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main: User triple buffering 

Apparently, double buffering isn't enough
pull/6/head
Andri Yngvason 2022-04-10 14:59:21 +00:00
parent 93869627ed
commit 0b757d6623
1 changed files with 16 additions and 18 deletions
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34
src/main.c
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@ -51,8 +51,9 @@ struct window {
struct xdg_surface* xdg_surface;
struct xdg_toplevel* xdg_toplevel;
struct buffer* front_buffer;
struct buffer* buffers[3];
struct buffer* back_buffer;
int buffer_index;
struct vnc_client* vnc;
void* vnc_fb;
@ -316,9 +317,8 @@ static void window_commit(struct window* w)
static void window_swap(struct window* w)
{
struct buffer* tmp = w->front_buffer;
w->front_buffer = w->back_buffer;
w->back_buffer = tmp;
w->buffer_index = (w->buffer_index + 1) % 3;
w->back_buffer = w->buffers[w->buffer_index];
}
static void window_damage(struct window* w, int x, int y, int width, int height)
@ -352,16 +352,15 @@ static void window_resize(struct window* w, int width, int height)
w->back_buffer->height == height)
return;
buffer_destroy(w->front_buffer);
buffer_destroy(w->back_buffer);
for (int i = 0; i < 3; ++i)
buffer_destroy(w->buffers[i]);
w->front_buffer = have_egl ?
buffer_create_dmabuf(width, height, dmabuf_format) :
buffer_create_shm(width, height, 4 * width, shm_format);
for (int i = 0; i < 3; ++i)
w->buffers[i] = have_egl ?
buffer_create_dmabuf(width, height, dmabuf_format) :
buffer_create_shm(width, height, 4 * width, shm_format);
w->back_buffer = have_egl ?
buffer_create_dmabuf(width, height, dmabuf_format) :
buffer_create_shm(width, height, 4 * width, shm_format);
w->back_buffer = w->buffers[0];
}
static void xdg_toplevel_configure(void* data, struct xdg_toplevel* toplevel,
@ -419,8 +418,8 @@ wl_surface_failure:
static void window_destroy(struct window* w)
{
buffer_destroy(w->front_buffer);
buffer_destroy(w->back_buffer);
for (int i = 0; i < 3; ++i)
buffer_destroy(w->buffers[i]);
free(w->vnc_fb);
xdg_toplevel_destroy(w->xdg_toplevel);
@ -546,10 +545,9 @@ void on_vnc_client_update_fb(struct vnc_client* client)
region_translate(&damage, &damage_scaled, x_pos, y_pos);
pixman_region_fini(&damage_scaled);
pixman_region_union(&window->front_buffer->damage,
&window->front_buffer->damage, &damage);
pixman_region_union(&window->back_buffer->damage,
&window->back_buffer->damage, &damage);
for (int i = 0; i < 3; ++i)
pixman_region_union(&window->buffers[i]->damage,
&window->buffers[i]->damage, &damage);
int n_rects = 0;
struct pixman_box16* box = pixman_region_rectangles(&damage, &n_rects);