| John Stiles | 0397ae4 | 2021-07-15 11:18:37 -0400 | [diff] [blame] | 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/SkBitmap.h" |
| 10 | #include "include/core/SkCanvas.h" |
| 11 | #include "include/core/SkPaint.h" |
| 12 | #include "include/core/SkSize.h" |
| 13 | #include "include/core/SkSurface.h" |
| 14 | #include "include/effects/SkRuntimeEffect.h" |
| 15 | #include "src/gpu/GrCaps.h" |
| 16 | #include "src/gpu/GrDirectContextPriv.h" |
| 17 | #include "tests/Test.h" |
| 18 | #include "tools/Resources.h" |
| 19 | #include "tools/RuntimeBlendUtils.h" |
| 20 | #include "tools/ToolUtils.h" |
| 21 | |
| 22 | static bool nearly_equal(const SkColor& x, const SkColor& y) { |
| 23 | const int kTolerance = 1; |
| 24 | return abs((int)SkColorGetA(x) - (int)SkColorGetA(y)) <= kTolerance && |
| 25 | abs((int)SkColorGetR(x) - (int)SkColorGetR(y)) <= kTolerance && |
| 26 | abs((int)SkColorGetG(x) - (int)SkColorGetG(y)) <= kTolerance && |
| 27 | abs((int)SkColorGetB(x) - (int)SkColorGetB(y)) <= kTolerance; |
| 28 | } |
| 29 | |
| 30 | static void test_blend(skiatest::Reporter* r, SkSurface* surface) { |
| 31 | SkBitmap bitmap; |
| 32 | REPORTER_ASSERT(r, bitmap.tryAllocPixels(surface->imageInfo())); |
| 33 | |
| 34 | for (int m = 0; m <= (int)SkBlendMode::kLastMode; ++m) { |
| 35 | SkBlendMode mode = (SkBlendMode)m; |
| 36 | for (int alpha : {0x80, 0xFF}) { |
| 37 | std::vector<SkColor> colors; |
| 38 | for (bool useRuntimeBlend : {false, true}) { |
| 39 | // Draw a solid red pixel. |
| 40 | SkPaint paint; |
| 41 | paint.setColor(SK_ColorRED); |
| 42 | paint.setBlendMode(SkBlendMode::kSrc); |
| 43 | surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint); |
| 44 | |
| 45 | // Draw a blue pixel on top of it, using the passed-in blend mode. |
| 46 | paint.setColor(SkColorSetARGB(alpha, 0x00, 0x00, 0xFF)); |
| 47 | if (useRuntimeBlend) { |
| 48 | paint.setBlender(GetRuntimeBlendForBlendMode(mode)); |
| 49 | } else { |
| 50 | paint.setBlendMode(mode); |
| 51 | } |
| 52 | surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint); |
| 53 | |
| 54 | // Read back the red/blue blended pixel. |
| 55 | REPORTER_ASSERT(r, surface->readPixels(bitmap.info(), bitmap.getPixels(), |
| 56 | bitmap.rowBytes(), /*srcX=*/0, /*srcY=*/0)); |
| 57 | colors.push_back(bitmap.getColor(/*x=*/0, /*y=*/0)); |
| 58 | } |
| 59 | |
| 60 | REPORTER_ASSERT(r, nearly_equal(colors[0], colors[1]), |
| 61 | "Expected: %s %s blend matches. Actual: Built-in " |
| 62 | "A=%02X R=%02X G=%02X B=%02X, Runtime A=%02X R=%02X G=%02X B=%02X", |
| 63 | SkBlendMode_Name(mode), |
| 64 | (alpha == 0xFF) ? "solid" : "transparent", |
| 65 | SkColorGetA(colors[0]), |
| 66 | SkColorGetR(colors[0]), |
| 67 | SkColorGetG(colors[0]), |
| 68 | SkColorGetB(colors[0]), |
| 69 | SkColorGetA(colors[1]), |
| 70 | SkColorGetR(colors[1]), |
| 71 | SkColorGetG(colors[1]), |
| 72 | SkColorGetB(colors[1])); |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | DEF_TEST(SkRuntimeBlender_CPU, r) { |
| 78 | const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1); |
| 79 | sk_sp<SkSurface> surface(SkSurface::MakeRaster(info)); |
| 80 | |
| 81 | test_blend(r, surface.get()); |
| 82 | } |
| 83 | |
| 84 | DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SkRuntimeBlender_GPU, r, ctxInfo) { |
| 85 | const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1); |
| 86 | sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(ctxInfo.directContext(), |
| 87 | SkBudgeted::kNo, info)); |
| 88 | test_blend(r, surface.get()); |
| 89 | } |