Use Windows (TTF) font in R graphics
Is it possible to use a TTF font in R? Is the cairo package intended for this task? How would a minimal example look like? ...
cairo
Why is my simple python gtk+cairo program running so slowly/stutteringly?
My program draws circles moving on the window. I think I must be missing some basic gtk/cairo concept because it seems to be running too slowly/stutteringly for what I am doing. Any ideas? Thanks for any help! #!/usr/bin/python import gtk import gtk.gdk as gdk import math import random import gobject # The number of circles and the w...
Aligning two PDFs for a merge using Cairo and pyPDF
I need to programmatically add additional graphical elements onto an existing, static PDF book cover. Right now I use pycairo to draw onto a transparent PDFSurface, then merge it into the existing static PDF using pyPdf. This way, the PDFSurface works as an overlay. However, the transparent PDF is exactly the same size as the static PDF...
How can I "best fit" an arbitrary cairo (pycairo) path?
It seems like given the information in stroke_extents() and the translate(x, y) and scale(x, y) functions, I should be able to take any arbitrary cairo (I'm using pycairo) path and "best fit" it. In other words, center it and expand it to fill the available space. Before drawing the path, I have scaled the canvas such that the origin is...
Disappearing characters in cairo font rendering
I use cairo to render a simple text onto a cairo surface. I use a freetype font for that (Vera.ttf if that matters). It works, but sometimes characters disappear from the output. In fact only the numbers. I drew a text 'Demostream 1..' and sometimes the '1' disappears from the output and I have absolutely no idea why. The number is defit...
How do I render *parts* of a svg file?
Hello good people! :) I want to render parts of a svg file by name but for the life of me I cannot figure out how to do so (using python + gtk). Here's the svg file in question: http://david.bellot.free.fr/svg-cards/files/SVG-cards-2.0.1.tar.gz (Update: this file no longer exists, but you can track it down at http://svg-cards.sourcefor...
How to get cmake's PKG_CHECK_MODULES to find my cairo library in Windows
I'm trying to build OpenSceneGraph's pdf plugin on a win32 box. The plugin is using cmake's PKG_CHECK_MODULES macro to find cairo and poppler libraries. I don't know how to install these in such a way as to help it find them though. ...
Gtk Draw Bitmap
I want to draw an image on a window using Cairo. How can I load a bmp or png from disk and create a brush from it? The code below shows where drawing should be made. The expose signal is attached to the window. gboolean OnExpose(GtkWidget *widget, GdkEventExpose *event, gpointer data) { cairo_t *cr; cr = gdk_cairo_create(wi...
GTK:Button onHover effect different on Linux and Windows
Hi, I have a GTK button on my GUI app, however, the hover effects are different for both Linux and Windows: Heres Linux: http://imgur.com/DKAy6 Heres Windows: http://imgur.com/v0FFU I did not do anything fancy to the animations, in fact, the animation is default, how can I make it uniform? Thank you. ...
Installing unpacked ruby gem.
Hey there, I am trying to install the cairo ruby gem on OSX 10.6. There seems to be a bug in the extconf.rb, which I've patched, but now I don't know how to create a gem, so I can install it... gem build folder won't work because there is no gemspec file or whatever (I've got absolutely no experience with gems^^), and gem install wants ...
Drawing a clamped uniform cubic B-spline using Cairo
I have a bunch of coordinates which are the control points of a clamped uniform cubic B-spline on the 2D plane. I would like to draw this curve using Cairo calls (in Python, using Cairo's Python bindings), but as far as I know, Cairo supports Bézier curves only. I also know that the segments of a B-spline between two control points can b...
Pango-WARNING **: failed to choose a font, expect ugly output.
I'm getting this error when starting anything that uses the Pango library. I'm using Kubuntu 9.10. I've done 'sudo apt-get --reinstall install' on libgtk* libcairo* libpango* and fontconfig, with no luck. Could someone point me in the right direction? Thanks. ...
Having problems building Cairo on x64 CentOS
I've done this many times on 32 bit CentOS and everything went ok without a hitch. But now, on x64 CentOS, I can't get cairo to find pixman. Pixman 0.18.0 is installed in /usr/local/lib (which I believe is the usual location). Configure for Cairo 1.8.10 can't find it: checking for cairo's image surface backend feature... checking for ...
Shaped windows in gtkmm
How do I create shaped windows in Gtkmm. The shape must be defined using cairomm. ...
How to get a glyph outline of a true type character on a linux system
Hello, I'm searching for a library to get the outline of a glyph in a true type font on a linux system. We are using Pango and Cairo but unfortunatly I didn't find anything. I'm looking for somethig similar to GlyphTypeface.GetGlyphOutline under .NET Any help or hints are appreciated! Thanks in advance ...
Rare PyCairo antialias getting directly the surface data
After create a Pycairo context and surface (ImageSurface) I get a diferent export results if I get directly from surface buffer surface.get_data() or from PNG export method surface.write_to_png() The context antialias flag is obviously the same and, yes, the get_data method result has antialiasing, but with much poorer quality. Wh...
python: open file, feed line to list, process list data
I want to process the data in the file "output.log" and feed it to graphdata['eth0] I have done this but it process only the first line: logread = open("output.log", "r").readlines() for line in logread: print "line", line i = line.rstrip("\n") b = float(i) colors = [ (0.2, 03, .65), (0.5, 0.7, .1), (.35...
python cairoplot store previous readings..
hi, i am using cairoplot, to make graphs, however the file from where i am reading the data is growing huge and its taking a long time to process the graph is there any real-time way to produce cairo graph, or at least store the previous readings..like rrd. -krisdigitx ...
How to keep text inside a circle using Cairo?
I a drawing a graph using Cairo (pycairo specifically) and I need to know how can I draw text inside a circle without overlapping it, by keeping it inside the bounds of the circle. I have this simple code snippet that draws a letter "a" inside the circle: ''' Created on May 8, 2010 @author: mrios ''' import cairo, math WIDTH, HEIGHT =...
Multiple GTK windows with Cairo graphics
I've got a GTK graphics window showing communcation between various devices, and I'd like to bring up another window giving more detail when the user clicks on one of the devices. I'm using pixbufs for the drawing, and the windows won't be modal. What's the simplest way to bring up more windows that can overlap and be moved around inde...