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gtk2/gdk/win32/gdkcursor-win32.c
Chun-wei Fan c06b1cc103 Win32: Re-work cursor handling 
Like the X11 and Wayland backends, re-work how the cursors are being
handled.  So, we use a hash table to cache up the HCURSORS that we
create along the way.

We still need to cache up the icon/cursor themes since this is something
that is not part of Windows but was added on to support icon/cursor themes
such as Adwaita on Windows, but should be in-line with what is going on in
GdkCursor.

Also, remove the _gdk_grab_cursor global variable in gdkprivate-win32.h,
and replace it with another variable in the GdkWin32Display structure,
to make things cleaner in the process.

https://bugzilla.gnome.org/show_bug.cgi?id=773299
2017-11-09 08:30:09 +08:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1998-2002 Tor Lillqvist
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#define GDK_PIXBUF_ENABLE_BACKEND /* Ugly? */
#include "gdkdisplay.h"
#include "gdkscreen.h"
#include "gdkcursor.h"
#include "gdkwin32.h"
#include "gdktextureprivate.h"
#include "gdkdisplay-win32.h"
#ifdef __MINGW32__
#include <w32api.h>
#endif
#include "xcursors.h"
typedef struct _DefaultCursor {
char *name;
char *id;
} DefaultCursor;
static DefaultCursor default_cursors[] = {
{ "appstarting", IDC_APPSTARTING },
{ "arrow", IDC_ARROW },
{ "cross", IDC_CROSS },
{ "hand", IDC_HAND },
{ "help", IDC_HELP },
{ "ibeam", IDC_IBEAM },
/* an X cursor name, for compatibility with GTK: */
{ "left_ptr_watch", IDC_APPSTARTING },
{ "sizeall", IDC_SIZEALL },
{ "sizenesw", IDC_SIZENESW },
{ "sizens", IDC_SIZENS },
{ "sizenwse", IDC_SIZENWSE },
{ "sizewe", IDC_SIZEWE },
{ "uparrow", IDC_UPARROW },
{ "wait", IDC_WAIT },
/* css cursor names: */
{ "default", IDC_ARROW },
{ "pointer", IDC_HAND },
{ "progress", IDC_APPSTARTING },
{ "crosshair", IDC_CROSS },
{ "text", IDC_IBEAM },
{ "move", IDC_SIZEALL },
{ "not-allowed", IDC_NO },
{ "ew-resize", IDC_SIZEWE },
{ "e-resize", IDC_SIZEWE },
{ "w-resize", IDC_SIZEWE },
{ "col-resize", IDC_SIZEWE },
{ "ns-resize", IDC_SIZENS },
{ "n-resize", IDC_SIZENS },
{ "s-resize", IDC_SIZENS },
{ "row-resize", IDC_SIZENS },
{ "nesw-resize", IDC_SIZENESW },
{ "ne-resize", IDC_SIZENESW },
{ "sw-resize", IDC_SIZENESW },
{ "nwse-resize", IDC_SIZENWSE },
{ "nw-resize", IDC_SIZENWSE },
{ "se-resize", IDC_SIZENWSE }
};
static HCURSOR
hcursor_from_x_cursor (gint i,
const gchar *name)
{
gint j, x, y, ofs;
HCURSOR rv;
gint w, h;
guchar *and_plane, *xor_plane;
w = GetSystemMetrics (SM_CXCURSOR);
h = GetSystemMetrics (SM_CYCURSOR);
and_plane = g_malloc ((w/8) * h);
memset (and_plane, 0xff, (w/8) * h);
xor_plane = g_malloc ((w/8) * h);
memset (xor_plane, 0, (w/8) * h);
if (strcmp (name, "none") != 0)
{
#define SET_BIT(v,b) (v |= (1 << b))
#define RESET_BIT(v,b) (v &= ~(1 << b))
for (j = 0, y = 0; y < cursors[i].height && y < h ; y++)
{
ofs = (y * w) / 8;
j = y * cursors[i].width;
for (x = 0; x < cursors[i].width && x < w ; x++, j++)
{
gint pofs = ofs + x / 8;
guchar data = (cursors[i].data[j/4] & (0xc0 >> (2 * (j%4)))) >> (2 * (3 - (j%4)));
gint bit = 7 - (j % cursors[i].width) % 8;
if (data)
{
RESET_BIT (and_plane[pofs], bit);
if (data == 1)
SET_BIT (xor_plane[pofs], bit);
}
}
}
#undef SET_BIT
#undef RESET_BIT
rv = CreateCursor (_gdk_app_hmodule, cursors[i].hotx, cursors[i].hoty,
w, h, and_plane, xor_plane);
}
else
{
rv = CreateCursor (_gdk_app_hmodule, 0, 0,
w, h, and_plane, xor_plane);
}
if (rv == NULL)
WIN32_API_FAILED ("CreateCursor");
g_free (and_plane);
g_free (xor_plane);
return rv;
}
static HCURSOR
win32_cursor_create_hcursor (Win32Cursor *cursor,
const gchar *name)
{
HCURSOR result;
switch (cursor->load_type)
{
case GDK_WIN32_CURSOR_LOAD_FROM_FILE:
result = LoadImageW (NULL,
cursor->resource_name,
IMAGE_CURSOR,
cursor->width,
cursor->height,
cursor->load_flags);
break;
case GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_NULL:
result = LoadImageA (NULL,
(const gchar *) cursor->resource_name,
IMAGE_CURSOR,
cursor->width,
cursor->height,
cursor->load_flags);
break;
case GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_THIS:
result = LoadImageA (_gdk_app_hmodule,
(const gchar *) cursor->resource_name,
IMAGE_CURSOR,
cursor->width,
cursor->height,
cursor->load_flags);
break;
case GDK_WIN32_CURSOR_CREATE:
result = hcursor_from_x_cursor (cursor->xcursor_number,
name);
break;
default:
result = NULL;
}
return result;
}
static Win32Cursor *
win32_cursor_new (GdkWin32CursorLoadType load_type,
gpointer resource_name,
gint width,
gint height,
guint load_flags,
gint xcursor_number)
{
Win32Cursor *result;
result = g_new (Win32Cursor, 1);
result->load_type = load_type;
result->resource_name = resource_name;
result->width = width;
result->height = height;
result->load_flags = load_flags;
result->xcursor_number = xcursor_number;
return result;
}
static void
win32_cursor_destroy (gpointer data)
{
Win32Cursor *cursor = data;
/* resource_name could be a resource ID (uint16_t stored as a pointer),
* which shouldn't be freed.
*/
if (cursor->load_type == GDK_WIN32_CURSOR_LOAD_FROM_FILE)
g_free (cursor->resource_name);
g_free (cursor);
}
static void
win32_cursor_theme_load_from (Win32CursorTheme *theme,
gint size,
const gchar *dir)
{
GDir *gdir;
const gchar *filename;
HCURSOR hcursor;
gdir = g_dir_open (dir, 0, NULL);
if (gdir == NULL)
return;
while ((filename = g_dir_read_name (gdir)) != NULL)
{
gchar *fullname;
gunichar2 *filenamew;
gchar *cursor_name;
gchar *dot;
Win32Cursor *cursor;
fullname = g_build_filename (dir, filename, NULL);
filenamew = g_utf8_to_utf16 (fullname, -1, NULL, NULL, NULL);
g_free (fullname);
if (filenamew == NULL)
continue;
hcursor = LoadImageW (NULL, filenamew, IMAGE_CURSOR, size, size,
LR_LOADFROMFILE | (size == 0 ? LR_DEFAULTSIZE : 0));
if (hcursor == NULL)
{
g_free (filenamew);
continue;
}
DestroyCursor (hcursor);
dot = strchr (filename, '.');
cursor_name = dot ? g_strndup (filename, dot - filename) : g_strdup (filename);
cursor = win32_cursor_new (GDK_WIN32_CURSOR_LOAD_FROM_FILE,
filenamew,
size,
size,
LR_LOADFROMFILE | (size == 0 ? LR_DEFAULTSIZE : 0),
0);
g_hash_table_insert (theme->named_cursors, cursor_name, cursor);
}
}
static void
win32_cursor_theme_load_from_dirs (Win32CursorTheme *theme,
const gchar *name,
gint size)
{
gchar *theme_dir;
const gchar * const *dirs;
gint i;
dirs = g_get_system_data_dirs ();
/* <prefix>/share/icons */
for (i = 0; dirs[i]; i++)
{
theme_dir = g_build_filename (dirs[i], "icons", name, "cursors", NULL);
win32_cursor_theme_load_from (theme, size, theme_dir);
g_free (theme_dir);
}
/* ~/.icons */
theme_dir = g_build_filename (g_get_home_dir (), "icons", name, "cursors", NULL);
win32_cursor_theme_load_from (theme, size, theme_dir);
g_free (theme_dir);
}
static void
win32_cursor_theme_load_system (Win32CursorTheme *theme,
gint size)
{
gint i;
HCURSOR hcursor;
Win32Cursor *cursor;
for (i = 0; i < G_N_ELEMENTS (cursors); i++)
{
if (cursors[i].name == NULL)
break;
hcursor = NULL;
/* Prefer W32 cursors */
if (cursors[i].builtin)
hcursor = LoadImageA (NULL, cursors[i].builtin, IMAGE_CURSOR,
size, size,
LR_SHARED | (size == 0 ? LR_DEFAULTSIZE : 0));
/* Fall back to X cursors, but only if we've got no theme cursor */
if (hcursor == NULL && g_hash_table_lookup (theme->named_cursors, cursors[i].name) == NULL)
hcursor = hcursor_from_x_cursor (i, cursors[i].name);
if (hcursor == NULL)
continue;
DestroyCursor (hcursor);
cursor = win32_cursor_new (GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_NULL,
(gpointer) cursors[i].builtin,
size,
size,
LR_SHARED | (size == 0 ? LR_DEFAULTSIZE : 0),
0);
g_hash_table_insert (theme->named_cursors,
g_strdup (cursors[i].name),
cursor);
}
for (i = 0; i < G_N_ELEMENTS (default_cursors); i++)
{
if (default_cursors[i].name == NULL)
break;
hcursor = LoadImageA (NULL, default_cursors[i].id, IMAGE_CURSOR, size, size,
LR_SHARED | (size == 0 ? LR_DEFAULTSIZE : 0));
if (hcursor == NULL)
continue;
DestroyCursor (hcursor);
cursor = win32_cursor_new (GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_NULL,
(gpointer) default_cursors[i].id,
size,
size,
LR_SHARED | (size == 0 ? LR_DEFAULTSIZE : 0),
0);
g_hash_table_insert (theme->named_cursors,
g_strdup (default_cursors[i].name),
cursor);
}
}
Win32CursorTheme *
win32_cursor_theme_load (const gchar *name,
gint size)
{
Win32CursorTheme *result = g_new0 (Win32CursorTheme, 1);
result->named_cursors = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
win32_cursor_destroy);
if (strcmp (name, "system") == 0)
{
win32_cursor_theme_load_from_dirs (result, "Adwaita", size);
win32_cursor_theme_load_system (result, size);
}
else
{
win32_cursor_theme_load_from_dirs (result, name, size);
}
if (g_hash_table_size (result->named_cursors) > 0)
return result;
win32_cursor_theme_destroy (result);
return NULL;
}
void
win32_cursor_theme_destroy (Win32CursorTheme *theme)
{
g_hash_table_destroy (theme->named_cursors);
g_free (theme);
}
Win32Cursor *
win32_cursor_theme_get_cursor (Win32CursorTheme *theme,
const gchar *name)
{
return g_hash_table_lookup (theme->named_cursors, name);
}
static void
gdk_win32_cursor_remove_from_cache (gpointer data, GObject *cursor)
{
GdkDisplay *display = data;
HCURSOR hcursor;
hcursor = g_hash_table_lookup (GDK_WIN32_DISPLAY (display)->cursors, cursor);
if (GetCursor () == hcursor)
SetCursor (NULL);
if (!DestroyCursor (hcursor))
g_warning (G_STRLOC ": DestroyCursor (%p) failed: %lu", hcursor, GetLastError ());
}
void
_gdk_win32_display_finalize_cursors (GdkWin32Display *display)
{
GHashTableIter iter;
gpointer cursor;
if (display->cursors)
{
g_hash_table_iter_init (&iter, display->cursors);
while (g_hash_table_iter_next (&iter, &cursor, NULL))
g_object_weak_unref (G_OBJECT (cursor),
gdk_win32_cursor_remove_from_cache,
GDK_DISPLAY (display));
g_hash_table_unref (display->cursors);
}
g_free (display->cursor_theme_name);
if (display->cursor_theme)
win32_cursor_theme_destroy (display->cursor_theme);
}
void
_gdk_win32_display_init_cursors (GdkWin32Display *display)
{
display->cursors = g_hash_table_new (gdk_cursor_hash,
gdk_cursor_equal);
display->cursor_theme_name = g_strdup ("system");
}
/* This is where we use the names mapped to the equivilants that Windows define by default */
static HCURSOR
hcursor_idc_from_name (const gchar *name)
{
int i;
for (i = 0; i < G_N_ELEMENTS (default_cursors); i++)
{
if (strcmp (default_cursors[i].name, name) != 0)
continue;
return LoadImageA (NULL, default_cursors[i].id, IMAGE_CURSOR, 0, 0,
LR_SHARED | LR_DEFAULTSIZE);
}
return NULL;
}
static HCURSOR
hcursor_x_from_name (const gchar *name)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (cursors); i++)
if (cursors[i].name == NULL || strcmp (cursors[i].name, name) == 0)
return hcursor_from_x_cursor (i, name);
return NULL;
}
static HCURSOR
hcursor_from_theme (GdkDisplay *display,
const gchar *name)
{
Win32CursorTheme *theme;
Win32Cursor *theme_cursor;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
if (name == NULL)
return NULL;
theme = _gdk_win32_display_get_cursor_theme (win32_display);
theme_cursor = win32_cursor_theme_get_cursor (theme, name);
if (theme_cursor == NULL)
return NULL;
return win32_cursor_create_hcursor (theme_cursor, name);
}
static HCURSOR
hcursor_from_name (GdkDisplay *display,
const gchar *name)
{
HCURSOR hcursor;
/* Try current theme first */
hcursor = hcursor_from_theme (display, name);
if (hcursor != NULL)
return hcursor;
hcursor = hcursor_idc_from_name (name);
if (hcursor != NULL)
return hcursor;
hcursor = hcursor_x_from_name (name);
return hcursor;
}
/* Create a blank cursor */
static HCURSOR
create_blank_cursor (void)
{
gint w, h;
guchar *and_plane, *xor_plane;
HCURSOR rv;
w = GetSystemMetrics (SM_CXCURSOR);
h = GetSystemMetrics (SM_CYCURSOR);
and_plane = g_malloc ((w/8) * h);
memset (and_plane, 0xff, (w/8) * h);
xor_plane = g_malloc ((w/8) * h);
memset (xor_plane, 0, (w/8) * h);
rv = CreateCursor (_gdk_app_hmodule, 0, 0,
w, h, and_plane, xor_plane);
if (rv == NULL)
WIN32_API_FAILED ("CreateCursor");
return rv;
}
static HCURSOR
gdk_win32_cursor_create_for_name (GdkDisplay *display,
const gchar *name)
{
HCURSOR hcursor = NULL;
GdkCursor *result;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
/* Blank cursor case */
if (strcmp (name, "none") == 0)
return create_blank_cursor ();
hcursor = hcursor_from_name (display, name);
/* allow to load named cursor resources linked into the executable */
if (!hcursor)
hcursor = LoadCursor (_gdk_app_hmodule, name);
if (hcursor == NULL)
return NULL;
return hcursor;
}
static HICON
pixbuf_to_hicon (GdkPixbuf *pixbuf,
gboolean is_icon,
gint x,
gint y);
static HCURSOR
gdk_win32_cursor_create_for_texture (GdkDisplay *display,
GdkTexture *texture,
int x,
int y)
{
cairo_surface_t *surface;
GdkPixbuf *pixbuf;
gint width, height;
HICON icon;
surface = gdk_texture_download_surface (texture);
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0, width, height);
icon = pixbuf_to_hicon (pixbuf, TRUE, 0, 0);
g_object_unref (pixbuf);
return (HCURSOR)icon;
}
GdkCursor *
gdk_win32_display_cursor_from_hcursor (GdkDisplay *display,
HCURSOR hcursor)
{
GHashTableIter iter;
gpointer cursor_current, hcursor_current;
GdkCursor *cursor = NULL;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
if (win32_display->cursors)
{
g_hash_table_iter_init (&iter, win32_display->cursors);
while (g_hash_table_iter_next (&iter, &cursor_current, &hcursor_current))
if ((HCURSOR)hcursor_current == hcursor)
{
cursor = (GdkCursor*) cursor_current;
break;
}
}
return cursor;
}
HCURSOR
_gdk_win32_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
HCURSOR hcursor;
GdkPixbuf *pixbuf;
gint width, height;
g_return_val_if_fail (surface != NULL, NULL);
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
pixbuf = gdk_pixbuf_get_from_surface (surface,
0,
0,
width,
height);
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);
hcursor = _gdk_win32_pixbuf_to_hcursor (pixbuf, x, y);
g_object_unref (pixbuf);
return hcursor;
}
static gboolean
_gdk_win32_cursor_update (GdkWin32Display *win32_display,
GdkCursor *cursor,
HCURSOR hcursor)
{
HCURSOR hcursor_new = NULL;
Win32CursorTheme *theme;
Win32Cursor *theme_cursor;
const gchar *name = gdk_cursor_get_name (cursor);
/* Do nothing if this is not a named cursor. */
if (name == NULL)
return FALSE;
theme = _gdk_win32_display_get_cursor_theme (win32_display);
theme_cursor = win32_cursor_theme_get_cursor (theme, name);
if (theme_cursor != NULL)
hcursor_new = win32_cursor_create_hcursor (theme_cursor, name);
if (hcursor_new == NULL)
{
g_warning (G_STRLOC ": Unable to load %s from the cursor theme", name);
hcursor_new = hcursor_idc_from_name (name);
if (hcursor_new == NULL)
hcursor_new = hcursor_x_from_name (name);
if (hcursor_new == NULL)
return FALSE;
}
if (GetCursor () == hcursor)
SetCursor (hcursor_new);
if (!DestroyCursor (hcursor))
g_warning (G_STRLOC ": DestroyCursor (%p) failed: %lu", hcursor, GetLastError ());
g_hash_table_replace (win32_display->cursors, cursor, hcursor_new);
return TRUE;
}
void
_gdk_win32_display_update_cursors (GdkWin32Display *display)
{
GHashTableIter iter;
GdkCursor *cursor;
HCURSOR hcursor;
g_hash_table_iter_init (&iter, display->cursors);
while (g_hash_table_iter_next (&iter, (gpointer *) &cursor, &hcursor))
_gdk_win32_cursor_update (display, cursor, hcursor);
}
GdkPixbuf *
gdk_win32_icon_to_pixbuf_libgtk_only (HICON hicon,
gdouble *x_hot,
gdouble *y_hot)
{
GdkPixbuf *pixbuf = NULL;
ICONINFO ii;
struct
{
BITMAPINFOHEADER bi;
RGBQUAD colors[2];
} bmi;
HDC hdc;
guchar *pixels, *bits;
gint rowstride, x, y, w, h;
if (!GDI_CALL (GetIconInfo, (hicon, &ii)))
return NULL;
if (!(hdc = CreateCompatibleDC (NULL)))
{
WIN32_GDI_FAILED ("CreateCompatibleDC");
goto out0;
}
memset (&bmi, 0, sizeof (bmi));
bmi.bi.biSize = sizeof (bmi.bi);
if (ii.hbmColor != NULL)
{
/* Colour cursor */
gboolean no_alpha;
if (!GDI_CALL (GetDIBits, (hdc, ii.hbmColor, 0, 1, NULL, (BITMAPINFO *)&bmi, DIB_RGB_COLORS)))
goto out1;
w = bmi.bi.biWidth;
h = bmi.bi.biHeight;
bmi.bi.biBitCount = 32;
bmi.bi.biCompression = BI_RGB;
bmi.bi.biHeight = -h;
bits = g_malloc0 (4 * w * h);
/* color data */
if (!GDI_CALL (GetDIBits, (hdc, ii.hbmColor, 0, h, bits, (BITMAPINFO *)&bmi, DIB_RGB_COLORS)))
goto out2;
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, w, h);
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
no_alpha = TRUE;
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
pixels[2] = bits[(x+y*w) * 4];
pixels[1] = bits[(x+y*w) * 4 + 1];
pixels[0] = bits[(x+y*w) * 4 + 2];
pixels[3] = bits[(x+y*w) * 4 + 3];
if (no_alpha && pixels[3] > 0)
no_alpha = FALSE;
pixels += 4;
}
pixels += (w * 4 - rowstride);
}
/* mask */
if (no_alpha &&
GDI_CALL (GetDIBits, (hdc, ii.hbmMask, 0, h, bits, (BITMAPINFO *)&bmi, DIB_RGB_COLORS)))
{
pixels = gdk_pixbuf_get_pixels (pixbuf);
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
pixels[3] = 255 - bits[(x + y * w) * 4];
pixels += 4;
}
pixels += (w * 4 - rowstride);
}
}
}
else
{
/* B&W cursor */
int bpl;
if (!GDI_CALL (GetDIBits, (hdc, ii.hbmMask, 0, 0, NULL, (BITMAPINFO *)&bmi, DIB_RGB_COLORS)))
goto out1;
w = bmi.bi.biWidth;
h = ABS (bmi.bi.biHeight) / 2;
bits = g_malloc0 (4 * w * h);
/* masks */
if (!GDI_CALL (GetDIBits, (hdc, ii.hbmMask, 0, h*2, bits, (BITMAPINFO *)&bmi, DIB_RGB_COLORS)))
goto out2;
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, w, h);
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
bpl = ((w-1)/32 + 1)*4;
#if 0
for (y = 0; y < h*2; y++)
{
for (x = 0; x < w; x++)
{
const gint bit = 7 - (x % 8);
printf ("%c ", ((bits[bpl*y+x/8])&(1<<bit)) ? ' ' : 'X');
}
printf ("\n");
}
#endif
for (y = 0; y < h; y++)
{
const guchar *andp, *xorp;
if (bmi.bi.biHeight < 0)
{
andp = bits + bpl*y;
xorp = bits + bpl*(h+y);
}
else
{
andp = bits + bpl*(h-y-1);
xorp = bits + bpl*(h+h-y-1);
}
for (x = 0; x < w; x++)
{
const gint bit = 7 - (x % 8);
if ((*andp) & (1<<bit))
{
if ((*xorp) & (1<<bit))
pixels[2] = pixels[1] = pixels[0] = 0xFF;
else
pixels[2] = pixels[1] = pixels[0] = 0;
pixels[3] = 0xFF;
}
else
{
pixels[2] = pixels[1] = pixels[0] = 0;
pixels[3] = 0;
}
pixels += 4;
if (bit == 0)
{
andp++;
xorp++;
}
}
pixels += (w * 4 - rowstride);
}
}
if (x_hot)
*x_hot = ii.xHotspot;
if (y_hot)
*y_hot = ii.yHotspot;
/* release temporary resources */
out2:
g_free (bits);
out1:
DeleteDC (hdc);
out0:
DeleteObject (ii.hbmColor);
DeleteObject (ii.hbmMask);
return pixbuf;
}
gboolean
_gdk_win32_display_supports_cursor_alpha (GdkDisplay *display)
{
return TRUE;
}
gboolean
_gdk_win32_display_supports_cursor_color (GdkDisplay *display)
{
return TRUE;
}
void
_gdk_win32_display_get_default_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
/* TODO: Use per-monitor DPI functions (8.1 and newer) or
* calculate DPI ourselves and use that, assuming that 72 dpi
* corresponds to 32x32 cursors. Take into account that DPI
* can be artificially increased by the user to make stuff bigger.
*/
if (width)
*width = GetSystemMetrics (SM_CXCURSOR);
if (height)
*height = GetSystemMetrics (SM_CYCURSOR);
}
void
_gdk_win32_display_get_maximal_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
if (width)
*width = GetSystemMetrics (SM_CXCURSOR);
if (height)
*height = GetSystemMetrics (SM_CYCURSOR);
}
/* Convert a pixbuf to an HICON (or HCURSOR). Supports alpha under
* Windows XP, thresholds alpha otherwise. Also used from
* gdkwindow-win32.c for creating application icons.
*/
static HBITMAP
create_alpha_bitmap (gint size,
guchar **outdata)
{
BITMAPV5HEADER bi;
HDC hdc;
HBITMAP hBitmap;
ZeroMemory (&bi, sizeof (BITMAPV5HEADER));
bi.bV5Size = sizeof (BITMAPV5HEADER);
bi.bV5Height = bi.bV5Width = size;
bi.bV5Planes = 1;
bi.bV5BitCount = 32;
bi.bV5Compression = BI_BITFIELDS;
/* The following mask specification specifies a supported 32 BPP
* alpha format for Windows XP (BGRA format).
*/
bi.bV5RedMask = 0x00FF0000;
bi.bV5GreenMask = 0x0000FF00;
bi.bV5BlueMask = 0x000000FF;
bi.bV5AlphaMask = 0xFF000000;
/* Create the DIB section with an alpha channel. */
hdc = GetDC (NULL);
if (!hdc)
{
WIN32_GDI_FAILED ("GetDC");
return NULL;
}
hBitmap = CreateDIBSection (hdc, (BITMAPINFO *)&bi, DIB_RGB_COLORS,
(PVOID *) outdata, NULL, (DWORD)0);
if (hBitmap == NULL)
WIN32_GDI_FAILED ("CreateDIBSection");
ReleaseDC (NULL, hdc);
return hBitmap;
}
static HBITMAP
create_color_bitmap (gint size,
guchar **outdata,
gint bits)
{
struct {
BITMAPV4HEADER bmiHeader;
RGBQUAD bmiColors[2];
} bmi;
HDC hdc;
HBITMAP hBitmap;
ZeroMemory (&bmi, sizeof (bmi));
bmi.bmiHeader.bV4Size = sizeof (BITMAPV4HEADER);
bmi.bmiHeader.bV4Height = bmi.bmiHeader.bV4Width = size;
bmi.bmiHeader.bV4Planes = 1;
bmi.bmiHeader.bV4BitCount = bits;
bmi.bmiHeader.bV4V4Compression = BI_RGB;
/* when bits is 1, these will be used.
* bmiColors[0] already zeroed from ZeroMemory()
*/
bmi.bmiColors[1].rgbBlue = 0xFF;
bmi.bmiColors[1].rgbGreen = 0xFF;
bmi.bmiColors[1].rgbRed = 0xFF;
hdc = GetDC (NULL);
if (!hdc)
{
WIN32_GDI_FAILED ("GetDC");
return NULL;
}
hBitmap = CreateDIBSection (hdc, (BITMAPINFO *)&bmi, DIB_RGB_COLORS,
(PVOID *) outdata, NULL, (DWORD)0);
if (hBitmap == NULL)
WIN32_GDI_FAILED ("CreateDIBSection");
ReleaseDC (NULL, hdc);
return hBitmap;
}
static gboolean
pixbuf_to_hbitmaps_alpha_winxp (GdkPixbuf *pixbuf,
HBITMAP *color,
HBITMAP *mask)
{
/* Based on code from
* http://www.dotnet247.com/247reference/msgs/13/66301.aspx
*/
HBITMAP hColorBitmap, hMaskBitmap;
guchar *indata, *inrow;
guchar *colordata, *colorrow, *maskdata, *maskbyte;
gint width, height, size, i, i_offset, j, j_offset, rowstride;
guint maskstride, mask_bit;
width = gdk_pixbuf_get_width (pixbuf); /* width of icon */
height = gdk_pixbuf_get_height (pixbuf); /* height of icon */
/* The bitmaps are created square */
size = MAX (width, height);
hColorBitmap = create_alpha_bitmap (size, &colordata);
if (!hColorBitmap)
return FALSE;
hMaskBitmap = create_color_bitmap (size, &maskdata, 1);
if (!hMaskBitmap)
{
DeleteObject (hColorBitmap);
return FALSE;
}
/* MSDN says mask rows are aligned to "LONG" boundaries */
maskstride = (((size + 31) & ~31) >> 3);
indata = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
if (width > height)
{
i_offset = 0;
j_offset = (width - height) / 2;
}
else
{
i_offset = (height - width) / 2;
j_offset = 0;
}
for (j = 0; j < height; j++)
{
colorrow = colordata + 4*(j+j_offset)*size + 4*i_offset;
maskbyte = maskdata + (j+j_offset)*maskstride + i_offset/8;
mask_bit = (0x80 >> (i_offset % 8));
inrow = indata + (height-j-1)*rowstride;
for (i = 0; i < width; i++)
{
colorrow[4*i+0] = inrow[4*i+2];
colorrow[4*i+1] = inrow[4*i+1];
colorrow[4*i+2] = inrow[4*i+0];
colorrow[4*i+3] = inrow[4*i+3];
if (inrow[4*i+3] == 0)
maskbyte[0] |= mask_bit; /* turn ON bit */
else
maskbyte[0] &= ~mask_bit; /* turn OFF bit */
mask_bit >>= 1;
if (mask_bit == 0)
{
mask_bit = 0x80;
maskbyte++;
}
}
}
*color = hColorBitmap;
*mask = hMaskBitmap;
return TRUE;
}
static gboolean
pixbuf_to_hbitmaps_normal (GdkPixbuf *pixbuf,
HBITMAP *color,
HBITMAP *mask)
{
/* Based on code from
* http://www.dotnet247.com/247reference/msgs/13/66301.aspx
*/
HBITMAP hColorBitmap, hMaskBitmap;
guchar *indata, *inrow;
guchar *colordata, *colorrow, *maskdata, *maskbyte;
gint width, height, size, i, i_offset, j, j_offset, rowstride, nc, bmstride;
gboolean has_alpha;
guint maskstride, mask_bit;
width = gdk_pixbuf_get_width (pixbuf); /* width of icon */
height = gdk_pixbuf_get_height (pixbuf); /* height of icon */
/* The bitmaps are created square */
size = MAX (width, height);
hColorBitmap = create_color_bitmap (size, &colordata, 24);
if (!hColorBitmap)
return FALSE;
hMaskBitmap = create_color_bitmap (size, &maskdata, 1);
if (!hMaskBitmap)
{
DeleteObject (hColorBitmap);
return FALSE;
}
/* rows are always aligned on 4-byte boundarys */
bmstride = size * 3;
if (bmstride % 4 != 0)
bmstride += 4 - (bmstride % 4);
/* MSDN says mask rows are aligned to "LONG" boundaries */
maskstride = (((size + 31) & ~31) >> 3);
indata = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
nc = gdk_pixbuf_get_n_channels (pixbuf);
has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
if (width > height)
{
i_offset = 0;
j_offset = (width - height) / 2;
}
else
{
i_offset = (height - width) / 2;
j_offset = 0;
}
for (j = 0; j < height; j++)
{
colorrow = colordata + (j+j_offset)*bmstride + 3*i_offset;
maskbyte = maskdata + (j+j_offset)*maskstride + i_offset/8;
mask_bit = (0x80 >> (i_offset % 8));
inrow = indata + (height-j-1)*rowstride;
for (i = 0; i < width; i++)
{
if (has_alpha && inrow[nc*i+3] < 128)
{
colorrow[3*i+0] = colorrow[3*i+1] = colorrow[3*i+2] = 0;
maskbyte[0] |= mask_bit; /* turn ON bit */
}
else
{
colorrow[3*i+0] = inrow[nc*i+2];
colorrow[3*i+1] = inrow[nc*i+1];
colorrow[3*i+2] = inrow[nc*i+0];
maskbyte[0] &= ~mask_bit; /* turn OFF bit */
}
mask_bit >>= 1;
if (mask_bit == 0)
{
mask_bit = 0x80;
maskbyte++;
}
}
}
*color = hColorBitmap;
*mask = hMaskBitmap;
return TRUE;
}
static HICON
pixbuf_to_hicon (GdkPixbuf *pixbuf,
gboolean is_icon,
gint x,
gint y)
{
ICONINFO ii;
HICON icon;
gboolean success;
if (pixbuf == NULL)
return NULL;
if (gdk_pixbuf_get_has_alpha (pixbuf))
success = pixbuf_to_hbitmaps_alpha_winxp (pixbuf, &ii.hbmColor, &ii.hbmMask);
else
success = pixbuf_to_hbitmaps_normal (pixbuf, &ii.hbmColor, &ii.hbmMask);
if (!success)
return NULL;
ii.fIcon = is_icon;
ii.xHotspot = x;
ii.yHotspot = y;
icon = CreateIconIndirect (&ii);
DeleteObject (ii.hbmColor);
DeleteObject (ii.hbmMask);
return icon;
}
HICON
_gdk_win32_texture_to_hicon (GdkTexture *texture)
{
cairo_surface_t *surface;
GdkPixbuf *pixbuf;
gint width, height;
HICON icon;
surface = gdk_texture_download_surface (texture);
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0, width, height);
icon = pixbuf_to_hicon (pixbuf, TRUE, 0, 0);
g_object_unref (pixbuf);
return icon;
}
HICON
_gdk_win32_pixbuf_to_hcursor (GdkPixbuf *pixbuf,
gint x_hotspot,
gint y_hotspot)
{
return pixbuf_to_hicon (pixbuf, FALSE, x_hotspot, y_hotspot);
}
/**
* gdk_win32_display_get_hcursor:
* @display: (type GdkWin32Display): a #GdkDisplay
* @cursor: a #GdkCursor.
*
* Returns the Win32 HCURSOR belonging to a #GdkCursor, potentially
* creating the cursor.
*
* Be aware that the returned cursor may not be unique to @cursor.
* It may for example be shared with its fallback cursor.
*
* Returns: a Win32 HCURSOR.
**/
HCURSOR
gdk_win32_display_get_hcursor (GdkDisplay *display,
GdkCursor *cursor)
{
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
HCURSOR hcursor;
g_return_val_if_fail (cursor != NULL, NULL);
if (gdk_display_is_closed (display))
return NULL;
hcursor = g_hash_table_lookup (win32_display->cursors, cursor);
if (hcursor != NULL)
return hcursor;
if (gdk_cursor_get_name (cursor))
hcursor = gdk_win32_cursor_create_for_name (display, gdk_cursor_get_name (cursor));
else
hcursor = gdk_win32_cursor_create_for_texture (display,
gdk_cursor_get_texture (cursor),
gdk_cursor_get_hotspot_x (cursor),
gdk_cursor_get_hotspot_y (cursor));
if (hcursor != NULL)
{
g_object_weak_ref (G_OBJECT (cursor), gdk_win32_cursor_remove_from_cache, display);
g_hash_table_insert (win32_display->cursors, cursor, hcursor);
return hcursor;
}
if (gdk_cursor_get_fallback (cursor))
return gdk_win32_display_get_hcursor (display, gdk_cursor_get_fallback (cursor));
return NULL;
}
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