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render/pixman: Add dmabuf support

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Adds linux-dmabuf support to the pixman renderer.  The main reason is so
clients can use GPU-accelerated rendering even if the compositor is
using the pixman renderer for whatever reason.  This also allows the
pixman renderer to import dmabufs (only RGB/ARGB formats, not YUV for
now).

Since after this change all renderers store a DRM FD, I move the drm_fd
from the individual implementations to the shared wlr_renderer base.
This means that renderer_autocreate() can set pixman's drm_fd for it and
the pixman renderer doesn't have to know about DRM at all.

Originally based on
961edfe44e
This commit is contained in:
David Turner 2024-06-10 17:10:20 +01:00
parent 27bbb91abf
commit e4ccc8e822
10 changed files with 36 additions and 42 deletions
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15
render/wlr_renderer.c
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@ -267,6 +267,14 @@ static struct wlr_renderer *renderer_autocreate(struct wlr_backend *backend, int
if ((is_auto && !has_render_node(backend)) || strcmp(renderer_name, "pixman") == 0) {
renderer = wlr_pixman_renderer_create();
if (open_preferred_drm_fd(backend, &drm_fd, &own_drm_fd)) {
wlr_log(WLR_DEBUG, "Creating pixman renderer with DRM FD %d", drm_fd);
renderer->drm_fd = drm_fd;
} else {
wlr_log(WLR_DEBUG, "Creating pixman renderer without DRM");
renderer->drm_fd = -1;
}
if (renderer) {
goto out;
} else {
@ -297,11 +305,8 @@ struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) {
return renderer_autocreate(backend, -1);
}
int wlr_renderer_get_drm_fd(struct wlr_renderer *r) {
if (!r->impl->get_drm_fd) {
return -1;
}
return r->impl->get_drm_fd(r);
int wlr_renderer_get_drm_fd(struct wlr_renderer *renderer) {
return renderer->drm_fd;
}
struct wlr_render_pass *wlr_renderer_begin_buffer_pass(struct wlr_renderer *renderer,