src/gallium/auxiliary/indices/u_unfilled_gen.py

   1 #!/usr/bin/env python
   2 copyright = '''
   3 /*
   4  * Copyright 2009 VMware, Inc.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * on the rights to use, copy, modify, merge, publish, distribute, sub
  11  * license, and/or sell copies of the Software, and to permit persons to whom
  12  * the Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  21  * VMWARE AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26 '''
  27
  28 GENERATE, UBYTE, USHORT, UINT = 'generate', 'ubyte', 'ushort', 'uint'
  29 FIRST, LAST = 'first', 'last'
  30
  31 INTYPES = (GENERATE, UBYTE, USHORT, UINT)
  32 OUTTYPES = (USHORT, UINT)
  33 PRIMS=('tris',
  34        'trifan',
  35        'tristrip',
  36        'quads',
  37        'quadstrip',
  38        'polygon')
  39
  40 LONGPRIMS=('PIPE_PRIM_TRIANGLES',
  41            'PIPE_PRIM_TRIANGLE_FAN',
  42            'PIPE_PRIM_TRIANGLE_STRIP',
  43            'PIPE_PRIM_QUADS',
  44            'PIPE_PRIM_QUAD_STRIP',
  45            'PIPE_PRIM_POLYGON')
  46
  47 longprim = dict(zip(PRIMS, LONGPRIMS))
  48 intype_idx = dict(ubyte='IN_UBYTE', ushort='IN_USHORT', uint='IN_UINT')
  49 outtype_idx = dict(ushort='OUT_USHORT', uint='OUT_UINT')
  50
  51
  52 def prolog():
  53     print '''/* File automatically generated by u_unfilled_gen.py */'''
  54     print copyright
  55     print r'''
  56
  57 /**
  58  * @file
  59  * Functions to translate and generate index lists
  60  */
  61
  62 #include "indices/u_indices.h"
  63 #include "indices/u_indices_priv.h"
  64 #include "pipe/p_compiler.h"
  65 #include "util/u_debug.h"
  66 #include "pipe/p_defines.h"
  67 #include "util/u_memory.h"
  68
  69
  70 static unsigned out_size_idx( unsigned index_size )
  71 {
  72    switch (index_size) {
  73    case 4: return OUT_UINT;
  74    case 2: return OUT_USHORT;
  75    default: assert(0); return OUT_USHORT;
  76    }
  77 }
  78
  79 static unsigned in_size_idx( unsigned index_size )
  80 {
  81    switch (index_size) {
  82    case 4: return IN_UINT;
  83    case 2: return IN_USHORT;
  84    case 1: return IN_UBYTE;
  85    default: assert(0); return IN_UBYTE;
  86    }
  87 }
  88
  89
  90 static u_generate_func generate_line[OUT_COUNT][PRIM_COUNT];
  91 static u_translate_func translate_line[IN_COUNT][OUT_COUNT][PRIM_COUNT];
  92
  93 '''
  94
  95 def vert( intype, outtype, v0 ):
  96     if intype == GENERATE:
  97         return '(' + outtype + ')(' + v0 + ')'
  98     else:
  99         return '(' + outtype + ')in[' + v0 + ']'
 100
 101 def line( intype, outtype, ptr, v0, v1 ):
 102     print '      (' + ptr + ')[0] = ' + vert( intype, outtype, v0 ) + ';'
 103     print '      (' + ptr + ')[1] = ' + vert( intype, outtype, v1 ) + ';'
 104
 105 # XXX: have the opportunity here to avoid over-drawing shared lines in
 106 # tristrips, fans, etc, by integrating this into the calling functions
 107 # and only emitting each line at most once.
 108 #
 109 def do_tri( intype, outtype, ptr, v0, v1, v2 ):
 110     line( intype, outtype, ptr, v0, v1 )
 111     line( intype, outtype, ptr + '+2', v1, v2 )
 112     line( intype, outtype, ptr + '+4', v2, v0 )
 113
 114 def do_quad( intype, outtype, ptr, v0, v1, v2, v3 ):
 115     line( intype, outtype, ptr, v0, v1 )
 116     line( intype, outtype, ptr + '+2', v1, v2 )
 117     line( intype, outtype, ptr + '+4', v2, v3 )
 118     line( intype, outtype, ptr + '+6', v3, v0 )
 119
 120 def name(intype, outtype, prim):
 121     if intype == GENERATE:
 122         return 'generate_' + prim + '_' + outtype
 123     else:
 124         return 'translate_' + prim + '_' + intype + '2' + outtype
 125
 126 def preamble(intype, outtype, prim):
 127     print 'static void ' + name( intype, outtype, prim ) + '('
 128     if intype != GENERATE:
 129         print '    const void * _in,'
 130     print '    unsigned start,'
 131     print '    unsigned nr,'
 132     print '    void *_out )'
 133     print '{'
 134     if intype != GENERATE:
 135         print '  const ' + intype + '*in = (const ' + intype + '*)_in;'
 136     print '  ' + outtype + ' *out = (' + outtype + '*)_out;'
 137     print '  unsigned i, j;'
 138     print '  (void)j;'
 139
 140 def postamble():
 141     print '}'
 142
 143
 144 def tris(intype, outtype):
 145     preamble(intype, outtype, prim='tris')
 146     print '  for (i = start, j = 0; j < nr; j+=6, i+=3) { '
 147     do_tri( intype, outtype, 'out+j',  'i', 'i+1', 'i+2' );
 148     print '   }'
 149     postamble()
 150
 151
 152 def tristrip(intype, outtype):
 153     preamble(intype, outtype, prim='tristrip')
 154     print '  for (i = start, j = 0; j < nr; j+=6, i++) { '
 155     do_tri( intype, outtype, 'out+j',  'i', 'i+1/*+(i&1)*/', 'i+2/*-(i&1)*/' );
 156     print '   }'
 157     postamble()
 158
 159
 160 def trifan(intype, outtype):
 161     preamble(intype, outtype, prim='trifan')
 162     print '  for (i = start, j = 0; j < nr; j+=6, i++) { '
 163     do_tri( intype, outtype, 'out+j',  '0', 'i+1', 'i+2' );
 164     print '   }'
 165     postamble()
 166
 167
 168
 169 def polygon(intype, outtype):
 170     preamble(intype, outtype, prim='polygon')
 171     print '  for (i = start, j = 0; j < nr; j+=2, i++) { '
 172     line( intype, outtype, 'out+j', 'i', '(i+1)%(nr/2)' )
 173     print '   }'
 174     postamble()
 175
 176
 177 def quads(intype, outtype):
 178     preamble(intype, outtype, prim='quads')
 179     print '  for (i = start, j = 0; j < nr; j+=8, i+=4) { '
 180     do_quad( intype, outtype, 'out+j', 'i+0', 'i+1', 'i+2', 'i+3' );
 181     print '   }'
 182     postamble()
 183
 184
 185 def quadstrip(intype, outtype):
 186     preamble(intype, outtype, prim='quadstrip')
 187     print '  for (i = start, j = 0; j < nr; j+=8, i+=2) { '
 188     do_quad( intype, outtype, 'out+j', 'i+2', 'i+0', 'i+1', 'i+3' );
 189     print '   }'
 190     postamble()
 191
 192
 193 def emit_funcs():
 194     for intype in INTYPES:
 195         for outtype in OUTTYPES:
 196             tris(intype, outtype)
 197             tristrip(intype, outtype)
 198             trifan(intype, outtype)
 199             quads(intype, outtype)
 200             quadstrip(intype, outtype)
 201             polygon(intype, outtype)
 202
 203 def init(intype, outtype, prim):
 204     if intype == GENERATE:
 205         print ('generate_line[' +
 206                outtype_idx[outtype] +
 207                '][' + longprim[prim] +
 208                '] = ' + name( intype, outtype, prim ) + ';')
 209     else:
 210         print ('translate_line[' +
 211                intype_idx[intype] +
 212                '][' + outtype_idx[outtype] +
 213                '][' + longprim[prim] +
 214                '] = ' + name( intype, outtype, prim ) + ';')
 215
 216
 217 def emit_all_inits():
 218     for intype in INTYPES:
 219         for outtype in OUTTYPES:
 220             for prim in PRIMS:
 221                 init(intype, outtype, prim)
 222
 223 def emit_init():
 224     print 'void u_unfilled_init( void )'
 225     print '{'
 226     print '  static int firsttime = 1;'
 227     print '  if (!firsttime) return;'
 228     print '  firsttime = 0;'
 229     emit_all_inits()
 230     print '}'
 231
 232
 233
 234
 235 def epilog():
 236     print '#include "indices/u_unfilled_indices.c"'
 237
 238
 239 def main():
 240     prolog()
 241     emit_funcs()
 242     emit_init()
 243     epilog()
 244
 245
 246 if __name__ == '__main__':
 247     main()