Ah, I just found out the solution is trivial.
GdkPixmap *pixmap;
/* Create a new backing pixmap of the appropriate size */
static gint
configure_event (GtkWidget *widget, GdkEventConfigure *event)
{
cairo_t *cr;
if (pixmap)
gdk_pixmap_unref(pixmap);
pixmap =
Hi,
On Sat, 2007-05-19 at 13:41 +0200, control H wrote:
Hi,
I'm planning to make my app use cairo instead of GDK based functions.
I'm using a drawing area, which draws into a pixmap when the
configure event is emitted, and copies the relevant part of the
pixmap back on the screen on the
The signal handler for the expose event is passed some parameters
specifying which part of the screen has become invalidated. If you use
these in a Cairo drawing mask, then redraw your canvas, it should be
quite fast, as Cairo will ignore all operations to areas outside the
mask.
But this
On Sat, 2007-05-19 at 14:12 +0200, control H wrote:
The signal handler for the expose event is passed some parameters
specifying which part of the screen has become invalidated. If you use
these in a Cairo drawing mask, then redraw your canvas, it should be
quite fast, as Cairo will ignore
