ui/spice: Destroy the temporary egl fb after the blit is submitted

The temporary egl fb scanout_tex_fb is only needed to facilitate the
blit to the display surface's texture (ssd->ds->texture). Therefore,
destroy it after the blit is submitted. And, also make sure that it
is empty initialized before it is actually used.

Fixes: f851cd65 ("ui/spice: Blit the scanout texture if its memory layout is not linear")
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20250718234039.2266704-1-vivek.kasireddy@intel.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

diff --git a/ui/spice-display.c b/ui/spice-display.c
index 9ce622cefce237324d5292fa37f3b7806b895fa9..669832c5612a068d2fd03f4a5b725d763fdb3c5a 100644 (file)
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -1183,20 +1183,20 @@ static void qemu_spice_gl_release_dmabuf(DisplayChangeListener *dcl,
     egl_dmabuf_release_texture(dmabuf);
 }
 
-static bool spice_gl_blit_scanout_texture(SimpleSpiceDisplay *ssd,
-                                          egl_fb *scanout_tex_fb)
+static bool spice_gl_blit_scanout_texture(SimpleSpiceDisplay *ssd)
 {
     uint32_t offsets[DMABUF_MAX_PLANES], strides[DMABUF_MAX_PLANES];
     int fds[DMABUF_MAX_PLANES], num_planes, fourcc;
+    egl_fb scanout_tex_fb = {};
     uint64_t modifier;
     bool ret;
 
-    egl_fb_destroy(scanout_tex_fb);
-    egl_fb_setup_for_tex(scanout_tex_fb,
+    egl_fb_setup_for_tex(&scanout_tex_fb,
                          surface_width(ssd->ds), surface_height(ssd->ds),
                          ssd->ds->texture, false);
-    egl_fb_blit(scanout_tex_fb, &ssd->guest_fb, false);
+    egl_fb_blit(&scanout_tex_fb, &ssd->guest_fb, false);
     glFlush();
+    egl_fb_destroy(&scanout_tex_fb);
 
     if (!ssd->new_scanout_texture) {
         return true;
@@ -1330,9 +1330,7 @@ static void qemu_spice_gl_update(DisplayChangeListener *dcl,
     }
 
     if (spice_remote_client && ssd->blit_scanout_texture) {
-        egl_fb scanout_tex_fb;
-
-        ret = spice_gl_blit_scanout_texture(ssd, &scanout_tex_fb);
+        ret = spice_gl_blit_scanout_texture(ssd);
         if (!ret) {
             return;
         }