From b0a663d39d2de1dcfd9a0381cc822c4713da508e Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Mon, 1 Jun 2020 19:49:32 +0200 Subject: render: introduce wlr_swapchain The swapchain maximum capacity is set to 4, so that we have enough room for: - A buffer currently displayed on screen - A buffer queued for display (e.g. to KMS) - A pending buffer that'll be queued next commit - An additional pending buffer in case we want to invalidate the currently pending one --- include/render/swapchain.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 include/render/swapchain.h (limited to 'include/render') diff --git a/include/render/swapchain.h b/include/render/swapchain.h new file mode 100644 index 00000000..57a0cd3f --- /dev/null +++ b/include/render/swapchain.h @@ -0,0 +1,41 @@ +#ifndef RENDER_SWAPCHAIN_H +#define RENDER_SWAPCHAIN_H + +#include +#include +#include + +#define WLR_SWAPCHAIN_CAP 4 + +struct wlr_swapchain_slot { + struct wlr_buffer *buffer; + bool acquired; // waiting for release + + 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); + +#endif -- cgit v1.2.3