ab762153fb
This is part of API cleanup as we make DDL usage more mainstream in Skia. Since Android doesn't use DDLs, the cast from recordingContext to directContext will always succeed and there's no functional change. Change-Id: Ie585cf6c97d01fecf082f146d5692999371fd39d
662 lines
28 KiB
C++
662 lines
28 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "SkiaPipeline.h"
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#include <SkImageEncoder.h>
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#include <SkImageInfo.h>
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#include <SkImagePriv.h>
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#include <SkMultiPictureDocument.h>
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#include <SkOverdrawCanvas.h>
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#include <SkOverdrawColorFilter.h>
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#include <SkPicture.h>
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#include <SkPictureRecorder.h>
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#include <SkSerialProcs.h>
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#include <SkTypeface.h>
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#include <android-base/properties.h>
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#include <unistd.h>
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#include <sstream>
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#include "LightingInfo.h"
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#include "VectorDrawable.h"
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#include "thread/CommonPool.h"
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#include "tools/SkSharingProc.h"
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#include "utils/Color.h"
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#include "utils/String8.h"
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#include "utils/TraceUtils.h"
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using namespace android::uirenderer::renderthread;
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namespace android {
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namespace uirenderer {
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namespace skiapipeline {
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SkiaPipeline::SkiaPipeline(RenderThread& thread) : mRenderThread(thread) {
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setSurfaceColorProperties(mColorMode);
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}
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SkiaPipeline::~SkiaPipeline() {
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unpinImages();
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}
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void SkiaPipeline::onDestroyHardwareResources() {
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unpinImages();
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mRenderThread.cacheManager().trimStaleResources();
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}
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bool SkiaPipeline::pinImages(std::vector<SkImage*>& mutableImages) {
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for (SkImage* image : mutableImages) {
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if (SkImage_pinAsTexture(image, mRenderThread.getGrContext())) {
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mPinnedImages.emplace_back(sk_ref_sp(image));
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} else {
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return false;
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}
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}
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return true;
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}
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void SkiaPipeline::unpinImages() {
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for (auto& image : mPinnedImages) {
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SkImage_unpinAsTexture(image.get(), mRenderThread.getGrContext());
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}
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mPinnedImages.clear();
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}
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void SkiaPipeline::renderLayers(const LightGeometry& lightGeometry,
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LayerUpdateQueue* layerUpdateQueue, bool opaque,
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const LightInfo& lightInfo) {
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LightingInfo::updateLighting(lightGeometry, lightInfo);
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ATRACE_NAME("draw layers");
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renderLayersImpl(*layerUpdateQueue, opaque);
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layerUpdateQueue->clear();
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}
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void SkiaPipeline::renderLayersImpl(const LayerUpdateQueue& layers, bool opaque) {
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sk_sp<GrDirectContext> cachedContext;
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// Render all layers that need to be updated, in order.
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for (size_t i = 0; i < layers.entries().size(); i++) {
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RenderNode* layerNode = layers.entries()[i].renderNode.get();
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// only schedule repaint if node still on layer - possible it may have been
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// removed during a dropped frame, but layers may still remain scheduled so
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// as not to lose info on what portion is damaged
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if (CC_UNLIKELY(layerNode->getLayerSurface() == nullptr)) {
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continue;
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}
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SkASSERT(layerNode->getLayerSurface());
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SkiaDisplayList* displayList = (SkiaDisplayList*)layerNode->getDisplayList();
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if (!displayList || displayList->isEmpty()) {
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ALOGE("%p drawLayers(%s) : missing drawable", layerNode, layerNode->getName());
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return;
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}
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const Rect& layerDamage = layers.entries()[i].damage;
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SkCanvas* layerCanvas = layerNode->getLayerSurface()->getCanvas();
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int saveCount = layerCanvas->save();
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SkASSERT(saveCount == 1);
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layerCanvas->androidFramework_setDeviceClipRestriction(layerDamage.toSkIRect());
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// TODO: put localized light center calculation and storage to a drawable related code.
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// It does not seem right to store something localized in a global state
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// fix here and in recordLayers
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const Vector3 savedLightCenter(LightingInfo::getLightCenterRaw());
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Vector3 transformedLightCenter(savedLightCenter);
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// map current light center into RenderNode's coordinate space
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layerNode->getSkiaLayer()->inverseTransformInWindow.mapPoint3d(transformedLightCenter);
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LightingInfo::setLightCenterRaw(transformedLightCenter);
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const RenderProperties& properties = layerNode->properties();
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const SkRect bounds = SkRect::MakeWH(properties.getWidth(), properties.getHeight());
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if (properties.getClipToBounds() && layerCanvas->quickReject(bounds)) {
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return;
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}
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ATRACE_FORMAT("drawLayer [%s] %.1f x %.1f", layerNode->getName(), bounds.width(),
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bounds.height());
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layerNode->getSkiaLayer()->hasRenderedSinceRepaint = false;
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layerCanvas->clear(SK_ColorTRANSPARENT);
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RenderNodeDrawable root(layerNode, layerCanvas, false);
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root.forceDraw(layerCanvas);
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layerCanvas->restoreToCount(saveCount);
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LightingInfo::setLightCenterRaw(savedLightCenter);
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// cache the current context so that we can defer flushing it until
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// either all the layers have been rendered or the context changes
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GrDirectContext* currentContext =
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GrAsDirectContext(layerNode->getLayerSurface()->getCanvas()->recordingContext());
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if (cachedContext.get() != currentContext) {
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if (cachedContext.get()) {
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ATRACE_NAME("flush layers (context changed)");
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cachedContext->flushAndSubmit();
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}
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cachedContext.reset(SkSafeRef(currentContext));
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}
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}
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if (cachedContext.get()) {
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ATRACE_NAME("flush layers");
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cachedContext->flushAndSubmit();
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}
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}
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bool SkiaPipeline::createOrUpdateLayer(RenderNode* node, const DamageAccumulator& damageAccumulator,
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ErrorHandler* errorHandler) {
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// compute the size of the surface (i.e. texture) to be allocated for this layer
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const int surfaceWidth = ceilf(node->getWidth() / float(LAYER_SIZE)) * LAYER_SIZE;
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const int surfaceHeight = ceilf(node->getHeight() / float(LAYER_SIZE)) * LAYER_SIZE;
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SkSurface* layer = node->getLayerSurface();
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if (!layer || layer->width() != surfaceWidth || layer->height() != surfaceHeight) {
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SkImageInfo info;
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info = SkImageInfo::Make(surfaceWidth, surfaceHeight, getSurfaceColorType(),
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kPremul_SkAlphaType, getSurfaceColorSpace());
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SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
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SkASSERT(mRenderThread.getGrContext() != nullptr);
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node->setLayerSurface(SkSurface::MakeRenderTarget(mRenderThread.getGrContext(),
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SkBudgeted::kYes, info, 0,
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this->getSurfaceOrigin(), &props));
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if (node->getLayerSurface()) {
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// update the transform in window of the layer to reset its origin wrt light source
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// position
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Matrix4 windowTransform;
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damageAccumulator.computeCurrentTransform(&windowTransform);
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node->getSkiaLayer()->inverseTransformInWindow.loadInverse(windowTransform);
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} else {
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String8 cachesOutput;
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mRenderThread.cacheManager().dumpMemoryUsage(cachesOutput,
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&mRenderThread.renderState());
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ALOGE("%s", cachesOutput.string());
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if (errorHandler) {
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std::ostringstream err;
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err << "Unable to create layer for " << node->getName();
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const int maxTextureSize = DeviceInfo::get()->maxTextureSize();
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err << ", size " << info.width() << "x" << info.height() << " max size "
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<< maxTextureSize << " color type " << (int)info.colorType() << " has context "
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<< (int)(mRenderThread.getGrContext() != nullptr);
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errorHandler->onError(err.str());
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}
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}
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return true;
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}
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return false;
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}
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void SkiaPipeline::prepareToDraw(const RenderThread& thread, Bitmap* bitmap) {
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GrDirectContext* context = thread.getGrContext();
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if (context) {
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ATRACE_FORMAT("Bitmap#prepareToDraw %dx%d", bitmap->width(), bitmap->height());
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auto image = bitmap->makeImage();
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if (image.get() && !bitmap->isHardware()) {
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SkImage_pinAsTexture(image.get(), context);
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SkImage_unpinAsTexture(image.get(), context);
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}
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}
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}
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static void savePictureAsync(const sk_sp<SkData>& data, const std::string& filename) {
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CommonPool::post([data, filename] {
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if (0 == access(filename.c_str(), F_OK)) {
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return;
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}
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SkFILEWStream stream(filename.c_str());
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if (stream.isValid()) {
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stream.write(data->data(), data->size());
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stream.flush();
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ALOGD("SKP Captured Drawing Output (%zu bytes) for frame. %s", stream.bytesWritten(),
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filename.c_str());
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}
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});
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}
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// Note multiple SkiaPipeline instances may be loaded if more than one app is visible.
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// Each instance may observe the filename changing and try to record to a file of the same name.
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// Only the first one will succeed. There is no scope available here where we could coordinate
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// to cause this function to return true for only one of the instances.
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bool SkiaPipeline::shouldStartNewFileCapture() {
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// Don't start a new file based capture if one is currently ongoing.
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if (mCaptureMode != CaptureMode::None) { return false; }
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// A new capture is started when the filename property changes.
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// Read the filename property.
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std::string prop = base::GetProperty(PROPERTY_CAPTURE_SKP_FILENAME, "0");
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// if the filename property changed to a valid value
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if (prop[0] != '0' && mCapturedFile != prop) {
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// remember this new filename
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mCapturedFile = prop;
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// and get a property indicating how many frames to capture.
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mCaptureSequence = base::GetIntProperty(PROPERTY_CAPTURE_SKP_FRAMES, 1);
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if (mCaptureSequence <= 0) {
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return false;
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} else if (mCaptureSequence == 1) {
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mCaptureMode = CaptureMode::SingleFrameSKP;
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} else {
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mCaptureMode = CaptureMode::MultiFrameSKP;
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}
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return true;
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}
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return false;
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}
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// performs the first-frame work of a multi frame SKP capture. Returns true if successful.
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bool SkiaPipeline::setupMultiFrameCapture() {
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ALOGD("Set up multi-frame capture, frames = %d", mCaptureSequence);
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// We own this stream and need to hold it until close() finishes.
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auto stream = std::make_unique<SkFILEWStream>(mCapturedFile.c_str());
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if (stream->isValid()) {
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mOpenMultiPicStream = std::move(stream);
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mSerialContext.reset(new SkSharingSerialContext());
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SkSerialProcs procs;
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procs.fImageProc = SkSharingSerialContext::serializeImage;
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procs.fImageCtx = mSerialContext.get();
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procs.fTypefaceProc = [](SkTypeface* tf, void* ctx){
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return tf->serialize(SkTypeface::SerializeBehavior::kDoIncludeData);
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};
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// SkDocuments don't take owership of the streams they write.
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// we need to keep it until after mMultiPic.close()
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// procs is passed as a pointer, but just as a method of having an optional default.
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// procs doesn't need to outlive this Make call.
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mMultiPic = SkMakeMultiPictureDocument(mOpenMultiPicStream.get(), &procs);
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return true;
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} else {
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ALOGE("Could not open \"%s\" for writing.", mCapturedFile.c_str());
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mCaptureSequence = 0;
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mCaptureMode = CaptureMode::None;
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return false;
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}
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}
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// recurse through the rendernode's children, add any nodes which are layers to the queue.
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static void collectLayers(RenderNode* node, LayerUpdateQueue* layers) {
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SkiaDisplayList* dl = (SkiaDisplayList*)node->getDisplayList();
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if (dl) {
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const auto& prop = node->properties();
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if (node->hasLayer()) {
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layers->enqueueLayerWithDamage(node, Rect(prop.getWidth(), prop.getHeight()));
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}
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// The way to recurse through rendernodes is to call this with a lambda.
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dl->updateChildren([&](RenderNode* child) { collectLayers(child, layers); });
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}
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}
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// record the provided layers to the provided canvas as self-contained skpictures.
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static void recordLayers(const LayerUpdateQueue& layers,
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SkCanvas* mskpCanvas) {
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const Vector3 savedLightCenter(LightingInfo::getLightCenterRaw());
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// Record the commands to re-draw each dirty layer into an SkPicture
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for (size_t i = 0; i < layers.entries().size(); i++) {
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RenderNode* layerNode = layers.entries()[i].renderNode.get();
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const Rect& layerDamage = layers.entries()[i].damage;
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const RenderProperties& properties = layerNode->properties();
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// Temporarily map current light center into RenderNode's coordinate space
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Vector3 transformedLightCenter(savedLightCenter);
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layerNode->getSkiaLayer()->inverseTransformInWindow.mapPoint3d(transformedLightCenter);
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LightingInfo::setLightCenterRaw(transformedLightCenter);
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SkPictureRecorder layerRec;
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auto* recCanvas = layerRec.beginRecording(properties.getWidth(),
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properties.getHeight());
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// This is not recorded but still causes clipping.
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recCanvas->androidFramework_setDeviceClipRestriction(layerDamage.toSkIRect());
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RenderNodeDrawable root(layerNode, recCanvas, false);
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root.forceDraw(recCanvas);
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// Now write this picture into the SKP canvas with an annotation indicating what it is
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mskpCanvas->drawAnnotation(layerDamage.toSkRect(), String8::format(
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"OffscreenLayerDraw|%" PRId64, layerNode->uniqueId()).c_str(), nullptr);
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mskpCanvas->drawPicture(layerRec.finishRecordingAsPicture());
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}
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LightingInfo::setLightCenterRaw(savedLightCenter);
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}
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SkCanvas* SkiaPipeline::tryCapture(SkSurface* surface, RenderNode* root,
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const LayerUpdateQueue& dirtyLayers) {
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if (CC_LIKELY(!Properties::skpCaptureEnabled)) {
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return surface->getCanvas(); // Bail out early when capture is not turned on.
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}
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// Note that shouldStartNewFileCapture tells us if this is the *first* frame of a capture.
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bool firstFrameOfAnim = false;
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if (shouldStartNewFileCapture() && mCaptureMode == CaptureMode::MultiFrameSKP) {
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// set a reminder to record every layer near the end of this method, after we have set up
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// the nway canvas.
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firstFrameOfAnim = true;
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if (!setupMultiFrameCapture()) {
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return surface->getCanvas();
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}
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}
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// Create a canvas pointer, fill it depending on what kind of capture is requested (if any)
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SkCanvas* pictureCanvas = nullptr;
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switch (mCaptureMode) {
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case CaptureMode::CallbackAPI:
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case CaptureMode::SingleFrameSKP:
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mRecorder.reset(new SkPictureRecorder());
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pictureCanvas = mRecorder->beginRecording(surface->width(), surface->height());
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break;
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case CaptureMode::MultiFrameSKP:
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// If a multi frame recording is active, initialize recording for a single frame of a
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// multi frame file.
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pictureCanvas = mMultiPic->beginPage(surface->width(), surface->height());
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break;
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case CaptureMode::None:
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// Returning here in the non-capture case means we can count on pictureCanvas being
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// non-null below.
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return surface->getCanvas();
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}
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// Setting up an nway canvas is common to any kind of capture.
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mNwayCanvas = std::make_unique<SkNWayCanvas>(surface->width(), surface->height());
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mNwayCanvas->addCanvas(surface->getCanvas());
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mNwayCanvas->addCanvas(pictureCanvas);
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if (firstFrameOfAnim) {
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// On the first frame of any mskp capture we want to record any layers that are needed in
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// frame but may have been rendered offscreen before recording began.
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// We do not maintain a list of all layers, since it isn't needed outside this rare,
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// recording use case. Traverse the tree to find them and put them in this LayerUpdateQueue.
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LayerUpdateQueue luq;
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collectLayers(root, &luq);
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recordLayers(luq, mNwayCanvas.get());
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} else {
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// on non-first frames, we record any normal layer draws (dirty regions)
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recordLayers(dirtyLayers, mNwayCanvas.get());
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}
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return mNwayCanvas.get();
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}
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void SkiaPipeline::endCapture(SkSurface* surface) {
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if (CC_LIKELY(mCaptureMode == CaptureMode::None)) { return; }
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mNwayCanvas.reset();
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ATRACE_CALL();
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if (mCaptureSequence > 0 && mCaptureMode == CaptureMode::MultiFrameSKP) {
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mMultiPic->endPage();
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mCaptureSequence--;
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if (mCaptureSequence == 0) {
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mCaptureMode = CaptureMode::None;
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// Pass mMultiPic and mOpenMultiPicStream to a background thread, which will handle
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// the heavyweight serialization work and destroy them. mOpenMultiPicStream is released
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// to a bare pointer because keeping it in a smart pointer makes the lambda
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// non-copyable. The lambda is only called once, so this is safe.
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SkFILEWStream* stream = mOpenMultiPicStream.release();
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CommonPool::post([doc = std::move(mMultiPic), stream]{
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ALOGD("Finalizing multi frame SKP");
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doc->close();
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delete stream;
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ALOGD("Multi frame SKP complete.");
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});
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}
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} else {
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sk_sp<SkPicture> picture = mRecorder->finishRecordingAsPicture();
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if (picture->approximateOpCount() > 0) {
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if (mPictureCapturedCallback) {
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std::invoke(mPictureCapturedCallback, std::move(picture));
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} else {
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// single frame skp to file
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SkSerialProcs procs;
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procs.fTypefaceProc = [](SkTypeface* tf, void* ctx){
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return tf->serialize(SkTypeface::SerializeBehavior::kDoIncludeData);
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};
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auto data = picture->serialize();
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savePictureAsync(data, mCapturedFile);
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mCaptureSequence = 0;
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mCaptureMode = CaptureMode::None;
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}
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}
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mRecorder.reset();
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}
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}
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void SkiaPipeline::renderFrame(const LayerUpdateQueue& layers, const SkRect& clip,
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const std::vector<sp<RenderNode>>& nodes, bool opaque,
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const Rect& contentDrawBounds, sk_sp<SkSurface> surface,
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const SkMatrix& preTransform) {
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bool previousSkpEnabled = Properties::skpCaptureEnabled;
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if (mPictureCapturedCallback) {
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Properties::skpCaptureEnabled = true;
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}
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// Initialize the canvas for the current frame, that might be a recording canvas if SKP
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// capture is enabled.
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SkCanvas* canvas = tryCapture(surface.get(), nodes[0].get(), layers);
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// draw all layers up front
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renderLayersImpl(layers, opaque);
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renderFrameImpl(clip, nodes, opaque, contentDrawBounds, canvas, preTransform);
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endCapture(surface.get());
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if (CC_UNLIKELY(Properties::debugOverdraw)) {
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renderOverdraw(clip, nodes, contentDrawBounds, surface, preTransform);
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}
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ATRACE_NAME("flush commands");
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surface->flushAndSubmit();
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Properties::skpCaptureEnabled = previousSkpEnabled;
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}
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namespace {
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static Rect nodeBounds(RenderNode& node) {
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auto& props = node.properties();
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return Rect(props.getLeft(), props.getTop(), props.getRight(), props.getBottom());
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}
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} // namespace
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void SkiaPipeline::renderFrameImpl(const SkRect& clip,
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const std::vector<sp<RenderNode>>& nodes, bool opaque,
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const Rect& contentDrawBounds, SkCanvas* canvas,
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const SkMatrix& preTransform) {
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SkAutoCanvasRestore saver(canvas, true);
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auto clipRestriction = preTransform.mapRect(clip).roundOut();
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if (CC_UNLIKELY(mCaptureMode == CaptureMode::SingleFrameSKP
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|| mCaptureMode == CaptureMode::MultiFrameSKP)) {
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canvas->drawAnnotation(SkRect::Make(clipRestriction), "AndroidDeviceClipRestriction",
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nullptr);
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} else {
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// clip drawing to dirty region only when not recording SKP files (which should contain all
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// draw ops on every frame)
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canvas->androidFramework_setDeviceClipRestriction(clipRestriction);
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}
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canvas->concat(preTransform);
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// STOPSHIP: Revert, temporary workaround to clear always F16 frame buffer for b/74976293
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if (!opaque || getSurfaceColorType() == kRGBA_F16_SkColorType) {
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canvas->clear(SK_ColorTRANSPARENT);
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}
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if (1 == nodes.size()) {
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if (!nodes[0]->nothingToDraw()) {
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RenderNodeDrawable root(nodes[0].get(), canvas);
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root.draw(canvas);
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}
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} else if (0 == nodes.size()) {
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// nothing to draw
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} else {
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// It there are multiple render nodes, they are laid out as follows:
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// #0 - backdrop (content + caption)
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// #1 - content (local bounds are at (0,0), will be translated and clipped to backdrop)
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// #2 - additional overlay nodes
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// Usually the backdrop cannot be seen since it will be entirely covered by the content.
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// While
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// resizing however it might become partially visible. The following render loop will crop
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// the
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// backdrop against the content and draw the remaining part of it. It will then draw the
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// content
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// cropped to the backdrop (since that indicates a shrinking of the window).
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//
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// Additional nodes will be drawn on top with no particular clipping semantics.
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// Usually the contents bounds should be mContentDrawBounds - however - we will
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// move it towards the fixed edge to give it a more stable appearance (for the moment).
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// If there is no content bounds we ignore the layering as stated above and start with 2.
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// Backdrop bounds in render target space
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const Rect backdrop = nodeBounds(*nodes[0]);
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// Bounds that content will fill in render target space (note content node bounds may be
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// bigger)
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Rect content(contentDrawBounds.getWidth(), contentDrawBounds.getHeight());
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content.translate(backdrop.left, backdrop.top);
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if (!content.contains(backdrop) && !nodes[0]->nothingToDraw()) {
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// Content doesn't entirely overlap backdrop, so fill around content (right/bottom)
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// Note: in the future, if content doesn't snap to backdrop's left/top, this may need to
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// also fill left/top. Currently, both 2up and freeform position content at the top/left
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// of
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// the backdrop, so this isn't necessary.
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RenderNodeDrawable backdropNode(nodes[0].get(), canvas);
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if (content.right < backdrop.right) {
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// draw backdrop to right side of content
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SkAutoCanvasRestore acr(canvas, true);
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canvas->clipRect(SkRect::MakeLTRB(content.right, backdrop.top, backdrop.right,
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backdrop.bottom));
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backdropNode.draw(canvas);
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}
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if (content.bottom < backdrop.bottom) {
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// draw backdrop to bottom of content
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// Note: bottom fill uses content left/right, to avoid overdrawing left/right fill
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SkAutoCanvasRestore acr(canvas, true);
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canvas->clipRect(SkRect::MakeLTRB(content.left, content.bottom, content.right,
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backdrop.bottom));
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backdropNode.draw(canvas);
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}
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}
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RenderNodeDrawable contentNode(nodes[1].get(), canvas);
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if (!backdrop.isEmpty()) {
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// content node translation to catch up with backdrop
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float dx = backdrop.left - contentDrawBounds.left;
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float dy = backdrop.top - contentDrawBounds.top;
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SkAutoCanvasRestore acr(canvas, true);
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canvas->translate(dx, dy);
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const SkRect contentLocalClip =
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SkRect::MakeXYWH(contentDrawBounds.left, contentDrawBounds.top,
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backdrop.getWidth(), backdrop.getHeight());
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canvas->clipRect(contentLocalClip);
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contentNode.draw(canvas);
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} else {
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SkAutoCanvasRestore acr(canvas, true);
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contentNode.draw(canvas);
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}
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// remaining overlay nodes, simply defer
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for (size_t index = 2; index < nodes.size(); index++) {
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if (!nodes[index]->nothingToDraw()) {
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SkAutoCanvasRestore acr(canvas, true);
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RenderNodeDrawable overlayNode(nodes[index].get(), canvas);
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overlayNode.draw(canvas);
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}
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}
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}
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}
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void SkiaPipeline::dumpResourceCacheUsage() const {
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int resources;
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size_t bytes;
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mRenderThread.getGrContext()->getResourceCacheUsage(&resources, &bytes);
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size_t maxBytes = mRenderThread.getGrContext()->getResourceCacheLimit();
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SkString log("Resource Cache Usage:\n");
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log.appendf("%8d items\n", resources);
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log.appendf("%8zu bytes (%.2f MB) out of %.2f MB maximum\n", bytes,
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bytes * (1.0f / (1024.0f * 1024.0f)), maxBytes * (1.0f / (1024.0f * 1024.0f)));
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ALOGD("%s", log.c_str());
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}
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void SkiaPipeline::setSurfaceColorProperties(ColorMode colorMode) {
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mColorMode = colorMode;
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switch (colorMode) {
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case ColorMode::Default:
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mSurfaceColorType = SkColorType::kN32_SkColorType;
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mSurfaceColorSpace = SkColorSpace::MakeSRGB();
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break;
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case ColorMode::WideColorGamut:
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mSurfaceColorType = DeviceInfo::get()->getWideColorType();
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mSurfaceColorSpace = DeviceInfo::get()->getWideColorSpace();
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break;
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case ColorMode::Hdr:
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mSurfaceColorType = SkColorType::kRGBA_F16_SkColorType;
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mSurfaceColorSpace = SkColorSpace::MakeRGB(GetPQSkTransferFunction(), SkNamedGamut::kRec2020);
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break;
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case ColorMode::Hdr10:
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mSurfaceColorType = SkColorType::kRGBA_1010102_SkColorType;
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mSurfaceColorSpace = SkColorSpace::MakeRGB(GetPQSkTransferFunction(), SkNamedGamut::kRec2020);
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break;
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}
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}
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// Overdraw debugging
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// These colors should be kept in sync with Caches::getOverdrawColor() with a few differences.
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// This implementation requires transparent entries for "no overdraw" and "single draws".
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static const SkColor kOverdrawColors[2][6] = {
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{
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0x00000000,
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0x00000000,
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0x2f0000ff,
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0x2f00ff00,
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0x3fff0000,
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0x7fff0000,
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},
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{
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0x00000000,
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0x00000000,
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0x2f0000ff,
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0x4fffff00,
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0x5fff89d7,
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0x7fff0000,
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},
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};
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void SkiaPipeline::renderOverdraw(const SkRect& clip,
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const std::vector<sp<RenderNode>>& nodes,
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const Rect& contentDrawBounds, sk_sp<SkSurface> surface,
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const SkMatrix& preTransform) {
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// Set up the overdraw canvas.
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SkImageInfo offscreenInfo = SkImageInfo::MakeA8(surface->width(), surface->height());
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sk_sp<SkSurface> offscreen = surface->makeSurface(offscreenInfo);
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LOG_ALWAYS_FATAL_IF(!offscreen, "Failed to create offscreen SkSurface for overdraw viz.");
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SkOverdrawCanvas overdrawCanvas(offscreen->getCanvas());
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// Fake a redraw to replay the draw commands. This will increment the alpha channel
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// each time a pixel would have been drawn.
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// Pass true for opaque so we skip the clear - the overdrawCanvas is already zero
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// initialized.
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renderFrameImpl(clip, nodes, true, contentDrawBounds, &overdrawCanvas, preTransform);
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sk_sp<SkImage> counts = offscreen->makeImageSnapshot();
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// Draw overdraw colors to the canvas. The color filter will convert counts to colors.
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SkPaint paint;
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const SkColor* colors = kOverdrawColors[static_cast<int>(Properties::overdrawColorSet)];
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paint.setColorFilter(SkOverdrawColorFilter::MakeWithSkColors(colors));
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surface->getCanvas()->drawImage(counts.get(), 0.0f, 0.0f, &paint);
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}
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} /* namespace skiapipeline */
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} /* namespace uirenderer */
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} /* namespace android */
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