Re: [newbie] How to plot to drawing_area
- From: "Individual . ." <individual mi cl>
- To: gtk-app-devel-list gnome org
- Subject: Re: [newbie] How to plot to drawing_area
- Date: Sun, 2 Feb 2003 12:23:03 -0300
On Sunday, February 2, 2003, at 09:57 AM, Roland Smith wrote:
Plotting pixel by pixel is _slow_. It's better to use GdkRGB, e.g.
using
gdk_draw_rgb_image(). What you have to do is read from the png file to
a buffer
containing an array of rgb values. This is then drawn to a drawable.
See the
example in the GDK manual.
Ah! yes, speed is important.
I shall look at that example. I've also started learning about Xlib and
making a window directly, bypassing Gtk, and I seem to be close to
achieving what I want. That said, I really don't know if what I am
doing is at all efficient.
Paul
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