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update ImagingReduce4x4() to check pixelsize

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This commit is contained in:
Yay295 2022-08-25 10:55:26 -05:00
parent 22e0bb7100
commit 493515bfbf
1 changed files with 38 additions and 22 deletions
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52
src/libImaging/Reduce.c
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@ -826,7 +826,7 @@ ImagingReduce4x4(Imaging imOut, Imaging imIn, int box[4]) {
UINT32 ss0, ss1, ss2, ss3; UINT32 ss0, ss1, ss2, ss3;
const UINT32 amend = yscale * xscale / 2; const UINT32 amend = yscale * xscale / 2;
if (imIn->image8) { if (imIn->pixelsize == 1) {
for (y = 0; y < box[3] / yscale; y++) { for (y = 0; y < box[3] / yscale; y++) {
const int yy = box[1] + y * yscale; const int yy = box[1] + y * yscale;
const UINT8 *line0 = (UINT8 *)imIn->image[yy + 0]; const UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
@ -843,7 +843,7 @@ ImagingReduce4x4(Imaging imOut, Imaging imIn, int box[4]) {
out[x] = (ss0 + amend) >> 4; out[x] = (ss0 + amend) >> 4;
} }
} }
} else { } else if (imIn->pixelsize == 2) {
for (y = 0; y < box[3] / yscale; y++) { for (y = 0; y < box[3] / yscale; y++) {
const int yy = box[1] + y * yscale; const int yy = box[1] + y * yscale;
const UINT8 *line0 = (UINT8 *)imIn->image[yy + 0]; const UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
@ -851,25 +851,33 @@ ImagingReduce4x4(Imaging imOut, Imaging imIn, int box[4]) {
const UINT8 *line2 = (UINT8 *)imIn->image[yy + 2]; const UINT8 *line2 = (UINT8 *)imIn->image[yy + 2];
const UINT8 *line3 = (UINT8 *)imIn->image[yy + 3]; const UINT8 *line3 = (UINT8 *)imIn->image[yy + 3];
UINT8 *out = (UINT8 *)imOut->image[y]; UINT8 *out = (UINT8 *)imOut->image[y];
if (imIn->bands == 2) {
for (x = 0; x < box[2] / xscale; x++) { for (x = 0; x < box[2] / xscale; x++) {
const int xx = box[0] + x * xscale; const int xx = box[0] + x * xscale;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] + ss0 = line0[xx * 2 + 0] + line0[xx * 2 + 2] + line0[xx * 2 + 4] +
line0[xx * 4 + 12] + line1[xx * 4 + 0] + line1[xx * 4 + 4] + line0[xx * 2 + 6] + line1[xx * 2 + 0] + line1[xx * 2 + 2] +
line1[xx * 4 + 8] + line1[xx * 4 + 12] + line2[xx * 4 + 0] + line1[xx * 2 + 4] + line1[xx * 2 + 6] + line2[xx * 2 + 0] +
line2[xx * 4 + 4] + line2[xx * 4 + 8] + line2[xx * 4 + 12] + line2[xx * 2 + 2] + line2[xx * 2 + 4] + line2[xx * 2 + 6] +
line3[xx * 4 + 0] + line3[xx * 4 + 4] + line3[xx * 4 + 8] + line3[xx * 2 + 0] + line3[xx * 2 + 2] + line3[xx * 2 + 4] +
line3[xx * 4 + 12]; line3[xx * 2 + 6];
ss3 = line0[xx * 4 + 3] + line0[xx * 4 + 7] + line0[xx * 4 + 11] + ss1 = line0[xx * 2 + 1] + line0[xx * 2 + 3] + line0[xx * 2 + 5] +
line0[xx * 4 + 15] + line1[xx * 4 + 3] + line1[xx * 4 + 7] + line0[xx * 2 + 7] + line1[xx * 2 + 1] + line1[xx * 2 + 3] +
line1[xx * 4 + 11] + line1[xx * 4 + 15] + line2[xx * 4 + 3] + line1[xx * 2 + 5] + line1[xx * 2 + 7] + line2[xx * 2 + 1] +
line2[xx * 4 + 7] + line2[xx * 4 + 11] + line2[xx * 4 + 15] + line2[xx * 2 + 3] + line2[xx * 2 + 5] + line2[xx * 2 + 7] +
line3[xx * 4 + 3] + line3[xx * 4 + 7] + line3[xx * 4 + 11] + line3[xx * 2 + 1] + line3[xx * 2 + 3] + line3[xx * 2 + 5] +
line3[xx * 4 + 15]; line3[xx * 2 + 7];
const UINT32 v = MAKE_UINT32((ss0 + amend) >> 4, 0, 0, (ss3 + amend) >> 4); out[x * 2 + 0] = (ss0 + amend) >> 4;
memcpy(out + x * sizeof(v), &v, sizeof(v)); out[x * 2 + 1] = (ss1 + amend) >> 4;
} }
} else if (imIn->bands == 3) { }
} else if (imIn->pixelsize == 4) {
if (imIn->bands == 3) {
for (y = 0; y < box[3] / yscale; y++) {
const int yy = box[1] + y * yscale;
const UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
const UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
const UINT8 *line2 = (UINT8 *)imIn->image[yy + 2];
const UINT8 *line3 = (UINT8 *)imIn->image[yy + 3];
UINT8 *out = (UINT8 *)imOut->image[y];
for (x = 0; x < box[2] / xscale; x++) { for (x = 0; x < box[2] / xscale; x++) {
const int xx = box[0] + x * xscale; const int xx = box[0] + x * xscale;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] + ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +
@ -894,7 +902,15 @@ ImagingReduce4x4(Imaging imOut, Imaging imIn, int box[4]) {
(ss0 + amend) >> 4, (ss1 + amend) >> 4, (ss2 + amend) >> 4, 0); (ss0 + amend) >> 4, (ss1 + amend) >> 4, (ss2 + amend) >> 4, 0);
memcpy(out + x * sizeof(v), &v, sizeof(v)); memcpy(out + x * sizeof(v), &v, sizeof(v));
} }
}
} else if (imIn->bands == 4) { } else if (imIn->bands == 4) {
for (y = 0; y < box[3] / yscale; y++) {
const int yy = box[1] + y * yscale;
const UINT8 *line0 = (UINT8 *)imIn->image[yy + 0];
const UINT8 *line1 = (UINT8 *)imIn->image[yy + 1];
const UINT8 *line2 = (UINT8 *)imIn->image[yy + 2];
const UINT8 *line3 = (UINT8 *)imIn->image[yy + 3];
UINT8 *out = (UINT8 *)imOut->image[y];
for (x = 0; x < box[2] / xscale; x++) { for (x = 0; x < box[2] / xscale; x++) {
const int xx = box[0] + x * xscale; const int xx = box[0] + x * xscale;
ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] + ss0 = line0[xx * 4 + 0] + line0[xx * 4 + 4] + line0[xx * 4 + 8] +