Allow the user to set the background clear color during emulation

The background color can be seen at the sides of the bottom screen or when the window is wider than normal.

src/citra/config.cpp

@@ -66,6 +66,11 @@ void Config::ReadValues() {
     Settings::values.gpu_refresh_rate = glfw_config->GetInteger("Core", "gpu_refresh_rate", 30);
     Settings::values.frame_skip = glfw_config->GetInteger("Core", "frame_skip", 0);
 
+    // Renderer
+    Settings::values.bg_red   = (float)glfw_config->GetReal("Renderer", "bg_red",   1.0);
+    Settings::values.bg_green = (float)glfw_config->GetReal("Renderer", "bg_green", 1.0);
+    Settings::values.bg_blue  = (float)glfw_config->GetReal("Renderer", "bg_blue",  1.0);
+
     // Data Storage
     Settings::values.use_virtual_sd = glfw_config->GetBoolean("Data Storage", "use_virtual_sd", true);
 

src/citra/default_ini.h

@@ -41,6 +41,13 @@ gpu_refresh_rate =
 # 0 (default): No frameskip, 1: x2 frameskip, 2: x4 frameskip, 3: x8 frameskip, etc.
 frame_skip =
 
+[Renderer]
+# The clear color for the renderer. What shows up on the sides of the bottom screen.
+# Must be in range of 0.0-1.0. Defaults to 1.0 for all.
+bg_red =
+bg_blue =
+bg_green =
+
 [Data Storage]
 # Whether to create a virtual SD card.
 # 1 (default): Yes, 0: No

src/citra_qt/config.cpp

@@ -53,6 +53,12 @@ void Config::ReadValues() {
     Settings::values.frame_skip = qt_config->value("frame_skip", 0).toInt();
     qt_config->endGroup();
 
+    qt_config->beginGroup("Renderer");
+    Settings::values.bg_red   = qt_config->value("bg_red",   1.0).toFloat();
+    Settings::values.bg_green = qt_config->value("bg_green", 1.0).toFloat();
+    Settings::values.bg_blue  = qt_config->value("bg_blue",  1.0).toFloat();
+    qt_config->endGroup();
+
     qt_config->beginGroup("Data Storage");
     Settings::values.use_virtual_sd = qt_config->value("use_virtual_sd", true).toBool();
     qt_config->endGroup();
@@ -98,6 +104,13 @@ void Config::SaveValues() {
     qt_config->setValue("frame_skip", Settings::values.frame_skip);
     qt_config->endGroup();
 
+    qt_config->beginGroup("Renderer");
+    // Cast to double because Qt's written float values are not human-readable
+    qt_config->setValue("bg_red",   (double)Settings::values.bg_red);
+    qt_config->setValue("bg_green", (double)Settings::values.bg_green);
+    qt_config->setValue("bg_blue",  (double)Settings::values.bg_blue);
+    qt_config->endGroup();
+
     qt_config->beginGroup("Data Storage");
     qt_config->setValue("use_virtual_sd", Settings::values.use_virtual_sd);
     qt_config->endGroup();

src/core/settings.h

@@ -44,6 +44,11 @@ struct Values {
     // System Region
     int region_value;
 
+    // Renderer
+    float bg_red;
+    float bg_green;
+    float bg_blue;
+
     std::string log_filter;
 } extern values;
 

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -6,6 +6,7 @@
 #include "core/hw/hw.h"
 #include "core/hw/lcd.h"
 #include "core/mem_map.h"
+#include "core/settings.h"
 
 #include "common/emu_window.h"
 #include "common/profiler_reporting.h"
@@ -172,7 +173,7 @@ void RendererOpenGL::LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color
  * Initializes the OpenGL state and creates persistent objects.
  */
 void RendererOpenGL::InitOpenGLObjects() {
-    glClearColor(1.0f, 1.0f, 1.0f, 0.0f);
+    glClearColor(Settings::values.bg_red, Settings::values.bg_green, Settings::values.bg_blue, 0.0f);
     glDisable(GL_DEPTH_TEST);
 
     // Link shaders and get variable locations