dlls/gdi32/pen.c

   1 /*
   2  * GDI pen objects
   3  *
   4  * Copyright 1993 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 <stdlib.h>
  25 #include <string.h>
  26 #include <assert.h>
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "gdi_private.h"
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  35
  36   /* GDI logical pen object */
  37 typedef struct
  38 {
  39     GDIOBJHDR header;
  40     EXTLOGPEN logpen;
  41 } PENOBJ;
  42
  43
  44 static HGDIOBJ PEN_SelectObject( HGDIOBJ handle, HDC hdc );
  45 static INT PEN_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
  46
  47 static const struct gdi_obj_funcs pen_funcs =
  48 {
  49     PEN_SelectObject,  /* pSelectObject */
  50     PEN_GetObject,     /* pGetObjectA */
  51     PEN_GetObject,     /* pGetObjectW */
  52     NULL,              /* pUnrealizeObject */
  53     GDI_FreeObject     /* pDeleteObject */
  54 };
  55
  56
  57 /***********************************************************************
  58  *           CreatePen    (GDI32.@)
  59  */
  60 HPEN WINAPI CreatePen( INT style, INT width, COLORREF color )
  61 {
  62     LOGPEN logpen;
  63
  64     TRACE("%d %d %06x\n", style, width, color );
  65
  66     logpen.lopnStyle = style;
  67     logpen.lopnWidth.x = width;
  68     logpen.lopnWidth.y = 0;
  69     logpen.lopnColor = color;
  70
  71     return CreatePenIndirect( &logpen );
  72 }
  73
  74
  75 /***********************************************************************
  76  *           CreatePenIndirect    (GDI32.@)
  77  */
  78 HPEN WINAPI CreatePenIndirect( const LOGPEN * pen )
  79 {
  80     PENOBJ * penPtr;
  81     HPEN hpen;
  82
  83     if (!(penPtr = GDI_AllocObject( sizeof(PENOBJ), PEN_MAGIC, (HGDIOBJ *)&hpen,
  84                                     &pen_funcs ))) return 0;
  85     if (pen->lopnStyle == PS_USERSTYLE || pen->lopnStyle == PS_ALTERNATE)
  86         penPtr->logpen.elpPenStyle = PS_SOLID;
  87     else
  88         penPtr->logpen.elpPenStyle = pen->lopnStyle;
  89     if (pen->lopnStyle == PS_NULL)
  90     {
  91         penPtr->logpen.elpWidth = 1;
  92         penPtr->logpen.elpColor = RGB(0, 0, 0);
  93     }
  94     else
  95     {
  96         penPtr->logpen.elpWidth = abs(pen->lopnWidth.x);
  97         penPtr->logpen.elpColor = pen->lopnColor;
  98     }
  99     penPtr->logpen.elpBrushStyle = BS_SOLID;
 100     penPtr->logpen.elpHatch = 0;
 101     penPtr->logpen.elpNumEntries = 0;
 102     penPtr->logpen.elpStyleEntry[0] = 0;
 103
 104     GDI_ReleaseObj( hpen );
 105     return hpen;
 106 }
 107
 108 /***********************************************************************
 109  *           ExtCreatePen    (GDI32.@)
 110  *
 111  * FIXME: PS_USERSTYLE not handled
 112  */
 113
 114 HPEN WINAPI ExtCreatePen( DWORD style, DWORD width,
 115                               const LOGBRUSH * brush, DWORD style_count,
 116                               const DWORD *style_bits )
 117 {
 118     PENOBJ * penPtr;
 119     HPEN hpen;
 120
 121     if ((style & PS_STYLE_MASK) == PS_USERSTYLE)
 122     {
 123         if(((INT)style_count) <= 0)
 124             return 0;
 125
 126         if ((style_count > 16) || !style_bits)
 127         {
 128             SetLastError(ERROR_INVALID_PARAMETER);
 129             return 0;
 130         }
 131
 132         if ((style & PS_TYPE_MASK) == PS_COSMETIC)
 133         {
 134             /* FIXME: PS_USERSTYLE workaround */
 135             FIXME("PS_COSMETIC | PS_USERSTYLE not handled\n");
 136             style = (style & ~PS_STYLE_MASK) | PS_SOLID;
 137         }
 138         else
 139         {
 140             UINT i;
 141             BOOL has_neg = FALSE, all_zero = TRUE;
 142
 143             for(i = 0; (i < style_count) && !has_neg; i++)
 144             {
 145                 has_neg = has_neg || (((INT)(style_bits[i])) < 0);
 146                 all_zero = all_zero && (style_bits[i] == 0);
 147             }
 148
 149             if(all_zero || has_neg)
 150             {
 151                 SetLastError(ERROR_INVALID_PARAMETER);
 152                 return 0;
 153             }
 154         }
 155     }
 156     else
 157     {
 158         if (style_count || style_bits)
 159         {
 160             SetLastError(ERROR_INVALID_PARAMETER);
 161             return 0;
 162         }
 163     }
 164
 165     if ((style & PS_STYLE_MASK) == PS_NULL)
 166         return CreatePen( PS_NULL, 0, brush->lbColor );
 167
 168     if ((style & PS_TYPE_MASK) == PS_GEOMETRIC)
 169     {
 170         /* PS_ALTERNATE is applicable only for cosmetic pens */
 171         if ((style & PS_STYLE_MASK) == PS_ALTERNATE)
 172         {
 173             SetLastError(ERROR_INVALID_PARAMETER);
 174             return 0;
 175         }
 176
 177         if (brush->lbHatch && ((brush->lbStyle == BS_SOLID) || (brush->lbStyle == BS_HOLLOW)))
 178         {
 179             static int fixme_hatches_shown;
 180             if (!fixme_hatches_shown++) FIXME("Hatches not implemented\n");
 181         }
 182     }
 183     else
 184     {
 185         /* PS_INSIDEFRAME is applicable only for geometric pens */
 186         if ((style & PS_STYLE_MASK) == PS_INSIDEFRAME || width != 1)
 187         {
 188             SetLastError(ERROR_INVALID_PARAMETER);
 189             return 0;
 190         }
 191     }
 192
 193     if (!(penPtr = GDI_AllocObject( sizeof(PENOBJ) +
 194                                     style_count * sizeof(DWORD) - sizeof(penPtr->logpen.elpStyleEntry),
 195                                     EXT_PEN_MAGIC, (HGDIOBJ *)&hpen,
 196                                     &pen_funcs ))) return 0;
 197
 198     penPtr->logpen.elpPenStyle = style;
 199     penPtr->logpen.elpWidth = abs(width);
 200     penPtr->logpen.elpBrushStyle = brush->lbStyle;
 201     penPtr->logpen.elpColor = brush->lbColor;
 202     penPtr->logpen.elpHatch = brush->lbHatch;
 203     penPtr->logpen.elpNumEntries = style_count;
 204     memcpy(penPtr->logpen.elpStyleEntry, style_bits, style_count * sizeof(DWORD));
 205
 206     GDI_ReleaseObj( hpen );
 207
 208     return hpen;
 209 }
 210
 211
 212 /***********************************************************************
 213  *           PEN_SelectObject
 214  */
 215 static HGDIOBJ PEN_SelectObject( HGDIOBJ handle, HDC hdc )
 216 {
 217     HGDIOBJ ret = 0;
 218     DC *dc = get_dc_ptr( hdc );
 219
 220     if (!dc)
 221     {
 222         SetLastError( ERROR_INVALID_HANDLE );
 223         return 0;
 224     }
 225
 226     if (!GDI_inc_ref_count( handle ))
 227     {
 228         release_dc_ptr( dc );
 229         return 0;
 230     }
 231
 232     if (dc->funcs->pSelectPen && !dc->funcs->pSelectPen( dc->physDev, handle ))
 233     {
 234         GDI_dec_ref_count( handle );
 235     }
 236     else
 237     {
 238         ret = dc->hPen;
 239         dc->hPen = handle;
 240         GDI_dec_ref_count( ret );
 241     }
 242     release_dc_ptr( dc );
 243     return ret;
 244 }
 245
 246
 247 /***********************************************************************
 248  *           PEN_GetObject
 249  */
 250 static INT PEN_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 251 {
 252     PENOBJ *pen = obj;
 253
 254     switch (GDIMAGIC(pen->header.wMagic))
 255     {
 256     case PEN_MAGIC:
 257     {
 258         LOGPEN *lp;
 259
 260         if (!buffer) return sizeof(LOGPEN);
 261
 262         if (count < sizeof(LOGPEN)) return 0;
 263
 264         if ((pen->logpen.elpPenStyle & PS_STYLE_MASK) == PS_NULL &&
 265             count == sizeof(EXTLOGPEN))
 266         {
 267             EXTLOGPEN *elp = buffer;
 268             *elp = pen->logpen;
 269             elp->elpWidth = 0;
 270             return sizeof(EXTLOGPEN);
 271         }
 272
 273         lp = buffer;
 274         lp->lopnStyle = pen->logpen.elpPenStyle;
 275         lp->lopnColor = pen->logpen.elpColor;
 276         lp->lopnWidth.x = pen->logpen.elpWidth;
 277         lp->lopnWidth.y = 0;
 278         return sizeof(LOGPEN);
 279     }
 280
 281     case EXT_PEN_MAGIC:
 282     {
 283         INT size = sizeof(EXTLOGPEN) + pen->logpen.elpNumEntries * sizeof(DWORD) - sizeof(pen->logpen.elpStyleEntry);
 284
 285         if (!buffer) return size;
 286
 287         if (count < size) return 0;
 288         memcpy(buffer, &pen->logpen, size);
 289         return size;
 290     }
 291
 292     default:
 293         break;
 294     }
 295     assert(0);
 296     return 0;
 297 }