+ if_feature "libpng"
+ {
+ source "source/graphics/png";
+ };
+ if_feature "libjpeg"
+ {
+ source "source/graphics/jpeg";
+ };
+ if_feature "devil"
+ {
+ source "source/graphics/devil";
+ };
+ if_arch "windows"
+ {
+ overlay "windows";
+ if_feature "opengl"
+ {
+ overlay "wgl";
+ };
+ };
+ if_arch "darwin"
+ {
+ if_feature "quartz"
+ {
+ source "source/graphics/quartz";
+ };
+ overlay "cocoa";
+ if_feature "opengl"
+ {
+ overlay "cgl";
+ };
+ };
+ if_arch "!windows & !darwin"
+ {
+ overlay "x11";
+ if_feature "opengl"
+ {
+ overlay "glx";
+ };
+ };