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Pillow/src/libImaging/Reduce.c
Andrew Murray 46b7e86bab Format with ClangFormat
2021-01-03 14:17:51 +11:00

1484 lines
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#include "Imaging.h"
#include <math.h>
#define ROUND_UP(f) ((int)((f) >= 0.0 ? (f) + 0.5F : (f)-0.5F))
UINT32
division_UINT32(int divider, int result_bits) {
UINT32 max_dividend = (1 << result_bits) * divider;
float max_int = (1 << 30) * 4.0;
return (UINT32)(max_int / max_dividend);
}
void
ImagingReduceNxN(Imaging imOut, Imaging imIn, int box[4], int xscale, int yscale) {
/* The most general implementation for any xscale and yscale
*/
int x, y, xx, yy;
UINT32 multiplier = division_UINT32(yscale * xscale, 8);
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 ss = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image8[yy];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss += line0[xx + 0] + line0[xx + 1] + line1[xx + 0] +
line1[xx + 1];
}
if (xscale & 0x01) {
ss += line0[xx + 0] + line1[xx + 0];
}
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image8[yy];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss += line[xx + 0] + line[xx + 1];
}
if (xscale & 0x01) {
ss += line[xx + 0];
}
}
imOut->image8[y][x] = (ss * multiplier) >> 24;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss3 = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image[yy];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line0[xx * 4 + 0] + line0[xx * 4 + 4] +
line1[xx * 4 + 0] + line1[xx * 4 + 4];
ss3 += line0[xx * 4 + 3] + line0[xx * 4 + 7] +
line1[xx * 4 + 3] + line1[xx * 4 + 7];
}
if (xscale & 0x01) {
ss0 += line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss3 += line0[xx * 4 + 3] + line1[xx * 4 + 3];
}
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image[yy];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line[xx * 4 + 0] + line[xx * 4 + 4];
ss3 += line[xx * 4 + 3] + line[xx * 4 + 7];
}
if (xscale & 0x01) {
ss0 += line[xx * 4 + 0];
ss3 += line[xx * 4 + 3];
}
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24, 0, 0, (ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image[yy];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line0[xx * 4 + 0] + line0[xx * 4 + 4] +
line1[xx * 4 + 0] + line1[xx * 4 + 4];
ss1 += line0[xx * 4 + 1] + line0[xx * 4 + 5] +
line1[xx * 4 + 1] + line1[xx * 4 + 5];
ss2 += line0[xx * 4 + 2] + line0[xx * 4 + 6] +
line1[xx * 4 + 2] + line1[xx * 4 + 6];
}
if (xscale & 0x01) {
ss0 += line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss1 += line0[xx * 4 + 1] + line1[xx * 4 + 1];
ss2 += line0[xx * 4 + 2] + line1[xx * 4 + 2];
}
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image[yy];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line[xx * 4 + 0] + line[xx * 4 + 4];
ss1 += line[xx * 4 + 1] + line[xx * 4 + 5];
ss2 += line[xx * 4 + 2] + line[xx * 4 + 6];
}
if (xscale & 0x01) {
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
}
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend, ss3 = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image[yy];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line0[xx * 4 + 0] + line0[xx * 4 + 4] +
line1[xx * 4 + 0] + line1[xx * 4 + 4];
ss1 += line0[xx * 4 + 1] + line0[xx * 4 + 5] +
line1[xx * 4 + 1] + line1[xx * 4 + 5];
ss2 += line0[xx * 4 + 2] + line0[xx * 4 + 6] +
line1[xx * 4 + 2] + line1[xx * 4 + 6];
ss3 += line0[xx * 4 + 3] + line0[xx * 4 + 7] +
line1[xx * 4 + 3] + line1[xx * 4 + 7];
}
if (xscale & 0x01) {
ss0 += line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss1 += line0[xx * 4 + 1] + line1[xx * 4 + 1];
ss2 += line0[xx * 4 + 2] + line1[xx * 4 + 2];
ss3 += line0[xx * 4 + 3] + line1[xx * 4 + 3];
}
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image[yy];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line[xx * 4 + 0] + line[xx * 4 + 4];
ss1 += line[xx * 4 + 1] + line[xx * 4 + 5];
ss2 += line[xx * 4 + 2] + line[xx * 4 + 6];
ss3 += line[xx * 4 + 3] + line[xx * 4 + 7];
}
if (xscale & 0x01) {
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
ss3 += line[xx * 4 + 3];
}
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
(ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce1xN(Imaging imOut, Imaging imIn, int box[4], int yscale) {
/* Optimized implementation for xscale = 1.
*/
int x, y, yy;
int xscale = 1;
UINT32 multiplier = division_UINT32(yscale * xscale, 8);
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 ss = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image8[yy];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
ss += line0[xx + 0] + line1[xx + 0];
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image8[yy];
ss += line[xx + 0];
}
imOut->image8[y][x] = (ss * multiplier) >> 24;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss3 = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image[yy];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
ss0 += line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss3 += line0[xx * 4 + 3] + line1[xx * 4 + 3];
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image[yy];
ss0 += line[xx * 4 + 0];
ss3 += line[xx * 4 + 3];
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24, 0, 0, (ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image[yy];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
ss0 += line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss1 += line0[xx * 4 + 1] + line1[xx * 4 + 1];
ss2 += line0[xx * 4 + 2] + line1[xx * 4 + 2];
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image[yy];
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend, ss3 = amend;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
UINT8 *line0 = (UINT8 *)imIn->image[yy];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
ss0 += line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss1 += line0[xx * 4 + 1] + line1[xx * 4 + 1];
ss2 += line0[xx * 4 + 2] + line1[xx * 4 + 2];
ss3 += line0[xx * 4 + 3] + line1[xx * 4 + 3];
}
if (yscale & 0x01) {
UINT8 *line = (UINT8 *)imIn->image[yy];
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
ss3 += line[xx * 4 + 3];
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
(ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduceNx1(Imaging imOut, Imaging imIn, int box[4], int xscale) {
/* Optimized implementation for yscale = 1.
*/
int x, y, xx;
int yscale = 1;
UINT32 multiplier = division_UINT32(yscale * xscale, 8);
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line = (UINT8 *)imIn->image8[yy];
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 ss = amend;
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss += line[xx + 0] + line[xx + 1];
}
if (xscale & 0x01) {
ss += line[xx + 0];
}
imOut->image8[y][x] = (ss * multiplier) >> 24;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line = (UINT8 *)imIn->image[yy];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss3 = amend;
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line[xx * 4 + 0] + line[xx * 4 + 4];
ss3 += line[xx * 4 + 3] + line[xx * 4 + 7];
}
if (xscale & 0x01) {
ss0 += line[xx * 4 + 0];
ss3 += line[xx * 4 + 3];
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24, 0, 0, (ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend;
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line[xx * 4 + 0] + line[xx * 4 + 4];
ss1 += line[xx * 4 + 1] + line[xx * 4 + 5];
ss2 += line[xx * 4 + 2] + line[xx * 4 + 6];
}
if (xscale & 0x01) {
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend, ss3 = amend;
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss0 += line[xx * 4 + 0] + line[xx * 4 + 4];
ss1 += line[xx * 4 + 1] + line[xx * 4 + 5];
ss2 += line[xx * 4 + 2] + line[xx * 4 + 6];
ss3 += line[xx * 4 + 3] + line[xx * 4 + 7];
}
if (xscale & 0x01) {
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
ss3 += line[xx * 4 + 3];
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
(ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce1x2(Imaging imOut, Imaging imIn, int box[4]) {
/* Optimized implementation for xscale = 1 and yscale = 2.
*/
int xscale = 1, yscale = 2;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line1[xx + 0];
imOut->image8[y][x] = (ss0 + amend) >> 1;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss3 = line0[xx * 4 + 3] + line1[xx * 4 + 3];
v = MAKE_UINT32((ss0 + amend) >> 1, 0, 0, (ss3 + amend) >> 1);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss1 = line0[xx * 4 + 1] + line1[xx * 4 + 1];
ss2 = line0[xx * 4 + 2] + line1[xx * 4 + 2];
v = MAKE_UINT32(
(ss0 + amend) >> 1, (ss1 + amend) >> 1, (ss2 + amend) >> 1, 0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line1[xx * 4 + 0];
ss1 = line0[xx * 4 + 1] + line1[xx * 4 + 1];
ss2 = line0[xx * 4 + 2] + line1[xx * 4 + 2];
ss3 = line0[xx * 4 + 3] + line1[xx * 4 + 3];
v = MAKE_UINT32(
(ss0 + amend) >> 1,
(ss1 + amend) >> 1,
(ss2 + amend) >> 1,
(ss3 + amend) >> 1);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce2x1(Imaging imOut, Imaging imIn, int box[4]) {
/* Optimized implementation for xscale = 2 and yscale = 1.
*/
int xscale = 2, yscale = 1;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line0[xx + 1];
imOut->image8[y][x] = (ss0 + amend) >> 1;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7];
v = MAKE_UINT32((ss0 + amend) >> 1, 0, 0, (ss3 + amend) >> 1);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6];
v = MAKE_UINT32(
(ss0 + amend) >> 1, (ss1 + amend) >> 1, (ss2 + amend) >> 1, 0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7];
v = MAKE_UINT32(
(ss0 + amend) >> 1,
(ss1 + amend) >> 1,
(ss2 + amend) >> 1,
(ss3 + amend) >> 1);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce2x2(Imaging imOut, Imaging imIn, int box[4]) {
/* Optimized implementation for xscale = 2 and yscale = 2.
*/
int xscale = 2, yscale = 2;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line0[xx + 1] + line1[xx + 0] + line1[xx + 1];
imOut->image8[y][x] = (ss0 + amend) >> 2;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line1[xx * 4 + 0] +
line1[xx * 4 + 4];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line1[xx * 4 + 3] +
line1[xx * 4 + 7];
v = MAKE_UINT32((ss0 + amend) >> 2, 0, 0, (ss3 + amend) >> 2);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line1[xx * 4 + 0] +
line1[xx * 4 + 4];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line1[xx * 4 + 1] +
line1[xx * 4 + 5];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line1[xx * 4 + 2] +
line1[xx * 4 + 6];
v = MAKE_UINT32(
(ss0 + amend) >> 2, (ss1 + amend) >> 2, (ss2 + amend) >> 2, 0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line1[xx * 4 + 0] +
line1[xx * 4 + 4];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line1[xx * 4 + 1] +
line1[xx * 4 + 5];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line1[xx * 4 + 2] +
line1[xx * 4 + 6];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line1[xx * 4 + 3] +
line1[xx * 4 + 7];
v = MAKE_UINT32(
(ss0 + amend) >> 2,
(ss1 + amend) >> 2,
(ss2 + amend) >> 2,
(ss3 + amend) >> 2);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce1x3(Imaging imOut, Imaging imIn, int box[4]) {
/* Optimized implementation for xscale = 1 and yscale = 3.
*/
int xscale = 1, yscale = 3;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 multiplier = division_UINT32(yscale * xscale, 8);
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image8[yy + 2];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line1[xx + 0] + line2[xx + 0];
imOut->image8[y][x] = ((ss0 + amend) * multiplier) >> 24;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image[yy + 2];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line1[xx * 4 + 0] + line2[xx * 4 + 0];
ss3 = line0[xx * 4 + 3] + line1[xx * 4 + 3] + line2[xx * 4 + 3];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
0,
0,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line1[xx * 4 + 0] + line2[xx * 4 + 0];
ss1 = line0[xx * 4 + 1] + line1[xx * 4 + 1] + line2[xx * 4 + 1];
ss2 = line0[xx * 4 + 2] + line1[xx * 4 + 2] + line2[xx * 4 + 2];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line1[xx * 4 + 0] + line2[xx * 4 + 0];
ss1 = line0[xx * 4 + 1] + line1[xx * 4 + 1] + line2[xx * 4 + 1];
ss2 = line0[xx * 4 + 2] + line1[xx * 4 + 2] + line2[xx * 4 + 2];
ss3 = line0[xx * 4 + 3] + line1[xx * 4 + 3] + line2[xx * 4 + 3];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce3x1(Imaging imOut, Imaging imIn, int box[4]) {
/* Optimized implementation for xscale = 3 and yscale = 1.
*/
int xscale = 3, yscale = 1;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 multiplier = division_UINT32(yscale * xscale, 8);
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line0[xx + 1] + line0[xx + 2];
imOut->image8[y][x] = ((ss0 + amend) * multiplier) >> 24;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
0,
0,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce3x3(Imaging imOut, Imaging imIn, int box[4]) {
/* Optimized implementation for xscale = 3 and yscale = 3.
*/
int xscale = 3, yscale = 3;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 multiplier = division_UINT32(yscale * xscale, 8);
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image8[yy + 2];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line0[xx + 1] + line0[xx + 2] + line1[xx + 0] +
line1[xx + 1] + line1[xx + 2] + line2[xx + 0] + line2[xx + 1] +
line2[xx + 2];
imOut->image8[y][x] = ((ss0 + amend) * multiplier) >> 24;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image[yy + 2];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line1[xx * 4 + 0] + line1[xx * 4 + 4] + line1[xx * 4 + 8] +
line2[xx * 4 + 0] + line2[xx * 4 + 4] + line2[xx * 4 + 8];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11] +
line1[xx * 4 + 3] + line1[xx * 4 + 7] + line1[xx * 4 + 11] +
line2[xx * 4 + 3] + line2[xx * 4 + 7] + line2[xx * 4 + 11];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
0,
0,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line1[xx * 4 + 0] + line1[xx * 4 + 4] + line1[xx * 4 + 8] +
line2[xx * 4 + 0] + line2[xx * 4 + 4] + line2[xx * 4 + 8];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9] +
line1[xx * 4 + 1] + line1[xx * 4 + 5] + line1[xx * 4 + 9] +
line2[xx * 4 + 1] + line2[xx * 4 + 5] + line2[xx * 4 + 9];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10] +
line1[xx * 4 + 2] + line1[xx * 4 + 6] + line1[xx * 4 + 10] +
line2[xx * 4 + 2] + line2[xx * 4 + 6] + line2[xx * 4 + 10];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line1[xx * 4 + 0] + line1[xx * 4 + 4] + line1[xx * 4 + 8] +
line2[xx * 4 + 0] + line2[xx * 4 + 4] + line2[xx * 4 + 8];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9] +
line1[xx * 4 + 1] + line1[xx * 4 + 5] + line1[xx * 4 + 9] +
line2[xx * 4 + 1] + line2[xx * 4 + 5] + line2[xx * 4 + 9];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10] +
line1[xx * 4 + 2] + line1[xx * 4 + 6] + line1[xx * 4 + 10] +
line2[xx * 4 + 2] + line2[xx * 4 + 6] + line2[xx * 4 + 10];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11] +
line1[xx * 4 + 3] + line1[xx * 4 + 7] + line1[xx * 4 + 11] +
line2[xx * 4 + 3] + line2[xx * 4 + 7] + line2[xx * 4 + 11];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce4x4(Imaging imOut, Imaging imIn, int box[4]) {
/* Optimized implementation for xscale = 4 and yscale = 4.
*/
int xscale = 4, yscale = 4;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image8[yy + 2];
UINT8 *line3 = (UINT8 *)imIn->image8[yy + 3];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line0[xx + 1] + line0[xx + 2] + line0[xx + 3] +
line1[xx + 0] + line1[xx + 1] + line1[xx + 2] + line1[xx + 3] +
line2[xx + 0] + line2[xx + 1] + line2[xx + 2] + line2[xx + 3] +
line3[xx + 0] + line3[xx + 1] + line3[xx + 2] + line3[xx + 3];
imOut->image8[y][x] = (ss0 + amend) >> 4;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image[yy + 2];
UINT8 *line3 = (UINT8 *)imIn->image[yy + 3];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line0[xx * 4 + 12] + line1[xx * 4 + 0] + line1[xx * 4 + 4] +
line1[xx * 4 + 8] + line1[xx * 4 + 12] + line2[xx * 4 + 0] +
line2[xx * 4 + 4] + line2[xx * 4 + 8] + line2[xx * 4 + 12] +
line3[xx * 4 + 0] + line3[xx * 4 + 4] + line3[xx * 4 + 8] +
line3[xx * 4 + 12];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11] +
line0[xx * 4 + 15] + line1[xx * 4 + 3] + line1[xx * 4 + 7] +
line1[xx * 4 + 11] + line1[xx * 4 + 15] + line2[xx * 4 + 3] +
line2[xx * 4 + 7] + line2[xx * 4 + 11] + line2[xx * 4 + 15] +
line3[xx * 4 + 3] + line3[xx * 4 + 7] + line3[xx * 4 + 11] +
line3[xx * 4 + 15];
v = MAKE_UINT32((ss0 + amend) >> 4, 0, 0, (ss3 + amend) >> 4);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line0[xx * 4 + 12] + line1[xx * 4 + 0] + line1[xx * 4 + 4] +
line1[xx * 4 + 8] + line1[xx * 4 + 12] + line2[xx * 4 + 0] +
line2[xx * 4 + 4] + line2[xx * 4 + 8] + line2[xx * 4 + 12] +
line3[xx * 4 + 0] + line3[xx * 4 + 4] + line3[xx * 4 + 8] +
line3[xx * 4 + 12];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9] +
line0[xx * 4 + 13] + line1[xx * 4 + 1] + line1[xx * 4 + 5] +
line1[xx * 4 + 9] + line1[xx * 4 + 13] + line2[xx * 4 + 1] +
line2[xx * 4 + 5] + line2[xx * 4 + 9] + line2[xx * 4 + 13] +
line3[xx * 4 + 1] + line3[xx * 4 + 5] + line3[xx * 4 + 9] +
line3[xx * 4 + 13];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10] +
line0[xx * 4 + 14] + line1[xx * 4 + 2] + line1[xx * 4 + 6] +
line1[xx * 4 + 10] + line1[xx * 4 + 14] + line2[xx * 4 + 2] +
line2[xx * 4 + 6] + line2[xx * 4 + 10] + line2[xx * 4 + 14] +
line3[xx * 4 + 2] + line3[xx * 4 + 6] + line3[xx * 4 + 10] +
line3[xx * 4 + 14];
v = MAKE_UINT32(
(ss0 + amend) >> 4, (ss1 + amend) >> 4, (ss2 + amend) >> 4, 0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line0[xx * 4 + 12] + line1[xx * 4 + 0] + line1[xx * 4 + 4] +
line1[xx * 4 + 8] + line1[xx * 4 + 12] + line2[xx * 4 + 0] +
line2[xx * 4 + 4] + line2[xx * 4 + 8] + line2[xx * 4 + 12] +
line3[xx * 4 + 0] + line3[xx * 4 + 4] + line3[xx * 4 + 8] +
line3[xx * 4 + 12];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9] +
line0[xx * 4 + 13] + line1[xx * 4 + 1] + line1[xx * 4 + 5] +
line1[xx * 4 + 9] + line1[xx * 4 + 13] + line2[xx * 4 + 1] +
line2[xx * 4 + 5] + line2[xx * 4 + 9] + line2[xx * 4 + 13] +
line3[xx * 4 + 1] + line3[xx * 4 + 5] + line3[xx * 4 + 9] +
line3[xx * 4 + 13];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10] +
line0[xx * 4 + 14] + line1[xx * 4 + 2] + line1[xx * 4 + 6] +
line1[xx * 4 + 10] + line1[xx * 4 + 14] + line2[xx * 4 + 2] +
line2[xx * 4 + 6] + line2[xx * 4 + 10] + line2[xx * 4 + 14] +
line3[xx * 4 + 2] + line3[xx * 4 + 6] + line3[xx * 4 + 10] +
line3[xx * 4 + 14];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11] +
line0[xx * 4 + 15] + line1[xx * 4 + 3] + line1[xx * 4 + 7] +
line1[xx * 4 + 11] + line1[xx * 4 + 15] + line2[xx * 4 + 3] +
line2[xx * 4 + 7] + line2[xx * 4 + 11] + line2[xx * 4 + 15] +
line3[xx * 4 + 3] + line3[xx * 4 + 7] + line3[xx * 4 + 11] +
line3[xx * 4 + 15];
v = MAKE_UINT32(
(ss0 + amend) >> 4,
(ss1 + amend) >> 4,
(ss2 + amend) >> 4,
(ss3 + amend) >> 4);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduce5x5(Imaging imOut, Imaging imIn, int box[4]) {
/* Fast special case for xscale = 5 and yscale = 5.
*/
int xscale = 5, yscale = 5;
int x, y;
UINT32 ss0, ss1, ss2, ss3;
UINT32 multiplier = division_UINT32(yscale * xscale, 8);
UINT32 amend = yscale * xscale / 2;
if (imIn->image8) {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image8[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image8[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image8[yy + 2];
UINT8 *line3 = (UINT8 *)imIn->image8[yy + 3];
UINT8 *line4 = (UINT8 *)imIn->image8[yy + 4];
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
ss0 = line0[xx + 0] + line0[xx + 1] + line0[xx + 2] + line0[xx + 3] +
line0[xx + 4] + line1[xx + 0] + line1[xx + 1] + line1[xx + 2] +
line1[xx + 3] + line1[xx + 4] + line2[xx + 0] + line2[xx + 1] +
line2[xx + 2] + line2[xx + 3] + line2[xx + 4] + line3[xx + 0] +
line3[xx + 1] + line3[xx + 2] + line3[xx + 3] + line3[xx + 4] +
line4[xx + 0] + line4[xx + 1] + line4[xx + 2] + line4[xx + 3] +
line4[xx + 4];
imOut->image8[y][x] = ((ss0 + amend) * multiplier) >> 24;
}
}
} else {
for (y = 0; y < box[3] / yscale; y++) {
int yy = box[1] + y * yscale;
UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
UINT8 *line2 = (UINT8 *)imIn->image[yy + 2];
UINT8 *line3 = (UINT8 *)imIn->image[yy + 3];
UINT8 *line4 = (UINT8 *)imIn->image[yy + 4];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line0[xx * 4 + 12] + line0[xx * 4 + 16] + line1[xx * 4 + 0] +
line1[xx * 4 + 4] + line1[xx * 4 + 8] + line1[xx * 4 + 12] +
line1[xx * 4 + 16] + line2[xx * 4 + 0] + line2[xx * 4 + 4] +
line2[xx * 4 + 8] + line2[xx * 4 + 12] + line2[xx * 4 + 16] +
line3[xx * 4 + 0] + line3[xx * 4 + 4] + line3[xx * 4 + 8] +
line3[xx * 4 + 12] + line3[xx * 4 + 16] + line4[xx * 4 + 0] +
line4[xx * 4 + 4] + line4[xx * 4 + 8] + line4[xx * 4 + 12] +
line4[xx * 4 + 16];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11] +
line0[xx * 4 + 15] + line0[xx * 4 + 19] + line1[xx * 4 + 3] +
line1[xx * 4 + 7] + line1[xx * 4 + 11] + line1[xx * 4 + 15] +
line1[xx * 4 + 19] + line2[xx * 4 + 3] + line2[xx * 4 + 7] +
line2[xx * 4 + 11] + line2[xx * 4 + 15] + line2[xx * 4 + 19] +
line3[xx * 4 + 3] + line3[xx * 4 + 7] + line3[xx * 4 + 11] +
line3[xx * 4 + 15] + line3[xx * 4 + 19] + line4[xx * 4 + 3] +
line4[xx * 4 + 7] + line4[xx * 4 + 11] + line4[xx * 4 + 15] +
line4[xx * 4 + 19];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
0,
0,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else if (imIn->bands == 3) {
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line0[xx * 4 + 12] + line0[xx * 4 + 16] + line1[xx * 4 + 0] +
line1[xx * 4 + 4] + line1[xx * 4 + 8] + line1[xx * 4 + 12] +
line1[xx * 4 + 16] + line2[xx * 4 + 0] + line2[xx * 4 + 4] +
line2[xx * 4 + 8] + line2[xx * 4 + 12] + line2[xx * 4 + 16] +
line3[xx * 4 + 0] + line3[xx * 4 + 4] + line3[xx * 4 + 8] +
line3[xx * 4 + 12] + line3[xx * 4 + 16] + line4[xx * 4 + 0] +
line4[xx * 4 + 4] + line4[xx * 4 + 8] + line4[xx * 4 + 12] +
line4[xx * 4 + 16];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9] +
line0[xx * 4 + 13] + line0[xx * 4 + 17] + line1[xx * 4 + 1] +
line1[xx * 4 + 5] + line1[xx * 4 + 9] + line1[xx * 4 + 13] +
line1[xx * 4 + 17] + line2[xx * 4 + 1] + line2[xx * 4 + 5] +
line2[xx * 4 + 9] + line2[xx * 4 + 13] + line2[xx * 4 + 17] +
line3[xx * 4 + 1] + line3[xx * 4 + 5] + line3[xx * 4 + 9] +
line3[xx * 4 + 13] + line3[xx * 4 + 17] + line4[xx * 4 + 1] +
line4[xx * 4 + 5] + line4[xx * 4 + 9] + line4[xx * 4 + 13] +
line4[xx * 4 + 17];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10] +
line0[xx * 4 + 14] + line0[xx * 4 + 18] + line1[xx * 4 + 2] +
line1[xx * 4 + 6] + line1[xx * 4 + 10] + line1[xx * 4 + 14] +
line1[xx * 4 + 18] + line2[xx * 4 + 2] + line2[xx * 4 + 6] +
line2[xx * 4 + 10] + line2[xx * 4 + 14] + line2[xx * 4 + 18] +
line3[xx * 4 + 2] + line3[xx * 4 + 6] + line3[xx * 4 + 10] +
line3[xx * 4 + 14] + line3[xx * 4 + 18] + line4[xx * 4 + 2] +
line4[xx * 4 + 6] + line4[xx * 4 + 10] + line4[xx * 4 + 14] +
line4[xx * 4 + 18];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
0);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
} else { // bands == 4
for (x = 0; x < box[2] / xscale; x++) {
int xx = box[0] + x * xscale;
UINT32 v;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
line0[xx * 4 + 12] + line0[xx * 4 + 16] + line1[xx * 4 + 0] +
line1[xx * 4 + 4] + line1[xx * 4 + 8] + line1[xx * 4 + 12] +
line1[xx * 4 + 16] + line2[xx * 4 + 0] + line2[xx * 4 + 4] +
line2[xx * 4 + 8] + line2[xx * 4 + 12] + line2[xx * 4 + 16] +
line3[xx * 4 + 0] + line3[xx * 4 + 4] + line3[xx * 4 + 8] +
line3[xx * 4 + 12] + line3[xx * 4 + 16] + line4[xx * 4 + 0] +
line4[xx * 4 + 4] + line4[xx * 4 + 8] + line4[xx * 4 + 12] +
line4[xx * 4 + 16];
ss1 = line0[xx * 4 + 1] + line0[xx * 4 + 5] + line0[xx * 4 + 9] +
line0[xx * 4 + 13] + line0[xx * 4 + 17] + line1[xx * 4 + 1] +
line1[xx * 4 + 5] + line1[xx * 4 + 9] + line1[xx * 4 + 13] +
line1[xx * 4 + 17] + line2[xx * 4 + 1] + line2[xx * 4 + 5] +
line2[xx * 4 + 9] + line2[xx * 4 + 13] + line2[xx * 4 + 17] +
line3[xx * 4 + 1] + line3[xx * 4 + 5] + line3[xx * 4 + 9] +
line3[xx * 4 + 13] + line3[xx * 4 + 17] + line4[xx * 4 + 1] +
line4[xx * 4 + 5] + line4[xx * 4 + 9] + line4[xx * 4 + 13] +
line4[xx * 4 + 17];
ss2 = line0[xx * 4 + 2] + line0[xx * 4 + 6] + line0[xx * 4 + 10] +
line0[xx * 4 + 14] + line0[xx * 4 + 18] + line1[xx * 4 + 2] +
line1[xx * 4 + 6] + line1[xx * 4 + 10] + line1[xx * 4 + 14] +
line1[xx * 4 + 18] + line2[xx * 4 + 2] + line2[xx * 4 + 6] +
line2[xx * 4 + 10] + line2[xx * 4 + 14] + line2[xx * 4 + 18] +
line3[xx * 4 + 2] + line3[xx * 4 + 6] + line3[xx * 4 + 10] +
line3[xx * 4 + 14] + line3[xx * 4 + 18] + line4[xx * 4 + 2] +
line4[xx * 4 + 6] + line4[xx * 4 + 10] + line4[xx * 4 + 14] +
line4[xx * 4 + 18];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11] +
line0[xx * 4 + 15] + line0[xx * 4 + 19] + line1[xx * 4 + 3] +
line1[xx * 4 + 7] + line1[xx * 4 + 11] + line1[xx * 4 + 15] +
line1[xx * 4 + 19] + line2[xx * 4 + 3] + line2[xx * 4 + 7] +
line2[xx * 4 + 11] + line2[xx * 4 + 15] + line2[xx * 4 + 19] +
line3[xx * 4 + 3] + line3[xx * 4 + 7] + line3[xx * 4 + 11] +
line3[xx * 4 + 15] + line3[xx * 4 + 19] + line4[xx * 4 + 3] +
line4[xx * 4 + 7] + line4[xx * 4 + 11] + line4[xx * 4 + 15] +
line4[xx * 4 + 19];
v = MAKE_UINT32(
((ss0 + amend) * multiplier) >> 24,
((ss1 + amend) * multiplier) >> 24,
((ss2 + amend) * multiplier) >> 24,
((ss3 + amend) * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
}
}
void
ImagingReduceCorners(Imaging imOut, Imaging imIn, int box[4], int xscale, int yscale) {
/* Fill the last row and the last column for any xscale and yscale.
*/
int x, y, xx, yy;
if (imIn->image8) {
if (box[2] % xscale) {
int scale = (box[2] % xscale) * yscale;
UINT32 multiplier = division_UINT32(scale, 8);
UINT32 amend = scale / 2;
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
UINT32 ss = amend;
x = box[2] / xscale;
for (yy = yy_from; yy < yy_from + yscale; yy++) {
UINT8 *line = (UINT8 *)imIn->image8[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss += line[xx + 0];
}
}
imOut->image8[y][x] = (ss * multiplier) >> 24;
}
}
if (box[3] % yscale) {
int scale = xscale * (box[3] % yscale);
UINT32 multiplier = division_UINT32(scale, 8);
UINT32 amend = scale / 2;
y = box[3] / yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 ss = amend;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
UINT8 *line = (UINT8 *)imIn->image8[yy];
for (xx = xx_from; xx < xx_from + xscale; xx++) {
ss += line[xx + 0];
}
}
imOut->image8[y][x] = (ss * multiplier) >> 24;
}
}
if (box[2] % xscale && box[3] % yscale) {
int scale = (box[2] % xscale) * (box[3] % yscale);
UINT32 multiplier = division_UINT32(scale, 8);
UINT32 amend = scale / 2;
UINT32 ss = amend;
x = box[2] / xscale;
y = box[3] / yscale;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
UINT8 *line = (UINT8 *)imIn->image8[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss += line[xx + 0];
}
}
imOut->image8[y][x] = (ss * multiplier) >> 24;
}
} else {
if (box[2] % xscale) {
int scale = (box[2] % xscale) * yscale;
UINT32 multiplier = division_UINT32(scale, 8);
UINT32 amend = scale / 2;
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend, ss3 = amend;
x = box[2] / xscale;
for (yy = yy_from; yy < yy_from + yscale; yy++) {
UINT8 *line = (UINT8 *)imIn->image[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
ss3 += line[xx * 4 + 3];
}
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
(ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
if (box[3] % yscale) {
int scale = xscale * (box[3] % yscale);
UINT32 multiplier = division_UINT32(scale, 8);
UINT32 amend = scale / 2;
y = box[3] / yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend, ss3 = amend;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
UINT8 *line = (UINT8 *)imIn->image[yy];
for (xx = xx_from; xx < xx_from + xscale; xx++) {
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
ss3 += line[xx * 4 + 3];
}
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
(ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
if (box[2] % xscale && box[3] % yscale) {
int scale = (box[2] % xscale) * (box[3] % yscale);
UINT32 multiplier = division_UINT32(scale, 8);
UINT32 amend = scale / 2;
UINT32 v;
UINT32 ss0 = amend, ss1 = amend, ss2 = amend, ss3 = amend;
x = box[2] / xscale;
y = box[3] / yscale;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
UINT8 *line = (UINT8 *)imIn->image[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss0 += line[xx * 4 + 0];
ss1 += line[xx * 4 + 1];
ss2 += line[xx * 4 + 2];
ss3 += line[xx * 4 + 3];
}
}
v = MAKE_UINT32(
(ss0 * multiplier) >> 24,
(ss1 * multiplier) >> 24,
(ss2 * multiplier) >> 24,
(ss3 * multiplier) >> 24);
memcpy(imOut->image[y] + x * sizeof(v), &v, sizeof(v));
}
}
}
void
ImagingReduceNxN_32bpc(
Imaging imOut, Imaging imIn, int box[4], int xscale, int yscale) {
/* The most general implementation for any xscale and yscale
*/
int x, y, xx, yy;
double multiplier = 1.0 / (yscale * xscale);
switch (imIn->type) {
case IMAGING_TYPE_INT32:
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
double ss = 0;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
INT32 *line0 = (INT32 *)imIn->image32[yy];
INT32 *line1 = (INT32 *)imIn->image32[yy + 1];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss += line0[xx + 0] + line0[xx + 1] + line1[xx + 0] +
line1[xx + 1];
}
if (xscale & 0x01) {
ss += line0[xx + 0] + line1[xx + 0];
}
}
if (yscale & 0x01) {
INT32 *line = (INT32 *)imIn->image32[yy];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss += line[xx + 0] + line[xx + 1];
}
if (xscale & 0x01) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_I(imOut, x, y) = ROUND_UP(ss * multiplier);
}
}
break;
case IMAGING_TYPE_FLOAT32:
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
double ss = 0;
for (yy = yy_from; yy < yy_from + yscale - 1; yy += 2) {
FLOAT32 *line0 = (FLOAT32 *)imIn->image32[yy];
FLOAT32 *line1 = (FLOAT32 *)imIn->image32[yy + 1];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss += line0[xx + 0] + line0[xx + 1] + line1[xx + 0] +
line1[xx + 1];
}
if (xscale & 0x01) {
ss += line0[xx + 0] + line1[xx + 0];
}
}
if (yscale & 0x01) {
FLOAT32 *line = (FLOAT32 *)imIn->image32[yy];
for (xx = xx_from; xx < xx_from + xscale - 1; xx += 2) {
ss += line[xx + 0] + line[xx + 1];
}
if (xscale & 0x01) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_F(imOut, x, y) = ss * multiplier;
}
}
break;
}
}
void
ImagingReduceCorners_32bpc(
Imaging imOut, Imaging imIn, int box[4], int xscale, int yscale) {
/* Fill the last row and the last column for any xscale and yscale.
*/
int x, y, xx, yy;
switch (imIn->type) {
case IMAGING_TYPE_INT32:
if (box[2] % xscale) {
double multiplier = 1.0 / ((box[2] % xscale) * yscale);
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
double ss = 0;
x = box[2] / xscale;
for (yy = yy_from; yy < yy_from + yscale; yy++) {
INT32 *line = (INT32 *)imIn->image32[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_I(imOut, x, y) = ROUND_UP(ss * multiplier);
}
}
if (box[3] % yscale) {
double multiplier = 1.0 / (xscale * (box[3] % yscale));
y = box[3] / yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
double ss = 0;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
INT32 *line = (INT32 *)imIn->image32[yy];
for (xx = xx_from; xx < xx_from + xscale; xx++) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_I(imOut, x, y) = ROUND_UP(ss * multiplier);
}
}
if (box[2] % xscale && box[3] % yscale) {
double multiplier = 1.0 / ((box[2] % xscale) * (box[3] % yscale));
double ss = 0;
x = box[2] / xscale;
y = box[3] / yscale;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
INT32 *line = (INT32 *)imIn->image32[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_I(imOut, x, y) = ROUND_UP(ss * multiplier);
}
break;
case IMAGING_TYPE_FLOAT32:
if (box[2] % xscale) {
double multiplier = 1.0 / ((box[2] % xscale) * yscale);
for (y = 0; y < box[3] / yscale; y++) {
int yy_from = box[1] + y * yscale;
double ss = 0;
x = box[2] / xscale;
for (yy = yy_from; yy < yy_from + yscale; yy++) {
FLOAT32 *line = (FLOAT32 *)imIn->image32[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_F(imOut, x, y) = ss * multiplier;
}
}
if (box[3] % yscale) {
double multiplier = 1.0 / (xscale * (box[3] % yscale));
y = box[3] / yscale;
for (x = 0; x < box[2] / xscale; x++) {
int xx_from = box[0] + x * xscale;
double ss = 0;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
FLOAT32 *line = (FLOAT32 *)imIn->image32[yy];
for (xx = xx_from; xx < xx_from + xscale; xx++) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_F(imOut, x, y) = ss * multiplier;
}
}
if (box[2] % xscale && box[3] % yscale) {
double multiplier = 1.0 / ((box[2] % xscale) * (box[3] % yscale));
double ss = 0;
x = box[2] / xscale;
y = box[3] / yscale;
for (yy = box[1] + y * yscale; yy < box[1] + box[3]; yy++) {
FLOAT32 *line = (FLOAT32 *)imIn->image32[yy];
for (xx = box[0] + x * xscale; xx < box[0] + box[2]; xx++) {
ss += line[xx + 0];
}
}
IMAGING_PIXEL_F(imOut, x, y) = ss * multiplier;
}
break;
}
}
Imaging
ImagingReduce(Imaging imIn, int xscale, int yscale, int box[4]) {
ImagingSectionCookie cookie;
Imaging imOut = NULL;
if (strcmp(imIn->mode, "P") == 0 || strcmp(imIn->mode, "1") == 0) {
return (Imaging)ImagingError_ModeError();
}
if (imIn->type == IMAGING_TYPE_SPECIAL) {
return (Imaging)ImagingError_ModeError();
}
imOut = ImagingNewDirty(
imIn->mode, (box[2] + xscale - 1) / xscale, (box[3] + yscale - 1) / yscale);
if (!imOut) {
return NULL;
}
ImagingSectionEnter(&cookie);
switch (imIn->type) {
case IMAGING_TYPE_UINT8:
if (xscale == 1) {
if (yscale == 2) {
ImagingReduce1x2(imOut, imIn, box);
} else if (yscale == 3) {
ImagingReduce1x3(imOut, imIn, box);
} else {
ImagingReduce1xN(imOut, imIn, box, yscale);
}
} else if (yscale == 1) {
if (xscale == 2) {
ImagingReduce2x1(imOut, imIn, box);
} else if (xscale == 3) {
ImagingReduce3x1(imOut, imIn, box);
} else {
ImagingReduceNx1(imOut, imIn, box, xscale);
}
} else if (xscale == yscale && xscale <= 5) {
if (xscale == 2) {
ImagingReduce2x2(imOut, imIn, box);
} else if (xscale == 3) {
ImagingReduce3x3(imOut, imIn, box);
} else if (xscale == 4) {
ImagingReduce4x4(imOut, imIn, box);
} else {
ImagingReduce5x5(imOut, imIn, box);
}
} else {
ImagingReduceNxN(imOut, imIn, box, xscale, yscale);
}
ImagingReduceCorners(imOut, imIn, box, xscale, yscale);
break;
case IMAGING_TYPE_INT32:
case IMAGING_TYPE_FLOAT32:
ImagingReduceNxN_32bpc(imOut, imIn, box, xscale, yscale);
ImagingReduceCorners_32bpc(imOut, imIn, box, xscale, yscale);
break;
}
ImagingSectionLeave(&cookie);
return imOut;
}
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