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

 /*
  * Copyright (C) 2015 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 "SkiaCanvasProxy.h"

 #include <memory>

 #include <log/log.h>

 #include "hwui/Bitmap.h"
 #include <SkLatticeIter.h>
 #include <SkPatchUtils.h>
 #include <SkPaint.h>
 #include <SkPath.h>
 #include <SkPixelRef.h>
 #include <SkRect.h>
 #include <SkRRect.h>
 #include <SkRSXform.h>
 #include <SkSurface.h>
 #include <SkTextBlobRunIterator.h>
 #include <SkVertices.h>

 namespace android {
 namespace uirenderer {

 SkiaCanvasProxy::SkiaCanvasProxy(Canvas* canvas, bool filterHwuiCalls)
         : INHERITED(canvas->width(), canvas->height())
         , mCanvas(canvas)
         , mFilterHwuiCalls(filterHwuiCalls) {}

 void SkiaCanvasProxy::onDrawPaint(const SkPaint& paint) {
     mCanvas->drawPaint(paint);
 }

 void SkiaCanvasProxy::onDrawPoints(PointMode pointMode, size_t count, const SkPoint pts[],
         const SkPaint& paint) {
     if (!pts || count == 0) {
         return;
     }

     // convert the SkPoints into floats
     static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
     const size_t floatCount = count << 1;
     const float* floatArray = &pts[0].fX;

     switch (pointMode) {
         case kPoints_PointMode: {
             mCanvas->drawPoints(floatArray, floatCount, paint);
             break;
         }
         case kLines_PointMode: {
             mCanvas->drawLines(floatArray, floatCount, paint);
             break;
         }
         case kPolygon_PointMode: {
             SkPaint strokedPaint(paint);
             strokedPaint.setStyle(SkPaint::kStroke_Style);

             SkPath path;
             for (size_t i = 0; i < count - 1; i++) {
                 path.moveTo(pts[i]);
                 path.lineTo(pts[i+1]);
                 this->drawPath(path, strokedPaint);
                 path.rewind();
             }
             break;
         }
         default:
             LOG_ALWAYS_FATAL("Unknown point type");
     }
 }

 void SkiaCanvasProxy::onDrawOval(const SkRect& rect, const SkPaint& paint) {
     mCanvas->drawOval(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint);
 }

 void SkiaCanvasProxy::onDrawRect(const SkRect& rect, const SkPaint& paint) {
     mCanvas->drawRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint);
 }

 void SkiaCanvasProxy::onDrawRRect(const SkRRect& roundRect, const SkPaint& paint) {
     if (!roundRect.isComplex()) {
         const SkRect& rect = roundRect.rect();
         SkVector radii = roundRect.getSimpleRadii();
         mCanvas->drawRoundRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom,
                                radii.fX, radii.fY, paint);
     } else {
         SkPath path;
         path.addRRect(roundRect);
         mCanvas->drawPath(path, paint);
     }
 }

 void SkiaCanvasProxy::onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle,
                                 bool useCenter, const SkPaint& paint) {
     mCanvas->drawArc(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom,
                      startAngle, sweepAngle, useCenter, paint);
 }

 void SkiaCanvasProxy::onDrawPath(const SkPath& path, const SkPaint& paint) {
     mCanvas->drawPath(path, paint);
 }

 void SkiaCanvasProxy::onDrawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
         const SkPaint* paint) {
     sk_sp<Bitmap> hwuiBitmap = Bitmap::createFrom(bitmap.info(), *bitmap.pixelRef());
     // HWUI doesn't support extractSubset(), so convert any subsetted bitmap into
     // a drawBitmapRect(); pass through an un-subsetted bitmap.
     if (hwuiBitmap && bitmap.dimensions() != hwuiBitmap->info().dimensions()) {
         SkIPoint origin = bitmap.pixelRefOrigin();
         mCanvas->drawBitmap(*hwuiBitmap, origin.fX, origin.fY,
                             origin.fX + bitmap.dimensions().width(),
                             origin.fY + bitmap.dimensions().height(),
                             left, top,
                             left + bitmap.dimensions().width(),
                             top + bitmap.dimensions().height(),
                             paint);
     } else {
         mCanvas->drawBitmap(*hwuiBitmap, left, top, paint);
     }
 }

 void SkiaCanvasProxy::onDrawBitmapRect(const SkBitmap& skBitmap, const SkRect* srcPtr,
         const SkRect& dst, const SkPaint* paint, SrcRectConstraint) {
     SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(skBitmap.width(), skBitmap.height());
     // TODO: if bitmap is a subset, do we need to add pixelRefOrigin to src?
    Bitmap* bitmap = reinterpret_cast<Bitmap*>(skBitmap.pixelRef());
    mCanvas->drawBitmap(*bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
                         dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
 }

 void SkiaCanvasProxy::onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
         const SkRect& dst, const SkPaint*) {
     //TODO make nine-patch drawing a method on Canvas.h
     SkDEBUGFAIL("SkiaCanvasProxy::onDrawBitmapNine is not yet supported");
 }

 void SkiaCanvasProxy::onDrawImage(const SkImage* image, SkScalar left, SkScalar top,
         const SkPaint* paint) {
     SkBitmap skiaBitmap;
     SkPixmap pixmap;
     if (image->peekPixels(&pixmap) && skiaBitmap.installPixels(pixmap)) {
         onDrawBitmap(skiaBitmap, left, top, paint);
     }
 }

 void SkiaCanvasProxy::onDrawImageRect(const SkImage* image, const SkRect* srcPtr, const SkRect& dst,
         const SkPaint* paint, SrcRectConstraint constraint) {
     SkBitmap skiaBitmap;
     SkPixmap pixmap;
     if (image->peekPixels(&pixmap) && skiaBitmap.installPixels(pixmap)) {
         sk_sp<Bitmap> bitmap = Bitmap::createFrom(skiaBitmap.info(), *skiaBitmap.pixelRef());
         SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(image->width(), image->height());
         mCanvas->drawBitmap(*bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
                 dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
     }
 }

 void SkiaCanvasProxy::onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
         const SkPaint*) {
     SkDEBUGFAIL("SkiaCanvasProxy::onDrawImageNine is not yet supported");
 }

 void SkiaCanvasProxy::onDrawImageLattice(const SkImage* image, const Lattice& lattice,
         const SkRect& dst, const SkPaint* paint) {
     SkLatticeIter iter(lattice, dst);
     SkRect srcR, dstR;
     while (iter.next(&srcR, &dstR)) {
         onDrawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
     }
 }

 void SkiaCanvasProxy::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode bmode,
         const SkPaint& paint) {
     if (mFilterHwuiCalls) {
         return;
     }
     mCanvas->drawVertices(vertices, bmode, paint);
 }

 sk_sp<SkSurface> SkiaCanvasProxy::onNewSurface(const SkImageInfo&, const SkSurfaceProps&) {
     SkDEBUGFAIL("SkiaCanvasProxy::onNewSurface is not supported");
     return NULL;
 }

 void SkiaCanvasProxy::willSave() {
     mCanvas->save(android::SaveFlags::MatrixClip);
 }

 static inline SaveFlags::Flags saveFlags(SkCanvas::SaveLayerFlags layerFlags) {
     SaveFlags::Flags saveFlags = 0;

     if (!(layerFlags & SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag)) {
         saveFlags |= SaveFlags::ClipToLayer;
     }

     if (!(layerFlags & SkCanvas::kIsOpaque_SaveLayerFlag)) {
         saveFlags |= SaveFlags::HasAlphaLayer;
     }

     return saveFlags;
 }

 SkCanvas::SaveLayerStrategy SkiaCanvasProxy::getSaveLayerStrategy(const SaveLayerRec& saveLayerRec) {
     SkRect rect;
     if (saveLayerRec.fBounds) {
         rect = *saveLayerRec.fBounds;
     } else if (!mCanvas->getClipBounds(&rect)) {
         rect = SkRect::MakeEmpty();
     }
     mCanvas->saveLayer(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, saveLayerRec.fPaint,
                        saveFlags(saveLayerRec.fSaveLayerFlags));
     return SkCanvas::kNoLayer_SaveLayerStrategy;
 }

 void SkiaCanvasProxy::willRestore() {
     mCanvas->restore();
 }

 void SkiaCanvasProxy::didConcat(const SkMatrix& matrix) {
     mCanvas->concat(matrix);
 }

 void SkiaCanvasProxy::didSetMatrix(const SkMatrix& matrix) {
     mCanvas->setMatrix(matrix);
 }

 void SkiaCanvasProxy::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
         const SkPaint& paint) {
     SkPath path;
     path.addRRect(outer);
     path.addRRect(inner);
     path.setFillType(SkPath::kEvenOdd_FillType);
     this->drawPath(path, paint);
 }

 /**
  * Utility class that converts the incoming text & paint from the given encoding
  * into glyphIDs.
  */
 class GlyphIDConverter {
 public:
     GlyphIDConverter(const void* text, size_t byteLength, const SkPaint& origPaint) {
         paint = origPaint;
         if (paint.getTextEncoding() == SkPaint::kGlyphID_TextEncoding) {
             glyphIDs = (uint16_t*)text;
             count = byteLength >> 1;
         } else {
              // ensure space for one glyph per ID given UTF8 encoding.
             storage.reset(new uint16_t[byteLength]);
             glyphIDs = storage.get();
             count = paint.textToGlyphs(text, byteLength, storage.get());
             paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
         }
     }

     SkPaint paint;
     uint16_t* glyphIDs;
     int count;
 private:
     std::unique_ptr<uint16_t[]> storage;
 };

 void SkiaCanvasProxy::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
         const SkPaint& origPaint) {
     // convert to glyphIDs if necessary
     GlyphIDConverter glyphs(text, byteLength, origPaint);

     // compute the glyph positions
     std::unique_ptr<SkScalar[]> glyphWidths(new SkScalar[glyphs.count]);
     glyphs.paint.getTextWidths(glyphs.glyphIDs, glyphs.count << 1, glyphWidths.get());

     // compute conservative bounds
     // NOTE: We could call the faster paint.getFontBounds for a less accurate,
     //       but even more conservative bounds if this  is too slow.
     SkRect bounds;
     glyphs.paint.measureText(glyphs.glyphIDs, glyphs.count << 1, &bounds);

     // adjust for non-left alignment
     if (glyphs.paint.getTextAlign() != SkPaint::kLeft_Align) {
         SkScalar stop = 0;
         for (int i = 0; i < glyphs.count; i++) {
             stop += glyphWidths[i];
         }
         if (glyphs.paint.getTextAlign() == SkPaint::kCenter_Align) {
             stop = SkScalarHalf(stop);
         }
         if (glyphs.paint.isVerticalText()) {
             y -= stop;
         } else {
             x -= stop;
         }
     }

     // setup the first glyph position and adjust bounds if needed
     int xBaseline = 0;
     int yBaseline = 0;
     if (mCanvas->drawTextAbsolutePos()) {
         bounds.offset(x,y);
         xBaseline = x;
         yBaseline = y;
     }

     static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
     auto glyphFunc = [&] (uint16_t* text, float* positions) {
         memcpy(text, glyphs.glyphIDs, glyphs.count*sizeof(uint16_t));
         size_t posIndex = 0;
         // setup the first glyph position
         positions[posIndex++] = xBaseline;
         positions[posIndex++] = yBaseline;
         // setup the remaining glyph positions
         if (glyphs.paint.isVerticalText()) {
             float yPosition = yBaseline;
             for (int i = 1; i < glyphs.count; i++) {
                 positions[posIndex++] = xBaseline;
                 yPosition += glyphWidths[i-1];
                 positions[posIndex++] = yPosition;
             }
         } else {
             float xPosition = xBaseline;
             for (int i = 1; i < glyphs.count; i++) {
                 xPosition += glyphWidths[i-1];
                 positions[posIndex++] = xPosition;
                 positions[posIndex++] = yBaseline;
             }
         }
     };
     mCanvas->drawGlyphs(glyphFunc, glyphs.count, glyphs.paint, x, y, bounds.fLeft, bounds.fTop,
             bounds.fRight, bounds.fBottom, 0);
 }

 void SkiaCanvasProxy::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
         const SkPaint& origPaint) {
     // convert to glyphIDs if necessary
     GlyphIDConverter glyphs(text, byteLength, origPaint);

     // convert to relative positions if necessary
     int x, y;
     if (mCanvas->drawTextAbsolutePos()) {
         x = 0;
         y = 0;
     } else {
         x = pos[0].fX;
         y = pos[0].fY;
     }

     // Compute conservative bounds.  If the content has already been processed
     // by Minikin then it had already computed these bounds.  Unfortunately,
     // there is no way to capture those bounds as part of the Skia drawPosText
     // API so we need to do that computation again here.
     SkRect bounds = SkRect::MakeEmpty();
     for (int i = 0; i < glyphs.count; i++) {
         SkRect glyphBounds = SkRect::MakeEmpty();
         glyphs.paint.measureText(&glyphs.glyphIDs[i], sizeof(uint16_t), &glyphBounds);
         glyphBounds.offset(pos[i].fX, pos[i].fY);
         bounds.join(glyphBounds);
     }

     static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
     auto glyphFunc = [&] (uint16_t* text, float* positions) {
         memcpy(text, glyphs.glyphIDs, glyphs.count*sizeof(uint16_t));
         if (mCanvas->drawTextAbsolutePos()) {
             memcpy(positions, pos, 2*glyphs.count*sizeof(float));
         } else {
             for (int i = 0, posIndex = 0; i < glyphs.count; i++) {
                 positions[posIndex++] = pos[i].fX - x;
                 positions[posIndex++] = pos[i].fY - y;
             }
         }
     };
     mCanvas->drawGlyphs(glyphFunc, glyphs.count, glyphs.paint, x, y, bounds.fLeft, bounds.fTop,
             bounds.fRight, bounds.fBottom, 0);
 }

 void SkiaCanvasProxy::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
         SkScalar constY, const SkPaint& paint) {
     const size_t pointCount = byteLength >> 1;
     std::unique_ptr<SkPoint[]> pts(new SkPoint[pointCount]);
     for (size_t i = 0; i < pointCount; i++) {
         pts[i].set(xpos[i], constY);
     }
     this->onDrawPosText(text, byteLength, pts.get(), paint);
 }

 void SkiaCanvasProxy::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
         const SkMatrix* matrix, const SkPaint& origPaint) {
     SkDEBUGFAIL("SkiaCanvasProxy::onDrawTextOnPath is not supported");
 }

 void SkiaCanvasProxy::onDrawTextRSXform(const void* text, size_t byteLength,
         const SkRSXform xform[], const SkRect* cullRect, const SkPaint& paint) {
     GlyphIDConverter glyphs(text, byteLength, paint); // Just get count
     SkMatrix localM, currM, origM;
     mCanvas->getMatrix(&currM);
     origM = currM;
     for (int i = 0; i < glyphs.count; i++) {
         localM.setRSXform(*xform++);
         currM.setConcat(origM, localM);
         mCanvas->setMatrix(currM);
         this->onDrawText((char*)text + (byteLength / glyphs.count * i),
                          byteLength / glyphs.count, 0, 0, paint);
     }
     mCanvas->setMatrix(origM);
 }


 void SkiaCanvasProxy::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
         const SkPaint& paint) {
     SkPaint runPaint = paint;

      SkTextBlobRunIterator it(blob);
      for (;!it.done(); it.next()) {
          size_t textLen = it.glyphCount() * sizeof(uint16_t);
          const SkPoint& offset = it.offset();
          // applyFontToPaint() always overwrites the exact same attributes,
          // so it is safe to not re-seed the paint for this reason.
          it.applyFontToPaint(&runPaint);

          switch (it.positioning()) {
          case SkTextBlob::kDefault_Positioning:
              this->drawText(it.glyphs(), textLen, x + offset.x(), y + offset.y(), runPaint);
              break;
          case SkTextBlob::kHorizontal_Positioning: {
              std::unique_ptr<SkPoint[]> pts(new SkPoint[it.glyphCount()]);
              for (size_t i = 0; i < it.glyphCount(); i++) {
                  pts[i].set(x + offset.x() + it.pos()[i], y + offset.y());
              }
              this->drawPosText(it.glyphs(), textLen, pts.get(), runPaint);
              break;
          }
          case SkTextBlob::kFull_Positioning: {
              std::unique_ptr<SkPoint[]> pts(new SkPoint[it.glyphCount()]);
              for (size_t i = 0; i < it.glyphCount(); i++) {
                  const size_t xIndex = i*2;
                  const size_t yIndex = xIndex + 1;
                  pts[i].set(x + offset.x() + it.pos()[xIndex], y + offset.y() + it.pos()[yIndex]);
              }
              this->drawPosText(it.glyphs(), textLen, pts.get(), runPaint);
              break;
          }
          default:
              SkFAIL("unhandled positioning mode");
          }
      }
 }

 void SkiaCanvasProxy::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
         const SkPoint texCoords[4], SkBlendMode bmode, const SkPaint& paint) {
     if (mFilterHwuiCalls) {
         return;
     }
     SkMatrix matrix;
     mCanvas->getMatrix(&matrix);
     SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &matrix);

     mCanvas->drawVertices(SkPatchUtils::MakeVertices(cubics, colors, texCoords,
                                                      lod.width(), lod.height()).get(),
                           bmode, paint);
 }

 void SkiaCanvasProxy::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle) {
     mCanvas->clipRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, op);
 }

 void SkiaCanvasProxy::onClipRRect(const SkRRect& roundRect, SkClipOp op, ClipEdgeStyle) {
     SkPath path;
     path.addRRect(roundRect);
     mCanvas->clipPath(&path, op);
 }

 void SkiaCanvasProxy::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle) {
     mCanvas->clipPath(&path, op);
 }

 }; // namespace uirenderer
 }; // namespace android
	/*
	* Copyright (C) 2015 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 "SkiaCanvasProxy.h"

	#include <memory>

	#include <log/log.h>

	#include "hwui/Bitmap.h"
	#include <SkLatticeIter.h>
	#include <SkPatchUtils.h>
	#include <SkPaint.h>
	#include <SkPath.h>
	#include <SkPixelRef.h>
	#include <SkRect.h>
	#include <SkRRect.h>
	#include <SkRSXform.h>
	#include <SkSurface.h>
	#include <SkTextBlobRunIterator.h>
	#include <SkVertices.h>

	namespace android {
	namespace uirenderer {

	SkiaCanvasProxy::SkiaCanvasProxy(Canvas* canvas, bool filterHwuiCalls)
	: INHERITED(canvas->width(), canvas->height())
	, mCanvas(canvas)
	, mFilterHwuiCalls(filterHwuiCalls) {}

	void SkiaCanvasProxy::onDrawPaint(const SkPaint& paint) {
	mCanvas->drawPaint(paint);
	}

	void SkiaCanvasProxy::onDrawPoints(PointMode pointMode, size_t count, const SkPoint pts[],
	const SkPaint& paint) {
	if (!pts \|\| count == 0) {
	return;
	}

	// convert the SkPoints into floats
	static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
	const size_t floatCount = count << 1;
	const float* floatArray = &pts[0].fX;

	switch (pointMode) {
	case kPoints_PointMode: {
	mCanvas->drawPoints(floatArray, floatCount, paint);
	break;
	}
	case kLines_PointMode: {
	mCanvas->drawLines(floatArray, floatCount, paint);
	break;
	}
	case kPolygon_PointMode: {
	SkPaint strokedPaint(paint);
	strokedPaint.setStyle(SkPaint::kStroke_Style);

	SkPath path;
	for (size_t i = 0; i < count - 1; i++) {
	path.moveTo(pts[i]);
	path.lineTo(pts[i+1]);
	this->drawPath(path, strokedPaint);
	path.rewind();
	}
	break;
	}
	default:
	LOG_ALWAYS_FATAL("Unknown point type");
	}
	}

	void SkiaCanvasProxy::onDrawOval(const SkRect& rect, const SkPaint& paint) {
	mCanvas->drawOval(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint);
	}

	void SkiaCanvasProxy::onDrawRect(const SkRect& rect, const SkPaint& paint) {
	mCanvas->drawRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, paint);
	}

	void SkiaCanvasProxy::onDrawRRect(const SkRRect& roundRect, const SkPaint& paint) {
	if (!roundRect.isComplex()) {
	const SkRect& rect = roundRect.rect();
	SkVector radii = roundRect.getSimpleRadii();
	mCanvas->drawRoundRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom,
	radii.fX, radii.fY, paint);
	} else {
	SkPath path;
	path.addRRect(roundRect);
	mCanvas->drawPath(path, paint);
	}
	}

	void SkiaCanvasProxy::onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle,
	bool useCenter, const SkPaint& paint) {
	mCanvas->drawArc(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom,
	startAngle, sweepAngle, useCenter, paint);
	}

	void SkiaCanvasProxy::onDrawPath(const SkPath& path, const SkPaint& paint) {
	mCanvas->drawPath(path, paint);
	}

	void SkiaCanvasProxy::onDrawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
	const SkPaint* paint) {
	sk_sp<Bitmap> hwuiBitmap = Bitmap::createFrom(bitmap.info(), *bitmap.pixelRef());
	// HWUI doesn't support extractSubset(), so convert any subsetted bitmap into
	// a drawBitmapRect(); pass through an un-subsetted bitmap.
	if (hwuiBitmap && bitmap.dimensions() != hwuiBitmap->info().dimensions()) {
	SkIPoint origin = bitmap.pixelRefOrigin();
	mCanvas->drawBitmap(*hwuiBitmap, origin.fX, origin.fY,
	origin.fX + bitmap.dimensions().width(),
	origin.fY + bitmap.dimensions().height(),
	left, top,
	left + bitmap.dimensions().width(),
	top + bitmap.dimensions().height(),
	paint);
	} else {
	mCanvas->drawBitmap(*hwuiBitmap, left, top, paint);
	}
	}

	void SkiaCanvasProxy::onDrawBitmapRect(const SkBitmap& skBitmap, const SkRect* srcPtr,
	const SkRect& dst, const SkPaint* paint, SrcRectConstraint) {
	SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(skBitmap.width(), skBitmap.height());
	// TODO: if bitmap is a subset, do we need to add pixelRefOrigin to src?
	Bitmap* bitmap = reinterpret_cast<Bitmap*>(skBitmap.pixelRef());
	mCanvas->drawBitmap(*bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
	dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
	}

	void SkiaCanvasProxy::onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
	const SkRect& dst, const SkPaint*) {
	//TODO make nine-patch drawing a method on Canvas.h
	SkDEBUGFAIL("SkiaCanvasProxy::onDrawBitmapNine is not yet supported");
	}

	void SkiaCanvasProxy::onDrawImage(const SkImage* image, SkScalar left, SkScalar top,
	const SkPaint* paint) {
	SkBitmap skiaBitmap;
	SkPixmap pixmap;
	if (image->peekPixels(&pixmap) && skiaBitmap.installPixels(pixmap)) {
	onDrawBitmap(skiaBitmap, left, top, paint);
	}
	}

	void SkiaCanvasProxy::onDrawImageRect(const SkImage* image, const SkRect* srcPtr, const SkRect& dst,
	const SkPaint* paint, SrcRectConstraint constraint) {
	SkBitmap skiaBitmap;
	SkPixmap pixmap;
	if (image->peekPixels(&pixmap) && skiaBitmap.installPixels(pixmap)) {
	sk_sp<Bitmap> bitmap = Bitmap::createFrom(skiaBitmap.info(), *skiaBitmap.pixelRef());
	SkRect src = (srcPtr) ? *srcPtr : SkRect::MakeWH(image->width(), image->height());
	mCanvas->drawBitmap(*bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom,
	dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint);
	}
	}

	void SkiaCanvasProxy::onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
	const SkPaint*) {
	SkDEBUGFAIL("SkiaCanvasProxy::onDrawImageNine is not yet supported");
	}

	void SkiaCanvasProxy::onDrawImageLattice(const SkImage* image, const Lattice& lattice,
	const SkRect& dst, const SkPaint* paint) {
	SkLatticeIter iter(lattice, dst);
	SkRect srcR, dstR;
	while (iter.next(&srcR, &dstR)) {
	onDrawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
	}
	}

	void SkiaCanvasProxy::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode bmode,
	const SkPaint& paint) {
	if (mFilterHwuiCalls) {
	return;
	}
	mCanvas->drawVertices(vertices, bmode, paint);
	}

	sk_sp<SkSurface> SkiaCanvasProxy::onNewSurface(const SkImageInfo&, const SkSurfaceProps&) {
	SkDEBUGFAIL("SkiaCanvasProxy::onNewSurface is not supported");
	return NULL;
	}

	void SkiaCanvasProxy::willSave() {
	mCanvas->save(android::SaveFlags::MatrixClip);
	}

	static inline SaveFlags::Flags saveFlags(SkCanvas::SaveLayerFlags layerFlags) {
	SaveFlags::Flags saveFlags = 0;

	if (!(layerFlags & SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag)) {
	saveFlags \|= SaveFlags::ClipToLayer;
	}

	if (!(layerFlags & SkCanvas::kIsOpaque_SaveLayerFlag)) {
	saveFlags \|= SaveFlags::HasAlphaLayer;
	}

	return saveFlags;
	}

	SkCanvas::SaveLayerStrategy SkiaCanvasProxy::getSaveLayerStrategy(const SaveLayerRec& saveLayerRec) {
	SkRect rect;
	if (saveLayerRec.fBounds) {
	rect = *saveLayerRec.fBounds;
	} else if (!mCanvas->getClipBounds(&rect)) {
	rect = SkRect::MakeEmpty();
	}
	mCanvas->saveLayer(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, saveLayerRec.fPaint,
	saveFlags(saveLayerRec.fSaveLayerFlags));
	return SkCanvas::kNoLayer_SaveLayerStrategy;
	}

	void SkiaCanvasProxy::willRestore() {
	mCanvas->restore();
	}

	void SkiaCanvasProxy::didConcat(const SkMatrix& matrix) {
	mCanvas->concat(matrix);
	}

	void SkiaCanvasProxy::didSetMatrix(const SkMatrix& matrix) {
	mCanvas->setMatrix(matrix);
	}

	void SkiaCanvasProxy::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
	const SkPaint& paint) {
	SkPath path;
	path.addRRect(outer);
	path.addRRect(inner);
	path.setFillType(SkPath::kEvenOdd_FillType);
	this->drawPath(path, paint);
	}

	/**
	* Utility class that converts the incoming text & paint from the given encoding
	* into glyphIDs.
	*/
	class GlyphIDConverter {
	public:
	GlyphIDConverter(const void* text, size_t byteLength, const SkPaint& origPaint) {
	paint = origPaint;
	if (paint.getTextEncoding() == SkPaint::kGlyphID_TextEncoding) {
	glyphIDs = (uint16_t*)text;
	count = byteLength >> 1;
	} else {
	// ensure space for one glyph per ID given UTF8 encoding.
	storage.reset(new uint16_t[byteLength]);
	glyphIDs = storage.get();
	count = paint.textToGlyphs(text, byteLength, storage.get());
	paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
	}
	}

	SkPaint paint;
	uint16_t* glyphIDs;
	int count;
	private:
	std::unique_ptr<uint16_t[]> storage;
	};

	void SkiaCanvasProxy::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
	const SkPaint& origPaint) {
	// convert to glyphIDs if necessary
	GlyphIDConverter glyphs(text, byteLength, origPaint);

	// compute the glyph positions
	std::unique_ptr<SkScalar[]> glyphWidths(new SkScalar[glyphs.count]);
	glyphs.paint.getTextWidths(glyphs.glyphIDs, glyphs.count << 1, glyphWidths.get());

	// compute conservative bounds
	// NOTE: We could call the faster paint.getFontBounds for a less accurate,
	// but even more conservative bounds if this is too slow.
	SkRect bounds;
	glyphs.paint.measureText(glyphs.glyphIDs, glyphs.count << 1, &bounds);

	// adjust for non-left alignment
	if (glyphs.paint.getTextAlign() != SkPaint::kLeft_Align) {
	SkScalar stop = 0;
	for (int i = 0; i < glyphs.count; i++) {
	stop += glyphWidths[i];
	}
	if (glyphs.paint.getTextAlign() == SkPaint::kCenter_Align) {
	stop = SkScalarHalf(stop);
	}
	if (glyphs.paint.isVerticalText()) {
	y -= stop;
	} else {
	x -= stop;
	}
	}

	// setup the first glyph position and adjust bounds if needed
	int xBaseline = 0;
	int yBaseline = 0;
	if (mCanvas->drawTextAbsolutePos()) {
	bounds.offset(x,y);
	xBaseline = x;
	yBaseline = y;
	}

	static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
	auto glyphFunc = [&] (uint16_t* text, float* positions) {
	memcpy(text, glyphs.glyphIDs, glyphs.count*sizeof(uint16_t));
	size_t posIndex = 0;
	// setup the first glyph position
	positions[posIndex++] = xBaseline;
	positions[posIndex++] = yBaseline;
	// setup the remaining glyph positions
	if (glyphs.paint.isVerticalText()) {
	float yPosition = yBaseline;
	for (int i = 1; i < glyphs.count; i++) {
	positions[posIndex++] = xBaseline;
	yPosition += glyphWidths[i-1];
	positions[posIndex++] = yPosition;
	}
	} else {
	float xPosition = xBaseline;
	for (int i = 1; i < glyphs.count; i++) {
	xPosition += glyphWidths[i-1];
	positions[posIndex++] = xPosition;
	positions[posIndex++] = yBaseline;
	}
	}
	};
	mCanvas->drawGlyphs(glyphFunc, glyphs.count, glyphs.paint, x, y, bounds.fLeft, bounds.fTop,
	bounds.fRight, bounds.fBottom, 0);
	}

	void SkiaCanvasProxy::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
	const SkPaint& origPaint) {
	// convert to glyphIDs if necessary
	GlyphIDConverter glyphs(text, byteLength, origPaint);

	// convert to relative positions if necessary
	int x, y;
	if (mCanvas->drawTextAbsolutePos()) {
	x = 0;
	y = 0;
	} else {
	x = pos[0].fX;
	y = pos[0].fY;
	}

	// Compute conservative bounds. If the content has already been processed
	// by Minikin then it had already computed these bounds. Unfortunately,
	// there is no way to capture those bounds as part of the Skia drawPosText
	// API so we need to do that computation again here.
	SkRect bounds = SkRect::MakeEmpty();
	for (int i = 0; i < glyphs.count; i++) {
	SkRect glyphBounds = SkRect::MakeEmpty();
	glyphs.paint.measureText(&glyphs.glyphIDs[i], sizeof(uint16_t), &glyphBounds);
	glyphBounds.offset(pos[i].fX, pos[i].fY);
	bounds.join(glyphBounds);
	}

	static_assert(sizeof(SkPoint) == sizeof(float)*2, "SkPoint is no longer two floats");
	auto glyphFunc = [&] (uint16_t* text, float* positions) {
	memcpy(text, glyphs.glyphIDs, glyphs.count*sizeof(uint16_t));
	if (mCanvas->drawTextAbsolutePos()) {
	memcpy(positions, pos, 2glyphs.countsizeof(float));
	} else {
	for (int i = 0, posIndex = 0; i < glyphs.count; i++) {
	positions[posIndex++] = pos[i].fX - x;
	positions[posIndex++] = pos[i].fY - y;
	}
	}
	};
	mCanvas->drawGlyphs(glyphFunc, glyphs.count, glyphs.paint, x, y, bounds.fLeft, bounds.fTop,
	bounds.fRight, bounds.fBottom, 0);
	}

	void SkiaCanvasProxy::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
	SkScalar constY, const SkPaint& paint) {
	const size_t pointCount = byteLength >> 1;
	std::unique_ptr<SkPoint[]> pts(new SkPoint[pointCount]);
	for (size_t i = 0; i < pointCount; i++) {
	pts[i].set(xpos[i], constY);
	}
	this->onDrawPosText(text, byteLength, pts.get(), paint);
	}

	void SkiaCanvasProxy::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
	const SkMatrix* matrix, const SkPaint& origPaint) {
	SkDEBUGFAIL("SkiaCanvasProxy::onDrawTextOnPath is not supported");
	}

	void SkiaCanvasProxy::onDrawTextRSXform(const void* text, size_t byteLength,
	const SkRSXform xform[], const SkRect* cullRect, const SkPaint& paint) {
	GlyphIDConverter glyphs(text, byteLength, paint); // Just get count
	SkMatrix localM, currM, origM;
	mCanvas->getMatrix(&currM);
	origM = currM;
	for (int i = 0; i < glyphs.count; i++) {
	localM.setRSXform(*xform++);
	currM.setConcat(origM, localM);
	mCanvas->setMatrix(currM);
	this->onDrawText((char)text + (byteLength / glyphs.count i),
	byteLength / glyphs.count, 0, 0, paint);
	}
	mCanvas->setMatrix(origM);
	}


	void SkiaCanvasProxy::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
	const SkPaint& paint) {
	SkPaint runPaint = paint;

	SkTextBlobRunIterator it(blob);
	for (;!it.done(); it.next()) {
	size_t textLen = it.glyphCount() * sizeof(uint16_t);
	const SkPoint& offset = it.offset();
	// applyFontToPaint() always overwrites the exact same attributes,
	// so it is safe to not re-seed the paint for this reason.
	it.applyFontToPaint(&runPaint);

	switch (it.positioning()) {
	case SkTextBlob::kDefault_Positioning:
	this->drawText(it.glyphs(), textLen, x + offset.x(), y + offset.y(), runPaint);
	break;
	case SkTextBlob::kHorizontal_Positioning: {
	std::unique_ptr<SkPoint[]> pts(new SkPoint[it.glyphCount()]);
	for (size_t i = 0; i < it.glyphCount(); i++) {
	pts[i].set(x + offset.x() + it.pos()[i], y + offset.y());
	}
	this->drawPosText(it.glyphs(), textLen, pts.get(), runPaint);
	break;
	}
	case SkTextBlob::kFull_Positioning: {
	std::unique_ptr<SkPoint[]> pts(new SkPoint[it.glyphCount()]);
	for (size_t i = 0; i < it.glyphCount(); i++) {
	const size_t xIndex = i*2;
	const size_t yIndex = xIndex + 1;
	pts[i].set(x + offset.x() + it.pos()[xIndex], y + offset.y() + it.pos()[yIndex]);
	}
	this->drawPosText(it.glyphs(), textLen, pts.get(), runPaint);
	break;
	}
	default:
	SkFAIL("unhandled positioning mode");
	}
	}
	}

	void SkiaCanvasProxy::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
	const SkPoint texCoords[4], SkBlendMode bmode, const SkPaint& paint) {
	if (mFilterHwuiCalls) {
	return;
	}
	SkMatrix matrix;
	mCanvas->getMatrix(&matrix);
	SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &matrix);

	mCanvas->drawVertices(SkPatchUtils::MakeVertices(cubics, colors, texCoords,
	lod.width(), lod.height()).get(),
	bmode, paint);
	}

	void SkiaCanvasProxy::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle) {
	mCanvas->clipRect(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, op);
	}

	void SkiaCanvasProxy::onClipRRect(const SkRRect& roundRect, SkClipOp op, ClipEdgeStyle) {
	SkPath path;
	path.addRRect(roundRect);
	mCanvas->clipPath(&path, op);
	}

	void SkiaCanvasProxy::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle) {
	mCanvas->clipPath(&path, op);
	}

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