[Mesa-dev] [PATCH 09/16] svga: set render target flag for snorm surfaces

[Brian Paul]

We don't normally support rendering to SNORM surfaces, but with
GL_ARB_copy_image we can copy to them if we treat them as typeless
and use a UNORM surface view.
---
 src/gallium/drivers/svga/svga_resource_texture.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/gallium/drivers/svga/svga_resource_texture.c b/src/gallium/drivers/svga/svga_resource_texture.c
index 14fe220..aa7724a 100644
--- a/src/gallium/drivers/svga/svga_resource_texture.c
+++ b/src/gallium/drivers/svga/svga_resource_texture.c
@@ -963,6 +963,16 @@ svga_texture_create(struct pipe_screen *screen,
                       svga_format_name(typeless),
                       bindings);
       }
+
+      if (svga_format_is_uncompressed_snorm(tex->key.format)) {
+         /* We can't normally render to snorm surfaces, but once we
+          * substitute a typeless format, we can if the rendertarget view
+          * is unorm.  This can happen with GL_ARB_copy_image.
+          */
+         tex->key.flags |= SVGA3D_SURFACE_HINT_RENDERTARGET;
+         tex->key.flags |= SVGA3D_SURFACE_BIND_RENDER_TARGET;
+      }
+
       tex->key.format = typeless;
    }
 
-- 
1.9.1