Route grid render state through GL backend

src/renderer_gl/opengl_capabilities.cpp

@@ -503,6 +503,18 @@ pp::foundation::Status clear_opengl_color_buffer_with_write_mask(
     return pp::foundation::Status::success();
 }
 
+pp::foundation::Status apply_opengl_color_write_mask(
+    OpenGlColorWriteMask mask,
+    OpenGlColorWriteMaskDispatch dispatch) noexcept
+{
+    if (dispatch.color_mask == nullptr) {
+        return pp::foundation::Status::invalid_argument("OpenGL color-write-mask dispatch callback must not be null");
+    }
+
+    dispatch.color_mask(mask.r, mask.g, mask.b, mask.a);
+    return pp::foundation::Status::success();
+}
+
 pp::foundation::Status activate_opengl_texture_unit(
     std::uint32_t unit_index,
     OpenGlActiveTextureDispatch dispatch) noexcept

src/renderer_gl/opengl_capabilities.h

@@ -575,6 +575,10 @@ struct OpenGlColorMaskedClearDispatch {
     OpenGlClearFn clear = nullptr;
 };
 
+struct OpenGlColorWriteMaskDispatch {
+    OpenGlColorMaskFn color_mask = nullptr;
+};
+
 struct OpenGlViewportDispatch {
     OpenGlViewportFn viewport = nullptr;
 };
@@ -883,6 +887,9 @@ struct OpenGlMeshDeleteDispatch {
 [[nodiscard]] pp::foundation::Status clear_opengl_color_buffer_with_write_mask(
     OpenGlColorMaskedClear clear,
     OpenGlColorMaskedClearDispatch dispatch) noexcept;
+[[nodiscard]] pp::foundation::Status apply_opengl_color_write_mask(
+    OpenGlColorWriteMask mask,
+    OpenGlColorWriteMaskDispatch dispatch) noexcept;
 [[nodiscard]] pp::foundation::Status activate_opengl_texture_unit(
     std::uint32_t unit_index,
     OpenGlActiveTextureDispatch dispatch) noexcept;