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/*
* Copyright (C) 2016 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 "RenderNodeDrawable.h"
#include <SkPaintFilterCanvas.h>
#include "RenderNode.h"
#include "SkiaDisplayList.h"
#include "SkiaPipeline.h"
#include "utils/TraceUtils.h"
namespace android {
namespace uirenderer {
namespace skiapipeline {
RenderNodeDrawable::RenderNodeDrawable(RenderNode* node, SkCanvas* canvas, bool composeLayer,
bool inReorderingSection)
: mRenderNode(node)
, mRecordedTransform(canvas->getTotalMatrix())
, mComposeLayer(composeLayer)
, mInReorderingSection(inReorderingSection) {}
RenderNodeDrawable::~RenderNodeDrawable() {
// Just here to move the destructor into the cpp file where we can access RenderNode.
// TODO: Detangle the header nightmare.
}
void RenderNodeDrawable::drawBackwardsProjectedNodes(SkCanvas* canvas,
const SkiaDisplayList& displayList,
int nestLevel) {
LOG_ALWAYS_FATAL_IF(0 == nestLevel && !displayList.mProjectionReceiver);
for (auto& child : displayList.mChildNodes) {
const RenderProperties& childProperties = child.getNodeProperties();
// immediate children cannot be projected on their parent
if (childProperties.getProjectBackwards() && nestLevel > 0) {
SkAutoCanvasRestore acr2(canvas, true);
// Apply recorded matrix, which is a total matrix saved at recording time to avoid
// replaying all DL commands.
canvas->concat(child.getRecordedMatrix());
child.drawContent(canvas);
}
// skip walking sub-nodes if current display list contains a receiver with exception of
// level 0, which is a known receiver
if (0 == nestLevel || !displayList.containsProjectionReceiver()) {
SkAutoCanvasRestore acr(canvas, true);
SkMatrix nodeMatrix;
mat4 hwuiMatrix(child.getRecordedMatrix());
auto childNode = child.getRenderNode();
childNode->applyViewPropertyTransforms(hwuiMatrix);
hwuiMatrix.copyTo(nodeMatrix);
canvas->concat(nodeMatrix);
SkiaDisplayList* childDisplayList = static_cast<SkiaDisplayList*>(
(const_cast<DisplayList*>(childNode->getDisplayList())));
if (childDisplayList) {
drawBackwardsProjectedNodes(canvas, *childDisplayList, nestLevel + 1);
}
}
}
}
static void clipOutline(const Outline& outline, SkCanvas* canvas, const SkRect* pendingClip) {
Rect possibleRect;
float radius;
/* To match the existing HWUI behavior we only supports rectangles or
* rounded rectangles; passing in a more complicated outline fails silently.
*/
if (!outline.getAsRoundRect(&possibleRect, &radius)) {
if (pendingClip) {
canvas->clipRect(*pendingClip);
}
return;
}
SkRect rect = possibleRect.toSkRect();
if (radius != 0.0f) {
if (pendingClip && !pendingClip->contains(rect)) {
canvas->clipRect(*pendingClip);
}
canvas->clipRRect(SkRRect::MakeRectXY(rect, radius, radius), SkClipOp::kIntersect, true);
} else {
if (pendingClip) {
(void)rect.intersect(*pendingClip);
}
canvas->clipRect(rect);
}
}
const RenderProperties& RenderNodeDrawable::getNodeProperties() const {
return mRenderNode->properties();
}
void RenderNodeDrawable::onDraw(SkCanvas* canvas) {
// negative and positive Z order are drawn out of order, if this render node drawable is in
// a reordering section
if ((!mInReorderingSection) || MathUtils::isZero(mRenderNode->properties().getZ())) {
this->forceDraw(canvas);
}
}
void RenderNodeDrawable::forceDraw(SkCanvas* canvas) {
RenderNode* renderNode = mRenderNode.get();
if (CC_UNLIKELY(Properties::skpCaptureEnabled)) {
SkRect dimensions = SkRect::MakeWH(renderNode->getWidth(), renderNode->getHeight());
canvas->drawAnnotation(dimensions, renderNode->getName(), nullptr);
}
// We only respect the nothingToDraw check when we are composing a layer. This
// ensures that we paint the layer even if it is not currently visible in the
// event that the properties change and it becomes visible.
if ((mProjectedDisplayList == nullptr && !renderNode->isRenderable()) ||
(renderNode->nothingToDraw() && mComposeLayer)) {
return;
}
SkiaDisplayList* displayList = (SkiaDisplayList*)renderNode->getDisplayList();
SkAutoCanvasRestore acr(canvas, true);
const RenderProperties& properties = this->getNodeProperties();
// pass this outline to the children that may clip backward projected nodes
displayList->mProjectedOutline =
displayList->containsProjectionReceiver() ? &properties.getOutline() : nullptr;
if (!properties.getProjectBackwards()) {
drawContent(canvas);
if (mProjectedDisplayList) {
acr.restore(); // draw projected children using parent matrix
LOG_ALWAYS_FATAL_IF(!mProjectedDisplayList->mProjectedOutline);
const bool shouldClip = mProjectedDisplayList->mProjectedOutline->getPath();
SkAutoCanvasRestore acr2(canvas, shouldClip);
canvas->setMatrix(mProjectedDisplayList->mParentMatrix);
if (shouldClip) {
clipOutline(*mProjectedDisplayList->mProjectedOutline, canvas, nullptr);
}
drawBackwardsProjectedNodes(canvas, *mProjectedDisplayList);
}
}
displayList->mProjectedOutline = nullptr;
}
static bool layerNeedsPaint(const LayerProperties& properties, float alphaMultiplier,
SkPaint* paint) {
paint->setFilterQuality(kLow_SkFilterQuality);
if (alphaMultiplier < 1.0f || properties.alpha() < 255 ||
properties.xferMode() != SkBlendMode::kSrcOver || properties.getColorFilter() != nullptr) {
paint->setAlpha(properties.alpha() * alphaMultiplier);
paint->setBlendMode(properties.xferMode());
paint->setColorFilter(sk_ref_sp(properties.getColorFilter()));
return true;
}
return false;
}
class AlphaFilterCanvas : public SkPaintFilterCanvas {
public:
AlphaFilterCanvas(SkCanvas* canvas, float alpha) : SkPaintFilterCanvas(canvas), mAlpha(alpha) {}
protected:
bool onFilter(SkTCopyOnFirstWrite<SkPaint>* paint, Type t) const override {
SkTLazy<SkPaint> defaultPaint;
if (!*paint) {
paint->init(*defaultPaint.init());
}
paint->writable()->setAlpha((uint8_t)(*paint)->getAlpha() * mAlpha);
return true;
}
void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override {
// We unroll the drawable using "this" canvas, so that draw calls contained inside will
// get their alpha applied. THe default SkPaintFilterCanvas::onDrawDrawable does not unroll.
drawable->draw(this, matrix);
}
private:
float mAlpha;
};
void RenderNodeDrawable::drawContent(SkCanvas* canvas) const {
RenderNode* renderNode = mRenderNode.get();
float alphaMultiplier = 1.0f;
const RenderProperties& properties = renderNode->properties();
// If we are drawing the contents of layer, we don't want to apply any of
// the RenderNode's properties during this pass. Those will all be applied
// when the layer is composited.
if (mComposeLayer) {
setViewProperties(properties, canvas, &alphaMultiplier);
}
SkiaDisplayList* displayList = (SkiaDisplayList*)mRenderNode->getDisplayList();
displayList->mParentMatrix = canvas->getTotalMatrix();
// TODO should we let the bound of the drawable do this for us?
const SkRect bounds = SkRect::MakeWH(properties.getWidth(), properties.getHeight());
bool quickRejected = properties.getClipToBounds() && canvas->quickReject(bounds);
if (!quickRejected) {
SkiaDisplayList* displayList = (SkiaDisplayList*)renderNode->getDisplayList();
const LayerProperties& layerProperties = properties.layerProperties();
// composing a hardware layer
if (renderNode->getLayerSurface() && mComposeLayer) {
SkASSERT(properties.effectiveLayerType() == LayerType::RenderLayer);
SkPaint paint;
layerNeedsPaint(layerProperties, alphaMultiplier, &paint);
// surfaces for layers are created on LAYER_SIZE boundaries (which are >= layer size) so
// we need to restrict the portion of the surface drawn to the size of the renderNode.
SkASSERT(renderNode->getLayerSurface()->width() >= bounds.width());
SkASSERT(renderNode->getLayerSurface()->height() >= bounds.height());
canvas->drawImageRect(renderNode->getLayerSurface()->makeImageSnapshot().get(),
bounds, bounds, &paint);
if (!renderNode->getSkiaLayer()->hasRenderedSinceRepaint) {
renderNode->getSkiaLayer()->hasRenderedSinceRepaint = true;
if (CC_UNLIKELY(Properties::debugLayersUpdates)) {
SkPaint layerPaint;
layerPaint.setColor(0x7f00ff00);
canvas->drawRect(bounds, layerPaint);
} else if (CC_UNLIKELY(Properties::debugOverdraw)) {
// Render transparent rect to increment overdraw for repaint area.
// This can be "else if" because flashing green on layer updates
// will also increment the overdraw if it happens to be turned on.
SkPaint transparentPaint;
transparentPaint.setColor(SK_ColorTRANSPARENT);
canvas->drawRect(bounds, transparentPaint);
}
}
} else {
if (alphaMultiplier < 1.0f) {
// Non-layer draw for a view with getHasOverlappingRendering=false, will apply
// the alpha to the paint of each nested draw.
AlphaFilterCanvas alphaCanvas(canvas, alphaMultiplier);
displayList->draw(&alphaCanvas);
} else {
displayList->draw(canvas);
}
}
}
}
void RenderNodeDrawable::setViewProperties(const RenderProperties& properties, SkCanvas* canvas,
float* alphaMultiplier) {
if (properties.getLeft() != 0 || properties.getTop() != 0) {
canvas->translate(properties.getLeft(), properties.getTop());
}
if (properties.getStaticMatrix()) {
canvas->concat(*properties.getStaticMatrix());
} else if (properties.getAnimationMatrix()) {
canvas->concat(*properties.getAnimationMatrix());
}
if (properties.hasTransformMatrix()) {
if (properties.isTransformTranslateOnly()) {
canvas->translate(properties.getTranslationX(), properties.getTranslationY());
} else {
canvas->concat(*properties.getTransformMatrix());
}
}
const bool isLayer = properties.effectiveLayerType() != LayerType::None;
int clipFlags = properties.getClippingFlags();
if (properties.getAlpha() < 1) {
if (isLayer) {
clipFlags &= ~CLIP_TO_BOUNDS; // bounds clipping done by layer
}
if (CC_LIKELY(isLayer || !properties.getHasOverlappingRendering())) {
*alphaMultiplier = properties.getAlpha();
} else {
// savelayer needed to create an offscreen buffer
Rect layerBounds(0, 0, properties.getWidth(), properties.getHeight());
if (clipFlags) {
properties.getClippingRectForFlags(clipFlags, &layerBounds);
clipFlags = 0; // all clipping done by savelayer
}
SkRect bounds = SkRect::MakeLTRB(layerBounds.left, layerBounds.top, layerBounds.right,
layerBounds.bottom);
canvas->saveLayerAlpha(&bounds, (int)(properties.getAlpha() * 255));
}
if (CC_UNLIKELY(ATRACE_ENABLED() && properties.promotedToLayer())) {
// pretend alpha always causes savelayer to warn about
// performance problem affecting old versions
ATRACE_FORMAT("alpha caused saveLayer %dx%d", properties.getWidth(),
properties.getHeight());
}
}
const SkRect* pendingClip = nullptr;
SkRect clipRect;
if (clipFlags) {
Rect tmpRect;
properties.getClippingRectForFlags(clipFlags, &tmpRect);
clipRect = tmpRect.toSkRect();
pendingClip = &clipRect;
}
if (properties.getRevealClip().willClip()) {
canvas->clipPath(*properties.getRevealClip().getPath(), SkClipOp::kIntersect, true);
} else if (properties.getOutline().willClip()) {
clipOutline(properties.getOutline(), canvas, pendingClip);
pendingClip = nullptr;
}
if (pendingClip) {
canvas->clipRect(*pendingClip);
}
}
}; // namespace skiapipeline
}; // namespace uirenderer
}; // namespace android