summaryrefslogtreecommitdiff
path: root/media/libjpeg/jquant2.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/libjpeg/jquant2.c')
-rw-r--r--media/libjpeg/jquant2.c401
1 files changed, 202 insertions, 199 deletions
diff --git a/media/libjpeg/jquant2.c b/media/libjpeg/jquant2.c
index cfbd0f1526..44efb18cad 100644
--- a/media/libjpeg/jquant2.c
+++ b/media/libjpeg/jquant2.c
@@ -4,7 +4,7 @@
* This file was part of the Independent JPEG Group's software:
* Copyright (C) 1991-1996, Thomas G. Lane.
* libjpeg-turbo Modifications:
- * Copyright (C) 2009, 2014-2015, D. R. Commander.
+ * Copyright (C) 2009, 2014-2015, 2020, D. R. Commander.
* For conditions of distribution and use, see the accompanying README.ijg
* file.
*
@@ -73,14 +73,14 @@
* probably need to change these scale factors.
*/
-#define R_SCALE 2 /* scale R distances by this much */
-#define G_SCALE 3 /* scale G distances by this much */
-#define B_SCALE 1 /* and B by this much */
+#define R_SCALE 2 /* scale R distances by this much */
+#define G_SCALE 3 /* scale G distances by this much */
+#define B_SCALE 1 /* and B by this much */
-static const int c_scales[3]={R_SCALE, G_SCALE, B_SCALE};
-#define C0_SCALE c_scales[rgb_red[cinfo->out_color_space]]
-#define C1_SCALE c_scales[rgb_green[cinfo->out_color_space]]
-#define C2_SCALE c_scales[rgb_blue[cinfo->out_color_space]]
+static const int c_scales[3] = { R_SCALE, G_SCALE, B_SCALE };
+#define C0_SCALE c_scales[rgb_red[cinfo->out_color_space]]
+#define C1_SCALE c_scales[rgb_green[cinfo->out_color_space]]
+#define C2_SCALE c_scales[rgb_blue[cinfo->out_color_space]]
/*
* First we have the histogram data structure and routines for creating it.
@@ -106,7 +106,7 @@ static const int c_scales[3]={R_SCALE, G_SCALE, B_SCALE};
* each 2-D array has 2^6*2^5 = 2048 or 2^6*2^6 = 4096 entries.
*/
-#define MAXNUMCOLORS (MAXJSAMPLE+1) /* maximum size of colormap */
+#define MAXNUMCOLORS (MAXJSAMPLE + 1) /* maximum size of colormap */
/* These will do the right thing for either R,G,B or B,G,R color order,
* but you may not like the results for other color orders.
@@ -116,19 +116,19 @@ static const int c_scales[3]={R_SCALE, G_SCALE, B_SCALE};
#define HIST_C2_BITS 5 /* bits of precision in B/R histogram */
/* Number of elements along histogram axes. */
-#define HIST_C0_ELEMS (1<<HIST_C0_BITS)
-#define HIST_C1_ELEMS (1<<HIST_C1_BITS)
-#define HIST_C2_ELEMS (1<<HIST_C2_BITS)
+#define HIST_C0_ELEMS (1 << HIST_C0_BITS)
+#define HIST_C1_ELEMS (1 << HIST_C1_BITS)
+#define HIST_C2_ELEMS (1 << HIST_C2_BITS)
/* These are the amounts to shift an input value to get a histogram index. */
-#define C0_SHIFT (BITS_IN_JSAMPLE-HIST_C0_BITS)
-#define C1_SHIFT (BITS_IN_JSAMPLE-HIST_C1_BITS)
-#define C2_SHIFT (BITS_IN_JSAMPLE-HIST_C2_BITS)
+#define C0_SHIFT (BITS_IN_JSAMPLE - HIST_C0_BITS)
+#define C1_SHIFT (BITS_IN_JSAMPLE - HIST_C1_BITS)
+#define C2_SHIFT (BITS_IN_JSAMPLE - HIST_C2_BITS)
typedef UINT16 histcell; /* histogram cell; prefer an unsigned type */
-typedef histcell *histptr; /* for pointers to histogram cells */
+typedef histcell *histptr; /* for pointers to histogram cells */
typedef histcell hist1d[HIST_C2_ELEMS]; /* typedefs for the array */
typedef hist1d *hist2d; /* type for the 2nd-level pointers */
@@ -200,10 +200,10 @@ typedef my_cquantizer *my_cquantize_ptr;
*/
METHODDEF(void)
-prescan_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
- JSAMPARRAY output_buf, int num_rows)
+prescan_quantize(j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+ JSAMPARRAY output_buf, int num_rows)
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
register JSAMPROW ptr;
register histptr histp;
register hist3d histogram = cquantize->histogram;
@@ -215,9 +215,9 @@ prescan_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
ptr = input_buf[row];
for (col = width; col > 0; col--) {
/* get pixel value and index into the histogram */
- histp = & histogram[GETJSAMPLE(ptr[0]) >> C0_SHIFT]
- [GETJSAMPLE(ptr[1]) >> C1_SHIFT]
- [GETJSAMPLE(ptr[2]) >> C2_SHIFT];
+ histp = &histogram[ptr[0] >> C0_SHIFT]
+ [ptr[1] >> C1_SHIFT]
+ [ptr[2] >> C2_SHIFT];
/* increment, check for overflow and undo increment if so. */
if (++(*histp) <= 0)
(*histp)--;
@@ -249,7 +249,7 @@ typedef box *boxptr;
LOCAL(boxptr)
-find_biggest_color_pop (boxptr boxlist, int numboxes)
+find_biggest_color_pop(boxptr boxlist, int numboxes)
/* Find the splittable box with the largest color population */
/* Returns NULL if no splittable boxes remain */
{
@@ -269,7 +269,7 @@ find_biggest_color_pop (boxptr boxlist, int numboxes)
LOCAL(boxptr)
-find_biggest_volume (boxptr boxlist, int numboxes)
+find_biggest_volume(boxptr boxlist, int numboxes)
/* Find the splittable box with the largest (scaled) volume */
/* Returns NULL if no splittable boxes remain */
{
@@ -289,16 +289,16 @@ find_biggest_volume (boxptr boxlist, int numboxes)
LOCAL(void)
-update_box (j_decompress_ptr cinfo, boxptr boxp)
+update_box(j_decompress_ptr cinfo, boxptr boxp)
/* Shrink the min/max bounds of a box to enclose only nonzero elements, */
/* and recompute its volume and population */
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
hist3d histogram = cquantize->histogram;
histptr histp;
- int c0,c1,c2;
- int c0min,c0max,c1min,c1max,c2min,c2max;
- JLONG dist0,dist1,dist2;
+ int c0, c1, c2;
+ int c0min, c0max, c1min, c1max, c2min, c2max;
+ JLONG dist0, dist1, dist2;
long ccount;
c0min = boxp->c0min; c0max = boxp->c0max;
@@ -308,69 +308,69 @@ update_box (j_decompress_ptr cinfo, boxptr boxp)
if (c0max > c0min)
for (c0 = c0min; c0 <= c0max; c0++)
for (c1 = c1min; c1 <= c1max; c1++) {
- histp = & histogram[c0][c1][c2min];
+ histp = &histogram[c0][c1][c2min];
for (c2 = c2min; c2 <= c2max; c2++)
if (*histp++ != 0) {
boxp->c0min = c0min = c0;
goto have_c0min;
}
}
- have_c0min:
+have_c0min:
if (c0max > c0min)
for (c0 = c0max; c0 >= c0min; c0--)
for (c1 = c1min; c1 <= c1max; c1++) {
- histp = & histogram[c0][c1][c2min];
+ histp = &histogram[c0][c1][c2min];
for (c2 = c2min; c2 <= c2max; c2++)
if (*histp++ != 0) {
boxp->c0max = c0max = c0;
goto have_c0max;
}
}
- have_c0max:
+have_c0max:
if (c1max > c1min)
for (c1 = c1min; c1 <= c1max; c1++)
for (c0 = c0min; c0 <= c0max; c0++) {
- histp = & histogram[c0][c1][c2min];
+ histp = &histogram[c0][c1][c2min];
for (c2 = c2min; c2 <= c2max; c2++)
if (*histp++ != 0) {
boxp->c1min = c1min = c1;
goto have_c1min;
}
}
- have_c1min:
+have_c1min:
if (c1max > c1min)
for (c1 = c1max; c1 >= c1min; c1--)
for (c0 = c0min; c0 <= c0max; c0++) {
- histp = & histogram[c0][c1][c2min];
+ histp = &histogram[c0][c1][c2min];
for (c2 = c2min; c2 <= c2max; c2++)
if (*histp++ != 0) {
boxp->c1max = c1max = c1;
goto have_c1max;
}
}
- have_c1max:
+have_c1max:
if (c2max > c2min)
for (c2 = c2min; c2 <= c2max; c2++)
for (c0 = c0min; c0 <= c0max; c0++) {
- histp = & histogram[c0][c1min][c2];
+ histp = &histogram[c0][c1min][c2];
for (c1 = c1min; c1 <= c1max; c1++, histp += HIST_C2_ELEMS)
if (*histp != 0) {
boxp->c2min = c2min = c2;
goto have_c2min;
}
}
- have_c2min:
+have_c2min:
if (c2max > c2min)
for (c2 = c2max; c2 >= c2min; c2--)
for (c0 = c0min; c0 <= c0max; c0++) {
- histp = & histogram[c0][c1min][c2];
+ histp = &histogram[c0][c1min][c2];
for (c1 = c1min; c1 <= c1max; c1++, histp += HIST_C2_ELEMS)
if (*histp != 0) {
boxp->c2max = c2max = c2;
goto have_c2max;
}
}
- have_c2max:
+have_c2max:
/* Update box volume.
* We use 2-norm rather than real volume here; this biases the method
@@ -383,13 +383,13 @@ update_box (j_decompress_ptr cinfo, boxptr boxp)
dist0 = ((c0max - c0min) << C0_SHIFT) * C0_SCALE;
dist1 = ((c1max - c1min) << C1_SHIFT) * C1_SCALE;
dist2 = ((c2max - c2min) << C2_SHIFT) * C2_SCALE;
- boxp->volume = dist0*dist0 + dist1*dist1 + dist2*dist2;
+ boxp->volume = dist0 * dist0 + dist1 * dist1 + dist2 * dist2;
/* Now scan remaining volume of box and compute population */
ccount = 0;
for (c0 = c0min; c0 <= c0max; c0++)
for (c1 = c1min; c1 <= c1max; c1++) {
- histp = & histogram[c0][c1][c2min];
+ histp = &histogram[c0][c1][c2min];
for (c2 = c2min; c2 <= c2max; c2++, histp++)
if (*histp != 0) {
ccount++;
@@ -400,19 +400,19 @@ update_box (j_decompress_ptr cinfo, boxptr boxp)
LOCAL(int)
-median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
- int desired_colors)
+median_cut(j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
+ int desired_colors)
/* Repeatedly select and split the largest box until we have enough boxes */
{
- int n,lb;
- int c0,c1,c2,cmax;
- register boxptr b1,b2;
+ int n, lb;
+ int c0, c1, c2, cmax;
+ register boxptr b1, b2;
while (numboxes < desired_colors) {
/* Select box to split.
* Current algorithm: by population for first half, then by volume.
*/
- if (numboxes*2 <= desired_colors) {
+ if (numboxes * 2 <= desired_colors) {
b1 = find_biggest_color_pop(boxlist, numboxes);
} else {
b1 = find_biggest_volume(boxlist, numboxes);
@@ -421,8 +421,8 @@ median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
break;
b2 = &boxlist[numboxes]; /* where new box will go */
/* Copy the color bounds to the new box. */
- b2->c0max = b1->c0max; b2->c1max = b1->c1max; b2->c2max = b1->c2max;
- b2->c0min = b1->c0min; b2->c1min = b1->c1min; b2->c2min = b1->c2min;
+ b2->c0max = b1->c0max; b2->c1max = b1->c1max; b2->c2max = b1->c2max;
+ b2->c0min = b1->c0min; b2->c1min = b1->c1min; b2->c2min = b1->c2min;
/* Choose which axis to split the box on.
* Current algorithm: longest scaled axis.
* See notes in update_box about scaling distances.
@@ -434,13 +434,12 @@ median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
* This code does the right thing for R,G,B or B,G,R color orders only.
*/
if (rgb_red[cinfo->out_color_space] == 0) {
- cmax = c1; n = 1;
- if (c0 > cmax) { cmax = c0; n = 0; }
+ cmax = c1; n = 1;
+ if (c0 > cmax) { cmax = c0; n = 0; }
if (c2 > cmax) { n = 2; }
- }
- else {
- cmax = c1; n = 1;
- if (c2 > cmax) { cmax = c2; n = 2; }
+ } else {
+ cmax = c1; n = 1;
+ if (c2 > cmax) { cmax = c2; n = 2; }
if (c0 > cmax) { n = 0; }
}
/* Choose split point along selected axis, and update box bounds.
@@ -453,17 +452,17 @@ median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
case 0:
lb = (b1->c0max + b1->c0min) / 2;
b1->c0max = lb;
- b2->c0min = lb+1;
+ b2->c0min = lb + 1;
break;
case 1:
lb = (b1->c1max + b1->c1min) / 2;
b1->c1max = lb;
- b2->c1min = lb+1;
+ b2->c1min = lb + 1;
break;
case 2:
lb = (b1->c2max + b1->c2min) / 2;
b1->c2max = lb;
- b2->c2min = lb+1;
+ b2->c2min = lb + 1;
break;
}
/* Update stats for boxes */
@@ -476,16 +475,16 @@ median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
LOCAL(void)
-compute_color (j_decompress_ptr cinfo, boxptr boxp, int icolor)
+compute_color(j_decompress_ptr cinfo, boxptr boxp, int icolor)
/* Compute representative color for a box, put it in colormap[icolor] */
{
/* Current algorithm: mean weighted by pixels (not colors) */
/* Note it is important to get the rounding correct! */
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
hist3d histogram = cquantize->histogram;
histptr histp;
- int c0,c1,c2;
- int c0min,c0max,c1min,c1max,c2min,c2max;
+ int c0, c1, c2;
+ int c0min, c0max, c1min, c1max, c2min, c2max;
long count;
long total = 0;
long c0total = 0;
@@ -498,25 +497,25 @@ compute_color (j_decompress_ptr cinfo, boxptr boxp, int icolor)
for (c0 = c0min; c0 <= c0max; c0++)
for (c1 = c1min; c1 <= c1max; c1++) {
- histp = & histogram[c0][c1][c2min];
+ histp = &histogram[c0][c1][c2min];
for (c2 = c2min; c2 <= c2max; c2++) {
if ((count = *histp++) != 0) {
total += count;
- c0total += ((c0 << C0_SHIFT) + ((1<<C0_SHIFT)>>1)) * count;
- c1total += ((c1 << C1_SHIFT) + ((1<<C1_SHIFT)>>1)) * count;
- c2total += ((c2 << C2_SHIFT) + ((1<<C2_SHIFT)>>1)) * count;
+ c0total += ((c0 << C0_SHIFT) + ((1 << C0_SHIFT) >> 1)) * count;
+ c1total += ((c1 << C1_SHIFT) + ((1 << C1_SHIFT) >> 1)) * count;
+ c2total += ((c2 << C2_SHIFT) + ((1 << C2_SHIFT) >> 1)) * count;
}
}
}
- cinfo->colormap[0][icolor] = (JSAMPLE) ((c0total + (total>>1)) / total);
- cinfo->colormap[1][icolor] = (JSAMPLE) ((c1total + (total>>1)) / total);
- cinfo->colormap[2][icolor] = (JSAMPLE) ((c2total + (total>>1)) / total);
+ cinfo->colormap[0][icolor] = (JSAMPLE)((c0total + (total >> 1)) / total);
+ cinfo->colormap[1][icolor] = (JSAMPLE)((c1total + (total >> 1)) / total);
+ cinfo->colormap[2][icolor] = (JSAMPLE)((c2total + (total >> 1)) / total);
}
LOCAL(void)
-select_colors (j_decompress_ptr cinfo, int desired_colors)
+select_colors(j_decompress_ptr cinfo, int desired_colors)
/* Master routine for color selection */
{
boxptr boxlist;
@@ -524,8 +523,8 @@ select_colors (j_decompress_ptr cinfo, int desired_colors)
int i;
/* Allocate workspace for box list */
- boxlist = (boxptr) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, desired_colors * sizeof(box));
+ boxlist = (boxptr)(*cinfo->mem->alloc_small)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE, desired_colors * sizeof(box));
/* Initialize one box containing whole space */
numboxes = 1;
boxlist[0].c0min = 0;
@@ -535,12 +534,12 @@ select_colors (j_decompress_ptr cinfo, int desired_colors)
boxlist[0].c2min = 0;
boxlist[0].c2max = MAXJSAMPLE >> C2_SHIFT;
/* Shrink it to actually-used volume and set its statistics */
- update_box(cinfo, & boxlist[0]);
+ update_box(cinfo, &boxlist[0]);
/* Perform median-cut to produce final box list */
numboxes = median_cut(cinfo, boxlist, numboxes, desired_colors);
/* Compute the representative color for each box, fill colormap */
for (i = 0; i < numboxes; i++)
- compute_color(cinfo, & boxlist[i], i);
+ compute_color(cinfo, &boxlist[i], i);
cinfo->actual_number_of_colors = numboxes;
TRACEMS1(cinfo, 1, JTRC_QUANT_SELECTED, numboxes);
}
@@ -601,13 +600,13 @@ select_colors (j_decompress_ptr cinfo, int desired_colors)
/* log2(histogram cells in update box) for each axis; this can be adjusted */
-#define BOX_C0_LOG (HIST_C0_BITS-3)
-#define BOX_C1_LOG (HIST_C1_BITS-3)
-#define BOX_C2_LOG (HIST_C2_BITS-3)
+#define BOX_C0_LOG (HIST_C0_BITS - 3)
+#define BOX_C1_LOG (HIST_C1_BITS - 3)
+#define BOX_C2_LOG (HIST_C2_BITS - 3)
-#define BOX_C0_ELEMS (1<<BOX_C0_LOG) /* # of hist cells in update box */
-#define BOX_C1_ELEMS (1<<BOX_C1_LOG)
-#define BOX_C2_ELEMS (1<<BOX_C2_LOG)
+#define BOX_C0_ELEMS (1 << BOX_C0_LOG) /* # of hist cells in update box */
+#define BOX_C1_ELEMS (1 << BOX_C1_LOG)
+#define BOX_C2_ELEMS (1 << BOX_C2_LOG)
#define BOX_C0_SHIFT (C0_SHIFT + BOX_C0_LOG)
#define BOX_C1_SHIFT (C1_SHIFT + BOX_C1_LOG)
@@ -623,8 +622,8 @@ select_colors (j_decompress_ptr cinfo, int desired_colors)
*/
LOCAL(int)
-find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
- JSAMPLE colorlist[])
+find_nearby_colors(j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
+ JSAMPLE colorlist[])
/* Locate the colormap entries close enough to an update box to be candidates
* for the nearest entry to some cell(s) in the update box. The update box
* is specified by the center coordinates of its first cell. The number of
@@ -666,70 +665,70 @@ find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
for (i = 0; i < numcolors; i++) {
/* We compute the squared-c0-distance term, then add in the other two. */
- x = GETJSAMPLE(cinfo->colormap[0][i]);
+ x = cinfo->colormap[0][i];
if (x < minc0) {
tdist = (x - minc0) * C0_SCALE;
- min_dist = tdist*tdist;
+ min_dist = tdist * tdist;
tdist = (x - maxc0) * C0_SCALE;
- max_dist = tdist*tdist;
+ max_dist = tdist * tdist;
} else if (x > maxc0) {
tdist = (x - maxc0) * C0_SCALE;
- min_dist = tdist*tdist;
+ min_dist = tdist * tdist;
tdist = (x - minc0) * C0_SCALE;
- max_dist = tdist*tdist;
+ max_dist = tdist * tdist;
} else {
/* within cell range so no contribution to min_dist */
min_dist = 0;
if (x <= centerc0) {
tdist = (x - maxc0) * C0_SCALE;
- max_dist = tdist*tdist;
+ max_dist = tdist * tdist;
} else {
tdist = (x - minc0) * C0_SCALE;
- max_dist = tdist*tdist;
+ max_dist = tdist * tdist;
}
}
- x = GETJSAMPLE(cinfo->colormap[1][i]);
+ x = cinfo->colormap[1][i];
if (x < minc1) {
tdist = (x - minc1) * C1_SCALE;
- min_dist += tdist*tdist;
+ min_dist += tdist * tdist;
tdist = (x - maxc1) * C1_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
} else if (x > maxc1) {
tdist = (x - maxc1) * C1_SCALE;
- min_dist += tdist*tdist;
+ min_dist += tdist * tdist;
tdist = (x - minc1) * C1_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
} else {
/* within cell range so no contribution to min_dist */
if (x <= centerc1) {
tdist = (x - maxc1) * C1_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
} else {
tdist = (x - minc1) * C1_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
}
}
- x = GETJSAMPLE(cinfo->colormap[2][i]);
+ x = cinfo->colormap[2][i];
if (x < minc2) {
tdist = (x - minc2) * C2_SCALE;
- min_dist += tdist*tdist;
+ min_dist += tdist * tdist;
tdist = (x - maxc2) * C2_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
} else if (x > maxc2) {
tdist = (x - maxc2) * C2_SCALE;
- min_dist += tdist*tdist;
+ min_dist += tdist * tdist;
tdist = (x - minc2) * C2_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
} else {
/* within cell range so no contribution to min_dist */
if (x <= centerc2) {
tdist = (x - maxc2) * C2_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
} else {
tdist = (x - minc2) * C2_SCALE;
- max_dist += tdist*tdist;
+ max_dist += tdist * tdist;
}
}
@@ -745,15 +744,15 @@ find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
ncolors = 0;
for (i = 0; i < numcolors; i++) {
if (mindist[i] <= minmaxdist)
- colorlist[ncolors++] = (JSAMPLE) i;
+ colorlist[ncolors++] = (JSAMPLE)i;
}
return ncolors;
}
LOCAL(void)
-find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
- int numcolors, JSAMPLE colorlist[], JSAMPLE bestcolor[])
+find_best_colors(j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
+ int numcolors, JSAMPLE colorlist[], JSAMPLE bestcolor[])
/* Find the closest colormap entry for each cell in the update box,
* given the list of candidate colors prepared by find_nearby_colors.
* Return the indexes of the closest entries in the bestcolor[] array.
@@ -775,7 +774,7 @@ find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
/* Initialize best-distance for each cell of the update box */
bptr = bestdist;
- for (i = BOX_C0_ELEMS*BOX_C1_ELEMS*BOX_C2_ELEMS-1; i >= 0; i--)
+ for (i = BOX_C0_ELEMS * BOX_C1_ELEMS * BOX_C2_ELEMS - 1; i >= 0; i--)
*bptr++ = 0x7FFFFFFFL;
/* For each color selected by find_nearby_colors,
@@ -789,14 +788,14 @@ find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
#define STEP_C2 ((1 << C2_SHIFT) * C2_SCALE)
for (i = 0; i < numcolors; i++) {
- icolor = GETJSAMPLE(colorlist[i]);
+ icolor = colorlist[i];
/* Compute (square of) distance from minc0/c1/c2 to this color */
- inc0 = (minc0 - GETJSAMPLE(cinfo->colormap[0][icolor])) * C0_SCALE;
- dist0 = inc0*inc0;
- inc1 = (minc1 - GETJSAMPLE(cinfo->colormap[1][icolor])) * C1_SCALE;
- dist0 += inc1*inc1;
- inc2 = (minc2 - GETJSAMPLE(cinfo->colormap[2][icolor])) * C2_SCALE;
- dist0 += inc2*inc2;
+ inc0 = (minc0 - cinfo->colormap[0][icolor]) * C0_SCALE;
+ dist0 = inc0 * inc0;
+ inc1 = (minc1 - cinfo->colormap[1][icolor]) * C1_SCALE;
+ dist0 += inc1 * inc1;
+ inc2 = (minc2 - cinfo->colormap[2][icolor]) * C2_SCALE;
+ dist0 += inc2 * inc2;
/* Form the initial difference increments */
inc0 = inc0 * (2 * STEP_C0) + STEP_C0 * STEP_C0;
inc1 = inc1 * (2 * STEP_C1) + STEP_C1 * STEP_C1;
@@ -805,16 +804,16 @@ find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
bptr = bestdist;
cptr = bestcolor;
xx0 = inc0;
- for (ic0 = BOX_C0_ELEMS-1; ic0 >= 0; ic0--) {
+ for (ic0 = BOX_C0_ELEMS - 1; ic0 >= 0; ic0--) {
dist1 = dist0;
xx1 = inc1;
- for (ic1 = BOX_C1_ELEMS-1; ic1 >= 0; ic1--) {
+ for (ic1 = BOX_C1_ELEMS - 1; ic1 >= 0; ic1--) {
dist2 = dist1;
xx2 = inc2;
- for (ic2 = BOX_C2_ELEMS-1; ic2 >= 0; ic2--) {
+ for (ic2 = BOX_C2_ELEMS - 1; ic2 >= 0; ic2--) {
if (dist2 < *bptr) {
*bptr = dist2;
- *cptr = (JSAMPLE) icolor;
+ *cptr = (JSAMPLE)icolor;
}
dist2 += xx2;
xx2 += 2 * STEP_C2 * STEP_C2;
@@ -832,12 +831,12 @@ find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
LOCAL(void)
-fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
+fill_inverse_cmap(j_decompress_ptr cinfo, int c0, int c1, int c2)
/* Fill the inverse-colormap entries in the update box that contains */
/* histogram cell c0/c1/c2. (Only that one cell MUST be filled, but */
/* we can fill as many others as we wish.) */
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
hist3d histogram = cquantize->histogram;
int minc0, minc1, minc2; /* lower left corner of update box */
int ic0, ic1, ic2;
@@ -878,9 +877,9 @@ fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
cptr = bestcolor;
for (ic0 = 0; ic0 < BOX_C0_ELEMS; ic0++) {
for (ic1 = 0; ic1 < BOX_C1_ELEMS; ic1++) {
- cachep = & histogram[c0+ic0][c1+ic1][c2];
+ cachep = &histogram[c0 + ic0][c1 + ic1][c2];
for (ic2 = 0; ic2 < BOX_C2_ELEMS; ic2++) {
- *cachep++ = (histcell) (GETJSAMPLE(*cptr++) + 1);
+ *cachep++ = (histcell)((*cptr++) + 1);
}
}
}
@@ -892,11 +891,11 @@ fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
*/
METHODDEF(void)
-pass2_no_dither (j_decompress_ptr cinfo,
- JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
+pass2_no_dither(j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+ JSAMPARRAY output_buf, int num_rows)
/* This version performs no dithering */
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
hist3d histogram = cquantize->histogram;
register JSAMPROW inptr, outptr;
register histptr cachep;
@@ -910,27 +909,27 @@ pass2_no_dither (j_decompress_ptr cinfo,
outptr = output_buf[row];
for (col = width; col > 0; col--) {
/* get pixel value and index into the cache */
- c0 = GETJSAMPLE(*inptr++) >> C0_SHIFT;
- c1 = GETJSAMPLE(*inptr++) >> C1_SHIFT;
- c2 = GETJSAMPLE(*inptr++) >> C2_SHIFT;
- cachep = & histogram[c0][c1][c2];
+ c0 = (*inptr++) >> C0_SHIFT;
+ c1 = (*inptr++) >> C1_SHIFT;
+ c2 = (*inptr++) >> C2_SHIFT;
+ cachep = &histogram[c0][c1][c2];
/* If we have not seen this color before, find nearest colormap entry */
/* and update the cache */
if (*cachep == 0)
- fill_inverse_cmap(cinfo, c0,c1,c2);
+ fill_inverse_cmap(cinfo, c0, c1, c2);
/* Now emit the colormap index for this cell */
- *outptr++ = (JSAMPLE) (*cachep - 1);
+ *outptr++ = (JSAMPLE)(*cachep - 1);
}
}
}
METHODDEF(void)
-pass2_fs_dither (j_decompress_ptr cinfo,
- JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
+pass2_fs_dither(j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+ JSAMPARRAY output_buf, int num_rows)
/* This version performs Floyd-Steinberg dithering */
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
hist3d histogram = cquantize->histogram;
register LOCFSERROR cur0, cur1, cur2; /* current error or pixel value */
LOCFSERROR belowerr0, belowerr1, belowerr2; /* error for pixel below cur */
@@ -956,11 +955,11 @@ pass2_fs_dither (j_decompress_ptr cinfo,
outptr = output_buf[row];
if (cquantize->on_odd_row) {
/* work right to left in this row */
- inptr += (width-1) * 3; /* so point to rightmost pixel */
- outptr += width-1;
+ inptr += (width - 1) * 3; /* so point to rightmost pixel */
+ outptr += width - 1;
dir = -1;
dir3 = -3;
- errorptr = cquantize->fserrors + (width+1)*3; /* => entry after last column */
+ errorptr = cquantize->fserrors + (width + 1) * 3; /* => entry after last column */
cquantize->on_odd_row = FALSE; /* flip for next time */
} else {
/* work left to right in this row */
@@ -984,9 +983,9 @@ pass2_fs_dither (j_decompress_ptr cinfo,
* for either sign of the error value.
* Note: errorptr points to *previous* column's array entry.
*/
- cur0 = RIGHT_SHIFT(cur0 + errorptr[dir3+0] + 8, 4);
- cur1 = RIGHT_SHIFT(cur1 + errorptr[dir3+1] + 8, 4);
- cur2 = RIGHT_SHIFT(cur2 + errorptr[dir3+2] + 8, 4);
+ cur0 = RIGHT_SHIFT(cur0 + errorptr[dir3 + 0] + 8, 4);
+ cur1 = RIGHT_SHIFT(cur1 + errorptr[dir3 + 1] + 8, 4);
+ cur2 = RIGHT_SHIFT(cur2 + errorptr[dir3 + 2] + 8, 4);
/* Limit the error using transfer function set by init_error_limit.
* See comments with init_error_limit for rationale.
*/
@@ -997,44 +996,48 @@ pass2_fs_dither (j_decompress_ptr cinfo,
* The maximum error is +- MAXJSAMPLE (or less with error limiting);
* this sets the required size of the range_limit array.
*/
- cur0 += GETJSAMPLE(inptr[0]);
- cur1 += GETJSAMPLE(inptr[1]);
- cur2 += GETJSAMPLE(inptr[2]);
- cur0 = GETJSAMPLE(range_limit[cur0]);
- cur1 = GETJSAMPLE(range_limit[cur1]);
- cur2 = GETJSAMPLE(range_limit[cur2]);
+ cur0 += inptr[0];
+ cur1 += inptr[1];
+ cur2 += inptr[2];
+ cur0 = range_limit[cur0];
+ cur1 = range_limit[cur1];
+ cur2 = range_limit[cur2];
/* Index into the cache with adjusted pixel value */
- cachep = & histogram[cur0>>C0_SHIFT][cur1>>C1_SHIFT][cur2>>C2_SHIFT];
+ cachep =
+ &histogram[cur0 >> C0_SHIFT][cur1 >> C1_SHIFT][cur2 >> C2_SHIFT];
/* If we have not seen this color before, find nearest colormap */
/* entry and update the cache */
if (*cachep == 0)
- fill_inverse_cmap(cinfo, cur0>>C0_SHIFT,cur1>>C1_SHIFT,cur2>>C2_SHIFT);
+ fill_inverse_cmap(cinfo, cur0 >> C0_SHIFT, cur1 >> C1_SHIFT,
+ cur2 >> C2_SHIFT);
/* Now emit the colormap index for this cell */
- { register int pixcode = *cachep - 1;
- *outptr = (JSAMPLE) pixcode;
+ {
+ register int pixcode = *cachep - 1;
+ *outptr = (JSAMPLE)pixcode;
/* Compute representation error for this pixel */
- cur0 -= GETJSAMPLE(colormap0[pixcode]);
- cur1 -= GETJSAMPLE(colormap1[pixcode]);
- cur2 -= GETJSAMPLE(colormap2[pixcode]);
+ cur0 -= colormap0[pixcode];
+ cur1 -= colormap1[pixcode];
+ cur2 -= colormap2[pixcode];
}
/* Compute error fractions to be propagated to adjacent pixels.
* Add these into the running sums, and simultaneously shift the
* next-line error sums left by 1 column.
*/
- { register LOCFSERROR bnexterr;
+ {
+ register LOCFSERROR bnexterr;
bnexterr = cur0; /* Process component 0 */
- errorptr[0] = (FSERROR) (bpreverr0 + cur0 * 3);
+ errorptr[0] = (FSERROR)(bpreverr0 + cur0 * 3);
bpreverr0 = belowerr0 + cur0 * 5;
belowerr0 = bnexterr;
cur0 *= 7;
bnexterr = cur1; /* Process component 1 */
- errorptr[1] = (FSERROR) (bpreverr1 + cur1 * 3);
+ errorptr[1] = (FSERROR)(bpreverr1 + cur1 * 3);
bpreverr1 = belowerr1 + cur1 * 5;
belowerr1 = bnexterr;
cur1 *= 7;
bnexterr = cur2; /* Process component 2 */
- errorptr[2] = (FSERROR) (bpreverr2 + cur2 * 3);
+ errorptr[2] = (FSERROR)(bpreverr2 + cur2 * 3);
bpreverr2 = belowerr2 + cur2 * 5;
belowerr2 = bnexterr;
cur2 *= 7;
@@ -1051,9 +1054,9 @@ pass2_fs_dither (j_decompress_ptr cinfo,
* final fserrors[] entry. Note we need not unload belowerrN because
* it is for the dummy column before or after the actual array.
*/
- errorptr[0] = (FSERROR) bpreverr0; /* unload prev errs into array */
- errorptr[1] = (FSERROR) bpreverr1;
- errorptr[2] = (FSERROR) bpreverr2;
+ errorptr[0] = (FSERROR)bpreverr0; /* unload prev errs into array */
+ errorptr[1] = (FSERROR)bpreverr1;
+ errorptr[2] = (FSERROR)bpreverr2;
}
}
@@ -1076,31 +1079,31 @@ pass2_fs_dither (j_decompress_ptr cinfo,
*/
LOCAL(void)
-init_error_limit (j_decompress_ptr cinfo)
+init_error_limit(j_decompress_ptr cinfo)
/* Allocate and fill in the error_limiter table */
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
int *table;
int in, out;
- table = (int *) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE*2+1) * sizeof(int));
+ table = (int *)(*cinfo->mem->alloc_small)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE, (MAXJSAMPLE * 2 + 1) * sizeof(int));
table += MAXJSAMPLE; /* so can index -MAXJSAMPLE .. +MAXJSAMPLE */
cquantize->error_limiter = table;
-#define STEPSIZE ((MAXJSAMPLE+1)/16)
+#define STEPSIZE ((MAXJSAMPLE + 1) / 16)
/* Map errors 1:1 up to +- MAXJSAMPLE/16 */
out = 0;
for (in = 0; in < STEPSIZE; in++, out++) {
- table[in] = out; table[-in] = -out;
+ table[in] = out; table[-in] = -out;
}
/* Map errors 1:2 up to +- 3*MAXJSAMPLE/16 */
- for (; in < STEPSIZE*3; in++, out += (in&1) ? 0 : 1) {
- table[in] = out; table[-in] = -out;
+ for (; in < STEPSIZE * 3; in++, out += (in & 1) ? 0 : 1) {
+ table[in] = out; table[-in] = -out;
}
/* Clamp the rest to final out value (which is (MAXJSAMPLE+1)/8) */
for (; in <= MAXJSAMPLE; in++) {
- table[in] = out; table[-in] = -out;
+ table[in] = out; table[-in] = -out;
}
#undef STEPSIZE
}
@@ -1111,9 +1114,9 @@ init_error_limit (j_decompress_ptr cinfo)
*/
METHODDEF(void)
-finish_pass1 (j_decompress_ptr cinfo)
+finish_pass1(j_decompress_ptr cinfo)
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
/* Select the representative colors and fill in cinfo->colormap */
cinfo->colormap = cquantize->sv_colormap;
@@ -1124,7 +1127,7 @@ finish_pass1 (j_decompress_ptr cinfo)
METHODDEF(void)
-finish_pass2 (j_decompress_ptr cinfo)
+finish_pass2(j_decompress_ptr cinfo)
{
/* no work */
}
@@ -1135,14 +1138,14 @@ finish_pass2 (j_decompress_ptr cinfo)
*/
METHODDEF(void)
-start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
+start_pass_2_quant(j_decompress_ptr cinfo, boolean is_pre_scan)
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
hist3d histogram = cquantize->histogram;
int i;
/* Only F-S dithering or no dithering is supported. */
- /* If user asks for ordered dither, give him F-S. */
+ /* If user asks for ordered dither, give them F-S. */
if (cinfo->dither_mode != JDITHER_NONE)
cinfo->dither_mode = JDITHER_FS;
@@ -1167,14 +1170,14 @@ start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXNUMCOLORS);
if (cinfo->dither_mode == JDITHER_FS) {
- size_t arraysize = (size_t) ((cinfo->output_width + 2) *
- (3 * sizeof(FSERROR)));
+ size_t arraysize =
+ (size_t)((cinfo->output_width + 2) * (3 * sizeof(FSERROR)));
/* Allocate Floyd-Steinberg workspace if we didn't already. */
if (cquantize->fserrors == NULL)
- cquantize->fserrors = (FSERRPTR) (*cinfo->mem->alloc_large)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, arraysize);
+ cquantize->fserrors = (FSERRPTR)(*cinfo->mem->alloc_large)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE, arraysize);
/* Initialize the propagated errors to zero. */
- jzero_far((void *) cquantize->fserrors, arraysize);
+ jzero_far((void *)cquantize->fserrors, arraysize);
/* Make the error-limit table if we didn't already. */
if (cquantize->error_limiter == NULL)
init_error_limit(cinfo);
@@ -1185,8 +1188,8 @@ start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
/* Zero the histogram or inverse color map, if necessary */
if (cquantize->needs_zeroed) {
for (i = 0; i < HIST_C0_ELEMS; i++) {
- jzero_far((void *) histogram[i],
- HIST_C1_ELEMS*HIST_C2_ELEMS * sizeof(histcell));
+ jzero_far((void *)histogram[i],
+ HIST_C1_ELEMS * HIST_C2_ELEMS * sizeof(histcell));
}
cquantize->needs_zeroed = FALSE;
}
@@ -1198,9 +1201,9 @@ start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
*/
METHODDEF(void)
-new_color_map_2_quant (j_decompress_ptr cinfo)
+new_color_map_2_quant(j_decompress_ptr cinfo)
{
- my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+ my_cquantize_ptr cquantize = (my_cquantize_ptr)cinfo->cquantize;
/* Reset the inverse color map */
cquantize->needs_zeroed = TRUE;
@@ -1212,15 +1215,15 @@ new_color_map_2_quant (j_decompress_ptr cinfo)
*/
GLOBAL(void)
-jinit_2pass_quantizer (j_decompress_ptr cinfo)
+jinit_2pass_quantizer(j_decompress_ptr cinfo)
{
my_cquantize_ptr cquantize;
int i;
cquantize = (my_cquantize_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
sizeof(my_cquantizer));
- cinfo->cquantize = (struct jpeg_color_quantizer *) cquantize;
+ cinfo->cquantize = (struct jpeg_color_quantizer *)cquantize;
cquantize->pub.start_pass = start_pass_2_quant;
cquantize->pub.new_color_map = new_color_map_2_quant;
cquantize->fserrors = NULL; /* flag optional arrays not allocated */
@@ -1231,12 +1234,12 @@ jinit_2pass_quantizer (j_decompress_ptr cinfo)
ERREXIT(cinfo, JERR_NOTIMPL);
/* Allocate the histogram/inverse colormap storage */
- cquantize->histogram = (hist3d) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, HIST_C0_ELEMS * sizeof(hist2d));
+ cquantize->histogram = (hist3d)(*cinfo->mem->alloc_small)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE, HIST_C0_ELEMS * sizeof(hist2d));
for (i = 0; i < HIST_C0_ELEMS; i++) {
- cquantize->histogram[i] = (hist2d) (*cinfo->mem->alloc_large)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- HIST_C1_ELEMS*HIST_C2_ELEMS * sizeof(histcell));
+ cquantize->histogram[i] = (hist2d)(*cinfo->mem->alloc_large)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ HIST_C1_ELEMS * HIST_C2_ELEMS * sizeof(histcell));
}
cquantize->needs_zeroed = TRUE; /* histogram is garbage now */
@@ -1254,13 +1257,13 @@ jinit_2pass_quantizer (j_decompress_ptr cinfo)
if (desired > MAXNUMCOLORS)
ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXNUMCOLORS);
cquantize->sv_colormap = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo,JPOOL_IMAGE, (JDIMENSION) desired, (JDIMENSION) 3);
+ ((j_common_ptr)cinfo, JPOOL_IMAGE, (JDIMENSION)desired, (JDIMENSION)3);
cquantize->desired = desired;
} else
cquantize->sv_colormap = NULL;
/* Only F-S dithering or no dithering is supported. */
- /* If user asks for ordered dither, give him F-S. */
+ /* If user asks for ordered dither, give them F-S. */
if (cinfo->dither_mode != JDITHER_NONE)
cinfo->dither_mode = JDITHER_FS;
@@ -1271,9 +1274,9 @@ jinit_2pass_quantizer (j_decompress_ptr cinfo)
* dither_mode changes.
*/
if (cinfo->dither_mode == JDITHER_FS) {
- cquantize->fserrors = (FSERRPTR) (*cinfo->mem->alloc_large)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (size_t) ((cinfo->output_width + 2) * (3 * sizeof(FSERROR))));
+ cquantize->fserrors = (FSERRPTR)(*cinfo->mem->alloc_large)
+ ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ (size_t)((cinfo->output_width + 2) * (3 * sizeof(FSERROR))));
/* Might as well create the error-limiting table too. */
init_error_limit(cinfo);
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-09 16:32:44 +0000