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implement surface frame 

The surface frame callback lets a window know when it is a good time to show the
next frame if it is animating. In particular, this callback is used by
weston-simple-shm to throttle drawing.
This commit is contained in:
Tony Crisci 2017-08-09 15:58:41 -04:00 committed by Drew DeVault
parent 87fe13a9fa
commit 8306f46dfb
3 changed files with 56 additions and 1 deletions
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13
examples/compositor/main.c
View File

@ -23,6 +23,13 @@ struct sample_state {
struct xdg_shell_state xdg_shell;
};
/*
* Convert timespec to milliseconds
*/
static inline int64_t timespec_to_msec(const struct timespec *a) {
return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
}
void handle_output_frame(struct output_state *output, struct timespec *ts) {
struct compositor_state *state = output->compositor;
struct sample_state *sample = state->data;
@ -39,6 +46,12 @@ void handle_output_frame(struct output_state *output, struct timespec *ts) {
wlr_texture_get_matrix(surface->texture, &matrix,
&wlr_output->transform_matrix, 200, 200);
wlr_render_with_matrix(sample->renderer, surface->texture, &matrix);
struct wlr_frame_callback *cb, *cnext;
wl_list_for_each_safe(cb, cnext, &surface->frame_callback_list, link) {
wl_callback_send_done(cb->resource, timespec_to_msec(ts));
wl_resource_destroy(cb->resource);
}
}
}

7
include/wlr/types/wlr_surface.h
View File

@ -3,6 +3,11 @@
#include <wayland-server.h>
struct wlr_frame_callback {
struct wl_resource *resource;
struct wl_list link;
};
struct wlr_surface {
struct wl_resource *pending_buffer;
bool pending_attached;
@ -16,6 +21,8 @@ struct wlr_surface {
struct wl_signal destroy;
struct wl_signal commit;
} signals;
struct wl_list frame_callback_list; // wl_surface.frame
};
struct wlr_renderer;

37
types/wlr_surface.c
View File

@ -23,9 +23,36 @@ static void surface_damage(struct wl_client *client,
wlr_log(L_DEBUG, "TODO: surface damage");
}
static void destroy_frame_callback(struct wl_resource *resource) {
struct wlr_frame_callback *cb = wl_resource_get_user_data(resource);
wl_list_remove(&cb->link);
free(cb);
}
static void surface_frame(struct wl_client *client,
struct wl_resource *resource, uint32_t callback) {
wlr_log(L_DEBUG, "TODO: surface frame");
struct wlr_frame_callback *cb;
struct wlr_surface *surface = wl_resource_get_user_data(resource);
cb = malloc(sizeof *cb);
if (cb == NULL) {
wl_resource_post_no_memory(resource);
return;
}
cb->resource = wl_resource_create(client, &wl_callback_interface, 1,
callback);
if (cb->resource == NULL) {
free(cb);
wl_resource_post_no_memory(resource);
return;
}
wl_resource_set_implementation(cb->resource, NULL, cb,
destroy_frame_callback);
wl_list_insert(surface->frame_callback_list.prev, &cb->link);
}
static void surface_set_opaque_region(struct wl_client *client,
@ -103,6 +130,13 @@ static void destroy_surface(struct wl_resource *resource) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
wl_signal_emit(&surface->signals.destroy, surface);
wlr_texture_destroy(surface->texture);
struct wlr_frame_callback *cb, *next;
wl_list_for_each_safe(cb, next, &surface->frame_callback_list, link) {
wl_resource_destroy(cb->resource);
}
free(surface);
}
@ -113,6 +147,7 @@ struct wlr_surface *wlr_surface_create(struct wl_resource *res,
surface->resource = res;
wl_signal_init(&surface->signals.commit);
wl_signal_init(&surface->signals.destroy);
wl_list_init(&surface->frame_callback_list);
wl_resource_set_implementation(res, &surface_interface,
surface, destroy_surface);