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Support to MCH with 4+ channels (treat as CMYK)

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This commit is contained in:
Mirco Miranda 2022-11-11 14:17:25 +01:00
parent 50846f224f
commit 35883aa604
1 changed files with 13 additions and 4 deletions
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17
src/imageformats/psd.cpp
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@ -646,6 +646,9 @@ static bool IsValid(const PSDHeader &header)
// Check that the header is supported by this plugin.
static bool IsSupported(const PSDHeader &header)
{
if (!IsValid(header)) {
return false;
}
if (header.version != 1 && header.version != 2) {
return false;
}
@ -660,10 +663,15 @@ static bool IsSupported(const PSDHeader &header)
header.color_mode != CM_INDEXED &&
header.color_mode != CM_DUOTONE &&
header.color_mode != CM_CMYK &&
header.color_mode != CM_MULTICHANNEL &&
header.color_mode != CM_LABCOLOR &&
header.color_mode != CM_BITMAP) {
return false;
}
if (header.color_mode == CM_MULTICHANNEL &&
header.channel_count < 4) {
return false;
}
return true;
}
@ -729,13 +737,14 @@ static QImage::Format imageFormat(const PSDHeader &header, bool alpha)
else
format = header.channel_count < 4 || !alpha ? QImage::Format_RGB888 : QImage::Format_RGBA8888;
break;
case CM_CMYK: // Photoshop supports CMYK 8-bits and 16-bits only
case CM_MULTICHANNEL: // Treat MCH as CMYK (number of channel check is done in IsSupported())
case CM_CMYK: // Photoshop supports CMYK/MCH 8-bits and 16-bits only
if (header.depth == 16)
format = header.channel_count < 5 || !alpha ? QImage::Format_RGBX64 : QImage::Format_RGBA64;
else if (header.depth == 8)
format = header.channel_count < 5 || !alpha ? QImage::Format_RGB888 : QImage::Format_RGBA8888;
break;
case CM_LABCOLOR: // Photoshop supports LAB 8-bits and 16-bits only
case CM_LABCOLOR: // Photoshop supports LAB 8-bits and 16-bits only
if (header.depth == 16)
format = header.channel_count < 4 || !alpha ? QImage::Format_RGBX64 : QImage::Format_RGBA64;
else if (header.depth == 8)
@ -1078,7 +1087,7 @@ static bool LoadPSD(QDataStream &stream, const PSDHeader &header, QImage &img)
}
// Conversion to RGB
if (header.color_mode == CM_CMYK) {
if (header.color_mode == CM_CMYK || header.color_mode == CM_MULTICHANNEL) {
if (header.depth == 8)
cmykToRgb<quint8>(img.scanLine(y), imgChannels, psdScanline.data(), header.channel_count, header.width, alpha);
else
@ -1257,7 +1266,7 @@ bool PSDHandler::canRead(QIODevice *device)
}
}
return IsValid(header);
return IsSupported(header);
}
QImageIOPlugin::Capabilities PSDPlugin::capabilities(QIODevice *device, const QByteArray &format) const