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Move presum_gaussian to render.c

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Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2018-12-16 02:49:31 +00:00
parent a48e1f65a9
commit 404a6b47ad
2 changed files with 47 additions and 51 deletions
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47
src/render.c
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@ -1183,6 +1183,50 @@ static bool init_alpha_picts(session_t *ps) {
return true;
}
/// precompute shadow corners and sides to save time for large windows
static void presum_gaussian(session_t *ps, conv *map) {
ps->cgsize = map->size;
const int center = map->size / 2;
const int r = ps->cgsize + 1; // radius of the kernel
const int width = ps->cgsize * 2, height = ps->cgsize * 2;
if (ps->shadow_corner)
free(ps->shadow_corner);
if (ps->shadow_top)
free(ps->shadow_top);
// clang-format off
ps->shadow_corner = cvalloc(r*r*26);
ps->shadow_top = cvalloc(r*26);
for (int x = 0; x < r; x++) {
double sum = sum_kernel(map, x-center, center, width, height);
int tmp = ps->shadow_top[25*r+x] = (unsigned char)(sum*255.0);
for (int opacity = 0; opacity < 25; opacity++) {
ps->shadow_top[opacity*r+x] = tmp*opacity/25;
}
}
for (int x = 0; x < r; x++) {
for (int y = 0; y <= x; y++) {
double sum =
sum_kernel(map, x-center, y-center, width, height);
ps->shadow_corner[25*r*r+y*r+x] = (unsigned char)(sum*255.0);
ps->shadow_corner[25*r*r+x*r+y] = ps->shadow_corner[25*r*r+y*r+x];
for (int opacity = 0; opacity < 25; opacity++) {
ps->shadow_corner[opacity*r*r+y*r+x] =
ps->shadow_corner[opacity*r*r+x*r+y] =
ps->shadow_corner[25*r*r+y*r+x]*opacity/25;
}
}
}
// clang-format on
}
bool init_render(session_t *ps) {
// Initialize OpenGL as early as possible
if (bkend_use_glx(ps)) {
@ -1232,6 +1276,9 @@ bool init_render(session_t *ps) {
return false;
}
ps->gaussian_map = gaussian_kernel(ps->o.shadow_radius);
presum_gaussian(ps, ps->gaussian_map);
ps->black_picture = solid_picture(ps, true, 1, 0, 0, 0);
ps->white_picture = solid_picture(ps, true, 1, 1, 1, 1);