From 11bf8046d8af1e6c6cc59e681773179b9d62361d Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Wed, 13 Jan 2021 19:42:06 +0100
Subject: [PATCH] Added screen resolution modifiers to get proper high
 resolution scaling.

---
 es-core/src/renderers/Renderer.cpp | 8 ++++++++
 es-core/src/renderers/Renderer.h   | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/es-core/src/renderers/Renderer.cpp b/es-core/src/renderers/Renderer.cpp
index 76d280fce..d68b1f4b9 100644
--- a/es-core/src/renderers/Renderer.cpp
+++ b/es-core/src/renderers/Renderer.cpp
@@ -31,6 +31,9 @@ namespace Renderer
     static int screenOffsetY = 0;
     static int screenRotate = 0;
     static bool initialCursorState = 1;
+    // Screen resolution modifiers relative to the 1920x1080 reference.
+    static float screenHeightModifier;
+    static float screenWidthModifier;
 
     static void setIcon()
     {
@@ -97,6 +100,9 @@ namespace Renderer
         screenRotate = Settings::getInstance()->getInt("ScreenRotate") ?
                 Settings::getInstance()->getInt("ScreenRotate") : 0;
 
+        screenHeightModifier = static_cast<float>(screenHeight) / 1080.0f;
+        screenWidthModifier = static_cast<float>(screenWidth) / 1920.0f;
+
         // Prevent ES window from minimizing when switching windows (when launching
         // games or when manually switching windows using task switcher).
         SDL_SetHint(SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS, "0");
@@ -427,5 +433,7 @@ namespace Renderer
     int getScreenOffsetX() { return screenOffsetX; }
     int getScreenOffsetY() { return screenOffsetY; }
     int getScreenRotate() { return screenRotate; }
+    float getScreenWidthModifier() { return screenWidthModifier; }
+    float getScreenHeightModifier() { return screenHeightModifier; }
 
 } // Renderer::
diff --git a/es-core/src/renderers/Renderer.h b/es-core/src/renderers/Renderer.h
index dae740ae4..10bb80802 100644
--- a/es-core/src/renderers/Renderer.h
+++ b/es-core/src/renderers/Renderer.h
@@ -156,6 +156,8 @@ namespace Renderer
     int getScreenOffsetX();
     int getScreenOffsetY();
     int getScreenRotate();
+    float getScreenWidthModifier();
+    float getScreenHeightModifier();
 
     unsigned int convertRGBAToABGR(unsigned int color);
     unsigned int convertABGRToRGBA(unsigned int color);