tclcairo
Swig based binding for tcl for the cairo library. Can be used to produce, png, pdf, ps and svg files using the same API. Provided as a starkit for Tclkit 8.4, 8.5 and 8.6 with compiled binaries for Win32-x86 and Linux-x86
DDG - 2020-04-19: Updates for 64bit and Cairo 1.16
Example session:
usern@eibe(7:1441):mytcl$ tclkit-8.4.19 % source tclcairo1.10.2.kit % package require cairo 0.1 % glob tclcairo1.10.2.kit/lib/* tclcairo1.10.2.kit/lib/tclcairo1.10.2 glob tclcairo1.10.2.kit/lib/*/* tclcairo1.10.2.kit/lib/tclcairo1.10.2/cairo-test.tcl tclcairo1.10.2.kit/lib/tclcairo1.10.2/cairo.i tclcairo1.10.2.kit/lib/tclcairo1.10.2/libcairo.dll tclcairo1.10.2.kit/lib/tclcairo1.10.2/libcairo.so tclcairo1.10.2.kit/lib/tclcairo1.10.2/pkgIndex.tcl % lrange [lsort [info commands cairo::*]] 0 10 ::cairo::_cairo_path_data_t ::cairo::_cairo_path_data_t_header ::cairo::_cairo_path_data_t_header_get ::cairo::_cairo_path_data_t_header_length_get ::cairo::_cairo_path_data_t_header_length_set ::cairo::_cairo_path_data_t_header_type_get ::cairo::_cairo_path_data_t_header_type_set ::cairo::_cairo_path_data_t_point ::cairo::_cairo_path_data_t_point_get ::cairo::_cairo_path_data_t_point_x_get ::cairo::_cairo_path_data_t_point_x_set % source tclcairo1.10.2.kit/lib/tclcairo1.10.2/cairo-test.tcl % exit usern@eibe(7:1442):mytcl$ ls -lt | head insgesamt 55828 -rw-r--r-- 1 usern users 254 7. Mär 15:07 cairo-test2.png -rw-r--r-- 1 usern users 929 7. Mär 15:07 test.pdf -rw-r--r-- 1 usern users 2503 7. Mär 15:07 test.ps -rw-r--r-- 1 usern users 484 7. Mär 15:07 test.svg
If the library loading on windows fails try the larger windows starkit which contains as well cairo, zip and png shared libs.
Ok let's create a PDF-file having a red rectangle:
package require cairo set surface [::cairo::cairo_pdf_surface_create test.pdf 300 300] set cr [::cairo::cairo_create $surface] ::cairo::cairo_rectangle $cr 10 10 40 40 ::cairo::cairo_set_source_rgb $cr 1 1 1 ::cairo::cairo_fill $cr ::cairo::cairo_rectangle $cr 20 20 20 20 ::cairo::cairo_set_source_rgb $cr 1 0 0 ::cairo::cairo_fill $cr ::cairo::cairo_show_page $cr ::cairo::cairo_surface_flush $surface ::cairo::cairo_surface_destroy $surface ::cairo::cairo_destroy $cr
If you would like to create the same as svg just a replacemment of the first line is needed:
set surface [::cairo::cairo_svg_surface_create test.svg 300 300] set cr [::cairo::cairo_create $surface] ::cairo::cairo_rectangle $cr 10 10 40 40 ::cairo::cairo_set_source_rgb $cr 1 1 1 ::cairo::cairo_fill $cr ::cairo::cairo_rectangle $cr 20 20 20 20 ::cairo::cairo_set_source_rgb $cr 1 0 0 ::cairo::cairo_fill $cr ::cairo::cairo_show_page $cr ::cairo::cairo_surface_flush $surface ::cairo::cairo_surface_destroy $surface ::cairo::cairo_destroy $cr
You have to use the C-API documentation provided here: http://cairographics.org/manual/ A tcl wrapper using an OO-framework like Snit or Itcl would be greet in making it more Tcl-ish.
Swig wrapper
file: cairo.i
%module cairo
%{
#include <cairo-features.h>
#include <cairo.h>
#include <cairo-deprecated.h>
#include <cairo-version.h>
#include <cairo-pdf.h>
#include <cairo-ps.h>
#include <cairo-svg.h>
%}
%include "/usr/include/cairo/cairo-features.h"
%include "/usr/include/cairo/cairo.h"
%include "/usr/include/cairo/cairo-deprecated.h"
%include "/usr/include/cairo/cairo-version.h"
%include "/usr/include/cairo/cairo-pdf.h"
%include "/usr/include/cairo/cairo-svg.h"
%include "/usr/include/cairo/cairo-ps.h"This file is translated into c-code using swig and compiled using gcc and compressed using upx:
$ swig -tcl -namespace cairo.i $ gcc -shared -fPIC -DUSE_TCL_STUBS \ -I/usr/include/cairo -I/opt/tcl/include cairo_wrap.c -o libcairo.so \ -lcairo -L/opt/tcl/lib -ltclstub8.4 $ upx libcairo.so
As I could not compile cairo on OSX-X the starkit does not contain libraries for OS-X.