1 /* 2 * Copyright 2018 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 "SkCanvas.h" 10 #include "SkPaint.h" 11 12 // The root cause of this bug was that when dual source blending was not supported and we made a 13 // copy of the destination to perform blending we would clip the copy bounds to the current clip. 14 // However, it is possible for anti-aliased that are fully contained by the clip in a geometric 15 // sense to actually draw outside the clip in pixel space because we don't consider aa bloat when 16 // determining if the draw is contained by the clip. 17 DEF_SIMPLE_GM(crbug_892988, canvas, 256, 256) { 18 SkPaint paint1; 19 paint1.setStyle(SkPaint::kStroke_Style); 20 paint1.setStrokeWidth(1.f); 21 paint1.setAntiAlias(true); 22 canvas->drawRect(SkRect::MakeLTRB(11.5, 0.5, 245.5, 245.5), paint1); 23 canvas->clipRect(SkRect::MakeLTRB(12, 1, 244, 244), true); 24 SkPaint paint2; 25 // Use src mode with a non-opaque color to produce a blend that can't be handled with 26 // simple blend coefficients. 27 paint2.setColor(0xF0FFFFFF); 28 paint2.setBlendMode(SkBlendMode::kSrc); 29 paint2.setAntiAlias(true); 30 canvas->drawRect(SkRect::MakeLTRB(12, 1, 244, 244), paint2); 31 } 32