mdw@git.distorted.org.uk Git - clg/blob - gdk/alien/glue.c

   1 /* Common Lisp bindings for GTK+ v2.x
   2  * Copyright 1999-2007 Espen S. Johnsen <espen@users.sf.net>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  19  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  20  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  21  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /* $Id: glue.c,v 1.9 2008-11-06 17:27:39 espen Exp $ */
  25
  26
  27 #include <gdk/gdk.h>
  28 #include <gdk-pixbuf/gdk-pixbuf.h>
  29
  30 #ifdef GDK_WINDOWING_X11
  31 #include <gdk/gdkx.h>
  32 #elif defined (G_OS_WIN32)
  33 #include <gdk/gdkwin32.h>
  34 #endif
  35
  36 gint clg_gdk_connection_number (GdkDisplay *display)
  37 {
  38 #ifdef GDK_WINDOWING_X11
  39   return ConnectionNumber (GDK_DISPLAY_XDISPLAY (display));
  40 #else
  41   return -1;
  42 #endif
  43 }
  44
  45
  46 GdkWindow *clg_gdk_cairo_surface_get_window (cairo_surface_t *surface)
  47 {
  48   /* If 'surface_info_key' had been public we would have had a
  49      portable way to find the GdkWindow of a Cairo surface. */
  50
  51 #ifdef GDK_WINDOWING_X11
  52   g_return_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_XLIB);
  53
  54   Display* display = cairo_xlib_surface_get_display (surface);
  55   if (display) {
  56     Drawable window = cairo_xlib_surface_get_drawable (surface);
  57     if (window)
  58       return gdk_window_lookup_for_display (window, display);
  59   }
  60
  61   return NULL;
  62 #elif defined (G_OS_WIN32)
  63   HDC hdc = (HDC)cairo_win32_surface_get_dc (surface);
  64   if (hdc)
  65     return gdk_window_lookup ((GdkNativeWindow)hdc);
  66   else
  67     return NULL;
  68 #else
  69   return NULL;
  70 #endif
  71 }
  72
  73 void clg_gdk_pixbuf_swap_rgb (GdkPixbuf *pixbuf)
  74 {
  75
  76   int n_channels = gdk_pixbuf_get_n_channels (pixbuf);
  77   guchar *p, *pixels = gdk_pixbuf_get_pixels (pixbuf);
  78   int width = gdk_pixbuf_get_width (pixbuf);
  79   int height = gdk_pixbuf_get_height (pixbuf);
  80   int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
  81   int x, y;
  82
  83   g_assert (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8);
  84   g_assert (gdk_pixbuf_get_has_alpha (pixbuf));
  85   g_assert (n_channels == 4);
  86
  87   for (y = 0; y < height; y++) {
  88     for (x = 0; x < width; x++) {
  89       p = pixels + y * rowstride + x * n_channels;
  90       guint tmp = p[0];
  91       p[0] = p[2];
  92       p[2] = tmp;
  93     }
  94   }
  95 }
  96