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 #include "SkRegion.h" 10 11 // This GM exercises the use case found in crbug.com/423834. 12 // The following pattern: 13 // save(); 14 // clipRect(rect, noAA); 15 // drawRect(bigRect, noAA); 16 // restore(); 17 // 18 // drawRect(rect, noAA); 19 // can leave 1 pixel wide remnants of the first rect. 20 static void Draw(SkCanvas* canvas, const SkRect& rect) { 21 SkPaint p; 22 p.setAntiAlias(false); 23 24 const SkRect bigRect = SkRect::MakeWH(600, 600); 25 26 canvas->save(); 27 // draw a black rect through the clip 28 canvas->save(); 29 canvas->clipRect(rect); 30 canvas->drawRect(bigRect, p); 31 canvas->restore(); 32 33 // now draw the white rect on top 34 p.setColor(SK_ColorWHITE); 35 canvas->drawRect(rect, p); 36 canvas->restore(); 37 } 38 39 DEF_SIMPLE_GM_BG(clipdrawdraw, canvas, 512, 512, 0xFFCCCCCC) { 40 // Vertical remnant 41 const SkRect rect1 = SkRect::MakeLTRB(136.5f, 137.5f, 338.5f, 293.5f); 42 43 // Horizontal remnant 44 // 179.488 rounds the right way (i.e., 179), 179.499 rounds the wrong way (i.e., 180) 45 const SkRect rect2 = SkRect::MakeLTRB(207.5f, 179.499f, 530.5f, 429.5f); 46 47 Draw(canvas, rect1); 48 Draw(canvas, rect2); 49 } 50 51 /////////////////////////////////////////////////////////////////////////////////////////////////// 52 53 DEF_SIMPLE_GM(clip_region, canvas, 256, 256) { 54 SkRegion rgn({ 10, 10, 100, 100 }); 55 56 canvas->save(); 57 canvas->clipRegion(rgn); 58 canvas->drawColor(SK_ColorRED); 59 canvas->restore(); 60 61 SkRect bounds = { 30, 30, 80, 80 }; 62 canvas->saveLayer(&bounds, nullptr); 63 canvas->clipRegion(rgn); 64 canvas->drawColor(SK_ColorBLUE); 65 canvas->restore(); 66 } 67
