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PSD header checks according to specifications

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Mirco Miranda 2022-06-30 08:14:45 +02:00 committed by Mirco Miranda
parent 3d5090593c
commit b0a0bb1294
1 changed files with 33 additions and 2 deletions
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35
src/imageformats/psd.cpp
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@ -490,16 +490,47 @@ static QDataStream &operator>>(QDataStream &s, PSDHeader &header)
return s; return s;
} }
// Check that the header is a valid PSD. // Check that the header is a valid PSD (as written in the PSD specification).
static bool IsValid(const PSDHeader &header) static bool IsValid(const PSDHeader &header)
{ {
if (header.signature != 0x38425053) { // '8BPS' if (header.signature != 0x38425053) { // '8BPS'
//qDebug() << "PSD header: invalid signature" << header.signature;
return false;
}
if (header.version != 1 && header.version != 2) {
qDebug() << "PSD header: invalid version" << header.version;
return false;
}
if (header.depth != 8 &&
header.depth != 16 &&
header.depth != 32 &&
header.depth != 1) {
qDebug() << "PSD header: invalid depth" << header.depth;
return false;
}
if (header.color_mode != CM_RGB &&
header.color_mode != CM_GRAYSCALE &&
header.color_mode != CM_INDEXED &&
header.color_mode != CM_DUOTONE &&
header.color_mode != CM_CMYK &&
header.color_mode != CM_LABCOLOR &&
header.color_mode != CM_MULTICHANNEL &&
header.color_mode != CM_BITMAP) {
qDebug() << "PSD header: invalid color mode" << header.color_mode;
return false;
}
if (header.channel_count < 1 || header.channel_count > 56) {
qDebug() << "PSD header: invalid number of channels" << header.channel_count;
return false;
}
if (header.width > 300000 || header.height > 300000) {
qDebug() << "PSD header: invalid image size" << header.width << "x" << header.height;
return false; return false;
} }
return true; return true;
} }
// Check that the header is supported. // Check that the header is supported by this plugin.
static bool IsSupported(const PSDHeader &header) static bool IsSupported(const PSDHeader &header)
{ {
if (header.version != 1 && header.version != 2) { if (header.version != 1 && header.version != 2) {