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This commit is contained in:
nulano 2021-04-10 20:02:54 +02:00
parent 3c129142c8
commit ee41a133dd
1 changed files with 9 additions and 6 deletions
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15
src/libImaging/Jpeg2KDecode.c
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@ -738,7 +738,7 @@ j2k_decode_entry(Imaging im, ImagingCodecState state) {
If colorspace is unspecified, we assume:
Number of components Subsampling Colorspace
Number of components Subsampling Colorspace
-------------------------------------------------------
1 Any gray
2 Any gray (+ alpha)
@ -756,27 +756,30 @@ j2k_decode_entry(Imaging im, ImagingCodecState state) {
switch (image->numcomps) {
case 1:
case 2:
color_space = OPJ_CLRSPC_GRAY; break;
color_space = OPJ_CLRSPC_GRAY;
break;
case 3:
case 4:
switch (subsampling) {
case -1:
case 0:
case 3:
color_space = OPJ_CLRSPC_SRGB; break;
color_space = OPJ_CLRSPC_SRGB;
break;
case 1:
case 2:
color_space = OPJ_CLRSPC_SYCC; break;
color_space = OPJ_CLRSPC_SYCC;
break;
}
break;
}
}
for (n = 0; n < sizeof(j2k_unpackers) / sizeof (j2k_unpackers[0]); ++n) {
for (n = 0; n < sizeof(j2k_unpackers) / sizeof(j2k_unpackers[0]); ++n) {
if (color_space == j2k_unpackers[n].color_space &&
image->numcomps == j2k_unpackers[n].components &&
(j2k_unpackers[n].subsampling || (subsampling == -1)) &&
strcmp (im->mode, j2k_unpackers[n].mode) == 0) {
strcmp(im->mode, j2k_unpackers[n].mode) == 0) {
unpack = j2k_unpackers[n].unpacker;
break;
}