Move convert GL state into renderer backend

src/renderer_gl/opengl_capabilities.cpp

@@ -273,6 +273,47 @@ pp::foundation::Status apply_panopainter_initial_state(OpenGlStateDispatch dispa
     return pp::foundation::Status::success();
 }
 
+OpenGlConvertCommandState panopainter_convert_command_state() noexcept
+{
+    return OpenGlConvertCommandState {
+        .depth_test_enabled = false,
+        .program_point_size_enabled = true,
+        .depth_test_state = depth_test_state(),
+        .program_point_size_state = program_point_size_state(),
+        .source_color_factor = source_alpha_blend_factor(),
+        .destination_color_factor = one_minus_source_alpha_blend_factor(),
+        .blend_equation = add_blend_equation(),
+    };
+}
+
+pp::foundation::Status apply_panopainter_convert_command_state(
+    OpenGlConvertCommandStateDispatch dispatch) noexcept
+{
+    if (dispatch.enable == nullptr
+        || dispatch.disable == nullptr
+        || dispatch.blend_func == nullptr
+        || dispatch.blend_equation == nullptr)
+    {
+        return pp::foundation::Status::invalid_argument(
+            "OpenGL convert command state dispatch callbacks must not be null");
+    }
+
+    const auto state = panopainter_convert_command_state();
+    if (state.depth_test_enabled)
+        dispatch.enable(state.depth_test_state);
+    else
+        dispatch.disable(state.depth_test_state);
+
+    if (state.program_point_size_enabled)
+        dispatch.enable(state.program_point_size_state);
+    else
+        dispatch.disable(state.program_point_size_state);
+
+    dispatch.blend_func(state.source_color_factor, state.destination_color_factor);
+    dispatch.blend_equation(state.blend_equation);
+    return pp::foundation::Status::success();
+}
+
 pp::foundation::Result<OpenGlSavedState> snapshot_opengl_state(OpenGlStateSnapshotDispatch dispatch) noexcept
 {
     if (dispatch.is_enabled == nullptr