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/* viewer-x.c: Common code for X-based viewers
*
* Copyright (C) 1999,2004,2005 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 <config.h>
#include <string.h>
#include "viewer-render.h"
#include "viewer-x.h"
void
x_view_init (gpointer instance,
const PangoViewer *klass)
{
XViewer *x = (XViewer *)instance;
x->display = XOpenDisplay (NULL);
if (!x->display)
fail ("Cannot open display %s\n", XDisplayName (NULL));
x->screen = DefaultScreen (x->display);
}
gpointer
x_view_create (const PangoViewer *klass)
{
XViewer *instance;
instance = g_slice_new (XViewer);
x_view_init (instance, klass);
return instance;
}
void
x_view_destroy (gpointer instance)
{
XViewer *x = (XViewer *)instance;
XCloseDisplay (x->display);
g_slice_free (XViewer, instance);
}
gpointer
x_view_create_surface (gpointer instance,
int width,
int height)
{
XViewer *x = (XViewer *) instance;
Pixmap pixmap;
pixmap = XCreatePixmap (x->display, DefaultRootWindow (x->display), width, height,
DefaultDepth (x->display, x->screen));
return (gpointer) pixmap;
}
void
x_view_destroy_surface (gpointer instance,
gpointer surface)
{
XViewer *x = (XViewer *) instance;
Pixmap pixmap = (Pixmap) surface;
XFreePixmap (x->display, pixmap);
}
static void
update (Display *display,
Pixmap pixmap,
Window window,
Region *update_region)
{
GC gc;
XRectangle extents;
XClipBox (*update_region, &extents);
gc = XCreateGC (display, pixmap, 0, NULL);
XCopyArea (display, pixmap, window, gc,
extents.x, extents.y,
extents.width, extents.height,
extents.x, extents.y);
XFreeGC (display, gc);
XDestroyRegion (*update_region);
*update_region = NULL;
}
static void
expose (XExposeEvent *xev,
Region *update_region)
{
XRectangle r;
if (!*update_region)
*update_region = XCreateRegion ();
r.x = xev->x;
r.y = xev->y;
r.width = xev->width;
r.height = xev->height;
XUnionRectWithRegion (&r, *update_region, *update_region);
}
gpointer
x_view_create_window (gpointer instance,
const char *title,
int width,
int height)
{
XViewer *x = (XViewer *) instance;
unsigned long bg;
Window window;
XSizeHints size_hints;
bg = WhitePixel (x->display, x->screen);
window = XCreateSimpleWindow (x->display, DefaultRootWindow (x->display),
0, 0, width, height, 0,
bg, bg);
XSelectInput (x->display, window, ExposureMask | KeyPressMask);
XMapWindow (x->display, window);
XmbSetWMProperties (x->display, window,
title,
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 (x->display, window, &size_hints);
return (gpointer) window;
}
void
x_view_destroy_window (gpointer instance,
gpointer window)
{
XViewer *x = (XViewer *) instance;
Window win = (Window) window;
XDestroyWindow (x->display, win);
}
gpointer
x_view_display (gpointer instance,
gpointer surface,
gpointer win,
int width,
int height,
gpointer state)
{
XViewer *x = (XViewer *) instance;
Pixmap pixmap = (Pixmap) surface;
Window window = (Window) win;
XEvent xev;
XRectangle r;
Region update_region;
unsigned int quit_keycode;
unsigned int borders_keycode;
gboolean show_borders = FALSE;
if (state)
show_borders = GPOINTER_TO_UINT (state) == 0xdeadbeef;
/* force a full redraw */
update_region = XCreateRegion ();
r.x = 0;
r.y = 0;
r.width = width;
r.height = height;
XUnionRectWithRegion (&r, update_region, update_region);
borders_keycode = XKeysymToKeycode(x->display, 'B');
quit_keycode = XKeysymToKeycode(x->display, 'Q');
while (1)
{
if (!XPending (x->display) && update_region)
update (x->display, pixmap, window, &update_region);
XNextEvent (x->display, &xev);
switch (xev.xany.type) {
case KeyPress:
if (xev.xkey.keycode == quit_keycode)
return NULL;
else if (xev.xkey.keycode == borders_keycode)
{
show_borders = !show_borders;
return GUINT_TO_POINTER (show_borders ? 0xdeadbeef : 0xbe);
}
break;
case Expose:
expose (&xev.xexpose, &update_region);
break;
}
}
}
const PangoViewer x_viewer = {
"X",
NULL,
NULL,
x_view_create,
x_view_destroy,
NULL,
x_view_create_surface,
x_view_destroy_surface,
NULL,
NULL,
x_view_create_window,
x_view_destroy_window,
x_view_display
};
const PangoViewer *fallback_viewer = &x_viewer;
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