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 13 // Bad quads dumped from SkiaRenderer in crbug.com/1178833. These should all draw as really thin 14 // lines. 15 DEF_SIMPLE_GM(crbug_1177833, canvas, 400, 400) { 16 canvas->clear(SK_ColorBLACK); 17 canvas->translate(-700, -700); 18 // This quad had two issues. The inset collapsed the inner 2D projected quad to a point but 19 // didn't enable enough degrees of freedom to adjust the 4 3D points to project to that point. 20 // Also, the outset produced a 2D projected point far away from the original quad but the 21 // shader was not checking the geometric subset and so pixels far away from the projection of 22 // the quad would have positive coverage. 23 { 24 canvas->save(); 25 canvas->concat(SkMatrix::MakeAll(SkBits2Float(0xbf79250e), SkBits2Float(0x3e9da860), SkBits2Float(0x44914c8a), 26 SkBits2Float(0xbf982962), SkBits2Float(0xbf280002), SkBits2Float(0x44c3116e), 27 SkBits2Float(0xba9bfe62), SkBits2Float(0x39d10455), SkBits2Float(0x3fc9b377))); 28 SkRect rect = {SkBits2Float(0x00000000), 29 SkBits2Float(0x00000000), 30 SkBits2Float(0x40a00000), 31 SkBits2Float(0x43560000)}; 32 SkPoint clip[4] = {{SkBits2Float(0x409fff57), SkBits2Float(0x40c86a18)}, 33 {SkBits2Float(0x409fff57), SkBits2Float(0x4314dc8c)}, 34 {SkBits2Float(0x407f6b0d), SkBits2Float(0x43157fff)}, 35 {SkBits2Float(0x4040859c), SkBits2Float(0x43140374)}}; 36 SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(0x00000002); 37 SkColor4f color = {SkBits2Float(0x3f6eeef0), 38 SkBits2Float(0x3f6eeef0), 39 SkBits2Float(0x3f6eeef0), 40 SkBits2Float(0x3f800000)}; 41 SkBlendMode mode = static_cast<SkBlendMode>(0x00000003); 42 canvas->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, color, mode); 43 canvas->restore(); 44 } 45 // This quad also exposed the inset collapse to a point without enough degrees of freedom issue. 46 canvas->save(); 47 canvas->translate(-300, 0); 48 { 49 canvas->save(); 50 canvas->concat(SkMatrix::MakeAll(SkBits2Float(0x3f54dd8a), SkBits2Float(0xbf9096a4), SkBits2Float(0x447eae34), 51 SkBits2Float(0x3f3f6905), SkBits2Float(0xbe5208ba), SkBits2Float(0x4418118b), 52 SkBits2Float(0x3aa134a1), SkBits2Float(0xb93ef249), SkBits2Float(0x3f580bd4))); 53 SkRect rect = {SkBits2Float(0x00000000), 54 SkBits2Float(0x00000000), 55 SkBits2Float(0x40a00000), 56 SkBits2Float(0x43560000)}; 57 SkPoint clip[4] = {{SkBits2Float(0x40a0000e), SkBits2Float(0x40c86b5a)}, 58 {SkBits2Float(0x40a0001e), SkBits2Float(0x4314dd5f)}, 59 {SkBits2Float(0x407f76eb), SkBits2Float(0x431580c2)}, 60 {SkBits2Float(0x404092e7), SkBits2Float(0x43140445)}}; 61 SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(0x00000002); 62 SkColor4f color = {SkBits2Float(0x3f6eeef0), 63 SkBits2Float(0x3f6eeef0), 64 SkBits2Float(0x3f6eeef0), 65 SkBits2Float(0x3f800000)}; 66 SkBlendMode mode = static_cast<SkBlendMode>(0x00000003); 67 canvas->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, color, mode); 68 canvas->restore(); 69 } 70 canvas->restore(); 71 // This quad exposed a similar issue to the point issue above, but when collapsing to a 72 // triangle. When a 2D quad edge collapsed from insetting we'd replace it with a point off of 73 // its adjacent edges. We need to ensure the code that moves the 3D point that projects to 74 // the 2D point has 2 degrees of freedom so it can find the correct 3D point. 75 { 76 canvas->save(); 77 canvas->concat(SkMatrix::MakeAll(SkBits2Float(0x3f54b255), SkBits2Float(0x3eb5a94d), SkBits2Float(0x443d7419), 78 SkBits2Float(0x3f885d66), SkBits2Float(0x3f5a6b9c), SkBits2Float(0x443c7334), 79 SkBits2Float(0x3aa95ea5), SkBits2Float(0xb8a1391e), SkBits2Float(0x3f84dde5))); 80 SkRect rect = {SkBits2Float(0x00000000), 81 SkBits2Float(0x00000000), 82 SkBits2Float(0x40a00000), 83 SkBits2Float(0x43100000)}; 84 SkPoint clip[4] = {{SkBits2Float(0x405a654c), SkBits2Float(0x42e8c790)}, 85 {SkBits2Float(0x3728c61b), SkBits2Float(0x42e7df31)}, 86 {SkBits2Float(0xb678ecc5), SkBits2Float(0x412db4e0)}, 87 {SkBits2Float(0x4024b2ad), SkBits2Float(0x413ab3ed)}}; 88 SkCanvas::QuadAAFlags aaFlags = static_cast<SkCanvas::QuadAAFlags>(0x00000004); 89 SkColor4f color = {SkBits2Float(0x3f800000), 90 SkBits2Float(0x3f800000), 91 SkBits2Float(0x3f800000), 92 SkBits2Float(0x3f800000)}; 93 SkBlendMode mode = static_cast<SkBlendMode>(0x00000003); 94 canvas->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, color, mode); 95 canvas->restore(); 96 } 97 } 98 99