diff options
Diffstat (limited to 'Master/texmf-dist/tex/context/base/mkiv/grph-pat.lua')
-rw-r--r-- | Master/texmf-dist/tex/context/base/mkiv/grph-pat.lua | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/mkiv/grph-pat.lua b/Master/texmf-dist/tex/context/base/mkiv/grph-pat.lua new file mode 100644 index 00000000000..c5e4b9f64d1 --- /dev/null +++ b/Master/texmf-dist/tex/context/base/mkiv/grph-pat.lua @@ -0,0 +1,74 @@ +if not modules then modules = { } end modules ['grph-pat'] = { + version = 1.001, + comment = "companion to grph-pat.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +-- This is just a proof of concept. Viewers behave different (offsets) and Acrobat doesn't +-- show xform based patterns. +-- +-- This module will be cleaned up and use codeinjections and such. + +local texsetbox = tex.setbox +local texgetbox = tex.getbox + +local nodepool = nodes.pool +local new_literal = nodepool.pdforiginliteral -- really ? +local new_hlist = nodepool.hlist + +local names = { } + +interfaces.implement { + name = "registerpattern", + arguments = { { + { "name" }, + { "number", "integer" }, + { "width", "dimension" }, + { "height", "dimension" }, + { "hoffset", "dimension" }, + { "voffset", "dimension" }, + } }, + actions = function(specification) + local number = specification.number + local name = specification.name + local box = texgetbox(number) + if not name or name == "" then + return + end + nodes.handlers.finalize(box) + names[name] = lpdf.registerpattern { + number = number, + width = specification.width or box.width, + height = specification.height or (box.height + box.depth) , + hoffset = specification.hoffset, + voffset = specification.voffset, + } + end +} + +interfaces.implement { + name = "applypattern", + arguments = { { + { "name" }, + { "number", "integer" }, + { "width", "dimension" }, + { "height", "dimension" }, + } }, + actions = function(specification) + local number = specification.number + local name = specification.name + local width = specification.width + local height = specification.height + if not name or name == "" then + return + end + local p = names[name] + if p then + local l = new_literal(lpdf.patternstream(p,width,height)) + local h = new_hlist(l,width,height) + texsetbox(number,h) + end + end +} |