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Diffstat (limited to 'doc/expert/pre_prep')
| -rw-r--r-- | doc/expert/pre_prep | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/doc/expert/pre_prep b/doc/expert/pre_prep new file mode 100644 index 0000000..d53845b --- /dev/null +++ b/doc/expert/pre_prep @@ -0,0 +1,24 @@ +@Section + @Tag { prependgraphic } + @Title { "@PrependGraphic and @SysPrependGraphic" } +@Begin +@PP +prependgraphic.sym @Index { @@PrependGraphic symbol } +sysprependgraphic.sym @Index { @@SysPrependGraphic symbol } +postscript.prependgraphic @SubIndex { used by @@PrependGraphic } +These symbols, which may appear anywhere that a definition or @@Use +symbol may appear, tell Lout to include the contents of a file in the +preamble of its output. For Basser Lout this means that the file must +contain PostScript (and ideally it would begin and end with the +@Code "%%BeginResource" and @Code "%%EndResource" comments of +DSC 3.0). For example, +@ID @Code { +"@SysPrependGraphic { diagf.lpg }" +} +appears at the start of the Diag package; the file @Code diagf.lpg +contains a number of PostScript definitions used by Diag for drawing +diagrams. It saves a lot of space to include them just once at the +start like this, rather than with every diagram. @@PrependGraphic and +@@SysPrependGraphic search for the file in the same places as @@Include and +@@SysInclude respectively. +@End @Section |