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Unified Diff: third_party/libjpeg_turbo/jdcolor.c

Issue 7554002: Updates libjpeg-turbo to 1.1.90 (r677) (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/
Patch Set: '' Created 9 years, 5 months ago
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Index: third_party/libjpeg_turbo/jdcolor.c
===================================================================
--- third_party/libjpeg_turbo/jdcolor.c (revision 95020)
+++ third_party/libjpeg_turbo/jdcolor.c (working copy)
@@ -22,10 +22,10 @@
struct jpeg_color_deconverter pub; /* public fields */
/* Private state for YCC->RGB conversion */
- int * Cr_r_tab; /* => table for Cr to R conversion */
- int * Cb_b_tab; /* => table for Cb to B conversion */
- INT32 * Cr_g_tab; /* => table for Cr to G conversion */
- INT32 * Cb_g_tab; /* => table for Cb to G conversion */
+ int * Cr_r_tab; /* => table for Cr to R conversion */
+ int * Cb_b_tab; /* => table for Cb to B conversion */
+ INT32 * Cr_g_tab; /* => table for Cr to G conversion */
+ INT32 * Cb_g_tab; /* => table for Cb to G conversion */
} my_color_deconverter;
typedef my_color_deconverter * my_cconvert_ptr;
@@ -37,9 +37,9 @@
* YCbCr is defined per CCIR 601-1, except that Cb and Cr are
* normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5.
* The conversion equations to be implemented are therefore
- * R = Y + 1.40200 * Cr
- * G = Y - 0.34414 * Cb - 0.71414 * Cr
- * B = Y + 1.77200 * Cb
+ * R = Y + 1.40200 * Cr
+ * G = Y - 0.34414 * Cb - 0.71414 * Cr
+ * B = Y + 1.77200 * Cb
* where Cb and Cr represent the incoming values less CENTERJSAMPLE.
* (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.)
*
@@ -60,9 +60,9 @@
* together before rounding.
*/
-#define SCALEBITS 16 /* speediest right-shift on some machines */
-#define ONE_HALF ((INT32) 1 << (SCALEBITS-1))
-#define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
+#define SCALEBITS 16 /* speediest right-shift on some machines */
+#define ONE_HALF ((INT32) 1 << (SCALEBITS-1))
+#define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
/*
@@ -79,26 +79,26 @@
cconvert->Cr_r_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (MAXJSAMPLE+1) * SIZEOF(int));
+ (MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cb_b_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (MAXJSAMPLE+1) * SIZEOF(int));
+ (MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cr_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (MAXJSAMPLE+1) * SIZEOF(INT32));
+ (MAXJSAMPLE+1) * SIZEOF(INT32));
cconvert->Cb_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (MAXJSAMPLE+1) * SIZEOF(INT32));
+ (MAXJSAMPLE+1) * SIZEOF(INT32));
for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
/* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
/* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
/* Cr=>R value is nearest int to 1.40200 * x */
cconvert->Cr_r_tab[i] = (int)
- RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
+ RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
/* Cb=>B value is nearest int to 1.77200 * x */
cconvert->Cb_b_tab[i] = (int)
- RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
+ RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
/* Cr=>G value is scaled-up -0.71414 * x */
cconvert->Cr_g_tab[i] = (- FIX(0.71414)) * x;
/* Cb=>G value is scaled-up -0.34414 * x */
@@ -121,8 +121,8 @@
METHODDEF(void)
ycc_rgb_convert (j_decompress_ptr cinfo,
- JSAMPIMAGE input_buf, JDIMENSION input_row,
- JSAMPARRAY output_buf, int num_rows)
+ JSAMPIMAGE input_buf, JDIMENSION input_row,
+ JSAMPARRAY output_buf, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register int y, cb, cr;
@@ -130,6 +130,10 @@
register JSAMPROW inptr0, inptr1, inptr2;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->output_width;
+ int rindex = rgb_red[cinfo->out_color_space];
+ int gindex = rgb_green[cinfo->out_color_space];
+ int bindex = rgb_blue[cinfo->out_color_space];
+ int rgbstride = rgb_pixelsize[cinfo->out_color_space];
/* copy these pointers into registers if possible */
register JSAMPLE * range_limit = cinfo->sample_range_limit;
register int * Crrtab = cconvert->Cr_r_tab;
@@ -149,12 +153,12 @@
cb = GETJSAMPLE(inptr1[col]);
cr = GETJSAMPLE(inptr2[col]);
/* Range-limiting is essential due to noise introduced by DCT losses. */
- outptr[rgb_red[cinfo->out_color_space]] = range_limit[y + Crrtab[cr]];
- outptr[rgb_green[cinfo->out_color_space]] = range_limit[y +
- ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
- SCALEBITS))];
- outptr[rgb_blue[cinfo->out_color_space]] = range_limit[y + Cbbtab[cb]];
- outptr += rgb_pixelsize[cinfo->out_color_space];
+ outptr[rindex] = range_limit[y + Crrtab[cr]];
+ outptr[gindex] = range_limit[y +
+ ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
+ SCALEBITS))];
+ outptr[bindex] = range_limit[y + Cbbtab[cb]];
+ outptr += rgbstride;
}
}
}
@@ -170,8 +174,8 @@
METHODDEF(void)
null_convert (j_decompress_ptr cinfo,
- JSAMPIMAGE input_buf, JDIMENSION input_row,
- JSAMPARRAY output_buf, int num_rows)
+ JSAMPIMAGE input_buf, JDIMENSION input_row,
+ JSAMPARRAY output_buf, int num_rows)
{
register JSAMPROW inptr, outptr;
register JDIMENSION count;
@@ -184,8 +188,8 @@
inptr = input_buf[ci][input_row];
outptr = output_buf[0] + ci;
for (count = num_cols; count > 0; count--) {
- *outptr = *inptr++; /* needn't bother with GETJSAMPLE() here */
- outptr += num_components;
+ *outptr = *inptr++; /* needn't bother with GETJSAMPLE() here */
+ outptr += num_components;
}
}
input_row++;
@@ -202,11 +206,11 @@
METHODDEF(void)
grayscale_convert (j_decompress_ptr cinfo,
- JSAMPIMAGE input_buf, JDIMENSION input_row,
- JSAMPARRAY output_buf, int num_rows)
+ JSAMPIMAGE input_buf, JDIMENSION input_row,
+ JSAMPARRAY output_buf, int num_rows)
{
jcopy_sample_rows(input_buf[0], (int) input_row, output_buf, 0,
- num_rows, cinfo->output_width);
+ num_rows, cinfo->output_width);
}
@@ -218,8 +222,8 @@
METHODDEF(void)
gray_rgb_convert (j_decompress_ptr cinfo,
- JSAMPIMAGE input_buf, JDIMENSION input_row,
- JSAMPARRAY output_buf, int num_rows)
+ JSAMPIMAGE input_buf, JDIMENSION input_row,
+ JSAMPARRAY output_buf, int num_rows)
{
register JSAMPROW inptr, outptr;
JSAMPLE *maxinptr;
@@ -250,8 +254,8 @@
METHODDEF(void)
ycck_cmyk_convert (j_decompress_ptr cinfo,
- JSAMPIMAGE input_buf, JDIMENSION input_row,
- JSAMPARRAY output_buf, int num_rows)
+ JSAMPIMAGE input_buf, JDIMENSION input_row,
+ JSAMPARRAY output_buf, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register int y, cb, cr;
@@ -279,13 +283,13 @@
cb = GETJSAMPLE(inptr1[col]);
cr = GETJSAMPLE(inptr2[col]);
/* Range-limiting is essential due to noise introduced by DCT losses. */
- outptr[0] = range_limit[MAXJSAMPLE - (y + Crrtab[cr])]; /* red */
- outptr[1] = range_limit[MAXJSAMPLE - (y + /* green */
- ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
- SCALEBITS)))];
- outptr[2] = range_limit[MAXJSAMPLE - (y + Cbbtab[cb])]; /* blue */
+ outptr[0] = range_limit[MAXJSAMPLE - (y + Crrtab[cr])]; /* red */
+ outptr[1] = range_limit[MAXJSAMPLE - (y + /* green */
+ ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
+ SCALEBITS)))];
+ outptr[2] = range_limit[MAXJSAMPLE - (y + Cbbtab[cb])]; /* blue */
/* K passes through unchanged */
- outptr[3] = inptr3[col]; /* don't need GETJSAMPLE here */
+ outptr[3] = inptr3[col]; /* don't need GETJSAMPLE here */
outptr += 4;
}
}
@@ -315,7 +319,7 @@
cconvert = (my_cconvert_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(my_color_deconverter));
+ SIZEOF(my_color_deconverter));
cinfo->cconvert = (struct jpeg_color_deconverter *) cconvert;
cconvert->pub.start_pass = start_pass_dcolor;
@@ -338,7 +342,7 @@
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
break;
- default: /* JCS_UNKNOWN can be anything */
+ default: /* JCS_UNKNOWN can be anything */
if (cinfo->num_components < 1)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
break;
@@ -353,11 +357,11 @@
case JCS_GRAYSCALE:
cinfo->out_color_components = 1;
if (cinfo->jpeg_color_space == JCS_GRAYSCALE ||
- cinfo->jpeg_color_space == JCS_YCbCr) {
+ cinfo->jpeg_color_space == JCS_YCbCr) {
cconvert->pub.color_convert = grayscale_convert;
/* For color->grayscale conversion, only the Y (0) component is needed */
for (ci = 1; ci < cinfo->num_components; ci++)
- cinfo->comp_info[ci].component_needed = FALSE;
+ cinfo->comp_info[ci].component_needed = FALSE;
} else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
@@ -402,7 +406,7 @@
if (cinfo->out_color_space == cinfo->jpeg_color_space) {
cinfo->out_color_components = cinfo->num_components;
cconvert->pub.color_convert = null_convert;
- } else /* unsupported non-null conversion */
+ } else /* unsupported non-null conversion */
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
}
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