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The Independent JPEG Group's JPEG software v6

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This commit is contained in:
Thomas G. Lane
1995-08-02 00:00:00 +00:00
committed by DRC
parent a8b67c4fbb
commit bc79e0680a
88 changed files with 9850 additions and 3723 deletions
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24
jdcolor.c
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@@ -1,7 +1,7 @@
/*
* jdcolor.c
*
* Copyright (C) 1991-1994, Thomas G. Lane.
* Copyright (C) 1991-1995, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@@ -63,14 +63,15 @@ typedef my_color_deconverter * my_cconvert_ptr;
/*
* Initialize for YCC->RGB colorspace conversion.
* Initialize tables for YCC->RGB colorspace conversion.
*/
METHODDEF void
ycc_rgb_start (j_decompress_ptr cinfo)
LOCAL void
build_ycc_rgb_table (j_decompress_ptr cinfo)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
INT32 i, x;
int i;
INT32 x;
SHIFT_TEMPS
cconvert->Cr_r_tab = (int *)
@@ -171,7 +172,7 @@ null_convert (j_decompress_ptr cinfo,
{
register JSAMPROW inptr, outptr;
register JDIMENSION count;
register int num_components = cinfo->output_components;
register int num_components = cinfo->num_components;
JDIMENSION num_cols = cinfo->output_width;
int ci;
@@ -210,7 +211,7 @@ grayscale_convert (j_decompress_ptr cinfo,
* Adobe-style YCCK->CMYK conversion.
* We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same
* conversion as above, while passing K (black) unchanged.
* We assume ycc_rgb_start has been called.
* We assume build_ycc_rgb_table has been called.
*/
METHODDEF void
@@ -262,7 +263,7 @@ ycck_cmyk_convert (j_decompress_ptr cinfo,
*/
METHODDEF void
null_method (j_decompress_ptr cinfo)
start_pass_dcolor (j_decompress_ptr cinfo)
{
/* no work needed */
}
@@ -282,8 +283,7 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_color_deconverter));
cinfo->cconvert = (struct jpeg_color_deconverter *) cconvert;
/* set start_pass to null method until we find out differently */
cconvert->pub.start_pass = null_method;
cconvert->pub.start_pass = start_pass_dcolor;
/* Make sure num_components agrees with jpeg_color_space */
switch (cinfo->jpeg_color_space) {
@@ -331,8 +331,8 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
case JCS_RGB:
cinfo->out_color_components = RGB_PIXELSIZE;
if (cinfo->jpeg_color_space == JCS_YCbCr) {
cconvert->pub.start_pass = ycc_rgb_start;
cconvert->pub.color_convert = ycc_rgb_convert;
build_ycc_rgb_table(cinfo);
} else if (cinfo->jpeg_color_space == JCS_RGB && RGB_PIXELSIZE == 3) {
cconvert->pub.color_convert = null_convert;
} else
@@ -342,8 +342,8 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
case JCS_CMYK:
cinfo->out_color_components = 4;
if (cinfo->jpeg_color_space == JCS_YCCK) {
cconvert->pub.start_pass = ycc_rgb_start;
cconvert->pub.color_convert = ycck_cmyk_convert;
build_ycc_rgb_table(cinfo);
} else if (cinfo->jpeg_color_space == JCS_CMYK) {
cconvert->pub.color_convert = null_convert;
} else