06a215b768
E.g. out/imgcvt /System/Library/ColorSync/Profiles/ITU-2020.icc ~/skcms/profiles/mobile/sRGB_parametric.icc (0, 0, 0) --> (+0.0000, +0.0000, +0.0000) (1, 1, 1) --> (+0.9998, +0.9998, +0.9998) (1, 0, 0) --> (+1.2481, -0.3879, -0.1435) (0, 1, 0) --> (-0.7903, +1.0561, -0.3501) (0, 0, 1) --> (-0.2992, -0.0886, +1.0503) (0, 1, 1) --> (-0.8325, +1.0527, +1.0077) (1, 0, 1) --> (+1.2239, -0.4000, +1.0428) (1, 1, 0) --> (+1.0312, +1.0035, -0.3791) Change-Id: Ieb38a3b519f00ae56491c3265ed9725888b692e9 Reviewed-on: https://skia-review.googlesource.com/152360 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Mike Klein <mtklein@google.com>
121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
/*
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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* source_path = argc > 1 ? argv[1] : nullptr;
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if (!source_path) {
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SkDebugf("Please pass an image or profile to convert"
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" as the first argument to this program.\n");
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return 1;
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}
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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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auto blob = SkData::MakeFromFileName(source_path);
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skcms_ICCProfile src_profile;
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if (skcms_Parse(blob->data(), blob->size(), &src_profile)) {
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// Transform white, black, primaries, and primary complements.
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float src[] = {
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0,0,0,
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1,1,1,
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1,0,0,
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0,1,0,
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0,0,1,
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0,1,1,
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1,0,1,
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1,1,0,
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};
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float dst[24] = {0};
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if (!skcms_Transform(
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src, skcms_PixelFormat_RGB_fff, skcms_AlphaFormat_Unpremul, &src_profile,
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dst, skcms_PixelFormat_RGB_fff, skcms_AlphaFormat_Unpremul, &dst_profile,
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8)) {
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SkDebugf("Cannot transform.\n");
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return 1;
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}
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for (int i = 0; i < 8; i++) {
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SkDebugf("(%g, %g, %g) --> (%+.4f, %+.4f, %+.4f)\n",
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src[3*i+0], src[3*i+1], src[3*i+2],
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dst[3*i+0], dst[3*i+1], dst[3*i+2]);
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}
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return 0;
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}
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sk_sp<SkImage> image = SkImage::MakeFromEncoded(blob);
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if (!image) {
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SkDebugf("Couldn't decode %s as an SkImage or an ICC profile.\n", source_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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src_cs->toProfile(&src_profile);
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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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