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