expected

web_server/app/Web_Plot_Session.cpp

@@ -1,11 +1,13 @@
 #include "Web_Plot_Session.h"
 #include "Pixel_Frame.h"
 #include "render_2D/export.h"
+#include <renderive/error/Error_Policy.hpp>
 #include <algorithm>
 #include <chrono>
 #include <cmath>
 #include <cstdint>
 #include <mutex>
+#include <stdexcept>
 #include <type_traits>
 #include <utility>
 #include <vector>
@@ -64,7 +66,9 @@ struct Web_Plot_Session::Impl {
     Impl() {
         plot.init();
         plot.set_background_color({3, 7, 18, 255});
-        static_cast<void>(plot.set_max_render_fps(30.0));
+        if (!plot.set_max_render_fps(30.0))
+            ::renderive::error::unexpected<std::logic_error>(
+                "validated web plot frame rate was rejected");
         plot.set_viewport_size({960, 600});
         const auto root = plot.root_renderable();
         constexpr Color axis_color{93, 116, 151, 255};
@@ -160,7 +164,7 @@ struct Web_Plot_Session::Impl {
         plot.activate_view();
         update_model();
         const auto initial_render = plot.render_frame(true);
-        if (initial_render != Plot_Render_Result::none)
+        if (!initial_render || *initial_render != Plot_Render_Status::rendered)
             plot.request_redraw();
     }
     ~Impl() {
@@ -268,7 +272,8 @@ struct Web_Plot_Session::Impl {
         if (!plot.view_active())
             return std::nullopt;
         update_model();
-        if (plot.render_frame(true) != Plot_Render_Result::none)
+        const auto render = plot.render_frame(true);
+        if (!render || *render != Plot_Render_Status::rendered)
             return std::nullopt;
         std::string pixels;
         const Color background = plot.background_color();