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unpack CMYK TIFFs optional channels

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This commit is contained in:
Alexander 2018-01-06 17:55:29 +03:00
parent e5bd7eb623
commit 1f4fd49a80
2 changed files with 28 additions and 0 deletions
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4
src/PIL/TiffImagePlugin.py
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@ -233,6 +233,10 @@ OPEN_INFO = {
(II, 5, (1,), 1, (8, 8, 8, 8), ()): ("CMYK", "CMYK"),
(MM, 5, (1,), 1, (8, 8, 8, 8), ()): ("CMYK", "CMYK"),
(II, 5, (1,), 1, (8, 8, 8, 8, 8), (0,)): ("CMYK", "CMYKX"),
(MM, 5, (1,), 1, (8, 8, 8, 8, 8), (0,)): ("CMYK", "CMYKX"),
(II, 5, (1,), 1, (8, 8, 8, 8, 8, 8), (0, 0)): ("CMYK", "CMYKXX"),
(MM, 5, (1,), 1, (8, 8, 8, 8, 8, 8), (0, 0)): ("CMYK", "CMYKXX"),
(II, 6, (1,), 1, (8, 8, 8), ()): ("YCbCr", "YCbCr"),
(MM, 6, (1,), 1, (8, 8, 8), ()): ("YCbCr", "YCbCr"),

24
src/libImaging/Unpack.c
View File

@ -1041,6 +1041,28 @@ copy4(UINT8* out, const UINT8* in, int pixels)
memcpy(out, in, 4 * pixels);
}
static void
copy4skip1(UINT8* _out, const UINT8* in, int pixels)
{
int i;
UINT32* out = (UINT32*) _out;
for (i = 0; i < pixels; i++) {
out[i] = *(UINT32*)&in[0];
in += 5;
}
}
static void
copy4skip2(UINT8* _out, const UINT8* in, int pixels)
{
int i;
UINT32* out = (UINT32*) _out;
for (i = 0; i < pixels; i++) {
out[i] = *(UINT32*)&in[0];
in += 6;
}
}
/* Unpack to "I" and "F" images */
@ -1344,6 +1366,8 @@ static struct {
/* colour separation */
{"CMYK", "CMYK", 32, copy4},
{"CMYK", "CMYKX", 40, copy4skip1},
{"CMYK", "CMYKXX", 48, copy4skip2},
{"CMYK", "CMYK;I", 32, unpackCMYKI},
{"CMYK", "CMYK;L", 32, unpackRGBAL},
{"CMYK", "C", 8, band0},