python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2025-01-25 00:34:14 +03:00
Code Issues Packages Projects Releases Wiki Activity

move HorizontalBoxBlur8 down and remove comments

Browse Source
This commit is contained in:
homm 2014-10-12 22:37:25 +04:00
parent 591fc67aae
commit 2c723abbca
1 changed files with 50 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

111
libImaging/BoxBlur.c
View File

@ -2,67 +2,6 @@
#include "Imaging.h"
Imaging
HorizontalBoxBlur8(Imaging im, Imaging imOut, float floatRadius)
{
ImagingSectionCookie cookie;
int x, y, pix;
unsigned int acc;
unsigned int bulk;
UINT8 *line;
int lastx = im->xsize - 1;
int radius = (int) floatRadius;
UINT8 rem = (UINT8) (256 * (floatRadius - radius));
int w = (int) (256 * (floatRadius * 2 + 1));
int w2 = w / 2;
// printf("%d %d %d\n", rem, w, w2);
ImagingSectionEnter(&cookie);
for (y = 0; y < im->ysize; y++) {
line = im->image8[y];
/* Compute acc for -1 pixel (outside of image):
From "-radius-1" to "0" get first pixel,
then from "1" to "radius-1". */
acc = line[0] * (radius + 1);
for (pix = 0; pix < radius; pix++) {
acc += line[pix];
}
/* Substract pixel from left ("0").
Add pixels from radius. */
for (x = 0; x <= radius; x++) {
acc = acc + line[x + radius] - line[0];
bulk = (acc << 8) + (line[0] + line[x + radius + 1]) * rem;
imOut->image8[x][y] = (UINT8)((bulk + w2) / w);
}
/* Substract previous pixel from "-radius".
Add pixels from radius. */
for (x = radius + 1; x < im->xsize - radius; x++) {
acc = acc + line[x + radius] - line[x - radius - 1];
bulk = (acc << 8) + (line[x - radius - 1] + line[x + radius + 1]) * rem;
imOut->image8[x][y] = (UINT8)((bulk + w2) / w);
}
/* Substract previous pixel from "-radius".
Add last pixel. */
for (x = im->xsize - radius; x < im->xsize; x++) {
acc = acc + line[lastx] - line[x - radius - 1];
bulk = (acc << 8) + (line[x - radius - 1] + line[lastx]) * rem;
imOut->image8[x][y] = (UINT8)((bulk + w2) / w);
}
}
ImagingSectionLeave(&cookie);
return imOut;
}
Imaging
HorizontalBoxBlur32(Imaging im, Imaging imOut, float floatRadius)
{
@ -147,6 +86,56 @@ HorizontalBoxBlur32(Imaging im, Imaging imOut, float floatRadius)
}
Imaging
HorizontalBoxBlur8(Imaging im, Imaging imOut, float floatRadius)
{
ImagingSectionCookie cookie;
int x, y, pix;
unsigned int acc;
unsigned int bulk;
UINT8 *line;
int lastx = im->xsize - 1;
int radius = (int) floatRadius;
UINT8 rem = (UINT8) (256 * (floatRadius - radius));
int w = (int) (256 * (floatRadius * 2 + 1));
int w2 = w / 2;
ImagingSectionEnter(&cookie);
for (y = 0; y < im->ysize; y++) {
line = im->image8[y];
acc = line[0] * (radius + 1);
for (pix = 0; pix < radius; pix++) {
acc += line[pix];
}
for (x = 0; x <= radius; x++) {
acc = acc + line[x + radius] - line[0];
bulk = (acc << 8) + (line[0] + line[x + radius + 1]) * rem;
imOut->image8[x][y] = (UINT8)((bulk + w2) / w);
}
for (x = radius + 1; x < im->xsize - radius; x++) {
acc = acc + line[x + radius] - line[x - radius - 1];
bulk = (acc << 8) + (line[x - radius - 1] + line[x + radius + 1]) * rem;
imOut->image8[x][y] = (UINT8)((bulk + w2) / w);
}
for (x = im->xsize - radius; x < im->xsize; x++) {
acc = acc + line[lastx] - line[x - radius - 1];
bulk = (acc << 8) + (line[x - radius - 1] + line[lastx]) * rem;
imOut->image8[x][y] = (UINT8)((bulk + w2) / w);
}
}
ImagingSectionLeave(&cookie);
return imOut;
}
Imaging
ImagingBoxBlur(Imaging im, Imaging imOut, float radius)
{