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Diffstat (limited to 'utils/viewer-x.c')
| -rw-r--r-- | utils/viewer-x.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/utils/viewer-x.c b/utils/viewer-x.c new file mode 100644 index 00000000..ad1c9a8d --- /dev/null +++ b/utils/viewer-x.c @@ -0,0 +1,234 @@ +/* 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 G_GNUC_UNUSED) +{ + XViewer *x = (XViewer *)instance; + + x->display = XOpenDisplay (NULL); + if (!x->display) + fail ("Cannot open display %s", 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 annotate_keycode; + + /* 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); + + annotate_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 GINT_TO_POINTER (-1); + else if (xev.xkey.keycode == annotate_keycode) + { + return GUINT_TO_POINTER (GPOINTER_TO_INT (state) + 1); + } + 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 +}; |