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linux_dmabuf_v1: Implement data_ptr_access

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Allow direct access to the pixel data of linux_dmabuf_v1 buffers by
mmapping the FD.  This causes a wait on any outstanding fences and also
triggers the DMA_BUF_SYNC mechanism to do any cache fiddling needed.

This doesn't support multi-planar formats (e.g. YUV420 from hardware
codecs)

I also fix the comment on wlr_renderer.render_buffer_caps (it's used for
textures, not the render target) and update
wlr_renderer_init_wl_display() and
wlr_linux_dmabuf_feedback_v1_init_with_options() to use the renderer's
own claimed buffer_caps instead of hardcoding DMABUF as required.

Loosely based on 46ef2cfa3c
This commit is contained in:
David Turner 2024-06-06 11:16:49 +01:00
parent af43d3b9e7
commit 27bbb91abf
5 changed files with 120 additions and 4 deletions
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2
render/wlr_renderer.c
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@ -84,7 +84,7 @@ bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
return false;
}
if (wlr_renderer_get_texture_formats(r, WLR_BUFFER_CAP_DMABUF) != NULL &&
if (wlr_renderer_get_texture_formats(r, r->render_buffer_caps) != NULL &&
wlr_renderer_get_drm_fd(r) >= 0 &&
wlr_linux_dmabuf_v1_create_with_renderer(wl_display, 4, r) == NULL) {
return false;