Share retained utility GL dispatch bridges

src/legacy_gl_framebuffer_dispatch.h

@@ -91,6 +91,27 @@ inline void read_opengl_pixels(
         pixels);
 }
 
+inline void copy_opengl_tex_sub_image_2d(
+    std::uint32_t target,
+    std::int32_t level,
+    std::int32_t destination_x,
+    std::int32_t destination_y,
+    std::int32_t source_x,
+    std::int32_t source_y,
+    std::int32_t width,
+    std::int32_t height) noexcept
+{
+    glCopyTexSubImage2D(
+        static_cast<GLenum>(target),
+        static_cast<GLint>(level),
+        static_cast<GLint>(destination_x),
+        static_cast<GLint>(destination_y),
+        static_cast<GLint>(source_x),
+        static_cast<GLint>(source_y),
+        static_cast<GLsizei>(width),
+        static_cast<GLsizei>(height));
+}
+
 inline pp::renderer::gl::OpenGlTexture2DReadbackDispatch texture_2d_readback_dispatch() noexcept
 {
     return pp::renderer::gl::OpenGlTexture2DReadbackDispatch {
@@ -123,6 +144,13 @@ inline pp::renderer::gl::OpenGlFramebufferReadbackDispatch framebuffer_readback_
     };
 }
 
+inline pp::renderer::gl::OpenGlTexture2DFramebufferCopyDispatch framebuffer_to_texture_copy_dispatch() noexcept
+{
+    return pp::renderer::gl::OpenGlTexture2DFramebufferCopyDispatch {
+        .copy_tex_sub_image_2d = copy_opengl_tex_sub_image_2d,
+    };
+}
+
 inline pp::renderer::gl::OpenGlFramebufferBindDispatch framebuffer_bind_dispatch() noexcept
 {
     return pp::renderer::gl::OpenGlFramebufferBindDispatch {