| /* |
| * Copyright 2023 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkTileMode.h" |
| #include "tools/Resources.h" |
| |
| DEF_SIMPLE_GM(coordclampshader, canvas, 1074, 795) { |
| auto image = GetResourceAsImage("images/mandrill_256.png"); |
| if (!image) { |
| return; |
| } |
| // The mandrill_512 image has a bottom row of mostly black pixels. Remove it. |
| image = image->makeSubset(SkIRect::MakeWH(image->width(), image->height() - 1)); |
| image = image->withDefaultMipmaps(); |
| |
| auto imageShader = image->makeShader(SkSamplingOptions{SkFilterMode::kLinear}); |
| |
| SkPaint paint; |
| |
| auto drawRect = SkRect::Make(image->dimensions()); |
| |
| auto rotate = SkMatrix::RotateDeg(45.f, drawRect.center()); |
| |
| auto clampRect = drawRect.makeInset(20, 40); |
| |
| canvas->translate(10, 10); |
| |
| auto shader = SkShaders::CoordClamp(imageShader, clampRect); |
| paint.setShader(std::move(shader)); |
| canvas->drawRect(drawRect, paint); |
| |
| canvas->save(); |
| canvas->translate(image->width(), 0); |
| shader = SkShaders::CoordClamp(imageShader->makeWithLocalMatrix(rotate), clampRect); |
| paint.setShader(std::move(shader)); |
| canvas->drawRect(drawRect, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(0, image->height()); |
| shader = SkShaders::CoordClamp(imageShader, clampRect)->makeWithLocalMatrix(rotate); |
| paint.setShader(std::move(shader)); |
| canvas->drawRect(drawRect, paint); |
| canvas->restore(); |
| |
| canvas->save(); |
| canvas->translate(image->width(), image->height()); |
| shader = SkShaders::CoordClamp(imageShader->makeWithLocalMatrix(rotate), clampRect) |
| ->makeWithLocalMatrix(rotate); |
| paint.setShader(std::move(shader)); |
| canvas->drawRect(drawRect, paint); |
| canvas->restore(); |
| |
| canvas->translate(0, 2 * image->height() + 10); |
| |
| static const SkSamplingOptions kSamplers[] = { |
| SkSamplingOptions{SkFilterMode::kNearest}, |
| SkSamplingOptions{SkFilterMode::kLinear}, |
| SkSamplingOptions{SkFilterMode::kLinear, SkMipmapMode::kLinear}, |
| SkSamplingOptions::Aniso(16) |
| }; |
| |
| for (const auto& sampler : kSamplers) { |
| imageShader = image->makeShader(SkTileMode::kMirror, |
| SkTileMode::kMirror, |
| sampler, |
| SkMatrix::Scale(0.3f, 1.0)); |
| |
| shader = SkShaders::CoordClamp(imageShader, clampRect); |
| paint.setShader(std::move(shader)); |
| canvas->drawRect(drawRect, paint); |
| |
| canvas->translate(image->width() + 10, 0); |
| } |
| } |