| /* |
| * Copyright 2019 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkSurface.h" |
| #include "include/effects/SkColorMatrix.h" |
| #include "include/gpu/GrDirectContext.h" |
| #include "src/core/SkAutoPixmapStorage.h" |
| #include "tests/Test.h" |
| #include "tests/TestUtils.h" |
| |
| DEF_GPUTEST_FOR_RENDERING_CONTEXTS(MatrixColorFilter_TransparentBlack, reporter, info) { |
| auto context = info.directContext(); |
| // Make a transparent black image rather than use a paint color to avoid an optimization that |
| // applies the color filter on the CPU to paint colors. |
| auto imgSurf = SkSurface::MakeRenderTarget(context, SkBudgeted::kYes, |
| SkImageInfo::MakeN32(5, 5, kPremul_SkAlphaType)); |
| imgSurf->getCanvas()->drawColor(0x0000000); |
| auto shader = imgSurf->makeImageSnapshot()->makeShader(SkSamplingOptions()); |
| SkColorMatrix m; |
| m.setScale(0, 0, 0, 127.f); |
| SkPaint p; |
| p.setColorFilter(SkColorFilters::Matrix(m)); |
| p.setShader(shader); |
| p.setBlendMode(SkBlendMode::kSrc); |
| auto surf = SkSurface::MakeRenderTarget(context, SkBudgeted::kYes, |
| SkImageInfo::MakeN32(5, 5, kPremul_SkAlphaType)); |
| // Seed the output surface with red so we would notice if we failed to draw at all. |
| surf->getCanvas()->clear(SK_ColorRED); |
| surf->getCanvas()->drawPaint(p); |
| SkAutoPixmapStorage pixels; |
| pixels.alloc(surf->imageInfo()); |
| surf->readPixels(pixels, 0, 0); |
| auto error = std::function<ComparePixmapsErrorReporter>( |
| [reporter](int x, int y, const float diffs[4]) { |
| ERRORF(reporter, "Expected transparent black, instead got (%f, %f, %f, %f)", |
| diffs[0], diffs[1], diffs[2], diffs[3]); |
| }); |
| static constexpr float kTol[] = {0, 0, 0, 0}; |
| CheckSolidPixels({0, 0, 0, 0}, pixels, kTol, error); |
| } |