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Merge pull request #3417 from kkopachev/issue-3413

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Only ask for YCbCr->RGB libtiff conversion for jpeg-compressed tiffs
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Hugo 2018-10-19 21:58:39 +03:00 committed by GitHub
commit a2908734f3
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1 changed files with 278 additions and 272 deletions
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src/libImaging/TiffDecode.c
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@ -173,6 +173,7 @@ int ImagingLibTiffDecode(Imaging im, ImagingCodecState state, UINT8* buffer, int
char *filename = "tempfile.tif"; char *filename = "tempfile.tif";
char *mode = "r"; char *mode = "r";
TIFF *tiff; TIFF *tiff;
uint16 photometric = 0, compression;
/* buffer is the encoded file, bytes is the length of the encoded file */ /* buffer is the encoded file, bytes is the length of the encoded file */
@ -234,7 +235,12 @@ int ImagingLibTiffDecode(Imaging im, ImagingCodecState state, UINT8* buffer, int
} }
} }
TIFFGetFieldDefaulted(tiff, TIFFTAG_COMPRESSION, &compression);
TIFFGetField(tiff, TIFFTAG_PHOTOMETRIC, &photometric);
if (compression == COMPRESSION_JPEG && photometric == PHOTOMETRIC_YCBCR) {
/* Set pseudo-tag to force automatic YCbCr->RGB conversion */
TIFFSetField(tiff, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB); TIFFSetField(tiff, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB);
}
if (TIFFIsTiled(tiff)) { if (TIFFIsTiled(tiff)) {
uint32 x, y, tile_y; uint32 x, y, tile_y;