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, INT count, LPVOID buffer );
  46 static BOOL PEN_DeleteObject( HGDIOBJ handle );
  47
  48 static const struct gdi_obj_funcs pen_funcs =
  49 {
  50     PEN_SelectObject,  /* pSelectObject */
  51     PEN_GetObject,     /* pGetObjectA */
  52     PEN_GetObject,     /* pGetObjectW */
  53     NULL,              /* pUnrealizeObject */
  54     PEN_DeleteObject   /* pDeleteObject */
  55 };
  56
  57
  58 /***********************************************************************
  59  *           CreatePen    (GDI32.@)
  60  */
  61 HPEN WINAPI CreatePen( INT style, INT width, COLORREF color )
  62 {
  63     LOGPEN logpen;
  64
  65     TRACE("%d %d %06x\n", style, width, color );
  66
  67     logpen.lopnStyle = style;
  68     logpen.lopnWidth.x = width;
  69     logpen.lopnWidth.y = 0;
  70     logpen.lopnColor = color;
  71
  72     return CreatePenIndirect( &logpen );
  73 }
  74
  75
  76 /***********************************************************************
  77  *           CreatePenIndirect    (GDI32.@)
  78  */
  79 HPEN WINAPI CreatePenIndirect( const LOGPEN * pen )
  80 {
  81     PENOBJ * penPtr;
  82     HPEN hpen;
  83
  84     if (pen->lopnStyle == PS_NULL)
  85     {
  86         hpen = GetStockObject(NULL_PEN);
  87         if (hpen) return hpen;
  88     }
  89
  90     if (!(penPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(*penPtr) ))) return 0;
  91
  92     if (pen->lopnStyle == PS_USERSTYLE || pen->lopnStyle == PS_ALTERNATE)
  93         penPtr->logpen.elpPenStyle = PS_SOLID;
  94     else
  95         penPtr->logpen.elpPenStyle = pen->lopnStyle;
  96     if (pen->lopnStyle == PS_NULL)
  97     {
  98         penPtr->logpen.elpWidth = 1;
  99         penPtr->logpen.elpColor = RGB(0, 0, 0);
 100     }
 101     else
 102     {
 103         penPtr->logpen.elpWidth = abs(pen->lopnWidth.x);
 104         penPtr->logpen.elpColor = pen->lopnColor;
 105     }
 106     penPtr->logpen.elpBrushStyle = BS_SOLID;
 107     penPtr->logpen.elpHatch = 0;
 108     penPtr->logpen.elpNumEntries = 0;
 109     penPtr->logpen.elpStyleEntry[0] = 0;
 110
 111     if (!(hpen = alloc_gdi_handle( &penPtr->header, OBJ_PEN, &pen_funcs )))
 112         HeapFree( GetProcessHeap(), 0, penPtr );
 113     return hpen;
 114 }
 115
 116 /***********************************************************************
 117  *           ExtCreatePen    (GDI32.@)
 118  *
 119  * FIXME: PS_USERSTYLE not handled
 120  */
 121
 122 HPEN WINAPI ExtCreatePen( DWORD style, DWORD width,
 123                               const LOGBRUSH * brush, DWORD style_count,
 124                               const DWORD *style_bits )
 125 {
 126     PENOBJ * penPtr;
 127     HPEN hpen;
 128
 129     if ((style & PS_STYLE_MASK) == PS_USERSTYLE)
 130     {
 131         if(((INT)style_count) <= 0)
 132             return 0;
 133
 134         if ((style_count > 16) || !style_bits)
 135         {
 136             SetLastError(ERROR_INVALID_PARAMETER);
 137             return 0;
 138         }
 139
 140         if ((style & PS_TYPE_MASK) == PS_COSMETIC)
 141         {
 142             /* FIXME: PS_USERSTYLE workaround */
 143             FIXME("PS_COSMETIC | PS_USERSTYLE not handled\n");
 144             style = (style & ~PS_STYLE_MASK) | PS_SOLID;
 145         }
 146         else
 147         {
 148             UINT i;
 149             BOOL has_neg = FALSE, all_zero = TRUE;
 150
 151             for(i = 0; (i < style_count) && !has_neg; i++)
 152             {
 153                 has_neg = has_neg || (((INT)(style_bits[i])) < 0);
 154                 all_zero = all_zero && (style_bits[i] == 0);
 155             }
 156
 157             if(all_zero || has_neg)
 158             {
 159                 SetLastError(ERROR_INVALID_PARAMETER);
 160                 return 0;
 161             }
 162         }
 163     }
 164     else
 165     {
 166         if (style_count || style_bits)
 167         {
 168             SetLastError(ERROR_INVALID_PARAMETER);
 169             return 0;
 170         }
 171     }
 172
 173     if ((style & PS_STYLE_MASK) == PS_NULL)
 174         return CreatePen( PS_NULL, 0, brush->lbColor );
 175
 176     if ((style & PS_TYPE_MASK) == PS_GEOMETRIC)
 177     {
 178         /* PS_ALTERNATE is applicable only for cosmetic pens */
 179         if ((style & PS_STYLE_MASK) == PS_ALTERNATE)
 180         {
 181             SetLastError(ERROR_INVALID_PARAMETER);
 182             return 0;
 183         }
 184
 185         if (brush->lbHatch && ((brush->lbStyle == BS_SOLID) || (brush->lbStyle == BS_HOLLOW)))
 186         {
 187             static int fixme_hatches_shown;
 188             if (!fixme_hatches_shown++) FIXME("Hatches not implemented\n");
 189         }
 190     }
 191     else
 192     {
 193         /* PS_INSIDEFRAME is applicable only for geometric pens */
 194         if ((style & PS_STYLE_MASK) == PS_INSIDEFRAME || width != 1)
 195         {
 196             SetLastError(ERROR_INVALID_PARAMETER);
 197             return 0;
 198         }
 199     }
 200
 201     if (!(penPtr = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET(PENOBJ,logpen.elpStyleEntry[style_count]))))
 202         return 0;
 203
 204     penPtr->logpen.elpPenStyle = style;
 205     penPtr->logpen.elpWidth = abs(width);
 206     penPtr->logpen.elpBrushStyle = brush->lbStyle;
 207     penPtr->logpen.elpColor = brush->lbColor;
 208     penPtr->logpen.elpHatch = brush->lbHatch;
 209     penPtr->logpen.elpNumEntries = style_count;
 210     memcpy(penPtr->logpen.elpStyleEntry, style_bits, style_count * sizeof(DWORD));
 211
 212     if (!(hpen = alloc_gdi_handle( &penPtr->header, OBJ_EXTPEN, &pen_funcs )))
 213         HeapFree( GetProcessHeap(), 0, penPtr );
 214     return hpen;
 215 }
 216
 217 /***********************************************************************
 218  *           PEN_SelectObject
 219  */
 220 static HGDIOBJ PEN_SelectObject( HGDIOBJ handle, HDC hdc )
 221 {
 222     HGDIOBJ ret = 0;
 223     DC *dc = get_dc_ptr( hdc );
 224
 225     if (!dc)
 226     {
 227         SetLastError( ERROR_INVALID_HANDLE );
 228         return 0;
 229     }
 230
 231     if (!GDI_inc_ref_count( handle ))
 232     {
 233         release_dc_ptr( dc );
 234         return 0;
 235     }
 236
 237     if (dc->funcs->pSelectPen && !dc->funcs->pSelectPen( dc->physDev, handle ))
 238     {
 239         GDI_dec_ref_count( handle );
 240     }
 241     else
 242     {
 243         ret = dc->hPen;
 244         dc->hPen = handle;
 245         GDI_dec_ref_count( ret );
 246     }
 247     release_dc_ptr( dc );
 248     return ret;
 249 }
 250
 251
 252 /***********************************************************************
 253  *           PEN_DeleteObject
 254  */
 255 static BOOL PEN_DeleteObject( HGDIOBJ handle )
 256 {
 257     PENOBJ *pen = free_gdi_handle( handle );
 258
 259     if (!pen) return FALSE;
 260     return HeapFree( GetProcessHeap(), 0, pen );
 261 }
 262
 263
 264 /***********************************************************************
 265  *           PEN_GetObject
 266  */
 267 static INT PEN_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
 268 {
 269     PENOBJ *pen = GDI_GetObjPtr( handle, 0 );
 270     INT ret = 0;
 271
 272     if (!pen) return 0;
 273
 274     switch (pen->header.type)
 275     {
 276     case OBJ_PEN:
 277     {
 278         LOGPEN *lp;
 279
 280         if (!buffer) ret = sizeof(LOGPEN);
 281         else if (count < sizeof(LOGPEN)) ret = 0;
 282         else if ((pen->logpen.elpPenStyle & PS_STYLE_MASK) == PS_NULL && count == sizeof(EXTLOGPEN))
 283         {
 284             EXTLOGPEN *elp = buffer;
 285             *elp = pen->logpen;
 286             elp->elpWidth = 0;
 287             ret = sizeof(EXTLOGPEN);
 288         }
 289         else
 290         {
 291             lp = buffer;
 292             lp->lopnStyle = pen->logpen.elpPenStyle;
 293             lp->lopnColor = pen->logpen.elpColor;
 294             lp->lopnWidth.x = pen->logpen.elpWidth;
 295             lp->lopnWidth.y = 0;
 296             ret = sizeof(LOGPEN);
 297         }
 298         break;
 299     }
 300
 301     case OBJ_EXTPEN:
 302         ret = sizeof(EXTLOGPEN) + pen->logpen.elpNumEntries * sizeof(DWORD) - sizeof(pen->logpen.elpStyleEntry);
 303         if (buffer)
 304         {
 305             if (count < ret) ret = 0;
 306             else memcpy(buffer, &pen->logpen, ret);
 307         }
 308         break;
 309     }
 310     GDI_ReleaseObj( handle );
 311     return ret;
 312 }