dlls/wing.dll16/wing.c

   1 /*
   2  * WinG support
   3  *
   4  * Copyright (C) Robert Pouliot <krynos@clic.net>
   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 <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "wownt32.h"
  27 #include "wine/wingdi16.h"
  28 #include "wine/list.h"
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(wing);
  32
  33 struct dib_segptr_bits
  34 {
  35     struct list entry;
  36     HBITMAP   bmp;
  37     WORD      sel;
  38     WORD      count;
  39 };
  40
  41 static struct list dib_segptr_list = LIST_INIT( dib_segptr_list );
  42
  43 /* remove saved bits for bitmaps that no longer exist */
  44 static void cleanup_segptr_bits(void)
  45 {
  46     unsigned int i;
  47     struct dib_segptr_bits *bits, *next;
  48
  49     LIST_FOR_EACH_ENTRY_SAFE( bits, next, &dib_segptr_list, struct dib_segptr_bits, entry )
  50     {
  51         if (GetObjectType( bits->bmp ) == OBJ_BITMAP) continue;
  52         for (i = 0; i < bits->count; i++) FreeSelector16( bits->sel + (i << __AHSHIFT) );
  53         list_remove( &bits->entry );
  54         HeapFree( GetProcessHeap(), 0, bits );
  55     }
  56 }
  57
  58 static SEGPTR alloc_segptr_bits( HBITMAP bmp, void *bits32 )
  59 {
  60     DIBSECTION dib;
  61     unsigned int i, size;
  62     struct dib_segptr_bits *bits;
  63
  64     cleanup_segptr_bits();
  65
  66     if (!(bits = HeapAlloc( GetProcessHeap(), 0, sizeof(*bits) ))) return 0;
  67
  68     GetObjectW( bmp, sizeof(dib), &dib );
  69     size = dib.dsBm.bmHeight * dib.dsBm.bmWidthBytes;
  70
  71     /* calculate number of sel's needed for size with 64K steps */
  72     bits->bmp   = bmp;
  73     bits->count = (size + 0xffff) / 0x10000;
  74     bits->sel   = AllocSelectorArray16( bits->count );
  75
  76     for (i = 0; i < bits->count; i++)
  77     {
  78         SetSelectorBase(bits->sel + (i << __AHSHIFT), (DWORD)bits32 + i * 0x10000);
  79         SetSelectorLimit16(bits->sel + (i << __AHSHIFT), size - 1); /* yep, limit is correct */
  80         size -= 0x10000;
  81     }
  82     list_add_head( &dib_segptr_list, &bits->entry );
  83     return MAKESEGPTR( bits->sel, 0 );
  84 }
  85
  86 /*************************************************************************
  87  * WING {WING}
  88  *
  89  * The Windows Game dll provides a number of functions designed to allow
  90  * programmers to bypass Gdi and write directly to video memory. The intention
  91  * was to bolster the use of Windows as a gaming platform and remove the
  92  * need for Dos based games using 32 bit Dos extenders.
  93  *
  94  * This initial approach could not compete with the performance of Dos games
  95  * (such as Doom and Warcraft) at the time, and so this dll was eventually
  96  * superseded by DirectX. It should not be used by new applications, and is
  97  * provided only for compatibility with older Windows programs.
  98  */
  99
 100 typedef enum WING_DITHER_TYPE
 101 {
 102   WING_DISPERSED_4x4, WING_DISPERSED_8x8, WING_CLUSTERED_4x4
 103 } WING_DITHER_TYPE;
 104
 105 /***********************************************************************
 106  *          WinGCreateDC        (WING.1001)
 107  *
 108  * Create a new WinG device context.
 109  *
 110  * PARAMS
 111  *  None.
 112  *
 113  * RETURNS
 114  *  Success: A handle to the created device context.
 115  *  Failure: A NULL handle.
 116  */
 117 HDC16 WINAPI WinGCreateDC16(void)
 118 {
 119     TRACE("(void)\n");
 120     return HDC_16( CreateCompatibleDC( 0 ));
 121 }
 122
 123 /***********************************************************************
 124  *  WinGRecommendDIBFormat    (WING.1002)
 125  *
 126  * Get the recommended format of bitmaps for the current display.
 127  *
 128  * PARAMS
 129  *  bmpi [O] Destination for format information
 130  *
 131  * RETURNS
 132  *  Success: TRUE. bmpi is filled with the best (fastest) bitmap format
 133  *  Failure: FALSE, if bmpi is NULL.
 134  */
 135 BOOL16 WINAPI WinGRecommendDIBFormat16(BITMAPINFO *bmpi)
 136 {
 137     TRACE("(%p)\n", bmpi);
 138
 139     if (!bmpi)
 140         return FALSE;
 141
 142     bmpi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 143     bmpi->bmiHeader.biWidth = 320;
 144     bmpi->bmiHeader.biHeight = -1;
 145     bmpi->bmiHeader.biPlanes = 1;
 146     bmpi->bmiHeader.biBitCount = 8;
 147     bmpi->bmiHeader.biCompression = BI_RGB;
 148     bmpi->bmiHeader.biSizeImage = 0;
 149     bmpi->bmiHeader.biXPelsPerMeter = 0;
 150     bmpi->bmiHeader.biYPelsPerMeter = 0;
 151     bmpi->bmiHeader.biClrUsed = 0;
 152     bmpi->bmiHeader.biClrImportant = 0;
 153
 154     return TRUE;
 155 }
 156
 157 /***********************************************************************
 158  *        WinGCreateBitmap    (WING.1003)
 159  *
 160  * Create a new WinG bitmap.
 161  *
 162  * PARAMS
 163  *  hdc  [I] WinG device context
 164  *  bmpi [I] Information about the bitmap
 165  *  bits [I] Location of the bitmap image data
 166  *
 167  * RETURNS
 168  *  Success: A handle to the created bitmap.
 169  *  Failure: A NULL handle.
 170  */
 171 HBITMAP16 WINAPI WinGCreateBitmap16(HDC16 hdc, BITMAPINFO *bmpi, SEGPTR *bits)
 172 {
 173     LPVOID bits32;
 174     HBITMAP hbitmap;
 175
 176     TRACE("(%d,%p,%p): create %dx%dx%d bitmap\n", hdc, bmpi, bits,
 177           bmpi->bmiHeader.biWidth, bmpi->bmiHeader.biHeight, bmpi->bmiHeader.biPlanes);
 178
 179     hbitmap = CreateDIBSection( HDC_32(hdc), bmpi, DIB_RGB_COLORS, &bits32, 0, 0 );
 180     if (hbitmap)
 181     {
 182         SEGPTR segptr = alloc_segptr_bits( hbitmap, bits32 );
 183         if (bits) *bits = segptr;
 184     }
 185     return HBITMAP_16(hbitmap);
 186 }
 187
 188 /***********************************************************************
 189  *  WinGGetDIBPointer   (WING.1004)
 190  */
 191 SEGPTR WINAPI WinGGetDIBPointer16(HBITMAP16 hWinGBitmap, BITMAPINFO* bmpi)
 192 {
 193     struct dib_segptr_bits *bits;
 194
 195     if (bmpi) FIXME( "%04x %p: setting BITMAPINFO not supported\n", hWinGBitmap, bmpi );
 196
 197     LIST_FOR_EACH_ENTRY( bits, &dib_segptr_list, struct dib_segptr_bits, entry )
 198         if (HBITMAP_16(bits->bmp) == hWinGBitmap) return MAKESEGPTR( bits->sel, 0 );
 199
 200     return 0;
 201 }
 202
 203 /***********************************************************************
 204  *  WinGSetDIBColorTable   (WING.1006)
 205  *
 206  * Set all or part of the color table for a WinG device context.
 207  *
 208  * PARAMS
 209  *  hdc    [I] WinG device context
 210  *  start  [I] Start color
 211  *  num    [I] Number of entries to set
 212  *  colors [I] Array of color data
 213  *
 214  * RETURNS
 215  *  The number of entries set.
 216  */
 217 UINT16 WINAPI WinGSetDIBColorTable16(HDC16 hdc, UINT16 start, UINT16 num, RGBQUAD *colors)
 218 {
 219     TRACE("(%d,%d,%d,%p)\n", hdc, start, num, colors);
 220     return SetDIBColorTable( HDC_32(hdc), start, num, colors );
 221 }
 222
 223 /***********************************************************************
 224  *  WinGGetDIBColorTable   (WING.1005)
 225  *
 226  * Get all or part of the color table for a WinG device context.
 227  *
 228  * PARAMS
 229  *  hdc    [I] WinG device context
 230  *  start  [I] Start color
 231  *  num    [I] Number of entries to set
 232  *  colors [O] Destination for the array of color data
 233  *
 234  * RETURNS
 235  *  The number of entries retrieved.
 236  */
 237 UINT16 WINAPI WinGGetDIBColorTable16(HDC16 hdc, UINT16 start, UINT16 num, RGBQUAD *colors)
 238 {
 239     TRACE("(%d,%d,%d,%p)\n", hdc, start, num, colors);
 240     return GetDIBColorTable( HDC_32(hdc), start, num, colors );
 241 }
 242
 243 /***********************************************************************
 244  *  WinGCreateHalfTonePalette   (WING.1007)
 245  *
 246  * Create a half tone palette.
 247  *
 248  * PARAMS
 249  *  None.
 250  *
 251  * RETURNS
 252  *  Success: A handle to the created palette.
 253  *  Failure: A NULL handle.
 254  */
 255 HPALETTE16 WINAPI WinGCreateHalfTonePalette16(void)
 256 {
 257     HDC hdc = CreateCompatibleDC(0);
 258     HPALETTE16 ret = HPALETTE_16( CreateHalftonePalette( hdc ));
 259     TRACE("(void)\n");
 260     DeleteDC( hdc );
 261     return ret;
 262 }
 263
 264 /***********************************************************************
 265  *  WinGCreateHalfToneBrush   (WING.1008)
 266  *
 267  * Create a half tone brush for a WinG device context.
 268  *
 269  * PARAMS
 270  *  winDC [I] WinG device context
 271  *  col   [I] Color
 272  *  type  [I] Desired dithering type.
 273  *
 274  * RETURNS
 275  *  Success: A handle to the created brush.
 276  *  Failure: A NULL handle.
 277  */
 278 HBRUSH16 WINAPI WinGCreateHalfToneBrush16(HDC16 winDC, COLORREF col,
 279                                             WING_DITHER_TYPE type)
 280 {
 281     TRACE("(%d,%d,%d)\n", winDC, col, type);
 282     return HBRUSH_16( CreateSolidBrush( col ));
 283 }
 284
 285 /***********************************************************************
 286  *  WinGStretchBlt   (WING.1009)
 287  *
 288  * See StretchBlt16.
 289  */
 290 BOOL16 WINAPI WinGStretchBlt16(HDC16 destDC, INT16 xDest, INT16 yDest,
 291                                INT16 widDest, INT16 heiDest,
 292                                HDC16 srcDC, INT16 xSrc, INT16 ySrc,
 293                                INT16 widSrc, INT16 heiSrc)
 294 {
 295     BOOL retval;
 296     TRACE("(%d,%d,...)\n", destDC, srcDC);
 297     SetStretchBltMode( HDC_32(destDC), COLORONCOLOR );
 298     retval = StretchBlt( HDC_32(destDC), xDest, yDest, widDest, heiDest,
 299                          HDC_32(srcDC), xSrc, ySrc, widSrc, heiSrc, SRCCOPY );
 300     SetStretchBltMode( HDC_32(destDC), BLACKONWHITE );
 301     return retval;
 302 }
 303
 304 /***********************************************************************
 305  *  WinGBitBlt   (WING.1010)
 306  *
 307  * See BitBlt16.
 308  */
 309 BOOL16 WINAPI WinGBitBlt16(HDC16 destDC, INT16 xDest, INT16 yDest,
 310                            INT16 widDest, INT16 heiDest, HDC16 srcDC,
 311                            INT16 xSrc, INT16 ySrc)
 312 {
 313     TRACE("(%d,%d,...)\n", destDC, srcDC);
 314     return BitBlt( HDC_32(destDC), xDest, yDest, widDest, heiDest, HDC_32(srcDC), xSrc, ySrc, SRCCOPY );
 315 }