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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "Resources.h"
#include "SkCanvas.h"
#include "SkCodec.h"
#include "SkData.h"
#include "SkImage.h"
#include "SkImageEncoderPriv.h"
#include "SkJpegEncoder.h"
#include "SkPngEncoder.h"
#include "SkPM4f.h"
#include "SkSRGB.h"
#include "SkWebpEncoder.h"
namespace skiagm {
static const int imageWidth = 128;
static const int imageHeight = 128;
sk_sp<SkColorSpace> fix_for_colortype(sk_sp<SkColorSpace> colorSpace, SkColorType colorType) {
if (kRGBA_F16_SkColorType == colorType) {
if (!colorSpace) {
return SkColorSpace::MakeSRGBLinear();
}
return colorSpace->makeLinearGamma();
}
return colorSpace;
}
static void make(SkBitmap* bitmap, SkColorType colorType, SkAlphaType alphaType,
sk_sp<SkColorSpace> colorSpace) {
const char* resource;
switch (colorType) {
case kGray_8_SkColorType:
resource = "images/grayscale.jpg";
alphaType = kOpaque_SkAlphaType;
break;
case kRGB_565_SkColorType:
resource = "images/color_wheel.jpg";
alphaType = kOpaque_SkAlphaType;
break;
default:
resource = (kOpaque_SkAlphaType == alphaType) ? "images/color_wheel.jpg"
: "images/color_wheel.png";
break;
}
sk_sp<SkData> data = GetResourceAsData(resource);
std::unique_ptr<SkCodec> codec = SkCodec::MakeFromData(data);
SkImageInfo dstInfo = codec->getInfo().makeColorType(colorType)
.makeAlphaType(alphaType)
.makeColorSpace(fix_for_colortype(colorSpace, colorType));
bitmap->allocPixels(dstInfo);
codec->getPixels(dstInfo, bitmap->getPixels(), bitmap->rowBytes());
}
static sk_sp<SkData> encode_data(const SkBitmap& bitmap, SkEncodedImageFormat format) {
SkPixmap src;
if (!bitmap.peekPixels(&src)) {
return nullptr;
}
SkDynamicMemoryWStream buf;
SkPngEncoder::Options pngOptions;
SkWebpEncoder::Options webpOptions;
SkTransferFunctionBehavior behavior = bitmap.colorSpace()
? SkTransferFunctionBehavior::kRespect : SkTransferFunctionBehavior::kIgnore;
pngOptions.fUnpremulBehavior = behavior;
webpOptions.fUnpremulBehavior = behavior;
switch (format) {
case SkEncodedImageFormat::kPNG:
SkAssertResult(SkPngEncoder::Encode(&buf, src, pngOptions));
break;
case SkEncodedImageFormat::kWEBP:
SkAssertResult(SkWebpEncoder::Encode(&buf, src, webpOptions));
break;
case SkEncodedImageFormat::kJPEG:
SkAssertResult(SkJpegEncoder::Encode(&buf, src, SkJpegEncoder::Options()));
break;
default:
break;
}
return buf.detachAsData();
}
class EncodeSRGBGM : public GM {
public:
EncodeSRGBGM(SkEncodedImageFormat format)
: fEncodedFormat(format)
{}
protected:
SkString onShortName() override {
const char* format = nullptr;
switch (fEncodedFormat) {
case SkEncodedImageFormat::kPNG:
format = "png";
break;
case SkEncodedImageFormat::kWEBP:
format = "webp";
break;
case SkEncodedImageFormat::kJPEG:
format = "jpg";
break;
default:
break;
}
return SkStringPrintf("encode-srgb-%s", format);
}
SkISize onISize() override {
return SkISize::Make(imageWidth * 2, imageHeight * 15);
}
void onDraw(SkCanvas* canvas) override {
const SkColorType colorTypes[] = {
kN32_SkColorType, kRGBA_F16_SkColorType, kGray_8_SkColorType, kRGB_565_SkColorType,
};
const SkAlphaType alphaTypes[] = {
kUnpremul_SkAlphaType, kPremul_SkAlphaType, kOpaque_SkAlphaType,
};
const sk_sp<SkColorSpace> colorSpaces[] = {
nullptr, SkColorSpace::MakeSRGB(),
};
SkBitmap bitmap;
for (SkColorType colorType : colorTypes) {
for (SkAlphaType alphaType : alphaTypes) {
canvas->save();
for (sk_sp<SkColorSpace> colorSpace : colorSpaces) {
make(&bitmap, colorType, alphaType, colorSpace);
auto image = SkImage::MakeFromEncoded(encode_data(bitmap, fEncodedFormat));
canvas->drawImage(image.get(), 0.0f, 0.0f);
canvas->translate((float) imageWidth, 0.0f);
}
canvas->restore();
canvas->translate(0.0f, (float) imageHeight);
}
}
}
private:
SkEncodedImageFormat fEncodedFormat;
typedef GM INHERITED;
};
DEF_GM( return new EncodeSRGBGM(SkEncodedImageFormat::kPNG); )
DEF_GM( return new EncodeSRGBGM(SkEncodedImageFormat::kWEBP); )
DEF_GM( return new EncodeSRGBGM(SkEncodedImageFormat::kJPEG); )
}
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