dlls/gdi32/objects.c

   1 /*
   2  * GDI functions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  * Copyright 2021 Jacek Caban for CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "winnls.h"
  27 #include "ntgdi.h"
  28 #include "winternl.h"
  29
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  33
  34
  35 static GDI_SHARED_MEMORY *get_gdi_shared(void)
  36 {
  37 #ifndef _WIN64
  38     if (NtCurrentTeb()->GdiBatchCount)
  39     {
  40         TEB64 *teb64 = (TEB64 *)(UINT_PTR)NtCurrentTeb()->GdiBatchCount;
  41         PEB64 *peb64 = (PEB64 *)(UINT_PTR)teb64->Peb;
  42         return (GDI_SHARED_MEMORY *)(UINT_PTR)peb64->GdiSharedHandleTable;
  43     }
  44 #endif
  45     return (GDI_SHARED_MEMORY *)NtCurrentTeb()->Peb->GdiSharedHandleTable;
  46 }
  47
  48 static inline GDI_HANDLE_ENTRY *handle_entry( HGDIOBJ handle )
  49 {
  50     GDI_SHARED_MEMORY *gdi_shared = get_gdi_shared();
  51     unsigned int idx = LOWORD(handle);
  52
  53     if (idx < GDI_MAX_HANDLE_COUNT && gdi_shared->Handles[idx].Type)
  54     {
  55         if (!HIWORD( handle ) || HIWORD( handle ) == gdi_shared->Handles[idx].Unique)
  56             return &gdi_shared->Handles[idx];
  57     }
  58     if (handle) WARN( "invalid handle %p\n", handle );
  59     return NULL;
  60 }
  61
  62 static WORD get_object_type( HGDIOBJ obj )
  63 {
  64     GDI_HANDLE_ENTRY *entry = handle_entry( obj );
  65     return entry ? entry->ExtType : 0;
  66 }
  67
  68 void set_gdi_client_ptr( HGDIOBJ obj, void *ptr )
  69 {
  70     GDI_HANDLE_ENTRY *entry = handle_entry( obj );
  71     if (entry) entry->UserPointer = (UINT_PTR)ptr;
  72 }
  73
  74 void *get_gdi_client_ptr( HGDIOBJ obj, WORD type )
  75 {
  76     GDI_HANDLE_ENTRY *entry = handle_entry( obj );
  77     if (!entry || entry->ExtType != type || !entry->UserPointer)
  78         return NULL;
  79     return (void *)(UINT_PTR)entry->UserPointer;
  80 }
  81
  82 /***********************************************************************
  83  *           GetObjectType    (GDI32.@)
  84  */
  85 DWORD WINAPI GetObjectType( HGDIOBJ handle )
  86 {
  87     DWORD type = get_object_type( handle );
  88
  89     TRACE( "%p -> %u\n", handle, type );
  90
  91     switch (type)
  92     {
  93     case NTGDI_OBJ_PEN:         return OBJ_PEN;
  94     case NTGDI_OBJ_BRUSH:       return OBJ_BRUSH;
  95     case NTGDI_OBJ_DC:          return OBJ_DC;
  96     case NTGDI_OBJ_METADC:      return OBJ_METADC;
  97     case NTGDI_OBJ_PAL:         return OBJ_PAL;
  98     case NTGDI_OBJ_FONT:        return OBJ_FONT;
  99     case NTGDI_OBJ_BITMAP:      return OBJ_BITMAP;
 100     case NTGDI_OBJ_REGION:      return OBJ_REGION;
 101     case NTGDI_OBJ_METAFILE:    return OBJ_METAFILE;
 102     case NTGDI_OBJ_MEMDC:       return OBJ_MEMDC;
 103     case NTGDI_OBJ_EXTPEN:      return OBJ_EXTPEN;
 104     case NTGDI_OBJ_ENHMETADC:   return OBJ_ENHMETADC;
 105     case NTGDI_OBJ_ENHMETAFILE: return OBJ_ENHMETAFILE;
 106     default:
 107         SetLastError( ERROR_INVALID_HANDLE );
 108         return 0;
 109     }
 110 }
 111
 112 /***********************************************************************
 113  *           DeleteObject    (GDI32.@)
 114  *
 115  * Delete a Gdi object.
 116  */
 117 BOOL WINAPI DeleteObject( HGDIOBJ obj )
 118 {
 119     return NtGdiDeleteObjectApp( obj );
 120 }
 121
 122 /***********************************************************************
 123  *           SelectObject    (GDI32.@)
 124  *
 125  * Select a Gdi object into a device context.
 126  */
 127 HGDIOBJ WINAPI SelectObject( HDC hdc, HGDIOBJ obj )
 128 {
 129     HGDIOBJ ret;
 130
 131     TRACE( "(%p,%p)\n", hdc, obj );
 132
 133     switch (get_object_type( obj ))
 134     {
 135     case NTGDI_OBJ_PEN:
 136     case NTGDI_OBJ_EXTPEN:
 137         ret = NtGdiSelectPen( hdc, obj );
 138         break;
 139     case NTGDI_OBJ_BRUSH:
 140         ret = NtGdiSelectBrush( hdc, obj );
 141         break;
 142     case NTGDI_OBJ_FONT:
 143         ret = NtGdiSelectFont( hdc, obj );
 144         break;
 145     case NTGDI_OBJ_BITMAP:
 146         ret = NtGdiSelectBitmap( hdc, obj );
 147         break;
 148     case NTGDI_OBJ_REGION:
 149         ret = ULongToHandle(SelectClipRgn( hdc, obj ));
 150         break;
 151     default:
 152         return 0;
 153     }
 154
 155     if (!ret) SetLastError( ERROR_INVALID_HANDLE );
 156     return ret;
 157 }
 158
 159 /***********************************************************************
 160  *           GetObjectW    (GDI32.@)
 161  */
 162 INT WINAPI GetObjectW( HGDIOBJ handle, INT count, void *buffer )
 163 {
 164     int result;
 165
 166     TRACE( "%p %d %p\n", handle, count, buffer );
 167
 168     result = NtGdiExtGetObjectW( handle, count, buffer );
 169     if (!result && count)
 170     {
 171         switch(get_object_type( handle ))
 172         {
 173         case 0:
 174         case NTGDI_OBJ_BITMAP:
 175         case NTGDI_OBJ_BRUSH:
 176         case NTGDI_OBJ_FONT:
 177         case NTGDI_OBJ_PAL:
 178         case NTGDI_OBJ_PEN:
 179         case NTGDI_OBJ_EXTPEN:
 180             break;
 181         default:
 182             SetLastError( ERROR_INVALID_HANDLE );
 183         }
 184     }
 185     return result;
 186 }
 187
 188 /***********************************************************************
 189  *           GetObjectA    (GDI32.@)
 190  */
 191 INT WINAPI GetObjectA( HGDIOBJ handle, INT count, void *buffer )
 192 {
 193     TRACE("%p %d %p\n", handle, count, buffer );
 194
 195     if (get_object_type( handle ) == NTGDI_OBJ_FONT)
 196     {
 197         LOGFONTA *lfA = buffer;
 198         LOGFONTW lf;
 199
 200         if (!buffer) return sizeof(*lfA);
 201         if (!GetObjectW( handle, sizeof(lf), &lf )) return 0;
 202         if (count > sizeof(*lfA)) count = sizeof(*lfA);
 203         memcpy( lfA, &lf, min( count, FIELD_OFFSET(LOGFONTA, lfFaceName) ));
 204         if (count > FIELD_OFFSET(LOGFONTA, lfFaceName))
 205         {
 206             WideCharToMultiByte( CP_ACP, 0, lf.lfFaceName, -1, lfA->lfFaceName,
 207                                  count - FIELD_OFFSET(LOGFONTA, lfFaceName), NULL, NULL );
 208             if (count == sizeof(*lfA)) lfA->lfFaceName[LF_FACESIZE - 1] = 0;
 209         }
 210         return count;
 211     }
 212
 213     return GetObjectW( handle, count, buffer );
 214 }
 215
 216 /***********************************************************************
 217  *           CreatePenIndirect    (GDI32.@)
 218  */
 219 HPEN WINAPI CreatePenIndirect( const LOGPEN *pen )
 220 {
 221     return CreatePen( pen->lopnStyle, pen->lopnWidth.x, pen->lopnColor );
 222 }
 223
 224 /***********************************************************************
 225  *           CreatePen    (GDI32.@)
 226  */
 227 HPEN WINAPI CreatePen( INT style, INT width, COLORREF color )
 228 {
 229     if (style < 0 || style > PS_INSIDEFRAME) style = PS_SOLID;
 230     return NtGdiCreatePen( style, width, color, NULL );
 231 }
 232
 233 /***********************************************************************
 234  *           CreateBitmapIndirect (GDI32.@)
 235  */
 236 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
 237 {
 238     if (!bmp || bmp->bmType)
 239     {
 240         SetLastError( ERROR_INVALID_PARAMETER );
 241         return NULL;
 242     }
 243
 244     return CreateBitmap( bmp->bmWidth, bmp->bmHeight, bmp->bmPlanes,
 245                          bmp->bmBitsPixel, bmp->bmBits );
 246 }
 247
 248 /******************************************************************************
 249  *           CreateBitmap (GDI32.@)
 250  *
 251  * Creates a bitmap with the specified info.
 252  */
 253 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
 254                              UINT bpp, const void *bits )
 255 {
 256     if (!width || !height)
 257         return GetStockObject( STOCK_LAST + 1 ); /* default 1x1 bitmap */
 258
 259     return NtGdiCreateBitmap( width, height, planes, bpp, bits );
 260 }
 261
 262 /******************************************************************************
 263  *           CreateDiscardableBitmap (GDI32.@)
 264  *
 265  * Creates a discardable bitmap.
 266  */
 267 HBITMAP WINAPI CreateDiscardableBitmap( HDC hdc, INT width, INT height )
 268 {
 269     return CreateCompatibleBitmap( hdc, width, height );
 270 }
 271
 272 /***********************************************************************
 273  *           ExtCreateRegion   (GDI32.@)
 274  *
 275  * Creates a region as specified by the transformation data and region data.
 276  */
 277 HRGN WINAPI ExtCreateRegion( const XFORM *xform, DWORD count, const RGNDATA *data )
 278 {
 279     if (!data)
 280     {
 281         SetLastError( ERROR_INVALID_PARAMETER );
 282         return 0;
 283     }
 284
 285     return NtGdiExtCreateRegion( xform, count, data );
 286 }
 287
 288 /***********************************************************************
 289  *           CreateRectRgnIndirect    (GDI32.@)
 290  *
 291  * Creates a simple rectangular region.
 292  */
 293 HRGN WINAPI CreateRectRgnIndirect( const RECT* rect )
 294 {
 295     return NtGdiCreateRectRgn( rect->left, rect->top, rect->right, rect->bottom );
 296 }
 297
 298 /***********************************************************************
 299  *           CreateEllipticRgnIndirect    (GDI32.@)
 300  *
 301  * Creates an elliptical region.
 302  */
 303 HRGN WINAPI CreateEllipticRgnIndirect( const RECT *rect )
 304 {
 305     return NtGdiCreateEllipticRgn( rect->left, rect->top, rect->right, rect->bottom );
 306 }
 307
 308 /***********************************************************************
 309  *           CreatePolygonRgn    (GDI32.@)
 310  */
 311 HRGN WINAPI CreatePolygonRgn( const POINT *points, INT count, INT mode )
 312 {
 313     return CreatePolyPolygonRgn( points, &count, 1, mode );
 314 }