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linux_dmabuf_v1: Introduce main device

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Introduce properties for the main renderer and allocator the compositor
wants wlroots to use when it needs to blit to a staging buffer during
multigpu. We need to perform an additional blit if the modifier is not
compatible with the target GPU.
This commit is contained in:
Alexander Orzechowski 2024-02-02 20:38:56 -05:00
parent 5eb9a2ea10
commit b0e8e6eae7
3 changed files with 107 additions and 5 deletions
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30
include/wlr/types/wlr_linux_dmabuf_v1.h
View file

@ -17,6 +17,8 @@
#include <wlr/render/drm_format_set.h>
struct wlr_surface;
struct wlr_renderer;
struct wlr_allocator;
struct wlr_dmabuf_v1_buffer {
struct wlr_buffer base;
@ -27,6 +29,8 @@ struct wlr_dmabuf_v1_buffer {
// private state
struct wl_listener release;
struct wlr_linux_dmabuf_v1 *linux_dmabuf_v1;
};
/**
@ -63,7 +67,13 @@ struct wlr_linux_dmabuf_v1 {
int main_device_fd; // to sanity check FDs sent by clients, -1 if unavailable
// used for multigpu
struct wlr_renderer *main_renderer;
struct wlr_allocator *main_allocator;
struct wl_listener display_destroy;
struct wl_listener main_renderer_destroy;
struct wl_listener main_allocator_destroy;
bool (*check_dmabuf_callback)(struct wlr_dmabuf_attributes *attribs, void *data);
void *check_dmabuf_callback_data;
@ -78,6 +88,23 @@ struct wlr_linux_dmabuf_v1 {
struct wlr_linux_dmabuf_v1 *wlr_linux_dmabuf_v1_create(struct wl_display *display,
uint32_t version, const struct wlr_linux_dmabuf_feedback_v1 *default_feedback);
/**
* Returns the associated dmabuf object from a generic buffer. Returnns
* NULL if the generic buffer is not a dmabuf.
*/
struct wlr_dmabuf_v1_buffer *wlr_dmabuf_v1_buffer_try_from_buffer(
struct wlr_buffer *buffer);
/**
* Sets the main blit device used for multigpu. With multigpu, dmabufs with
* implicit modifiers or just modifiers that aren't supported by other GPUs
* might need to be blitted into a staging buffer with correct modifiers. This
* will be done with this allocator (to allocate the staging buffer) and renderer
* to render into the staging buffer.
*/
void wlr_linux_dmabuf_v1_set_main_blit_device(struct wlr_linux_dmabuf_v1 *linux_dmabuf,
struct wlr_renderer *renderer, struct wlr_allocator *allocator);
/**
* Create the linux-dmabuf-v1 global.
*
@ -120,6 +147,9 @@ void wlr_linux_dmabuf_feedback_v1_finish(struct wlr_linux_dmabuf_feedback_v1 *fe
struct wlr_linux_dmabuf_feedback_v1_init_options {
// Main renderer used by the compositor
struct wlr_renderer *main_renderer;
// Optional allocator created for the primary GPU used by the default feedback.
// This is used for multi gpu for allocating staging buffers.
struct wlr_allocator *main_allocator;
// Output on which direct scan-out is possible on the primary plane, or NULL
struct wlr_output *scanout_primary_output;
// Output layer feedback event, or NULL