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EXR: support for lossy HTJ2K quality introduced in OpenEXR 3.5

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Mirco Miranda
2026-10-30 14:54:54 +01:00
committed by Mirco Miranda
parent 59157971e8
commit 487b51ae9c
2 changed files with 18 additions and 8 deletions
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src/imageformats/exr.cpp
+7
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@@ -774,9 +774,16 @@ bool EXRHandler::write(const QImage &image)
// set the DCT quality (used by DCT compressions only)
if (m_quality > -1 && m_quality <= 100) {
header.dwaCompressionLevel() = float(m_quality);
#if QT_VERSION_CHECK(OPENEXR_VERSION_MAJOR, OPENEXR_VERSION_MINOR, OPENEXR_VERSION_PATCH) >= QT_VERSION_CHECK(3, 5, 0)
header.lossyHTJ2KQuality() = float(m_quality) * 1.5f; // Lossy J2K max quality is 150
#endif
}
// make ZIP compression fast (used by ZIP compressions)
header.zipCompressionLevel() = 1;
#if QT_VERSION_CHECK(OPENEXR_VERSION_MAJOR, OPENEXR_VERSION_MINOR, OPENEXR_VERSION_PATCH) >= QT_VERSION_CHECK(3, 5, 0)
// make ZSTD compression fast (used by ZSTD compressions)
header.zstdCompressionLevel() = 1; // default is 5 -> 1 is faster
#endif
// set preview (don't set it for small images)
if (width > 1024 || height > 1024) {