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 // Bad quads dumped from SkiaRenderer in crbug.com/1178833. These should all draw as really thin 15 // lines. 16 DEF_SIMPLE_GM(crbug_1177833, canvas, 400, 400) { 17 canvas->clear(SK_ColorBLACK); 18 canvas->translate(-700, -700); 19 // This quad had two issues. The inset collapsed the inner 2D projected quad to a point but 20 // didn't enable enough degrees of freedom to adjust the 4 3D points to project to that point. 21 // Also, the outset produced a 2D projected point far away from the original quad but the 22 // shader was not checking the geometric subset and so pixels far away from the projection of 23 // the quad would have positive coverage. 24 { 25 canvas->save(); 26 canvas->concat(SkMatrix::MakeAll(SkBits2Float(0xbf79250e), SkBits2Float(0x3e9da860), SkBits2Float(0x44914c8a), 27 SkBits2Float(0xbf982962), SkBits2Float(0xbf280002), SkBits2Float(0x44c3116e), 28 SkBits2Float(0xba9bfe62), SkBits2Float(0x39d10455), SkBits2Float(0x3fc9b377))); 29 SkRect rect = {SkBits2Float(0x00000000), 30 SkBits2Float(0x00000000), 31 SkBits2Float(0x40a00000), 32 SkBits2Float(0x43560000)}; 33 SkPoint clip[4] = {{SkBits2Float(0x409fff57), SkBits2Float(0x40c86a18)}, 34 {SkBits2Float(0x409fff57), SkBits2Float(0x4314dc8c)}, 35 {SkBits2Float(0x407f6b0d), SkBits2Float(0x43157fff)}, 36 {SkBits2Float(0x4040859c), SkBits2Float(0x43140374)}}; 37 SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(0x00000002); 38 SkColor4f color = {SkBits2Float(0x3f6eeef0), 39 SkBits2Float(0x3f6eeef0), 40 SkBits2Float(0x3f6eeef0), 41 SkBits2Float(0x3f800000)}; 42 SkBlendMode mode = static_cast<SkBlendMode>(0x00000003); 43 canvas->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, color, mode); 44 canvas->restore(); 45 } 46 // This quad also exposed the inset collapse to a point without enough degrees of freedom issue. 47 canvas->save(); 48 canvas->translate(-300, 0); 49 { 50 canvas->save(); 51 canvas->concat(SkMatrix::MakeAll(SkBits2Float(0x3f54dd8a), SkBits2Float(0xbf9096a4), SkBits2Float(0x447eae34), 52 SkBits2Float(0x3f3f6905), SkBits2Float(0xbe5208ba), SkBits2Float(0x4418118b), 53 SkBits2Float(0x3aa134a1), SkBits2Float(0xb93ef249), SkBits2Float(0x3f580bd4))); 54 SkRect rect = {SkBits2Float(0x00000000), 55 SkBits2Float(0x00000000), 56 SkBits2Float(0x40a00000), 57 SkBits2Float(0x43560000)}; 58 SkPoint clip[4] = {{SkBits2Float(0x40a0000e), SkBits2Float(0x40c86b5a)}, 59 {SkBits2Float(0x40a0001e), SkBits2Float(0x4314dd5f)}, 60 {SkBits2Float(0x407f76eb), SkBits2Float(0x431580c2)}, 61 {SkBits2Float(0x404092e7), SkBits2Float(0x43140445)}}; 62 SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(0x00000002); 63 SkColor4f color = {SkBits2Float(0x3f6eeef0), 64 SkBits2Float(0x3f6eeef0), 65 SkBits2Float(0x3f6eeef0), 66 SkBits2Float(0x3f800000)}; 67 SkBlendMode mode = static_cast<SkBlendMode>(0x00000003); 68 canvas->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, color, mode); 69 canvas->restore(); 70 } 71 canvas->restore(); 72 // This quad exposed a similar issue to the point issue above, but when collapsing to a 73 // triangle. When a 2D quad edge collapsed from insetting we'd replace it with a point off of 74 // its adjacent edges. We need to ensure the code that moves the 3D point that projects to 75 // the 2D point has 2 degrees of freedom so it can find the correct 3D point. 76 { 77 canvas->save(); 78 canvas->concat(SkMatrix::MakeAll(SkBits2Float(0x3f54b255), SkBits2Float(0x3eb5a94d), SkBits2Float(0x443d7419), 79 SkBits2Float(0x3f885d66), SkBits2Float(0x3f5a6b9c), SkBits2Float(0x443c7334), 80 SkBits2Float(0x3aa95ea5), SkBits2Float(0xb8a1391e), SkBits2Float(0x3f84dde5))); 81 SkRect rect = {SkBits2Float(0x00000000), 82 SkBits2Float(0x00000000), 83 SkBits2Float(0x40a00000), 84 SkBits2Float(0x43100000)}; 85 SkPoint clip[4] = {{SkBits2Float(0x405a654c), SkBits2Float(0x42e8c790)}, 86 {SkBits2Float(0x3728c61b), SkBits2Float(0x42e7df31)}, 87 {SkBits2Float(0xb678ecc5), SkBits2Float(0x412db4e0)}, 88 {SkBits2Float(0x4024b2ad), SkBits2Float(0x413ab3ed)}}; 89 SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(0x00000004); 90 SkColor4f color = {SkBits2Float(0x3f800000), 91 SkBits2Float(0x3f800000), 92 SkBits2Float(0x3f800000), 93 SkBits2Float(0x3f800000)}; 94 SkBlendMode mode = static_cast<SkBlendMode>(0x00000003); 95 canvas->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, color, mode); 96 canvas->restore(); 97 } 98 } 99 100