objects/brush.c

   1 /*
   2  * GDI brush objects
   3  *
   4  * Copyright 1993, 1994  Alexandre Julliard
   5  */
   6
   7 #include <stdlib.h>
   8 #include "brush.h"
   9 #include "bitmap.h"
  10 #include "metafile.h"
  11 #include "color.h"
  12 #include "stddebug.h"
  13 #include "debug.h"
  14 #include "xmalloc.h"
  15
  16 #define NB_HATCH_STYLES  6
  17
  18 static const char HatchBrushes[NB_HATCH_STYLES][8] =
  19 {
  20     { 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00 }, /* HS_HORIZONTAL */
  21     { 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08 }, /* HS_VERTICAL   */
  22     { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }, /* HS_FDIAGONAL  */
  23     { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }, /* HS_BDIAGONAL  */
  24     { 0x08, 0x08, 0x08, 0xff, 0x08, 0x08, 0x08, 0x08 }, /* HS_CROSS      */
  25     { 0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81 }  /* HS_DIAGCROSS  */
  26 };
  27
  28   /* Levels of each primary for dithering */
  29 #define PRIMARY_LEVELS  3
  30 #define TOTAL_LEVELS    (PRIMARY_LEVELS*PRIMARY_LEVELS*PRIMARY_LEVELS)
  31
  32  /* Dithering matrix size  */
  33 #define MATRIX_SIZE     8
  34 #define MATRIX_SIZE_2   (MATRIX_SIZE*MATRIX_SIZE)
  35
  36   /* Total number of possible levels for a dithered primary color */
  37 #define DITHER_LEVELS   (MATRIX_SIZE_2 * (PRIMARY_LEVELS-1) + 1)
  38
  39   /* Dithering matrix */
  40 static const int dither_matrix[MATRIX_SIZE_2] =
  41 {
  42      0, 32,  8, 40,  2, 34, 10, 42,
  43     48, 16, 56, 24, 50, 18, 58, 26,
  44     12, 44,  4, 36, 14, 46,  6, 38,
  45     60, 28, 52, 20, 62, 30, 54, 22,
  46      3, 35, 11, 43,  1, 33,  9, 41,
  47     51, 19, 59, 27, 49, 17, 57, 25,
  48     15, 47,  7, 39, 13, 45,  5, 37,
  49     63, 31, 55, 23, 61, 29, 53, 21
  50 };
  51
  52   /* Mapping between (R,G,B) triples and EGA colors */
  53 static const int EGAmapping[TOTAL_LEVELS] =
  54 {
  55     0,  /* 000000 -> 000000 */
  56     4,  /* 00007f -> 000080 */
  57     12, /* 0000ff -> 0000ff */
  58     2,  /* 007f00 -> 008000 */
  59     6,  /* 007f7f -> 008080 */
  60     6,  /* 007fff -> 008080 */
  61     10, /* 00ff00 -> 00ff00 */
  62     6,  /* 00ff7f -> 008080 */
  63     14, /* 00ffff -> 00ffff */
  64     1,  /* 7f0000 -> 800000 */
  65     5,  /* 7f007f -> 800080 */
  66     5,  /* 7f00ff -> 800080 */
  67     3,  /* 7f7f00 -> 808000 */
  68     8,  /* 7f7f7f -> 808080 */
  69     7,  /* 7f7fff -> c0c0c0 */
  70     3,  /* 7fff00 -> 808000 */
  71     7,  /* 7fff7f -> c0c0c0 */
  72     7,  /* 7fffff -> c0c0c0 */
  73     9,  /* ff0000 -> ff0000 */
  74     5,  /* ff007f -> 800080 */
  75     13, /* ff00ff -> ff00ff */
  76     3,  /* ff7f00 -> 808000 */
  77     7,  /* ff7f7f -> c0c0c0 */
  78     7,  /* ff7fff -> c0c0c0 */
  79     11, /* ffff00 -> ffff00 */
  80     7,  /* ffff7f -> c0c0c0 */
  81     15  /* ffffff -> ffffff */
  82 };
  83
  84 #define PIXEL_VALUE(r,g,b) \
  85     COLOR_mapEGAPixel[EGAmapping[((r)*PRIMARY_LEVELS+(g))*PRIMARY_LEVELS+(b)]]
  86
  87   /* X image for building dithered pixmap */
  88 static XImage *ditherImage = NULL;
  89
  90
  91 /***********************************************************************
  92  *           BRUSH_Init
  93  *
  94  * Create the X image used for dithering.
  95  */
  96 BOOL BRUSH_Init(void)
  97 {
  98     XCREATEIMAGE( ditherImage, MATRIX_SIZE, MATRIX_SIZE, screenDepth );
  99     return (ditherImage != NULL);
 100 }
 101
 102
 103 /***********************************************************************
 104  *           BRUSH_DitherColor
 105  */
 106 Pixmap BRUSH_DitherColor( DC *dc, COLORREF color )
 107 {
 108     static COLORREF prevColor = 0xffffffff;
 109     unsigned int x, y;
 110     Pixmap pixmap;
 111
 112     if (color != prevColor)
 113     {
 114         int r = GetRValue( color ) * DITHER_LEVELS;
 115         int g = GetGValue( color ) * DITHER_LEVELS;
 116         int b = GetBValue( color ) * DITHER_LEVELS;
 117         const int *pmatrix = dither_matrix;
 118
 119         for (y = 0; y < MATRIX_SIZE; y++)
 120         {
 121             for (x = 0; x < MATRIX_SIZE; x++)
 122             {
 123                 int d  = *pmatrix++ * 256;
 124                 int dr = ((r + d) / MATRIX_SIZE_2) / 256;
 125                 int dg = ((g + d) / MATRIX_SIZE_2) / 256;
 126                 int db = ((b + d) / MATRIX_SIZE_2) / 256;
 127                 XPutPixel( ditherImage, x, y, PIXEL_VALUE(dr,dg,db) );
 128             }
 129         }
 130         prevColor = color;
 131     }
 132
 133     pixmap = XCreatePixmap( display, rootWindow,
 134                             MATRIX_SIZE, MATRIX_SIZE, screenDepth );
 135     XPutImage( display, pixmap, BITMAP_colorGC, ditherImage, 0, 0,
 136                0, 0, MATRIX_SIZE, MATRIX_SIZE );
 137     return pixmap;
 138 }
 139
 140
 141 /***********************************************************************
 142  *           CreateBrushIndirect    (GDI.50)
 143  */
 144 HBRUSH CreateBrushIndirect( const LOGBRUSH16 * brush )
 145 {
 146     BRUSHOBJ * brushPtr;
 147     HBRUSH hbrush = GDI_AllocObject( sizeof(BRUSHOBJ), BRUSH_MAGIC );
 148     if (!hbrush) return 0;
 149     brushPtr = (BRUSHOBJ *) GDI_HEAP_LIN_ADDR( hbrush );
 150     memcpy( &brushPtr->logbrush, brush, sizeof(*brush) );
 151     return hbrush;
 152 }
 153
 154
 155 /***********************************************************************
 156  *           CreateHatchBrush    (GDI.58)
 157  */
 158 HBRUSH CreateHatchBrush( INT style, COLORREF color )
 159 {
 160     LOGBRUSH16 logbrush = { BS_HATCHED, color, style };
 161     dprintf_gdi(stddeb, "CreateHatchBrush: %d %06lx\n", style, color );
 162     if ((style < 0) || (style >= NB_HATCH_STYLES)) return 0;
 163     return CreateBrushIndirect( &logbrush );
 164 }
 165
 166
 167 /***********************************************************************
 168  *           CreatePatternBrush    (GDI.60)
 169  */
 170 HBRUSH CreatePatternBrush( HBITMAP hbitmap )
 171 {
 172     LOGBRUSH16 logbrush = { BS_PATTERN, 0, 0 };
 173     BITMAPOBJ *bmp, *newbmp;
 174
 175     dprintf_gdi(stddeb, "CreatePatternBrush: %04x\n", hbitmap );
 176
 177       /* Make a copy of the bitmap */
 178
 179     if (!(bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
 180         return 0;
 181     logbrush.lbHatch = (INT16)CreateBitmapIndirect16( &bmp->bitmap );
 182     newbmp = (BITMAPOBJ *) GDI_GetObjPtr( (HANDLE)logbrush.lbHatch, BITMAP_MAGIC );
 183     if (!newbmp) return 0;
 184     XCopyArea( display, bmp->pixmap, newbmp->pixmap, BITMAP_GC(bmp),
 185                0, 0, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight, 0, 0 );
 186     return CreateBrushIndirect( &logbrush );
 187 }
 188
 189
 190 /***********************************************************************
 191  *           CreateDIBPatternBrush    (GDI.445)
 192  */
 193 HBRUSH CreateDIBPatternBrush( HGLOBAL hbitmap, UINT coloruse )
 194 {
 195     LOGBRUSH16 logbrush = { BS_DIBPATTERN, coloruse, 0 };
 196     BITMAPINFO *info, *newInfo;
 197     int size;
 198
 199     dprintf_gdi(stddeb, "CreateDIBPatternBrush: %04x\n", hbitmap );
 200
 201       /* Make a copy of the bitmap */
 202
 203     if (!(info = (BITMAPINFO *) GlobalLock16( hbitmap ))) return 0;
 204
 205     if (info->bmiHeader.biCompression)
 206         size = info->bmiHeader.biSizeImage;
 207     else
 208         size = (info->bmiHeader.biWidth * info->bmiHeader.biBitCount + 31) / 32
 209                  * 8 * info->bmiHeader.biHeight;
 210     size += DIB_BitmapInfoSize( info, coloruse );
 211
 212     if (!(logbrush.lbHatch = (INT)GlobalAlloc16( GMEM_MOVEABLE, size )))
 213     {
 214         GlobalUnlock16( hbitmap );
 215         return 0;
 216     }
 217     newInfo = (BITMAPINFO *) GlobalLock16( (HANDLE)logbrush.lbHatch );
 218     memcpy( newInfo, info, size );
 219     GlobalUnlock16( (HANDLE)logbrush.lbHatch );
 220     GlobalUnlock16( hbitmap );
 221     return CreateBrushIndirect( &logbrush );
 222 }
 223
 224
 225 /***********************************************************************
 226  *           CreateSolidBrush    (GDI.66)
 227  */
 228 HBRUSH CreateSolidBrush( COLORREF color )
 229 {
 230     LOGBRUSH16 logbrush = { BS_SOLID, color, 0 };
 231     dprintf_gdi(stddeb, "CreateSolidBrush: %06lx\n", color );
 232     return CreateBrushIndirect( &logbrush );
 233 }
 234
 235
 236 /***********************************************************************
 237  *           SetBrushOrg    (GDI.148)
 238  */
 239 DWORD SetBrushOrg( HDC hdc, short x, short y )
 240 {
 241     DWORD retval;
 242     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 243     if (!dc) return FALSE;
 244     retval = dc->w.brushOrgX | (dc->w.brushOrgY << 16);
 245     dc->w.brushOrgX = x;
 246     dc->w.brushOrgY = y;
 247     return retval;
 248 }
 249
 250 /***********************************************************************
 251  *           GetSysColorBrush    (USER.281)
 252  */
 253 HBRUSH GetSysColorBrush(WORD x)
 254 {
 255         return GetStockObject(GRAY_BRUSH);
 256 }
 257
 258 /***********************************************************************
 259  *           BRUSH_DeleteObject
 260  */
 261 BOOL BRUSH_DeleteObject( HBRUSH hbrush, BRUSHOBJ * brush )
 262 {
 263     switch(brush->logbrush.lbStyle)
 264     {
 265       case BS_PATTERN:
 266           DeleteObject( (HANDLE)brush->logbrush.lbHatch );
 267           break;
 268       case BS_DIBPATTERN:
 269           GlobalFree16( (HANDLE)brush->logbrush.lbHatch );
 270           break;
 271     }
 272     return GDI_FreeObject( hbrush );
 273 }
 274
 275
 276 /***********************************************************************
 277  *           BRUSH_GetObject
 278  */
 279 int BRUSH_GetObject( BRUSHOBJ * brush, int count, LPSTR buffer )
 280 {
 281     if (count > sizeof(brush->logbrush)) count = sizeof(brush->logbrush);
 282     memcpy( buffer, &brush->logbrush, count );
 283     return count;
 284 }
 285
 286
 287 /***********************************************************************
 288  *           BRUSH_SelectSolidBrush
 289  */
 290 static void BRUSH_SelectSolidBrush( DC *dc, COLORREF color )
 291 {
 292     if ((dc->w.bitsPerPixel > 1) && (screenDepth <= 8) && !COLOR_IsSolid( color ))
 293     {
 294           /* Dithered brush */
 295         dc->u.x.brush.pixmap = BRUSH_DitherColor( dc, color );
 296         dc->u.x.brush.fillStyle = FillTiled;
 297         dc->u.x.brush.pixel = 0;
 298     }
 299     else
 300     {
 301           /* Solid brush */
 302         dc->u.x.brush.pixel = COLOR_ToPhysical( dc, color );
 303         dc->u.x.brush.fillStyle = FillSolid;
 304     }
 305 }
 306
 307
 308 /***********************************************************************
 309  *           BRUSH_SelectPatternBrush
 310  */
 311 static BOOL BRUSH_SelectPatternBrush( DC * dc, HBITMAP hbitmap )
 312 {
 313     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 314     if (!bmp) return FALSE;
 315     dc->u.x.brush.pixmap = XCreatePixmap( display, rootWindow,
 316                                           8, 8, bmp->bitmap.bmBitsPixel );
 317     XCopyArea( display, bmp->pixmap, dc->u.x.brush.pixmap,
 318                BITMAP_GC(bmp), 0, 0, 8, 8, 0, 0 );
 319
 320     if (bmp->bitmap.bmBitsPixel > 1)
 321     {
 322         dc->u.x.brush.fillStyle = FillTiled;
 323         dc->u.x.brush.pixel = 0;  /* Ignored */
 324     }
 325     else
 326     {
 327         dc->u.x.brush.fillStyle = FillOpaqueStippled;
 328         dc->u.x.brush.pixel = -1;  /* Special case (see DC_SetupGCForBrush) */
 329     }
 330     return TRUE;
 331 }
 332
 333
 334
 335 /***********************************************************************
 336  *           BRUSH_SelectObject
 337  */
 338 HBRUSH BRUSH_SelectObject( DC * dc, HBRUSH hbrush, BRUSHOBJ * brush )
 339 {
 340     HBITMAP hBitmap;
 341     BITMAPINFO * bmpInfo;
 342     HBRUSH prevHandle = dc->w.hBrush;
 343
 344     dprintf_gdi(stddeb, "Brush_SelectObject: hdc=%04x hbrush=%04x\n",
 345                 dc->hSelf,hbrush);
 346     if (dc->header.wMagic == METAFILE_DC_MAGIC)
 347     {
 348         switch (brush->logbrush.lbStyle)
 349         {
 350         case BS_SOLID:
 351         case BS_HATCHED:
 352         case BS_HOLLOW:
 353             if (!MF_CreateBrushIndirect(dc, hbrush, &(brush->logbrush)))
 354                 return (HBRUSH)0;
 355             break;
 356
 357         case BS_PATTERN:
 358         case BS_DIBPATTERN:
 359             if (!MF_CreatePatternBrush(dc, hbrush, &(brush->logbrush)))
 360                 return (HBRUSH)0;
 361             break;
 362         }
 363         return (HBRUSH)1;
 364     }
 365
 366     dc->w.hBrush = hbrush;
 367
 368     if (dc->u.x.brush.pixmap)
 369     {
 370         XFreePixmap( display, dc->u.x.brush.pixmap );
 371         dc->u.x.brush.pixmap = 0;
 372     }
 373     dc->u.x.brush.style = brush->logbrush.lbStyle;
 374
 375     switch(brush->logbrush.lbStyle)
 376     {
 377       case BS_NULL:
 378         dprintf_gdi( stddeb,"BS_NULL\n" );
 379         break;
 380
 381       case BS_SOLID:
 382         dprintf_gdi( stddeb,"BS_SOLID\n" );
 383         BRUSH_SelectSolidBrush( dc, brush->logbrush.lbColor );
 384         break;
 385
 386       case BS_HATCHED:
 387         dprintf_gdi( stddeb, "BS_HATCHED\n" );
 388         dc->u.x.brush.pixel = COLOR_ToPhysical( dc, brush->logbrush.lbColor );
 389         dc->u.x.brush.pixmap = XCreateBitmapFromData( display, rootWindow,
 390                                  HatchBrushes[brush->logbrush.lbHatch], 8, 8 );
 391         dc->u.x.brush.fillStyle = FillStippled;
 392         break;
 393
 394       case BS_PATTERN:
 395         dprintf_gdi( stddeb, "BS_PATTERN\n");
 396         BRUSH_SelectPatternBrush( dc, (HBRUSH)brush->logbrush.lbHatch );
 397         break;
 398
 399       case BS_DIBPATTERN:
 400         dprintf_gdi( stddeb, "BS_DIBPATTERN\n");
 401         if ((bmpInfo = (BITMAPINFO *) GlobalLock16( (HANDLE)brush->logbrush.lbHatch )))
 402         {
 403             int size = DIB_BitmapInfoSize( bmpInfo, brush->logbrush.lbColor );
 404             hBitmap = CreateDIBitmap( dc->hSelf, &bmpInfo->bmiHeader, CBM_INIT,
 405                                       ((char *)bmpInfo) + size, bmpInfo,
 406                                       (WORD) brush->logbrush.lbColor );
 407             BRUSH_SelectPatternBrush( dc, hBitmap );
 408             DeleteObject( hBitmap );
 409             GlobalUnlock16( (HANDLE)brush->logbrush.lbHatch );
 410         }
 411
 412         break;
 413     }
 414
 415     return prevHandle;
 416 }