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b33ab26fe7
We've had this struct for a while. It'd be useful for compositors if they want to manage the swap chains themselves instead of being forced to use wlr_output's. Some compositors might also want to use a swapchain without an output.
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
#ifndef WLR_RENDER_SWAPCHAIN_H
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#define WLR_RENDER_SWAPCHAIN_H
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#include <stdbool.h>
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#include <wayland-server-core.h>
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#include <wlr/render/drm_format_set.h>
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#define WLR_SWAPCHAIN_CAP 4
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struct wlr_swapchain_slot {
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struct wlr_buffer *buffer;
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bool acquired; // waiting for release
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int age;
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struct wl_listener release;
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};
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struct wlr_swapchain {
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struct wlr_allocator *allocator; // NULL if destroyed
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int width, height;
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struct wlr_drm_format *format;
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struct wlr_swapchain_slot slots[WLR_SWAPCHAIN_CAP];
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struct wl_listener allocator_destroy;
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};
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struct wlr_swapchain *wlr_swapchain_create(
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struct wlr_allocator *alloc, int width, int height,
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const struct wlr_drm_format *format);
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void wlr_swapchain_destroy(struct wlr_swapchain *swapchain);
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/**
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* Acquire a buffer from the swap chain.
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*
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* The returned buffer is locked. When the caller is done with it, they must
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* unlock it by calling wlr_buffer_unlock.
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*/
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struct wlr_buffer *wlr_swapchain_acquire(struct wlr_swapchain *swapchain,
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int *age);
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/**
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* Mark the buffer as submitted for presentation. This needs to be called by
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* swap chain users on frame boundaries.
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*
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* If the buffer hasn't been created via the swap chain, the call is ignored.
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*/
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void wlr_swapchain_set_buffer_submitted(struct wlr_swapchain *swapchain,
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struct wlr_buffer *buffer);
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#endif
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