dlls/gdiplus/region.c

   1 /*
   2  * Copyright (C) 2008 Google (Lei Zhang)
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20
  21 #include "windef.h"
  22 #include "winbase.h"
  23 #include "wingdi.h"
  24
  25 #include "objbase.h"
  26
  27 #include "gdiplus.h"
  28 #include "gdiplus_private.h"
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
  32
  33 /**********************************************************
  34  *
  35  * Data returned by GdipGetRegionData (for rectangle based regions)
  36  * looks something like this:
  37  *
  38  * struct region_data_header
  39  * {
  40  *   DWORD size;     size in bytes of the data - 8.
  41  *   DWORD magic1;   probably a checksum.
  42  *   DWORD magic2;   always seems to be 0xdbc01001 - version?
  43  *   DWORD num_ops;  number of combining ops * 2
  44  * };
  45  *
  46  * Then follows a sequence of combining ops and RECTFs.
  47  *
  48  * Combining ops are just stored as their CombineMode value.
  49  *
  50  * Each RECTF is preceded by the DWORD 0x10000000.  An empty rect is
  51  * stored as 0x10000002 (with no following RECTF) and an infinite rect
  52  * is stored as 0x10000003 (again with no following RECTF).
  53  *
  54  * The combining ops are stored in the reverse order to the RECTFs and in the
  55  * reverse order to which the region was constructed.
  56  *
  57  * When two or more complex regions (ie those with more than one rect)
  58  * are combined, the combining op for the two regions comes first,
  59  * then the combining ops for the rects in region 1, followed by the
  60  * rects for region 1, then follows the combining ops for region 2 and
  61  * finally region 2's rects.  Presumably you're supposed to use the
  62  * 0x10000000 rect header to find the end of the op list (the count of
  63  * the rects in each region is not stored).
  64  *
  65  * When a simple region (1 rect) is combined, it's treated as if a single rect
  66  * is being combined.
  67  *
  68  */
  69
  70 GpStatus WINGDIPAPI GdipCreateRegion(GpRegion **region)
  71 {
  72     FIXME("(%p): stub\n", region);
  73
  74     *region = NULL;
  75     return NotImplemented;
  76 }
  77
  78 GpStatus WINGDIPAPI GdipCreateRegionPath(GpPath *path, GpRegion **region)
  79 {
  80     FIXME("(%p, %p): stub\n", path, region);
  81
  82     *region = NULL;
  83     return NotImplemented;
  84 }
  85
  86 GpStatus WINGDIPAPI GdipDeleteRegion(GpRegion *region)
  87 {
  88     FIXME("(%p): stub\n", region);
  89     return NotImplemented;
  90 }
  91
  92 GpStatus WINGDIPAPI GdipGetRegionHRgn(GpRegion *region, GpGraphics *graphics, HRGN *hrgn)
  93 {
  94     FIXME("(%p, %p, %p): stub\n", region, graphics, hrgn);
  95
  96     *hrgn = NULL;
  97     return NotImplemented;
  98 }
  99
 100 GpStatus WINGDIPAPI GdipSetEmpty(GpRegion *region)
 101 {
 102     static int calls;
 103
 104     if(!(calls++))
 105         FIXME("not implemented\n");
 106
 107     return NotImplemented;
 108 }
 109
 110 GpStatus WINGDIPAPI GdipSetInfinite(GpRegion *region)
 111 {
 112     static int calls;
 113
 114     if(!(calls++))
 115         FIXME("not implemented\n");
 116
 117     return NotImplemented;
 118 }