From 095319602c26cf5adfcfbae243c8a65692d43035 Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Wed, 6 Aug 2025 13:09:56 +0200
Subject: [PATCH] REVIEWED: Compule for OpenGL 1.1 #5088

---
 src/rlgl.h | 48 +++++++++++++++++++++++++++---------------------
 1 file changed, 27 insertions(+), 21 deletions(-)

diff --git a/src/rlgl.h b/src/rlgl.h
index 2adf1753d..e83cb55a7 100644
--- a/src/rlgl.h
+++ b/src/rlgl.h
@@ -1157,16 +1157,16 @@ static const char *rlGetCompressedFormatName(int format); // Get compressed form
 
 static int rlGetPixelDataSize(int width, int height, int format);   // Get pixel data size in bytes (image or texture)
 
+static Matrix rlMatrixIdentity(void);                       // Get identity matrix
+#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
 // Auxiliar matrix math functions
-typedef struct rl_float16 {
-    float v[16];
-} rl_float16;
+typedef struct rl_float16 { float v[16]; } rl_float16;
 static rl_float16 rlMatrixToFloatV(Matrix mat);             // Get float array of matrix data
 #define rlMatrixToFloat(mat) (rlMatrixToFloatV(mat).v)      // Get float vector for Matrix
-static Matrix rlMatrixIdentity(void);                       // Get identity matrix
 static Matrix rlMatrixMultiply(Matrix left, Matrix right);  // Multiply two matrices
 static Matrix rlMatrixTranspose(Matrix mat);                // Transposes provided matrix
 static Matrix rlMatrixInvert(Matrix mat);                   // Invert provided matrix
+#endif
 
 //----------------------------------------------------------------------------------
 // Module Functions Definition - Matrix operations
@@ -2571,9 +2571,9 @@ void rlLoadExtensions(void *loader)
     TRACELOG(RL_LOG_INFO, "    > Version:  %s", glGetString(GL_VERSION));
     TRACELOG(RL_LOG_INFO, "    > GLSL:     %s", glGetString(GL_SHADING_LANGUAGE_VERSION));
 
-    RLGL.loader = (rlglLoadProc)loader;
-
 #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
+    RLGL.loader = (rlglLoadProc)loader;
+    
     // NOTE: Anisotropy levels capability is an extension
     #ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT
         #define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
@@ -2632,8 +2632,13 @@ void rlLoadExtensions(void *loader)
 }
 
 // Get OpenGL procedure address
-void *rlGetProcAddress(const char *procName) {
-    return RLGL.loader(procName);
+void *rlGetProcAddress(const char *procName)
+{
+    void *func = NULL;
+#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
+    func = RLGL.loader(procName);
+#endif
+    return func;
 }
 
 // Get current OpenGL version
@@ -5140,7 +5145,20 @@ static int rlGetPixelDataSize(int width, int height, int format)
 }
 
 // Auxiliar math functions
+//-------------------------------------------------------------------------------
+// Get identity matrix
+static Matrix rlMatrixIdentity(void)
+{
+    Matrix result = {
+        1.0f, 0.0f, 0.0f, 0.0f,
+        0.0f, 1.0f, 0.0f, 0.0f,
+        0.0f, 0.0f, 1.0f, 0.0f,
+        0.0f, 0.0f, 0.0f, 1.0f
+    };
 
+    return result;
+}
+#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
 // Get float array of matrix data
 static rl_float16 rlMatrixToFloatV(Matrix mat)
 {
@@ -5166,19 +5184,6 @@ static rl_float16 rlMatrixToFloatV(Matrix mat)
     return result;
 }
 
-// Get identity matrix
-static Matrix rlMatrixIdentity(void)
-{
-    Matrix result = {
-        1.0f, 0.0f, 0.0f, 0.0f,
-        0.0f, 1.0f, 0.0f, 0.0f,
-        0.0f, 0.0f, 1.0f, 0.0f,
-        0.0f, 0.0f, 0.0f, 1.0f
-    };
-
-    return result;
-}
-
 // Get two matrix multiplication
 // NOTE: When multiplying matrices... the order matters!
 static Matrix rlMatrixMultiply(Matrix left, Matrix right)
@@ -5276,5 +5281,6 @@ static Matrix rlMatrixInvert(Matrix mat)
 
     return result;
 }
+#endif
 
 #endif  // RLGL_IMPLEMENTATION