src/video/wincommon/SDL_syswm.c

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FUNCTIONS

This source file includes following functions.
  1. WIN_SetWMIcon
  2. WIN_SetWMCaption
  3. WIN_IconifyWindow
  4. WIN_GrabInput
  5. WIN_GetWMInfo

   1 /*
   2     SDL - Simple DirectMedia Layer
   3     Copyright (C) 1997, 1998, 1999  Sam Lantinga
   4 
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9 
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Library General Public License for more details.
  14 
  15     You should have received a copy of the GNU Library General Public
  16     License along with this library; if not, write to the Free
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 
  19     Sam Lantinga
  20     slouken@devolution.com
  21 */
  22 
  23 #ifdef SAVE_RCSID
  24 static char rcsid =
  25  "@(#) $Id: SDL_syswm.c,v 1.4.2.8 2001/02/13 10:05:50 hercules Exp $"
  26 #endif
  27 
  28 #include <stdio.h>
  29 #include <malloc.h>
  30 #include <windows.h>
  31 
  32 #include "SDL_version.h"
  33 #include "SDL_error.h"
  34 #include "SDL_video.h"
  35 #include "SDL_syswm.h"
  36 #include "SDL_syswm_c.h"
  37 #include "SDL_pixels_c.h"
  38 
  39 #ifdef _WIN32_WCE
  40 #define DISABLE_ICON_SUPPORT
  41 #endif
  42 
  43 /*      RJR: March 28, 2000
  44         we need "SDL_cursor_c.h" for mods to WIN_GrabInput */
  45 #include "SDL_cursor_c.h"
  46 
  47 /* The screen icon -- needs to be freed on SDL_VideoQuit() */
  48 HICON   screen_icn = NULL;
  49 
  50 /* Win32 icon mask semantics are different from those of SDL:
  51      SDL applies the mask to the icon and copies result to desktop.
  52      Win32 applies the mask to the desktop and XORs the icon on.
  53    This means that the SDL mask needs to be applied to the icon and
  54    then inverted and passed to Win32.
  55 */
  56 void WIN_SetWMIcon(_THIS, SDL_Surface *icon, Uint8 *mask)
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  57 {
  58 #ifdef DISABLE_ICON_SUPPORT
  59         return;
  60 #else
  61         SDL_Palette *pal_256;
  62         SDL_Surface *icon_256;
  63         Uint8 *pdata, *pwin32;
  64         Uint8 *mdata, *mwin32, m = 0;
  65         int icon_len;
  66         int icon_plen;
  67         int icon_mlen;
  68         int icon_pitch;
  69         int mask_pitch;
  70         SDL_Rect bounds;
  71         int i, skip;
  72         int row, col;
  73         struct /* quasi-BMP format */ Win32Icon {
  74                 Uint32 biSize;
  75                 Sint32 biWidth;
  76                 Sint32 biHeight;
  77                 Uint16 biPlanes;
  78                 Uint16 biBitCount;
  79                 Uint32 biCompression;
  80                 Uint32 biSizeImage;
  81                 Sint32 biXPelsPerMeter;
  82                 Sint32 biYPelsPerMeter;
  83                 Uint32 biClrUsed;
  84                 Uint32 biClrImportant;
  85                 struct /* RGBQUAD -- note it's BGR ordered */ {
  86                         Uint8 rgbBlue;
  87                         Uint8 rgbGreen;
  88                         Uint8 rgbRed;
  89                         Uint8 rgbReserved;
  90                 } biColors[256];
  91                 /* Pixels:
  92                 Uint8 pixels[]
  93                 */
  94                 /* Mask:
  95                 Uint8 mask[]
  96                 */
  97         } *icon_win32;
  98         
  99         /* Allocate the win32 bmp icon and set everything to zero */
 100         icon_pitch = ((icon->w+3)&~3);
 101         mask_pitch = ((icon->w+7)/8);
 102         icon_plen = icon->h*icon_pitch;
 103         icon_mlen = icon->h*mask_pitch;
 104         icon_len = sizeof(*icon_win32)+icon_plen+icon_mlen;
 105         icon_win32 = (struct Win32Icon *)alloca(icon_len);
 106         if ( icon_win32 == NULL ) {
 107                 return;
 108         }
 109         memset(icon_win32, 0, icon_len);
 110 
 111         /* Set the basic BMP parameters */
 112         icon_win32->biSize = sizeof(*icon_win32)-sizeof(icon_win32->biColors);
 113         icon_win32->biWidth = icon->w;
 114         icon_win32->biHeight = icon->h*2;
 115         icon_win32->biPlanes = 1;
 116         icon_win32->biBitCount = 8;
 117         icon_win32->biSizeImage = icon_plen+icon_mlen;
 118 
 119         /* Allocate a standard 256 color icon surface */
 120         icon_256 = SDL_CreateRGBSurface(SDL_SWSURFACE, icon->w, icon->h,
 121                                          icon_win32->biBitCount, 0, 0, 0, 0);
 122         if ( icon_256 == NULL ) {
 123                 return;
 124         }
 125         pal_256 = icon_256->format->palette;
 126         if (icon->format->palette && 
 127                 (icon->format->BitsPerPixel == icon_256->format->BitsPerPixel)){
 128                 Uint8 black;
 129                 memcpy(pal_256->colors, icon->format->palette->colors,
 130                                         pal_256->ncolors*sizeof(SDL_Color));
 131                 /* Make sure that 0 is black! */
 132                 black = SDL_FindColor(pal_256, 0x00, 0x00, 0x00);
 133                 pal_256->colors[black] = pal_256->colors[0];
 134                 pal_256->colors[0].r = 0x00;
 135                 pal_256->colors[0].g = 0x00;
 136                 pal_256->colors[0].b = 0x00;
 137         } else {
 138                 SDL_DitherColors(pal_256->colors,
 139                                         icon_256->format->BitsPerPixel);
 140         }
 141 
 142         /* Now copy color data to the icon BMP */
 143         for ( i=0; i<(1<<icon_win32->biBitCount); ++i ) {
 144                 icon_win32->biColors[i].rgbRed = pal_256->colors[i].r;
 145                 icon_win32->biColors[i].rgbGreen = pal_256->colors[i].g;
 146                 icon_win32->biColors[i].rgbBlue = pal_256->colors[i].b;
 147         }
 148 
 149         /* Convert icon to a standard surface format.  This may not always
 150            be necessary, as Windows supports a variety of BMP formats, but
 151            it greatly simplifies our code.
 152         */ 
 153         bounds.x = 0;
 154         bounds.y = 0;
 155         bounds.w = icon->w;
 156         bounds.h = icon->h;
 157         if ( SDL_LowerBlit(icon, &bounds, icon_256, &bounds) < 0 ) {
 158                 SDL_FreeSurface(icon_256);
 159                 return;
 160         }
 161 
 162         /* Copy pixels upside-down to icon BMP, masked with the icon mask */
 163         if ( SDL_MUSTLOCK(icon_256) || (icon_256->pitch != icon_pitch) ) {
 164                 SDL_FreeSurface(icon_256);
 165                 SDL_SetError("Warning: Unexpected icon_256 characteristics");
 166                 return;
 167         }
 168         pdata = (Uint8 *)icon_256->pixels;
 169         mdata = mask;
 170         pwin32 = (Uint8 *)icon_win32+sizeof(*icon_win32)+icon_plen-icon_pitch;
 171         skip = icon_pitch - icon->w;
 172         for ( row=0; row<icon->h; ++row ) {
 173                 for ( col=0; col<icon->w; ++col ) {
 174                         if ( (col%8) == 0 ) {
 175                                 m = *mdata++;
 176                         }
 177                         if ( (m&0x80) != 0x00 ) {
 178                                 *pwin32 = *pdata;
 179                         }
 180                         m <<= 1;
 181                         ++pdata;
 182                         ++pwin32;
 183                 }
 184                 pdata  += skip;
 185                 pwin32 += skip;
 186                 pwin32 -= 2*icon_pitch;
 187         }
 188         SDL_FreeSurface(icon_256);
 189 
 190         /* Copy mask inverted and upside-down to icon BMP */
 191         mdata = mask;
 192         mwin32 = (Uint8 *)icon_win32
 193                         +sizeof(*icon_win32)+icon_plen+icon_mlen-mask_pitch;
 194         for ( row=0; row<icon->h; ++row ) {
 195                 for ( col=0; col<mask_pitch; ++col ) {
 196                         *mwin32++ = ~*mdata++;
 197                 }
 198                 mwin32 -= 2*mask_pitch;
 199         }
 200 
 201         /* Finally, create the icon handle and set the window icon */
 202         screen_icn = CreateIconFromResourceEx((Uint8 *)icon_win32, icon_len,
 203                         TRUE, 0x00030000, icon->w, icon->h, LR_DEFAULTCOLOR);
 204         if ( screen_icn == NULL ) {
 205                 SDL_SetError("Couldn't create Win32 icon handle");
 206         } else {
 207                 SetClassLong(SDL_Window, GCL_HICON, (LONG)screen_icn);
 208         }
 209 #endif /* DISABLE_ICON_SUPPORT */
 210 }
 211 
 212 void WIN_SetWMCaption(_THIS, const char *title, const char *icon)
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 213 {
 214 #ifdef _WIN32_WCE
 215         /* WinCE uses the UNICODE version */
 216         int nLen = strlen(title);
 217         LPWSTR lpszW = alloca((nLen+1)*2);
 218         MultiByteToWideChar(CP_ACP, 0, title, -1, lpszW, nLen);
 219         SetWindowText(SDL_Window, lpszW);
 220 #else
 221         SetWindowText(SDL_Window, title);
 222 #endif
 223 }
 224 
 225 int WIN_IconifyWindow(_THIS)
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 226 {
 227         ShowWindow(SDL_Window, SW_MINIMIZE);
 228         return(1);
 229 }
 230 
 231 SDL_GrabMode WIN_GrabInput(_THIS, SDL_GrabMode mode)
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 232 {
 233         if ( mode == SDL_GRAB_OFF ) {
 234                 ClipCursor(NULL);
 235                 if ( !(SDL_cursorstate & CURSOR_VISIBLE) ) {
 236                 /*      RJR: March 28, 2000
 237                         must be leaving relative mode, move mouse from
 238                         center of window to where it belongs ... */
 239                         POINT pt;
 240                         int x, y;
 241                         SDL_GetMouseState(&x,&y);
 242                         pt.x = x;
 243                         pt.y = y;
 244                         ClientToScreen(SDL_Window, &pt);
 245                         SetCursorPos(pt.x,pt.y);
 246                 }
 247         } else {
 248                 ClipCursor(&SDL_bounds);
 249                 if ( !(SDL_cursorstate & CURSOR_VISIBLE) ) {
 250                 /*      RJR: March 28, 2000
 251                         must be entering relative mode, get ready by
 252                         moving mouse to center of window ... */
 253                         POINT pt;
 254                         pt.x = (SDL_VideoSurface->w/2);
 255                         pt.y = (SDL_VideoSurface->h/2);
 256                         ClientToScreen(SDL_Window, &pt);
 257                         SetCursorPos(pt.x, pt.y);
 258                 }
 259         }
 260         return(mode);
 261 }
 262 
 263 /* If 'info' is the right version, this function fills it and returns 1.
 264    Otherwise, in case of a version mismatch, it returns -1.
 265 */
 266 int WIN_GetWMInfo(_THIS, SDL_SysWMinfo *info)
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 267 {
 268         if ( info->version.major <= SDL_MAJOR_VERSION ) {
 269                 info->window = SDL_Window;
 270                 return(1);
 271         } else {
 272                 SDL_SetError("Application not compiled with SDL %d.%d\n",
 273                                         SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
 274                 return(-1);
 275         }
 276 }

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