libs/hwui/DisplayListCanvas.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2010 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 "DisplayListCanvas.h"

 #include "ResourceCache.h"
 #include "DeferredDisplayList.h"
 #include "DeferredLayerUpdater.h"
 #include "DisplayListOp.h"
 #include "RenderNode.h"
 #include "utils/PaintUtils.h"

 #include <SkCamera.h>
 #include <SkCanvas.h>

 #include <private/hwui/DrawGlInfo.h>

 namespace android {
 namespace uirenderer {

 DisplayListCanvas::DisplayListCanvas()
     : mState(*this)
     , mResourceCache(ResourceCache::getInstance())
     , mDisplayListData(nullptr)
     , mTranslateX(0.0f)
     , mTranslateY(0.0f)
     , mHasDeferredTranslate(false)
     , mDeferredBarrierType(kBarrier_None)
     , mHighContrastText(false)
     , mRestoreSaveCount(-1) {
 }

 DisplayListCanvas::~DisplayListCanvas() {
     LOG_ALWAYS_FATAL_IF(mDisplayListData,
             "Destroyed a DisplayListCanvas during a record!");
 }

 ///////////////////////////////////////////////////////////////////////////////
 // Operations
 ///////////////////////////////////////////////////////////////////////////////

 DisplayListData* DisplayListCanvas::finishRecording() {
     mPaintMap.clear();
     mRegionMap.clear();
     mPathMap.clear();
     DisplayListData* data = mDisplayListData;
     mDisplayListData = nullptr;
     mSkiaCanvasProxy.reset(nullptr);
     return data;
 }

 void DisplayListCanvas::prepareDirty(float left, float top,
         float right, float bottom) {

     LOG_ALWAYS_FATAL_IF(mDisplayListData,
             "prepareDirty called a second time during a recording!");
     mDisplayListData = new DisplayListData();

     mState.initializeSaveStack(0, 0, mState.getWidth(), mState.getHeight(), Vector3());

     mDeferredBarrierType = kBarrier_InOrder;
     mState.setDirtyClip(false);
     mRestoreSaveCount = -1;
 }

 bool DisplayListCanvas::finish() {
     flushRestoreToCount();
     flushTranslate();
     return false;
 }

 void DisplayListCanvas::interrupt() {
 }

 void DisplayListCanvas::resume() {
 }

 void DisplayListCanvas::callDrawGLFunction(Functor *functor) {
     addDrawOp(new (alloc()) DrawFunctorOp(functor));
     mDisplayListData->functors.add(functor);
 }

 SkCanvas* DisplayListCanvas::asSkCanvas() {
     LOG_ALWAYS_FATAL_IF(!mDisplayListData,
             "attempting to get an SkCanvas when we are not recording!");
     if (!mSkiaCanvasProxy) {
         mSkiaCanvasProxy.reset(new SkiaCanvasProxy(this));
     }
     return mSkiaCanvasProxy.get();
 }

 int DisplayListCanvas::save(SkCanvas::SaveFlags flags) {
     addStateOp(new (alloc()) SaveOp((int) flags));
     return mState.save((int) flags);
 }

 void DisplayListCanvas::restore() {
     if (mRestoreSaveCount < 0) {
         restoreToCount(getSaveCount() - 1);
         return;
     }

     mRestoreSaveCount--;
     flushTranslate();
     mState.restore();
 }

 void DisplayListCanvas::restoreToCount(int saveCount) {
     mRestoreSaveCount = saveCount;
     flushTranslate();
     mState.restoreToCount(saveCount);
 }

 int DisplayListCanvas::saveLayer(float left, float top, float right, float bottom,
         const SkPaint* paint, SkCanvas::SaveFlags flags) {
     // force matrix/clip isolation for layer
     flags |= SkCanvas::kClip_SaveFlag | SkCanvas::kMatrix_SaveFlag;

     paint = refPaint(paint);
     addStateOp(new (alloc()) SaveLayerOp(left, top, right, bottom, paint, (int) flags));
     return mState.save((int) flags);
 }

 void DisplayListCanvas::translate(float dx, float dy) {
     mHasDeferredTranslate = true;
     mTranslateX += dx;
     mTranslateY += dy;
     flushRestoreToCount();
     mState.translate(dx, dy, 0.0f);
 }

 void DisplayListCanvas::rotate(float degrees) {
     addStateOp(new (alloc()) RotateOp(degrees));
     mState.rotate(degrees);
 }

 void DisplayListCanvas::scale(float sx, float sy) {
     addStateOp(new (alloc()) ScaleOp(sx, sy));
     mState.scale(sx, sy);
 }

 void DisplayListCanvas::skew(float sx, float sy) {
     addStateOp(new (alloc()) SkewOp(sx, sy));
     mState.skew(sx, sy);
 }

 void DisplayListCanvas::setMatrix(const SkMatrix& matrix) {
     addStateOp(new (alloc()) SetMatrixOp(matrix));
     mState.setMatrix(matrix);
 }

 void DisplayListCanvas::concat(const SkMatrix& matrix) {
     addStateOp(new (alloc()) ConcatMatrixOp(matrix));
     mState.concatMatrix(matrix);
 }

 bool DisplayListCanvas::getClipBounds(SkRect* outRect) const {
     Rect bounds = mState.getLocalClipBounds();
     *outRect = SkRect::MakeLTRB(bounds.left, bounds.top, bounds.right, bounds.bottom);
     return !(outRect->isEmpty());
 }

 bool DisplayListCanvas::quickRejectRect(float left, float top, float right, float bottom) const {
     return mState.quickRejectConservative(left, top, right, bottom);
 }

 bool DisplayListCanvas::quickRejectPath(const SkPath& path) const {
     SkRect bounds = path.getBounds();
     return mState.quickRejectConservative(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom);
 }


 bool DisplayListCanvas::clipRect(float left, float top, float right, float bottom,
         SkRegion::Op op) {
     addStateOp(new (alloc()) ClipRectOp(left, top, right, bottom, op));
     return mState.clipRect(left, top, right, bottom, op);
 }

 bool DisplayListCanvas::clipPath(const SkPath* path, SkRegion::Op op) {
     path = refPath(path);
     addStateOp(new (alloc()) ClipPathOp(path, op));
     return mState.clipPath(path, op);
 }

 bool DisplayListCanvas::clipRegion(const SkRegion* region, SkRegion::Op op) {
     region = refRegion(region);
     addStateOp(new (alloc()) ClipRegionOp(region, op));
     return mState.clipRegion(region, op);
 }

 void DisplayListCanvas::drawRenderNode(RenderNode* renderNode) {
     LOG_ALWAYS_FATAL_IF(!renderNode, "missing rendernode");
     DrawRenderNodeOp* op = new (alloc()) DrawRenderNodeOp(
             renderNode,
             *mState.currentTransform(),
             mState.clipIsSimple());
     addRenderNodeOp(op);
 }

 void DisplayListCanvas::drawLayer(DeferredLayerUpdater* layerHandle, float x, float y) {
     // We ref the DeferredLayerUpdater due to its thread-safe ref-counting
     // semantics.
     mDisplayListData->ref(layerHandle);
     addDrawOp(new (alloc()) DrawLayerOp(layerHandle->backingLayer(), x, y));
 }

 void DisplayListCanvas::drawBitmap(const SkBitmap* bitmap, const SkPaint* paint) {
     bitmap = refBitmap(*bitmap);
     paint = refPaint(paint);

     addDrawOp(new (alloc()) DrawBitmapOp(bitmap, paint));
 }

 void DisplayListCanvas::drawBitmap(const SkBitmap& bitmap, float left, float top,
         const SkPaint* paint) {
     save(SkCanvas::kMatrix_SaveFlag);
     translate(left, top);
     drawBitmap(&bitmap, paint);
     restore();
 }

 void DisplayListCanvas::drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix,
         const SkPaint* paint) {
     if (matrix.isIdentity()) {
         drawBitmap(&bitmap, paint);
     } else if (!(matrix.getType() & ~(SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask))) {
         // SkMatrix::isScaleTranslate() not available in L
         SkRect src;
         SkRect dst;
         bitmap.getBounds(&src);
         matrix.mapRect(&dst, src);
         drawBitmap(bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
                    dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
     } else {
         save(SkCanvas::kMatrix_SaveFlag);
         concat(matrix);
         drawBitmap(&bitmap, paint);
         restore();
     }
 }

 void DisplayListCanvas::drawBitmap(const SkBitmap& bitmap, float srcLeft, float srcTop,
         float srcRight, float srcBottom, float dstLeft, float dstTop,
         float dstRight, float dstBottom, const SkPaint* paint) {
     if (srcLeft == 0 && srcTop == 0
             && srcRight == bitmap.width()
             && srcBottom == bitmap.height()
             && (srcBottom - srcTop == dstBottom - dstTop)
             && (srcRight - srcLeft == dstRight - dstLeft)) {
         // transform simple rect to rect drawing case into position bitmap ops, since they merge
         save(SkCanvas::kMatrix_SaveFlag);
         translate(dstLeft, dstTop);
         drawBitmap(&bitmap, paint);
         restore();
     } else {
         paint = refPaint(paint);

         if (paint && paint->getShader()) {
             float scaleX = (dstRight - dstLeft) / (srcRight - srcLeft);
             float scaleY = (dstBottom - dstTop) / (srcBottom - srcTop);
             if (!MathUtils::areEqual(scaleX, 1.0f) || !MathUtils::areEqual(scaleY, 1.0f)) {
                 // Apply the scale transform on the canvas, so that the shader
                 // effectively calculates positions relative to src rect space

                 save(SkCanvas::kMatrix_SaveFlag);
                 translate(dstLeft, dstTop);
                 scale(scaleX, scaleY);

                 dstLeft = 0.0f;
                 dstTop = 0.0f;
                 dstRight = srcRight - srcLeft;
                 dstBottom = srcBottom - srcTop;

                 addDrawOp(new (alloc()) DrawBitmapRectOp(refBitmap(bitmap),
                         srcLeft, srcTop, srcRight, srcBottom,
                         dstLeft, dstTop, dstRight, dstBottom, paint));
                 restore();
                 return;
             }
         }

         addDrawOp(new (alloc()) DrawBitmapRectOp(refBitmap(bitmap),
                 srcLeft, srcTop, srcRight, srcBottom,
                 dstLeft, dstTop, dstRight, dstBottom, paint));
     }
 }

 void DisplayListCanvas::drawBitmapMesh(const SkBitmap& bitmap, int meshWidth, int meshHeight,
         const float* vertices, const int* colors, const SkPaint* paint) {
     int vertexCount = (meshWidth + 1) * (meshHeight + 1);
     vertices = refBuffer<float>(vertices, vertexCount * 2); // 2 floats per vertex
     paint = refPaint(paint);
     colors = refBuffer<int>(colors, vertexCount); // 1 color per vertex

     addDrawOp(new (alloc()) DrawBitmapMeshOp(refBitmap(bitmap), meshWidth, meshHeight,
            vertices, colors, paint));
 }

 void DisplayListCanvas::drawPatch(const SkBitmap& bitmap, const Res_png_9patch* patch,
         float left, float top, float right, float bottom, const SkPaint* paint) {
     const SkBitmap* bitmapPtr = refBitmap(bitmap);
     patch = refPatch(patch);
     paint = refPaint(paint);

     addDrawOp(new (alloc()) DrawPatchOp(bitmapPtr, patch, left, top, right, bottom, paint));
 }

 void DisplayListCanvas::drawColor(int color, SkXfermode::Mode mode) {
     addDrawOp(new (alloc()) DrawColorOp(color, mode));
 }

 void DisplayListCanvas::drawPaint(const SkPaint& paint) {
     SkRect bounds;
     if (getClipBounds(&bounds)) {
         drawRect(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom, paint);
     }
 }


 void DisplayListCanvas::drawRect(float left, float top, float right, float bottom,
         const SkPaint& paint) {
     addDrawOp(new (alloc()) DrawRectOp(left, top, right, bottom, refPaint(&paint)));
 }

 void DisplayListCanvas::drawRoundRect(float left, float top, float right, float bottom,
         float rx, float ry, const SkPaint& paint) {
     addDrawOp(new (alloc()) DrawRoundRectOp(left, top, right, bottom, rx, ry, refPaint(&paint)));
 }

 void DisplayListCanvas::drawRoundRect(
         CanvasPropertyPrimitive* left, CanvasPropertyPrimitive* top,
         CanvasPropertyPrimitive* right, CanvasPropertyPrimitive* bottom,
         CanvasPropertyPrimitive* rx, CanvasPropertyPrimitive* ry,
         CanvasPropertyPaint* paint) {
     mDisplayListData->ref(left);
     mDisplayListData->ref(top);
     mDisplayListData->ref(right);
     mDisplayListData->ref(bottom);
     mDisplayListData->ref(rx);
     mDisplayListData->ref(ry);
     mDisplayListData->ref(paint);
     refBitmapsInShader(paint->value.getShader());
     addDrawOp(new (alloc()) DrawRoundRectPropsOp(&left->value, &top->value,
             &right->value, &bottom->value, &rx->value, &ry->value, &paint->value));
 }

 void DisplayListCanvas::drawCircle(float x, float y, float radius, const SkPaint& paint) {
     addDrawOp(new (alloc()) DrawCircleOp(x, y, radius, refPaint(&paint)));
 }

 void DisplayListCanvas::drawCircle(CanvasPropertyPrimitive* x, CanvasPropertyPrimitive* y,
         CanvasPropertyPrimitive* radius, CanvasPropertyPaint* paint) {
     mDisplayListData->ref(x);
     mDisplayListData->ref(y);
     mDisplayListData->ref(radius);
     mDisplayListData->ref(paint);
     refBitmapsInShader(paint->value.getShader());
     addDrawOp(new (alloc()) DrawCirclePropsOp(&x->value, &y->value,
             &radius->value, &paint->value));
 }

 void DisplayListCanvas::drawOval(float left, float top, float right, float bottom,
         const SkPaint& paint) {
     addDrawOp(new (alloc()) DrawOvalOp(left, top, right, bottom, refPaint(&paint)));
 }

 void DisplayListCanvas::drawArc(float left, float top, float right, float bottom,
         float startAngle, float sweepAngle, bool useCenter, const SkPaint& paint) {
     if (fabs(sweepAngle) >= 360.0f) {
         drawOval(left, top, right, bottom, paint);
     } else {
         addDrawOp(new (alloc()) DrawArcOp(left, top, right, bottom,
                         startAngle, sweepAngle, useCenter, refPaint(&paint)));
     }
 }

 void DisplayListCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
     addDrawOp(new (alloc()) DrawPathOp(refPath(&path), refPaint(&paint)));
 }

 void DisplayListCanvas::drawLines(const float* points, int count, const SkPaint& paint) {
     points = refBuffer<float>(points, count);

     addDrawOp(new (alloc()) DrawLinesOp(points, count, refPaint(&paint)));
 }

 void DisplayListCanvas::drawPoints(const float* points, int count, const SkPaint& paint) {
     points = refBuffer<float>(points, count);

     addDrawOp(new (alloc()) DrawPointsOp(points, count, refPaint(&paint)));
 }

 void DisplayListCanvas::drawTextOnPath(const uint16_t* glyphs, int count,
         const SkPath& path, float hOffset, float vOffset, const SkPaint& paint) {
     if (!glyphs || count <= 0) return;

     int bytesCount = 2 * count;
     DrawOp* op = new (alloc()) DrawTextOnPathOp(refText((const char*) glyphs, bytesCount),
             bytesCount, count, refPath(&path),
             hOffset, vOffset, refPaint(&paint));
     addDrawOp(op);
 }

 void DisplayListCanvas::drawPosText(const uint16_t* text, const float* positions,
         int count, int posCount, const SkPaint& paint) {
     if (!text || count <= 0) return;

     int bytesCount = 2 * count;
     positions = refBuffer<float>(positions, count * 2);

     DrawOp* op = new (alloc()) DrawPosTextOp(refText((const char*) text, bytesCount),
                                              bytesCount, count, positions, refPaint(&paint));
     addDrawOp(op);
 }

 static void simplifyPaint(int color, SkPaint* paint) {
     paint->setColor(color);
     paint->setShader(nullptr);
     paint->setColorFilter(nullptr);
     paint->setLooper(nullptr);
     paint->setStrokeWidth(4 + 0.04 * paint->getTextSize());
     paint->setStrokeJoin(SkPaint::kRound_Join);
     paint->setLooper(nullptr);
 }

 void DisplayListCanvas::drawText(const uint16_t* glyphs, const float* positions,
         int count, const SkPaint& paint, float x, float y,
         float boundsLeft, float boundsTop, float boundsRight, float boundsBottom,
         float totalAdvance) {

     if (!glyphs || count <= 0 || PaintUtils::paintWillNotDrawText(paint)) return;

     int bytesCount = count * 2;
     const char* text = refText((const char*) glyphs, bytesCount);
     positions = refBuffer<float>(positions, count * 2);
     Rect bounds(boundsLeft, boundsTop, boundsRight, boundsBottom);

     if (CC_UNLIKELY(mHighContrastText)) {
         // high contrast draw path
         int color = paint.getColor();
         int channelSum = SkColorGetR(color) + SkColorGetG(color) + SkColorGetB(color);
         bool darken = channelSum < (128 * 3);

         // outline
         SkPaint* outlinePaint = copyPaint(&paint);
         simplifyPaint(darken ? SK_ColorWHITE : SK_ColorBLACK, outlinePaint);
         outlinePaint->setStyle(SkPaint::kStrokeAndFill_Style);
         addDrawOp(new (alloc()) DrawTextOp(text, bytesCount, count,
                 x, y, positions, outlinePaint, totalAdvance, bounds)); // bounds?

         // inner
         SkPaint* innerPaint = copyPaint(&paint);
         simplifyPaint(darken ? SK_ColorBLACK : SK_ColorWHITE, innerPaint);
         innerPaint->setStyle(SkPaint::kFill_Style);
         addDrawOp(new (alloc()) DrawTextOp(text, bytesCount, count,
                 x, y, positions, innerPaint, totalAdvance, bounds));
     } else {
         // standard draw path
         DrawOp* op = new (alloc()) DrawTextOp(text, bytesCount, count,
                 x, y, positions, refPaint(&paint), totalAdvance, bounds);
         addDrawOp(op);
     }
 }

 void DisplayListCanvas::drawRects(const float* rects, int count, const SkPaint* paint) {
     if (count <= 0) return;

     rects = refBuffer<float>(rects, count);
     paint = refPaint(paint);
     addDrawOp(new (alloc()) DrawRectsOp(rects, count, paint));
 }

 void DisplayListCanvas::setDrawFilter(SkDrawFilter* filter) {
     mDrawFilter.reset(SkSafeRef(filter));
 }

 void DisplayListCanvas::insertReorderBarrier(bool enableReorder) {
     flushRestoreToCount();
     flushTranslate();
     mDeferredBarrierType = enableReorder ? kBarrier_OutOfOrder : kBarrier_InOrder;
 }

 void DisplayListCanvas::flushRestoreToCount() {
     if (mRestoreSaveCount >= 0) {
         addOpAndUpdateChunk(new (alloc()) RestoreToCountOp(mRestoreSaveCount));
         mRestoreSaveCount = -1;
     }
 }

 void DisplayListCanvas::flushTranslate() {
     if (mHasDeferredTranslate) {
         if (mTranslateX != 0.0f || mTranslateY != 0.0f) {
             addOpAndUpdateChunk(new (alloc()) TranslateOp(mTranslateX, mTranslateY));
             mTranslateX = mTranslateY = 0.0f;
         }
         mHasDeferredTranslate = false;
     }
 }

 size_t DisplayListCanvas::addOpAndUpdateChunk(DisplayListOp* op) {
     int insertIndex = mDisplayListData->displayListOps.add(op);
     if (mDeferredBarrierType != kBarrier_None) {
         // op is first in new chunk
         mDisplayListData->chunks.push();
         DisplayListData::Chunk& newChunk = mDisplayListData->chunks.editTop();
         newChunk.beginOpIndex = insertIndex;
         newChunk.endOpIndex = insertIndex + 1;
         newChunk.reorderChildren = (mDeferredBarrierType == kBarrier_OutOfOrder);

         int nextChildIndex = mDisplayListData->children().size();
         newChunk.beginChildIndex = newChunk.endChildIndex = nextChildIndex;
         mDeferredBarrierType = kBarrier_None;
     } else {
         // standard case - append to existing chunk
         mDisplayListData->chunks.editTop().endOpIndex = insertIndex + 1;
     }
     return insertIndex;
 }

 size_t DisplayListCanvas::flushAndAddOp(DisplayListOp* op) {
     flushRestoreToCount();
     flushTranslate();
     return addOpAndUpdateChunk(op);
 }

 size_t DisplayListCanvas::addStateOp(StateOp* op) {
     return flushAndAddOp(op);
 }

 size_t DisplayListCanvas::addDrawOp(DrawOp* op) {
     Rect localBounds;
     if (op->getLocalBounds(localBounds)) {
         bool rejected = quickRejectRect(localBounds.left, localBounds.top,
                 localBounds.right, localBounds.bottom);
         op->setQuickRejected(rejected);
     }

     mDisplayListData->hasDrawOps = true;
     return flushAndAddOp(op);
 }

 size_t DisplayListCanvas::addRenderNodeOp(DrawRenderNodeOp* op) {
     int opIndex = addDrawOp(op);
     int childIndex = mDisplayListData->addChild(op);

     // update the chunk's child indices
     DisplayListData::Chunk& chunk = mDisplayListData->chunks.editTop();
     chunk.endChildIndex = childIndex + 1;

     if (op->renderNode()->stagingProperties().isProjectionReceiver()) {
         // use staging property, since recording on UI thread
         mDisplayListData->projectionReceiveIndex = opIndex;
     }
     return opIndex;
 }

 void DisplayListCanvas::refBitmapsInShader(const SkShader* shader) {
     if (!shader) return;

     // If this paint has an SkShader that has an SkBitmap add
     // it to the bitmap pile
     SkBitmap bitmap;
     SkShader::TileMode xy[2];
     if (shader->asABitmap(&bitmap, nullptr, xy) == SkShader::kDefault_BitmapType) {
         refBitmap(bitmap);
         return;
     }
     SkShader::ComposeRec rec;
     if (shader->asACompose(&rec)) {
         refBitmapsInShader(rec.fShaderA);
         refBitmapsInShader(rec.fShaderB);
         return;
     }
 }

 }; // namespace uirenderer
 }; // namespace android
	/*
	* Copyright (C) 2010 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 "DisplayListCanvas.h"

	#include "ResourceCache.h"
	#include "DeferredDisplayList.h"
	#include "DeferredLayerUpdater.h"
	#include "DisplayListOp.h"
	#include "RenderNode.h"
	#include "utils/PaintUtils.h"

	#include <SkCamera.h>
	#include <SkCanvas.h>

	#include <private/hwui/DrawGlInfo.h>

	namespace android {
	namespace uirenderer {

	DisplayListCanvas::DisplayListCanvas()
	: mState(*this)
	, mResourceCache(ResourceCache::getInstance())
	, mDisplayListData(nullptr)
	, mTranslateX(0.0f)
	, mTranslateY(0.0f)
	, mHasDeferredTranslate(false)
	, mDeferredBarrierType(kBarrier_None)
	, mHighContrastText(false)
	, mRestoreSaveCount(-1) {
	}

	DisplayListCanvas::~DisplayListCanvas() {
	LOG_ALWAYS_FATAL_IF(mDisplayListData,
	"Destroyed a DisplayListCanvas during a record!");
	}

	///////////////////////////////////////////////////////////////////////////////
	// Operations
	///////////////////////////////////////////////////////////////////////////////

	DisplayListData* DisplayListCanvas::finishRecording() {
	mPaintMap.clear();
	mRegionMap.clear();
	mPathMap.clear();
	DisplayListData* data = mDisplayListData;
	mDisplayListData = nullptr;
	mSkiaCanvasProxy.reset(nullptr);
	return data;
	}

	void DisplayListCanvas::prepareDirty(float left, float top,
	float right, float bottom) {

	LOG_ALWAYS_FATAL_IF(mDisplayListData,
	"prepareDirty called a second time during a recording!");
	mDisplayListData = new DisplayListData();

	mState.initializeSaveStack(0, 0, mState.getWidth(), mState.getHeight(), Vector3());

	mDeferredBarrierType = kBarrier_InOrder;
	mState.setDirtyClip(false);
	mRestoreSaveCount = -1;
	}

	bool DisplayListCanvas::finish() {
	flushRestoreToCount();
	flushTranslate();
	return false;
	}

	void DisplayListCanvas::interrupt() {
	}

	void DisplayListCanvas::resume() {
	}

	void DisplayListCanvas::callDrawGLFunction(Functor *functor) {
	addDrawOp(new (alloc()) DrawFunctorOp(functor));
	mDisplayListData->functors.add(functor);
	}

	SkCanvas* DisplayListCanvas::asSkCanvas() {
	LOG_ALWAYS_FATAL_IF(!mDisplayListData,
	"attempting to get an SkCanvas when we are not recording!");
	if (!mSkiaCanvasProxy) {
	mSkiaCanvasProxy.reset(new SkiaCanvasProxy(this));
	}
	return mSkiaCanvasProxy.get();
	}

	int DisplayListCanvas::save(SkCanvas::SaveFlags flags) {
	addStateOp(new (alloc()) SaveOp((int) flags));
	return mState.save((int) flags);
	}

	void DisplayListCanvas::restore() {
	if (mRestoreSaveCount < 0) {
	restoreToCount(getSaveCount() - 1);
	return;
	}

	mRestoreSaveCount--;
	flushTranslate();
	mState.restore();
	}

	void DisplayListCanvas::restoreToCount(int saveCount) {
	mRestoreSaveCount = saveCount;
	flushTranslate();
	mState.restoreToCount(saveCount);
	}

	int DisplayListCanvas::saveLayer(float left, float top, float right, float bottom,
	const SkPaint* paint, SkCanvas::SaveFlags flags) {
	// force matrix/clip isolation for layer
	flags \|= SkCanvas::kClip_SaveFlag \| SkCanvas::kMatrix_SaveFlag;

	paint = refPaint(paint);
	addStateOp(new (alloc()) SaveLayerOp(left, top, right, bottom, paint, (int) flags));
	return mState.save((int) flags);
	}

	void DisplayListCanvas::translate(float dx, float dy) {
	mHasDeferredTranslate = true;
	mTranslateX += dx;
	mTranslateY += dy;
	flushRestoreToCount();
	mState.translate(dx, dy, 0.0f);
	}

	void DisplayListCanvas::rotate(float degrees) {
	addStateOp(new (alloc()) RotateOp(degrees));
	mState.rotate(degrees);
	}

	void DisplayListCanvas::scale(float sx, float sy) {
	addStateOp(new (alloc()) ScaleOp(sx, sy));
	mState.scale(sx, sy);
	}

	void DisplayListCanvas::skew(float sx, float sy) {
	addStateOp(new (alloc()) SkewOp(sx, sy));
	mState.skew(sx, sy);
	}

	void DisplayListCanvas::setMatrix(const SkMatrix& matrix) {
	addStateOp(new (alloc()) SetMatrixOp(matrix));
	mState.setMatrix(matrix);
	}

	void DisplayListCanvas::concat(const SkMatrix& matrix) {
	addStateOp(new (alloc()) ConcatMatrixOp(matrix));
	mState.concatMatrix(matrix);
	}

	bool DisplayListCanvas::getClipBounds(SkRect* outRect) const {
	Rect bounds = mState.getLocalClipBounds();
	*outRect = SkRect::MakeLTRB(bounds.left, bounds.top, bounds.right, bounds.bottom);
	return !(outRect->isEmpty());
	}

	bool DisplayListCanvas::quickRejectRect(float left, float top, float right, float bottom) const {
	return mState.quickRejectConservative(left, top, right, bottom);
	}

	bool DisplayListCanvas::quickRejectPath(const SkPath& path) const {
	SkRect bounds = path.getBounds();
	return mState.quickRejectConservative(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom);
	}


	bool DisplayListCanvas::clipRect(float left, float top, float right, float bottom,
	SkRegion::Op op) {
	addStateOp(new (alloc()) ClipRectOp(left, top, right, bottom, op));
	return mState.clipRect(left, top, right, bottom, op);
	}

	bool DisplayListCanvas::clipPath(const SkPath* path, SkRegion::Op op) {
	path = refPath(path);
	addStateOp(new (alloc()) ClipPathOp(path, op));
	return mState.clipPath(path, op);
	}

	bool DisplayListCanvas::clipRegion(const SkRegion* region, SkRegion::Op op) {
	region = refRegion(region);
	addStateOp(new (alloc()) ClipRegionOp(region, op));
	return mState.clipRegion(region, op);
	}

	void DisplayListCanvas::drawRenderNode(RenderNode* renderNode) {
	LOG_ALWAYS_FATAL_IF(!renderNode, "missing rendernode");
	DrawRenderNodeOp* op = new (alloc()) DrawRenderNodeOp(
	renderNode,
	*mState.currentTransform(),
	mState.clipIsSimple());
	addRenderNodeOp(op);
	}

	void DisplayListCanvas::drawLayer(DeferredLayerUpdater* layerHandle, float x, float y) {
	// We ref the DeferredLayerUpdater due to its thread-safe ref-counting
	// semantics.
	mDisplayListData->ref(layerHandle);
	addDrawOp(new (alloc()) DrawLayerOp(layerHandle->backingLayer(), x, y));
	}

	void DisplayListCanvas::drawBitmap(const SkBitmap* bitmap, const SkPaint* paint) {
	bitmap = refBitmap(*bitmap);
	paint = refPaint(paint);

	addDrawOp(new (alloc()) DrawBitmapOp(bitmap, paint));
	}

	void DisplayListCanvas::drawBitmap(const SkBitmap& bitmap, float left, float top,
	const SkPaint* paint) {
	save(SkCanvas::kMatrix_SaveFlag);
	translate(left, top);
	drawBitmap(&bitmap, paint);
	restore();
	}

	void DisplayListCanvas::drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix,
	const SkPaint* paint) {
	if (matrix.isIdentity()) {
	drawBitmap(&bitmap, paint);
	} else if (!(matrix.getType() & ~(SkMatrix::kScale_Mask \| SkMatrix::kTranslate_Mask))) {
	// SkMatrix::isScaleTranslate() not available in L
	SkRect src;
	SkRect dst;
	bitmap.getBounds(&src);
	matrix.mapRect(&dst, src);
	drawBitmap(bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
	dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
	} else {
	save(SkCanvas::kMatrix_SaveFlag);
	concat(matrix);
	drawBitmap(&bitmap, paint);
	restore();
	}
	}

	void DisplayListCanvas::drawBitmap(const SkBitmap& bitmap, float srcLeft, float srcTop,
	float srcRight, float srcBottom, float dstLeft, float dstTop,
	float dstRight, float dstBottom, const SkPaint* paint) {
	if (srcLeft == 0 && srcTop == 0
	&& srcRight == bitmap.width()
	&& srcBottom == bitmap.height()
	&& (srcBottom - srcTop == dstBottom - dstTop)
	&& (srcRight - srcLeft == dstRight - dstLeft)) {
	// transform simple rect to rect drawing case into position bitmap ops, since they merge
	save(SkCanvas::kMatrix_SaveFlag);
	translate(dstLeft, dstTop);
	drawBitmap(&bitmap, paint);
	restore();
	} else {
	paint = refPaint(paint);

	if (paint && paint->getShader()) {
	float scaleX = (dstRight - dstLeft) / (srcRight - srcLeft);
	float scaleY = (dstBottom - dstTop) / (srcBottom - srcTop);
	if (!MathUtils::areEqual(scaleX, 1.0f) \|\| !MathUtils::areEqual(scaleY, 1.0f)) {
	// Apply the scale transform on the canvas, so that the shader
	// effectively calculates positions relative to src rect space

	save(SkCanvas::kMatrix_SaveFlag);
	translate(dstLeft, dstTop);
	scale(scaleX, scaleY);

	dstLeft = 0.0f;
	dstTop = 0.0f;
	dstRight = srcRight - srcLeft;
	dstBottom = srcBottom - srcTop;

	addDrawOp(new (alloc()) DrawBitmapRectOp(refBitmap(bitmap),
	srcLeft, srcTop, srcRight, srcBottom,
	dstLeft, dstTop, dstRight, dstBottom, paint));
	restore();
	return;
	}
	}

	addDrawOp(new (alloc()) DrawBitmapRectOp(refBitmap(bitmap),
	srcLeft, srcTop, srcRight, srcBottom,
	dstLeft, dstTop, dstRight, dstBottom, paint));
	}
	}

	void DisplayListCanvas::drawBitmapMesh(const SkBitmap& bitmap, int meshWidth, int meshHeight,
	const float* vertices, const int* colors, const SkPaint* paint) {
	int vertexCount = (meshWidth + 1) * (meshHeight + 1);
	vertices = refBuffer<float>(vertices, vertexCount * 2); // 2 floats per vertex
	paint = refPaint(paint);
	colors = refBuffer<int>(colors, vertexCount); // 1 color per vertex

	addDrawOp(new (alloc()) DrawBitmapMeshOp(refBitmap(bitmap), meshWidth, meshHeight,
	vertices, colors, paint));
	}

	void DisplayListCanvas::drawPatch(const SkBitmap& bitmap, const Res_png_9patch* patch,
	float left, float top, float right, float bottom, const SkPaint* paint) {
	const SkBitmap* bitmapPtr = refBitmap(bitmap);
	patch = refPatch(patch);
	paint = refPaint(paint);

	addDrawOp(new (alloc()) DrawPatchOp(bitmapPtr, patch, left, top, right, bottom, paint));
	}

	void DisplayListCanvas::drawColor(int color, SkXfermode::Mode mode) {
	addDrawOp(new (alloc()) DrawColorOp(color, mode));
	}

	void DisplayListCanvas::drawPaint(const SkPaint& paint) {
	SkRect bounds;
	if (getClipBounds(&bounds)) {
	drawRect(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom, paint);
	}
	}


	void DisplayListCanvas::drawRect(float left, float top, float right, float bottom,
	const SkPaint& paint) {
	addDrawOp(new (alloc()) DrawRectOp(left, top, right, bottom, refPaint(&paint)));
	}

	void DisplayListCanvas::drawRoundRect(float left, float top, float right, float bottom,
	float rx, float ry, const SkPaint& paint) {
	addDrawOp(new (alloc()) DrawRoundRectOp(left, top, right, bottom, rx, ry, refPaint(&paint)));
	}

	void DisplayListCanvas::drawRoundRect(
	CanvasPropertyPrimitive* left, CanvasPropertyPrimitive* top,
	CanvasPropertyPrimitive* right, CanvasPropertyPrimitive* bottom,
	CanvasPropertyPrimitive* rx, CanvasPropertyPrimitive* ry,
	CanvasPropertyPaint* paint) {
	mDisplayListData->ref(left);
	mDisplayListData->ref(top);
	mDisplayListData->ref(right);
	mDisplayListData->ref(bottom);
	mDisplayListData->ref(rx);
	mDisplayListData->ref(ry);
	mDisplayListData->ref(paint);
	refBitmapsInShader(paint->value.getShader());
	addDrawOp(new (alloc()) DrawRoundRectPropsOp(&left->value, &top->value,
	&right->value, &bottom->value, &rx->value, &ry->value, &paint->value));
	}

	void DisplayListCanvas::drawCircle(float x, float y, float radius, const SkPaint& paint) {
	addDrawOp(new (alloc()) DrawCircleOp(x, y, radius, refPaint(&paint)));
	}

	void DisplayListCanvas::drawCircle(CanvasPropertyPrimitive* x, CanvasPropertyPrimitive* y,
	CanvasPropertyPrimitive* radius, CanvasPropertyPaint* paint) {
	mDisplayListData->ref(x);
	mDisplayListData->ref(y);
	mDisplayListData->ref(radius);
	mDisplayListData->ref(paint);
	refBitmapsInShader(paint->value.getShader());
	addDrawOp(new (alloc()) DrawCirclePropsOp(&x->value, &y->value,
	&radius->value, &paint->value));
	}

	void DisplayListCanvas::drawOval(float left, float top, float right, float bottom,
	const SkPaint& paint) {
	addDrawOp(new (alloc()) DrawOvalOp(left, top, right, bottom, refPaint(&paint)));
	}

	void DisplayListCanvas::drawArc(float left, float top, float right, float bottom,
	float startAngle, float sweepAngle, bool useCenter, const SkPaint& paint) {
	if (fabs(sweepAngle) >= 360.0f) {
	drawOval(left, top, right, bottom, paint);
	} else {
	addDrawOp(new (alloc()) DrawArcOp(left, top, right, bottom,
	startAngle, sweepAngle, useCenter, refPaint(&paint)));
	}
	}

	void DisplayListCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
	addDrawOp(new (alloc()) DrawPathOp(refPath(&path), refPaint(&paint)));
	}

	void DisplayListCanvas::drawLines(const float* points, int count, const SkPaint& paint) {
	points = refBuffer<float>(points, count);

	addDrawOp(new (alloc()) DrawLinesOp(points, count, refPaint(&paint)));
	}

	void DisplayListCanvas::drawPoints(const float* points, int count, const SkPaint& paint) {
	points = refBuffer<float>(points, count);

	addDrawOp(new (alloc()) DrawPointsOp(points, count, refPaint(&paint)));
	}

	void DisplayListCanvas::drawTextOnPath(const uint16_t* glyphs, int count,
	const SkPath& path, float hOffset, float vOffset, const SkPaint& paint) {
	if (!glyphs \|\| count <= 0) return;

	int bytesCount = 2 * count;
	DrawOp* op = new (alloc()) DrawTextOnPathOp(refText((const char*) glyphs, bytesCount),
	bytesCount, count, refPath(&path),
	hOffset, vOffset, refPaint(&paint));
	addDrawOp(op);
	}

	void DisplayListCanvas::drawPosText(const uint16_t* text, const float* positions,
	int count, int posCount, const SkPaint& paint) {
	if (!text \|\| count <= 0) return;

	int bytesCount = 2 * count;
	positions = refBuffer<float>(positions, count * 2);

	DrawOp* op = new (alloc()) DrawPosTextOp(refText((const char*) text, bytesCount),
	bytesCount, count, positions, refPaint(&paint));
	addDrawOp(op);
	}

	static void simplifyPaint(int color, SkPaint* paint) {
	paint->setColor(color);
	paint->setShader(nullptr);
	paint->setColorFilter(nullptr);
	paint->setLooper(nullptr);
	paint->setStrokeWidth(4 + 0.04 * paint->getTextSize());
	paint->setStrokeJoin(SkPaint::kRound_Join);
	paint->setLooper(nullptr);
	}

	void DisplayListCanvas::drawText(const uint16_t* glyphs, const float* positions,
	int count, const SkPaint& paint, float x, float y,
	float boundsLeft, float boundsTop, float boundsRight, float boundsBottom,
	float totalAdvance) {

	if (!glyphs \|\| count <= 0 \|\| PaintUtils::paintWillNotDrawText(paint)) return;

	int bytesCount = count * 2;
	const char* text = refText((const char*) glyphs, bytesCount);
	positions = refBuffer<float>(positions, count * 2);
	Rect bounds(boundsLeft, boundsTop, boundsRight, boundsBottom);

	if (CC_UNLIKELY(mHighContrastText)) {
	// high contrast draw path
	int color = paint.getColor();
	int channelSum = SkColorGetR(color) + SkColorGetG(color) + SkColorGetB(color);
	bool darken = channelSum < (128 * 3);

	// outline
	SkPaint* outlinePaint = copyPaint(&paint);
	simplifyPaint(darken ? SK_ColorWHITE : SK_ColorBLACK, outlinePaint);
	outlinePaint->setStyle(SkPaint::kStrokeAndFill_Style);
	addDrawOp(new (alloc()) DrawTextOp(text, bytesCount, count,
	x, y, positions, outlinePaint, totalAdvance, bounds)); // bounds?

	// inner
	SkPaint* innerPaint = copyPaint(&paint);
	simplifyPaint(darken ? SK_ColorBLACK : SK_ColorWHITE, innerPaint);
	innerPaint->setStyle(SkPaint::kFill_Style);
	addDrawOp(new (alloc()) DrawTextOp(text, bytesCount, count,
	x, y, positions, innerPaint, totalAdvance, bounds));
	} else {
	// standard draw path
	DrawOp* op = new (alloc()) DrawTextOp(text, bytesCount, count,
	x, y, positions, refPaint(&paint), totalAdvance, bounds);
	addDrawOp(op);
	}
	}

	void DisplayListCanvas::drawRects(const float* rects, int count, const SkPaint* paint) {
	if (count <= 0) return;

	rects = refBuffer<float>(rects, count);
	paint = refPaint(paint);
	addDrawOp(new (alloc()) DrawRectsOp(rects, count, paint));
	}

	void DisplayListCanvas::setDrawFilter(SkDrawFilter* filter) {
	mDrawFilter.reset(SkSafeRef(filter));
	}

	void DisplayListCanvas::insertReorderBarrier(bool enableReorder) {
	flushRestoreToCount();
	flushTranslate();
	mDeferredBarrierType = enableReorder ? kBarrier_OutOfOrder : kBarrier_InOrder;
	}

	void DisplayListCanvas::flushRestoreToCount() {
	if (mRestoreSaveCount >= 0) {
	addOpAndUpdateChunk(new (alloc()) RestoreToCountOp(mRestoreSaveCount));
	mRestoreSaveCount = -1;
	}
	}

	void DisplayListCanvas::flushTranslate() {
	if (mHasDeferredTranslate) {
	if (mTranslateX != 0.0f \|\| mTranslateY != 0.0f) {
	addOpAndUpdateChunk(new (alloc()) TranslateOp(mTranslateX, mTranslateY));
	mTranslateX = mTranslateY = 0.0f;
	}
	mHasDeferredTranslate = false;
	}
	}

	size_t DisplayListCanvas::addOpAndUpdateChunk(DisplayListOp* op) {
	int insertIndex = mDisplayListData->displayListOps.add(op);
	if (mDeferredBarrierType != kBarrier_None) {
	// op is first in new chunk
	mDisplayListData->chunks.push();
	DisplayListData::Chunk& newChunk = mDisplayListData->chunks.editTop();
	newChunk.beginOpIndex = insertIndex;
	newChunk.endOpIndex = insertIndex + 1;
	newChunk.reorderChildren = (mDeferredBarrierType == kBarrier_OutOfOrder);

	int nextChildIndex = mDisplayListData->children().size();
	newChunk.beginChildIndex = newChunk.endChildIndex = nextChildIndex;
	mDeferredBarrierType = kBarrier_None;
	} else {
	// standard case - append to existing chunk
	mDisplayListData->chunks.editTop().endOpIndex = insertIndex + 1;
	}
	return insertIndex;
	}

	size_t DisplayListCanvas::flushAndAddOp(DisplayListOp* op) {
	flushRestoreToCount();
	flushTranslate();
	return addOpAndUpdateChunk(op);
	}

	size_t DisplayListCanvas::addStateOp(StateOp* op) {
	return flushAndAddOp(op);
	}

	size_t DisplayListCanvas::addDrawOp(DrawOp* op) {
	Rect localBounds;
	if (op->getLocalBounds(localBounds)) {
	bool rejected = quickRejectRect(localBounds.left, localBounds.top,
	localBounds.right, localBounds.bottom);
	op->setQuickRejected(rejected);
	}

	mDisplayListData->hasDrawOps = true;
	return flushAndAddOp(op);
	}

	size_t DisplayListCanvas::addRenderNodeOp(DrawRenderNodeOp* op) {
	int opIndex = addDrawOp(op);
	int childIndex = mDisplayListData->addChild(op);

	// update the chunk's child indices
	DisplayListData::Chunk& chunk = mDisplayListData->chunks.editTop();
	chunk.endChildIndex = childIndex + 1;

	if (op->renderNode()->stagingProperties().isProjectionReceiver()) {
	// use staging property, since recording on UI thread
	mDisplayListData->projectionReceiveIndex = opIndex;
	}
	return opIndex;
	}

	void DisplayListCanvas::refBitmapsInShader(const SkShader* shader) {
	if (!shader) return;

	// If this paint has an SkShader that has an SkBitmap add
	// it to the bitmap pile
	SkBitmap bitmap;
	SkShader::TileMode xy[2];
	if (shader->asABitmap(&bitmap, nullptr, xy) == SkShader::kDefault_BitmapType) {
	refBitmap(bitmap);
	return;
	}
	SkShader::ComposeRec rec;
	if (shader->asACompose(&rec)) {
	refBitmapsInShader(rec.fShaderA);
	refBitmapsInShader(rec.fShaderB);
	return;
	}
	}

	}; // namespace uirenderer
	}; // namespace android