dlls/gdi32/brush.c

   1 /*
   2  * GDI brush objects
   3  *
   4  * Copyright 1993, 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 <string.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "wine/wingdi16.h"
  30 #include "wownt32.h"
  31 #include "gdi_private.h"
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  35
  36 /* GDI logical brush object */
  37 typedef struct
  38 {
  39     GDIOBJHDR header;
  40     LOGBRUSH  logbrush;
  41 } BRUSHOBJ;
  42
  43 #define NB_HATCH_STYLES  6
  44
  45 static HGDIOBJ BRUSH_SelectObject( HGDIOBJ handle, HDC hdc );
  46 static INT BRUSH_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
  47 static INT BRUSH_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
  48 static BOOL BRUSH_DeleteObject( HGDIOBJ handle, void *obj );
  49
  50 static const struct gdi_obj_funcs brush_funcs =
  51 {
  52     BRUSH_SelectObject,  /* pSelectObject */
  53     BRUSH_GetObject16,   /* pGetObject16 */
  54     BRUSH_GetObject,     /* pGetObjectA */
  55     BRUSH_GetObject,     /* pGetObjectW */
  56     NULL,                /* pUnrealizeObject */
  57     BRUSH_DeleteObject   /* pDeleteObject */
  58 };
  59
  60 static HGLOBAL16 dib_copy(const BITMAPINFO *info, UINT coloruse)
  61 {
  62     BITMAPINFO  *newInfo;
  63     HGLOBAL16   hmem;
  64     INT         size;
  65
  66     if (info->bmiHeader.biCompression)
  67         size = info->bmiHeader.biSizeImage;
  68     else
  69         size = DIB_GetDIBImageBytes(info->bmiHeader.biWidth,
  70                                     info->bmiHeader.biHeight,
  71                                     info->bmiHeader.biBitCount);
  72     size += DIB_BitmapInfoSize( info, coloruse );
  73
  74     if (!(hmem = GlobalAlloc16( GMEM_MOVEABLE, size )))
  75     {
  76         return 0;
  77     }
  78     newInfo = (BITMAPINFO *) GlobalLock16( hmem );
  79     memcpy( newInfo, info, size );
  80     GlobalUnlock16( hmem );
  81     return hmem;
  82 }
  83
  84
  85 /***********************************************************************
  86  *           CreateBrushIndirect    (GDI32.@)
  87  *
  88  * Create a logical brush with a given style, color or pattern.
  89  *
  90  * PARAMS
  91  *  brush [I] Pointer to a LOGBRUSH structure describing the desired brush.
  92  *
  93  * RETURNS
  94  *  A handle to the created brush, or a NULL handle if the brush cannot be
  95  *  created.
  96  *
  97  * NOTES
  98  * - The brush returned should be freed by the caller using DeleteObject()
  99  *   when it is no longer required.
 100  * - Windows 95 and earlier cannot create brushes from bitmaps or DIBs larger
 101  *   than 8x8 pixels. If a larger bitmap is given, only a portion of the bitmap
 102  *   is used.
 103  */
 104 HBRUSH WINAPI CreateBrushIndirect( const LOGBRUSH * brush )
 105 {
 106     BRUSHOBJ * ptr;
 107     HBRUSH hbrush;
 108
 109     if (!(ptr = GDI_AllocObject( sizeof(BRUSHOBJ), BRUSH_MAGIC,
 110                                 (HGDIOBJ *)&hbrush, &brush_funcs ))) return 0;
 111     ptr->logbrush.lbStyle = brush->lbStyle;
 112     ptr->logbrush.lbColor = brush->lbColor;
 113     ptr->logbrush.lbHatch = brush->lbHatch;
 114
 115     switch (ptr->logbrush.lbStyle)
 116     {
 117     case BS_PATTERN8X8:
 118         ptr->logbrush.lbStyle = BS_PATTERN;
 119         /* fall through */
 120     case BS_PATTERN:
 121         ptr->logbrush.lbHatch = (ULONG_PTR)BITMAP_CopyBitmap( (HBITMAP) ptr->logbrush.lbHatch );
 122         if (!ptr->logbrush.lbHatch) goto error;
 123         break;
 124
 125     case BS_DIBPATTERNPT:
 126         ptr->logbrush.lbStyle = BS_DIBPATTERN;
 127         ptr->logbrush.lbHatch = (ULONG_PTR)dib_copy( (BITMAPINFO *) ptr->logbrush.lbHatch,
 128                                                      ptr->logbrush.lbColor);
 129         if (!ptr->logbrush.lbHatch) goto error;
 130         break;
 131
 132     case BS_DIBPATTERN8X8:
 133     case BS_DIBPATTERN:
 134        {
 135             BITMAPINFO* bmi;
 136             HGLOBAL h = (HGLOBAL)ptr->logbrush.lbHatch;
 137
 138             ptr->logbrush.lbStyle = BS_DIBPATTERN;
 139             if (!(bmi = (BITMAPINFO *)GlobalLock( h ))) goto error;
 140             ptr->logbrush.lbHatch = dib_copy( bmi, ptr->logbrush.lbColor);
 141             GlobalUnlock( h );
 142             if (!ptr->logbrush.lbHatch) goto error;
 143             break;
 144        }
 145
 146     default:
 147         if(ptr->logbrush.lbStyle > BS_MONOPATTERN) goto error;
 148         break;
 149     }
 150
 151     GDI_ReleaseObj( hbrush );
 152     TRACE("%p\n", hbrush);
 153     return hbrush;
 154
 155  error:
 156     GDI_FreeObject( hbrush, ptr );
 157     return 0;
 158 }
 159
 160
 161 /***********************************************************************
 162  *           CreateHatchBrush    (GDI32.@)
 163  *
 164  * Create a logical brush with a hatched pattern.
 165  *
 166  * PARAMS
 167  *  style [I] Direction of lines for the hatch pattern (HS_* values from "wingdi.h")
 168  *  color [I] Colour of the hatched pattern
 169  *
 170  * RETURNS
 171  *  A handle to the created brush, or a NULL handle if the brush cannot
 172  *  be created.
 173  *
 174  * NOTES
 175  * - This function uses CreateBrushIndirect() to create the brush.
 176  * - The brush returned should be freed by the caller using DeleteObject()
 177  *   when it is no longer required.
 178  */
 179 HBRUSH WINAPI CreateHatchBrush( INT style, COLORREF color )
 180 {
 181     LOGBRUSH logbrush;
 182
 183     TRACE("%d %06x\n", style, color );
 184
 185     logbrush.lbStyle = BS_HATCHED;
 186     logbrush.lbColor = color;
 187     logbrush.lbHatch = style;
 188
 189     return CreateBrushIndirect( &logbrush );
 190 }
 191
 192
 193 /***********************************************************************
 194  *           CreatePatternBrush    (GDI32.@)
 195  *
 196  * Create a logical brush with a pattern from a bitmap.
 197  *
 198  * PARAMS
 199  *  hbitmap  [I] Bitmap containing pattern for the brush
 200  *
 201  * RETURNS
 202  *  A handle to the created brush, or a NULL handle if the brush cannot
 203  *  be created.
 204  *
 205  * NOTES
 206  * - This function uses CreateBrushIndirect() to create the brush.
 207  * - The brush returned should be freed by the caller using DeleteObject()
 208  *   when it is no longer required.
 209  */
 210 HBRUSH WINAPI CreatePatternBrush( HBITMAP hbitmap )
 211 {
 212     LOGBRUSH logbrush = { BS_PATTERN, 0, 0 };
 213     TRACE("%p\n", hbitmap );
 214
 215     logbrush.lbHatch = (ULONG_PTR)hbitmap;
 216     return CreateBrushIndirect( &logbrush );
 217 }
 218
 219
 220 /***********************************************************************
 221  *           CreateDIBPatternBrush    (GDI32.@)
 222  *
 223  * Create a logical brush with a pattern from a DIB.
 224  *
 225  * PARAMS
 226  *  hbitmap  [I] Global object containing BITMAPINFO structure for the pattern
 227  *  coloruse [I] Specifies color format, if provided
 228  *
 229  * RETURNS
 230  *  A handle to the created brush, or a NULL handle if the brush cannot
 231  *  be created.
 232  *
 233  * NOTES
 234  * - This function uses CreateBrushIndirect() to create the brush.
 235  * - The brush returned should be freed by the caller using DeleteObject()
 236  *   when it is no longer required.
 237  * - This function is for compatibility only. CreateDIBPatternBrushPt() should
 238  *   be used instead.
 239  */
 240 HBRUSH WINAPI CreateDIBPatternBrush( HGLOBAL hbitmap, UINT coloruse )
 241 {
 242     LOGBRUSH logbrush;
 243
 244     TRACE("%p\n", hbitmap );
 245
 246     logbrush.lbStyle = BS_DIBPATTERN;
 247     logbrush.lbColor = coloruse;
 248
 249     logbrush.lbHatch = (ULONG_PTR)hbitmap;
 250
 251     return CreateBrushIndirect( &logbrush );
 252 }
 253
 254
 255 /***********************************************************************
 256  *           CreateDIBPatternBrushPt    (GDI32.@)
 257  *
 258  * Create a logical brush with a pattern from a DIB.
 259  *
 260  * PARAMS
 261  *  data     [I] Pointer to a BITMAPINFO structure and image data  for the pattern
 262  *  coloruse [I] Specifies color format, if provided
 263  *
 264  * RETURNS
 265  *  A handle to the created brush, or a NULL handle if the brush cannot
 266  *  be created.
 267  *
 268  * NOTES
 269  * - This function uses CreateBrushIndirect() to create the brush.
 270  * - The brush returned should be freed by the caller using DeleteObject()
 271  *   when it is no longer required.
 272  */
 273 HBRUSH WINAPI CreateDIBPatternBrushPt( const void* data, UINT coloruse )
 274 {
 275     const BITMAPINFO *info=(const BITMAPINFO*)data;
 276     LOGBRUSH logbrush;
 277
 278     if (!data)
 279         return NULL;
 280
 281     TRACE("%p %dx%d %dbpp\n", info, info->bmiHeader.biWidth,
 282           info->bmiHeader.biHeight,  info->bmiHeader.biBitCount);
 283
 284     logbrush.lbStyle = BS_DIBPATTERNPT;
 285     logbrush.lbColor = coloruse;
 286     logbrush.lbHatch = (ULONG_PTR)data;
 287
 288     return CreateBrushIndirect( &logbrush );
 289 }
 290
 291
 292 /***********************************************************************
 293  *           CreateSolidBrush    (GDI32.@)
 294  *
 295  * Create a logical brush consisting of a single colour.
 296  *
 297  * PARAMS
 298  *  color [I] Colour to make the solid brush
 299  *
 300  * RETURNS
 301  *  A handle to the newly created brush, or a NULL handle if the brush cannot
 302  *  be created.
 303  *
 304  * NOTES
 305  * - This function uses CreateBrushIndirect() to create the brush.
 306  * - The brush returned should be freed by the caller using DeleteObject()
 307  *   when it is no longer required.
 308  */
 309 HBRUSH WINAPI CreateSolidBrush( COLORREF color )
 310 {
 311     LOGBRUSH logbrush;
 312
 313     TRACE("%06x\n", color );
 314
 315     logbrush.lbStyle = BS_SOLID;
 316     logbrush.lbColor = color;
 317     logbrush.lbHatch = 0;
 318
 319     return CreateBrushIndirect( &logbrush );
 320 }
 321
 322
 323 /***********************************************************************
 324  *           SetBrushOrgEx    (GDI32.@)
 325  *
 326  * Set the brush origin for a device context.
 327  *
 328  * PARAMS
 329  *  hdc    [I] Device context to set the brush origin for
 330  *  x      [I] New x origin
 331  *  y      [I] Ney y origin
 332  *  oldorg [O] If non NULL, destination for previously set brush origin.
 333  *
 334  * RETURNS
 335  *  Success: TRUE. The origin is set to (x,y), and oldorg is updated if given.
 336  */
 337 BOOL WINAPI SetBrushOrgEx( HDC hdc, INT x, INT y, LPPOINT oldorg )
 338 {
 339     DC *dc = DC_GetDCPtr( hdc );
 340
 341     if (!dc) return FALSE;
 342     if (oldorg)
 343     {
 344         oldorg->x = dc->brushOrgX;
 345         oldorg->y = dc->brushOrgY;
 346     }
 347     dc->brushOrgX = x;
 348     dc->brushOrgY = y;
 349     DC_ReleaseDCPtr( dc );
 350     return TRUE;
 351 }
 352
 353 /***********************************************************************
 354  *           FixBrushOrgEx    (GDI32.@)
 355  *
 356  * See SetBrushOrgEx.
 357  *
 358  * NOTES
 359  *  This function is no longer documented by MSDN, but in Win95 GDI32 it
 360  *  is the same as SetBrushOrgEx().
 361  */
 362 BOOL WINAPI FixBrushOrgEx( HDC hdc, INT x, INT y, LPPOINT oldorg )
 363 {
 364     return SetBrushOrgEx(hdc,x,y,oldorg);
 365 }
 366
 367
 368 /***********************************************************************
 369  *           BRUSH_SelectObject
 370  */
 371 static HGDIOBJ BRUSH_SelectObject( HGDIOBJ handle, HDC hdc )
 372 {
 373     BRUSHOBJ *brush;
 374     HGDIOBJ ret = 0;
 375     DC *dc = get_dc_ptr( hdc );
 376
 377     if (!dc) return 0;
 378
 379     if ((brush = GDI_GetObjPtr( handle, BRUSH_MAGIC )))
 380     {
 381         if (brush->logbrush.lbStyle == BS_PATTERN)
 382             BITMAP_SetOwnerDC( (HBITMAP)brush->logbrush.lbHatch, dc );
 383
 384         if (dc->funcs->pSelectBrush) handle = dc->funcs->pSelectBrush( dc->physDev, handle );
 385         if (handle)
 386         {
 387             ret = dc->hBrush;
 388             dc->hBrush = handle;
 389             GDI_inc_ref_count( handle );
 390             GDI_dec_ref_count( ret );
 391         }
 392         GDI_ReleaseObj( handle );
 393     }
 394     release_dc_ptr( dc );
 395     return ret;
 396 }
 397
 398
 399 /***********************************************************************
 400  *           BRUSH_DeleteObject
 401  */
 402 static BOOL BRUSH_DeleteObject( HGDIOBJ handle, void *obj )
 403 {
 404     BRUSHOBJ *brush = obj;
 405
 406     switch(brush->logbrush.lbStyle)
 407     {
 408       case BS_PATTERN:
 409           DeleteObject( (HGDIOBJ)brush->logbrush.lbHatch );
 410           break;
 411       case BS_DIBPATTERN:
 412           GlobalFree16( (HGLOBAL16)brush->logbrush.lbHatch );
 413           break;
 414     }
 415     return GDI_FreeObject( handle, obj );
 416 }
 417
 418
 419 /***********************************************************************
 420  *           BRUSH_GetObject16
 421  */
 422 static INT BRUSH_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 423 {
 424     BRUSHOBJ *brush = obj;
 425     LOGBRUSH16 logbrush;
 426
 427     logbrush.lbStyle = brush->logbrush.lbStyle;
 428     logbrush.lbColor = brush->logbrush.lbColor;
 429     logbrush.lbHatch = brush->logbrush.lbHatch;
 430     if (count > sizeof(logbrush)) count = sizeof(logbrush);
 431     memcpy( buffer, &logbrush, count );
 432     return count;
 433 }
 434
 435
 436 /***********************************************************************
 437  *           BRUSH_GetObject
 438  */
 439 static INT BRUSH_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 440 {
 441     BRUSHOBJ *brush = obj;
 442
 443     if( !buffer )
 444         return sizeof(brush->logbrush);
 445
 446     if (count > sizeof(brush->logbrush)) count = sizeof(brush->logbrush);
 447     memcpy( buffer, &brush->logbrush, count );
 448     return count;
 449 }
 450
 451
 452 /***********************************************************************
 453  *           SetSolidBrush   (GDI.604)
 454  *
 455  * Change the color of a solid brush.
 456  *
 457  * PARAMS
 458  *  hBrush   [I] Brush to change the color of
 459  *  newColor [I] New color for hBrush
 460  *
 461  * RETURNS
 462  *  Success: TRUE. The color of hBrush is set to newColor.
 463  *  Failure: FALSE.
 464  *
 465  * FIXME
 466  *  This function is undocumented and untested. The implementation may
 467  *  not be correct.
 468  */
 469 BOOL16 WINAPI SetSolidBrush16(HBRUSH16 hBrush, COLORREF newColor )
 470 {
 471     BRUSHOBJ * brushPtr;
 472     BOOL16 res = FALSE;
 473
 474     TRACE("(hBrush %04x, newColor %08x)\n", hBrush, newColor);
 475     if (!(brushPtr = (BRUSHOBJ *) GDI_GetObjPtr( HBRUSH_32(hBrush), BRUSH_MAGIC )))
 476         return FALSE;
 477
 478     if (brushPtr->logbrush.lbStyle == BS_SOLID)
 479     {
 480         brushPtr->logbrush.lbColor = newColor;
 481         res = TRUE;
 482     }
 483
 484      GDI_ReleaseObj( HBRUSH_32(hBrush) );
 485      return res;
 486 }