Improved heuristic for disable acceleration.

third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BaseRenderingContext2D_h
 #define BaseRenderingContext2D_h
 
 #include "bindings/modules/v8/HTMLImageElementOrHTMLVideoElementOrHTMLCanvasElementOrImageBitmap.h"
 #include "bindings/modules/v8/StringOrCanvasGradientOrCanvasPattern.h"
 #include "core/html/ImageData.h"
@@ skipping 147 matching lines @@
 
     virtual bool isContextLost() const = 0;
 
     void restoreMatrixClipStack(SkCanvas*) const;
 
     DECLARE_VIRTUAL_TRACE();
 
     enum DrawCallType {
         StrokePath = 0,
         FillPath,
-        DrawImage,
+        DrawSVGImage,

[Justin Novosad, 2016/08/04 15:53:17]

SVG -> Vector

[sebastienlc, 2016/08/04 16:36:27]

Done.

+        DrawPNGImage,

[Justin Novosad, 2016/08/04 15:53:17]

PNG -> Bitmap

[sebastienlc, 2016/08/04 16:36:27]

Done.

         FillText,
         StrokeText,
         FillRect,
         StrokeRect,
         DrawCallTypeCount // used to specify the size of storage arrays
     };
 
     enum PathFillType {
         ColorFillType,
         LinearGradientFillType,
         RadialGradientFillType,
         PatternFillType,
         PathFillTypeCount // used to specify the size of storage arrays
     };
 
     struct UsageCounters {
         int numDrawCalls[DrawCallTypeCount]; // use DrawCallType enum as index
         double boundingBoxPerimeterDrawCalls[DrawCallTypeCount];
         double boundingBoxAreaDrawCalls[DrawCallTypeCount];
         double boundingBoxAreaFillType[PathFillTypeCount];
         int numNonConvexFillPathCalls;
-        int numGradients;
+        double nonConvexFillPathArea;

[Justin Novosad, 2016/08/04 15:53:17]

Could you change all these doubles to float.  The additional precision is not
justified, aspecially since the areas are computed from FloatRect, and most of
the canvas API uses float. We'll get rid all the casts to double.

[sebastienlc, 2016/08/04 16:36:27]

Done.

+        int numRadialGradients;
+        int numLinearGradients;
         int numPatterns;
         int numDrawWithComplexClips;
         int numBlurredShadows;
         double boundingBoxAreaTimesShadowBlurSquared;
         double boundingBoxPerimeterTimesShadowBlurSquared;
         int numFilters;
         int numGetImageDataCalls;
         double areaGetImageDataCalls;
         int numPutImageDataCalls;
         double areaPutImageDataCalls;
@@ skipping 135 matching lines @@
     foregroundPaint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
     c->setMatrix(ctm);
     drawFunc(c, &foregroundPaint);
     c->restore();
     c->setMatrix(ctm);
 }
 
 } // namespace blink
 
 #endif // BaseRenderingContext2D_h