gfx: add ShmGfxTexture

src/gfx_apis/gl/renderer/texture.rs

@@ -1,7 +1,7 @@
 use {
     crate::{
         format::Format,
-        gfx_api::{GfxError, GfxTexture},
+        gfx_api::{GfxError, GfxTexture, ShmGfxTexture},
         gfx_apis::gl::{
             gl::texture::GlTexture,
             renderer::{context::GlRenderContext, framebuffer::Framebuffer},
@@ -82,3 +82,9 @@ impl GfxTexture for Texture {
         self.format
     }
 }
+
+impl ShmGfxTexture for Texture {
+    fn into_texture(self: Rc<Self>) -> Rc<dyn GfxTexture> {
+        self
+    }
+}