GNOME Goal: Use cairo instead deprecated GDK api

Introduction

In GTK+ 3, the GDK drawing API (which closely mimics the X drawing API, which is itself modeled after PostScript) has been removed. All drawing in GTK+ 3 is done via cairo.

The GdkGC and GdkImage objects, as well as all the functions using them are gone. This includes the gdk_draw_ family of functions like gdk_draw_rectangle() and gdk_draw_drawable(). As GdkGC is roughly equivalent to cairo_t and GdkImage was used for drawing images to GdkDrawables, which cairo supports automatically, a transition is usually straightforward.

Guidelines

Follow the tips of the GTK+ documentation

Comments before approval

Add your comments to this goal proposal here

Status of this goal

$/!\$ Note: Updated automatical stats can be found at:
http://people.gnome.org/~fpeters/reports/gdkdraw.html
http://people.gnome.org/~fpeters/reports/gdkimage.html
http://people.gnome.org/~fpeters/reports/gdkgc.html

Tip: If you choose to work on a module, create the bug report on the GNOME bugzilla for the relevant module, and make it block bug 626688. This way people will know someone already works on it, and won't duplicate the work you're doing.

State	Markup
todo	`<: #ff8080> todo`
patch	`<: #ffcc50> [[GnomeBug:xxxxx\|patch]]`
done	`<: #80ff80> [[GnomeBug:xxxxx\|done]]`
not needed	`<: #80ff80> not needed`

Above are the states and corresponding markup to update the modules state table below.

Tarball	Status
Desktop
cheese	gtk_draw
dasher	GdkGC gtk_draw
ekiga	GdkGC gtk_draw
epiphany	GdkGC gtk_draw
eog	done gtk_draw
evince	not needed
evolution	GdkGC gtk_draw
gnome-applets	GdkGC gtk_draw
gnome-bluetooth	fixed in master
gnome-control-center	GdkGC gtk_draw
gnome-games	GdkImage GdkGC gtk_draw
gnome-desktop	GdkGC gtk_draw
gnome-mag	GdkImage GdkGC gtk_draw
gnome-panel	GdkGC gtk_draw
gnome-power-manager	GdkGC gtk_draw
gnome-screensaver	done
gnome-settings-daemon	fixed in master
gnome-system-monitor	GdkGC gtk_draw
gnome-system-tools	GdkGC gtk_draw
gnome-utils	GdkGC gtk_draw
gtk-engines	GdkGC gtk_draw
gtkhtml	GdkGC gtk_draw
gucharmap	GdkGC gtk_draw
libgnomekbd	gtk_draw
librsvg	GdkGC gtk_draw
libwnck	GdkGC gtk_draw
metacity	GdkGC gtk_draw
mousetweaks	GdkGC gtk_draw
mutter	GdkGC gtk_draw
nautilus	GdkGC gtk_draw
totem	gtk_draw
vinagre	GdkGC gtk_draw
Development Tools
anjuta	GdkGC gtk_draw
gdl	GdkGC gtk_draw
glade3	GdkGC gtk_draw
gnome-devel-docs	GdkGC gtk_draw
External Dependencies
gtk-vnc	GdkImage GdkGC gtk_draw
libgda	GdkGC gtk_draw
poppler	GdkGC gtk_draw	only test programs, work around with --disable-gtk-test
webkit	fixed in 1.3.4
Other
GParted	not needed
Planner	to do
xchat-gnome	GdkImage