Revise glGenerateMipmap detection:

Link to glGenerateMipmap if gl_version >= 3 or GL_ARB_framebuffer_object is present. Fallback to glGenerateMipmapEXT if GL_EXT_framebuffer_object is present.
sezero · Aug 18, 2023 · 87ebe3a · 87ebe3a
1 parent 7f5deec
commit 87ebe3a
Showing 1 changed file with 13 additions and 4 deletions.
diff --git a/Quake/gl_vidsdl.c b/Quake/gl_vidsdl.c
@@ -1303,10 +1303,19 @@ static void GL_CheckExtensions (void)
 		Con_Warning ("glGenerateMipmap disabled at command line\n");
 	else
 	{
-		GL_GenerateMipmap = (QS_PFNGENERATEMIPMAP) SDL_GL_GetProcAddress("glGenerateMipmap");
-		if (GL_GenerateMipmap != NULL)
-			Con_Printf ("FOUND: glGenerateMipmap\n");
-		else
+		if (gl_version_major >= 3 || GL_ParseExtensionList(gl_extensions, "GL_ARB_framebuffer_object"))
+		{
+			GL_GenerateMipmap = (QS_PFNGENERATEMIPMAP) SDL_GL_GetProcAddress("glGenerateMipmap");
+			if (GL_GenerateMipmap != NULL)
+				Con_Printf ("FOUND: glGenerateMipmap\n");
+		}
+		else if (GL_ParseExtensionList(gl_extensions, "GL_EXT_framebuffer_object"))
+		{
+			GL_GenerateMipmap = (QS_PFNGENERATEMIPMAP) SDL_GL_GetProcAddress("glGenerateMipmapEXT");
+			if (GL_GenerateMipmap != NULL)
+				Con_Printf ("FOUND: glGenerateMipmapEXT\n");
+		}
+		if (GL_GenerateMipmap == NULL)
 			Con_Warning ("glGenerateMipmap not available, liquids won't have mipmaps\n");
 	}
 }