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/* Pango
* pangoft2topgm.c: Example program to view a UTF-8 encoding file
* using Pango to render result.
*
* Copyright (C) 1999,2004 Red Hat, Inc.
* Copyright (C) 2001 Sun Microsystems
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "renderdemo.h"
#include <pango/pangoxft.h>
static Region update_region = NULL;
static XftDraw *draw;
static PangoContext *context;
static void
xft_render (PangoLayout *layout,
int x,
int y,
gpointer data)
{
XftColor color;
color.color.red = 0x0;
color.color.green = 0x0;
color.color.blue = 0x0;
color.color.alpha = 0xffff;
pango_xft_render_layout (draw, &color, layout, x, y);
}
void
update ()
{
XRectangle area;
XftColor color;
XClipBox (update_region, &area);
XftDrawSetClip (draw, update_region);
XDestroyRegion (update_region);
update_region = NULL;
color.color.red = 0xffff;
color.color.blue = 0xffff;
color.color.green = 0xffff;
color.color.alpha = 0xffff;
XftDrawRect (draw, &color,
area.x, area.y, area.width, area.height);
do_output (context, xft_render, NULL, draw, NULL, NULL);
}
void
expose (XExposeEvent *xev)
{
XRectangle area;
if (!update_region)
update_region = XCreateRegion ();
area.x = xev->x;
area.y = xev->y;
area.width = xev->width;
area.height = xev->height;
XUnionRectWithRegion (&area, update_region, update_region);
}
int main (int argc, char **argv)
{
Display *display;
int screen;
Window window;
XEvent xev;
unsigned long bg;
int width, height;
XSizeHints size_hints;
g_type_init();
XftInit (NULL);
parse_options (argc, argv);
display = XOpenDisplay (NULL);
if (!display)
fail ("Cannot open display %s\n", XDisplayName (NULL));
screen = DefaultScreen (display);
bg = WhitePixel (display, screen);
context = pango_xft_get_context (display, screen);
do_output (context, NULL, NULL, NULL, &width, &height);
window = XCreateSimpleWindow (display, DefaultRootWindow (display),
0, 0, width, height, 0,
bg, bg);
XSelectInput (display, window, ExposureMask);
XMapWindow (display, window);
draw = XftDrawCreate (display, window,
DefaultVisual (display, screen),
DefaultColormap (display, screen));
XmbSetWMProperties (display, window,
get_options_string (),
NULL, NULL, 0, NULL, NULL, NULL);
memset ((char *)&size_hints, 0, sizeof (XSizeHints));
size_hints.flags = PSize | PMaxSize;
size_hints.width = width; size_hints.height = height; /* for compat only */
size_hints.max_width = width; size_hints.max_height = height;
XSetWMNormalHints (display, window, &size_hints);
while (1)
{
if (!XPending (display) && update_region)
update ();
XNextEvent (display, &xev);
if (xev.xany.type == Expose)
{
expose (&xev.xexpose);
}
}
return 0;
}
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