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packing into 24bit

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This commit is contained in:
wiredfool 2013-10-11 23:31:26 -07:00
parent 13d62c9f91
commit cb9440a2f5
3 changed files with 13 additions and 4 deletions
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2
libImaging/Pack.c
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@ -527,7 +527,7 @@ static struct {
{"YCbCr", "Cr", 8, band2},
/* LAB Color */
{"LAB", "LAB", 24, ImagingPackRGB},
{"LAB", "LAB", 24, copy3},
{"LAB", "L", 8, band0},
{"LAB", "A", 8, band1},
{"LAB", "B", 8, band2},

6
libImaging/Storage.c
View File

@ -180,9 +180,11 @@ ImagingNewPrologueSubtype(const char *mode, unsigned xsize, unsigned ysize,
} else if (strcmp(mode, "LAB") == 0) {
/* 24-bit color, luminance, + 2 color channels */
/* L is uint8, a,b are int8 */
im->bands = 3;
im->pixelsize = 4;
im->linesize = xsize * 4;
im->pixelsize = 3;
im->linesize = (xsize*4 + 3) & -4;
im->type = IMAGING_TYPE_SPECIAL;
} else {
free(im);

9
libImaging/Unpack.c
View File

@ -674,6 +674,13 @@ copy2(UINT8* out, const UINT8* in, int pixels)
memcpy(out, in, pixels*2);
}
static void
copy3(UINT8* out, const UINT8* in, int pixels)
{
/* LAB triples, 24bit */
memcpy(out, in, 3 * pixels);
}
static void
copy4(UINT8* out, const UINT8* in, int pixels)
{
@ -958,7 +965,7 @@ static struct {
{"YCbCr", "YCbCrK", 32, copy4},
/* LAB Color */
{"LAB", "LAB", 24, ImagingUnpackRGB},
{"LAB", "LAB", 24, copy3},
{"LAB", "L", 8, band0},
{"LAB", "A", 8, band1},
{"LAB", "B", 8, band2},