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Get DMA-BUF from wlr_buffer if possible

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wlr_texture_to_dmabuf involves issuing EGL commands to get a DMA-BUF out
of an EGLImage.

When the client submits a DMA-BUF via the linux-dmabuf protocol, there's
no need to go through EGL. We can directly import the client's DMA-BUF
into Vulkan.

The old code is still retained as a fallback in case the client uses
wl_drm (old Xwayland) or wl_shm. Removing it would involve creating a
Vulkan-based wlr_renderer.

References: https://github.com/Plagman/gamescope/issues/16
This commit is contained in:
Simon Ser 2020-07-03 13:10:03 +02:00
parent 4ddb892d4f
commit b7505b23cf
1 changed files with 9 additions and 1 deletions
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10
src/wlserver.cpp
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@ -86,7 +86,15 @@ void xwayland_surface_role_commit(struct wlr_surface *wlr_surface) {
struct wlr_dmabuf_attributes dmabuf_attribs = {};
bool result = False;
result = wlr_texture_to_dmabuf( tex, &dmabuf_attribs );
if ( wlr_buffer_get_dmabuf( &wlr_surface->buffer->base, &dmabuf_attribs ) ) {
result = true;
for ( int i = 0; i < dmabuf_attribs.n_planes; i++ ) {
dmabuf_attribs.fd[i] = dup( dmabuf_attribs.fd[i] );
assert( dmabuf_attribs.fd[i] >= 0 );
}
} else {
result = wlr_texture_to_dmabuf( tex, &dmabuf_attribs );
}
assert( result == true );
gpuvis_trace_printf( "xwayland_surface_role_commit wlr_surface %p\n", wlr_surface );