext() {
+    destroy();
+    delete mAnimationContext;
+}
+
+void CanvasContext::destroy() {
+    stopDrawing();
+    freePrefetechedLayers();
+    destroyHardwareResources();
+    if (mCanvas) {
+        delete mCanvas;
+        mCanvas = 0;
+    }
+    setSurface(NULL);
+}
+
+void CanvasContext::setSurface(ANativeWindow* window) {
+    mNativeWindow = window;
+
+    if (mEglSurface != EGL_NO_SURFACE) {
+        mEglManager.destroySurface(mEglSurface);
+        mEglSurface = EGL_NO_SURFACE;
+    }
+
+    if (window) {
+        mEglSurface = mEglManager.createSurface(window);
+    }
+
+    if (mEglSurface != EGL_NO_SURFACE) {
+        mDirtyRegionsEnabled = mEglManager.enableDirtyRegions(mEglSurface);
+        mHaveNewSurface = true;
+        makeCurrent();
+    } else {
+        mRenderThread.removeFrameCallback(this);
+    }
+}
+
+void CanvasContext::swapBuffers() {
+    mEglManager.swapBuffers(mEglSurface);
+    mHaveNewSurface = false;
+}
+
+void CanvasContext::requireSurface() {
+    LOG_ALWAYS_FATAL_IF(mEglSurface == EGL_NO_SURFACE,
+            "requireSurface() called but no surface set!");
+    makeCurrent();
+}
+
+bool CanvasContext::initialize(ANativeWindow* window) {
+    if (mCanvas) return false;
+    setSurface(window);
+    mCanvas = new OpenGLRenderer(mRenderThread.renderState());
+    mCanvas->initProperties();
+    return true;
+}
+
+void CanvasContext::updateSurface(ANativeWindow* window) {
+    setSurface(window);
+}
+
+void CanvasContext::pauseSurface(ANativeWindow* window) {
+    stopDrawing();
+}
+
+void CanvasContext::setup(int width, int height, const Vector3& lightCenter, float lightRadius,
+        uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha) {
+    if (!mCanvas) return;
+    mCanvas->setViewport(width, height);
+    mCanvas->initLight(lightCenter, lightRadius, ambientShadowAlpha, spotShadowAlpha);
+}
+
+void CanvasContext::setOpaque(bool opaque) {
+    mOpaque = opaque;
+}
+
+void CanvasContext::makeCurrent() {
+    // TODO: Figure out why this workaround is needed, see b/13913604
+    // In the meantime this matches the behavior of GLRenderer, so it is not a regression
+    mHaveNewSurface |= mEglManager.makeCurrent(mEglSurface);
+}
+
+void CanvasContext::processLayerUpdate(DeferredLayerUpdater* layerUpdater) {
+    bool success = layerUpdater->apply();
+    LOG_ALWAYS_FATAL_IF(!success, "Failed to update layer!");
+    if (layerUpdater->backingLayer()->deferredUpdateScheduled) {
+        mCanvas->pushLayerUpdate(layerUpdater->backingLayer());
+    }
+}
+
+void CanvasContext::prepareTree(TreeInfo& info) {
+    mRenderThread.removeFrameCallback(this);
+
+    info.damageAccumulator = &mDamageAccumulator;
+    info.renderer = mCanvas;
+    if (mPrefetechedLayers.size() && info.mode == TreeInfo::MODE_FULL) {
+        info.canvasContext = this;
+    }
+    mAnimationContext->startFrame();
+    mRootRenderNode->prepareTree(info);
+    mAnimationContext->runRemainingAnimations(info);
+
+    if (info.canvasContext) {
+        freePrefetechedLayers();
+    }
+
+    int runningBehind = 0;
+    // TODO: This query is moderately expensive, investigate adding some sort
+    // of fast-path based off when we last called eglSwapBuffers() as well as
+    // last vsync time. Or something.
+    mNativeWindow->query(mNativeWindow.get(),
+            NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND, &runningBehind);
+    info.out.canDrawThisFrame = !runningBehind;
+
+    if (info.out.hasAnimations || !info.out.canDrawThisFrame) {
+        if (!info.out.requiresUiRedraw) {
+            // If animationsNeedsRedraw is set don't bother posting for an RT anim
+            // as we will just end up fighting the UI thread.
+            mRenderThread.postFrameCallback(this);
+        }
+    }
+}
+
+void CanvasContext::stopDrawing() {
+    mRenderThread.removeFrameCallback(this);
+}
+
+void CanvasContext::notifyFramePending() {
+    ATRACE_CALL();
+    mRenderThread.pushBackFrameCallback(this);
+}
+
+void CanvasContext::draw() {
+    LOG_ALWAYS_FATAL_IF(!mCanvas || mEglSurface == EGL_NO_SURFACE,
+            "drawRenderNode called on a context with no canvas or surface!");
+
+    profiler().markPlaybackStart();
+
+    SkRect dirty;
+    mDamageAccumulator.finish(&dirty);
+
+    EGLint width, height;
+    mEglManager.beginFrame(mEglSurface, &width, &height);
+    if (width != mCanvas->getViewportWidth() || height != mCanvas->getViewportHeight()) {
+        mCanvas->setViewport(width, height);
+        dirty.setEmpty();
+    } else if (!mDirtyRegionsEnabled || mHaveNewSurface) {
+        dirty.setEmpty();
+    } else {
+        if (!dirty.isEmpty() && !dirty.intersect(0, 0, width, height)) {
+            ALOGW("Dirty " RECT_STRING " doesn't intersect with 0 0 %d %d ?",
+                    SK_RECT_ARGS(dirty), width, height);
+            dirty.setEmpty();
+        }
+        profiler().unionDirty(&dirty);
+    }
+
+    status_t status;
+    if (!dirty.isEmpty()) {
+        status = mCanvas->prepareDirty(dirty.fLeft, dirty.fTop,
+                dirty.fRight, dirty.fBottom, mOpaque);
+    } else {
+        status = mCanvas->prepare(mOpaque);
+    }
+
+    Rect outBounds;
+    status |= mCanvas->drawRenderNode(mRootRenderNode.get(), outBounds);
+
+    profiler().draw(mCanvas);
+
+    mCanvas->finish();
+
+    profiler().markPlaybackEnd();
+
+    if (status & DrawGlInfo::kStatusDrew) {
+        swapBuffers();
+    }
+
+    profiler().finishFrame();
+}
+
+// Called by choreographer to do an RT-driven animation
+void CanvasContext::doFrame() {
+    if (CC_UNLIKELY(!mCanvas || mEglSurface == EGL_NO_SURFACE)) {
+        return;
+    }
+
+    ATRACE_CALL();
+
+    profiler().startFrame();
+
+    TreeInfo info(TreeInfo::MODE_RT_ONLY, mRenderThread.renderState());
+    prepareTree(info);
+    if (info.out.canDrawThisFrame) {
+        draw();
+    }
+}
+
+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::markLayerInUse(RenderNode* node) {
+    if (mPrefetechedLayers.erase(node)) {
+        node->decStrong(0);
+    }
+}
+
+static void destroyPrefetechedNode(RenderNode* node) {
+    ALOGW("Incorrectly called buildLayer on View: %s, destroying layer...", node->getName());
+    node->destroyHardwareResources();
+    node->decStrong(0);
+}
+
+void CanvasContext::freePrefetechedLayers() {
+    if (mPrefetechedLayers.size()) {
+        requireGlContext();
+        std::for_each(mPrefetechedLayers.begin(), mPrefetechedLayers.end(), destroyPrefetechedNode);
+        mPrefetechedLayers.clear();
+    }
+}
+
+void CanvasContext::buildLayer(RenderNode* node) {
+    ATRACE_CALL();
+    if (!mEglManager.hasEglContext() || !mCanvas) {
+        return;
+    }
+    requireGlContext();
+    // buildLayer() will leave the tree in an unknown state, so we must stop drawing
+    stopDrawing();
+
+    TreeInfo info(TreeInfo::MODE_FULL, mRenderThread.renderState());
+    info.damageAccumulator = &mDamageAccumulator;
+    info.renderer = mCanvas;
+    info.runAnimations = false;
+    node->prepareTree(info);
+    SkRect ignore;
+    mDamageAccumulator.finish(&ignore);
+    // Tickle the GENERIC property on node to mark it as dirty for damaging
+    // purposes when the frame is actually drawn
+    node->setPropertyFieldsDirty(RenderNode::GENERIC);
+
+    mCanvas->flushLayerUpdates();
+
+    node->incStrong(0);
+    mPrefetechedLayers.insert(node);
+}
+
+bool CanvasContext::copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap) {
+    requireGlContext();
+    layer->apply();
+    return LayerRenderer::copyLayer(mRenderThread.renderState(), layer->backingLayer(), bitmap);
+}
+
+void CanvasContext::destroyHardwareResources() {
+    stopDrawing();
+    if (mEglManager.hasEglContext()) {
+        requireGlContext();
+        freePrefetechedLayers();
+        mRootRenderNode->destroyHardwareResources();
+        Caches::getInstance().flush(Caches::kFlushMode_Layers);
+    }
+}
+
+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);
+    }
+}
+
+void CanvasContext::runWithGlContext(RenderTask* task) {
+    requireGlContext();
+    task->run();
+}
+
+Layer* CanvasContext::createRenderLayer(int width, int height) {
+    requireSurface();
+    return LayerRenderer::createRenderLayer(mRenderThread.renderState(), width, height);
+}
+
+Layer* CanvasContext::createTextureLayer() {
+    requireSurface();
+    return LayerRenderer::createTextureLayer(mRenderThread.renderState());
+}
+
+void CanvasContext::requireGlContext() {
+    mEglManager.requireGlContext();
+}
+
+void CanvasContext::setTextureAtlas(RenderThread& thread,
+        const sp<GraphicBuffer>& buffer, int64_t* map, size_t mapSize) {
+    thread.eglManager().setTextureAtlas(buffer, map, mapSize);
+}
+
+} /* namespace renderthread */
+} /* namespace uirenderer */
+} /* namespace android */