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

[Vivek Kasireddy]

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.mayd...@linaro.org>
Cc: Marc-André Lureau <marcandre.lur...@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasire...@intel.com>
---
v2:
- Make scanout_tex_fb local to spice_gl_blit_scanout_texture() since
  it is not used outside of it (Peter)
---
 ui/spice-display.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/ui/spice-display.c b/ui/spice-display.c
index 9ce622cefc..669832c561 100644
--- 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;
         }
-- 
2.49.0