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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "../third_party/skcms/skcms.h"
#include "SkColorSpacePriv.h"
#include "SkData.h"
#include "SkImage.h"
#include "SkStream.h"
int main(int argc, char** argv) {
const char* image_path = argc > 1 ? argv[1] : nullptr;
if (!image_path) {
SkDebugf("Please pass an image to convert as the first argument to this program.\n");
return 1;
}
sk_sp<SkImage> image = SkImage::MakeFromEncoded(SkData::MakeFromFileName(image_path));
if (!image) {
SkDebugf("Couldn't decode %s as an SkImage.\n", image_path);
return 1;
}
image = image->makeRasterImage();
if (!image) {
SkDebugf("Converting to raster image failed.\n");
return 1;
}
SkPixmap pixmap;
if (!image->peekPixels(&pixmap)) {
SkDebugf("We really should be able to peek raster pixels.\n");
return 1;
}
SkColorSpace* src_cs = image->colorSpace() ? image->colorSpace()
: sk_srgb_singleton();
skcms_ICCProfile src_profile;
src_cs->toProfile(&src_profile);
const char* dst_profile_path = argc > 2 ? argv[2] : nullptr;
skcms_ICCProfile dst_profile = *skcms_sRGB_profile();
if (dst_profile_path) {
sk_sp<SkData> blob = SkData::MakeFromFileName(dst_profile_path);
if (!skcms_Parse(blob->data(), blob->size(), &dst_profile)) {
SkDebugf("Can't parse %s as an ICC profile.\n", dst_profile_path);
return 1;
}
}
skcms_PixelFormat fmt;
switch (pixmap.colorType()) {
case kRGBA_8888_SkColorType: fmt = skcms_PixelFormat_RGBA_8888; break;
case kBGRA_8888_SkColorType: fmt = skcms_PixelFormat_BGRA_8888; break;
default:
SkDebugf("color type %d not yet supported, imgcvt.cpp needs an update.\n",
pixmap.colorType());
return 1;
}
if (pixmap.alphaType() != kPremul_SkAlphaType) {
SkDebugf("not premul, that's weird.\n");
return 1;
}
auto alpha = skcms_AlphaFormat_PremulAsEncoded;
if (pixmap.rowBytes() != (size_t)pixmap.width() * pixmap.info().bytesPerPixel()) {
SkDebugf("not a tight pixmap, need a loop here\n");
return 1;
}
skcms_Transform(pixmap.addr(), fmt,alpha, &src_profile,
pixmap.writable_addr(), fmt,alpha, &dst_profile,
pixmap.width() * pixmap.height());
pixmap.setColorSpace(SkColorSpace::Make(dst_profile));
sk_sp<SkImage> transformed = SkImage::MakeRasterCopy(pixmap);
sk_sp<SkData> png = transformed->encodeToData();
SkFILEWStream("transformed.png").write(png->data(), png->size());
return 0;
}
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