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Fix for vertically flipped tiff files reading

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This commit is contained in:
Vitaly Tuzov 2018-01-31 16:24:24 +03:00
parent cb66f82c1d
commit 24ee7b5080
1 changed files with 7 additions and 2 deletions
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9
modules/imgcodecs/src/grfmt_tiff.cpp
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@ -300,7 +300,6 @@ bool TiffDecoder::readData( Mat& img )
}
bool result = false;
bool color = img.channels() > 1;
uchar* data = img.ptr();
if( img.depth() != CV_8U && img.depth() != CV_16U && img.depth() != CV_32F && img.depth() != CV_64F )
return false;
@ -316,6 +315,10 @@ bool TiffDecoder::readData( Mat& img )
uint16 bpp = 8, ncn = photometric > 1 ? 3 : 1;
TIFFGetField( tif, TIFFTAG_BITSPERSAMPLE, &bpp );
TIFFGetField( tif, TIFFTAG_SAMPLESPERPIXEL, &ncn );
uint16 img_orientation = ORIENTATION_TOPLEFT;
TIFFGetField( tif, TIFFTAG_ORIENTATION, &img_orientation);
bool vert_flip = (img_orientation == ORIENTATION_BOTRIGHT) || (img_orientation == ORIENTATION_RIGHTBOT) ||
(img_orientation == ORIENTATION_BOTLEFT) || (img_orientation == ORIENTATION_LEFTBOT);
const int bitsPerByte = 8;
int dst_bpp = (int)(img.elemSize1() * bitsPerByte);
int wanted_channels = normalizeChannelsNumber(img.channels());
@ -358,13 +361,15 @@ bool TiffDecoder::readData( Mat& img )
double* buffer64 = (double*)buffer;
int tileidx = 0;
for( y = 0; y < m_height; y += tile_height0, data += img.step*tile_height0 )
for( y = 0; y < m_height; y += tile_height0 )
{
int tile_height = tile_height0;
if( y + tile_height > m_height )
tile_height = m_height - y;
uchar* data = img.ptr(vert_flip ? m_height - y - tile_height : y);
for( x = 0; x < m_width; x += tile_width0, tileidx++ )
{
int tile_width = tile_width0, ok;