async tex support in new uniform syntax

src/glow/fwd.hh

@@ -57,4 +57,18 @@ struct BoundShaderStorageBuffer;
 struct BoundTransformFeedback;
 struct BoundUniformBuffer;
 struct BoundVertexArray;
+
+template <class TextureT>
+struct AsyncTexture;
+using AsyncTexture1D = AsyncTexture<Texture1D>;
+using AsyncTexture2D = AsyncTexture<Texture2D>;
+using AsyncTexture3D = AsyncTexture<Texture3D>;
+using AsyncTextureBuffer = AsyncTexture<TextureBuffer>;
+using AsyncTexture1DArray = AsyncTexture<Texture1DArray>;
+using AsyncTexture2DArray = AsyncTexture<Texture2DArray>;
+using AsyncTextureCubeMap = AsyncTexture<TextureCubeMap>;
+using AsyncTextureRectangle = AsyncTexture<TextureRectangle>;
+using AsyncTextureCubeMapArray = AsyncTexture<TextureCubeMapArray>;
+using AsyncTexture2DMultisample = AsyncTexture<Texture2DMultisample>;
+using AsyncTexture2DMultisampleArray = AsyncTexture<Texture2DMultisampleArray>;
 }

src/glow/objects/raii/UsedProgram.hh

@@ -162,5 +162,10 @@ void uniform_proxy::operator=(std::shared_ptr<TextureT> const& tex) &&
 {
     prog.setTexture(name, tex);
 }
+template <class TextureT>
+void uniform_proxy::operator=(AsyncTexture<TextureT> const& tex) &&
+{
+    prog.setTexture(name, tex.texture());
+}
 }
 }

src/glow/util/AsyncTexture.hh

@@ -80,16 +80,4 @@ private:
 
     friend class AsyncTextureLoader;
 };
-
-using AsyncTexture1D = AsyncTexture<Texture1D>;
-using AsyncTexture2D = AsyncTexture<Texture2D>;
-using AsyncTexture3D = AsyncTexture<Texture3D>;
-using AsyncTextureBuffer = AsyncTexture<TextureBuffer>;
-using AsyncTexture1DArray = AsyncTexture<Texture1DArray>;
-using AsyncTexture2DArray = AsyncTexture<Texture2DArray>;
-using AsyncTextureCubeMap = AsyncTexture<TextureCubeMap>;
-using AsyncTextureRectangle = AsyncTexture<TextureRectangle>;
-using AsyncTextureCubeMapArray = AsyncTexture<TextureCubeMapArray>;
-using AsyncTexture2DMultisample = AsyncTexture<Texture2DMultisample>;
-using AsyncTexture2DMultisampleArray = AsyncTexture<Texture2DMultisampleArray>;
 }

src/glow/util/uniform.hh

@@ -54,6 +54,8 @@ struct uniform_proxy
     void operator=(std::initializer_list<T> v) &&;
     template <class TextureT>
     void operator=(std::shared_ptr<TextureT> const& tex) &&;
+    template <class TextureT>
+    void operator=(AsyncTexture<TextureT> const& tex) &&;
     template <class T>
     void operator=(T const&) &
     {