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Use struct conv for blur kernel as well

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Instead of storing them as an array of xfixed.

Might cause some performance overhead for the new backend, because
it is allocating a buffer to do the conversion every frame. Will fix
later.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-02-17 23:47:46 +00:00
parent ae9dee8a9a
commit 2e2e8e3ce0
11 changed files with 215 additions and 203 deletions
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56
src/render.c
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@ -318,7 +318,7 @@ void paint_one(session_t *ps, win *w, const region_t *reg_paint) {
const int r = extents.right;
#define COMP_BDR(cx, cy, cwid, chei) \
paint_region(ps, w, (cx), (cy), (cwid), (chei), w->frame_opacity * w->opacity, \
paint_region(ps, w, (cx), (cy), (cwid), (chei), w->frame_opacity * w->opacity, \
reg_paint, pict)
// Sanitize the margins, in case some broken WM makes
@ -582,18 +582,6 @@ static inline void win_paint_shadow(session_t *ps, win *w, region_t *reg_paint)
w->shadow_paint.ptex, reg_paint, NULL);
}
/**
* Normalize a convolution kernel.
*/
static inline void normalize_conv_kern(int wid, int hei, xcb_render_fixed_t *kern) {
double sum = 0.0;
for (int i = 0; i < wid * hei; ++i)
sum += XFIXED_TO_DOUBLE(kern[i]);
double factor = 1.0 / sum;
for (int i = 0; i < wid * hei; ++i)
kern[i] = DOUBLE_TO_XFIXED(XFIXED_TO_DOUBLE(kern[i]) * factor);
}
/**
* @brief Blur an area on a buffer.
*
@ -630,8 +618,9 @@ static bool xr_blur_dst(session_t *ps, xcb_render_picture_t tgt_buffer, int x, i
for (int i = 0; blur_kerns[i]; ++i) {
assert(i < MAX_BLUR_PASS - 1);
xcb_render_fixed_t *convolution_blur = blur_kerns[i];
int kwid = XFIXED_TO_DOUBLE(convolution_blur[0]),
khei = XFIXED_TO_DOUBLE(convolution_blur[1]);
// `x / 65536.0` converts from X fixed point to double
int kwid = ((double)convolution_blur[0]) / 65536.0,
khei = ((double)convolution_blur[1]) / 65536.0;
bool rd_from_tgt = (tgt_buffer == src_pict);
// Copy from source picture to destination. The filter must
@ -685,7 +674,9 @@ static inline void win_blur_background(session_t *ps, win *w, xcb_render_picture
case BKEND_XR_GLX_HYBRID: {
// Normalize blur kernels
for (int i = 0; i < MAX_BLUR_PASS; ++i) {
xcb_render_fixed_t *kern_src = ps->o.blur_kerns[i];
// Note: `x * 65536` converts double `x` to a X fixed point
// representation. `x / 65536` is the other way.
auto kern_src = ps->o.blur_kerns[i];
xcb_render_fixed_t *kern_dst = ps->blur_kerns_cache[i];
assert(i < MAX_BLUR_PASS);
if (!kern_src) {
@ -693,30 +684,33 @@ static inline void win_blur_background(session_t *ps, win *w, xcb_render_picture
break;
}
assert(!kern_dst ||
(kern_src[0] == kern_dst[0] && kern_src[1] == kern_dst[1]));
assert(!kern_dst || (kern_src->w == kern_dst[0] / 65536 &&
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)
continue;
int kwid = XFIXED_TO_DOUBLE(kern_src[0]),
khei = XFIXED_TO_DOUBLE(kern_src[1]);
// Allocate cache space if needed
if (!kern_dst) {
kern_dst = ccalloc(kwid * khei + 2, xcb_render_fixed_t);
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_src[2 + (khei / 2) * kwid + kwid / 2] =
DOUBLE_TO_XFIXED(factor_center);
// Copy over
memcpy(kern_dst, kern_src,
(kwid * khei + 2) * sizeof(xcb_render_fixed_t));
normalize_conv_kern(kwid, khei, kern_dst + 2);
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;
}
// Minimize the region we try to blur, if the window itself is not
@ -1017,8 +1011,8 @@ void paint_all(session_t *ps, win *const t, bool ignore_damage) {
glFlush();
glXWaitX();
assert(ps->tgt_buffer.pixmap);
paint_bind_tex(ps, &ps->tgt_buffer, ps->root_width, ps->root_height, false,
ps->depth, ps->vis, !ps->o.glx_no_rebind_pixmap);
paint_bind_tex(ps, &ps->tgt_buffer, ps->root_width, ps->root_height,
false, ps->depth, ps->vis, !ps->o.glx_no_rebind_pixmap);
if (ps->o.vsync_use_glfinish)
glFinish();
else