REVIEWED: `rlGenTextureMipmaps()`, GPU generation only

src/rlgl.h

@@ -3248,6 +3248,7 @@ void rlUnloadTexture(unsigned int id)
 // NOTE: Only supports GPU mipmap generation
 void rlGenTextureMipmaps(unsigned int id, int width, int height, int format, int *mipmaps)
 {
+#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
     glBindTexture(GL_TEXTURE_2D, id);
 
     // Check if texture is power-of-two (POT)
@@ -3256,7 +3257,6 @@ void rlGenTextureMipmaps(unsigned int id, int width, int height, int format, int
     if (((width > 0) && ((width & (width - 1)) == 0)) &&
         ((height > 0) && ((height & (height - 1)) == 0))) texIsPOT = true;
 
-#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
     if ((texIsPOT) || (RLGL.ExtSupported.texNPOT))
     {
         //glHint(GL_GENERATE_MIPMAP_HINT, GL_DONT_CARE);   // Hint for mipmaps generation algorithm: GL_FASTEST, GL_NICEST, GL_DONT_CARE
@@ -3268,10 +3268,12 @@ void rlGenTextureMipmaps(unsigned int id, int width, int height, int format, int
         *mipmaps = 1 + (int)floor(log(MAX(width, height))/log(2));
         TRACELOG(RL_LOG_INFO, "TEXTURE: [ID %i] Mipmaps generated automatically, total: %i", id, *mipmaps);
     }
-#endif
     else TRACELOG(RL_LOG_WARNING, "TEXTURE: [ID %i] Failed to generate mipmaps", id);
 
     glBindTexture(GL_TEXTURE_2D, 0);
+#else
+    TRACELOG(RL_LOG_WARNING, "TEXTURE: [ID %i] GPU mipmap generation not supported", id);
+#endif
 }