Own log worker and trim Apple platform hooks

src/legacy_canvas_draw_merge_services.h

@@ -568,6 +568,28 @@ inline void execute_legacy_canvas_draw_merge_cache_to_screen_composite(
     execution.unbind_cache_texture();
 }
 
+template <typename PlaneTransform, typename DrawPlane>
+[[nodiscard]] inline auto make_legacy_canvas_draw_merge_cache_to_screen_checkerboard_plane(
+    glm::mat4 proj,
+    glm::mat4 camera,
+    float layer_scale,
+    PlaneTransform plane_transform,
+    DrawPlane draw_plane)
+{
+    return [proj, camera, layer_scale, plane_transform, draw_plane](
+               const LegacyCanvasDrawMergeCheckerboardUniforms& uniforms,
+               int plane_index) {
+        auto checkerboard_uniforms = uniforms;
+        checkerboard_uniforms.mvp = proj * camera *
+            glm::scale(glm::vec3(layer_scale)) *
+            plane_transform[plane_index] *
+            glm::translate(glm::vec3(0, 0, -1.f));
+
+        setup_legacy_canvas_draw_merge_checkerboard_shader(checkerboard_uniforms);
+        draw_plane();
+    };
+}
+
 inline void execute_legacy_canvas_draw_merge_display_resolve(
     const LegacyCanvasDrawMergeDisplayResolveUniforms& uniforms,
     const LegacyCanvasDrawMergeDisplayResolveExecution& execution)