src/gallium/state_trackers/vega/path_utils.h

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.  All Rights Reserved.
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   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
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  10  * permit persons to whom the Software is furnished to do so, subject to
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  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
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  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  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
  37 static 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
  54 static 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