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JPX 2000 image

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Jakub Melka
2019-05-12 14:59:08 +02:00
parent 4fa3c079f2
commit 5896196f56
2 changed files with 19 additions and 14 deletions
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12
PdfForQtLib/sources/pdfimage.cpp
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@ -244,6 +244,15 @@ PDFImage PDFImage::createImage(const PDFDocument* document, const PDFStream* str
opj_dparameters_t decompressParameters;
opj_set_default_decoder_parameters(&decompressParameters);
const bool isIndexed = dynamic_cast<const PDFIndexedColorSpace*>(image.m_colorSpace.data());
if (isIndexed)
{
// What is this flag for? When we have indexed color space, we do not want to resolve index to color
// using the color map in the image. Instead of that, we just get indices and resolve them using
// our color space.
decompressParameters.flags |= OPJ_DPARAMETERS_IGNORE_PCLR_CMAP_CDEF_FLAG;
}
constexpr CODEC_FORMAT formats[] = { OPJ_CODEC_J2K, OPJ_CODEC_JP2, OPJ_CODEC_JPT, OPJ_CODEC_JPP, OPJ_CODEC_JPX };
for (CODEC_FORMAT format : formats)
{
@ -327,7 +336,6 @@ PDFImage PDFImage::createImage(const PDFDocument* document, const PDFStream* str
const OPJ_UINT32 prec = jpegImage->comps[0].prec;
const OPJ_UINT32 sgnd = jpegImage->comps[0].sgnd;
const bool isIndexed = dynamic_cast<const PDFIndexedColorSpace*>(image.m_colorSpace.data());
int signumCorrection = (sgnd) ? (1 << (prec - 1)) : 0;
int shiftLeft = (jpegImage->comps[0].prec < 8) ? 8 - jpegImage->comps[0].prec : 0;
int shiftRight = (jpegImage->comps[0].prec > 8) ? jpegImage->comps[0].prec - 8 : 0;
@ -373,7 +381,7 @@ PDFImage PDFImage::createImage(const PDFDocument* document, const PDFStream* str
int index = stride * row + col * components + componentIndex;
Q_ASSERT(index < imageDataBuffer.size());
imageDataBuffer[index] = transformValue(jpegImage->comps[componentIndex].data[w * row + h]);
imageDataBuffer[index] = transformValue(jpegImage->comps[componentIndex].data[w * row + col]);
}
}
}