forked from AuroraMiddleware/gtk
469f6e87a5
2003-07-11 Morten Welinder <terra@gnome.org> * gdk/x11/gdkcursor-x11.c (gdk_cursor_new_from_pixbuf): Fix memory access error. (#69436)
599 lines
17 KiB
C
599 lines
17 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <X11/Xlib.h>
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#include <X11/cursorfont.h>
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#ifdef HAVE_XCURSOR
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#include <X11/Xcursor/Xcursor.h>
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#endif
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#include "gdkprivate-x11.h"
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#include "gdkcursor.h"
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#include "gdkpixmap-x11.h"
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#include "gdkx.h"
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#include <gdk/gdkpixmap.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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/**
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* gdk_cursor_new_for_display:
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* @display: the #GdkDisplay for which the cursor will be created
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* @cursor_type: cursor to create
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*
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* Creates a new cursor from the set of builtin cursors.
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* Some useful ones are:
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* <itemizedlist>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="right_ptr.png"></inlinegraphic> #GDK_RIGHT_PTR (right-facing arrow)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="crosshair.png"></inlinegraphic> #GDK_CROSSHAIR (crosshair)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="xterm.png"></inlinegraphic> #GDK_XTERM (I-beam)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="watch.png"></inlinegraphic> #GDK_WATCH (busy)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="fleur.png"></inlinegraphic> #GDK_FLEUR (for moving objects)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="hand1.png"></inlinegraphic> #GDK_HAND1 (a right-pointing hand)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="hand2.png"></inlinegraphic> #GDK_HAND2 (a left-pointing hand)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="left_side.png"></inlinegraphic> #GDK_LEFT_SIDE (resize left side)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="right_side.png"></inlinegraphic> #GDK_RIGHT_SIDE (resize right side)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="top_left_corner.png"></inlinegraphic> #GDK_TOP_LEFT_CORNER (resize northwest corner)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="top_right_corner.png"></inlinegraphic> #GDK_TOP_RIGHT_CORNER (resize northeast corner)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="bottom_left_corner.png"></inlinegraphic> #GDK_BOTTOM_LEFT_CORNER (resize southwest corner)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="bottom_right_corner.png"></inlinegraphic> #GDK_BOTTOM_RIGHT_CORNER (resize southeast corner)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="top_side.png"></inlinegraphic> #GDK_TOP_SIDE (resize top side)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="bottom_side.png"></inlinegraphic> #GDK_BOTTOM_SIDE (resize bottom side)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="sb_h_double_arrow.png"></inlinegraphic> #GDK_SB_H_DOUBLE_ARROW (move vertical splitter)
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* </para></listitem>
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* <listitem><para>
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* <inlinegraphic format="PNG" fileref="sb_v_double_arrow.png"></inlinegraphic> #GDK_SB_V_DOUBLE_ARROW (move horizontal splitter)
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* </para></listitem>
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* </itemizedlist>
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*
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* To make the cursor invisible, use gdk_cursor_new_from_pixmap() to create
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* a cursor with no pixels in it.
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*
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* Return value: a new #GdkCursor
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*
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* Since: 2.2
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**/
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GdkCursor*
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gdk_cursor_new_for_display (GdkDisplay *display,
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GdkCursorType cursor_type)
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{
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GdkCursorPrivate *private;
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GdkCursor *cursor;
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Cursor xcursor;
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g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
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if (display->closed)
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xcursor = None;
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else
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xcursor = XCreateFontCursor (GDK_DISPLAY_XDISPLAY (display), cursor_type);
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private = g_new (GdkCursorPrivate, 1);
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private->display = display;
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private->xcursor = xcursor;
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cursor = (GdkCursor *) private;
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cursor->type = cursor_type;
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cursor->ref_count = 1;
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return cursor;
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}
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/**
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* gdk_cursor_new_from_pixmap:
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* @source: the pixmap specifying the cursor.
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* @mask: the pixmap specifying the mask, which must be the same size as
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* @source.
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* @fg: the foreground color, used for the bits in the source which are 1.
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* The color does not have to be allocated first.
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* @bg: the background color, used for the bits in the source which are 0.
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* The color does not have to be allocated first.
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* @x: the horizontal offset of the 'hotspot' of the cursor.
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* @y: the vertical offset of the 'hotspot' of the cursor.
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*
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* Creates a new cursor from a given pixmap and mask. Both the pixmap and mask
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* must have a depth of 1 (i.e. each pixel has only 2 values - on or off).
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* The standard cursor size is 16 by 16 pixels. You can create a bitmap
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* from inline data as in the below example.
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*
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* <example><title>Creating a custom cursor</title>
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* <programlisting>
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* /<!-- -->* This data is in X bitmap format, and can be created with the 'bitmap'
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* utility. *<!-- -->/
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* #define cursor1_width 16
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* #define cursor1_height 16
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* static unsigned char cursor1_bits[] = {
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* 0x80, 0x01, 0x40, 0x02, 0x20, 0x04, 0x10, 0x08, 0x08, 0x10, 0x04, 0x20,
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* 0x82, 0x41, 0x41, 0x82, 0x41, 0x82, 0x82, 0x41, 0x04, 0x20, 0x08, 0x10,
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* 0x10, 0x08, 0x20, 0x04, 0x40, 0x02, 0x80, 0x01};
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*
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* static unsigned char cursor1mask_bits[] = {
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* 0x80, 0x01, 0xc0, 0x03, 0x60, 0x06, 0x30, 0x0c, 0x18, 0x18, 0x8c, 0x31,
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* 0xc6, 0x63, 0x63, 0xc6, 0x63, 0xc6, 0xc6, 0x63, 0x8c, 0x31, 0x18, 0x18,
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* 0x30, 0x0c, 0x60, 0x06, 0xc0, 0x03, 0x80, 0x01};
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*
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*
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* GdkCursor *cursor;
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* GdkPixmap *source, *mask;
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* GdkColor fg = { 0, 65535, 0, 0 }; /<!-- -->* Red. *<!-- -->/
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* GdkColor bg = { 0, 0, 0, 65535 }; /<!-- -->* Blue. *<!-- -->/
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*
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*
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* source = gdk_bitmap_create_from_data (NULL, cursor1_bits,
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* cursor1_width, cursor1_height);
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* mask = gdk_bitmap_create_from_data (NULL, cursor1mask_bits,
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* cursor1_width, cursor1_height);
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* cursor = gdk_cursor_new_from_pixmap (source, mask, &fg, &bg, 8, 8);
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* gdk_pixmap_unref (source);
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* gdk_pixmap_unref (mask);
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*
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*
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* gdk_window_set_cursor (widget->window, cursor);
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* </programlisting>
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* </example>
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*
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* Return value: a new #GdkCursor.
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**/
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GdkCursor*
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gdk_cursor_new_from_pixmap (GdkPixmap *source,
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GdkPixmap *mask,
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GdkColor *fg,
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GdkColor *bg,
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gint x,
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gint y)
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{
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GdkCursorPrivate *private;
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GdkCursor *cursor;
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Pixmap source_pixmap, mask_pixmap;
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Cursor xcursor;
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XColor xfg, xbg;
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GdkDisplay *display;
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g_return_val_if_fail (GDK_IS_PIXMAP (source), NULL);
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g_return_val_if_fail (GDK_IS_PIXMAP (mask), NULL);
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g_return_val_if_fail (fg != NULL, NULL);
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g_return_val_if_fail (bg != NULL, NULL);
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source_pixmap = GDK_PIXMAP_XID (source);
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mask_pixmap = GDK_PIXMAP_XID (mask);
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display = GDK_PIXMAP_DISPLAY (source);
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xfg.pixel = fg->pixel;
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xfg.red = fg->red;
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xfg.blue = fg->blue;
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xfg.green = fg->green;
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xbg.pixel = bg->pixel;
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xbg.red = bg->red;
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xbg.blue = bg->blue;
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xbg.green = bg->green;
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if (display->closed)
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xcursor = None;
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else
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xcursor = XCreatePixmapCursor (GDK_DISPLAY_XDISPLAY (display),
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source_pixmap, mask_pixmap, &xfg, &xbg, x, y);
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private = g_new (GdkCursorPrivate, 1);
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private->display = display;
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private->xcursor = xcursor;
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cursor = (GdkCursor *) private;
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cursor->type = GDK_CURSOR_IS_PIXMAP;
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cursor->ref_count = 1;
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return cursor;
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}
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void
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_gdk_cursor_destroy (GdkCursor *cursor)
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{
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GdkCursorPrivate *private;
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g_return_if_fail (cursor != NULL);
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g_return_if_fail (cursor->ref_count == 0);
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private = (GdkCursorPrivate *) cursor;
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if (!private->display->closed && private->xcursor)
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XFreeCursor (GDK_DISPLAY_XDISPLAY (private->display), private->xcursor);
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g_free (private);
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}
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/**
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* gdk_x11_cursor_get_xdisplay:
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* @cursor: a #GdkCursor.
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*
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* Returns the display of a #GdkCursor.
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*
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* Return value: an Xlib <type>Display*</type>.
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**/
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Display *
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gdk_x11_cursor_get_xdisplay (GdkCursor *cursor)
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{
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g_return_val_if_fail (cursor != NULL, NULL);
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return GDK_DISPLAY_XDISPLAY(((GdkCursorPrivate *)cursor)->display);
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}
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/**
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* gdk_x11_cursor_get_xcursor:
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* @cursor: a #GdkCursor.
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*
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* Returns the X cursor belonging to a #GdkCursor.
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*
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* Return value: an Xlib <type>Cursor</type>.
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**/
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Cursor
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gdk_x11_cursor_get_xcursor (GdkCursor *cursor)
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{
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g_return_val_if_fail (cursor != NULL, None);
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return ((GdkCursorPrivate *)cursor)->xcursor;
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}
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/**
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* gdk_cursor_get_display:
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* @cursor: a #GdkCursor.
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*
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* Returns the display on which the #GdkCursor is defined.
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*
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* Returns: the #GdkDisplay associated to @cursor
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*
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* Since: 2.2
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*/
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GdkDisplay *
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gdk_cursor_get_display (GdkCursor *cursor)
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{
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g_return_val_if_fail (cursor != NULL, NULL);
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return ((GdkCursorPrivate *)cursor)->display;
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}
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#ifdef HAVE_XCURSOR
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static XcursorImage*
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create_cursor_image (GdkPixbuf *pixbuf,
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gint x,
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gint y)
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{
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guint width, height, rowstride, n_channels;
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guchar *pixels, *src;
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XcursorImage *xcimage;
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XcursorPixel *dest;
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guchar a;
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gint i, j;
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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n_channels = gdk_pixbuf_get_n_channels (pixbuf);
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rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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pixels = gdk_pixbuf_get_pixels (pixbuf);
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xcimage = XcursorImageCreate (width, height);
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xcimage->xhot = x;
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xcimage->yhot = y;
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dest = xcimage->pixels;
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for (j = 0; j < height; j++)
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{
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src = pixels + j * rowstride;
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for (i = 0; i < width; i++)
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{
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if (n_channels == 3)
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a = 0xff;
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else
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a = src[3];
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*dest = (a << 24) | (src[0] << 16) | (src[1] << 8) | src[2];
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src += n_channels;
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dest++;
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}
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}
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return xcimage;
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}
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/**
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* gdk_cursor_new_from_pixbuf:
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* @display: the #GdkDisplay for which the cursor will be created
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* @pixbuf: the #GdkPixbuf containing the cursor image
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* @x: the horizontal offset of the 'hotspot' of the cursor.
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* @y: the vertical offset of the 'hotspot' of the cursor.
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*
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* Creates a new cursor from a pixbuf.
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*
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* Not all GDK backends support RGBA cursors. If they are not
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* supported, a monochrome approximation will be displayed.
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* The functions gdk_display_supports_cursor_alpha() and
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* gdk_display_supports_cursor_color() can be used to determine
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* whether RGBA cursors are supported;
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* gdk_display_get_default_cursor_size() and
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* gdk_display_get_maximal_cursor_size() give information about
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* cursor sizes.
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*
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* On the X backend, support for RGBA cursors requires a
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* sufficently new version of the X Render extension.
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*
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* Returns: a new #GdkCursor.
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*
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* Since: 2.4
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*/
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GdkCursor *
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gdk_cursor_new_from_pixbuf (GdkDisplay *display,
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GdkPixbuf *pixbuf,
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gint x,
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gint y)
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{
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XcursorImage *xcimage;
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Cursor xcursor;
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GdkCursorPrivate *private;
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GdkCursor *cursor;
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g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
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g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
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g_return_val_if_fail (0 <= x && x < gdk_pixbuf_get_width (pixbuf), NULL);
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g_return_val_if_fail (0 <= y && y < gdk_pixbuf_get_height (pixbuf), NULL);
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if (display->closed)
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xcursor = None;
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else
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{
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xcimage = create_cursor_image (pixbuf, x, y);
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xcursor = XcursorImageLoadCursor (GDK_DISPLAY_XDISPLAY (display), xcimage);
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XcursorImageDestroy (xcimage);
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}
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private = g_new (GdkCursorPrivate, 1);
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private->display = display;
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private->xcursor = xcursor;
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cursor = (GdkCursor *) private;
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cursor->type = GDK_CURSOR_IS_PIXMAP;
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cursor->ref_count = 1;
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return cursor;
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}
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/**
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* gdk_display_supports_cursor_alpha:
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* @display: a #GdkDisplay
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*
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* Returns %TRUE if cursors can use an 8bit alpha channel
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* on @display. Otherwise, cursors are restricted to bilevel
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* alpha (i.e. a mask).
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*
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* Returns: whether cursors can have alpha channels.
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*
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* Since: 2.4
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*/
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gboolean
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gdk_display_supports_cursor_alpha (GdkDisplay *display)
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{
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g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
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return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display));
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}
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/**
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* gdk_display_supports_cursor_color:
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* @display: a #GdkDisplay
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*
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* Returns %TRUE if multicolored cursors are supported
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* on @display. Otherwise, cursors have only a forground
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* and a background color.
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*
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* Returns: whether cursors can have multiple colors.
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*
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* Since: 2.4
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*/
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gboolean
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gdk_display_supports_cursor_color (GdkDisplay *display)
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{
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g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
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return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display));
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}
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/**
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* gdk_display_get_default_cursor_size:
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* @display: a #GdkDisplay
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*
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* Returns the default size to use for cursors on @display.
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*
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* Returns: the default cursor size.
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*
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* Since: 2.4
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*/
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guint
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gdk_display_get_default_cursor_size (GdkDisplay *display)
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{
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g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
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return XcursorGetDefaultSize (GDK_DISPLAY_XDISPLAY (display));
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|
}
|
|
|
|
#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_default_cursor_size (GdkDisplay *display)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
|
|
|
|
/* 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
|
|
*
|
|
* Returns 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);
|
|
}
|
|
|