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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 "include/core/SkCanvas.h"
- #include "include/core/SkData.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkStream.h"
- #include "include/core/SkSurface.h"
- #include "include/third_party/skcms/skcms.h"
- #include "src/core/SkColorSpacePriv.h"
- static void write_png(const char* path, sk_sp<SkImage> img) {
- sk_sp<SkData> png = img->encodeToData();
- SkFILEWStream(path).write(png->data(), png->size());
- }
- int main(int argc, char** argv) {
- const char* source_path = argc > 1 ? argv[1] : nullptr;
- if (!source_path) {
- SkDebugf("Please pass an image or profile to convert"
- " as the first argument to this program.\n");
- return 1;
- }
- const char* dst_profile_path = argc > 2 ? argv[2] : nullptr;
- skcms_ICCProfile dst_profile = *skcms_sRGB_profile();
- sk_sp<SkData> dst_blob;
- if (dst_profile_path) {
- dst_blob = SkData::MakeFromFileName(dst_profile_path);
- if (!skcms_Parse(dst_blob->data(), dst_blob->size(), &dst_profile)) {
- SkDebugf("Can't parse %s as an ICC profile.\n", dst_profile_path);
- return 1;
- }
- }
- auto blob = SkData::MakeFromFileName(source_path);
- skcms_ICCProfile src_profile;
- if (skcms_Parse(blob->data(), blob->size(), &src_profile)) {
- // Transform white, black, primaries, and primary complements.
- float src[] = {
- 0,0,0,
- 1,1,1,
- 1,0,0,
- 0,1,0,
- 0,0,1,
- 0,1,1,
- 1,0,1,
- 1,1,0,
- };
- float dst[24] = {0};
- if (!skcms_Transform(
- src, skcms_PixelFormat_RGB_fff, skcms_AlphaFormat_Unpremul, &src_profile,
- dst, skcms_PixelFormat_RGB_fff, skcms_AlphaFormat_Unpremul, &dst_profile,
- 8)) {
- SkDebugf("Cannot transform.\n");
- return 1;
- }
- for (int i = 0; i < 8; i++) {
- SkDebugf("(%g, %g, %g) --> (%+.4f, %+.4f, %+.4f)\n",
- src[3*i+0], src[3*i+1], src[3*i+2],
- dst[3*i+0], dst[3*i+1], dst[3*i+2]);
- }
- return 0;
- }
- sk_sp<SkImage> image = SkImage::MakeFromEncoded(blob);
- if (!image) {
- SkDebugf("Couldn't decode %s as an SkImage or an ICC profile.\n", source_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;
- }
- sk_sp<SkColorSpace> dst_cs = SkColorSpace::Make(dst_profile);
- if (!dst_cs) {
- SkDebugf("We can't convert to this destination profile as-is. Coercing it.\n");
- if (skcms_MakeUsableAsDestinationWithSingleCurve(&dst_profile)) {
- dst_cs = SkColorSpace::Make(dst_profile);
- }
- if (!dst_cs) {
- SkDebugf("We can't convert to this destination profile at all.\n");
- return 1;
- }
- }
- { // transform with skcms
- SkColorSpace* src_cs = image->colorSpace() ? image->colorSpace()
- : sk_srgb_singleton();
- src_cs->toProfile(&src_profile);
- 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() == kUnpremul_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;
- }
- if (!skcms_Transform(pixmap.addr(), fmt,alpha, &src_profile,
- pixmap.writable_addr(), fmt,alpha, &dst_profile,
- pixmap.width() * pixmap.height())) {
- SkDebugf("skcms_Transform() failed\n");
- return 1;
- }
- pixmap.setColorSpace(dst_cs);
- write_png("transformed-skcms.png", SkImage::MakeRasterCopy(pixmap));
- }
- { // transform with writePixels()
- sk_sp<SkSurface> surface = SkSurface::MakeRaster(pixmap.info().makeColorSpace(dst_cs));
- if (!surface) {
- SkDebugf("couldn't create a surface\n");
- return 1;
- }
- surface->writePixels(pixmap, 0,0);
- write_png("transformed-writepixels.png", surface->makeImageSnapshot());
- }
- { // transform by drawing
- sk_sp<SkSurface> surface = SkSurface::MakeRaster(pixmap.info().makeColorSpace(dst_cs));
- if (!surface) {
- SkDebugf("couldn't create a surface\n");
- return 1;
- }
- surface->getCanvas()->drawImage(image, 0,0);
- write_png("transformed-draw.png", surface->makeImageSnapshot());
- }
- return 0;
- }
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