Re: gnomeprint orientación horizontal

[Claudio Saavedra <csaavedra alumnos utalca cl>]

On Wed, 2007-01-17 at 18:24 -0300, Alejandro Valdes Jimenez wrote:
> 
> tienes algun ejemplo por ahi?

Para texto, gtk-demo tiene un ejemplo de un programa que se imprime a si
mismo. Para im�nes, revisa este programita hecho en cairo. Es m�de
lo que necesitar� con GtkPrint, pero te da la idea. El archivo
shell/eog-window.c del EOG es un ejemplo m�completo.

Claudio

-- 
Claudio Saavedra <csaavedra alumnos utalca cl>

/** Author: Claudio Saavedra <csaavedra alumnos utalca cl>
    Public domain.
**/

#include <cairo.h>
#include <cairo-pdf.h>
#include <glib.h>
#include <gdk/gdk.h>

int
main (int argc, char **argv)
{
	GdkPixbuf *pixbuf;
	gint width, height;
	gdouble p_width, p_height;
	gdouble scale_factor;
	GError *error = NULL;
	cairo_surface_t *surface;
	cairo_t *cr;
	cairo_pattern_t *pattern;

	if (argc < 2)
		return 1;

	g_type_init ();
	
	pixbuf = gdk_pixbuf_new_from_file (argv[1], &error);
	if (error != NULL) {
		g_warning ("Couldn't load image: %s", error->message);
		g_error_free (error);
		return 1;
	}

	width = gdk_pixbuf_get_width (pixbuf);
	height = gdk_pixbuf_get_height (pixbuf);

	p_width =  72 * 8.50;
	p_height = 72 * 11.0;

	/* create a PDF surface of letter page size */
	surface = cairo_pdf_surface_create ("output.pdf", p_width, p_height);
	cr = cairo_create (surface);
	
	if (p_width > width && p_height > height) {
		cairo_translate (cr, (p_width - width)/2, 
				 (p_height - height)/2);
	} else if (width > height && width > p_width) {
		scale_factor = ((gdouble)p_width)/width;
		cairo_scale (cr, scale_factor, scale_factor);
		cairo_translate (cr, 0, (p_height/scale_factor - height)/2);
	} else {
		scale_factor = ((gdouble)p_height)/height;
		cairo_scale (cr, scale_factor, scale_factor);
		cairo_translate (cr, (p_width/scale_factor - width)/2, 0);
	}

	/* this is a workaround for a bug in cairo's PDF backend */
	cairo_rectangle (cr, 0, 0, width, height);
	cairo_clip (cr);
	
	gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
	cairo_paint (cr);
	cairo_show_page (cr);
	cairo_surface_finish (surface);
	g_object_unref (G_OBJECT (pixbuf));
	
	return 0;
}