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skia2/gm/imagefromyuvtextures.cpp
John Stiles a6841be235 Enable ClangTidy check llvm-namespace-comment. 
This fixes a large number of SkSL namespaces which were labeled as if
they were anonymous, and also a handful of other mislabeled namespaces.
Missing namespace-end comments have been added throughout.
A number of diffs are just indentation-related (adjusting 1- or 3-
space indents to 2-space).

Change-Id: I6c62052a0d3aea4ae12ca07e0c2a8587b2fce4ec
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/308503
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2020-08-06 19:07:52 +00:00

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/*
* 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/SkTypes.h"
#include "include/core/SkYUVAIndex.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"
using sk_gpu_test::YUVABackendReleaseContext;
class GrRenderTargetContext;
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 SkBitmap CreateBmpAndPlanes(const char* name, SkBitmap yuvaBmps[4]) {
SkBitmap bmp;
if (!GetResourceAsBitmap(name, &bmp)) {
return {};
}
auto ii = SkImageInfo::Make(bmp.dimensions(), kRGBA_8888_SkColorType, kPremul_SkAlphaType);
SkBitmap rgbaBmp;
rgbaBmp.allocPixels(ii);
bmp.readPixels(rgbaBmp.pixmap(), 0, 0);
SkImageInfo yaInfo = SkImageInfo::Make(rgbaBmp.dimensions(), kAlpha_8_SkColorType,
kUnpremul_SkAlphaType);
yuvaBmps[0].allocPixels(yaInfo);
SkISize uvSize = {rgbaBmp.width()/2, rgbaBmp.height()/2};
SkImageInfo uvInfo = SkImageInfo::Make(uvSize, kAlpha_8_SkColorType, kUnpremul_SkAlphaType);
yuvaBmps[1].allocPixels(uvInfo);
yuvaBmps[2].allocPixels(uvInfo);
yuvaBmps[3].allocPixels(yaInfo);
unsigned char* yuvPixels[] = {
static_cast<unsigned char*>(yuvaBmps[0].getPixels()),
static_cast<unsigned char*>(yuvaBmps[1].getPixels()),
static_cast<unsigned char*>(yuvaBmps[2].getPixels()),
static_cast<unsigned char*>(yuvaBmps[3].getPixels()),
};
float m[20];
SkColorMatrix_RGB2YUV(kJPEG_SkYUVColorSpace, 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 < yaInfo.height(); ++j) {
for (int i = 0; i < yaInfo.width(); ++i) {
auto rgba = *rgbaBmp.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*yaInfo.width() + i] = SkToU8(
sk_float_round2int(m[0]*r + m[1]*g + m[2]*b + m[3]*a + 255*m[4]));
yuvPixels[3][j*yaInfo.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 < uvInfo.height(); ++j) {
for (int i = 0; i < uvInfo.width(); ++i) {
// Average together 4 pixels of RGB.
int rgba[] = {0, 0, 0, 0};
for (int y = 0; y < 2; ++y) {
for (int x = 0; x < 2; ++x) {
auto src = *rgbaBmp.getAddr32(2 * i + x, 2 * j + y);
rgba[0] += (src & 0x000000ff) >> 0;
rgba[1] += (src & 0x0000ff00) >> 8;
rgba[2] += (src & 0x00ff0000) >> 16;
rgba[3] += (src & 0xff000000) >> 24;
}
}
for (int c = 0; c < 4; ++c) {
rgba[c] /= 4;
}
int uvIndex = j*uvInfo.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 rgbaBmp;
}
static bool CreateYUVBackendTextures(GrDirectContext* context, SkBitmap bmps[4],
SkYUVAIndex indices[4],
YUVABackendReleaseContext* beContext) {
for (int i = 0; i < 4; ++i) {
GrBackendTexture tmp = context->createBackendTexture(
bmps[i].pixmap(), GrRenderable::kNo, GrProtected::kNo,
YUVABackendReleaseContext::CreationCompleteProc(i),
beContext);
if (!tmp.isValid()) {
return false;
}
beContext->set(i, tmp);
}
for (int i = 0; i < 4; ++i) {
auto chanMask = beContext->beTexture(i).getBackendFormat().channelMask();
// We expect the single channel bitmaps to produce single channel textures.
SkASSERT(chanMask && SkIsPow2(chanMask));
if (chanMask & kGray_SkColorChannelFlag) {
indices[i].fChannel = SkColorChannel::kR;
} else {
indices[i].fChannel = static_cast<SkColorChannel>(31 - SkCLZ(chanMask));
}
indices[i].fIndex = i;
}
return true;
}
sk_sp<SkImage> makeYUVAImage(GrDirectContext* context) {
auto releaseContext = new YUVABackendReleaseContext(context);
SkYUVAIndex indices[4];
if (!CreateYUVBackendTextures(context, fYUVABmps, indices, releaseContext)) {
YUVABackendReleaseContext::Unwind(context, releaseContext, false);
return nullptr;
}
return SkImage::MakeFromYUVATextures(context,
kJPEG_SkYUVColorSpace,
releaseContext->beTextures(),
indices,
fRGBABmp.dimensions(),
kTopLeft_GrSurfaceOrigin,
nullptr,
YUVABackendReleaseContext::Release,
releaseContext);
}
sk_sp<SkImage> createReferenceImage(GrDirectContext* dContext) {
auto planeReleaseContext = new YUVABackendReleaseContext(dContext);
SkYUVAIndex indices[4];
if (!CreateYUVBackendTextures(dContext, fYUVABmps, indices, planeReleaseContext)) {
YUVABackendReleaseContext::Unwind(dContext, planeReleaseContext, false);
return nullptr;
}
auto rgbaReleaseContext = new YUVABackendReleaseContext(dContext);
GrBackendTexture resultTexture = dContext->createBackendTexture(
fRGBABmp.dimensions().width(), fRGBABmp.dimensions().height(),
kRGBA_8888_SkColorType, SkColors::kTransparent,
GrMipmapped::kNo, GrRenderable::kYes, GrProtected::kNo,
YUVABackendReleaseContext::CreationCompleteProc(0),
rgbaReleaseContext);
if (!resultTexture.isValid()) {
YUVABackendReleaseContext::Unwind(dContext, planeReleaseContext, false);
YUVABackendReleaseContext::Unwind(dContext, rgbaReleaseContext, false);
return nullptr;
}
rgbaReleaseContext->set(0, resultTexture);
auto tmp = SkImage::MakeFromYUVATexturesCopyWithExternalBackend(
dContext,
kJPEG_SkYUVColorSpace,
planeReleaseContext->beTextures(),
indices,
fRGBABmp.dimensions(),
kTopLeft_GrSurfaceOrigin,
resultTexture,
nullptr,
YUVABackendReleaseContext::Release,
rgbaReleaseContext);
YUVABackendReleaseContext::Unwind(dContext, planeReleaseContext, true);
return tmp;
}
DrawResult onGpuSetup(GrDirectContext* context, SkString* errorMsg) override {
if (!context || context->abandoned()) {
return DrawResult::kSkip;
}
fRGBABmp = CreateBmpAndPlanes("images/mandrill_32.png", fYUVABmps);
// 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*, GrRenderTargetContext*, SkCanvas* canvas) override {
auto draw_image = [canvas](SkImage* image, SkFilterQuality fq) -> SkSize {
if (!image) {
return {0, 0};
}
SkPaint paint;
paint.setFilterQuality(fq);
canvas->drawImage(image, 0, 0, &paint);
return {SkIntToScalar(image->width()), SkIntToScalar(image->height())};
};
auto draw_image_rect = [canvas](SkImage* image, SkFilterQuality fq) -> SkSize {
if (!image) {
return {0, 0};
}
SkPaint paint;
paint.setFilterQuality(fq);
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, &paint);
return {dst.width(), dst.height()};
};
auto draw_image_shader = [canvas](SkImage* image, SkFilterQuality fq) -> SkSize {
if (!image) {
return {0, 0};
}
SkMatrix m;
m.setRotate(45, image->width()/2.f, image->height()/2.f);
auto shader = image->makeShader(SkTileMode::kMirror, SkTileMode::kDecal, m);
SkPaint paint;
paint.setFilterQuality(fq);
paint.setShader(std::move(shader));
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, SkFilterQuality fq);
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 (auto fq : {kNone_SkFilterQuality, kLow_SkFilterQuality,
kMedium_SkFilterQuality, kHigh_SkFilterQuality}) {
canvas->save();
canvas->scale(scale, scale);
auto s1 = draw(this->getYUVAImage(imageIndex++), fq);
canvas->restore();
canvas->translate(kPad + SkScalarCeilToScalar(scale*s1.width()), 0);
canvas->save();
canvas->scale(scale, scale);
auto s2 = draw(fReferenceImage.get(), fq);
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:
SkBitmap fRGBABmp; // TODO: oddly, it looks like this could just be an SkISize
SkBitmap fYUVABmps[4];
// 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;
typedef GM INHERITED;
};
DEF_GM(return new ImageFromYUVTextures;)
} // namespace skiagm
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