From 821f5f5f29fc3140784eae34dd3adb36183472ac Mon Sep 17 00:00:00 2001
From: Jesse Talavera <jesse@jesse.tg>
Date: Sun, 21 Jul 2024 11:02:31 -0400
Subject: [PATCH] Allow frontends to use different headers for OpenGL
 declarations (#2102)

---
 src/PlatformOGL.h                  | 13 ++++++++++---
 src/frontend/qt_sdl/CMakeLists.txt |  8 ++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/PlatformOGL.h b/src/PlatformOGL.h
index bc047807..120e8690 100644
--- a/src/PlatformOGL.h
+++ b/src/PlatformOGL.h
@@ -1,9 +1,16 @@
 #ifndef PLATFORMOGL_H
 #define PLATFORMOGL_H
 
-// if you don't wanna use glad for your platform
-// add your header here!
+// If you don't wanna use glad for your platform,
+// define MELONDS_GL_HEADER to the path of some other header
+// that pulls in the necessary OpenGL declarations.
+// Make sure to include quotes or angle brackets as needed,
+// and that all targets get the same MELONDS_GL_HEADER definition.
 
-#include "frontend/glad/glad.h"
+#ifndef MELONDS_GL_HEADER
+#define MELONDS_GL_HEADER "\"frontend/glad/glad.h\""
+#endif
+
+#include MELONDS_GL_HEADER
 
 #endif
diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index 7409d056..9cf78542 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -237,3 +237,11 @@ if (UNIX AND NOT APPLE)
             INTERPROCEDURAL_OPTIMIZATION_RELEASE OFF)
     endif()
 endif()
+
+if (ENABLE_OGLRENDERER)
+    set(MELONDS_GL_HEADER \"frontend/glad/glad.h\" CACHE STRING "Path to a header that contains OpenGL function and type declarations.")
+
+    target_compile_definitions(melonDS PUBLIC OGLRENDERER_ENABLED)
+    target_compile_definitions(melonDS PUBLIC MELONDS_GL_HEADER=${MELONDS_GL_HEADER})
+    target_compile_definitions(core PUBLIC MELONDS_GL_HEADER=${MELONDS_GL_HEADER})
+endif()
\ No newline at end of file