wlroots-hyprland/include/wlr/render/swapchain.h

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#ifndef WLR_RENDER_SWAPCHAIN_H
#define WLR_RENDER_SWAPCHAIN_H
#include <stdbool.h>
#include <wayland-server-core.h>
#include <wlr/render/drm_format_set.h>
#define WLR_SWAPCHAIN_CAP 4
struct wlr_swapchain_slot {
struct wlr_buffer *buffer;
bool acquired; // waiting for release
int age;
struct wl_listener release;
};
struct wlr_swapchain {
struct wlr_allocator *allocator; // NULL if destroyed
int width, height;
struct wlr_drm_format *format;
struct wlr_swapchain_slot slots[WLR_SWAPCHAIN_CAP];
struct wl_listener allocator_destroy;
};
struct wlr_swapchain *wlr_swapchain_create(
struct wlr_allocator *alloc, int width, int height,
const struct wlr_drm_format *format);
void wlr_swapchain_destroy(struct wlr_swapchain *swapchain);
/**
* Acquire a buffer from the swap chain.
*
* The returned buffer is locked. When the caller is done with it, they must
* unlock it by calling wlr_buffer_unlock.
*/
struct wlr_buffer *wlr_swapchain_acquire(struct wlr_swapchain *swapchain,
int *age);
/**
* Mark the buffer as submitted for presentation. This needs to be called by
* swap chain users on frame boundaries.
*
* If the buffer hasn't been created via the swap chain, the call is ignored.
*/
void wlr_swapchain_set_buffer_submitted(struct wlr_swapchain *swapchain,
struct wlr_buffer *buffer);
#endif