| /* |
| * Copyright 2018 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/SkRefCnt.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/private/base/SkTArray.h" |
| #include "include/private/base/SkTDArray.h" |
| #include "tools/Resources.h" |
| #include "tools/ToolUtils.h" |
| |
| #include <initializer_list> |
| |
| static sk_sp<SkImage> make_image1() { return GetResourceAsImage("images/mandrill_128.png"); } |
| |
| static sk_sp<SkImage> make_image2() { |
| return GetResourceAsImage("images/brickwork-texture.jpg")->makeSubset({0, 0, 128, 128}); |
| } |
| |
| namespace skiagm { |
| |
| class PerspImages : public GM { |
| public: |
| PerspImages() = default; |
| |
| protected: |
| SkString onShortName() override { return SkString("persp_images"); } |
| |
| SkISize onISize() override { return SkISize::Make(1150, 1280); } |
| |
| void onOnceBeforeDraw() override { |
| fImages.push_back(make_image1()); |
| fImages.push_back(make_image2()); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkTDArray<SkMatrix> matrices; |
| matrices.append()->setAll(1.f, 0.f, 0.f, |
| 0.f, 1.f, 0.f, |
| 0.f, 0.005f, 1.f); |
| matrices.append()->setAll(1.f, 0.f, 0.f, |
| 0.f, 1.f, 0.f, |
| 0.007f, -0.005f, 1.f); |
| matrices[1].preSkew(0.2f, -0.1f); |
| matrices[1].preRotate(-65.f); |
| matrices[1].preScale(1.2f, .8f); |
| matrices[1].postTranslate(0.f, 60.f); |
| SkPaint paint; |
| int n = 0; |
| SkRect bounds = SkRect::MakeEmpty(); |
| for (const auto& img : fImages) { |
| SkRect imgB = SkRect::MakeWH(img->width(), img->height()); |
| for (const auto& m : matrices) { |
| SkRect temp; |
| m.mapRect(&temp, imgB); |
| bounds.join(temp); |
| } |
| } |
| canvas->translate(-bounds.fLeft + 10.f, -bounds.fTop + 10.f); |
| canvas->save(); |
| enum class DrawType { |
| kDrawImage, |
| kDrawImageRectStrict, |
| kDrawImageRectFast, |
| }; |
| for (auto type : |
| {DrawType::kDrawImage, DrawType::kDrawImageRectStrict, DrawType::kDrawImageRectFast}) { |
| for (const auto& m : matrices) { |
| for (auto aa : {false, true}) { |
| paint.setAntiAlias(aa); |
| for (auto sampling : { |
| SkSamplingOptions(SkFilterMode::kNearest), |
| SkSamplingOptions(SkFilterMode::kLinear), |
| SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear), |
| SkSamplingOptions(SkCubicResampler::Mitchell())}) { |
| for (const auto& origImage : fImages) { |
| sk_sp<SkImage> img = ToolUtils::MakeTextureImage(canvas, origImage); |
| if (img) { |
| canvas->save(); |
| canvas->concat(m); |
| SkRect src = { img->width() / 4.f, img->height() / 4.f, |
| 3.f * img->width() / 4.f, 3.f * img->height() / 4 }; |
| SkRect dst = { 0, 0, |
| 3.f / 4.f * img->width(), 3.f / 4.f * img->height()}; |
| switch (type) { |
| case DrawType::kDrawImage: |
| canvas->drawImage(img, 0, 0, sampling, &paint); |
| break; |
| case DrawType::kDrawImageRectStrict: |
| canvas->drawImageRect(img, src, dst, sampling, &paint, |
| SkCanvas::kStrict_SrcRectConstraint); |
| break; |
| case DrawType::kDrawImageRectFast: |
| canvas->drawImageRect(img, src, dst, sampling, &paint, |
| SkCanvas::kFast_SrcRectConstraint); |
| break; |
| } |
| canvas->restore(); |
| } |
| ++n; |
| if (n < 8) { |
| canvas->translate(bounds.width() + 10.f, 0); |
| } else { |
| canvas->restore(); |
| canvas->translate(0, bounds.height() + 10.f); |
| canvas->save(); |
| n = 0; |
| } |
| } |
| } |
| } |
| } |
| } |
| canvas->restore(); |
| } |
| |
| private: |
| inline static constexpr int kNumImages = 4; |
| SkTArray<sk_sp<SkImage>> fImages; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new PerspImages();) |
| |
| } // namespace skiagm |