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32bit BITFIELDS compresion codec support #5707 Fixed

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wsfixed
This commit is contained in:
comdiv 2015-11-25 00:03:35 +05:00
parent c4edd86aeb
commit 81c746c2a8
1 changed files with 8 additions and 3 deletions
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11
modules/imgcodecs/src/grfmt_bmp.cpp
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@ -106,7 +106,7 @@ bool BmpDecoder::readHeader()
if( m_width > 0 && m_height != 0 && if( m_width > 0 && m_height != 0 &&
(((m_bpp == 1 || m_bpp == 4 || m_bpp == 8 || (((m_bpp == 1 || m_bpp == 4 || m_bpp == 8 ||
m_bpp == 24 || m_bpp == 32 ) && m_rle_code == BMP_RGB) || m_bpp == 24 || m_bpp == 32 ) && m_rle_code == BMP_RGB) ||
(m_bpp == 16 && (m_rle_code == BMP_RGB || m_rle_code == BMP_BITFIELDS)) || ((m_bpp == 16 || m_bpp == 32) && (m_rle_code == BMP_RGB || m_rle_code == BMP_BITFIELDS)) ||
(m_bpp == 4 && m_rle_code == BMP_RLE4) || (m_bpp == 4 && m_rle_code == BMP_RLE4) ||
(m_bpp == 8 && m_rle_code == BMP_RLE8))) (m_bpp == 8 && m_rle_code == BMP_RLE8)))
{ {
@ -132,6 +132,11 @@ bool BmpDecoder::readHeader()
else else
result = false; result = false;
} }
else if (m_bpp == 32 && m_rle_code == BMP_BITFIELDS)
{
// 32bit BMP not require to check something - we can simply allow it to use
;
}
else if( m_bpp == 16 && m_rle_code == BMP_RGB ) else if( m_bpp == 16 && m_rle_code == BMP_RGB )
m_bpp = 15; m_bpp = 15;
} }
@ -166,8 +171,8 @@ bool BmpDecoder::readHeader()
catch(...) catch(...)
{ {
} }
// in 32 bit case alpha channel is used - so require CV_8UC4 type
m_type = iscolor ? CV_8UC3 : CV_8UC1; m_type = iscolor ? (m_bpp == 32 ? CV_8UC4 : CV_8UC3 ) : CV_8UC1;
m_origin = m_height > 0 ? IPL_ORIGIN_BL : IPL_ORIGIN_TL; m_origin = m_height > 0 ? IPL_ORIGIN_BL : IPL_ORIGIN_TL;
m_height = std::abs(m_height); m_height = std::abs(m_height);