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
35 static HBRUSH hbrushPattern;
36 static HBITMAP hbitmapWallPaper;
37 static SIZE bitmapSize;
38 static BOOL fTileWallPaper;
41 /*********************************************************************
42 * desktop class descriptor
44 const struct builtin_class_descr DESKTOP_builtin_class =
46 (LPCWSTR)DESKTOP_CLASS_ATOM, /* name */
47 CS_DBLCLKS, /* style */
48 WINPROC_DESKTOP, /* proc */
50 IDC_ARROW, /* cursor */
51 (HBRUSH)(COLOR_BACKGROUND+1) /* brush */
55 /***********************************************************************
58 * Load a bitmap from a file. Used by SetDeskWallPaper().
60 static HBITMAP DESKTOP_LoadBitmap( HDC hdc, const char *filename )
62 BITMAPFILEHEADER *fileHeader;
63 BITMAPINFO *bitmapInfo;
69 /* Read all the file into memory */
71 if ((file = _lopen( filename, OF_READ )) == HFILE_ERROR)
73 UINT len = GetWindowsDirectoryA( NULL, 0 );
74 if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
75 len + strlen(filename) + 2 )))
77 GetWindowsDirectoryA( buffer, len + 1 );
78 strcat( buffer, "\\" );
79 strcat( buffer, filename );
80 file = _lopen( buffer, OF_READ );
81 HeapFree( GetProcessHeap(), 0, buffer );
83 if (file == HFILE_ERROR) return 0;
84 size = _llseek( file, 0, 2 );
85 if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
90 _llseek( file, 0, 0 );
91 size = _lread( file, buffer, size );
93 fileHeader = (BITMAPFILEHEADER *)buffer;
94 bitmapInfo = (BITMAPINFO *)(buffer + sizeof(BITMAPFILEHEADER));
96 /* Check header content */
97 if ((fileHeader->bfType != 0x4d42) || (size < fileHeader->bfSize))
99 HeapFree( GetProcessHeap(), 0, buffer );
102 hbitmap = CreateDIBitmap( hdc, &bitmapInfo->bmiHeader, CBM_INIT,
103 buffer + fileHeader->bfOffBits,
104 bitmapInfo, DIB_RGB_COLORS );
105 HeapFree( GetProcessHeap(), 0, buffer );
111 /***********************************************************************
114 LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
116 if (message == WM_NCCREATE) return TRUE;
117 return 0; /* all other messages are ignored */
120 /***********************************************************************
121 * PaintDesktop (USER32.@)
124 BOOL WINAPI PaintDesktop(HDC hdc)
126 HWND hwnd = GetDesktopWindow();
128 /* check for an owning thread; otherwise don't paint anything (non-desktop mode) */
129 if (GetWindowThreadProcessId( hwnd, NULL ))
133 GetClientRect( hwnd, &rect );
135 /* Paint desktop pattern (only if wall paper does not cover everything) */
137 if (!hbitmapWallPaper ||
138 (!fTileWallPaper && ((bitmapSize.cx < rect.right) || (bitmapSize.cy < rect.bottom))))
140 HBRUSH brush = hbrushPattern;
141 if (!brush) brush = (HBRUSH)GetClassLongPtrW( hwnd, GCLP_HBRBACKGROUND );
142 /* Set colors in case pattern is a monochrome bitmap */
143 SetBkColor( hdc, RGB(0,0,0) );
144 SetTextColor( hdc, GetSysColor(COLOR_BACKGROUND) );
145 FillRect( hdc, &rect, brush );
148 /* Paint wall paper */
150 if (hbitmapWallPaper)
153 HDC hMemDC = CreateCompatibleDC( hdc );
155 SelectObject( hMemDC, hbitmapWallPaper );
159 for (y = 0; y < rect.bottom; y += bitmapSize.cy)
160 for (x = 0; x < rect.right; x += bitmapSize.cx)
161 BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
165 x = (rect.left + rect.right - bitmapSize.cx) / 2;
166 y = (rect.top + rect.bottom - bitmapSize.cy) / 2;
169 BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
177 /***********************************************************************
178 * SetDeskWallPaper (USER32.@)
180 * FIXME: is there a unicode version?
182 BOOL WINAPI SetDeskWallPaper( LPCSTR filename )
188 if (filename == (LPSTR)-1)
190 GetProfileStringA( "desktop", "WallPaper", "(None)", buffer, 256 );
194 hbitmap = DESKTOP_LoadBitmap( hdc, filename );
196 if (hbitmapWallPaper) DeleteObject( hbitmapWallPaper );
197 hbitmapWallPaper = hbitmap;
198 fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
202 GetObjectA( hbitmap, sizeof(bmp), &bmp );
203 bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
204 bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
210 /***********************************************************************
213 * Set the desktop pattern.
215 BOOL DESKTOP_SetPattern( LPCWSTR pattern )
219 if (hbrushPattern) DeleteObject( hbrushPattern );
221 memset( pat, 0, sizeof(pat) );
225 WideCharToMultiByte( CP_ACP, 0, pattern, -1, buffer, sizeof(buffer), NULL, NULL );
226 if (sscanf( buffer, " %d %d %d %d %d %d %d %d",
227 &pat[0], &pat[1], &pat[2], &pat[3],
228 &pat[4], &pat[5], &pat[6], &pat[7] ))
234 for (i = 0; i < 8; i++) pattern[i] = pat[i] & 0xffff;
235 hbitmap = CreateBitmap( 8, 8, 1, 1, pattern );
236 hbrushPattern = CreatePatternBrush( hbitmap );
237 DeleteObject( hbitmap );