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micro optimizations

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This commit is contained in:
homm 2014-10-12 22:33:09 +04:00
parent 92635d0624
commit 591fc67aae
1 changed files with 11 additions and 15 deletions
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26
libImaging/BoxBlur.c
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@ -38,21 +38,21 @@ HorizontalBoxBlur8(Imaging im, Imaging imOut, float floatRadius)
Add pixels from radius. */
for (x = 0; x <= radius; x++) {
acc = acc + line[x + radius] - line[0];
bulk = (acc << 8) + line[0] * rem + line[x + radius + 1] * rem;
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] * rem + line[x + radius + 1] * rem;
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] * rem + line[lastx] * rem;
bulk = (acc << 8) + (line[x - radius - 1] + line[lastx]) * rem;
imOut->image8[x][y] = (UINT8)((bulk + w2) / w);
}
}
@ -84,20 +84,16 @@ HorizontalBoxBlur32(Imaging im, Imaging imOut, float floatRadius)
// printf("%d %d %d\n", rem, w, w2);
#define MOVE_ACC(acc, substract, add) \
acc[0] -= line[substract][0]; \
acc[1] -= line[substract][1]; \
acc[2] -= line[substract][2]; \
acc[3] -= line[substract][3]; \
acc[0] += line[add][0]; \
acc[1] += line[add][1]; \
acc[2] += line[add][2]; \
acc[3] += line[add][3];
acc[0] += line[add][0] - line[substract][0]; \
acc[1] += line[add][1] - line[substract][1]; \
acc[2] += line[add][2] - line[substract][2]; \
acc[3] += line[add][3] - line[substract][3];
#define ADD_FAR(bulk, acc, left, right) \
bulk[0] = (acc[0] << 8) + line[left][0] * rem + line[right][0] * rem; \
bulk[1] = (acc[1] << 8) + line[left][1] * rem + line[right][1] * rem; \
bulk[2] = (acc[2] << 8) + line[left][2] * rem + line[right][2] * rem; \
bulk[3] = (acc[3] << 8) + line[left][3] * rem + line[right][3] * rem;
bulk[0] = (acc[0] << 8) + (line[left][0] + line[right][0]) * rem; \
bulk[1] = (acc[1] << 8) + (line[left][1] + line[right][1]) * rem; \
bulk[2] = (acc[2] << 8) + (line[left][2] + line[right][2]) * rem; \
bulk[3] = (acc[3] << 8) + (line[left][3] + line[right][3]) * rem;
#define SAVE(acc) \
(UINT8)((acc[0] + w2) / w) << 0 | (UINT8)((acc[1] + w2) / w) << 8 | \