Thanks for your answer, that'll help.

On 30/08/2023 13:49, Marc-André Lureau wrote:
Hi Antonio

On Wed, Aug 30, 2023 at 3:14 PM Antonio Caggiano
<quic_acagg...@quicinc.com> wrote:

Hi Marc-André,

I've been testing this, but I can't find where qemu_egl_display is set
when using sdl.

Whil ui/gtk.c sets that in gl_area_realize, from my understanding there
is no equivalent call in ui/sdl2-gl.c

Also, in which case SDL would use EGL, and is there a way to request
that (e.g. as opposed to GLX)?

I am not sure, it's a tricky question. It seems SDL will use EGL when
requesting ES (-display sdl,gl=es), at least with x11 and wayland (and
win32 iirc). There is also SDL_VIDEO_X11_FORCE_EGL >
Yes, some code is missing in sdl2.c to set qemu_egl_display so virgl
can rely on it. Patches welcome!

Good, I'll take care of that.



Kind regards,
Antonio Caggiano

On 06/06/2023 13:56, marcandre.lur...@redhat.com wrote:
From: Marc-André Lureau <marcandre.lur...@redhat.com>

virgl offers a few features that require to have access to the
underlying EGLDisplay. This is the case for the D3D texture sharing support.

The API callback is merged for virgl 1.0:
https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/1113

Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
   hw/display/virtio-gpu-virgl.c | 17 ++++++++++++++++-
   1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
index 1c47603d40..9831c482e5 100644
--- a/hw/display/virtio-gpu-virgl.c
+++ b/hw/display/virtio-gpu-virgl.c
@@ -18,9 +18,17 @@
   #include "hw/virtio/virtio.h"
   #include "hw/virtio/virtio-gpu.h"

+#include "ui/egl-helpers.h"
+
   #include <virglrenderer.h>

-static struct virgl_renderer_callbacks virtio_gpu_3d_cbs;
+#if VIRGL_RENDERER_CALLBACKS_VERSION >= 4
+static void *
+virgl_get_egl_display(G_GNUC_UNUSED void *cookie)
+{
+    return qemu_egl_display;
+}
+#endif

   static void virgl_cmd_create_resource_2d(VirtIOGPU *g,
                                            struct virtio_gpu_ctrl_command *cmd)
@@ -608,6 +616,13 @@ int virtio_gpu_virgl_init(VirtIOGPU *g)
   {
       int ret;

+#if VIRGL_RENDERER_CALLBACKS_VERSION >= 4
+    if (qemu_egl_display) {
+        virtio_gpu_3d_cbs.version = 4;
+        virtio_gpu_3d_cbs.get_egl_display = virgl_get_egl_display;
+    }
+#endif
+
       ret = virgl_renderer_init(g, 0, &virtio_gpu_3d_cbs);
       if (ret != 0) {
           error_report("virgl could not be initialized: %d", ret);



Cheers,
Antonio Caggiano

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