/*
* 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/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTypes.h"
#include "include/gpu/GrBackendSurface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/GrTypes.h"
#include "include/private/SkTo.h"
#include "src/core/SkMathPriv.h"
#include "src/core/SkYUVMath.h"
#include "tools/Resources.h"
#include "tools/gpu/YUVUtils.h"
class GrSurfaceDrawContext;
namespace skiagm {
class ImageFromYUVTextures : public GpuGM {
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,
SkBudgeted::kYes,
resultInfo,
1,
kTopLeft_GrSurfaceOrigin,
nullptr);
if (!resultSurface) {
return nullptr;
}
resultSurface->getCanvas()->drawImage(std::move(planarImage), 0, 0);
return resultSurface->makeImageSnapshot();
}
DrawResult onGpuSetup(GrDirectContext* context, SkString* errorMsg) override {
if (!context || context->abandoned()) {
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(context);
if (!fYUVAImages[i]) {
*errorMsg = "Couldn't create src YUVA image.";
return DrawResult::kFail;
}
}
fReferenceImage = this->createReferenceImage(context);
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.
context->flush();
context->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(GrRecordingContext*, GrSurfaceDrawContext*, 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
static constexpr int kNumImages = 3 * 3 * 4;
sk_sp<SkImage> fYUVAImages[kNumImages];
sk_sp<SkImage> fReferenceImage;
static constexpr SkScalar kPad = 10.0f;
using INHERITED = GM;
};
DEF_GM(return new ImageFromYUVTextures;)
} // namespace skiagm