Extract main stroke live-pass orchestration

src/legacy_canvas_stroke_execution_services.h

@@ -151,6 +151,15 @@ struct LegacyCanvasStrokeSamplerDispatch {
     std::function<void()> unbind_mixer_sampler;
 };
 
+struct LegacyCanvasStrokeMainPassExecutionRequest {
+    std::string_view context;
+    std::function<void()> bind_samplers;
+    std::function<void()> bind_textures;
+    std::function<void()> execute_frame_pass;
+    std::function<void()> unbind_textures;
+    std::function<void()> unbind_samplers;
+};
+
 [[nodiscard]] inline LegacyCanvasStrokeSamplerDispatch make_legacy_canvas_stroke_live_pass_sampler_dispatch(
     std::function<void(int)> bind_brush_tip_sampler,
     std::function<void()> unbind_brush_tip_sampler,
@@ -195,6 +204,25 @@ struct LegacyCanvasStrokeSamplerDispatch {
     };
 }
 
+[[nodiscard]] inline bool execute_legacy_canvas_stroke_main_pass(
+    const LegacyCanvasStrokeMainPassExecutionRequest& request)
+{
+    if (!request.bind_samplers ||
+        !request.bind_textures ||
+        !request.execute_frame_pass ||
+        !request.unbind_textures ||
+        !request.unbind_samplers) {
+        return false;
+    }
+
+    request.bind_samplers();
+    request.bind_textures();
+    request.execute_frame_pass();
+    request.unbind_textures();
+    request.unbind_samplers();
+    return true;
+}
+
 struct LegacyCanvasStrokeFaceDirtyRequest {
     pp::renderer::Extent2D extent {};
     glm::vec4 previous_accumulated_dirty_box {};