LuaJIT FFI Bindings to Haru – Free PDF Library. This library is almost done as you can see on TODO. Some missing API bindings will be added shortly, or on request.
- LuaJIT - original or OpenResty's branch
- libharu version 2.4 or later
-- Some local variable declarations
local dump = require "pl.pretty".dump
local haru = require "resty.haru"
local hpdf = haru.new()
local print = print
local pages = hpdf.pages
local fonts = hpdf.fonts
local images = hpdf.images
local encoders = hpdf.encoders
-- General Settings
hpdf:use "utfencodings"
hpdf:use "jpencodings"
hpdf:use "krencodings"
hpdf:use "cnsencodings"
hpdf:use "cntencodings"
hpdf:use "jpfonts"
hpdf:use "krfonts"
hpdf:use "cnsfonts"
hpdf:use "cntfonts"
-- Setting General Properties
hpdf.encoding = "UTF-8"
hpdf.pagelayout = "single"
hpdf.pagemode = "outline"
hpdf.author = "@bungle"
hpdf.creator = "lua-resty-haru"
hpdf.title = "Demo"
hpdf.subject = "Testing FFI Bindings"
hpdf.keywords = "openresty pdf haru lua luajit ffi"
hpdf.creationdate = { 2015, 1, 1, 12, 0, 0, '+', 2, 0 }
hpdf.modificationdate = {
year = 2015,
month = 1,
day = 1,
hour = 12,
minutes = 0,
seconds = 0,
ind = "+",
off_hour = 2,
off_minutes = 0
}
-- General Properties
print(hpdf.pagelayout)
print(hpdf.pagemode)
print(hpdf.author)
print(hpdf.creator)
print(hpdf.title)
print(hpdf.subject)
print(hpdf.keywords)
print(hpdf.creationdate)
print(hpdf.modificationdate)
-- Loading a Font
local helvetica = fonts:get "Helvetica"
-- Font Properties
print(helvetica.name)
print(helvetica.encoding)
print(helvetica.ascent)
print(helvetica.descent)
print(helvetica.xheight)
print(helvetica.capheight)
dump(helvetica.bbox)
-- Loading a TTF Font
local name = fonts:load("DejaVuSans.ttf", true)
print(name)
local dejavu = fonts:get(name, "UTF-8")
-- Font Properties
print(dejavu.name)
print(dejavu.encoding)
print(dejavu.ascent)
print(dejavu.descent)
print(dejavu.xheight)
print(dejavu.capheight)
dump(dejavu.bbox)
-- Current Encoder
local encoder = hpdf.encoder
-- Encoder Properties
print(encoder.type)
print(encoder.writingmode)
-- Getting an Encoder
local gbeuch = encoders:get "GB-EUC-H"
-- Encoder Properties
print(gbeuch.type)
print(gbeuch.writingmode)
-- Adding a Page
local page = pages:add()
-- Page Properties
print(page.width)
print(page.height)
print(page.grayfill)
print(page.graystroke)
print(page.charspace)
print(page.wordspace)
print(page.horizontalscaling)
print(page.textleading)
print(page.textrise)
print(page.textrenderingmode)
print(page.fontsize)
print(page.linewidth)
print(page.linecap)
print(page.linejoin)
print(page.flatness)
print(page.gmode)
print(page.gdepth)
print(page.strokingcolorspace)
print(page.fillingcolorspace)
dump(page.rgbfill)
dump(page.rgbstroke)
dump(page.cmykfill)
dump(page.cmykstroke)
dump(page.textmatrix)
dump(page.transmatrix)
dump(page.dash)
local x, y = page:pos()
print(x, y)
local x, y = page:textpos()
print(x, y)
-- Setting Page Properties
page.width = page.height
page.height = page.width
page.grayfill = page.grayfill
page.graystroke = page.graystroke
page.charspace = page.charspace
page.wordspace = page.wordspace
page.horizontalscaling = page.horizontalscaling
page.textleading = page.textleading
page.textrise = page.textrise
page.textrenderingmode = page.textrenderingmode
page.linewidth = page.linewidth
page.miterlimit = page.miterlimit
page.linecap = page.linecap
page.linejoin = page.linejoin
page.rgbfill = page.rgbfill
page.rgbstroke = page.rgbstroke
page.cmykfill = page.cmykfill
page.cmykstroke = page.cmykstroke
page.dash = page.dash
page.rotate = 90
-- Setting Page Size
page:size("a4", "landscape")
-- Inserting a new Page before existing
page = pages:insert(page)
-- Setting a Font
page:font(dejavu, 18)
-- Getting Current Font
local font = page:font()
print(font.name)
print(font.encoding)
print(font.ascent)
print(font.descent)
print(font.xheight)
print(font.capheight)
dump(font.bbox)
-- Writing Text
page:begintext()
page.textmatrix = page.textmatrix
page:text(50, 400, "Hello")
page:text(0, 400, 150, 200, "World", "right")
page:textmove(100, 300)
page:text "Testing"
page:ln()
page:text "... it works - How about UTF-8 ÄÖÅäöå€!"
page:text("Hey, I'm on a new line!", true)
page:endtext()
-- Writing Text (alternative)
page:begintext()
page.textmatrix = page.textmatrix
page:textout(50, 450, "Hello")
page:textrect(0, 450, 150, 200, "World", "right")
page:textmove(100, 150)
page:textshow "Testing"
page:textshow "... it works!"
page:textshow("Hey, I'm on a new line!", true)
page:endtext()
-- Measuring Text
print(page:textwidth("hello"))
-- Drawing Shapes
page:circle(100, 100, 50)
page:rectangle(150, 150, 100, 100)
page:ellipse(300, 300, 75, 50)
page:stroke()
-- Drawing Arcs
page:arc(400, 400, 50, 180, 360)
page:stroke()
-- Drawing Lines
page.linewidth = 10
page.linecap = "round"
page:move(200, 300)
page:line(400, 300)
page:closepathstroke()
-- Drawing Dashed Lines
page.linewidth = 2
page.linecap = "butt"
page.dash = {
pattern = { 8, 7, 2, 7 },
phase = 0,
n = 4
}
page:move(200, 600)
page:line(400, 600)
page:closepathstroke()
-- Drawing Curves
page.linewidth = 10
page.linecap = "round"
page.dash = nil
page:move(200, 300)
page:curve(400, 300, 500, 550, 400, 300)
page:stroke()
-- Loading a Image
local logo = images:load "logo.png"
-- Image Properties
print(logo.width)
print(logo.height)
print(logo.colorspace)
print(logo.bitspercomponent)
dump(logo.size)
-- Setting Image Properties
logo.colormask = {
rmin = 50,
rmax = 150,
gmin = 50,
gmax = 150,
bmin = 50,
bmax = 150
}
-- Drawing Image
page:image(logo, 450, 450, 100, 100)
-- Creating a Destination
local dest = page:destination();
-- Destination Properties
dest.xyz = { 10, 20, 10 }
dest.xyz = {
left = 10,
top = 20,
zoom = 10
}
-- Calling Destination Methods
dest:fit()
dest:fitb()
dest:fith(20)
dest:fitbh(20)
dest:fitbv(20)
dest:fitv(10)
dest:fitr(10, 20, 10, 20)
-- Creating Outline
local outline = hpdf:outline(nil, "Outline")
-- Setting Outline Properties
outline.destination = dest
outline.opened = true
-- Creating Annotation
local annotation = page:textannotation(10, 600, 200, 500, "Test Annotation")
-- Setting Annotation Properties
annotation.opened = true
annotation.icon = "help"
-- Setting Encryption and Permission
hpdf.password = {
owner = "owner",
user = "user"
}
hpdf.encryption = "r3"
hpdf.permission = "read"
hpdf.compression = "all"
-- Setting Page Labels
hpdf:pagelabel(0, "upperroman", 1, "");
-- Saving PDF
hpdf:save "demo.pdf"The most of the bindings are implemented, but there are a few that are still work in progress.
- HPDF_NewDoc
- HPDF_FreeDoc
- HPDF_SaveToStream
- HPDF_GetStreamSize
- HPDF_ReadFromStream
- HPDF_ResetStream
- HPDF_HasDoc
- HPDF_SetErrorHandler
- HPDF_GetError
- HPDF_ResetError
- HPDF_SetPagesConfiguration
- HPDF_SetOpenAction
- HPDF_LoadType1FontFromFile
- HPDF_LoadTTFontFromFile2
- HPDF_LoadPngImageFromFile2
- HPDF_LoadRawImageFromFile
- HPDF_LoadRawImageFromMem
- HPDF_LoadPngImageFromMem
- HPDF_LoadJpegImageFromMem
- HPDF_Page_CreateLinkAnnot
- HPDF_Page_CreateURILinkAnnot
- HPDF_Page_MeasureText
- HPDF_Page_SetSlideShow
- HPDF_Page_New_Content_Stream
- HPDF_Page_Insert_Shared_Content_Stream
- HPDF_Page_ExecuteXObject
- HPDF_Page_SetExtGState
- HPDF_Font_GetUnicodeWidth
- HPDF_Font_TextWidth
- HPDF_Font_MeasureText
- HPDF_Encoder_GetByteType
- HPDF_Encoder_GetUnicode
- HPDF_LinkAnnot_SetHighlightMode
- HPDF_LinkAnnot_SetBorderStyle
- HPDF_Annotation_SetBorderStyle
- HPDF_Image_SetMaskImage
lua-resty-haru uses two clause BSD license.
Copyright (c) 2016, Aapo Talvensaari
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