ui/spice: Create a new texture with linear layout when gl=on is specified

Since most encoders/decoders (invoked by Spice) may not work properly
with tiled memory associated with a texture, we need to create another
texture that has linear memory layout and use that instead.

Note that, there does not seem to be a direct way to indicate to the
GL implementation that a texture's backing memory needs to be linear.
Instead, we have to do it in a roundabout way where we need to first
create a tiled texture and import that as a memory object to create
a new texture that has a linear memory layout.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Frediano Ziglio <freddy77@gmail.com>
Cc: Dongwon Kim <dongwon.kim@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Co-developed-by: Michael Scherle <michael.scherle@rz.uni-freiburg.de>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Message-Id: <20250617043546.1022779-7-vivek.kasireddy@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/ui/surface.h b/include/ui/surface.h
index f16f7be8be..006b1986bb 100644
--- a/include/ui/surface.h
+++ b/include/ui/surface.h
@@ -22,6 +22,7 @@ typedef struct DisplaySurface {
     GLenum glformat;
     GLenum gltype;
     GLuint texture;
+    GLuint mem_obj;
 #endif
     qemu_pixman_shareable share_handle;
     uint32_t share_handle_offset;