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gtk2/gdk/win32/gdkcursor-win32.c
Tor Lillqvist bc9c5d2a9f Nitpick. Define BITMAPV5HEADERS also for w32api < 3.0, although I have 
no idea whether gdk/win32 would build with such an old beast.


svn path=/trunk/; revision=17258
2007-02-04 00:32:52 +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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#define GDK_PIXBUF_ENABLE_BACKEND /* Ugly? */
#include "gdkdisplay.h"
#include "gdkscreen.h"
#include "gdkcursor.h"
#include "gdkprivate-win32.h"
#ifdef __MINGW32__
#include <w32api.h>
#endif
#include "xcursors.h"
#if (defined(__MINGW32__) && (__W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 8))) || (defined(_MSC_VER) && (WINVER < 0x0500))
typedef struct {
DWORD bV5Size;
LONG bV5Width;
LONG bV5Height;
WORD bV5Planes;
WORD bV5BitCount;
DWORD bV5Compression;
DWORD bV5SizeImage;
LONG bV5XPelsPerMeter;
LONG bV5YPelsPerMeter;
DWORD bV5ClrUsed;
DWORD bV5ClrImportant;
DWORD bV5RedMask;
DWORD bV5GreenMask;
DWORD bV5BlueMask;
DWORD bV5AlphaMask;
DWORD bV5CSType;
CIEXYZTRIPLE bV5Endpoints;
DWORD bV5GammaRed;
DWORD bV5GammaGreen;
DWORD bV5GammaBlue;
DWORD bV5Intent;
DWORD bV5ProfileData;
DWORD bV5ProfileSize;
DWORD bV5Reserved;
} BITMAPV5HEADER;
#endif
static HCURSOR
_gdk_win32_data_to_wcursor (GdkCursorType cursor_type)
{
gint i, j, x, y, ofs;
HCURSOR rv = NULL;
gint w, h;
guchar *and_plane, *xor_plane;
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;
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);
#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);
if (rv == NULL)
WIN32_API_FAILED ("CreateCursor");
g_free (and_plane);
g_free (xor_plane);
return rv;
}
static GdkCursor*
_gdk_win32_cursor_new_from_hcursor (HCURSOR hcursor, GdkCursorType cursor_type)
{
GdkCursorPrivate *private;
GdkCursor *cursor;
private = g_new (GdkCursorPrivate, 1);
private->hcursor = hcursor;
cursor = (GdkCursor*) private;
cursor->type = cursor_type;
cursor->ref_count = 1;
return cursor;
}
GdkCursor*
gdk_cursor_new_for_display (GdkDisplay *display,
GdkCursorType cursor_type)
{
HCURSOR hcursor;
g_return_val_if_fail (display == _gdk_display, NULL);
hcursor = _gdk_win32_data_to_wcursor (cursor_type);
if (hcursor == NULL)
g_warning ("gdk_cursor_new_for_display: no cursor %d found", cursor_type);
else
GDK_NOTE (MISC, g_print ("gdk_cursor_new_for_display: %d: %p\n",
cursor_type, hcursor));
return _gdk_win32_cursor_new_from_hcursor (hcursor, cursor_type);
}
static gboolean
color_is_white (const GdkColor *color)
{
return (color->red == 0xFFFF
&& color->green == 0xFFFF
&& color->blue == 0xFFFF);
}
GdkCursor*
gdk_cursor_new_from_pixmap (GdkPixmap *source,
GdkPixmap *mask,
const GdkColor *fg,
const GdkColor *bg,
gint x,
gint y)
{
GdkPixmapImplWin32 *source_impl, *mask_impl;
guchar *source_bits, *mask_bits;
gint source_bpl, mask_bpl;
HCURSOR hcursor;
guchar *p, *q, *xor_mask, *and_mask;
gint width, height, cursor_width, cursor_height;
guchar residue;
gint ix, iy;
const gboolean bg_is_white = color_is_white (bg);
g_return_val_if_fail (GDK_IS_PIXMAP (source), NULL);
g_return_val_if_fail (GDK_IS_PIXMAP (mask), NULL);
g_return_val_if_fail (fg != NULL, NULL);
g_return_val_if_fail (bg != NULL, NULL);
source_impl = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (source)->impl);
mask_impl = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (mask)->impl);
g_return_val_if_fail (source_impl->width == mask_impl->width
&& source_impl->height == mask_impl->height,
NULL);
width = source_impl->width;
height = source_impl->height;
cursor_width = GetSystemMetrics (SM_CXCURSOR);
cursor_height = GetSystemMetrics (SM_CYCURSOR);
g_return_val_if_fail (width <= cursor_width && height <= cursor_height,
NULL);
residue = (1 << ((8-(width%8))%8)) - 1;
source_bits = source_impl->bits;
mask_bits = mask_impl->bits;
g_return_val_if_fail (GDK_PIXMAP_OBJECT (source)->depth == 1
&& GDK_PIXMAP_OBJECT (mask)->depth == 1,
NULL);
source_bpl = ((width - 1)/32 + 1)*4;
mask_bpl = ((mask_impl->width - 1)/32 + 1)*4;
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_CURSOR)
{
g_print ("gdk_cursor_new_from_pixmap: source=%p:\n",
source_impl->parent_instance.handle);
for (iy = 0; iy < height; iy++)
{
if (iy == 16)
break;
p = source_bits + iy*source_bpl;
for (ix = 0; ix < width; ix++)
{
if (ix == 79)
break;
g_print ("%c", ".X"[((*p)>>(7-(ix%8)))&1]);
if ((ix%8) == 7)
p++;
}
g_print ("\n");
}
g_print ("...mask=%p:\n", mask_impl->parent_instance.handle);
for (iy = 0; iy < height; iy++)
{
if (iy == 16)
break;
p = mask_bits + iy*source_bpl;
for (ix = 0; ix < width; ix++)
{
if (ix == 79)
break;
g_print ("%c", ".X"[((*p)>>(7-(ix%8)))&1]);
if ((ix%8) == 7)
p++;
}
g_print ("\n");
}
}
#endif
/* Such complex bit manipulation for this simple task, sigh.
* The X cursor and Windows cursor concepts are quite different.
* We assume here that we are always called with fg == black and
* bg == white, *or* the other way around. Random colours won't work.
* (Well, you will get a cursor, but not in those colours.)
*/
/* Note: The comments below refer to the case fg==black and
* bg==white, as that was what was implemented first. The fg==white
* (the "if (fg->pixel)" branches) case was added later.
*/
/* First set masked-out source bits, as all source bits matter on Windoze.
* As we invert them below, they will be clear in the final xor_mask.
*/
for (iy = 0; iy < height; iy++)
{
p = source_bits + iy*source_bpl;
q = mask_bits + iy*mask_bpl;
for (ix = 0; ix < ((width-1)/8+1); ix++)
if (bg_is_white)
*p++ |= ~(*q++);
else
*p++ &= *q++;
}
/* XOR mask is initialized to zero */
xor_mask = g_malloc0 (cursor_width/8 * cursor_height);
for (iy = 0; iy < height; iy++)
{
p = source_bits + iy*source_bpl;
q = xor_mask + iy*cursor_width/8;
for (ix = 0; ix < ((width-1)/8+1); ix++)
if (bg_is_white)
*q++ = ~(*p++);
else
*q++ = *p++;
q[-1] &= ~residue; /* Clear left-over bits */
}
/* AND mask is initialized to ones */
and_mask = g_malloc (cursor_width/8 * cursor_height);
memset (and_mask, 0xFF, cursor_width/8 * cursor_height);
for (iy = 0; iy < height; iy++)
{
p = mask_bits + iy*mask_bpl;
q = and_mask + iy*cursor_width/8;
for (ix = 0; ix < ((width-1)/8+1); ix++)
*q++ = ~(*p++);
q[-1] |= residue; /* Set left-over bits */
}
hcursor = CreateCursor (_gdk_app_hmodule, x, y, cursor_width, cursor_height,
and_mask, xor_mask);
GDK_NOTE (MISC, g_print ("gdk_cursor_new_from_pixmap: "
"%p (%dx%d) %p (%dx%d) = %p (%dx%d)\n",
GDK_PIXMAP_HBITMAP (source),
source_impl->width, source_impl->height,
GDK_PIXMAP_HBITMAP (mask),
mask_impl->width, mask_impl->height,
hcursor, cursor_width, cursor_height));
g_free (xor_mask);
g_free (and_mask);
return _gdk_win32_cursor_new_from_hcursor (hcursor, GDK_CURSOR_IS_PIXMAP);
}
/* The named cursors below are presumably not really useful, as the
* names are Win32-specific. No GTK+ application developed on Unix
* (and most cross-platform GTK+ apps are developed on Unix) is going
* to look for cursors under these Win32 names anyway.
*
* Would the following make any sense: The ms-windows theme engine
* calls some (to-be-defined private) API here in gdk/win32 to
* register the relevant cursors used by the currently active XP
* visual style under the names that libgtk uses to look for them
* ("color-picker", "dnd-ask", "dnd-copy", etc), and then when libgtk
* asks for those we return the ones registered by the ms-windows
* theme engine, if any.
*/
static struct {
char *name;
char *id;
} _default_cursors[] = {
{ "appstarting", IDC_APPSTARTING },
{ "arrow", IDC_ARROW },
{ "cross", IDC_CROSS },
#ifdef IDC_HAND
{ "hand", IDC_HAND },
#endif
{ "help", IDC_HELP },
{ "ibeam", IDC_IBEAM },
{ "sizeall", IDC_SIZEALL },
{ "sizenesw", IDC_SIZENESW },
{ "sizens", IDC_SIZENS },
{ "sizenwse", IDC_SIZENWSE },
{ "sizewe", IDC_SIZEWE },
{ "uparrow", IDC_UPARROW },
{ "wait", IDC_WAIT }
};
GdkCursor*
gdk_cursor_new_from_name (GdkDisplay *display,
const gchar *name)
{
HCURSOR hcursor = NULL;
int i;
g_return_val_if_fail (display == _gdk_display, NULL);
for (i = 0; i < G_N_ELEMENTS(_default_cursors); i++)
{
if (0 == strcmp(_default_cursors[i].name, name))
hcursor = LoadCursor (NULL, _default_cursors[i].id);
}
/* allow to load named cursor resources linked into the executable */
if (!hcursor)
hcursor = LoadCursor (_gdk_app_hmodule, name);
if (hcursor)
return _gdk_win32_cursor_new_from_hcursor (hcursor, GDK_X_CURSOR);
return NULL;
}
void
_gdk_cursor_destroy (GdkCursor *cursor)
{
GdkCursorPrivate *private;
g_return_if_fail (cursor != NULL);
private = (GdkCursorPrivate *) cursor;
GDK_NOTE (MISC, g_print ("_gdk_cursor_destroy: %p\n",
(cursor->type == GDK_CURSOR_IS_PIXMAP) ? private->hcursor : 0));
if (GetCursor () == private->hcursor)
SetCursor (NULL);
if (!DestroyCursor (private->hcursor))
WIN32_API_FAILED ("DestroyCursor");
g_free (private);
}
GdkDisplay *
gdk_cursor_get_display (GdkCursor *cursor)
{
return gdk_display_get_default ();
}
GdkPixbuf *
gdk_win32_icon_to_pixbuf_libgtk_only (HICON hicon)
{
GdkPixbuf *pixbuf = NULL;
ICONINFO ii;
struct
{
BITMAPINFOHEADER bi;
RGBQUAD colors[2];
} bmi;
HDC hdc;
gchar *pixels, *bits, buf[32];
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);
}
}
g_snprintf (buf, sizeof (buf), "%ld", ii.xHotspot);
gdk_pixbuf_set_option (pixbuf, "x_hot", buf);
g_snprintf (buf, sizeof (buf), "%ld", ii.yHotspot);
gdk_pixbuf_set_option (pixbuf, "y_hot", buf);
/* release temporary resources */
out2:
g_free (bits);
out1:
DeleteDC (hdc);
out0:
DeleteObject (ii.hbmColor);
DeleteObject (ii.hbmMask);
return pixbuf;
}
GdkPixbuf*
gdk_cursor_get_image (GdkCursor *cursor)
{
g_return_val_if_fail (cursor != NULL, NULL);
return gdk_win32_icon_to_pixbuf_libgtk_only (((GdkCursorPrivate *) cursor)->hcursor);
}
GdkCursor *
gdk_cursor_new_from_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
{
HCURSOR hcursor;
g_return_val_if_fail (display == _gdk_display, NULL);
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);
if (!hcursor)
return NULL;
return _gdk_win32_cursor_new_from_hcursor (hcursor, GDK_CURSOR_IS_PIXMAP);
}
gboolean
gdk_display_supports_cursor_alpha (GdkDisplay *display)
{
g_return_val_if_fail (display == _gdk_display, FALSE);
return _gdk_win32_pixbuf_to_hicon_supports_alpha ();
}
gboolean
gdk_display_supports_cursor_color (GdkDisplay *display)
{
g_return_val_if_fail (display == _gdk_display, FALSE);
return TRUE;
}
guint
gdk_display_get_default_cursor_size (GdkDisplay *display)
{
g_return_val_if_fail (display == _gdk_display, 0);
return MIN (GetSystemMetrics (SM_CXCURSOR), GetSystemMetrics (SM_CYCURSOR));
}
void
gdk_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_win32_pixbuf_to_hicon_supports_alpha() && 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);
}
gboolean
_gdk_win32_pixbuf_to_hicon_supports_alpha (void)
{
static gboolean is_win_xp=FALSE, is_win_xp_checked=FALSE;
if (!is_win_xp_checked)
{
OSVERSIONINFO version;
is_win_xp_checked = TRUE;
memset (&version, 0, sizeof (version));
version.dwOSVersionInfoSize = sizeof (version);
is_win_xp = GetVersionEx (&version)
&& version.dwPlatformId == VER_PLATFORM_WIN32_NT
&& (version.dwMajorVersion > 5
|| (version.dwMajorVersion == 5 && version.dwMinorVersion >= 1));
}
return is_win_xp;
}
HICON
gdk_win32_pixbuf_to_hicon_libgtk_only (GdkPixbuf *pixbuf)
{
return _gdk_win32_pixbuf_to_hicon (pixbuf);
}
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