skia2/gm/yuv420_odd_dim.cpp

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/*
* Copyright 2019 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/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkImage.h"
#include "include/core/SkPixmap.h"
#include "include/core/SkSurface.h"
#include "include/core/SkYUVAIndex.h"
#include "include/core/SkYUVASizeInfo.h"
#include "include/encode/SkJpegEncoder.h"
#include "include/gpu/GrRecordingContext.h"
#include "include/utils/SkRandom.h"
#include "src/core/SkCachedData.h"
#include "src/image/SkImage_Base.h"
static constexpr int kScale = 10;
static constexpr SkISize kImageDim = {5, 5};
static sk_sp<SkImage> make_image(GrContext* context) {
// Generate a small jpeg with odd dimensions.
SkBitmap bmp;
bmp.allocPixels(SkImageInfo::Make(kImageDim, kRGBA_8888_SkColorType, kPremul_SkAlphaType));
SkRandom random;
// These random values won't compress well, but it doesn't matter. This test exists to
// compare the GPU YUV code path to the SW.
for (int y = 0; y < bmp.height(); ++y) {
for (int x = 0; x < bmp.width(); ++x) {
*bmp.getAddr32(x, y) = random.nextU() | 0xFF000000;
}
}
bmp.notifyPixelsChanged();
SkImage::MakeFromBitmap(bmp);
SkDynamicMemoryWStream stream;
SkJpegEncoder::Options options;
options.fDownsample = SkJpegEncoder::Downsample::k420;
options.fQuality = 100;
if (!SkJpegEncoder::Encode(&stream, bmp.pixmap(), options)) {
return nullptr;
}
auto image = SkImage::MakeFromEncoded(stream.detachAsData());
if (!context) {
return image;
}
SkYUVASizeInfo info;
SkYUVAIndex indices[4];
SkYUVColorSpace cs;
const void* planes[4];
if (!as_IB(image)->getPlanes(&info, indices, &cs, planes)) {
return nullptr;
}
SkPixmap pixmaps[4];
#ifdef SK_DEBUG
static constexpr SkISize kUVDim = {kImageDim.width() / 2 + 1, kImageDim.height() / 2 + 1};
#endif
SkASSERT(info.fSizes[0] == kImageDim);
SkASSERT(info.fSizes[1] == kUVDim);
SkASSERT(info.fSizes[2] == kUVDim);
for (int i = 0; i < 4; ++i) {
if (!info.fSizes[i].isZero()) {
pixmaps[i].reset(SkImageInfo::MakeA8(info.fSizes[i]), planes[i], info.fWidthBytes[i]);
}
}
return SkImage::MakeFromYUVAPixmaps(context, cs, pixmaps, indices, image->dimensions(),
kTopLeft_GrSurfaceOrigin, false);
}
// This GM tests that the YUVA image code path in the GPU backend handles odd sized images with
// 420 chroma subsampling correctly.
DEF_SIMPLE_GM_CAN_FAIL(yuv420_odd_dim, canvas, errMsg,
kScale* kImageDim.width(), kScale* kImageDim.height()) {
auto image = make_image(canvas->getGrContext());
if (!image) {
if (canvas->recordingContext() && canvas->recordingContext()->abandoned()) {
return skiagm::DrawResult::kOk;
}
return skiagm::DrawResult::kFail;
}
// We draw the image offscreen and then blow it up using nearest filtering by kScale.
// This avoids skbug.com/9693
sk_sp<SkSurface> surface;
if (auto origSurface = canvas->getSurface()) {
surface = origSurface->makeSurface(image->width(), image->height());
} else {
auto ct = canvas->imageInfo().colorType();
if (ct == kUnknown_SkColorType) {
ct = image->colorType();
}
auto info = canvas->imageInfo().makeColorType(ct);
info = info.makeAlphaType(kPremul_SkAlphaType);
surface = SkSurface::MakeRaster(info);
}
surface->getCanvas()->drawImage(image, 0, 0);
canvas->scale(kScale, kScale);
canvas->drawImage(surface->makeImageSnapshot(), 0, 0);
return skiagm::DrawResult::kOk;
}