skia2/gm/encode-alpha-jpeg.cpp
Ben Wagner 7fde8e1728 IWYU for gms.
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

112 lines
4.1 KiB
C++

/*
* Copyright 2017 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/SkColorSpace.h"
#include "include/core/SkData.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPixmap.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSize.h"
#include "include/core/SkStream.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/encode/SkJpegEncoder.h"
#include "include/private/SkTemplates.h"
#include "tools/Resources.h"
namespace skiagm {
static inline void read_into_pixmap(SkPixmap* dst, SkImageInfo dstInfo, void* dstPixels,
sk_sp<SkImage> src) {
dst->reset(dstInfo, dstPixels, dstInfo.minRowBytes());
src->readPixels(*dst, 0, 0, SkImage::CachingHint::kDisallow_CachingHint);
}
static inline sk_sp<SkImage> encode_pixmap_and_make_image(const SkPixmap& src,
SkJpegEncoder::AlphaOption alphaOption) {
SkDynamicMemoryWStream dst;
SkJpegEncoder::Options options;
options.fAlphaOption = alphaOption;
SkJpegEncoder::Encode(&dst, src, options);
return SkImage::MakeFromEncoded(dst.detachAsData());
}
class EncodeJpegAlphaOptsGM : public GM {
public:
EncodeJpegAlphaOptsGM() {}
protected:
SkString onShortName() override {
return SkString("encode-alpha-jpeg");
}
SkISize onISize() override {
return SkISize::Make(400, 200);
}
DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
sk_sp<SkImage> srcImg = GetResourceAsImage("images/rainbow-gradient.png");
if (!srcImg) {
*errorMsg = "Could not load images/rainbow-gradient.png. "
"Did you forget to set the resourcePath?";
return DrawResult::kFail;
}
fStorage.reset(srcImg->width() * srcImg->height() *
SkColorTypeBytesPerPixel(kRGBA_F16_SkColorType));
SkPixmap src;
SkImageInfo info = SkImageInfo::MakeN32Premul(srcImg->width(), srcImg->height(),
canvas->imageInfo().colorSpace() ? SkColorSpace::MakeSRGB() : nullptr);
read_into_pixmap(&src, info, fStorage.get(), srcImg);
// Encode 8888 premul.
auto img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore);
auto img1 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kBlendOnBlack);
canvas->drawImage(img0, 0.0f, 0.0f);
canvas->drawImage(img1, 0.0f, 100.0f);
// Encode 8888 unpremul
info = info.makeAlphaType(kUnpremul_SkAlphaType);
read_into_pixmap(&src, info, fStorage.get(), srcImg);
img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore);
img1 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kBlendOnBlack);
canvas->drawImage(img0, 100.0f, 0.0f);
canvas->drawImage(img1, 100.0f, 100.0f);
// Encode F16 premul
info = SkImageInfo::Make(srcImg->width(), srcImg->height(), kRGBA_F16_SkColorType,
kPremul_SkAlphaType, SkColorSpace::MakeSRGB());
read_into_pixmap(&src, info, fStorage.get(), srcImg);
img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore);
img1 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kBlendOnBlack);
canvas->drawImage(img0, 200.0f, 0.0f);
canvas->drawImage(img1, 200.0f, 100.0f);
// Encode F16 unpremul
info = info.makeAlphaType(kUnpremul_SkAlphaType);
read_into_pixmap(&src, info, fStorage.get(), srcImg);
img0 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kIgnore);
img1 = encode_pixmap_and_make_image(src, SkJpegEncoder::AlphaOption::kBlendOnBlack);
canvas->drawImage(img0, 300.0f, 0.0f);
canvas->drawImage(img1, 300.0f, 100.0f);
return DrawResult::kOk;
}
private:
SkAutoTMalloc<uint8_t> fStorage;
typedef GM INHERITED;
};
DEF_GM( return new EncodeJpegAlphaOptsGM; )
};