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
 120 HPEN WINAPI ExtCreatePen( DWORD style, DWORD width,
 121                               const LOGBRUSH * brush, DWORD style_count,
 122                               const DWORD *style_bits )
 123 {
 124     PENOBJ * penPtr;
 125     HPEN hpen;
 126
 127     if ((style & PS_STYLE_MASK) == PS_USERSTYLE)
 128     {
 129         if(((INT)style_count) <= 0)
 130             return 0;
 131
 132         if ((style_count > 16) || !style_bits)
 133         {
 134             SetLastError(ERROR_INVALID_PARAMETER);
 135             return 0;
 136         }
 137
 138         if ((style & PS_TYPE_MASK) == PS_GEOMETRIC)
 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 = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET(PENOBJ,logpen.elpStyleEntry[style_count]))))
 194         return 0;
 195
 196     penPtr->logpen.elpPenStyle = style;
 197     penPtr->logpen.elpWidth = abs(width);
 198     penPtr->logpen.elpBrushStyle = brush->lbStyle;
 199     penPtr->logpen.elpColor = brush->lbColor;
 200     penPtr->logpen.elpHatch = brush->lbHatch;
 201     penPtr->logpen.elpNumEntries = style_count;
 202     memcpy(penPtr->logpen.elpStyleEntry, style_bits, style_count * sizeof(DWORD));
 203
 204     if (!(hpen = alloc_gdi_handle( &penPtr->header, OBJ_EXTPEN, &pen_funcs )))
 205         HeapFree( GetProcessHeap(), 0, penPtr );
 206     return hpen;
 207 }
 208
 209 /***********************************************************************
 210  *           PEN_SelectObject
 211  */
 212 static HGDIOBJ PEN_SelectObject( HGDIOBJ handle, HDC hdc )
 213 {
 214     PHYSDEV physdev;
 215     HGDIOBJ ret = 0;
 216     DC *dc = get_dc_ptr( hdc );
 217
 218     if (!dc)
 219     {
 220         SetLastError( ERROR_INVALID_HANDLE );
 221         return 0;
 222     }
 223
 224     if (!GDI_inc_ref_count( handle ))
 225     {
 226         release_dc_ptr( dc );
 227         return 0;
 228     }
 229
 230     physdev = GET_DC_PHYSDEV( dc, pSelectPen );
 231     if (!physdev->funcs->pSelectPen( physdev, handle ))
 232     {
 233         GDI_dec_ref_count( handle );
 234     }
 235     else
 236     {
 237         ret = dc->hPen;
 238         dc->hPen = handle;
 239         GDI_dec_ref_count( ret );
 240     }
 241     release_dc_ptr( dc );
 242     return ret;
 243 }
 244
 245
 246 /***********************************************************************
 247  *           PEN_DeleteObject
 248  */
 249 static BOOL PEN_DeleteObject( HGDIOBJ handle )
 250 {
 251     PENOBJ *pen = free_gdi_handle( handle );
 252
 253     if (!pen) return FALSE;
 254     return HeapFree( GetProcessHeap(), 0, pen );
 255 }
 256
 257
 258 /***********************************************************************
 259  *           PEN_GetObject
 260  */
 261 static INT PEN_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
 262 {
 263     PENOBJ *pen = GDI_GetObjPtr( handle, 0 );
 264     INT ret = 0;
 265
 266     if (!pen) return 0;
 267
 268     switch (pen->header.type)
 269     {
 270     case OBJ_PEN:
 271     {
 272         LOGPEN *lp;
 273
 274         if (!buffer) ret = sizeof(LOGPEN);
 275         else if (count < sizeof(LOGPEN)) ret = 0;
 276         else if ((pen->logpen.elpPenStyle & PS_STYLE_MASK) == PS_NULL && count == sizeof(EXTLOGPEN))
 277         {
 278             EXTLOGPEN *elp = buffer;
 279             *elp = pen->logpen;
 280             elp->elpWidth = 0;
 281             ret = sizeof(EXTLOGPEN);
 282         }
 283         else
 284         {
 285             lp = buffer;
 286             lp->lopnStyle = pen->logpen.elpPenStyle;
 287             lp->lopnColor = pen->logpen.elpColor;
 288             lp->lopnWidth.x = pen->logpen.elpWidth;
 289             lp->lopnWidth.y = 0;
 290             ret = sizeof(LOGPEN);
 291         }
 292         break;
 293     }
 294
 295     case OBJ_EXTPEN:
 296         ret = sizeof(EXTLOGPEN) + pen->logpen.elpNumEntries * sizeof(DWORD) - sizeof(pen->logpen.elpStyleEntry);
 297         if (buffer)
 298         {
 299             if (count < ret) ret = 0;
 300             else memcpy(buffer, &pen->logpen, ret);
 301         }
 302         break;
 303     }
 304     GDI_ReleaseObj( handle );
 305     return ret;
 306 }