1 /* 2 * Copyright 2021 Google LLC 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/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkMatrix.h" 11 #include "include/core/SkRect.h" 12 #include "src/base/SkFloatBits.h" 13 14 // Outsetting of very thin, nearly line, quads for AA would go haywire and draw far outside of the 15 // quad. Artifacts seemed to occur more when coord values are large, hence the large GM size. At the 16 // time of GM creation this was fixed by dropping AA, which makes these quads practically never draw 17 // as it's very unlikely a pixel center would fall inside the geometry. 18 DEF_SIMPLE_GM(crbug_1174186, canvas, 1200, 1200) { 19 auto m = SkMatrix::MakeAll( 20 SkBits2Float(0x24480629), SkBits2Float(0xbf3555c2), SkBits2Float(0x4377d67b), 21 SkBits2Float(0x23a61d51), SkBits2Float(0x3f34b400), SkBits2Float(0x4453f572), 22 SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x3f800000)); 23 24 SkPoint pts[] = {{SkBits2Float(0x3f7ffff2), SkBits2Float(0x43483d60)}, 25 {SkBits2Float(0x00000000), SkBits2Float(0x43483d60)}, 26 {SkBits2Float(0x00000000), SkBits2Float(0x4311a628)}, 27 {SkBits2Float(0x3f800000), SkBits2Float(0x43130f8c)}}; 28 SkColor color = SK_ColorGREEN; 29 canvas->translate(-500, 0); 30 for (int i = 0; i < 10; ++i) { 31 for (int flags = 0; flags < static_cast<int>(SkCanvas::kAll_QuadAAFlags); ++flags) { 32 SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(flags); 33 canvas->save(); 34 canvas->concat(m); 35 canvas->experimental_DrawEdgeAAQuad(SkRect::MakeWH(1000, 1000), pts, aaFlags, color, 36 SkBlendMode::kSrcOver); 37 canvas->restore(); 38 canvas->translate(5.1f, 0); 39 SkColor rgb = color & 0x00FFFFFF; 40 color = 0xFF000000 | (rgb << 4) | (rgb >> 20); 41 } 42 } 43 } 44