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Diffstat (limited to '3rdparty/libjpeg/jccolor.c')
-rw-r--r--3rdparty/libjpeg/jccolor.c97
1 files changed, 47 insertions, 50 deletions
diff --git a/3rdparty/libjpeg/jccolor.c b/3rdparty/libjpeg/jccolor.c
index f6b4a493fda..db2ca429e8f 100644
--- a/3rdparty/libjpeg/jccolor.c
+++ b/3rdparty/libjpeg/jccolor.c
@@ -2,7 +2,7 @@
* jccolor.c
*
* Copyright (C) 1991-1996, Thomas G. Lane.
- * Modified 2011-2013 by Guido Vollbeding.
+ * Modified 2011-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@@ -105,14 +105,14 @@ rgb_ycc_start (j_compress_ptr cinfo)
/* Allocate and fill in the conversion tables. */
cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (TABLE_SIZE * SIZEOF(INT32)));
+ TABLE_SIZE * SIZEOF(INT32));
for (i = 0; i <= MAXJSAMPLE; i++) {
rgb_ycc_tab[i+R_Y_OFF] = FIX(0.299) * i;
rgb_ycc_tab[i+G_Y_OFF] = FIX(0.587) * i;
rgb_ycc_tab[i+B_Y_OFF] = FIX(0.114) * i + ONE_HALF;
- rgb_ycc_tab[i+R_CB_OFF] = (-FIX(0.168735892)) * i;
- rgb_ycc_tab[i+G_CB_OFF] = (-FIX(0.331264108)) * i;
+ rgb_ycc_tab[i+R_CB_OFF] = (- FIX(0.168735892)) * i;
+ rgb_ycc_tab[i+G_CB_OFF] = (- FIX(0.331264108)) * i;
/* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr.
* This ensures that the maximum output will round to MAXJSAMPLE
* not MAXJSAMPLE+1, and thus that we don't have to range-limit.
@@ -121,8 +121,8 @@ rgb_ycc_start (j_compress_ptr cinfo)
/* B=>Cb and R=>Cr tables are the same
rgb_ycc_tab[i+R_CR_OFF] = FIX(0.5) * i + CBCR_OFFSET + ONE_HALF-1;
*/
- rgb_ycc_tab[i+G_CR_OFF] = (-FIX(0.418687589)) * i;
- rgb_ycc_tab[i+B_CR_OFF] = (-FIX(0.081312411)) * i;
+ rgb_ycc_tab[i+G_CR_OFF] = (- FIX(0.418687589)) * i;
+ rgb_ycc_tab[i+B_CR_OFF] = (- FIX(0.081312411)) * i;
}
}
@@ -131,12 +131,12 @@ rgb_ycc_start (j_compress_ptr cinfo)
* Convert some rows of samples to the JPEG colorspace.
*
* Note that we change from the application's interleaved-pixel format
- * to our internal noninterleaved, one-plane-per-component format.
- * The input buffer is therefore three times as wide as the output buffer.
+ * to our internal noninterleaved, one-plane-per-component format. The
+ * input buffer is therefore three times as wide as the output buffer.
*
- * A starting row offset is provided only for the output buffer. The caller
- * can easily adjust the passed input_buf value to accommodate any row
- * offset required on that side.
+ * A starting row offset is provided only for the output buffer. The
+ * caller can easily adjust the passed input_buf value to accommodate
+ * any row offset required on that side.
*/
METHODDEF(void)
@@ -145,8 +145,8 @@ rgb_ycc_convert (j_compress_ptr cinfo,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
- register INT32 * ctab = cconvert->rgb_ycc_tab;
register int r, g, b;
+ register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr0, outptr1, outptr2;
register JDIMENSION col;
@@ -162,6 +162,7 @@ rgb_ycc_convert (j_compress_ptr cinfo,
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
+ inptr += RGB_PIXELSIZE;
/* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
* must be too; we do not need an explicit range-limiting operation.
* Hence the value being shifted is never negative, and we don't
@@ -179,7 +180,6 @@ rgb_ycc_convert (j_compress_ptr cinfo,
outptr2[col] = (JSAMPLE)
((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
>> SCALEBITS);
- inptr += RGB_PIXELSIZE;
}
}
}
@@ -201,8 +201,8 @@ rgb_gray_convert (j_compress_ptr cinfo,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
- register INT32 * ctab = cconvert->rgb_ycc_tab;
register int r, g, b;
+ register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr;
register JDIMENSION col;
@@ -215,11 +215,11 @@ rgb_gray_convert (j_compress_ptr cinfo,
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
+ inptr += RGB_PIXELSIZE;
/* Y */
outptr[col] = (JSAMPLE)
((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
>> SCALEBITS);
- inptr += RGB_PIXELSIZE;
}
}
}
@@ -228,8 +228,8 @@ rgb_gray_convert (j_compress_ptr cinfo,
/*
* Convert some rows of samples to the JPEG colorspace.
* This version handles Adobe-style CMYK->YCCK conversion,
- * where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same
- * conversion as above, while passing K (black) unchanged.
+ * where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the
+ * same conversion as above, while passing K (black) unchanged.
* We assume rgb_ycc_start has been called.
*/
@@ -239,8 +239,8 @@ cmyk_ycck_convert (j_compress_ptr cinfo,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
- register INT32 * ctab = cconvert->rgb_ycc_tab;
register int r, g, b;
+ register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr0, outptr1, outptr2, outptr3;
register JDIMENSION col;
@@ -259,6 +259,7 @@ cmyk_ycck_convert (j_compress_ptr cinfo,
b = MAXJSAMPLE - GETJSAMPLE(inptr[2]);
/* K passes through as-is */
outptr3[col] = inptr[3]; /* don't need GETJSAMPLE here */
+ inptr += 4;
/* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
* must be too; we do not need an explicit range-limiting operation.
* Hence the value being shifted is never negative, and we don't
@@ -276,7 +277,6 @@ cmyk_ycck_convert (j_compress_ptr cinfo,
outptr2[col] = (JSAMPLE)
((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
>> SCALEBITS);
- inptr += 4;
}
}
}
@@ -312,13 +312,13 @@ rgb_rgb1_convert (j_compress_ptr cinfo,
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
+ inptr += RGB_PIXELSIZE;
/* Assume that MAXJSAMPLE+1 is a power of 2, so that the MOD
* (modulo) operator is equivalent to the bitmask operator AND.
*/
outptr0[col] = (JSAMPLE) ((r - g + CENTERJSAMPLE) & MAXJSAMPLE);
outptr1[col] = (JSAMPLE) g;
outptr2[col] = (JSAMPLE) ((b - g + CENTERJSAMPLE) & MAXJSAMPLE);
- inptr += RGB_PIXELSIZE;
}
}
}
@@ -335,17 +335,17 @@ grayscale_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
- int instride = cinfo->input_components;
register JSAMPROW inptr;
register JSAMPROW outptr;
- register JDIMENSION col;
+ register JDIMENSION count;
+ register int instride = cinfo->input_components;
JDIMENSION num_cols = cinfo->image_width;
while (--num_rows >= 0) {
inptr = *input_buf++;
outptr = output_buf[0][output_row++];
- for (col = 0; col < num_cols; col++) {
- outptr[col] = inptr[0]; /* don't need GETJSAMPLE() here */
+ for (count = num_cols; count > 0; count--) {
+ *outptr++ = *inptr; /* don't need GETJSAMPLE() here */
inptr += instride;
}
}
@@ -396,21 +396,21 @@ null_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
- int ci;
- register int nc = cinfo->num_components;
register JSAMPROW inptr;
register JSAMPROW outptr;
- register JDIMENSION col;
+ register JDIMENSION count;
+ register int num_comps = cinfo->num_components;
JDIMENSION num_cols = cinfo->image_width;
+ int ci;
while (--num_rows >= 0) {
/* It seems fastest to make a separate pass for each component. */
- for (ci = 0; ci < nc; ci++) {
+ for (ci = 0; ci < num_comps; ci++) {
inptr = input_buf[0] + ci;
outptr = output_buf[ci][output_row];
- for (col = 0; col < num_cols; col++) {
+ for (count = num_cols; count > 0; count--) {
*outptr++ = *inptr; /* don't need GETJSAMPLE() here */
- inptr += nc;
+ inptr += num_comps;
}
}
input_buf++;
@@ -439,9 +439,8 @@ jinit_color_converter (j_compress_ptr cinfo)
{
my_cconvert_ptr cconvert;
- cconvert = (my_cconvert_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(my_color_converter));
+ cconvert = (my_cconvert_ptr) (*cinfo->mem->alloc_small)
+ ((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(my_color_converter));
cinfo->cconvert = &cconvert->pub;
/* set start_pass to null method until we find out differently */
cconvert->pub.start_pass = null_method;
@@ -455,9 +454,11 @@ jinit_color_converter (j_compress_ptr cinfo)
case JCS_RGB:
case JCS_BG_RGB:
+#if RGB_PIXELSIZE != 3
if (cinfo->input_components != RGB_PIXELSIZE)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
+#endif /* else share code with YCbCr */
case JCS_YCbCr:
case JCS_BG_YCC:
@@ -474,7 +475,6 @@ jinit_color_converter (j_compress_ptr cinfo)
default: /* JCS_UNKNOWN can be anything */
if (cinfo->input_components < 1)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
- break;
}
/* Support color transform only for RGB colorspaces */
@@ -507,19 +507,18 @@ jinit_color_converter (j_compress_ptr cinfo)
case JCS_BG_RGB:
if (cinfo->num_components != 3)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
- if (cinfo->in_color_space == cinfo->jpeg_color_space) {
- switch (cinfo->color_transform) {
- case JCT_NONE:
- cconvert->pub.color_convert = rgb_convert;
- break;
- case JCT_SUBTRACT_GREEN:
- cconvert->pub.color_convert = rgb_rgb1_convert;
- break;
- default:
- ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
- }
- } else
+ if (cinfo->in_color_space != cinfo->jpeg_color_space)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+ switch (cinfo->color_transform) {
+ case JCT_NONE:
+ cconvert->pub.color_convert = rgb_convert;
+ break;
+ case JCT_SUBTRACT_GREEN:
+ cconvert->pub.color_convert = rgb_rgb1_convert;
+ break;
+ default:
+ ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+ }
break;
case JCS_YCbCr:
@@ -572,10 +571,9 @@ jinit_color_converter (j_compress_ptr cinfo)
case JCS_CMYK:
if (cinfo->num_components != 4)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
- if (cinfo->in_color_space == JCS_CMYK)
- cconvert->pub.color_convert = null_convert;
- else
+ if (cinfo->in_color_space != JCS_CMYK)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+ cconvert->pub.color_convert = null_convert;
break;
case JCS_YCCK:
@@ -599,6 +597,5 @@ jinit_color_converter (j_compress_ptr cinfo)
cinfo->num_components != cinfo->input_components)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
cconvert->pub.color_convert = null_convert;
- break;
}
}