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 "gdi_private.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  33
  34 /* GDI logical brush object */
  35 typedef struct
  36 {
  37     LOGBRUSH              logbrush;
  38     struct brush_pattern  pattern;
  39 } BRUSHOBJ;
  40
  41 #define NB_HATCH_STYLES  6
  42
  43 static HGDIOBJ BRUSH_SelectObject( HGDIOBJ handle, HDC hdc );
  44 static INT BRUSH_GetObject( HGDIOBJ handle, INT count, LPVOID buffer );
  45 static BOOL BRUSH_DeleteObject( HGDIOBJ handle );
  46
  47 static const struct gdi_obj_funcs brush_funcs =
  48 {
  49     BRUSH_SelectObject,  /* pSelectObject */
  50     BRUSH_GetObject,     /* pGetObjectA */
  51     BRUSH_GetObject,     /* pGetObjectW */
  52     NULL,                /* pUnrealizeObject */
  53     BRUSH_DeleteObject   /* pDeleteObject */
  54 };
  55
  56
  57 static BOOL copy_bitmap( struct brush_pattern *brush, HBITMAP bitmap )
  58 {
  59     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256])];
  60     BITMAPINFO *info = (BITMAPINFO *)buffer;
  61     struct gdi_image_bits bits;
  62     struct bitblt_coords src;
  63     BITMAPOBJ *bmp = GDI_GetObjPtr( bitmap, OBJ_BITMAP );
  64
  65     if (!bmp) return FALSE;
  66
  67     src.visrect.left   = src.x = 0;
  68     src.visrect.top    = src.y = 0;
  69     src.visrect.right  = src.width = bmp->dib.dsBm.bmWidth;
  70     src.visrect.bottom = src.height = bmp->dib.dsBm.bmHeight;
  71     if (get_image_from_bitmap( bmp, info, &bits, &src )) goto done;
  72
  73     brush->bits = bits;
  74     if (!bits.free)
  75     {
  76         if (!(brush->bits.ptr = HeapAlloc( GetProcessHeap(), 0, info->bmiHeader.biSizeImage ))) goto done;
  77         memcpy( brush->bits.ptr, bits.ptr, info->bmiHeader.biSizeImage );
  78         brush->bits.free = free_heap_bits;
  79     }
  80
  81     if (!(brush->info = HeapAlloc( GetProcessHeap(), 0, get_dib_info_size( info, DIB_RGB_COLORS ))))
  82     {
  83         if (brush->bits.free) brush->bits.free( &brush->bits );
  84         goto done;
  85     }
  86     memcpy( brush->info, info, get_dib_info_size( info, DIB_RGB_COLORS ));
  87     brush->bits.is_copy = FALSE;  /* the bits can't be modified */
  88     brush->usage = DIB_RGB_COLORS;
  89
  90 done:
  91     GDI_ReleaseObj( bitmap );
  92     return brush->info != NULL;
  93 }
  94
  95 BOOL store_brush_pattern( LOGBRUSH *brush, struct brush_pattern *pattern )
  96 {
  97     HGLOBAL hmem = 0;
  98
  99     pattern->info = NULL;
 100     pattern->bits.free = NULL;
 101
 102     switch (brush->lbStyle)
 103     {
 104     case BS_SOLID:
 105     case BS_HOLLOW:
 106         return TRUE;
 107
 108     case BS_HATCHED:
 109         if (brush->lbHatch > HS_DIAGCROSS)
 110         {
 111             if (brush->lbHatch >= HS_API_MAX) return FALSE;
 112             brush->lbStyle = BS_SOLID;
 113             brush->lbHatch = 0;
 114         }
 115         return TRUE;
 116
 117     case BS_PATTERN8X8:
 118         brush->lbStyle = BS_PATTERN;
 119         /* fall through */
 120     case BS_PATTERN:
 121         brush->lbColor = 0;
 122         return copy_bitmap( pattern, (HBITMAP)brush->lbHatch );
 123
 124     case BS_DIBPATTERN:
 125         hmem = (HGLOBAL)brush->lbHatch;
 126         if (!(brush->lbHatch = (ULONG_PTR)GlobalLock( hmem ))) return FALSE;
 127         /* fall through */
 128     case BS_DIBPATTERNPT:
 129         pattern->usage = brush->lbColor;
 130         pattern->info = copy_packed_dib( (BITMAPINFO *)brush->lbHatch, pattern->usage );
 131         if (hmem) GlobalUnlock( hmem );
 132         if (!pattern->info) return FALSE;
 133         pattern->bits.ptr = (char *)pattern->info + get_dib_info_size( pattern->info, pattern->usage );
 134         brush->lbStyle = BS_DIBPATTERN;
 135         brush->lbColor = 0;
 136         return TRUE;
 137
 138     case BS_DIBPATTERN8X8:
 139     case BS_MONOPATTERN:
 140     case BS_INDEXED:
 141     default:
 142         WARN( "invalid brush style %u\n", brush->lbStyle );
 143         return FALSE;
 144     }
 145 }
 146
 147 void free_brush_pattern( struct brush_pattern *pattern )
 148 {
 149     if (pattern->bits.free) pattern->bits.free( &pattern->bits );
 150     HeapFree( GetProcessHeap(), 0, pattern->info );
 151 }
 152
 153 BOOL get_brush_bitmap_info( HBRUSH handle, BITMAPINFO *info, void **bits, UINT *usage )
 154 {
 155     BRUSHOBJ *brush;
 156     BOOL ret = FALSE;
 157
 158     if (!(brush = GDI_GetObjPtr( handle, OBJ_BRUSH ))) return FALSE;
 159
 160     if (brush->pattern.info)
 161     {
 162         memcpy( info, brush->pattern.info, get_dib_info_size( brush->pattern.info, brush->pattern.usage ));
 163         if (info->bmiHeader.biBitCount <= 8 && !info->bmiHeader.biClrUsed)
 164             fill_default_color_table( info );
 165         *bits = brush->pattern.bits.ptr;
 166         *usage = brush->pattern.usage;
 167         ret = TRUE;
 168     }
 169     GDI_ReleaseObj( handle );
 170     return ret;
 171 }
 172
 173
 174 /***********************************************************************
 175  *           CreateBrushIndirect    (GDI32.@)
 176  *
 177  * Create a logical brush with a given style, color or pattern.
 178  *
 179  * PARAMS
 180  *  brush [I] Pointer to a LOGBRUSH structure describing the desired brush.
 181  *
 182  * RETURNS
 183  *  A handle to the created brush, or a NULL handle if the brush cannot be
 184  *  created.
 185  *
 186  * NOTES
 187  * - The brush returned should be freed by the caller using DeleteObject()
 188  *   when it is no longer required.
 189  * - Windows 95 and earlier cannot create brushes from bitmaps or DIBs larger
 190  *   than 8x8 pixels. If a larger bitmap is given, only a portion of the bitmap
 191  *   is used.
 192  */
 193 HBRUSH WINAPI CreateBrushIndirect( const LOGBRUSH * brush )
 194 {
 195     BRUSHOBJ * ptr;
 196     HBRUSH hbrush;
 197
 198     if (!(ptr = HeapAlloc( GetProcessHeap(), 0, sizeof(*ptr) ))) return 0;
 199
 200     ptr->logbrush = *brush;
 201
 202     if (store_brush_pattern( &ptr->logbrush, &ptr->pattern ) &&
 203         (hbrush = alloc_gdi_handle( ptr, OBJ_BRUSH, &brush_funcs )))
 204     {
 205         TRACE("%p\n", hbrush);
 206         return hbrush;
 207     }
 208
 209     free_brush_pattern( &ptr->pattern );
 210     HeapFree( GetProcessHeap(), 0, ptr );
 211     return 0;
 212 }
 213
 214
 215 /***********************************************************************
 216  *           CreateHatchBrush    (GDI32.@)
 217  *
 218  * Create a logical brush with a hatched pattern.
 219  *
 220  * PARAMS
 221  *  style [I] Direction of lines for the hatch pattern (HS_* values from "wingdi.h")
 222  *  color [I] Colour of the hatched pattern
 223  *
 224  * RETURNS
 225  *  A handle to the created brush, or a NULL handle if the brush cannot
 226  *  be created.
 227  *
 228  * NOTES
 229  * - This function uses CreateBrushIndirect() to create the brush.
 230  * - The brush returned should be freed by the caller using DeleteObject()
 231  *   when it is no longer required.
 232  */
 233 HBRUSH WINAPI CreateHatchBrush( INT style, COLORREF color )
 234 {
 235     LOGBRUSH logbrush;
 236
 237     TRACE("%d %06x\n", style, color );
 238
 239     logbrush.lbStyle = BS_HATCHED;
 240     logbrush.lbColor = color;
 241     logbrush.lbHatch = style;
 242
 243     return CreateBrushIndirect( &logbrush );
 244 }
 245
 246
 247 /***********************************************************************
 248  *           CreatePatternBrush    (GDI32.@)
 249  *
 250  * Create a logical brush with a pattern from a bitmap.
 251  *
 252  * PARAMS
 253  *  hbitmap  [I] Bitmap containing pattern for the brush
 254  *
 255  * RETURNS
 256  *  A handle to the created brush, or a NULL handle if the brush cannot
 257  *  be created.
 258  *
 259  * NOTES
 260  * - This function uses CreateBrushIndirect() to create the brush.
 261  * - The brush returned should be freed by the caller using DeleteObject()
 262  *   when it is no longer required.
 263  */
 264 HBRUSH WINAPI CreatePatternBrush( HBITMAP hbitmap )
 265 {
 266     LOGBRUSH logbrush = { BS_PATTERN, 0, 0 };
 267     TRACE("%p\n", hbitmap );
 268
 269     logbrush.lbHatch = (ULONG_PTR)hbitmap;
 270     return CreateBrushIndirect( &logbrush );
 271 }
 272
 273
 274 /***********************************************************************
 275  *           CreateDIBPatternBrush    (GDI32.@)
 276  *
 277  * Create a logical brush with a pattern from a DIB.
 278  *
 279  * PARAMS
 280  *  hbitmap  [I] Global object containing BITMAPINFO structure for the pattern
 281  *  coloruse [I] Specifies color format, if provided
 282  *
 283  * RETURNS
 284  *  A handle to the created brush, or a NULL handle if the brush cannot
 285  *  be created.
 286  *
 287  * NOTES
 288  * - This function uses CreateBrushIndirect() to create the brush.
 289  * - The brush returned should be freed by the caller using DeleteObject()
 290  *   when it is no longer required.
 291  * - This function is for compatibility only. CreateDIBPatternBrushPt() should
 292  *   be used instead.
 293  */
 294 HBRUSH WINAPI CreateDIBPatternBrush( HGLOBAL hbitmap, UINT coloruse )
 295 {
 296     LOGBRUSH logbrush;
 297
 298     TRACE("%p\n", hbitmap );
 299
 300     logbrush.lbStyle = BS_DIBPATTERN;
 301     logbrush.lbColor = coloruse;
 302
 303     logbrush.lbHatch = (ULONG_PTR)hbitmap;
 304
 305     return CreateBrushIndirect( &logbrush );
 306 }
 307
 308
 309 /***********************************************************************
 310  *           CreateDIBPatternBrushPt    (GDI32.@)
 311  *
 312  * Create a logical brush with a pattern from a DIB.
 313  *
 314  * PARAMS
 315  *  data     [I] Pointer to a BITMAPINFO structure and image data  for the pattern
 316  *  coloruse [I] Specifies color format, if provided
 317  *
 318  * RETURNS
 319  *  A handle to the created brush, or a NULL handle if the brush cannot
 320  *  be created.
 321  *
 322  * NOTES
 323  * - This function uses CreateBrushIndirect() to create the brush.
 324  * - The brush returned should be freed by the caller using DeleteObject()
 325  *   when it is no longer required.
 326  */
 327 HBRUSH WINAPI CreateDIBPatternBrushPt( const void* data, UINT coloruse )
 328 {
 329     const BITMAPINFO *info=data;
 330     LOGBRUSH logbrush;
 331
 332     if (!data)
 333         return NULL;
 334
 335     TRACE("%p %dx%d %dbpp\n", info, info->bmiHeader.biWidth,
 336           info->bmiHeader.biHeight,  info->bmiHeader.biBitCount);
 337
 338     logbrush.lbStyle = BS_DIBPATTERNPT;
 339     logbrush.lbColor = coloruse;
 340     logbrush.lbHatch = (ULONG_PTR)data;
 341
 342     return CreateBrushIndirect( &logbrush );
 343 }
 344
 345
 346 /***********************************************************************
 347  *           CreateSolidBrush    (GDI32.@)
 348  *
 349  * Create a logical brush consisting of a single colour.
 350  *
 351  * PARAMS
 352  *  color [I] Colour to make the solid brush
 353  *
 354  * RETURNS
 355  *  A handle to the newly created brush, or a NULL handle if the brush cannot
 356  *  be created.
 357  *
 358  * NOTES
 359  * - This function uses CreateBrushIndirect() to create the brush.
 360  * - The brush returned should be freed by the caller using DeleteObject()
 361  *   when it is no longer required.
 362  */
 363 HBRUSH WINAPI CreateSolidBrush( COLORREF color )
 364 {
 365     LOGBRUSH logbrush;
 366
 367     TRACE("%06x\n", color );
 368
 369     logbrush.lbStyle = BS_SOLID;
 370     logbrush.lbColor = color;
 371     logbrush.lbHatch = 0;
 372
 373     return CreateBrushIndirect( &logbrush );
 374 }
 375
 376
 377 /***********************************************************************
 378  *           SetBrushOrgEx    (GDI32.@)
 379  *
 380  * Set the brush origin for a device context.
 381  *
 382  * PARAMS
 383  *  hdc    [I] Device context to set the brush origin for
 384  *  x      [I] New x origin
 385  *  y      [I] New y origin
 386  *  oldorg [O] If non NULL, destination for previously set brush origin.
 387  *
 388  * RETURNS
 389  *  Success: TRUE. The origin is set to (x,y), and oldorg is updated if given.
 390  */
 391 BOOL WINAPI SetBrushOrgEx( HDC hdc, INT x, INT y, LPPOINT oldorg )
 392 {
 393     DC *dc = get_dc_ptr( hdc );
 394
 395     if (!dc) return FALSE;
 396     if (oldorg)
 397         *oldorg = dc->brush_org;
 398
 399     dc->brush_org.x = x;
 400     dc->brush_org.y = y;
 401     release_dc_ptr( dc );
 402     return TRUE;
 403 }
 404
 405 /***********************************************************************
 406  *           FixBrushOrgEx    (GDI32.@)
 407  *
 408  * See SetBrushOrgEx.
 409  *
 410  * NOTES
 411  *  This function is no longer documented by MSDN, but in Win95 GDI32 it
 412  *  is the same as SetBrushOrgEx().
 413  */
 414 BOOL WINAPI FixBrushOrgEx( HDC hdc, INT x, INT y, LPPOINT oldorg )
 415 {
 416     return SetBrushOrgEx(hdc,x,y,oldorg);
 417 }
 418
 419
 420 /***********************************************************************
 421  *           BRUSH_SelectObject
 422  */
 423 static HGDIOBJ BRUSH_SelectObject( HGDIOBJ handle, HDC hdc )
 424 {
 425     BRUSHOBJ *brush;
 426     HGDIOBJ ret = 0;
 427     DC *dc = get_dc_ptr( hdc );
 428
 429     if (!dc)
 430     {
 431         SetLastError( ERROR_INVALID_HANDLE );
 432         return 0;
 433     }
 434
 435     if ((brush = GDI_GetObjPtr( handle, OBJ_BRUSH )))
 436     {
 437         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSelectBrush );
 438         struct brush_pattern *pattern = &brush->pattern;
 439
 440         if (!pattern->info) pattern = NULL;
 441
 442         GDI_inc_ref_count( handle );
 443         GDI_ReleaseObj( handle );
 444
 445         if (!physdev->funcs->pSelectBrush( physdev, handle, pattern ))
 446         {
 447             GDI_dec_ref_count( handle );
 448         }
 449         else
 450         {
 451             ret = dc->hBrush;
 452             dc->hBrush = handle;
 453             GDI_dec_ref_count( ret );
 454         }
 455     }
 456     release_dc_ptr( dc );
 457     return ret;
 458 }
 459
 460
 461 /***********************************************************************
 462  *           BRUSH_DeleteObject
 463  */
 464 static BOOL BRUSH_DeleteObject( HGDIOBJ handle )
 465 {
 466     BRUSHOBJ *brush = free_gdi_handle( handle );
 467
 468     if (!brush) return FALSE;
 469     free_brush_pattern( &brush->pattern );
 470     HeapFree( GetProcessHeap(), 0, brush );
 471     return TRUE;
 472 }
 473
 474
 475 /***********************************************************************
 476  *           BRUSH_GetObject
 477  */
 478 static INT BRUSH_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
 479 {
 480     BRUSHOBJ *brush = GDI_GetObjPtr( handle, OBJ_BRUSH );
 481
 482     if (!brush) return 0;
 483     if (buffer)
 484     {
 485         if (count > sizeof(brush->logbrush)) count = sizeof(brush->logbrush);
 486         memcpy( buffer, &brush->logbrush, count );
 487     }
 488     else count = sizeof(brush->logbrush);
 489     GDI_ReleaseObj( handle );
 490     return count;
 491 }