--- deliantra/Deliantra-Client/DC/OpenGL.pm	2007/07/21 16:07:53	1.6
+++ deliantra/Deliantra-Client/DC/OpenGL.pm	2007/08/19 15:57:40	1.11
@@ -9,6 +9,8 @@
 our $GL_VERSION;
 
 our $GL_NPOT;
+our $GL_COMPRESS;
+our $GL_BFSEP; # blendfuncseparate
 
 our $DEBUG = 1;
 our %INIT_HOOK;
@@ -31,8 +33,30 @@
    $GL_VERSION = gl_version * 1;
    %GL_EXT = map +($_ => 1), split /\s+/, gl_extensions;
 
-   $GL_NPOT = $GL_EXT{GL_ARB_texture_non_power_of_two} || $GL_VERSION >= 2;
-   $GL_NPOT = 0 if gl_vendor =~ /ATI Technologies/; # ATI doesn't get it right...
+   unless (defined $::CFG->{force_opengl11}) {
+      # try to find a suitable default
+      if (
+         $GL_VERSION >= 2.0
+         && (!$GL_EXT{GL_ARB_texture_non_power_of_two}
+             || !$GL_EXT{GL_EXT_blend_func_separate})
+     ) {
+        $::CFG->{force_opengl11} = 1;
+     } else {
+        $::CFG->{force_opengl11} = 0;
+     }
+   }
+
+   if ($::CFG->{force_opengl11}) {
+      $GL_VERSION = 1.1;
+      %GL_EXT = ();
+   }
+
+   $GL_BFSEP    = $GL_EXT{GL_EXT_blend_func_separate}      || $GL_VERSION >= 2.0;
+   $GL_NPOT     = $GL_EXT{GL_ARB_texture_non_power_of_two} || $GL_VERSION >= 2.0;
+   $GL_COMPRESS = $GL_EXT{GL_ARB_texture_compression}      || $GL_VERSION >= 1.3;
+
+   disable_GL_EXT_blend_func_separate
+      unless $GL_BFSEP;
 
    glDisable GL_COLOR_MATERIAL;
    glShadeModel GL_FLAT;
@@ -46,6 +70,7 @@
    glHint GL_LINE_SMOOTH_HINT           , $hint;
    glHint GL_POLYGON_SMOOTH_HINT        , $hint;
    glHint GL_GENERATE_MIPMAP_HINT       , $hint;
+   glHint GL_TEXTURE_COMPRESSION_HINT   , $hint;
    #glDrawBuffer GL_BACK;
    #glReadBuffer GL_BACK;