dlls/win32u/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 #if 0
  22 #pragma makedep unix
  23 #endif
  24
  25 #include <stdarg.h>
  26 #include <string.h>
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "ntgdi_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     struct gdi_obj_header obj;
  40     LOGBRUSH              logbrush;
  41     struct brush_pattern  pattern;
  42 } BRUSHOBJ;
  43
  44 #define NB_HATCH_STYLES  6
  45
  46 static INT BRUSH_GetObject( HGDIOBJ handle, INT count, LPVOID buffer );
  47 static BOOL BRUSH_DeleteObject( HGDIOBJ handle );
  48
  49 static const struct gdi_obj_funcs brush_funcs =
  50 {
  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, NTGDI_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 = malloc( 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 = malloc( 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     pattern->info = NULL;
  98     pattern->bits.free = NULL;
  99
 100     switch (brush->lbStyle)
 101     {
 102     case BS_SOLID:
 103     case BS_HOLLOW:
 104         return TRUE;
 105
 106     case BS_HATCHED:
 107         if (brush->lbHatch > HS_DIAGCROSS)
 108         {
 109             if (brush->lbHatch >= HS_API_MAX) return FALSE;
 110             brush->lbStyle = BS_SOLID;
 111             brush->lbHatch = 0;
 112         }
 113         return TRUE;
 114
 115     case BS_PATTERN8X8:
 116         brush->lbStyle = BS_PATTERN;
 117         /* fall through */
 118     case BS_PATTERN:
 119         brush->lbColor = 0;
 120         return copy_bitmap( pattern, (HBITMAP)brush->lbHatch );
 121
 122     case BS_DIBPATTERNPT:
 123         pattern->usage = brush->lbColor;
 124         pattern->info = copy_packed_dib( (BITMAPINFO *)brush->lbHatch, pattern->usage );
 125         if (!pattern->info) return FALSE;
 126         pattern->bits.ptr = (char *)pattern->info + get_dib_info_size( pattern->info, pattern->usage );
 127         brush->lbStyle = BS_DIBPATTERN;
 128         brush->lbColor = 0;
 129         return TRUE;
 130
 131     case BS_DIBPATTERN:
 132     case BS_DIBPATTERN8X8:
 133     case BS_MONOPATTERN:
 134     case BS_INDEXED:
 135     default:
 136         WARN( "invalid brush style %u\n", brush->lbStyle );
 137         return FALSE;
 138     }
 139 }
 140
 141 void free_brush_pattern( struct brush_pattern *pattern )
 142 {
 143     if (pattern->bits.free) pattern->bits.free( &pattern->bits );
 144     free( pattern->info );
 145 }
 146
 147 /**********************************************************************
 148  *           __wine_get_brush_bitmap_info    (win32u.@)
 149  */
 150 BOOL CDECL __wine_get_brush_bitmap_info( HBRUSH handle, BITMAPINFO *info, void *bits, UINT *usage )
 151 {
 152     BRUSHOBJ *brush;
 153     BOOL ret = FALSE;
 154
 155     if (!(brush = GDI_GetObjPtr( handle, NTGDI_OBJ_BRUSH ))) return FALSE;
 156
 157     if (brush->pattern.info)
 158     {
 159         if (info)
 160         {
 161             memcpy( info, brush->pattern.info,
 162                     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             if (info->bmiHeader.biHeight < 0)
 166                 info->bmiHeader.biHeight = -info->bmiHeader.biHeight;
 167         }
 168         if (bits)
 169         {
 170             /* always return a bottom-up DIB */
 171             if (brush->pattern.info->bmiHeader.biHeight < 0)
 172             {
 173                 unsigned int i, width_bytes, height = -brush->pattern.info->bmiHeader.biHeight;
 174                 char *dst_ptr;
 175
 176                 width_bytes = get_dib_stride( brush->pattern.info->bmiHeader.biWidth,
 177                                               brush->pattern.info->bmiHeader.biBitCount );
 178                 dst_ptr = (char *)bits + (height - 1) * width_bytes;
 179                 for (i = 0; i < height; i++, dst_ptr -= width_bytes)
 180                     memcpy( dst_ptr, (char *)brush->pattern.bits.ptr + i * width_bytes,
 181                             width_bytes );
 182             }
 183             else memcpy( bits, brush->pattern.bits.ptr,
 184                          brush->pattern.info->bmiHeader.biSizeImage );
 185         }
 186         if (usage) *usage = brush->pattern.usage;
 187         ret = TRUE;
 188     }
 189     GDI_ReleaseObj( handle );
 190     return ret;
 191 }
 192
 193
 194 HBRUSH create_brush( const LOGBRUSH *brush )
 195 {
 196     BRUSHOBJ * ptr;
 197     HBRUSH hbrush;
 198
 199     if (!(ptr = malloc( sizeof(*ptr) ))) return 0;
 200
 201     ptr->logbrush = *brush;
 202
 203     if (store_brush_pattern( &ptr->logbrush, &ptr->pattern ) &&
 204         (hbrush = alloc_gdi_handle( &ptr->obj, NTGDI_OBJ_BRUSH, &brush_funcs )))
 205     {
 206         TRACE("%p\n", hbrush);
 207         return hbrush;
 208     }
 209
 210     free_brush_pattern( &ptr->pattern );
 211     free( ptr );
 212     return 0;
 213 }
 214
 215
 216 /***********************************************************************
 217  *           NtGdiCreateHatchBrushInternal    (win32u.@)
 218  *
 219  * Create a logical brush with a hatched pattern.
 220  */
 221 HBRUSH WINAPI NtGdiCreateHatchBrushInternal( INT style, COLORREF color, BOOL pen )
 222 {
 223     LOGBRUSH logbrush;
 224
 225     TRACE( "%d %s\n", style, debugstr_color(color) );
 226
 227     logbrush.lbStyle = BS_HATCHED;
 228     logbrush.lbColor = color;
 229     logbrush.lbHatch = style;
 230
 231     return create_brush( &logbrush );
 232 }
 233
 234
 235 /***********************************************************************
 236  *           NtGdiCreatePatternBrushInternal    (win32u.@)
 237  *
 238  * Create a logical brush with a pattern from a bitmap.
 239  */
 240 HBRUSH WINAPI NtGdiCreatePatternBrushInternal( HBITMAP bitmap, BOOL pen, BOOL is_8x8 )
 241 {
 242     LOGBRUSH logbrush = { BS_PATTERN, 0, 0 };
 243
 244     TRACE( "%p\n", bitmap );
 245
 246     logbrush.lbHatch = (ULONG_PTR)bitmap;
 247     return create_brush( &logbrush );
 248 }
 249
 250
 251 /***********************************************************************
 252  *           NtGdiCreateDIBBrush    (win32u.@)
 253  *
 254  * Create a logical brush with a pattern from a DIB.
 255  */
 256 HBRUSH WINAPI NtGdiCreateDIBBrush( const void *data, UINT coloruse, UINT size,
 257                                    BOOL is_8x8, BOOL pen, const void *client )
 258 {
 259     const BITMAPINFO *info = data;
 260     LOGBRUSH logbrush;
 261
 262     if (!data)
 263         return NULL;
 264
 265     TRACE( "%p %dx%d %dbpp\n", info, (int)info->bmiHeader.biWidth,
 266            (int)info->bmiHeader.biHeight,  (int)info->bmiHeader.biBitCount );
 267
 268     logbrush.lbStyle = BS_DIBPATTERNPT;
 269     logbrush.lbColor = coloruse;
 270     logbrush.lbHatch = (ULONG_PTR)data;
 271
 272     return create_brush( &logbrush );
 273 }
 274
 275
 276 /***********************************************************************
 277  *           NtGdiCreateSolidBrush    (win32u.@)
 278  *
 279  * Create a logical brush consisting of a single colour.
 280  */
 281 HBRUSH WINAPI NtGdiCreateSolidBrush( COLORREF color, HBRUSH brush )
 282 {
 283     LOGBRUSH logbrush;
 284
 285     TRACE("%s\n", debugstr_color(color) );
 286
 287     logbrush.lbStyle = BS_SOLID;
 288     logbrush.lbColor = color;
 289     logbrush.lbHatch = 0;
 290
 291     return create_brush( &logbrush );
 292 }
 293
 294
 295 /***********************************************************************
 296  *           NtGdiSelectBrush (win32u.@)
 297  */
 298 HGDIOBJ WINAPI NtGdiSelectBrush( HDC hdc, HGDIOBJ handle )
 299 {
 300     BRUSHOBJ *brush;
 301     HGDIOBJ ret = 0;
 302     DC *dc;
 303
 304     if (!(dc = get_dc_ptr( hdc ))) return 0;
 305
 306     if ((brush = GDI_GetObjPtr( handle, NTGDI_OBJ_BRUSH )))
 307     {
 308         PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSelectBrush );
 309         struct brush_pattern *pattern = &brush->pattern;
 310
 311         if (!pattern->info) pattern = NULL;
 312
 313         GDI_inc_ref_count( handle );
 314         GDI_ReleaseObj( handle );
 315
 316         if (!physdev->funcs->pSelectBrush( physdev, handle, pattern ))
 317         {
 318             GDI_dec_ref_count( handle );
 319         }
 320         else
 321         {
 322             ret = dc->hBrush;
 323             dc->hBrush = handle;
 324             GDI_dec_ref_count( ret );
 325         }
 326     }
 327     release_dc_ptr( dc );
 328     return ret;
 329 }
 330
 331
 332 /***********************************************************************
 333  *           BRUSH_DeleteObject
 334  */
 335 static BOOL BRUSH_DeleteObject( HGDIOBJ handle )
 336 {
 337     BRUSHOBJ *brush = free_gdi_handle( handle );
 338
 339     if (!brush) return FALSE;
 340     free_brush_pattern( &brush->pattern );
 341     free( brush );
 342     return TRUE;
 343 }
 344
 345
 346 /***********************************************************************
 347  *           BRUSH_GetObject
 348  */
 349 static INT BRUSH_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
 350 {
 351     BRUSHOBJ *brush = GDI_GetObjPtr( handle, NTGDI_OBJ_BRUSH );
 352
 353     if (!brush) return 0;
 354     if (buffer)
 355     {
 356         if (count > sizeof(brush->logbrush)) count = sizeof(brush->logbrush);
 357         memcpy( buffer, &brush->logbrush, count );
 358     }
 359     else count = sizeof(brush->logbrush);
 360     GDI_ReleaseObj( handle );
 361     return count;
 362 }