1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "gm.h" 9 10 namespace skiagm { 11 12 // This GM exercises the use case found in crbug.com/423834. 13 // The following pattern: 14 // save(); 15 // clipRect(rect, noAA); 16 // drawRect(bigRect, noAA); 17 // restore(); 18 // 19 // drawRect(rect, noAA); 20 // can leave 1 pixel wide remnants of the first rect. 21 class ClipDrawDrawGM : public GM { 22 public: ClipDrawDrawGM()23 ClipDrawDrawGM() { this->setBGColor(0xFFCCCCCC); } 24 25 protected: onShortName()26 SkString onShortName() override { return SkString("clipdrawdraw"); } 27 onISize()28 SkISize onISize() override { return SkISize::Make(512, 512); } 29 Draw(SkCanvas * canvas,const SkRect & rect)30 static void Draw(SkCanvas* canvas, const SkRect& rect) { 31 SkPaint p; 32 p.setAntiAlias(false); 33 34 const SkRect bigRect = SkRect::MakeWH(600, 600); 35 36 canvas->save(); 37 // draw a black rect through the clip 38 canvas->save(); 39 canvas->clipRect(rect); 40 canvas->drawRect(bigRect, p); 41 canvas->restore(); 42 43 // now draw the white rect on top 44 p.setColor(SK_ColorWHITE); 45 canvas->drawRect(rect, p); 46 canvas->restore(); 47 } 48 onDraw(SkCanvas * canvas)49 void onDraw(SkCanvas* canvas) override { 50 // Vertical remnant 51 const SkRect rect1 = SkRect::MakeLTRB(136.5f, 137.5f, 338.5f, 293.5f); 52 53 // Horizontal remnant 54 // 179.488 rounds the right way (i.e., 179), 179.499 rounds the wrong way (i.e., 180) 55 const SkRect rect2 = SkRect::MakeLTRB(207.5f, 179.499f, 530.5f, 429.5f); 56 57 Draw(canvas, rect1); 58 Draw(canvas, rect2); 59 } 60 61 private: 62 typedef GM INHERITED; 63 }; 64 65 ////////////////////////////////////////////////////////////////////////////// 66 67 DEF_GM(return SkNEW(ClipDrawDrawGM);) 68 69 } 70