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/* $Id: m_clip_debug.c,v 1.1 2003-04-24 13:37:46 giacomo Exp $ */

/*

 * Mesa 3-D graphics library

 * Version:  5.0

 *

 * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 * Authors:

 *    Gareth Hughes

 */

#include "glheader.h"

#include "context.h"

#include "macros.h"

#include "imports.h"

#include "m_matrix.h"

#include "m_xform.h"

#include "m_debug.h"

#include "m_debug_util.h"

#ifdef DEBUG  /* This code only used for debugging */

static clip_func *clip_tab[2] = {

   _mesa_clip_tab,

   _mesa_clip_np_tab

};

static char *cnames[2] = {

   "_mesa_clip_tab",

   "_mesa_clip_np_tab"

};

#ifdef RUN_DEBUG_BENCHMARK

static char *cstrings[2] = {

   "clip, perspective divide",

   "clip, no divide"

};

#endif

/* =============================================================

 * Reference cliptests

 */

static GLvector4f *ref_cliptest_points4( GLvector4f *clip_vec,

                                         GLvector4f *proj_vec,

                                         GLubyte clipMask[],

                                         GLubyte *orMask,

                                         GLubyte *andMask )

{

   const GLuint stride = clip_vec->stride;

   const GLuint count = clip_vec->count;

   const GLfloat *from = (GLfloat *)clip_vec->start;

   GLuint c = 0;

   GLfloat (*vProj)[4] = (GLfloat (*)[4])proj_vec->start;

   GLubyte tmpAndMask = *andMask;

   GLubyte tmpOrMask = *orMask;

   GLuint i;

   for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {

      const GLfloat cx = from[0];

      const GLfloat cy = from[1];

      const GLfloat cz = from[2];

      const GLfloat cw = from[3];

      GLubyte mask = 0;

      if ( -cx + cw < 0 ) mask |= CLIP_RIGHT_BIT;

      if (  cx + cw < 0 ) mask |= CLIP_LEFT_BIT;

      if ( -cy + cw < 0 ) mask |= CLIP_TOP_BIT;

      if (  cy + cw < 0 ) mask |= CLIP_BOTTOM_BIT;

      if ( -cz + cw < 0 ) mask |= CLIP_FAR_BIT;

      if (  cz + cw < 0 ) mask |= CLIP_NEAR_BIT;

      clipMask[i] = mask;

      if ( mask ) {

         c++;

         tmpAndMask &= mask;

         tmpOrMask |= mask;

         vProj[i][0] = 0;

         vProj[i][1] = 0;

         vProj[i][2] = 0;

         vProj[i][3] = 1;

      } else {

         GLfloat oow = 1.0F / cw;

         vProj[i][0] = cx * oow;

         vProj[i][1] = cy * oow;

         vProj[i][2] = cz * oow;

         vProj[i][3] = oow;

      }

   }

   *orMask = tmpOrMask;

   *andMask = (GLubyte) (c < count ? 0 : tmpAndMask);

   proj_vec->flags |= VEC_SIZE_4;

   proj_vec->size = 4;

   proj_vec->count = clip_vec->count;

   return proj_vec;

}

/* Keep these here for now, even though we don't use them...

 */

static GLvector4f *ref_cliptest_points3( GLvector4f *clip_vec,

                                         GLvector4f *proj_vec,

                                         GLubyte clipMask[],

                                         GLubyte *orMask,

                                         GLubyte *andMask )

{

   const GLuint stride = clip_vec->stride;

   const GLuint count = clip_vec->count;

   const GLfloat *from = (GLfloat *)clip_vec->start;

   GLubyte tmpOrMask = *orMask;

   GLubyte tmpAndMask = *andMask;

   GLuint i;

   for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {

      const GLfloat cx = from[0], cy = from[1], cz = from[2];

      GLubyte mask = 0;

      if ( cx >  1.0 )          mask |= CLIP_RIGHT_BIT;

      else if ( cx < -1.0 )     mask |= CLIP_LEFT_BIT;

      if ( cy >  1.0 )          mask |= CLIP_TOP_BIT;

      else if ( cy < -1.0 )     mask |= CLIP_BOTTOM_BIT;

      if ( cz >  1.0 )          mask |= CLIP_FAR_BIT;

      else if ( cz < -1.0 )     mask |= CLIP_NEAR_BIT;

      clipMask[i] = mask;

      tmpOrMask |= mask;

      tmpAndMask &= mask;

   }

   *orMask = tmpOrMask;

   *andMask = tmpAndMask;

   return clip_vec;

}

static GLvector4f * ref_cliptest_points2( GLvector4f *clip_vec,

                                          GLvector4f *proj_vec,

                                          GLubyte clipMask[],

                                          GLubyte *orMask,

                                          GLubyte *andMask )

{

   const GLuint stride = clip_vec->stride;

   const GLuint count = clip_vec->count;

   const GLfloat *from = (GLfloat *)clip_vec->start;

   GLubyte tmpOrMask = *orMask;

   GLubyte tmpAndMask = *andMask;

   GLuint i;

   for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {

      const GLfloat cx = from[0], cy = from[1];

      GLubyte mask = 0;

      if ( cx >  1.0 )          mask |= CLIP_RIGHT_BIT;

      else if ( cx < -1.0 )     mask |= CLIP_LEFT_BIT;

      if ( cy >  1.0 )          mask |= CLIP_TOP_BIT;

      else if ( cy < -1.0 )     mask |= CLIP_BOTTOM_BIT;

      clipMask[i] = mask;

      tmpOrMask |= mask;

      tmpAndMask &= mask;

   }

   *orMask = tmpOrMask;

   *andMask = tmpAndMask;

   return clip_vec;

}

static clip_func ref_cliptest[5] = {

   0,

   0,

   ref_cliptest_points2,

   ref_cliptest_points3,

   ref_cliptest_points4

};

/* =============================================================

 * Cliptest tests

 */

static GLfloat s[TEST_COUNT][4] ALIGN16;

static GLfloat d[TEST_COUNT][4] ALIGN16;

static GLfloat r[TEST_COUNT][4] ALIGN16;

static int test_cliptest_function( clip_func func, int np,

                                   int psize, long *cycles )

{

   GLvector4f source[1], dest[1], ref[1];

   GLubyte dm[TEST_COUNT], dco, dca;

   GLubyte rm[TEST_COUNT], rco, rca;

   int i, j;

#ifdef  RUN_DEBUG_BENCHMARK

   int cycle_i;                /* the counter for the benchmarks we run */

#endif

   (void) cycles;

   if ( psize > 4 ) {

      _mesa_problem( NULL, "test_cliptest_function called with psize > 4\n" );

      return 0;

   }

   for ( i = 0 ; i < TEST_COUNT ; i++) {

      ASSIGN_4V( d[i], 0.0, 0.0, 0.0, 1.0 );

      ASSIGN_4V( s[i], 0.0, 0.0, 0.0, 1.0 );

      for ( j = 0 ; j < psize ; j++ )

         s[i][j] = rnd();

   }

   source->data = (GLfloat(*)[4])s;

   source->start = (GLfloat *)s;

   source->count = TEST_COUNT;

   source->stride = sizeof(s[0]);

   source->size = 4;

   source->flags = 0;

   dest->data = (GLfloat(*)[4])d;

   dest->start = (GLfloat *)d;

   dest->count = TEST_COUNT;

   dest->stride = sizeof(float[4]);

   dest->size = 0;

   dest->flags = 0;

   ref->data = (GLfloat(*)[4])r;

   ref->start = (GLfloat *)r;

   ref->count = TEST_COUNT;

   ref->stride = sizeof(float[4]);

   ref->size = 0;

   ref->flags = 0;

   dco = rco = 0;

   dca = rca = CLIP_ALL_BITS;

   ref_cliptest[psize]( source, ref, rm, &rco, &rca );

   if ( mesa_profile ) {

      BEGIN_RACE( *cycles );

      func( source, dest, dm, &dco, &dca );

      END_RACE( *cycles );

   }

   else {

      func( source, dest, dm, &dco, &dca );

   }

   if ( dco != rco ) {

      _mesa_printf(NULL, "\n-----------------------------\n" );

      _mesa_printf(NULL, "dco = 0x%02x   rco = 0x%02x\n", dco, rco );

      return 0;

   }

   if ( dca != rca ) {

      _mesa_printf(NULL, "\n-----------------------------\n" );

      _mesa_printf(NULL, "dca = 0x%02x   rca = 0x%02x\n", dca, rca );

      return 0;

   }

   for ( i = 0 ; i < TEST_COUNT ; i++ ) {

      if ( dm[i] != rm[i] ) {

         _mesa_printf(NULL, "\n-----------------------------\n" );

         _mesa_printf(NULL, "(i = %i)\n", i );

         _mesa_printf(NULL, "dm = 0x%02x   rm = 0x%02x\n", dm[i], rm[i] );

         return 0;

      }

   }

   /* Only verify output on projected points4 case.  FIXME: Do we need

    * to test other cases?

    */

   if ( np || psize < 4 )

      return 1;

   for ( i = 0 ; i < TEST_COUNT ; i++ ) {

      for ( j = 0 ; j < 4 ; j++ ) {

         if ( significand_match( d[i][j], r[i][j] ) < REQUIRED_PRECISION ) {

            _mesa_printf(NULL, "\n-----------------------------\n" );

            _mesa_printf(NULL, "(i = %i, j = %i)  dm = 0x%02x   rm = 0x%02x\n",

                    i, j, dm[i], rm[i] );

            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",

                    d[i][0], r[i][0], r[i][0]-d[i][0],

                    MAX_PRECISION - significand_match( d[i][0], r[i][0] ) );

            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",

                    d[i][1], r[i][1], r[i][1]-d[i][1],

                    MAX_PRECISION - significand_match( d[i][1], r[i][1] ) );

            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",

                    d[i][2], r[i][2], r[i][2]-d[i][2],

                    MAX_PRECISION - significand_match( d[i][2], r[i][2] ) );

            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",

                    d[i][3], r[i][3], r[i][3]-d[i][3],

                    MAX_PRECISION - significand_match( d[i][3], r[i][3] ) );

            return 0;

         }

      }

   }

   return 1;

}

void _math_test_all_cliptest_functions( char *description )

{

   int np, psize;

   long benchmark_tab[2][4];

   static int first_time = 1;

   if ( first_time ) {

      first_time = 0;

      mesa_profile = _mesa_getenv( "MESA_PROFILE" );

   }

#ifdef RUN_DEBUG_BENCHMARK

   if ( mesa_profile ) {

      if ( !counter_overhead ) {

         INIT_COUNTER();

         _mesa_printf(NULL, "counter overhead: %ld cycles\n\n", counter_overhead );

      }

      _mesa_printf(NULL, "cliptest results after hooking in %s functions:\n", description );

   }

#endif

#ifdef RUN_DEBUG_BENCHMARK

   if ( mesa_profile ) {

      _mesa_printf(NULL, "\n\t" );

      for ( psize = 2 ; psize <= 4 ; psize++ ) {

         _mesa_printf(NULL, " p%d\t", psize );

      }

      _mesa_printf(NULL, "\n--------------------------------------------------------\n\t" );

   }

#endif

   for ( np = 0 ; np < 2 ; np++ ) {

      for ( psize = 2 ; psize <= 4 ; psize++ ) {

         clip_func func = clip_tab[np][psize];

         long *cycles = &(benchmark_tab[np][psize-1]);

         if ( test_cliptest_function( func, np, psize, cycles ) == 0 ) {

            char buf[100];

            _mesa_sprintf(NULL, buf, "%s[%d] failed test (%s)",

                     cnames[np], psize, description );

            _mesa_problem( NULL, buf );

         }

#ifdef RUN_DEBUG_BENCHMARK

         if ( mesa_profile )

            _mesa_printf(NULL, " %li\t", benchmark_tab[np][psize-1] );

#endif

      }

#ifdef RUN_DEBUG_BENCHMARK

      if ( mesa_profile )

         _mesa_printf(NULL, " | [%s]\n\t", cstrings[np] );

#endif

   }

#ifdef RUN_DEBUG_BENCHMARK

   if ( mesa_profile )

      _mesa_printf(NULL, "\n" );

#endif

}

#endif /* DEBUG */