From 6377ac7bfbdb10456e5a7f8f7f889c60b7f2df05 Mon Sep 17 00:00:00 2001
From: Philip Goto <philip.goto@gmail.com>
Date: Mon, 30 Oct 2017 21:44:10 +0100
Subject: [PATCH] Create enum for scale quality

---
 src/openrct2-ui/UiContext.cpp                        |  6 +++---
 .../drawing/engines/HardwareDisplayDrawingEngine.cpp |  6 +++---
 src/openrct2/config/Config.cpp                       | 12 ++++++++++--
 src/openrct2/config/Config.h                         |  8 ++++++++
 4 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/src/openrct2-ui/UiContext.cpp b/src/openrct2-ui/UiContext.cpp
index 720ea5412e..bc45a153c6 100644
--- a/src/openrct2-ui/UiContext.cpp
+++ b/src/openrct2-ui/UiContext.cpp
@@ -495,11 +495,11 @@ public:
         if (gConfigGeneral.use_nn_at_integer_scales &&
             gConfigGeneral.window_scale == std::floor(gConfigGeneral.window_scale))
         {
-            _scaleQuality = 0;
+            _scaleQuality = SCALE_QUALITY_NN;
         }
-        if (_scaleQuality == 3)
+        if (_scaleQuality == SCALE_QUALITY_SMOOTH_NN)
         {
-            _scaleQuality = 1;
+            _scaleQuality = SCALE_QUALITY_LINEAR;
         }
         snprintf(scaleQualityBuffer, sizeof(scaleQualityBuffer), "%u", _scaleQuality);
         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, scaleQualityBuffer);
diff --git a/src/openrct2-ui/drawing/engines/HardwareDisplayDrawingEngine.cpp b/src/openrct2-ui/drawing/engines/HardwareDisplayDrawingEngine.cpp
index 8c5441663a..2528efa6cf 100644
--- a/src/openrct2-ui/drawing/engines/HardwareDisplayDrawingEngine.cpp
+++ b/src/openrct2-ui/drawing/engines/HardwareDisplayDrawingEngine.cpp
@@ -105,11 +105,11 @@ public:
         if (gConfigGeneral.use_nn_at_integer_scales &&
             gConfigGeneral.window_scale == std::floor(gConfigGeneral.window_scale))
         {
-            scaleQuality = 0;
+            scaleQuality = SCALE_QUALITY_NN;
         }
-        if (scaleQuality == 3)
+        if (scaleQuality == SCALE_QUALITY_SMOOTH_NN)
         {
-            scaleQuality = 1;
+            scaleQuality = SCALE_QUALITY_LINEAR;
             smoothNN = true;
         }
         else
diff --git a/src/openrct2/config/Config.cpp b/src/openrct2/config/Config.cpp
index ecbb514ff6..9748c51a5f 100644
--- a/src/openrct2/config/Config.cpp
+++ b/src/openrct2/config/Config.cpp
@@ -99,6 +99,14 @@ namespace Config
         ConfigEnumEntry<sint32>("CELSIUS", TEMPERATURE_FORMAT_C),
         ConfigEnumEntry<sint32>("FAHRENHEIT", TEMPERATURE_FORMAT_F),
     });
+    
+    static auto Enum_ScaleQuality = ConfigEnum<sint32>(
+    {
+        ConfigEnumEntry<sint32>("NEAREST_NEIGHBOR", SCALE_QUALITY_NN),
+        ConfigEnumEntry<sint32>("LINEAR", SCALE_QUALITY_LINEAR),
+        ConfigEnumEntry<sint32>("ANISOTROPIC_FILTERING", SCALE_QUALITY_ANISOTROPIC),
+        ConfigEnumEntry<sint32>("SMOOTH_NEAREST_NEIGHBOUR", SCALE_QUALITY_SMOOTH_NN),
+    });
 
     /**
      * Config enum wrapping LanguagesDescriptors.
@@ -184,7 +192,7 @@ namespace Config
             model->allow_loading_with_incorrect_checksum = reader->GetBoolean("allow_loading_with_incorrect_checksum", true);
             model->steam_overlay_pause = reader->GetBoolean("steam_overlay_pause", true);
             model->window_scale = reader->GetFloat("window_scale", platform_get_default_scale());
-            model->scale_quality = reader->GetSint32("scale_quality", 1);
+            model->scale_quality = reader->GetEnum<sint32>("scale_quality", SCALE_QUALITY_SMOOTH_NN, Enum_ScaleQuality);
             model->use_nn_at_integer_scales = reader->GetBoolean("use_nn_at_integer_scales", true);
             model->show_fps = reader->GetBoolean("show_fps", false);
             model->trap_cursor = reader->GetBoolean("trap_cursor", false);
@@ -254,7 +262,7 @@ namespace Config
         writer->WriteBoolean("allow_loading_with_incorrect_checksum", model->allow_loading_with_incorrect_checksum);
         writer->WriteBoolean("steam_overlay_pause", model->steam_overlay_pause);
         writer->WriteFloat("window_scale", model->window_scale);
-        writer->WriteSint32("scale_quality", model->scale_quality);
+        writer->WriteEnum<sint32>("scale_quality", model->scale_quality, Enum_ScaleQuality);
         writer->WriteBoolean("use_nn_at_integer_scales", model->use_nn_at_integer_scales);
         writer->WriteBoolean("show_fps", model->show_fps);
         writer->WriteBoolean("trap_cursor", model->trap_cursor);
diff --git a/src/openrct2/config/Config.h b/src/openrct2/config/Config.h
index e253646680..495bc9427c 100644
--- a/src/openrct2/config/Config.h
+++ b/src/openrct2/config/Config.h
@@ -209,6 +209,14 @@ enum TEMPERATURE_FORMAT
     TEMPERATURE_FORMAT_F
 };
 
+enum SCALE_QUALITY
+{
+    SCALE_QUALITY_NN,
+    SCALE_QUALITY_LINEAR,
+    SCALE_QUALITY_ANISOTROPIC,
+    SCALE_QUALITY_SMOOTH_NN
+};
+
 enum MEASUREMENT_FORMAT
 {
     MEASUREMENT_FORMAT_IMPERIAL,