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Cache converted blur kernel

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After converting from struct conv to xorg format, cache the result to
save CPU time.

And remove an unused function.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-02-20 16:43:42 +00:00
parent ed9c7064de
commit 9ec298305a
6 changed files with 61 additions and 74 deletions
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25
src/render.c
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@ -688,29 +688,14 @@ static inline void win_blur_background(session_t *ps, win *w, xcb_render_picture
kern_src->h == kern_dst[1] / 65536));
// Skip for fixed factor_center if the cache exists already
if (ps->o.blur_background_fixed && kern_dst)
if (ps->o.blur_background_fixed && kern_dst) {
continue;
// Allocate cache space if needed
if (!kern_dst) {
kern_dst = ccalloc(kern_src->w * kern_src->h + 2,
xcb_render_fixed_t);
ps->blur_kerns_cache[i] = kern_dst;
}
double sum = factor_center;
for (int j = 0; j < kern_src->w * kern_src->h; j++) {
sum += kern_src->data[j];
}
// Copy src to dst, normalizing in the process
for (int j = 0; j < kern_src->w * kern_src->h; j++) {
kern_dst[j + 2] = kern_src->data[j] / sum * 65536;
}
// Modify the factor of the center pixel
kern_dst[2 + (kern_src->h / 2) * kern_src->w + kern_src->w / 2] =
factor_center / sum * 65536;
kern_dst[0] = kern_src->w * 65536;
kern_dst[1] = kern_src->h * 65536;
// If kern_dst is allocated, it's always allocated to the right size
size_t size = kern_dst ? kern_src->w * kern_src->h + 2 : 0;
x_picture_filter_from_conv(kern_src, factor_center, &kern_dst, &size);
ps->blur_kerns_cache[i] = kern_dst;
}
// Minimize the region we try to blur, if the window itself is not