1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.  All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 **************************************************************************/
26
27#ifndef PATH_UTILS_H
28#define PATH_UTILS_H
29
30#include "VG/openvg.h"
31
32#define SEGMENT_COMMAND(command) /* Extract segment type */     \
33    ((command) & 0x1e)
34#define SEGMENT_ABS_REL(command) /* Extract absolute/relative bit */ \
35    ((command) & 0x1)
36
37static INLINE VGint size_for_datatype(VGPathDatatype datatype)
38{
39   switch(datatype) {
40   case VG_PATH_DATATYPE_S_8:
41      return 1;
42   case VG_PATH_DATATYPE_S_16:
43      return 2;
44   case VG_PATH_DATATYPE_S_32:
45      return 4;
46   case VG_PATH_DATATYPE_F:
47      return 4;
48   default:
49      assert(!"unknown datatype");
50   }
51   return 0;
52}
53
54static INLINE VGint num_elements_for_segments(const VGubyte *segments,
55                                              VGint num_segments)
56{
57   VGint i;
58   VGint count = 0;
59
60   for (i = 0; i < num_segments; ++i) {
61      VGubyte segment = segments[i];
62      VGint command = SEGMENT_COMMAND(segment);
63      switch(command) {
64      case VG_CLOSE_PATH:
65         break;
66      case VG_MOVE_TO:
67         count += 2;
68         break;
69      case VG_LINE_TO:
70         count += 2;
71         break;
72      case VG_HLINE_TO:
73         count += 1;
74         break;
75      case VG_VLINE_TO:
76         count += 1;
77         break;
78      case VG_QUAD_TO:
79         count += 4;
80         break;
81      case VG_CUBIC_TO:
82         count += 6;
83         break;
84      case VG_SQUAD_TO:
85         count += 2;
86         break;
87      case VG_SCUBIC_TO:
88         count += 4;
89         break;
90      case VG_SCCWARC_TO:
91         count += 5;
92         break;
93      case VG_SCWARC_TO:
94         count += 5;
95         break;
96      case VG_LCCWARC_TO:
97         count += 5;
98         break;
99      case VG_LCWARC_TO:
100         count += 5;
101         break;
102      default:
103         assert(!"Unknown segment!");
104      }
105   }
106   return count;
107}
108
109#endif
110