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add render timer API

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Based on five calls:
wlr_render_timer_create - creates a timer which can be reused across
  frames on the same renderer
wlr_renderer_begin_buffer_pass - now takes a timer so that backends can
  record when the rendering starts and finishes
wlr_render_timer_get_time - should be called as late as possible so that
  queries can make their way back from the GPU
wlr_render_timer_destroy - self-explanatory

The timer is exposed as an opaque `struct wlr_render_timer` so that
backends can store whatever they want in there.
This commit is contained in:
Rose Hudson 2023-06-02 10:25:07 +01:00 • committed by Simon Ser
parent bd834fe8d1
commit 9e8947e4d5
19 changed files with 87 additions and 23 deletions
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30
include/wlr/render/wlr_renderer.h
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@ -161,14 +161,23 @@ void wlr_renderer_destroy(struct wlr_renderer *renderer);
*/
struct wlr_render_pass;
/**
* An object that can be queried after a render to get the duration of the render.
*/
struct wlr_render_timer;
struct wlr_buffer_pass_options {
struct wlr_render_timer *timer;
};
/**
* Begin a new render pass with the supplied destination buffer.
*
* Callers must call wlr_render_pass_submit() once they are done with the
* render pass.
*/
struct wlr_render_pass *wlr_renderer_begin_buffer_pass(
struct wlr_renderer *renderer, struct wlr_buffer *buffer);
struct wlr_render_pass *wlr_renderer_begin_buffer_pass(struct wlr_renderer *renderer,
struct wlr_buffer *buffer, struct wlr_buffer_pass_options *options);
/**
* Submit the render pass.
@ -235,4 +244,21 @@ struct wlr_render_rect_options {
void wlr_render_pass_add_rect(struct wlr_render_pass *render_pass,
const struct wlr_render_rect_options *options);
/**
* Allocate and initialise a new render timer.
*/
struct wlr_render_timer *wlr_render_timer_create(struct wlr_renderer *renderer);
/**
* Get the render duration in nanoseconds from the timer.
*
* Returns -1 if the duration is unavailable.
*/
int wlr_render_timer_get_duration_ns(struct wlr_render_timer *timer);
/**
* Destroy the render timer.
*/
void wlr_render_timer_destroy(struct wlr_render_timer *timer);
#endif