| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| // This test only works with the GPU backend. |
| |
| #include "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPixmap.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "include/gpu/GrBackendSurface.h" |
| #include "include/gpu/GrDirectContext.h" |
| #include "include/gpu/GrTypes.h" |
| #include "include/private/base/SkTo.h" |
| #include "src/base/SkMathPriv.h" |
| #include "src/core/SkYUVMath.h" |
| #include "tools/Resources.h" |
| #include "tools/gpu/YUVUtils.h" |
| |
| namespace skiagm { |
| class ImageFromYUVTextures : public GM { |
| public: |
| ImageFromYUVTextures() { |
| this->setBGColor(0xFFFFFFFF); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("image_from_yuv_textures"); |
| } |
| |
| SkISize onISize() override { return {1420, 610}; } |
| |
| static std::unique_ptr<sk_gpu_test::LazyYUVImage> CreatePlanes(const char* name) { |
| SkBitmap bmp; |
| if (!GetResourceAsBitmap(name, &bmp)) { |
| return {}; |
| } |
| if (bmp.colorType() != kRGBA_8888_SkColorType) { |
| auto info = bmp.info().makeColorType(kRGBA_8888_SkColorType); |
| SkBitmap copy; |
| copy.allocPixels(info); |
| SkAssertResult(bmp.readPixels(copy.pixmap())); |
| bmp = copy; |
| } |
| SkYUVAPixmapInfo pixmapInfo({bmp.dimensions(), |
| SkYUVAInfo::PlaneConfig::kY_U_V_A, |
| SkYUVAInfo::Subsampling::k420, |
| kJPEG_Full_SkYUVColorSpace}, |
| SkYUVAPixmapInfo::DataType::kUnorm8, |
| nullptr); |
| auto pixmaps = SkYUVAPixmaps::Allocate(pixmapInfo); |
| |
| unsigned char* yuvPixels[] = { |
| static_cast<unsigned char*>(pixmaps.planes()[0].writable_addr()), |
| static_cast<unsigned char*>(pixmaps.planes()[1].writable_addr()), |
| static_cast<unsigned char*>(pixmaps.planes()[2].writable_addr()), |
| static_cast<unsigned char*>(pixmaps.planes()[3].writable_addr()), |
| }; |
| |
| float m[20]; |
| SkColorMatrix_RGB2YUV(pixmaps.yuvaInfo().yuvColorSpace(), m); |
| // Here we encode using the kJPEG_SkYUVColorSpace (i.e., full-swing Rec 601) even though |
| // we will draw it with all the supported yuv color spaces when converted back to RGB |
| for (int j = 0; j < pixmaps.planes()[0].height(); ++j) { |
| for (int i = 0; i < pixmaps.planes()[0].width(); ++i) { |
| auto rgba = *bmp.getAddr32(i, j); |
| auto r = (rgba & 0x000000ff) >> 0; |
| auto g = (rgba & 0x0000ff00) >> 8; |
| auto b = (rgba & 0x00ff0000) >> 16; |
| auto a = (rgba & 0xff000000) >> 24; |
| yuvPixels[0][j*pixmaps.planes()[0].width() + i] = SkToU8( |
| sk_float_round2int(m[0]*r + m[1]*g + m[2]*b + m[3]*a + 255*m[4])); |
| yuvPixels[3][j*pixmaps.planes()[0].width() + i] = SkToU8(sk_float_round2int( |
| m[15]*r + m[16]*g + m[17]*b + m[18]*a + 255*m[19])); |
| } |
| } |
| for (int j = 0; j < pixmaps.planes()[1].height(); ++j) { |
| for (int i = 0; i < pixmaps.planes()[1].width(); ++i) { |
| // Average together 4 pixels of RGB. |
| int rgba[] = {0, 0, 0, 0}; |
| int denom = 0; |
| int ylimit = std::min(2*j + 2, pixmaps.planes()[0].height()); |
| int xlimit = std::min(2*i + 2, pixmaps.planes()[0].width()); |
| for (int y = 2*j; y < ylimit; ++y) { |
| for (int x = 2*i; x < xlimit; ++x) { |
| auto src = *bmp.getAddr32(x, y); |
| rgba[0] += (src & 0x000000ff) >> 0; |
| rgba[1] += (src & 0x0000ff00) >> 8; |
| rgba[2] += (src & 0x00ff0000) >> 16; |
| rgba[3] += (src & 0xff000000) >> 24; |
| ++denom; |
| } |
| } |
| for (int c = 0; c < 4; ++c) { |
| rgba[c] /= denom; |
| } |
| int uvIndex = j*pixmaps.planes()[1].width() + i; |
| yuvPixels[1][uvIndex] = SkToU8(sk_float_round2int( |
| m[5]*rgba[0] + m[6]*rgba[1] + m[7]*rgba[2] + m[8]*rgba[3] + 255*m[9])); |
| yuvPixels[2][uvIndex] = SkToU8(sk_float_round2int( |
| m[10]*rgba[0] + m[11]*rgba[1] + m[12]*rgba[2] + m[13]*rgba[3] + 255*m[14])); |
| } |
| } |
| return sk_gpu_test::LazyYUVImage::Make(std::move(pixmaps)); |
| } |
| |
| sk_sp<SkImage> makeYUVAImage(GrDirectContext* context) { |
| return fLazyYUVImage->refImage(context, sk_gpu_test::LazyYUVImage::Type::kFromTextures); |
| } |
| |
| sk_sp<SkImage> createReferenceImage(GrDirectContext* dContext) { |
| auto planarImage = this->makeYUVAImage(dContext); |
| if (!planarImage) { |
| return nullptr; |
| } |
| |
| auto resultInfo = SkImageInfo::Make(fLazyYUVImage->dimensions(), |
| kRGBA_8888_SkColorType, |
| kPremul_SkAlphaType); |
| auto resultSurface = SkSurface::MakeRenderTarget( |
| dContext, skgpu::Budgeted::kYes, resultInfo, 1, kTopLeft_GrSurfaceOrigin, nullptr); |
| if (!resultSurface) { |
| return nullptr; |
| } |
| |
| resultSurface->getCanvas()->drawImage(std::move(planarImage), 0, 0); |
| return resultSurface->makeImageSnapshot(); |
| } |
| |
| DrawResult onGpuSetup(SkCanvas* canvas, SkString* errorMsg) override { |
| auto dContext = GrAsDirectContext(canvas->recordingContext()); |
| if (!dContext || dContext->abandoned()) { |
| *errorMsg = "DirectContext required to create YUV images"; |
| return DrawResult::kSkip; |
| } |
| |
| if (!fLazyYUVImage) { |
| fLazyYUVImage = CreatePlanes("images/mandrill_32.png"); |
| } |
| |
| // We make a version of this image for each draw because, if any draw flattens it to |
| // RGBA, then all subsequent draws would use the RGBA texture. |
| for (int i = 0; i < kNumImages; ++i) { |
| fYUVAImages[i] = this->makeYUVAImage(dContext); |
| if (!fYUVAImages[i]) { |
| *errorMsg = "Couldn't create src YUVA image."; |
| return DrawResult::kFail; |
| } |
| } |
| |
| fReferenceImage = this->createReferenceImage(dContext); |
| if (!fReferenceImage) { |
| *errorMsg = "Couldn't create reference YUVA image."; |
| return DrawResult::kFail; |
| } |
| |
| // Some backends (e.g., Vulkan) require all work be completed for backend textures |
| // before they are deleted. Since we don't know when we'll next have access to a |
| // direct context, flush all the work now. |
| dContext->flush(); |
| dContext->submit(true); |
| |
| return DrawResult::kOk; |
| } |
| |
| void onGpuTeardown() override { |
| for (sk_sp<SkImage>& image : fYUVAImages) { |
| image.reset(); |
| } |
| fReferenceImage.reset(); |
| } |
| |
| SkImage* getYUVAImage(int index) { |
| SkASSERT(index >= 0 && index < kNumImages); |
| return fYUVAImages[index].get(); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| auto draw_image = [canvas](SkImage* image, const SkSamplingOptions& sampling) -> SkSize { |
| if (!image) { |
| return {0, 0}; |
| } |
| canvas->drawImage(image, 0, 0, sampling, nullptr); |
| return {SkIntToScalar(image->width()), SkIntToScalar(image->height())}; |
| }; |
| |
| auto draw_image_rect = [canvas](SkImage* image, |
| const SkSamplingOptions& sampling) -> SkSize { |
| if (!image) { |
| return {0, 0}; |
| } |
| auto subset = SkRect::Make(image->dimensions()); |
| subset.inset(subset.width() * .05f, subset.height() * .1f); |
| auto dst = SkRect::MakeWH(subset.width(), subset.height()); |
| canvas->drawImageRect(image, subset, dst, sampling, nullptr, |
| SkCanvas::kStrict_SrcRectConstraint); |
| return {dst.width(), dst.height()}; |
| }; |
| |
| auto draw_image_shader = [canvas](SkImage* image, |
| const SkSamplingOptions& sampling) -> SkSize { |
| if (!image) { |
| return {0, 0}; |
| } |
| SkMatrix m; |
| m.setRotate(45, image->width()/2.f, image->height()/2.f); |
| SkPaint paint; |
| paint.setShader(image->makeShader(SkTileMode::kMirror, SkTileMode::kDecal, |
| sampling, m)); |
| auto rect = SkRect::MakeWH(image->width() * 1.3f, image->height()); |
| canvas->drawRect(rect, paint); |
| return {rect.width(), rect.height()}; |
| }; |
| |
| canvas->translate(kPad, kPad); |
| int imageIndex = 0; |
| using DrawSig = SkSize(SkImage* image, const SkSamplingOptions&); |
| using DF = std::function<DrawSig>; |
| for (const auto& draw : {DF(draw_image), DF(draw_image_rect), DF(draw_image_shader)}) { |
| for (auto scale : {1.f, 4.f, 0.75f}) { |
| SkScalar h = 0; |
| canvas->save(); |
| for (const auto& sampling : { |
| SkSamplingOptions(SkFilterMode::kNearest), |
| SkSamplingOptions(SkFilterMode::kLinear), |
| SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kNearest), |
| SkSamplingOptions(SkCubicResampler::Mitchell())}) |
| { |
| canvas->save(); |
| canvas->scale(scale, scale); |
| auto s1 = draw(this->getYUVAImage(imageIndex++), sampling); |
| canvas->restore(); |
| canvas->translate(kPad + SkScalarCeilToScalar(scale*s1.width()), 0); |
| canvas->save(); |
| canvas->scale(scale, scale); |
| auto s2 = draw(fReferenceImage.get(), sampling); |
| canvas->restore(); |
| canvas->translate(kPad + SkScalarCeilToScalar(scale*s2.width()), 0); |
| h = std::max({h, s1.height(), s2.height()}); |
| } |
| canvas->restore(); |
| canvas->translate(0, kPad + SkScalarCeilToScalar(scale*h)); |
| } |
| } |
| } |
| |
| private: |
| std::unique_ptr<sk_gpu_test::LazyYUVImage> fLazyYUVImage; |
| |
| // 3 draws x 3 scales x 4 filter qualities |
| inline static constexpr int kNumImages = 3 * 3 * 4; |
| sk_sp<SkImage> fYUVAImages[kNumImages]; |
| sk_sp<SkImage> fReferenceImage; |
| |
| inline static constexpr SkScalar kPad = 10.0f; |
| |
| using INHERITED = GM; |
| }; |
| |
| DEF_GM(return new ImageFromYUVTextures;) |
| } // namespace skiagm |