[Freeciv-Dev] (PR#12430) xaw client not starting up
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<URL: http://bugs.freeciv.org/Ticket/Display.html?id=12430 >
According to some docs I found
http://tronche.com/gui/x/xlib/pixmap-and-cursor/XCreatePixmapCursor.html
the cursor bitmaps must be in a very specific form. The pixmap/mask
form of the sprite is quite wrong and will need to be hand-converted.
Alternately/better this code should be changed to use
XcursorImageLoadCursor (which is what GDK does). See
create_cursor_image() and gdk_cursor_new_from_pixbuf() in the attached file.
-jason
/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <config.h>
#include <X11/Xlib.h>
#include <X11/cursorfont.h>
#ifdef HAVE_XCURSOR
#include <X11/Xcursor/Xcursor.h>
#endif
#include "gdkprivate-x11.h"
#include "gdkcursor.h"
#include "gdkpixmap-x11.h"
#include "gdkx.h"
#include <gdk/gdkpixmap.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
/**
* gdk_cursor_new_for_display:
* @display: the #GdkDisplay for which the cursor will be created
* @cursor_type: cursor to create
*
* Creates a new cursor from the set of builtin cursors.
* Some useful ones are:
* <itemizedlist>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="right_ptr.png"></inlinegraphic>
#GDK_RIGHT_PTR (right-facing arrow)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="crosshair.png"></inlinegraphic>
#GDK_CROSSHAIR (crosshair)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="xterm.png"></inlinegraphic> #GDK_XTERM
(I-beam)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="watch.png"></inlinegraphic> #GDK_WATCH
(busy)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="fleur.png"></inlinegraphic> #GDK_FLEUR
(for moving objects)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="hand1.png"></inlinegraphic> #GDK_HAND1
(a right-pointing hand)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="hand2.png"></inlinegraphic> #GDK_HAND2
(a left-pointing hand)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="left_side.png"></inlinegraphic>
#GDK_LEFT_SIDE (resize left side)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="right_side.png"></inlinegraphic>
#GDK_RIGHT_SIDE (resize right side)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="top_left_corner.png"></inlinegraphic>
#GDK_TOP_LEFT_CORNER (resize northwest corner)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="top_right_corner.png"></inlinegraphic>
#GDK_TOP_RIGHT_CORNER (resize northeast corner)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG"
fileref="bottom_left_corner.png"></inlinegraphic> #GDK_BOTTOM_LEFT_CORNER
(resize southwest corner)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG"
fileref="bottom_right_corner.png"></inlinegraphic> #GDK_BOTTOM_RIGHT_CORNER
(resize southeast corner)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="top_side.png"></inlinegraphic>
#GDK_TOP_SIDE (resize top side)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="bottom_side.png"></inlinegraphic>
#GDK_BOTTOM_SIDE (resize bottom side)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="sb_h_double_arrow.png"></inlinegraphic>
#GDK_SB_H_DOUBLE_ARROW (move vertical splitter)
* </para></listitem>
* <listitem><para>
* <inlinegraphic format="PNG" fileref="sb_v_double_arrow.png"></inlinegraphic>
#GDK_SB_V_DOUBLE_ARROW (move horizontal splitter)
* </para></listitem>
* </itemizedlist>
*
* To make the cursor invisible, use gdk_cursor_new_from_pixmap() to create
* a cursor with no pixels in it.
*
* Return value: a new #GdkCursor
*
* Since: 2.2
**/
GdkCursor*
gdk_cursor_new_for_display (GdkDisplay *display,
GdkCursorType cursor_type)
{
GdkCursorPrivate *private;
GdkCursor *cursor;
Cursor xcursor;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
if (display->closed)
xcursor = None;
else
xcursor = XCreateFontCursor (GDK_DISPLAY_XDISPLAY (display), cursor_type);
private = g_new (GdkCursorPrivate, 1);
private->display = display;
private->xcursor = xcursor;
cursor = (GdkCursor *) private;
cursor->type = cursor_type;
cursor->ref_count = 1;
return cursor;
}
/**
* gdk_cursor_new_from_pixmap:
* @source: the pixmap specifying the cursor.
* @mask: the pixmap specifying the mask, which must be the same size as
* @source.
* @fg: the foreground color, used for the bits in the source which are 1.
* The color does not have to be allocated first.
* @bg: the background color, used for the bits in the source which are 0.
* The color does not have to be allocated first.
* @x: the horizontal offset of the 'hotspot' of the cursor.
* @y: the vertical offset of the 'hotspot' of the cursor.
*
* Creates a new cursor from a given pixmap and mask. Both the pixmap and mask
* must have a depth of 1 (i.e. each pixel has only 2 values - on or off).
* The standard cursor size is 16 by 16 pixels. You can create a bitmap
* from inline data as in the below example.
*
* <example><title>Creating a custom cursor</title>
* <programlisting>
* /<!-- -->* This data is in X bitmap format, and can be created with the
'bitmap'
* utility. *<!-- -->/
* #define cursor1_width 16
* #define cursor1_height 16
* static unsigned char cursor1_bits[] = {
* 0x80, 0x01, 0x40, 0x02, 0x20, 0x04, 0x10, 0x08, 0x08, 0x10, 0x04, 0x20,
* 0x82, 0x41, 0x41, 0x82, 0x41, 0x82, 0x82, 0x41, 0x04, 0x20, 0x08, 0x10,
* 0x10, 0x08, 0x20, 0x04, 0x40, 0x02, 0x80, 0x01};
*
* static unsigned char cursor1mask_bits[] = {
* 0x80, 0x01, 0xc0, 0x03, 0x60, 0x06, 0x30, 0x0c, 0x18, 0x18, 0x8c, 0x31,
* 0xc6, 0x63, 0x63, 0xc6, 0x63, 0xc6, 0xc6, 0x63, 0x8c, 0x31, 0x18, 0x18,
* 0x30, 0x0c, 0x60, 0x06, 0xc0, 0x03, 0x80, 0x01};
*
*
* GdkCursor *cursor;
* GdkPixmap *source, *mask;
* GdkColor fg = { 0, 65535, 0, 0 }; /<!-- -->* Red. *<!-- -->/
* GdkColor bg = { 0, 0, 0, 65535 }; /<!-- -->* Blue. *<!-- -->/
*
*
* source = gdk_bitmap_create_from_data (NULL, cursor1_bits,
* cursor1_width, cursor1_height);
* mask = gdk_bitmap_create_from_data (NULL, cursor1mask_bits,
* cursor1_width, cursor1_height);
* cursor = gdk_cursor_new_from_pixmap (source, mask, &fg, &bg, 8, 8);
* gdk_pixmap_unref (source);
* gdk_pixmap_unref (mask);
*
*
* gdk_window_set_cursor (widget->window, cursor);
* </programlisting>
* </example>
*
* Return value: a new #GdkCursor.
**/
GdkCursor*
gdk_cursor_new_from_pixmap (GdkPixmap *source,
GdkPixmap *mask,
const GdkColor *fg,
const GdkColor *bg,
gint x,
gint y)
{
GdkCursorPrivate *private;
GdkCursor *cursor;
Pixmap source_pixmap, mask_pixmap;
Cursor xcursor;
XColor xfg, xbg;
GdkDisplay *display;
g_return_val_if_fail (GDK_IS_PIXMAP (source), NULL);
g_return_val_if_fail (GDK_IS_PIXMAP (mask), NULL);
g_return_val_if_fail (fg != NULL, NULL);
g_return_val_if_fail (bg != NULL, NULL);
source_pixmap = GDK_PIXMAP_XID (source);
mask_pixmap = GDK_PIXMAP_XID (mask);
display = GDK_PIXMAP_DISPLAY (source);
xfg.pixel = fg->pixel;
xfg.red = fg->red;
xfg.blue = fg->blue;
xfg.green = fg->green;
xbg.pixel = bg->pixel;
xbg.red = bg->red;
xbg.blue = bg->blue;
xbg.green = bg->green;
if (display->closed)
xcursor = None;
else
xcursor = XCreatePixmapCursor (GDK_DISPLAY_XDISPLAY (display),
source_pixmap, mask_pixmap, &xfg, &xbg, x,
y);
private = g_new (GdkCursorPrivate, 1);
private->display = display;
private->xcursor = xcursor;
cursor = (GdkCursor *) private;
cursor->type = GDK_CURSOR_IS_PIXMAP;
cursor->ref_count = 1;
return cursor;
}
void
_gdk_cursor_destroy (GdkCursor *cursor)
{
GdkCursorPrivate *private;
g_return_if_fail (cursor != NULL);
g_return_if_fail (cursor->ref_count == 0);
private = (GdkCursorPrivate *) cursor;
if (!private->display->closed && private->xcursor)
XFreeCursor (GDK_DISPLAY_XDISPLAY (private->display), private->xcursor);
g_free (private);
}
/**
* gdk_x11_cursor_get_xdisplay:
* @cursor: a #GdkCursor.
*
* Returns the display of a #GdkCursor.
*
* Return value: an Xlib <type>Display*</type>.
**/
Display *
gdk_x11_cursor_get_xdisplay (GdkCursor *cursor)
{
g_return_val_if_fail (cursor != NULL, NULL);
return GDK_DISPLAY_XDISPLAY(((GdkCursorPrivate *)cursor)->display);
}
/**
* gdk_x11_cursor_get_xcursor:
* @cursor: a #GdkCursor.
*
* Returns the X cursor belonging to a #GdkCursor.
*
* Return value: an Xlib <type>Cursor</type>.
**/
Cursor
gdk_x11_cursor_get_xcursor (GdkCursor *cursor)
{
g_return_val_if_fail (cursor != NULL, None);
return ((GdkCursorPrivate *)cursor)->xcursor;
}
/**
* gdk_cursor_get_display:
* @cursor: a #GdkCursor.
*
* Returns the display on which the #GdkCursor is defined.
*
* Returns: the #GdkDisplay associated to @cursor
*
* Since: 2.2
*/
GdkDisplay *
gdk_cursor_get_display (GdkCursor *cursor)
{
g_return_val_if_fail (cursor != NULL, NULL);
return ((GdkCursorPrivate *)cursor)->display;
}
#ifdef HAVE_XCURSOR
static XcursorImage*
create_cursor_image (GdkPixbuf *pixbuf,
gint x,
gint y)
{
guint width, height, rowstride, n_channels;
guchar *pixels, *src;
XcursorImage *xcimage;
XcursorPixel *dest;
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
n_channels = gdk_pixbuf_get_n_channels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
xcimage = XcursorImageCreate (width, height);
xcimage->xhot = x;
xcimage->yhot = y;
dest = xcimage->pixels;
if (n_channels == 3)
{
gint i, j;
for (j = 0; j < height; j++)
{
src = pixels + j * rowstride;
for (i = 0; i < width; i++)
{
*dest = (0xff << 24) | (src[0] << 16) | (src[1] << 8) | src[2];
}
src += n_channels;
dest++;
}
}
else
{
_gdk_x11_convert_to_format (pixels, rowstride,
(guchar *) dest, 4 * width,
GDK_X11_FORMAT_ARGB,
(G_BYTE_ORDER == G_BIG_ENDIAN) ?
GDK_MSB_FIRST : GDK_LSB_FIRST,
width, height);
}
return xcimage;
}
/**
* gdk_cursor_new_from_pixbuf:
* @display: the #GdkDisplay for which the cursor will be created
* @pixbuf: the #GdkPixbuf containing the cursor image
* @x: the horizontal offset of the 'hotspot' of the cursor.
* @y: the vertical offset of the 'hotspot' of the cursor.
*
* Creates a new cursor from a pixbuf.
*
* Not all GDK backends support RGBA cursors. If they are not
* supported, a monochrome approximation will be displayed.
* The functions gdk_display_supports_cursor_alpha() and
* gdk_display_supports_cursor_color() can be used to determine
* whether RGBA cursors are supported;
* gdk_display_get_default_cursor_size() and
* gdk_display_get_maximal_cursor_size() give information about
* cursor sizes.
*
* On the X backend, support for RGBA cursors requires a
* sufficently new version of the X Render extension.
*
* Returns: a new #GdkCursor.
*
* Since: 2.4
*/
GdkCursor *
gdk_cursor_new_from_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
{
XcursorImage *xcimage;
Cursor xcursor;
GdkCursorPrivate *private;
GdkCursor *cursor;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
g_return_val_if_fail (0 <= x && x < gdk_pixbuf_get_width (pixbuf), NULL);
g_return_val_if_fail (0 <= y && y < gdk_pixbuf_get_height (pixbuf), NULL);
if (display->closed)
xcursor = None;
else
{
xcimage = create_cursor_image (pixbuf, x, y);
xcursor = XcursorImageLoadCursor (GDK_DISPLAY_XDISPLAY (display),
xcimage);
XcursorImageDestroy (xcimage);
}
private = g_new (GdkCursorPrivate, 1);
private->display = display;
private->xcursor = xcursor;
cursor = (GdkCursor *) private;
cursor->type = GDK_CURSOR_IS_PIXMAP;
cursor->ref_count = 1;
return cursor;
}
/**
* gdk_display_supports_cursor_alpha:
* @display: a #GdkDisplay
*
* Returns %TRUE if cursors can use an 8bit alpha channel
* on @display. Otherwise, cursors are restricted to bilevel
* alpha (i.e. a mask).
*
* Returns: whether cursors can have alpha channels.
*
* Since: 2.4
*/
gboolean
gdk_display_supports_cursor_alpha (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display));
}
/**
* gdk_display_supports_cursor_color:
* @display: a #GdkDisplay
*
* Returns %TRUE if multicolored cursors are supported
* on @display. Otherwise, cursors have only a forground
* and a background color.
*
* Returns: whether cursors can have multiple colors.
*
* Since: 2.4
*/
gboolean
gdk_display_supports_cursor_color (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display));
}
/**
* gdk_display_get_default_cursor_size:
* @display: a #GdkDisplay
*
* Returns the default size to use for cursors on @display.
*
* Returns: the default cursor size.
*
* Since: 2.4
*/
guint
gdk_display_get_default_cursor_size (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
return XcursorGetDefaultSize (GDK_DISPLAY_XDISPLAY (display));
}
#else
GdkCursor *
gdk_cursor_new_from_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
{
GdkCursor *cursor;
GdkPixmap *pixmap, *mask;
guint width, height, n_channels, rowstride, i, j;
guint8 *data, *mask_data, *pixels;
GdkColor fg = { 0, 0, 0, 0 };
GdkColor bg = { 0, 0xffff, 0xffff, 0xffff };
GdkScreen *screen;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
g_return_val_if_fail (0 <= x && x < width, NULL);
g_return_val_if_fail (0 <= y && y < height, NULL);
n_channels = gdk_pixbuf_get_n_channels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
data = g_new0 (guint8, (width + 7) / 8 * height);
mask_data = g_new0 (guint8, (width + 7) / 8 * height);
for (j = 0; j < height; j++)
{
guint8 *src = pixels + j * rowstride;
guint8 *d = data + (width + 7) / 8 * j;
guint8 *md = mask_data + (width + 7) / 8 * j;
for (i = 0; i < width; i++)
{
if (src[1] < 0x80)
*d |= 1 << (i % 8);
if (n_channels == 3 || src[3] >= 0x80)
*md |= 1 << (i % 8);
src += n_channels;
if (i % 8 == 7)
{
d++;
md++;
}
}
}
screen = gdk_display_get_default_screen (display);
pixmap = gdk_bitmap_create_from_data (gdk_screen_get_root_window (screen),
data, width, height);
mask = gdk_bitmap_create_from_data (gdk_screen_get_root_window (screen),
mask_data, width, height);
cursor = gdk_cursor_new_from_pixmap (pixmap, mask, &fg, &bg, x, y);
g_object_unref (pixmap);
g_object_unref (mask);
g_free (data);
g_free (mask_data);
return cursor;
}
gboolean
gdk_display_supports_cursor_alpha (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
return FALSE;
}
gboolean
gdk_display_supports_cursor_color (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
return FALSE;
}
guint
gdk_display_get_default_cursor_size (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), 0);
/* no idea, really */
return 20;
}
#endif
/**
* gdk_display_get_maximal_cursor_size:
* @display: a #GdkDisplay
* @width: the return location for the maximal cursor width
* @height: the return location for the maximal cursor height
*
* Gets the maximal size to use for cursors on @display.
*
* Since: 2.4
*/
void
gdk_display_get_maximal_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
GdkScreen *screen;
GdkWindow *window;
g_return_if_fail (GDK_IS_DISPLAY (display));
screen = gdk_display_get_default_screen (display);
window = gdk_screen_get_root_window (screen);
XQueryBestCursor (GDK_DISPLAY_XDISPLAY (display),
GDK_WINDOW_XWINDOW (window),
128, 128, width, height);
}
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