1 /*
2 * Desktop window class.
3 *
4 * Copyright 1994 Alexandre Julliard
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include "config.h"
22
23 #include <stdarg.h>
24 #include <stdio.h>
25 #include <string.h>
26 #ifdef HAVE_UNISTD_H
27 # include <unistd.h>
28 #endif
29
30 #include "windef.h"
31 #include "winbase.h"
32 #include "wingdi.h"
33 #include "controls.h"
34 #include "wine/winuser16.h"
35
36 static HBRUSH hbrushPattern;
37 static HBITMAP hbitmapWallPaper;
38 static SIZE bitmapSize;
39 static BOOL fTileWallPaper;
40
41 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
42
43
44 /*********************************************************************
45 * desktop class descriptor
46 */
47 const struct builtin_class_descr DESKTOP_builtin_class =
48 {
49 (LPCWSTR)DESKTOP_CLASS_ATOM, /* name */
50 CS_DBLCLKS, /* style */
51 NULL, /* procA (winproc is Unicode only) */
52 DesktopWndProc, /* procW */
53 0, /* extra */
54 IDC_ARROW, /* cursor */
55 (HBRUSH)(COLOR_BACKGROUND+1) /* brush */
56 };
57
58
59 /***********************************************************************
60 * DESKTOP_LoadBitmap
61 *
62 * Load a bitmap from a file. Used by SetDeskWallPaper().
63 */
64 static HBITMAP DESKTOP_LoadBitmap( HDC hdc, const char *filename )
65 {
66 BITMAPFILEHEADER *fileHeader;
67 BITMAPINFO *bitmapInfo;
68 HBITMAP hbitmap;
69 HFILE file;
70 LPSTR buffer;
71 LONG size;
72
73 /* Read all the file into memory */
74
75 if ((file = _lopen( filename, OF_READ )) == HFILE_ERROR)
76 {
77 UINT len = GetWindowsDirectoryA( NULL, 0 );
78 if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
79 len + strlen(filename) + 2 )))
80 return 0;
81 GetWindowsDirectoryA( buffer, len + 1 );
82 strcat( buffer, "\\" );
83 strcat( buffer, filename );
84 file = _lopen( buffer, OF_READ );
85 HeapFree( GetProcessHeap(), 0, buffer );
86 }
87 if (file == HFILE_ERROR) return 0;
88 size = _llseek( file, 0, 2 );
89 if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
90 {
91 _lclose( file );
92 return 0;
93 }
94 _llseek( file, 0, 0 );
95 size = _lread( file, buffer, size );
96 _lclose( file );
97 fileHeader = (BITMAPFILEHEADER *)buffer;
98 bitmapInfo = (BITMAPINFO *)(buffer + sizeof(BITMAPFILEHEADER));
99
100 /* Check header content */
101 if ((fileHeader->bfType != 0x4d42) || (size < fileHeader->bfSize))
102 {
103 HeapFree( GetProcessHeap(), 0, buffer );
104 return 0;
105 }
106 hbitmap = CreateDIBitmap( hdc, &bitmapInfo->bmiHeader, CBM_INIT,
107 buffer + fileHeader->bfOffBits,
108 bitmapInfo, DIB_RGB_COLORS );
109 HeapFree( GetProcessHeap(), 0, buffer );
110 return hbitmap;
111 }
112
113
114
115 /***********************************************************************
116 * DesktopWndProc
117 */
118 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
119 {
120 if (message == WM_NCCREATE) return TRUE;
121 return 0; /* all other messages are ignored */
122 }
123
124 /***********************************************************************
125 * PaintDesktop (USER32.@)
126 *
127 */
128 BOOL WINAPI PaintDesktop(HDC hdc)
129 {
130 HWND hwnd = GetDesktopWindow();
131
132 /* check for an owning thread; otherwise don't paint anything (non-desktop mode) */
133 if (GetWindowThreadProcessId( hwnd, NULL ))
134 {
135 RECT rect;
136
137 GetClientRect( hwnd, &rect );
138
139 /* Paint desktop pattern (only if wall paper does not cover everything) */
140
141 if (!hbitmapWallPaper ||
142 (!fTileWallPaper && ((bitmapSize.cx < rect.right) || (bitmapSize.cy < rect.bottom))))
143 {
144 HBRUSH brush = hbrushPattern;
145 if (!brush) brush = (HBRUSH)GetClassLongPtrW( hwnd, GCLP_HBRBACKGROUND );
146 /* Set colors in case pattern is a monochrome bitmap */
147 SetBkColor( hdc, RGB(0,0,0) );
148 SetTextColor( hdc, GetSysColor(COLOR_BACKGROUND) );
149 FillRect( hdc, &rect, brush );
150 }
151
152 /* Paint wall paper */
153
154 if (hbitmapWallPaper)
155 {
156 INT x, y;
157 HDC hMemDC = CreateCompatibleDC( hdc );
158
159 SelectObject( hMemDC, hbitmapWallPaper );
160
161 if (fTileWallPaper)
162 {
163 for (y = 0; y < rect.bottom; y += bitmapSize.cy)
164 for (x = 0; x < rect.right; x += bitmapSize.cx)
165 BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
166 }
167 else
168 {
169 x = (rect.left + rect.right - bitmapSize.cx) / 2;
170 y = (rect.top + rect.bottom - bitmapSize.cy) / 2;
171 if (x < 0) x = 0;
172 if (y < 0) y = 0;
173 BitBlt( hdc, x, y, bitmapSize.cx, bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
174 }
175 DeleteDC( hMemDC );
176 }
177 }
178 return TRUE;
179 }
180
181 /***********************************************************************
182 * SetDeskWallPaper (USER32.@)
183 *
184 * FIXME: is there a unicode version?
185 */
186 BOOL WINAPI SetDeskWallPaper( LPCSTR filename )
187 {
188 HBITMAP hbitmap;
189 HDC hdc;
190 char buffer[256];
191
192 if (filename == (LPSTR)-1)
193 {
194 GetProfileStringA( "desktop", "WallPaper", "(None)", buffer, 256 );
195 filename = buffer;
196 }
197 hdc = GetDC( 0 );
198 hbitmap = DESKTOP_LoadBitmap( hdc, filename );
199 ReleaseDC( 0, hdc );
200 if (hbitmapWallPaper) DeleteObject( hbitmapWallPaper );
201 hbitmapWallPaper = hbitmap;
202 fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
203 if (hbitmap)
204 {
205 BITMAP bmp;
206 GetObjectA( hbitmap, sizeof(bmp), &bmp );
207 bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
208 bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
209 }
210 return TRUE;
211 }
212
213
214 /***********************************************************************
215 * DESKTOP_SetPattern
216 *
217 * Set the desktop pattern.
218 */
219 BOOL DESKTOP_SetPattern( LPCWSTR pattern )
220 {
221 int pat[8];
222
223 if (hbrushPattern) DeleteObject( hbrushPattern );
224 hbrushPattern = 0;
225 memset( pat, 0, sizeof(pat) );
226 if (pattern)
227 {
228 char buffer[64];
229 WideCharToMultiByte( CP_ACP, 0, pattern, -1, buffer, sizeof(buffer), NULL, NULL );
230 if (sscanf( buffer, " %d %d %d %d %d %d %d %d",
231 &pat[0], &pat[1], &pat[2], &pat[3],
232 &pat[4], &pat[5], &pat[6], &pat[7] ))
233 {
234 WORD pattern[8];
235 HBITMAP hbitmap;
236 int i;
237
238 for (i = 0; i < 8; i++) pattern[i] = pat[i] & 0xffff;
239 hbitmap = CreateBitmap( 8, 8, 1, 1, (LPSTR)pattern );
240 hbrushPattern = CreatePatternBrush( hbitmap );
241 DeleteObject( hbitmap );
242 }
243 }
244 return TRUE;
245 }
246
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