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gtk/gdk/win32/gdkcursor-win32.c

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/* 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.
*/
#include "config.h"
#include "gdkwin32.h"
#include "gdkcursor.h"
#include "gdkinternals.h"
#include "gdkpixmap-win32.h"
#include "gdkprivate-win32.h"
static const struct { const char *name; int type; } cursors[] = {
{ "x_cursor", 0 },
{ "arrow", 2 },
{ "based_arrow_down", 4 },
{ "based_arrow_up", 6 },
{ "boat", 8 },
{ "bogosity", 10 },
{ "bottom_left_corner", 12 },
{ "bottom_right_corner", 14 },
{ "bottom_side", 16 },
{ "bottom_tee", 18 },
{ "box_spiral", 20 },
{ "center_ptr", 22 },
{ "circle", 24 },
{ "clock", 26 },
{ "coffee_mug", 28 },
{ "cross", 30 },
{ "cross_reverse", 32 },
{ "crosshair", 34 },
{ "diamond_cross", 36 },
{ "dot", 38 },
{ "dotbox", 40 },
{ "double_arrow", 42 },
{ "draft_large", 44 },
{ "draft_small", 46 },
{ "draped_box", 48 },
{ "exchange", 50 },
{ "fleur", 52 },
{ "gobbler", 54 },
{ "gumby", 56 },
{ "hand1", 58 },
{ "hand2", 60 },
{ "heart", 62 },
{ "icon", 64 },
{ "iron_cross", 66 },
{ "left_ptr", 68 },
{ "left_side", 70 },
{ "left_tee", 72 },
{ "leftbutton", 74 },
{ "ll_angle", 76 },
{ "lr_angle", 78 },
{ "man", 80 },
{ "middlebutton", 82 },
{ "mouse", 84 },
{ "pencil", 86 },
{ "pirate", 88 },
{ "plus", 90 },
{ "question_arrow", 92 },
{ "right_ptr", 94 },
{ "right_side", 96 },
{ "right_tee", 98 },
{ "rightbutton", 100 },
{ "rtl_logo", 102 },
{ "sailboat", 104 },
{ "sb_down_arrow", 106 },
{ "sb_h_double_arrow", 108 },
{ "sb_left_arrow", 110 },
{ "sb_right_arrow", 112 },
{ "sb_up_arrow", 114 },
{ "sb_v_double_arrow", 116 },
{ "shuttle", 118 },
{ "sizing", 120 },
{ "spider", 122 },
{ "spraycan", 124 },
{ "star", 126 },
{ "target", 128 },
{ "tcross", 130 },
{ "top_left_arrow", 132 },
{ "top_left_corner", 134 },
{ "top_right_corner", 136 },
{ "top_side", 138 },
{ "top_tee", 140 },
{ "trek", 142 },
{ "ul_angle", 144 },
{ "umbrella", 146 },
{ "ur_angle", 148 },
{ "watch", 150 },
{ "xterm", 152 },
{ NULL, 0 }
};
GdkCursor*
gdk_cursor_new (GdkCursorType cursor_type)
{
GdkCursorPrivate *private;
GdkCursor *cursor;
HCURSOR hcursor;
int i;
for (i = 0; cursors[i].name != NULL && cursors[i].type != cursor_type; i++)
;
if (cursors[i].name != NULL)
{
hcursor = LoadCursor (gdk_dll_hinstance, cursors[i].name);
if (hcursor == NULL)
WIN32_API_FAILED ("LoadCursor");
GDK_NOTE (MISC, g_print ("gdk_cursor_new: %#x %d\n",
(guint) hcursor, cursor_type));
}
else
{
g_warning ("gdk_cursor_new: no cursor %d found",
cursor_type);
hcursor = NULL;
}
private = g_new (GdkCursorPrivate, 1);
private->hcursor = hcursor;
cursor = (GdkCursor*) private;
cursor->type = cursor_type;
cursor->ref_count = 1;
return cursor;
}
static gboolean
color_is_white (GdkColor *color)
{
return (color->red == 0xFFFF
&& color->green == 0xFFFF
&& color->blue == 0xFFFF);
}
GdkCursor*
gdk_cursor_new_from_pixmap (GdkPixmap *source,
GdkPixmap *mask,
GdkColor *fg,
GdkColor *bg,
gint x,
gint y)
{
GdkCursorPrivate *private;
GdkCursor *cursor;
GdkPixmapImplWin32 *source_impl, *mask_impl;
GdkImage *source_image, *mask_image;
HCURSOR hcursor;
guchar *p, *q, *xor_mask, *and_mask;
gint width, height, cursor_width, cursor_height;
guchar residue;
gint ix, iy;
const gboolean bg_is_white = color_is_white (bg);
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_impl = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (source)->impl);
mask_impl = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (mask)->impl);
g_return_val_if_fail (source_impl->width == mask_impl->width
&& source_impl->height == mask_impl->height,
NULL);
width = source_impl->width;
height = source_impl->height;
cursor_width = GetSystemMetrics (SM_CXCURSOR);
cursor_height = GetSystemMetrics (SM_CYCURSOR);
g_return_val_if_fail (width <= cursor_width && height <= cursor_height,
NULL);
residue = (1 << ((8-(width%8))%8)) - 1;
source_image = gdk_image_get (source, 0, 0, width, height);
mask_image = gdk_image_get (mask, 0, 0, width, height);
if (source_image->depth != 1 || mask_image->depth != 1)
{
gdk_image_unref (source_image);
gdk_image_unref (mask_image);
g_return_val_if_fail (source_image->depth == 1 && mask_image->depth == 1,
NULL);
}
/* Such complex bit manipulation for this simple task, sigh.
* The X cursor and Windows cursor concepts are quite different.
* We assume here that we are always called with fg == black and
* bg == white, *or* the other way around. Random colours won't work.
* (Well, you will get a cursor, but not in those colours.)
*/
/* Note: The comments below refer to the case fg==black and
* bg==white, as that was what was implemented first. The fg==white
* (the "if (fg->pixel)" branches) case was added later.
*/
/* First set masked-out source bits, as all source bits matter on Windoze.
* As we invert them below, they will be clear in the final xor_mask.
*/
for (iy = 0; iy < height; iy++)
{
p = (guchar *) source_image->mem + iy*source_image->bpl;
q = (guchar *) mask_image->mem + iy*mask_image->bpl;
for (ix = 0; ix < ((width-1)/8+1); ix++)
if (bg_is_white)
*p++ |= ~(*q++);
else
*p++ &= *q++;
}
/* XOR mask is initialized to zero */
xor_mask = g_malloc0 (cursor_width/8 * cursor_height);
for (iy = 0; iy < height; iy++)
{
p = (guchar *) source_image->mem + iy*source_image->bpl;
q = xor_mask + iy*cursor_width/8;
for (ix = 0; ix < ((width-1)/8+1); ix++)
if (bg_is_white)
*q++ = ~(*p++);
else
*q++ = *p++;
q[-1] &= ~residue; /* Clear left-over bits */
}
/* AND mask is initialized to ones */
and_mask = g_malloc (cursor_width/8 * cursor_height);
memset (and_mask, 0xFF, cursor_width/8 * cursor_height);
for (iy = 0; iy < height; iy++)
{
p = (guchar *) mask_image->mem + iy*mask_image->bpl;
q = and_mask + iy*cursor_width/8;
for (ix = 0; ix < ((width-1)/8+1); ix++)
*q++ = ~(*p++);
q[-1] |= residue; /* Set left-over bits */
}
hcursor = CreateCursor (gdk_app_hmodule, x, y, cursor_width, cursor_height,
and_mask, xor_mask);
GDK_NOTE (MISC, g_print ("gdk_cursor_new_from_pixmap: "
"%#x (%dx%d) %#x (%dx%d) = %#x (%dx%d)\n",
(guint) GDK_PIXMAP_HBITMAP (source),
source_impl->width, source_impl->height,
(guint) GDK_PIXMAP_HBITMAP (mask),
mask_impl->width, mask_impl->height,
(guint) hcursor, cursor_width, cursor_height));
g_free (xor_mask);
g_free (and_mask);
gdk_image_unref (source_image);
gdk_image_unref (mask_image);
private = g_new (GdkCursorPrivate, 1);
private->hcursor = hcursor;
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);
private = (GdkCursorPrivate *) cursor;
GDK_NOTE (MISC, g_print ("_gdk_cursor_destroy: %#x\n",
(cursor->type == GDK_CURSOR_IS_PIXMAP) ? (guint) private->hcursor : 0));
if (cursor->type == GDK_CURSOR_IS_PIXMAP)
if (!DestroyCursor (private->hcursor))
WIN32_API_FAILED ("DestroyCursor");
g_free (private);
}
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