/* * 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 img) { sk_sp 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 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 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 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 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 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; }