| /* |
| * Copyright 2021 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkBlendMode.h" |
| #include "include/core/SkBlender.h" // IWYU pragma: keep |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTypes.h" |
| #include "include/gpu/GpuTypes.h" |
| #include "include/gpu/GrDirectContext.h" |
| #include "tests/CtsEnforcement.h" |
| #include "tests/Test.h" |
| #include "tools/RuntimeBlendUtils.h" |
| |
| #include <cmath> |
| #include <initializer_list> |
| #include <vector> |
| |
| struct GrContextOptions; |
| |
| static bool nearly_equal(const SkColor& x, const SkColor& y) { |
| const int kTolerance = 1; |
| return abs((int)SkColorGetA(x) - (int)SkColorGetA(y)) <= kTolerance && |
| abs((int)SkColorGetR(x) - (int)SkColorGetR(y)) <= kTolerance && |
| abs((int)SkColorGetG(x) - (int)SkColorGetG(y)) <= kTolerance && |
| abs((int)SkColorGetB(x) - (int)SkColorGetB(y)) <= kTolerance; |
| } |
| |
| static void test_blend(skiatest::Reporter* r, SkSurface* surface) { |
| SkBitmap bitmap; |
| REPORTER_ASSERT(r, bitmap.tryAllocPixels(surface->imageInfo())); |
| |
| for (int m = 0; m < kSkBlendModeCount; ++m) { |
| SkBlendMode mode = (SkBlendMode)m; |
| for (int alpha : {0x80, 0xFF}) { |
| for (bool useShader : {false, true}) { |
| std::vector<SkColor> colors; |
| for (bool useRuntimeBlend : {false, true}) { |
| // Draw a solid red pixel. |
| SkPaint paint; |
| paint.setColor(SK_ColorRED); |
| paint.setBlendMode(SkBlendMode::kSrc); |
| surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint); |
| |
| // Draw a blue pixel on top of it, using the passed-in blend mode. |
| if (useShader) { |
| // Install a different color in the paint, to ensure we're using the shader |
| paint.setColor(SK_ColorGREEN); |
| paint.setShader(SkShaders::Color(SkColorSetARGB(alpha, 0x00, 0x00, 0xFF))); |
| } else { |
| paint.setColor(SkColorSetARGB(alpha, 0x00, 0x00, 0xFF)); |
| } |
| if (useRuntimeBlend) { |
| paint.setBlender(GetRuntimeBlendForBlendMode(mode)); |
| } else { |
| paint.setBlendMode(mode); |
| } |
| surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint); |
| |
| // Read back the red/blue blended pixel. |
| REPORTER_ASSERT(r, |
| surface->readPixels(bitmap.info(), |
| bitmap.getPixels(), |
| bitmap.rowBytes(), |
| /*srcX=*/0, |
| /*srcY=*/0)); |
| colors.push_back(bitmap.getColor(/*x=*/0, /*y=*/0)); |
| } |
| |
| REPORTER_ASSERT(r, |
| nearly_equal(colors[0], colors[1]), |
| "Expected: %s %s %s blend matches. Actual: Built-in " |
| "A=%02X R=%02X G=%02X B=%02X, Runtime A=%02X R=%02X G=%02X B=%02X", |
| SkBlendMode_Name(mode), |
| (alpha == 0xFF) ? "solid" : "transparent", |
| useShader ? "shader" : "paint", |
| SkColorGetA(colors[0]), |
| SkColorGetR(colors[0]), |
| SkColorGetG(colors[0]), |
| SkColorGetB(colors[0]), |
| SkColorGetA(colors[1]), |
| SkColorGetR(colors[1]), |
| SkColorGetG(colors[1]), |
| SkColorGetB(colors[1])); |
| } |
| } |
| } |
| } |
| |
| DEF_TEST(SkRuntimeBlender_CPU, r) { |
| const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1); |
| sk_sp<SkSurface> surface(SkSurface::MakeRaster(info)); |
| |
| test_blend(r, surface.get()); |
| } |
| |
| DEF_GANESH_TEST_FOR_RENDERING_CONTEXTS(SkRuntimeBlender_GPU, |
| r, |
| ctxInfo, |
| CtsEnforcement::kApiLevel_T) { |
| const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1); |
| sk_sp<SkSurface> surface( |
| SkSurface::MakeRenderTarget(ctxInfo.directContext(), skgpu::Budgeted::kNo, info)); |
| test_blend(r, surface.get()); |
| } |