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gtk2/gdk/win32/gdkcursor-win32.c
Chun-wei Fan 38ad068d9b GDK-Win32: Remove extraneous call to _gdk_win32_append_event() 
Apparently, by comparing with the other backends, we should not call
_gdk_win32_append_event() after calling gdk_scroll_event_new() but we should
call it after calling gdk_scroll_event_new_discrete(), which was why we didn't
restore the cursor after we scroll using the mouse wheel and didn't manage to
remove the shade that appears after we scrolled to the very top or very bottom.

Also, as suggested by the reporter, use IDC_SIZEALL for the system cursor that
we fall back to if no cursor theme is installed, as with other Windows
programs.

This should really fix issue #3581.
2021-03-17 11:22:23 +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 "gdkcursor.h"
#include "gdkwin32.h"
#include "gdktextureprivate.h"
#include "gdkintl.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 },
{ "all-scroll", IDC_SIZEALL },
{ "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 }
};
typedef struct _GdkWin32HCursorTableEntry GdkWin32HCursorTableEntry;
struct _GdkWin32HCursorTableEntry
{
HCURSOR handle;
guint64 refcount;
gboolean destroyable;
};
struct _GdkWin32HCursor
{
GObject parent_instance;
/* Do not do any modifications to the handle
* (i.e. do not call DestroyCursor() on it).
* It's a "read-only" copy, the original is stored
* in the display instance.
*/
HANDLE readonly_handle;
/* This is a way to access the real handle stored
* in the display.
* TODO: make it a weak reference
*/
GdkWin32Display *display;
/* A copy of the "destoyable" attribute of the handle */
gboolean readonly_destroyable;
};
struct _GdkWin32HCursorClass
{
GObjectClass parent_class;
};
enum
{
PROP_0,
PROP_DISPLAY,
PROP_HANDLE,
PROP_DESTROYABLE,
NUM_PROPERTIES
};
G_DEFINE_TYPE (GdkWin32HCursor, gdk_win32_hcursor, G_TYPE_OBJECT)
static void
gdk_win32_hcursor_init (GdkWin32HCursor *win32_hcursor)
{
}
static void
gdk_win32_hcursor_finalize (GObject *gobject)
{
GdkWin32HCursor *win32_hcursor = GDK_WIN32_HCURSOR (gobject);
if (win32_hcursor->display)
_gdk_win32_display_hcursor_unref (win32_hcursor->display, win32_hcursor->readonly_handle);
g_clear_object (&win32_hcursor->display);
G_OBJECT_CLASS (gdk_win32_hcursor_parent_class)->finalize (G_OBJECT (win32_hcursor));
}
static void
gdk_win32_hcursor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkWin32HCursor *win32_hcursor;
win32_hcursor = GDK_WIN32_HCURSOR (object);
switch (prop_id)
{
case PROP_DISPLAY:
g_set_object (&win32_hcursor->display, g_value_get_object (value));
break;
case PROP_DESTROYABLE:
win32_hcursor->readonly_destroyable = g_value_get_boolean (value);
break;
case PROP_HANDLE:
win32_hcursor->readonly_handle = g_value_get_pointer (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_win32_hcursor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkWin32HCursor *win32_hcursor;
win32_hcursor = GDK_WIN32_HCURSOR (object);
switch (prop_id)
{
case PROP_DISPLAY:
g_value_set_object (value, win32_hcursor->display);
break;
case PROP_DESTROYABLE:
g_value_set_boolean (value, win32_hcursor->readonly_destroyable);
break;
case PROP_HANDLE:
g_value_set_pointer (value, win32_hcursor->readonly_handle);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_win32_hcursor_constructed (GObject *object)
{
GdkWin32HCursor *win32_hcursor;
win32_hcursor = GDK_WIN32_HCURSOR (object);
g_assert_nonnull (win32_hcursor->display);
g_assert_nonnull (win32_hcursor->readonly_handle);
_gdk_win32_display_hcursor_ref (win32_hcursor->display,
win32_hcursor->readonly_handle,
win32_hcursor->readonly_destroyable);
}
static GParamSpec *hcursor_props[NUM_PROPERTIES] = { NULL, };
static void
gdk_win32_hcursor_class_init (GdkWin32HCursorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdk_win32_hcursor_finalize;
object_class->constructed = gdk_win32_hcursor_constructed;
object_class->get_property = gdk_win32_hcursor_get_property;
object_class->set_property = gdk_win32_hcursor_set_property;
hcursor_props[PROP_DISPLAY] =
g_param_spec_object ("display",
P_("Display"),
P_("The display that will use this cursor"),
GDK_TYPE_DISPLAY,
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
hcursor_props[PROP_HANDLE] =
g_param_spec_pointer ("handle",
P_("Handle"),
P_("The HCURSOR handle for this cursor"),
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
hcursor_props[PROP_DESTROYABLE] =
g_param_spec_boolean ("destroyable",
P_("Destroyable"),
P_("Whether calling DestroyCursor() is allowed on this cursor"),
TRUE,
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
g_object_class_install_properties (object_class, NUM_PROPERTIES, hcursor_props);
}
GdkWin32HCursor *
gdk_win32_hcursor_new (GdkWin32Display *display,
HCURSOR handle,
gboolean destroyable)
{
return g_object_new (GDK_TYPE_WIN32_HCURSOR,
"display", display,
"handle", handle,
"destroyable", destroyable,
NULL);
}
void
_gdk_win32_display_hcursor_ref (GdkWin32Display *display,
HCURSOR handle,
gboolean destroyable)
{
GdkWin32HCursorTableEntry *entry;
entry = g_hash_table_lookup (display->cursor_reftable, handle);
if (entry)
{
if (entry->destroyable != destroyable)
g_warning ("Destroyability metadata for cursor handle 0x%p does not match", handle);
entry->refcount += 1;
return;
}
entry = g_new0 (GdkWin32HCursorTableEntry, 1);
entry->handle = handle;
entry->destroyable = destroyable;
entry->refcount = 1;
g_hash_table_insert (display->cursor_reftable, handle, entry);
display->cursors_for_destruction = g_list_remove_all (display->cursors_for_destruction, handle);
}
static gboolean
delayed_cursor_destruction (gpointer user_data)
{
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (user_data);
HANDLE current_hcursor = GetCursor ();
GList *p;
win32_display->idle_cursor_destructor_id = 0;
for (p = win32_display->cursors_for_destruction; p; p = p->next)
{
HCURSOR handle = (HCURSOR) p->data;
if (handle == NULL)
continue;
if (current_hcursor == handle)
{
SetCursor (NULL);
current_hcursor = NULL;
}
if (!DestroyCursor (handle))
g_warning (G_STRLOC ": DestroyCursor (%p) failed: %lu", handle, GetLastError ());
}
g_list_free (win32_display->cursors_for_destruction);
win32_display->cursors_for_destruction = NULL;
return G_SOURCE_REMOVE;
}
void
_gdk_win32_display_hcursor_unref (GdkWin32Display *display,
HCURSOR handle)
{
GdkWin32HCursorTableEntry *entry;
gboolean destroyable;
entry = g_hash_table_lookup (display->cursor_reftable, handle);
if (!entry)
{
g_warning ("Trying to forget cursor handle 0x%p that is not in the table", handle);
return;
}
entry->refcount -= 1;
if (entry->refcount > 0)
return;
destroyable = entry->destroyable;
g_hash_table_remove (display->cursor_reftable, handle);
g_free (entry);
if (!destroyable)
return;
/* GDK tends to destroy a cursor first, then set a new one.
* This results in repeated oscillations between SetCursor(NULL)
* and SetCursor(hcursor). To avoid that, delay cursor destruction a bit
* to let GDK set a new one first. That way cursors are switched
* seamlessly, without a NULL cursor between them.
* If GDK sets the new cursor to the same handle the old cursor had,
* the cursor handle is taken off the destruction list.
*/
if (g_list_find (display->cursors_for_destruction, handle) == NULL)
{
display->cursors_for_destruction = g_list_prepend (display->cursors_for_destruction, handle);
if (display->idle_cursor_destructor_id == 0)
display->idle_cursor_destructor_id = g_idle_add (delayed_cursor_destruction, display);
}
}
#ifdef gdk_win32_hcursor_get_handle
#undef gdk_win32_hcursor_get_handle
#endif
HCURSOR
gdk_win32_hcursor_get_handle (GdkWin32HCursor *cursor)
{
return cursor->readonly_handle;
}
static HCURSOR
hcursor_from_x_cursor (int i,
const char *name)
{
int j, x, y, ofs;
HCURSOR rv;
int 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++)
{
int pofs = ofs + x / 8;
guchar data = (cursors[i].data[j/4] & (0xc0 >> (2 * (j%4)))) >> (2 * (3 - (j%4)));
int 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 GdkWin32HCursor *
win32_cursor_create_win32hcursor (GdkWin32Display *display,
Win32Cursor *cursor,
const char *name)
{
GdkWin32HCursor *result;
switch (cursor->load_type)
{
case GDK_WIN32_CURSOR_LOAD_FROM_FILE:
result = gdk_win32_hcursor_new (display,
LoadImageW (NULL,
cursor->resource_name,
IMAGE_CURSOR,
cursor->width,
cursor->height,
cursor->load_flags),
cursor->load_flags & LR_SHARED ? FALSE : TRUE);
break;
case GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_NULL:
result = gdk_win32_hcursor_new (display,
LoadImageA (NULL,
(const char *) cursor->resource_name,
IMAGE_CURSOR,
cursor->width,
cursor->height,
cursor->load_flags),
cursor->load_flags & LR_SHARED ? FALSE : TRUE);
break;
case GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_THIS:
result = gdk_win32_hcursor_new (display,
LoadImageA (_gdk_app_hmodule,
(const char *) cursor->resource_name,
IMAGE_CURSOR,
cursor->width,
cursor->height,
cursor->load_flags),
cursor->load_flags & LR_SHARED ? FALSE : TRUE);
break;
case GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_GTK:
result = gdk_win32_hcursor_new (display,
LoadImageA (_gdk_dll_hinstance,
(const char *) cursor->resource_name,
IMAGE_CURSOR,
cursor->width,
cursor->height,
cursor->load_flags),
cursor->load_flags & LR_SHARED ? FALSE : TRUE);
break;
case GDK_WIN32_CURSOR_CREATE:
result = gdk_win32_hcursor_new (display,
hcursor_from_x_cursor (cursor->xcursor_number,
name),
TRUE);
break;
default:
result = NULL;
}
return result;
}
static Win32Cursor *
win32_cursor_new (GdkWin32CursorLoadType load_type,
gpointer resource_name,
int width,
int height,
guint load_flags,
int 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,
int size,
const char *dir)
{
GDir *gdir;
const char *filename;
HCURSOR hcursor;
gdir = g_dir_open (dir, 0, NULL);
if (gdir == NULL)
return;
while ((filename = g_dir_read_name (gdir)) != NULL)
{
char *fullname;
gunichar2 *filenamew;
char *cursor_name;
char *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 char *name,
int size)
{
char *theme_dir;
const char * const *dirs;
int 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,
int size)
{
int i;
HCURSOR shared_hcursor;
HCURSOR x_hcursor;
Win32Cursor *cursor;
for (i = 0; i < G_N_ELEMENTS (cursors); i++)
{
if (cursors[i].name == NULL)
break;
shared_hcursor = NULL;
x_hcursor = NULL;
/* Prefer W32 cursors */
if (cursors[i].builtin)
shared_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 (shared_hcursor == NULL && g_hash_table_lookup (theme->named_cursors, cursors[i].name) == NULL)
x_hcursor = hcursor_from_x_cursor (i, cursors[i].name);
if (shared_hcursor == NULL && x_hcursor == NULL)
continue;
else if (x_hcursor != NULL)
DestroyCursor (x_hcursor);
cursor = win32_cursor_new (shared_hcursor ? GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_NULL : GDK_WIN32_CURSOR_CREATE,
(gpointer) cursors[i].builtin,
size,
size,
LR_SHARED | (size == 0 ? LR_DEFAULTSIZE : 0),
x_hcursor ? i : 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;
shared_hcursor = LoadImageA (NULL, default_cursors[i].id, IMAGE_CURSOR, size, size,
LR_SHARED | (size == 0 ? LR_DEFAULTSIZE : 0));
if (shared_hcursor == NULL)
continue;
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 char *name,
int 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 char *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;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
/* Unrefs the GdkWin32HCursor value object automatically */
g_hash_table_remove (win32_display->cursors, cursor);
}
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);
g_list_free (display->cursors_for_destruction);
display->cursors_for_destruction = NULL;
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_full (gdk_cursor_hash,
gdk_cursor_equal,
NULL,
g_object_unref);
display->cursor_reftable = g_hash_table_new (NULL, NULL);
display->cursor_theme_name = g_strdup ("system");
}
/* This is where we use the names mapped to the equivalents that Windows defines by default */
static GdkWin32HCursor *
win32hcursor_idc_from_name (GdkWin32Display *display,
const char *name)
{
int i;
for (i = 0; i < G_N_ELEMENTS (default_cursors); i++)
{
if (strcmp (default_cursors[i].name, name) != 0)
continue;
return gdk_win32_hcursor_new (display,
LoadImageA (NULL, default_cursors[i].id, IMAGE_CURSOR, 0, 0,
LR_SHARED | LR_DEFAULTSIZE),
FALSE);
}
return NULL;
}
static GdkWin32HCursor *
win32hcursor_x_from_name (GdkWin32Display *display,
const char *name)
{
int i;
for (i = 0; i < G_N_ELEMENTS (cursors); i++)
if (cursors[i].name == NULL || strcmp (cursors[i].name, name) == 0)
return gdk_win32_hcursor_new (display, hcursor_from_x_cursor (i, name), TRUE);
return NULL;
}
static GdkWin32HCursor *
win32hcursor_from_theme (GdkWin32Display *display,
const char *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_win32hcursor (win32_display, theme_cursor, name);
}
static GdkWin32HCursor *
win32hcursor_from_name (GdkWin32Display *display,
const char *name)
{
GdkWin32HCursor *win32hcursor;
/* Try current theme first */
win32hcursor = win32hcursor_from_theme (display, name);
if (win32hcursor != NULL)
return win32hcursor;
win32hcursor = win32hcursor_idc_from_name (display, name);
if (win32hcursor != NULL)
return win32hcursor;
win32hcursor = win32hcursor_x_from_name (display, name);
return win32hcursor;
}
/* Create a blank cursor */
static GdkWin32HCursor *
create_blank_win32hcursor (GdkWin32Display *display)
{
int 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 gdk_win32_hcursor_new (display, rv, TRUE);
}
static GdkWin32HCursor *
gdk_win32hcursor_create_for_name (GdkWin32Display *display,
const char *name)
{
GdkWin32HCursor *win32hcursor = NULL;
/* Blank cursor case */
if (strcmp (name, "none") == 0)
return create_blank_win32hcursor (display);
win32hcursor = win32hcursor_from_name (display, name);
if (win32hcursor)
return win32hcursor;
/* Allow to load named cursor resources linked into the executable.
* Cursors obtained with LoadCursor() cannot be destroyed.
*/
return gdk_win32_hcursor_new (display, LoadCursor (_gdk_app_hmodule, name), FALSE);
}
static HICON
pixbuf_to_hicon (GdkPixbuf *pixbuf,
gboolean is_icon,
int x,
int y);
static GdkWin32HCursor *
gdk_win32hcursor_create_for_texture (GdkWin32Display *display,
GdkTexture *texture,
int x,
int y)
{
cairo_surface_t *surface;
GdkPixbuf *pixbuf;
int 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 gdk_win32_hcursor_new (display, (HCURSOR) icon, TRUE);
}
static gboolean
_gdk_win32_cursor_update (GdkWin32Display *win32_display,
GdkCursor *cursor,
GdkWin32HCursor *win32_hcursor,
GList **update_cursors,
GList **update_win32hcursors)
{
GdkWin32HCursor *win32hcursor_new = NULL;
Win32CursorTheme *theme;
Win32Cursor *theme_cursor;
const char *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)
win32hcursor_new = win32_cursor_create_win32hcursor (win32_display, theme_cursor, name);
if (win32hcursor_new == NULL)
{
g_warning (G_STRLOC ": Unable to load %s from the cursor theme", name);
win32hcursor_new = win32hcursor_idc_from_name (win32_display, name);
if (win32hcursor_new == NULL)
win32hcursor_new = win32hcursor_x_from_name (win32_display, name);
if (win32hcursor_new == NULL)
return FALSE;
}
if (GetCursor () == win32_hcursor->readonly_handle)
SetCursor (win32hcursor_new->readonly_handle);
/* Don't modify the hash table mid-iteration, put everything into a list
* and update the table later on.
*/
*update_cursors = g_list_prepend (*update_cursors, cursor);
*update_win32hcursors = g_list_prepend (*update_win32hcursors, win32hcursor_new);
return TRUE;
}
void
_gdk_win32_display_update_cursors (GdkWin32Display *display)
{
GHashTableIter iter;
GdkCursor *cursor;
GdkWin32HCursor *win32hcursor;
GList *update_cursors = NULL;
GList *update_win32hcursors = NULL;
g_hash_table_iter_init (&iter, display->cursors);
while (g_hash_table_iter_next (&iter, (gpointer *) &cursor, (gpointer *) &win32hcursor))
_gdk_win32_cursor_update (display, cursor, win32hcursor, &update_cursors, &update_win32hcursors);
while (update_cursors != NULL && update_win32hcursors != NULL)
{
g_hash_table_replace (display->cursors, update_cursors->data, update_win32hcursors->data);
update_cursors = g_list_delete_link (update_cursors, update_cursors);
update_win32hcursors = g_list_delete_link (update_win32hcursors, update_win32hcursors);
}
g_assert (update_cursors == NULL && update_win32hcursors == NULL);
}
GdkPixbuf *
gdk_win32_icon_to_pixbuf_libgtk_only (HICON hicon,
double *x_hot,
double *y_hot)
{
GdkPixbuf *pixbuf = NULL;
ICONINFO ii;
struct
{
BITMAPINFOHEADER bi;
RGBQUAD colors[2];
} bmi;
HDC hdc;
guchar *pixels, *bits;
int 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 int 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 int 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;
}
/* Convert a pixbuf to an HICON (or HCURSOR). Supports alpha under
* Windows XP, thresholds alpha otherwise. Also used from
* gdksurface-win32.c for creating application icons.
*/
static HBITMAP
create_alpha_bitmap (int 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 (int size,
guchar **outdata,
int 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;
int 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;
int 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 boundaries */
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,
int x,
int 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;
int 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,
int x_hotspot,
int y_hotspot)
{
return pixbuf_to_hicon (pixbuf, FALSE, x_hotspot, y_hotspot);
}
/**
* gdk_win32_display_get_win32hcursor:
* @display: (type GdkWin32Display): a #GdkDisplay
* @cursor: a #GdkCursor.
*
* Returns the Win32 HCURSOR wrapper object belonging to a #GdkCursor,
* potentially creating the cursor object.
*
* Be aware that the returned cursor may not be unique to @cursor.
* It may for example be shared with its fallback cursor.
*
* Returns: a GdkWin32HCursor.
**/
GdkWin32HCursor *
gdk_win32_display_get_win32hcursor (GdkWin32Display *display,
GdkCursor *cursor)
{
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
GdkWin32HCursor *win32hcursor;
const char *cursor_name;
GdkCursor *fallback;
g_return_val_if_fail (cursor != NULL, NULL);
if (gdk_display_is_closed (GDK_DISPLAY (display)))
return NULL;
win32hcursor = g_hash_table_lookup (win32_display->cursors, cursor);
if (win32hcursor != NULL)
return win32hcursor;
cursor_name = gdk_cursor_get_name (cursor);
if (cursor_name)
win32hcursor = gdk_win32hcursor_create_for_name (display, cursor_name);
else
win32hcursor = gdk_win32hcursor_create_for_texture (display,
gdk_cursor_get_texture (cursor),
gdk_cursor_get_hotspot_x (cursor),
gdk_cursor_get_hotspot_y (cursor));
if (win32hcursor != NULL)
{
g_object_weak_ref (G_OBJECT (cursor), gdk_win32_cursor_remove_from_cache, display);
g_hash_table_insert (win32_display->cursors, cursor, win32hcursor);
return win32hcursor;
}
fallback = gdk_cursor_get_fallback (cursor);
if (fallback)
return gdk_win32_display_get_win32hcursor (display, fallback);
return NULL;
}
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