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Make buffer age not glx specific

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Buffer age is not a glx specific concept. xrender backend can have
buffer age too, if double buffering is used (required if we want to use
Present). So, make buffer age a generic concept in compton is required
for further backend improvements.

Moved buffer age based damage aggragation out of glx as well.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-01-08 23:15:00 +00:00
parent 377b18a00f
commit e80ff8530e
6 changed files with 180 additions and 283 deletions
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57
src/backend/gl/glx.c
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@ -592,63 +592,6 @@ void glx_render_win(void *backend_data, session_t *ps, win *w, void *win_data, c
gl_check_err();
}
/**
* Preprocess function before start painting.
*/
static void attr_unused glx_paint_pre(session_t *ps, region_t *preg) {
// glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Get buffer age
bool trace_damage = (ps->o.glx_swap_method < 0 || ps->o.glx_swap_method > 1);
// Trace raw damage regions
region_t newdamage;
pixman_region32_init(&newdamage);
if (trace_damage)
copy_region(&newdamage, preg);
// We use GLX buffer_age extension to decide which pixels in
// the back buffer is reusable, and limit our redrawing
int buffer_age = 0;
// Query GLX_EXT_buffer_age for buffer age
if (ps->o.glx_swap_method == SWAPM_BUFFER_AGE) {
unsigned val = 0;
glXQueryDrawable(ps->dpy, get_tgt_window(ps), GLX_BACK_BUFFER_AGE_EXT, &val);
buffer_age = val;
}
// Buffer age too high
if (buffer_age > CGLX_MAX_BUFFER_AGE + 1)
buffer_age = 0;
assert(buffer_age >= 0);
if (buffer_age) {
// Determine paint area
for (int i = 0; i < buffer_age - 1; ++i)
pixman_region32_union(preg, preg, &ps->all_damage_last[i]);
} else
// buffer_age == 0 means buffer age is not available, paint everything
copy_region(preg, &ps->screen_reg);
if (trace_damage) {
// XXX use a circular queue instead of memmove
pixman_region32_fini(&ps->all_damage_last[CGLX_MAX_BUFFER_AGE - 1]);
memmove(ps->all_damage_last + 1, ps->all_damage_last,
(CGLX_MAX_BUFFER_AGE - 1) * sizeof(region_t *));
ps->all_damage_last[0] = newdamage;
}
// gl_set_clip(ps, preg);
#ifdef DEBUG_GLX_PAINTREG
glx_render_color(ps, 0, 0, ps->root_width, ps->root_height, 0, *preg, NULL);
#endif
gl_check_err();
}
backend_info_t glx_backend = {
.init = glx_init,
.deinit = glx_deinit,