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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 "SkColorSpace_Base.h"
#include "SkData.h"
#include "SkImage.h"
#include "SkImageEncoderPriv.h"
#include "SkJpegEncoder.h"
#include "SkPM4f.h"
#include "SkSRGB.h"
namespace skiagm {
static const int imageWidth = 128;
static const int imageHeight = 128;
static inline int div_round_up(int a, int b) {
return (a + b - 1) / b;
}
sk_sp<SkColorSpace> fix_for_colortype(sk_sp<SkColorSpace> colorSpace, SkColorType colorType) {
if (kRGBA_F16_SkColorType == colorType) {
if (!colorSpace) {
return SkColorSpace::MakeSRGBLinear();
}
return as_CSB(colorSpace)->makeLinearGamma();
}
return colorSpace;
}
static void make_index8(SkBitmap* bitmap, SkAlphaType alphaType, sk_sp<SkColorSpace> colorSpace) {
const SkColor colors[] = {
0x800000FF, 0x8000FF00, 0x80FF0000, 0x80FFFF00,
};
auto toPMColor = [alphaType, colorSpace](SkColor color) {
// In the opaque/unpremul case, just convert to SkPMColor ordering.
if (kPremul_SkAlphaType != alphaType) {
return SkSwizzle_BGRA_to_PMColor(color);
}
// Linear premultiply.
if (colorSpace) {
uint32_t result;
Sk4f pmFloat = SkColor4f::FromColor(color).premul().to4f_pmorder();
SkNx_cast<uint8_t>(sk_linear_to_srgb_needs_trunc(pmFloat)).store(&result);
result = (result & 0x00FFFFFF) | (color & 0xFF000000);
return result;
}
// Legacy premultiply.
return SkPreMultiplyColor(color);
};
// Note that these are not necessarily premultiplied, but they are platform byte ordering.
SkPMColor pmColors[SK_ARRAY_COUNT(colors)];
for (int i = 0; i < (int) SK_ARRAY_COUNT(colors); i++) {
pmColors[i] = toPMColor(colors[i]);
}
SkImageInfo info = SkImageInfo::Make(imageWidth, imageHeight, kIndex_8_SkColorType,
alphaType, colorSpace);
bitmap->allocPixels(info, SkColorTable::Make(pmColors, SK_ARRAY_COUNT(pmColors)));
for (int y = 0; y < imageHeight; y++) {
for (int x = 0; x < imageWidth; x++) {
*bitmap->getAddr8(x, y) = (x / div_round_up(imageWidth, 2)) +
(y / div_round_up(imageHeight, 3));
}
}
}
static void make(SkBitmap* bitmap, SkColorType colorType, SkAlphaType alphaType,
sk_sp<SkColorSpace> colorSpace) {
const char* resource;
switch (colorType) {
case kIndex_8_SkColorType:
make_index8(bitmap, alphaType, colorSpace);
return;
case kGray_8_SkColorType:
resource = "grayscale.jpg";
alphaType = kOpaque_SkAlphaType;
break;
case kRGB_565_SkColorType:
resource = "color_wheel.jpg";
alphaType = kOpaque_SkAlphaType;
break;
default:
resource = (kOpaque_SkAlphaType == alphaType) ? "color_wheel.jpg"
: "color_wheel.png";
break;
}
sk_sp<SkData> data = GetResourceAsData(resource);
std::unique_ptr<SkCodec> codec(SkCodec::NewFromData(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;
SkEncodeOptions options;
if (bitmap.colorSpace()) {
options.fUnpremulBehavior = SkTransferFunctionBehavior::kRespect;
}
switch (format) {
case SkEncodedImageFormat::kPNG:
SkAssertResult(SkEncodeImageAsPNG(&buf, src, options));
break;
case SkEncodedImageFormat::kWEBP:
SkAssertResult(SkEncodeImageAsWEBP(&buf, src, options));
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, kIndex_8_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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