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gtk2/gdk/win32/gdkcursor-win32.c
Руслан Ижбулатов 26c24328d5 GDK: Add cursor theme support to W32 backend 
Load themed cursors from the same places they are loaded on freedesktop systems,
but use W32 API functions to do so (works for .cur/.ani cursors instead of X
cursors).

Refactor the code for cursor handling. Prefer loading cursors by name.

Do not load actual cursors when loading the theme. Find the files and remember
the arguments/calls for loading them instead. Keeping HCURSOR instance in the
hashmap would result in multiple GdkCursors using the same HCURSOR. Given that
we use DestroyCursor() to off them, this would cause problems (at the very
least - DestroyCursor() would fail).

Store GdkCursor instances in a cache. Update cached cursors when theme changes.

Recognize "system" theme as a special (and default) case. When it is set,
prefer system cursors and fall back to Adwaita cursors and (as a last resort)
built-in X cursors. Otherwise prefer theme cursors and fall back to system and
X cursors.

Force GTK to use "left_ptr" cursor when no cursor is set. Using NULL makes
it use the system default "arrow", which is not the intended behaviour when
a non-system theme is selected.

Ignore cursor size setting and query the OS for the required cursor size, as
Windows (almost) does not allow setting cursors of arbitrary size.

https://bugzilla.gnome.org/show_bug.cgi?id=749287
2015-05-20 08:42:24 +00:00

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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 "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 },
{ "ns-resize", IDC_SIZENS },
{ "nesw-resize", IDC_SIZENESW },
{ "nwse-resize", IDC_SIZENWSE }
};
static HCURSOR
hcursor_from_x_cursor (gint i,
GdkCursorType cursor_type)
{
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 (cursor_type != GDK_BLANK_CURSOR)
{
#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)
{
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,
cursor->cursor_type);
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,
GdkCursorType cursor_type)
{
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;
result->cursor_type = cursor_type;
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_strconcat (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,
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_strconcat (dirs[i], "/icons/", name, "/cursors", NULL);
win32_cursor_theme_load_from (theme, size, theme_dir);
g_free (theme_dir);
}
/* ~/.icons */
theme_dir = g_strconcat (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].type);
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,
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,
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 HCURSOR
hcursor_from_type (GdkCursorType cursor_type)
{
gint i = 0;
if (cursor_type != GDK_BLANK_CURSOR)
{
for (i = 0; i < G_N_ELEMENTS (cursors); i++)
if (cursors[i].type == cursor_type)
break;
if (i >= G_N_ELEMENTS (cursors) || !cursors[i].name)
return NULL;
/* Use real Win32 cursor if possible */
if (cursors[i].builtin)
return LoadImageA (NULL, cursors[i].builtin, IMAGE_CURSOR, 0, 0,
LR_SHARED | LR_DEFAULTSIZE);
}
return hcursor_from_x_cursor (i, cursor_type);
}
struct _GdkWin32CursorClass
{
GdkCursorClass cursor_class;
};
G_DEFINE_TYPE (GdkWin32Cursor, gdk_win32_cursor, GDK_TYPE_CURSOR)
static void
_gdk_win32_cursor_finalize (GObject *object)
{
GdkWin32Cursor *private = GDK_WIN32_CURSOR (object);
if (GetCursor () == private->hcursor)
SetCursor (NULL);
if (!DestroyCursor (private->hcursor))
g_warning (G_STRLOC ": DestroyCursor (%p) failed: %lu", private->hcursor, GetLastError ());
g_free (private->name);
G_OBJECT_CLASS (gdk_win32_cursor_parent_class)->finalize (object);
}
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, cursors[i].type);
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);
}
static HCURSOR
hcursor_from_name (GdkDisplay *display,
const gchar *name)
{
HCURSOR hcursor;
if (strcmp (name, "none") == 0)
return hcursor_from_type (GDK_BLANK_CURSOR);
/* 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;
}
static GdkCursor*
cursor_new_from_hcursor (HCURSOR hcursor,
const gchar *name,
GdkCursorType cursor_type)
{
GdkWin32Cursor *private;
GdkCursor *cursor;
private = g_object_new (GDK_TYPE_WIN32_CURSOR,
"cursor-type", cursor_type,
"display", _gdk_display,
NULL);
private->name = g_strdup (name);
private->hcursor = hcursor;
cursor = (GdkCursor*) private;
return cursor;
}
static gboolean
_gdk_win32_cursor_update (GdkWin32Display *win32_display,
GdkWin32Cursor *cursor)
{
HCURSOR hcursor = NULL;
Win32CursorTheme *theme;
Win32Cursor *theme_cursor;
/* Do nothing if this is not a named cursor. */
if (cursor->name == NULL)
return FALSE;
theme = _gdk_win32_display_get_cursor_theme (win32_display);
theme_cursor = win32_cursor_theme_get_cursor (theme, cursor->name);
if (theme_cursor != NULL)
hcursor = win32_cursor_create_hcursor (theme_cursor);
if (hcursor == NULL)
{
g_warning (G_STRLOC ": Unable to load %s from the cursor theme", cursor->name);
hcursor = hcursor_idc_from_name (cursor->name);
if (hcursor == NULL)
hcursor = hcursor_x_from_name (cursor->name);
if (hcursor == NULL)
return FALSE;
}
if (GetCursor () == cursor->hcursor)
SetCursor (hcursor);
if (!DestroyCursor (cursor->hcursor))
g_warning (G_STRLOC ": DestroyCursor (%p) failed: %lu", cursor->hcursor, GetLastError ());
cursor->hcursor = hcursor;
return TRUE;
}
void
_gdk_win32_display_update_cursors (GdkWin32Display *display)
{
GHashTableIter iter;
const char *name;
GdkWin32Cursor *cursor;
g_hash_table_iter_init (&iter, display->cursor_cache);
while (g_hash_table_iter_next (&iter, (gpointer *) &name, (gpointer *) &cursor))
_gdk_win32_cursor_update (display, cursor);
}
void
_gdk_win32_display_init_cursors (GdkWin32Display *display)
{
display->cursor_cache = g_hash_table_new_full (g_str_hash,
g_str_equal,
NULL,
g_object_unref);
display->cursor_theme_name = g_strdup ("system");
}
void
_gdk_win32_display_finalize_cursors (GdkWin32Display *display)
{
g_free (display->cursor_theme_name);
if (display->cursor_theme)
win32_cursor_theme_destroy (display->cursor_theme);
g_hash_table_destroy (display->cursor_cache);
}
GdkCursor*
_gdk_win32_display_get_cursor_for_type (GdkDisplay *display,
GdkCursorType cursor_type)
{
GEnumClass *enum_class;
GEnumValue *enum_value;
gchar *cursor_name;
HCURSOR hcursor;
GdkCursor *result;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
enum_class = g_type_class_ref (GDK_TYPE_CURSOR_TYPE);
enum_value = g_enum_get_value (enum_class, cursor_type);
cursor_name = g_strdup (enum_value->value_nick);
g_strdelimit (cursor_name, "-", '_');
g_type_class_unref (enum_class);
result = g_hash_table_lookup (win32_display->cursor_cache, cursor_name);
if (result)
{
g_free (cursor_name);
return g_object_ref (result);
}
hcursor = hcursor_from_name (display, cursor_name);
if (hcursor == NULL)
hcursor = hcursor_from_type (cursor_type);
if (hcursor == NULL)
g_warning ("gdk_cursor_new_for_display: no cursor %d found", cursor_type);
else
GDK_NOTE (CURSOR, g_print ("gdk_cursor_new_for_display: %d: %p\n",
cursor_type, hcursor));
result = cursor_new_from_hcursor (hcursor, cursor_name, cursor_type);
if (result == NULL)
return result;
/* Blank cursor case */
if (cursor_type == GDK_BLANK_CURSOR ||
!cursor_name ||
g_str_equal (cursor_name, "none") ||
g_str_equal (cursor_name, "blank_cursor"))
{
g_free (cursor_name);
return result;
}
g_hash_table_insert (win32_display->cursor_cache,
cursor_name,
g_object_ref (result));
return result;
}
GdkCursor*
_gdk_win32_display_get_cursor_for_name (GdkDisplay *display,
const gchar *name)
{
HCURSOR hcursor = NULL;
GdkCursor *result;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
result = g_hash_table_lookup (win32_display->cursor_cache, name);
if (result)
return g_object_ref (result);
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;
result = cursor_new_from_hcursor (hcursor, name, GDK_X_CURSOR);
/* Blank cursor case */
if (!name ||
g_str_equal (name, "none") ||
g_str_equal (name, "blank_cursor"))
return result;
g_hash_table_insert (win32_display->cursor_cache,
g_strdup (name),
g_object_ref (result));
return result;
}
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;
}
static cairo_surface_t *
_gdk_win32_cursor_get_surface (GdkCursor *cursor,
gdouble *x_hot,
gdouble *y_hot)
{
GdkPixbuf *pixbuf;
cairo_surface_t *surface;
g_return_val_if_fail (cursor != NULL, NULL);
pixbuf = gdk_win32_icon_to_pixbuf_libgtk_only (((GdkWin32Cursor *) cursor)->hcursor, x_hot, y_hot);
if (pixbuf == NULL)
return NULL;
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, 1, NULL);
g_object_unref (pixbuf);
return surface;
}
GdkCursor *
_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 (display == _gdk_display, NULL);
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);
if (!hcursor)
return NULL;
return cursor_new_from_hcursor (hcursor, NULL, GDK_CURSOR_IS_PIXMAP);
}
gboolean
_gdk_win32_display_supports_cursor_alpha (GdkDisplay *display)
{
g_return_val_if_fail (display == _gdk_display, FALSE);
return TRUE;
}
gboolean
_gdk_win32_display_supports_cursor_color (GdkDisplay *display)
{
g_return_val_if_fail (display == _gdk_display, FALSE);
return TRUE;
}
void
_gdk_win32_display_get_default_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
g_return_if_fail (display == _gdk_display);
/* 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)
{
g_return_if_fail (display == _gdk_display);
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_pixbuf_to_hicon (GdkPixbuf *pixbuf)
{
return pixbuf_to_hicon (pixbuf, TRUE, 0, 0);
}
HICON
_gdk_win32_pixbuf_to_hcursor (GdkPixbuf *pixbuf,
gint x_hotspot,
gint y_hotspot)
{
return pixbuf_to_hicon (pixbuf, FALSE, x_hotspot, y_hotspot);
}
HICON
gdk_win32_pixbuf_to_hicon_libgtk_only (GdkPixbuf *pixbuf)
{
return _gdk_win32_pixbuf_to_hicon (pixbuf);
}
static void
gdk_win32_cursor_init (GdkWin32Cursor *cursor)
{
}
static void
gdk_win32_cursor_class_init(GdkWin32CursorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkCursorClass *cursor_class = GDK_CURSOR_CLASS (klass);
object_class->finalize = _gdk_win32_cursor_finalize;
cursor_class->get_surface = _gdk_win32_cursor_get_surface;
}
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