tests/ICCTest.cpp

/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkTypes.h"

#if defined(SK_USE_SKCMS)

    #include "Resources.h"
    #include "SkColorSpacePriv.h"
    #include "SkICC.h"
    #include "SkString.h"
    #include "Test.h"
    #include "skcms.h"

    DEF_TEST(WriteICCProfile, r) {
        auto adobeRGB = SkColorSpace::MakeRGB(g2Dot2_TransferFn, SkColorSpace::kAdobeRGB_Gamut);

        struct {
            SkColorSpaceTransferFn fn;
            const float*           toXYZD50;
            const char*            desc;
            sk_sp<SkColorSpace>    want;
        } tests[] = {
            {g2Dot2_TransferFn, gAdobeRGB_toXYZD50, "AdobeRGB", adobeRGB},
            { gSRGB_TransferFn,     gSRGB_toXYZD50,     "sRGB", SkColorSpace::MakeSRGB()},
        };

        for (auto test : tests) {
            sk_sp<SkData> profile = SkWriteICCProfile(test.fn, test.toXYZD50);
            REPORTER_ASSERT(r, profile);

            skcms_ICCProfile parsed;
            REPORTER_ASSERT(r, skcms_Parse(profile->data(), profile->size(), &parsed));

            sk_sp<SkColorSpace> got = SkColorSpace::Make(parsed);
            REPORTER_ASSERT(r, got);
            REPORTER_ASSERT(r, SkColorSpace::Equals(got.get(), test.want.get()));

            skcms_ICCTag desc;
            REPORTER_ASSERT(r, skcms_GetTagBySignature(&parsed,
                                                       SkSetFourByteTag('d','e','s','c'),
                                                       &desc));

            // Rather than really carefully break down the 'desc' tag,
            // just check our expected description is somewhere in there (as big-endian UTF-16).
            uint8_t big_endian_utf16[16];
            for (size_t i = 0; i < strlen(test.desc); i++) {
                big_endian_utf16[2*i+0] = 0;
                big_endian_utf16[2*i+1] = test.desc[i];
            }

            SkString haystack((const char*)desc.buf, desc.size),
                     needle  ((const char*)big_endian_utf16, 2*strlen(test.desc));
            REPORTER_ASSERT(r, haystack.contains(needle.c_str()));
        }
    }

    DEF_TEST(AdobeRGB, r) {
        if (sk_sp<SkData> profile = GetResourceAsData("icc_profiles/AdobeRGB1998.icc")) {
            skcms_ICCProfile parsed;
            REPORTER_ASSERT(r, skcms_Parse(profile->data(), profile->size(), &parsed));

            auto got  = SkColorSpace::Make(parsed);
            auto want = SkColorSpace::MakeRGB(g2Dot2_TransferFn, SkColorSpace::kAdobeRGB_Gamut);
            REPORTER_ASSERT(r, SkColorSpace::Equals(got.get(), want.get()));
        }
    }

#endif