1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "skia/ext/paint_simplifier.h" 6 #include "third_party/skia/include/core/SkPaint.h" 7 #include "third_party/skia/include/core/SkShader.h" 8 9 namespace skia { 10 namespace { 11 PaintHasBitmap(const SkPaint & paint)12bool PaintHasBitmap(const SkPaint &paint) { 13 SkShader* shader = paint.getShader(); 14 if (!shader) 15 return false; 16 17 if (shader->asAGradient(NULL) == SkShader::kNone_GradientType) 18 return false; 19 20 return shader->asABitmap(NULL, NULL, NULL) != SkShader::kNone_BitmapType; 21 } 22 23 } // namespace 24 PaintSimplifier()25PaintSimplifier::PaintSimplifier() 26 : INHERITED() { 27 28 } 29 ~PaintSimplifier()30PaintSimplifier::~PaintSimplifier() { 31 32 } 33 filter(SkPaint * paint,Type type)34bool PaintSimplifier::filter(SkPaint* paint, Type type) { 35 // Bitmaps are expensive. Skip draw if type has a bitmap. 36 if (type == kBitmap_Type || PaintHasBitmap(*paint)) 37 return false; 38 39 // Preserve a modicum of text quality; black & white text is 40 // just too blocky, even during a fling. 41 if (type != kText_Type) { 42 paint->setAntiAlias(false); 43 } 44 paint->setSubpixelText(false); 45 paint->setLCDRenderText(false); 46 47 paint->setMaskFilter(NULL); 48 49 // Uncomment this line to shade simplified tiles pink during debugging. 50 //paint->setColor(SkColorSetRGB(255, 127, 127)); 51 52 return true; 53 } 54 55 56 } // namespace skia 57 58 59