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Diffstat (limited to 'src/gui/painting/qicc.cpp')
| -rw-r--r-- | src/gui/painting/qicc.cpp | 776 |
1 files changed, 776 insertions, 0 deletions
diff --git a/src/gui/painting/qicc.cpp b/src/gui/painting/qicc.cpp new file mode 100644 index 0000000000..18f212f8e9 --- /dev/null +++ b/src/gui/painting/qicc.cpp @@ -0,0 +1,776 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qicc_p.h" + +#include <qbuffer.h> +#include <qbytearray.h> +#include <qdatastream.h> +#include <qendian.h> +#include <qloggingcategory.h> +#include <qstring.h> + +#include "qcolorspace_p.h" +#include "qcolortrc_p.h" + +QT_BEGIN_NAMESPACE +Q_LOGGING_CATEGORY(lcIcc, "qt.gui.icc") + +struct ICCProfileHeader +{ + quint32_be profileSize; + + quint32_be preferredCmmType; + + quint32_be profileVersion; + quint32_be profileClass; + quint32_be inputColorSpace; + quint32_be pcs; + quint32_be datetime[3]; + quint32_be signature; + quint32_be platformSignature; + quint32_be flags; + quint32_be deviceManufacturer; + quint32_be deviceModel; + quint32_be deviceAttributes[2]; + + quint32_be renderingIntent; + qint32_be illuminantXyz[3]; + + quint32_be creatorSignature; + quint32_be profileId[4]; + + quint32_be reserved[7]; + +// Technically after the header, but easier to include here: + quint32_be tagCount; +}; + +constexpr quint32 IccTag(uchar a, uchar b, uchar c, uchar d) +{ + return (a << 24) | (b << 16) | (c << 8) | d; +} + +enum class ProfileClass : quint32 { + Input = IccTag('s', 'c', 'r', 'n'), + Display = IccTag('m', 'n', 't', 'r'), + // Not supported: + Output = IccTag('p', 'r', 't', 'r'), + ColorSpace = IccTag('s', 'p', 'a', 'c'), +}; + +enum class Tag : quint32 { + acsp = IccTag('a', 'c', 's', 'p'), + RGB_ = IccTag('R', 'G', 'B', ' '), + XYZ_ = IccTag('X', 'Y', 'Z', ' '), + rXYZ = IccTag('r', 'X', 'Y', 'Z'), + gXYZ = IccTag('g', 'X', 'Y', 'Z'), + bXYZ = IccTag('b', 'X', 'Y', 'Z'), + rTRC = IccTag('r', 'T', 'R', 'C'), + gTRC = IccTag('g', 'T', 'R', 'C'), + bTRC = IccTag('b', 'T', 'R', 'C'), + A2B0 = IccTag('A', '2', 'B', '0'), + A2B1 = IccTag('A', '2', 'B', '1'), + B2A0 = IccTag('B', '2', 'A', '0'), + B2A1 = IccTag('B', '2', 'A', '1'), + desc = IccTag('d', 'e', 's', 'c'), + text = IccTag('t', 'e', 'x', 't'), + cprt = IccTag('c', 'p', 'r', 't'), + curv = IccTag('c', 'u', 'r', 'v'), + para = IccTag('p', 'a', 'r', 'a'), + wtpt = IccTag('w', 't', 'p', 't'), + bkpt = IccTag('b', 'k', 'p', 't'), + mft1 = IccTag('m', 'f', 't', '1'), + mft2 = IccTag('m', 'f', 't', '2'), + mluc = IccTag('m', 'l', 'u', 'c'), + mAB_ = IccTag('m', 'A', 'B', ' '), + mBA_ = IccTag('m', 'B', 'A', ' '), + chad = IccTag('c', 'h', 'a', 'd'), + sf32 = IccTag('s', 'f', '3', '2'), + + // Apple extensions for ICCv2: + aarg = IccTag('a', 'a', 'r', 'g'), + aagg = IccTag('a', 'a', 'g', 'g'), + aabg = IccTag('a', 'a', 'b', 'g'), +}; + +inline uint qHash(const Tag &key, uint seed = 0) +{ + return qHash(quint32(key), seed); +} + +namespace QIcc { + +struct TagTableEntry +{ + quint32_be signature; + quint32_be offset; + quint32_be size; +}; + +struct GenericTagData { + quint32_be type; + quint32_be null; +}; + +struct XYZTagData : GenericTagData { + qint32_be fixedX; + qint32_be fixedY; + qint32_be fixedZ; +}; + +struct CurvTagData : GenericTagData { + quint32_be valueCount; + quint16_be value[1]; +}; + +struct ParaTagData : GenericTagData { + quint16_be curveType; + quint16_be null2; + quint32_be parameter[1]; +}; + +struct DescTagData : GenericTagData { + quint32_be asciiDescriptionLength; + char asciiDescription[1]; + // .. we ignore the rest +}; + +struct MlucTagRecord { + quint16_be languageCode; + quint16_be countryCode; + quint32_be size; + quint32_be offset; +}; + +struct MlucTagData : GenericTagData { + quint32_be recordCount; + quint32_be recordSize; // = sizeof(MlucTagRecord) + MlucTagRecord records[1]; +}; + +// For both mAB and mBA +struct mABTagData : GenericTagData { + quint8 inputChannels; + quint8 outputChannels; + quint8 padding[2]; + quint32_be bCurvesOffset; + quint32_be matrixOffset; + quint32_be mCurvesOffset; + quint32_be clutOffset; + quint32_be aCurvesOffset; +}; + +struct Sf32TagData : GenericTagData { + quint32_be value[1]; +}; + +static int toFixedS1516(float x) +{ + return int(x * 65536.0f + 0.5f); +} + +static float fromFixedS1516(int x) +{ + return x * (1.0f / 65536.0f); +} + +static bool isValidIccProfile(const ICCProfileHeader &header) +{ + if (header.signature != uint(Tag::acsp)) { + qCWarning(lcIcc, "Failed ICC signature test"); + return false; + } + + // Don't overflow 32bit integers: + if (header.tagCount >= INT32_MAX / sizeof(TagTableEntry)) + return false; + if (header.profileSize - sizeof(ICCProfileHeader) < header.tagCount * sizeof(TagTableEntry)) { + qCWarning(lcIcc, "Failed basic size sanity"); + return false; + } + + if (header.profileClass != uint(ProfileClass::Input) + && header.profileClass != uint(ProfileClass::Display)) { + qCWarning(lcIcc, "Unsupported ICC profile class %x", quint32(header.profileClass)); + return false; + } + if (header.inputColorSpace != 0x52474220 /* 'RGB '*/) { + qCWarning(lcIcc, "Unsupported ICC input color space %x", quint32(header.inputColorSpace)); + return false; + } + if (header.pcs != 0x58595a20 /* 'XYZ '*/) { + // ### support PCSLAB + qCWarning(lcIcc, "Unsupported ICC profile connection space %x", quint32(header.pcs)); + return false; + } + + QColorVector illuminant; + illuminant.x = fromFixedS1516(header.illuminantXyz[0]); + illuminant.y = fromFixedS1516(header.illuminantXyz[1]); + illuminant.z = fromFixedS1516(header.illuminantXyz[2]); + if (illuminant != QColorVector::D50()) { + qCWarning(lcIcc, "Invalid ICC illuminant"); + return false; + } + + return true; +} + +static int writeColorTrc(QDataStream &stream, const QColorTrc &trc) +{ + if (trc.isLinear()) { + stream << uint(Tag::curv) << uint(0); + stream << uint(0); + return 12; + } + + if (trc.m_type == QColorTrc::Type::Function) { + const QColorTransferFunction &fun = trc.m_fun; + stream << uint(Tag::para) << uint(0); + if (fun.isGamma()) { + stream << ushort(0) << ushort(0); + stream << toFixedS1516(fun.m_g); + return 12 + 4; + } + bool type3 = qFuzzyIsNull(fun.m_e) && qFuzzyIsNull(fun.m_f); + stream << ushort(type3 ? 3 : 4) << ushort(0); + stream << toFixedS1516(fun.m_g); + stream << toFixedS1516(fun.m_a); + stream << toFixedS1516(fun.m_b); + stream << toFixedS1516(fun.m_c); + stream << toFixedS1516(fun.m_d); + if (type3) + return 12 + 5 * 4; + stream << toFixedS1516(fun.m_e); + stream << toFixedS1516(fun.m_f); + return 12 + 7 * 4; + } + + Q_ASSERT(trc.m_type == QColorTrc::Type::Table); + stream << uint(Tag::curv) << uint(0); + stream << uint(trc.m_table.m_tableSize); + if (!trc.m_table.m_table16.isEmpty()) { + for (uint i = 0; i < trc.m_table.m_tableSize; ++i) { + stream << ushort(trc.m_table.m_table16[i]); + } + } else { + for (uint i = 0; i < trc.m_table.m_tableSize; ++i) { + stream << ushort(trc.m_table.m_table8[i] * 257U); + } + } + return 12 + 2 * trc.m_table.m_tableSize; +} + +QByteArray toIccProfile(const QColorSpace &space) +{ + if (!space.isValid()) + return QByteArray(); + + const QColorSpacePrivate *spaceDPtr = QColorSpacePrivate::get(space); + + constexpr int tagCount = 9; + constexpr uint profileDataOffset = 128 + 4 + 12 * tagCount; + constexpr uint variableTagTableOffsets = 128 + 4 + 12 * 5; + uint currentOffset = 0; + uint rTrcOffset, gTrcOffset, bTrcOffset; + uint rTrcSize, gTrcSize, bTrcSize; + uint descOffset, descSize; + + QBuffer buffer; + buffer.open(QIODevice::WriteOnly); + QDataStream stream(&buffer); + + // Profile header: + stream << uint(0); // Size, we will update this later + stream << uint(0); + stream << uint(0x02400000); // Version 2.4 (note we use 'para' from version 4) + stream << uint(ProfileClass::Display); + stream << uint(Tag::RGB_); + stream << uint(Tag::XYZ_); + stream << uint(0) << uint(0) << uint(0); + stream << uint(Tag::acsp); + stream << uint(0) << uint(0) << uint(0); + stream << uint(0) << uint(0) << uint(0); + stream << uint(1); // Rendering intent + stream << uint(0x0000f6d6); // D50 X + stream << uint(0x00010000); // D50 Y + stream << uint(0x0000d32d); // D50 Z + stream << IccTag('Q','t', QT_VERSION_MAJOR, QT_VERSION_MINOR); + stream << uint(0) << uint(0) << uint(0) << uint(0); + stream << uint(0) << uint(0) << uint(0) << uint(0) << uint(0) << uint(0) << uint(0); + + // Tag table: + stream << uint(tagCount); + stream << uint(Tag::rXYZ) << uint(profileDataOffset + 00) << uint(20); + stream << uint(Tag::gXYZ) << uint(profileDataOffset + 20) << uint(20); + stream << uint(Tag::bXYZ) << uint(profileDataOffset + 40) << uint(20); + stream << uint(Tag::wtpt) << uint(profileDataOffset + 60) << uint(20); + stream << uint(Tag::cprt) << uint(profileDataOffset + 80) << uint(12); + // From here the offset and size will be updated later: + stream << uint(Tag::rTRC) << uint(0) << uint(0); + stream << uint(Tag::gTRC) << uint(0) << uint(0); + stream << uint(Tag::bTRC) << uint(0) << uint(0); + stream << uint(Tag::desc) << uint(0) << uint(0); + // TODO: consider adding 'chad' tag (required in ICC >=4 when we have non-D50 whitepoint) + currentOffset = profileDataOffset; + + // Tag data: + stream << uint(Tag::XYZ_) << uint(0); + stream << toFixedS1516(spaceDPtr->toXyz.r.x); + stream << toFixedS1516(spaceDPtr->toXyz.r.y); + stream << toFixedS1516(spaceDPtr->toXyz.r.z); + stream << uint(Tag::XYZ_) << uint(0); + stream << toFixedS1516(spaceDPtr->toXyz.g.x); + stream << toFixedS1516(spaceDPtr->toXyz.g.y); + stream << toFixedS1516(spaceDPtr->toXyz.g.z); + stream << uint(Tag::XYZ_) << uint(0); + stream << toFixedS1516(spaceDPtr->toXyz.b.x); + stream << toFixedS1516(spaceDPtr->toXyz.b.y); + stream << toFixedS1516(spaceDPtr->toXyz.b.z); + stream << uint(Tag::XYZ_) << uint(0); + stream << toFixedS1516(spaceDPtr->whitePoint.x); + stream << toFixedS1516(spaceDPtr->whitePoint.y); + stream << toFixedS1516(spaceDPtr->whitePoint.z); + stream << uint(Tag::text) << uint(0); + stream << uint(IccTag('N', '/', 'A', '\0')); + currentOffset += 92; + + // From now on the data is variable sized: + rTrcOffset = currentOffset; + rTrcSize = writeColorTrc(stream, spaceDPtr->trc[0]); + currentOffset += rTrcSize; + if (spaceDPtr->trc[0] == spaceDPtr->trc[1]) { + gTrcOffset = rTrcOffset; + gTrcSize = rTrcSize; + } else { + gTrcOffset = currentOffset; + gTrcSize = writeColorTrc(stream, spaceDPtr->trc[1]); + currentOffset += gTrcSize; + } + if (spaceDPtr->trc[0] == spaceDPtr->trc[2]) { + bTrcOffset = rTrcOffset; + bTrcSize = rTrcSize; + } else { + bTrcOffset = currentOffset; + bTrcSize = writeColorTrc(stream, spaceDPtr->trc[2]); + currentOffset += bTrcSize; + } + + descOffset = currentOffset; + QByteArray description = spaceDPtr->description.toUtf8(); + stream << uint(Tag::desc) << uint(0); + stream << uint(description.size() + 1); + stream.writeRawData(description.constData(), description.size() + 1); + stream << uint(0) << uint(0); + stream << ushort(0) << uchar(0); + QByteArray macdesc(67, '\0'); + stream.writeRawData(macdesc.constData(), 67); + descSize = 90 + description.size() + 1; + currentOffset += descSize; + + buffer.close(); + QByteArray iccProfile = buffer.buffer(); + // Now write final size + *(quint32_be *)iccProfile.data() = iccProfile.size(); + // And the final indices and sizes of variable size tags: + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 4) = rTrcOffset; + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 8) = rTrcSize; + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 12 + 4) = gTrcOffset; + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 12 + 8) = gTrcSize; + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 2 * 12 + 4) = bTrcOffset; + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 2 * 12 + 8) = bTrcSize; + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 3 * 12 + 4) = descOffset; + *(quint32_be *)(iccProfile.data() + variableTagTableOffsets + 3 * 12 + 8) = descSize; + +#if !defined(QT_NO_DEBUG) || defined(QT_FORCE_ASSERTS) + const ICCProfileHeader *iccHeader = (const ICCProfileHeader *)iccProfile.constData(); + Q_ASSERT(qsizetype(iccHeader->profileSize) == qsizetype(iccProfile.size())); + Q_ASSERT(isValidIccProfile(*iccHeader)); +#endif + + return iccProfile; +} + +struct TagEntry { + quint32 offset; + quint32 size; +}; + +bool parseXyzData(const QByteArray &data, const TagEntry &tagEntry, QColorVector &colorVector) +{ + if (tagEntry.size < sizeof(XYZTagData)) { + qCWarning(lcIcc) << "Undersized XYZ tag"; + return false; + } + const XYZTagData *xyz = reinterpret_cast<const XYZTagData *>(data.constData() + tagEntry.offset); + if (xyz->type != quint32(Tag::XYZ_)) { + qCWarning(lcIcc) << "Bad XYZ content type"; + return false; + } + const float x = fromFixedS1516(xyz->fixedX); + const float y = fromFixedS1516(xyz->fixedY); + const float z = fromFixedS1516(xyz->fixedZ); + + colorVector = QColorVector(x, y, z); + return true; +} + +bool parseTRC(const QByteArray &data, const TagEntry &tagEntry, QColorTrc &gamma) +{ + const GenericTagData *trcData = reinterpret_cast<const GenericTagData *>(data.constData() + tagEntry.offset); + if (trcData->type == quint32(Tag::curv)) { + const CurvTagData *curv = static_cast<const CurvTagData *>(trcData); + if (curv->valueCount > (1 << 16)) + return false; + if (tagEntry.size - 12 < 2 * curv->valueCount) + return false; + if (curv->valueCount == 0) { + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = QColorTransferFunction(); // Linear + } else if (curv->valueCount == 1) { + float g = curv->value[0] * (1.0f / 256.0f); + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = QColorTransferFunction::fromGamma(g); + } else { + QVector<quint16> tabl; + tabl.resize(curv->valueCount); + for (uint i = 0; i < curv->valueCount; ++i) + tabl[i] = curv->value[i]; + QColorTransferTable table = QColorTransferTable(curv->valueCount, std::move(tabl)); + QColorTransferFunction curve; + if (!table.asColorTransferFunction(&curve)) { + gamma.m_type = QColorTrc::Type::Table; + gamma.m_table = table; + } else { + qCDebug(lcIcc) << "Detected curv table as function"; + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = curve; + } + } + return true; + } + if (trcData->type == quint32(Tag::para)) { + if (tagEntry.size < sizeof(ParaTagData)) + return false; + const ParaTagData *para = static_cast<const ParaTagData *>(trcData); + switch (para->curveType) { + case 0: { + float g = fromFixedS1516(para->parameter[0]); + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = QColorTransferFunction::fromGamma(g); + break; + } + case 1: { + if (tagEntry.size < sizeof(ParaTagData) + 2 * 4) + return false; + float g = fromFixedS1516(para->parameter[0]); + float a = fromFixedS1516(para->parameter[1]); + float b = fromFixedS1516(para->parameter[2]); + float d = -b / a; + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = QColorTransferFunction(a, b, 0.0f, d, 0.0f, 0.0f, g); + break; + } + case 2: { + if (tagEntry.size < sizeof(ParaTagData) + 3 * 4) + return false; + float g = fromFixedS1516(para->parameter[0]); + float a = fromFixedS1516(para->parameter[1]); + float b = fromFixedS1516(para->parameter[2]); + float c = fromFixedS1516(para->parameter[3]); + float d = -b / a; + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = QColorTransferFunction(a, b, 0.0f, d, c, c, g); + break; + } + case 3: { + if (tagEntry.size < sizeof(ParaTagData) + 4 * 4) + return false; + float g = fromFixedS1516(para->parameter[0]); + float a = fromFixedS1516(para->parameter[1]); + float b = fromFixedS1516(para->parameter[2]); + float c = fromFixedS1516(para->parameter[3]); + float d = fromFixedS1516(para->parameter[4]); + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = QColorTransferFunction(a, b, c, d, 0.0f, 0.0f, g); + break; + } + case 4: { + if (tagEntry.size < sizeof(ParaTagData) + 6 * 4) + return false; + float g = fromFixedS1516(para->parameter[0]); + float a = fromFixedS1516(para->parameter[1]); + float b = fromFixedS1516(para->parameter[2]); + float c = fromFixedS1516(para->parameter[3]); + float d = fromFixedS1516(para->parameter[4]); + float e = fromFixedS1516(para->parameter[5]); + float f = fromFixedS1516(para->parameter[6]); + gamma.m_type = QColorTrc::Type::Function; + gamma.m_fun = QColorTransferFunction(a, b, c, d, e, f, g); + break; + } + default: + qCWarning(lcIcc) << "Unknown para type" << uint(para->curveType); + return false; + } + return true; + } + qCWarning(lcIcc) << "Invalid TRC data type"; + return false; +} + +bool parseDesc(const QByteArray &data, const TagEntry &tagEntry, QString &descName) +{ + const GenericTagData *tag = (const GenericTagData *)(data.constData() + tagEntry.offset); + + // Either 'desc' (ICCv2) or 'mluc' (ICCv4) + if (tag->type == quint32(Tag::desc)) { + if (tagEntry.size < sizeof(DescTagData)) + return false; + const DescTagData *desc = (const DescTagData *)(data.constData() + tagEntry.offset); + const quint32 len = desc->asciiDescriptionLength; + if (len < 1) + return false; + if (tagEntry.size - 12 < len) + return false; + if (desc->asciiDescription[len - 1] != '\0') + return false; + descName = QString::fromLatin1(desc->asciiDescription, len - 1); + return true; + } + if (tag->type != quint32(Tag::mluc)) + return false; + + if (tagEntry.size < sizeof(MlucTagData)) + return false; + const MlucTagData *mluc = (const MlucTagData *)(data.constData() + tagEntry.offset); + if (mluc->recordCount < 1) + return false; + if (mluc->recordSize < 12) + return false; + // We just use the primary record regardless of language or country. + const quint32 stringOffset = mluc->records[0].offset; + const quint32 stringSize = mluc->records[0].size; + if (tagEntry.size < stringOffset || tagEntry.size - stringOffset < stringSize ) + return false; + if ((stringSize | stringOffset) & 1) + return false; + quint32 stringLen = stringSize / 2; + const ushort *unicodeString = (const ushort *)(data.constData() + tagEntry.offset + stringOffset); + // The given length shouldn't include 0-termination, but might. + if (stringLen > 1 && unicodeString[stringLen - 1] == 0) + --stringLen; + QVarLengthArray<quint16> utf16hostendian(stringLen); + qFromBigEndian<ushort>(unicodeString, stringLen, utf16hostendian.data()); + descName = QString::fromUtf16(utf16hostendian.data(), stringLen); + return true; +} + +bool fromIccProfile(const QByteArray &data, QColorSpace *colorSpace) +{ + if (data.size() < qsizetype(sizeof(ICCProfileHeader))) { + qCWarning(lcIcc) << "fromIccProfile: failed size sanity 1"; + return false; + } + const ICCProfileHeader *header = (const ICCProfileHeader *)data.constData(); + if (!isValidIccProfile(*header)) { + qCWarning(lcIcc) << "fromIccProfile: failed general sanity check"; + return false; + } + if (qsizetype(header->profileSize) > data.size()) { + qCWarning(lcIcc) << "fromIccProfile: failed size sanity 2"; + return false; + } + + // Read tag index + const TagTableEntry *tagTable = (const TagTableEntry *)(data.constData() + sizeof(ICCProfileHeader)); + const qsizetype offsetToData = sizeof(ICCProfileHeader) + header->tagCount * sizeof(TagTableEntry); + if (offsetToData > data.size()) { + qCWarning(lcIcc) << "fromIccProfile: failed index size sanity"; + return false; + } + + QHash<Tag, TagEntry> tagIndex; + for (uint i = 0; i < header->tagCount; ++i) { + // Sanity check tag sizes and offsets: + if (qsizetype(tagTable[i].offset) < offsetToData) { + qCWarning(lcIcc) << "fromIccProfile: failed tag offset sanity 1"; + return false; + } + // Checked separately from (+ size) to handle overflow. + if (tagTable[i].offset > header->profileSize) { + qCWarning(lcIcc) << "fromIccProfile: failed tag offset sanity 2"; + return false; + } + if (tagTable[i].size < 12) { + qCWarning(lcIcc) << "fromIccProfile: failed minimal tag size sanity"; + return false; + } + if (tagTable[i].size > header->profileSize - tagTable[i].offset) { + qCWarning(lcIcc) << "fromIccProfile: failed tag offset + size sanity"; + return false; + } + if (tagTable[i].offset & 0x03) { + qCWarning(lcIcc) << "fromIccProfile: invalid tag offset alignment"; + return false; + } +// printf("'%4s' %d %d\n", (const char *)&tagTable[i].signature, +// quint32(tagTable[i].offset), +// quint32(tagTable[i].size)); + tagIndex.insert(Tag(quint32(tagTable[i].signature)), { tagTable[i].offset, tagTable[i].size }); + } + + // Check the profile is three-component matrix based (what we currently support): + if (!tagIndex.contains(Tag::rXYZ) || !tagIndex.contains(Tag::gXYZ) || !tagIndex.contains(Tag::bXYZ) || + !tagIndex.contains(Tag::rTRC) || !tagIndex.contains(Tag::gTRC) || !tagIndex.contains(Tag::bTRC) || + !tagIndex.contains(Tag::wtpt)) { + qCWarning(lcIcc) << "fromIccProfile: Unsupported ICC profile - not three component matrix based"; + return false; + } + + QColorSpacePrivate *colorspaceDPtr = QColorSpacePrivate::getWritable(*colorSpace); + + // Parse XYZ tags + if (!parseXyzData(data, tagIndex[Tag::rXYZ], colorspaceDPtr->toXyz.r)) + return false; + if (!parseXyzData(data, tagIndex[Tag::gXYZ], colorspaceDPtr->toXyz.g)) + return false; + if (!parseXyzData(data, tagIndex[Tag::bXYZ], colorspaceDPtr->toXyz.b)) + return false; + if (!parseXyzData(data, tagIndex[Tag::wtpt], colorspaceDPtr->whitePoint)) + return false; + + colorspaceDPtr->primaries = QColorSpace::Primaries::Custom; + if (colorspaceDPtr->toXyz == QColorMatrix::toXyzFromSRgb()) { + qCDebug(lcIcc) << "fromIccProfile: sRGB primaries detected"; + colorspaceDPtr->primaries = QColorSpace::Primaries::SRgb; + } else if (colorspaceDPtr->toXyz == QColorMatrix::toXyzFromAdobeRgb()) { + qCDebug(lcIcc) << "fromIccProfile: Adobe RGB primaries detected"; + colorspaceDPtr->primaries = QColorSpace::Primaries::AdobeRgb; + } else if (colorspaceDPtr->toXyz == QColorMatrix::toXyzFromDciP3D65()) { + qCDebug(lcIcc) << "fromIccProfile: DCI-P3 D65 primaries detected"; + colorspaceDPtr->primaries = QColorSpace::Primaries::DciP3D65; + } + if (colorspaceDPtr->toXyz == QColorMatrix::toXyzFromProPhotoRgb()) { + qCDebug(lcIcc) << "fromIccProfile: ProPhoto RGB primaries detected"; + colorspaceDPtr->primaries = QColorSpace::Primaries::ProPhotoRgb; + } + // Reset the matrix to our canonical values: + if (colorspaceDPtr->primaries != QColorSpace::Primaries::Custom) + colorspaceDPtr->setToXyzMatrix(); + + // Parse TRC tags + TagEntry rTrc; + TagEntry gTrc; + TagEntry bTrc; + if (tagIndex.contains(Tag::aarg) && tagIndex.contains(Tag::aagg) && tagIndex.contains(Tag::aabg)) { + // Apple extension for parametric version of TRCs in ICCv2: + rTrc = tagIndex[Tag::aarg]; + gTrc = tagIndex[Tag::aagg]; + bTrc = tagIndex[Tag::aabg]; + } else { + rTrc = tagIndex[Tag::rTRC]; + gTrc = tagIndex[Tag::gTRC]; + bTrc = tagIndex[Tag::bTRC]; + } + + QColorTrc rCurve; + QColorTrc gCurve; + QColorTrc bCurve; + if (!parseTRC(data, rTrc, rCurve)) { + qCWarning(lcIcc) << "fromIccProfile: Invalid rTRC"; + return false; + } + if (!parseTRC(data, gTrc, gCurve)) { + qCWarning(lcIcc) << "fromIccProfile: Invalid gTRC"; + return false; + } + if (!parseTRC(data, bTrc, bCurve)) { + qCWarning(lcIcc) << "fromIccProfile: Invalid bTRC"; + return false; + } + if (rCurve == gCurve && gCurve == bCurve && rCurve.m_type == QColorTrc::Type::Function) { + if (rCurve.m_fun.isLinear()) { + qCDebug(lcIcc) << "fromIccProfile: Linear gamma detected"; + colorspaceDPtr->trc[0] = QColorTransferFunction(); + colorspaceDPtr->transferFunction = QColorSpace::TransferFunction::Linear; + colorspaceDPtr->gamma = 1.0f; + } else if (rCurve.m_fun.isGamma()) { + qCDebug(lcIcc) << "fromIccProfile: Simple gamma detected"; + colorspaceDPtr->trc[0] = QColorTransferFunction::fromGamma(rCurve.m_fun.m_g); + colorspaceDPtr->transferFunction = QColorSpace::TransferFunction::Gamma; + colorspaceDPtr->gamma = rCurve.m_fun.m_g; + } else if (rCurve.m_fun.isSRgb()) { + qCDebug(lcIcc) << "fromIccProfile: sRGB gamma detected"; + colorspaceDPtr->trc[0] = QColorTransferFunction::fromSRgb(); + colorspaceDPtr->transferFunction = QColorSpace::TransferFunction::SRgb; + } else { + colorspaceDPtr->trc[0] = rCurve; + colorspaceDPtr->transferFunction = QColorSpace::TransferFunction::Custom; + } + + colorspaceDPtr->trc[1] = colorspaceDPtr->trc[0]; + colorspaceDPtr->trc[2] = colorspaceDPtr->trc[0]; + } else { + colorspaceDPtr->trc[0] = rCurve; + colorspaceDPtr->trc[1] = gCurve; + colorspaceDPtr->trc[2] = bCurve; + colorspaceDPtr->transferFunction = QColorSpace::TransferFunction::Custom; + } + + if (tagIndex.contains(Tag::desc)) { + if (!parseDesc(data, tagIndex[Tag::desc], colorspaceDPtr->description)) + qCWarning(lcIcc) << "fromIccProfile: Failed to parse description"; + else + qCDebug(lcIcc) << "fromIccProfile: Description" << colorspaceDPtr->description; + } + + colorspaceDPtr->identifyColorSpace(); + if (colorspaceDPtr->namedColorSpace) + qCDebug(lcIcc) << "fromIccProfile: Named colorspace detected: " << QColorSpace::NamedColorSpace(colorspaceDPtr->namedColorSpace); + + colorspaceDPtr->iccProfile = data; + + return true; +} + +} // namespace QIcc + +QT_END_NAMESPACE |