c465d13e6f
Should make it easier to ask just for images. Change-Id: If821743dc924c4bfbc6b2b2d29b14affde7b3afd Reviewed-on: https://skia-review.googlesource.com/82684 Commit-Queue: Hal Canary <halcanary@google.com> Reviewed-by: Leon Scroggins <scroggo@google.com>
71 lines
2.3 KiB
C++
71 lines
2.3 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 "SkColorSpacePriv.h"
|
|
#include "SkImage.h"
|
|
#include "SkPngEncoder.h"
|
|
|
|
#include "Resources.h"
|
|
|
|
/**
|
|
* Create a color space that swaps the red, green, and blue channels.
|
|
*/
|
|
static sk_sp<SkColorSpace> gbr_color_space() {
|
|
return as_CSB(SkColorSpace::MakeSRGB())->makeColorSpin();
|
|
}
|
|
|
|
/**
|
|
* Create a color space with a steep transfer function.
|
|
*/
|
|
static sk_sp<SkColorSpace> tf_color_space() {
|
|
SkColorSpaceTransferFn fn;
|
|
fn.fA = 1.f; fn.fB = 0.f; fn.fC = 0.f; fn.fD = 0.f; fn.fE = 0.f; fn.fF = 0.f; fn.fG = 50.f;
|
|
return SkColorSpace::MakeRGB(fn, SkColorSpace::kSRGB_Gamut);
|
|
}
|
|
|
|
/**
|
|
* Create a wide gamut color space.
|
|
*/
|
|
static sk_sp<SkColorSpace> wide_gamut_color_space() {
|
|
return SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
|
|
SkColorSpace::kRec2020_Gamut);
|
|
}
|
|
|
|
int main(int argc, char** argv) {
|
|
sk_sp<SkImage> image = GetResourceAsImage("images/flutter_logo.jpg");
|
|
if (!image) {
|
|
SkDebugf("Cannot find flutter_logo.jpg in resources.\n");
|
|
return 1;
|
|
}
|
|
|
|
// Encode an image with a gbr color space.
|
|
SkImageInfo info = SkImageInfo::MakeN32(image->width(), image->height(), kOpaque_SkAlphaType,
|
|
gbr_color_space());
|
|
size_t rowBytes = info.minRowBytes();
|
|
SkAutoTMalloc<uint8_t> storage(rowBytes * image->height());
|
|
SkPixmap src(info, storage.get(), rowBytes);
|
|
image->readPixels(src, 0, 0, SkImage::kDisallow_CachingHint);
|
|
SkFILEWStream dst0("gbr.png");
|
|
SkPngEncoder::Options opts;
|
|
opts.fUnpremulBehavior = SkTransferFunctionBehavior::kIgnore; // Does not matter for opaque src
|
|
SkAssertResult(SkPngEncoder::Encode(&dst0, src, opts));
|
|
|
|
// Encode an image with steep transfer function.
|
|
src.setColorSpace(tf_color_space());
|
|
image->readPixels(src, 0, 0, SkImage::kDisallow_CachingHint);
|
|
SkFILEWStream dst1("tf.png");
|
|
SkAssertResult(SkPngEncoder::Encode(&dst1, src, opts));
|
|
|
|
// Encode a wide gamut image.
|
|
src.setColorSpace(wide_gamut_color_space());
|
|
image->readPixels(src, 0, 0, SkImage::kDisallow_CachingHint);
|
|
SkFILEWStream dst2("wide-gamut.png");
|
|
SkAssertResult(SkPngEncoder::Encode(&dst2, src, opts));
|
|
|
|
return 0;
|
|
}
|