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