Re: [PULL 4/6] ui/gtk-egl: guest fb texture needs to be regenerated when reinitializing egl

[Laurent Vivier <laurent@vivier.eu>]

Le 05/11/2021 à 12:30, Gerd Hoffmann a écrit :
> From: Dongwon Kim <dongwon.kim@intel.com>
> 
> If guest fb is backed by dmabuf (blob-resource), the texture bound to the
> old context needs to be recreated in case the egl is re-initialized (e.g.
> new window for vc is created in case of detaching/reattaching of the tab)
> 
> v2: call egl_dmabuf_release_texutre instead of putting 0 to dmabuf->texture
>      (Vivek Kasireddy)
> 
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
> Message-Id: <20211104065153.28897-3-dongwon.kim@intel.com>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>   ui/gtk-egl.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
> index 21649950983f..f2026e4b5c9b 100644
> --- a/ui/gtk-egl.c
> +++ b/ui/gtk-egl.c
> @@ -155,6 +155,10 @@ void gd_egl_refresh(DisplayChangeListener *dcl)
>               surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
>               surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
>           }
> +        if (vc->gfx.guest_fb.dmabuf) {
> +            egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
> +            gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
> +        }
>       }
>   
>       graphic_hw_update(dcl->con);
> 

This patch breaks something:

$ .../configure' '--target-list=m68k-softmmu' '--enable-virglrenderer'
$ make
...

FAILED: libcommon.fa.p/ui_gtk-egl.c.o
cc -m64 -mcx16 -Ilibcommon.fa.p -I../../../Projects/qemu-next/capstone/include/capstone 
-I../../../Projects/qemu-next/dtc/libfdt -I../../../Projects/qemu-next/slirp 
-I../../../Projects/qemu-next/slirp/src -I/usr/include/pixman-1 -I/usr/include/libpng16 
-I/usr/include/p11-kit-1 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include 
-I/usr/include/sysprof-4 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/gio-unix-2.0 
-I/usr/include/virgl -I/usr/include/gtk-3.0 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz 
-I/usr/include/freetype2 -I/usr/include/fribidi -I/usr/include/libxml2 -I/usr/include/cairo 
-I/usr/include/gdk-pixbuf-2.0 -I/usr/include/cloudproviders -I/usr/include/atk-1.0 
-I/usr/include/at-spi2-atk/2.0 -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include 
-I/usr/include/at-spi-2.0 -I/usr/include/vte-2.91 -fdiagnostics-color=auto -Wall -Winvalid-pch 
-Werror -std=gnu11 -O2 -g -isystem /home/laurent/Projects/qemu-next/linux-headers -isystem 
linux-headers -iquote . -iquote /home/laurent/Projects/qemu-next -iquote 
/home/laurent/Projects/qemu-next/include -iquote /home/laurent/Projects/qemu-next/disas/libvixl 
-iquote /home/laurent/Projects/qemu-next/tcg/i386 -pthread -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 
-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls 
-Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv 
-Wold-style-declaration -Wold-style-definition -Wtype-limits -Wformat-security -Wformat-y2k 
-Winit-self -Wignored-qualifiers -Wempty-body -Wnested-externs -Wendif-labels -Wexpansion-to-defined 
-Wimplicit-fallthrough=2 -Wno-missing-include-dirs -Wno-shift-negative-value -Wno-psabi 
-fstack-protector-strong -fPIE -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 -DNCURSES_WIDECHAR -D_REENTRANT 
-MD -MQ libcommon.fa.p/ui_gtk-egl.c.o -MF libcommon.fa.p/ui_gtk-egl.c.o.d -o 
libcommon.fa.p/ui_gtk-egl.c.o -c ../../../Projects/qemu-next/ui/gtk-egl.c
../../../Projects/qemu-next/ui/gtk-egl.c: In function 'gd_egl_refresh':
../../../Projects/qemu-next/ui/gtk-egl.c:159:13: error: implicit declaration of function 
'egl_dmabuf_release_texture' [-Werror=implicit-function-declaration]
   159 |             egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~
../../../Projects/qemu-next/ui/gtk-egl.c:159:13: error: nested extern declaration of 
'egl_dmabuf_release_texture' [-Werror=nested-externs]

I think we need something like:

diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index f2026e4b5c9b..45cb67712df0 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -155,10 +155,12 @@ void gd_egl_refresh(DisplayChangeListener *dcl)
              surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
              surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
          }
+#ifdef CONFIG_GBM
          if (vc->gfx.guest_fb.dmabuf) {
              egl_dmabuf_release_texture(vc->gfx.guest_fb.dmabuf);
              gd_egl_scanout_dmabuf(dcl, vc->gfx.guest_fb.dmabuf);
          }
+#endif
      }

      graphic_hw_update(dcl->con);

Thanks,
Laurent