2 * Desktop window class.
4 * Copyright 1994 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
36 static HBRUSH hbrushPattern;
37 static HBITMAP hbitmapWallPaper;
38 static SIZE bitmapSize;
39 static BOOL fTileWallPaper;
42 /*********************************************************************
43 * desktop class descriptor
45 const struct builtin_class_descr DESKTOP_builtin_class =
47 (LPCWSTR)DESKTOP_CLASS_ATOM, /* name */
48 CS_DBLCLKS, /* style */
49 WINPROC_DESKTOP, /* proc */
51 IDC_ARROW, /* cursor */
52 (HBRUSH)(COLOR_BACKGROUND+1) /* brush */
56 /***********************************************************************
59 static HBITMAP DESKTOP_LoadBitmap(void)
62 WCHAR filename[MAX_PATH];
64 if (!SystemParametersInfoW( SPI_GETDESKWALLPAPER, MAX_PATH, filename, 0 )) return 0;
65 if (!filename[0]) return 0;
66 hbitmap = LoadImageW( 0, filename, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE );
69 WCHAR buffer[MAX_PATH];
70 UINT len = GetWindowsDirectoryW( buffer, MAX_PATH - 2 );
71 if (buffer[len - 1] != '\\') buffer[len++] = '\\';
72 lstrcpynW( buffer + len, filename, MAX_PATH - len );
73 hbitmap = LoadImageW( 0, buffer, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE );
78 /***********************************************************************
81 static void init_wallpaper(void)
83 HBITMAP hbitmap = DESKTOP_LoadBitmap();
85 if (hbitmapWallPaper) DeleteObject( hbitmapWallPaper );
86 hbitmapWallPaper = hbitmap;
90 GetObjectA( hbitmap, sizeof(bmp), &bmp );
91 bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
92 bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
93 fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
97 /***********************************************************************
100 LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
102 if (message == WM_NCCREATE) return TRUE;
103 return 0; /* all other messages are ignored */
106 /***********************************************************************
107 * PaintDesktop (USER32.@)
110 BOOL WINAPI PaintDesktop(HDC hdc)
112 HWND hwnd = GetDesktopWindow();
114 /* check for an owning thread; otherwise don't paint anything (non-desktop mode) */
115 if (GetWindowThreadProcessId( hwnd, NULL ))
119 GetClientRect( hwnd, &rect );
121 /* Paint desktop pattern (only if wall paper does not cover everything) */
123 if (!hbitmapWallPaper ||
124 (!fTileWallPaper && ((bitmapSize.cx < rect.right) || (bitmapSize.cy < rect.bottom))))
126 HBRUSH brush = hbrushPattern;
127 if (!brush) brush = (HBRUSH)GetClassLongPtrW( hwnd, GCLP_HBRBACKGROUND );
128 /* Set colors in case pattern is a monochrome bitmap */
129 SetBkColor( hdc, RGB(0,0,0) );
130 SetTextColor( hdc, GetSysColor(COLOR_BACKGROUND) );
131 FillRect( hdc, &rect, brush );
134 /* Paint wall paper */
136 if (hbitmapWallPaper)
139 HDC hMemDC = CreateCompatibleDC( hdc );
141 SelectObject( hMemDC, hbitmapWallPaper );
145 for (y = 0; y < rect.bottom; y += bitmapSize.cy)
146 for (x = 0; x < rect.right; x += bitmapSize.cx)
147 BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
151 x = (rect.left + rect.right - bitmapSize.cx) / 2;
152 y = (rect.top + rect.bottom - bitmapSize.cy) / 2;
155 BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
163 /***********************************************************************
164 * SetDeskWallPaper (USER32.@)
166 * FIXME: is there a unicode version?
168 BOOL WINAPI SetDeskWallPaper( LPCSTR filename )
170 return SystemParametersInfoA( SPI_SETDESKWALLPAPER, MAX_PATH, (void *)filename, SPIF_UPDATEINIFILE );
174 /***********************************************************************
177 * Set the desktop pattern.
179 BOOL DESKTOP_SetPattern( LPCWSTR pattern )
183 if (hbrushPattern) DeleteObject( hbrushPattern );
185 memset( pat, 0, sizeof(pat) );
189 WideCharToMultiByte( CP_ACP, 0, pattern, -1, buffer, sizeof(buffer), NULL, NULL );
190 if (sscanf( buffer, " %d %d %d %d %d %d %d %d",
191 &pat[0], &pat[1], &pat[2], &pat[3],
192 &pat[4], &pat[5], &pat[6], &pat[7] ))
198 for (i = 0; i < 8; i++) ptrn[i] = pat[i] & 0xffff;
199 hbitmap = CreateBitmap( 8, 8, 1, 1, ptrn );
200 hbrushPattern = CreatePatternBrush( hbitmap );
201 DeleteObject( hbitmap );