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/*
 * Mesa 3-D graphics library
 * Version:  3.5
 *
 * 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:
 *    Keith Whitwell <keith@tungstengraphics.com>
 */
#include "math/m_translate.h"

#if (HAVE_HW_VIEWPORT)
#define UNVIEWPORT_VARS
#define UNVIEWPORT_X(x) x
#define UNVIEWPORT_Y(x) x
#define UNVIEWPORT_Z(x) x
#endif

#ifndef LOCALVARS
#define LOCALVARS
#endif

#ifndef CHECK_HW_DIVIDE
#define CHECK_HW_DIVIDE 1
#endif

/* These don't need to be duplicated, but there's currently nowhere
 * really convenient to put them.  Need to build some actual .o files in
 * this directory?
 */
static void copy_pv_rgba4_spec5( GLcontext *ctx, GLuint edst, GLuint esrc )
{
   LOCALVARS  
   GLubyte *verts = GET_VERTEX_STORE();
   GLuint shift = GET_VERTEX_STRIDE_SHIFT();
   GLuint *dst = (GLuint *)(verts + (edst << shift));
   GLuint *src = (GLuint *)(verts + (esrc << shift));
   dst[4] = src[4];
   dst[5] = src[5];
}

static void copy_pv_rgba4( GLcontext *ctx, GLuint edst, GLuint esrc )
{
   LOCALVARS
   GLubyte *verts = GET_VERTEX_STORE();
   GLuint shift = GET_VERTEX_STRIDE_SHIFT();
   GLuint *dst = (GLuint *)(verts + (edst << shift));
   GLuint *src = (GLuint *)(verts + (esrc << shift));
   dst[4] = src[4];
}

static void copy_pv_rgba3( GLcontext *ctx, GLuint edst, GLuint esrc )
{
   LOCALVARS
   GLubyte *verts = GET_VERTEX_STORE();
   GLuint shift = GET_VERTEX_STRIDE_SHIFT();
   GLuint *dst = (GLuint *)(verts + (edst << shift));
   GLuint *src = (GLuint *)(verts + (esrc << shift));
   dst[3] = src[3];
}


void TAG(translate_vertex)(GLcontext *ctx,
                           const VERTEX *src,
                           SWvertex *dst)
{
   LOCALVARS
   GLuint format = GET_VERTEX_FORMAT();
   GLfloat *s = ctx->Viewport._WindowMap.m;
   UNVIEWPORT_VARS;

   if (format == TINY_VERTEX_FORMAT) {
      if (HAVE_HW_VIEWPORT) {
         dst->win[0] = s[0]  * src->v.x + s[12];
         dst->win[1] = s[5]  * src->v.y + s[13];
         dst->win[2] = s[10] * src->v.z + s[14];
         dst->win[3] = 1.0;
      } else {
         dst->win[0] = UNVIEWPORT_X( src->v.x );
         dst->win[1] = UNVIEWPORT_Y( src->v.y );
         dst->win[2] = UNVIEWPORT_Z( src->v.z );
         dst->win[3] = 1.0;
      }

      dst->color[0] = src->tv.color.red;
      dst->color[1] = src->tv.color.green;
      dst->color[2] = src->tv.color.blue;
      dst->color[3] = src->tv.color.alpha;
   }
   else {
      if (HAVE_HW_VIEWPORT) {
         if (HAVE_HW_DIVIDE && CHECK_HW_DIVIDE) {
            GLfloat oow = 1.0 / src->v.w;
            dst->win[0] = s[0]  * src->v.x * oow + s[12];
            dst->win[1] = s[5]  * src->v.y * oow + s[13];
            dst->win[2] = s[10] * src->v.z * oow + s[14];
            dst->win[3] = oow;
         } else {
            dst->win[0] = s[0]  * src->v.x + s[12];
            dst->win[1] = s[5]  * src->v.y + s[13];
            dst->win[2] = s[10] * src->v.z + s[14];
            dst->win[3] = src->v.w;
         }
      } else {
         dst->win[0] = UNVIEWPORT_X( src->v.x );
         dst->win[1] = UNVIEWPORT_Y( src->v.y );
         dst->win[2] = UNVIEWPORT_Z( src->v.z );
         dst->win[3] = src->v.w;
      }

      dst->color[0] = src->v.color.red;
      dst->color[1] = src->v.color.green;
      dst->color[2] = src->v.color.blue;
      dst->color[3] = src->v.color.alpha;

      dst->specular[0] = src->v.specular.red;
      dst->specular[1] = src->v.specular.green;
      dst->specular[2] = src->v.specular.blue;

      dst->fog = src->v.specular.alpha/255.0;

      if (HAVE_PTEX_VERTICES &&
          ((HAVE_TEX2_VERTICES && format == PROJ_TEX3_VERTEX_FORMAT) ||
           (format == PROJ_TEX1_VERTEX_FORMAT))) {

         dst->texcoord[0][0] = src->pv.u0;
         dst->texcoord[0][1] = src->pv.v0;
         dst->texcoord[0][3] = src->pv.q0;

         dst->texcoord[1][0] = src->pv.u1;
         dst->texcoord[1][1] = src->pv.v1;
         dst->texcoord[1][3] = src->pv.q1;

         if (HAVE_TEX2_VERTICES) {
            dst->texcoord[2][0] = src->pv.u2;
            dst->texcoord[2][1] = src->pv.v2;
            dst->texcoord[2][3] = src->pv.q2;
         }

         if (HAVE_TEX3_VERTICES) {
            dst->texcoord[3][0] = src->pv.u3;
            dst->texcoord[3][1] = src->pv.v3;
            dst->texcoord[3][3] = src->pv.q3;
         }
      }
      else {
         dst->texcoord[0][0] = src->v.u0;
         dst->texcoord[0][1] = src->v.v0;
         dst->texcoord[0][3] = 1.0;

         dst->texcoord[1][0] = src->v.u1;
         dst->texcoord[1][1] = src->v.v1;
         dst->texcoord[1][3] = 1.0;

         if (HAVE_TEX2_VERTICES) {
            dst->texcoord[2][0] = src->v.u2;
            dst->texcoord[2][1] = src->v.v2;
            dst->texcoord[2][3] = 1.0;
         }

         if (HAVE_TEX3_VERTICES) {
            dst->texcoord[3][0] = src->v.u3;
            dst->texcoord[3][1] = src->v.v3;
            dst->texcoord[3][3] = 1.0;
         }
      }
   }

   dst->pointSize = ctx->Point._Size;
}



void TAG(print_vertex)( GLcontext *ctx, const VERTEX *v )
{
   LOCALVARS
   GLuint format = GET_VERTEX_FORMAT();

   fprintf(stderr, "(%x) ", format);

   switch (format) {
#if HAVE_TINY_VERTICES
   case TINY_VERTEX_FORMAT:
      fprintf(stderr, "xyz %.4f,%.4f,%.4f rgba %x:%x:%x:%x\n",
              v->v.x, v->v.y, v->v.z,
              v->tv.color.red,
              v->tv.color.green,
              v->tv.color.blue,
              v->tv.color.alpha);
      break;
#endif
#if HAVE_NOTEX_VERTICES
   case NOTEX_VERTEX_FORMAT:
      fprintf(stderr, "xyzw %.4f,%.4f,%.4f,%.4f rgba %x:%x:%x:%x spec %x:%x:%x:%x\n",
              v->v.x, v->v.y, v->v.z, v->v.w,
              v->v.color.red,
              v->v.color.green,
              v->v.color.blue,
              v->v.color.alpha,
              v->v.specular.red,
              v->v.specular.green,
              v->v.specular.blue,
              v->v.specular.alpha);
      break;
#endif
#if HAVE_TEX0_VERTICES
   case TEX0_VERTEX_FORMAT:
      fprintf(stderr, "xyzw %.4f,%.4f,%.4f,%.4f rgba %x:%x:%x:%x st %.4f,%.4f\n",
              v->v.x, v->v.y, v->v.z, v->v.w,
              v->v.color.red,
              v->v.color.green,
              v->v.color.blue,
              v->v.color.alpha,
              v->v.u0,
              v->v.v0);
      break;
#endif
#if HAVE_TEX1_VERTICES
   case TEX1_VERTEX_FORMAT:
      fprintf(stderr, "xyzw %.4f,%.4f,%.4f,%.4f rgba %x:%x:%x:%x st %.4f,%.4f st %.4f,%.4f\n",
              v->v.x, v->v.y, v->v.z, v->v.w,
              v->v.color.red,
              v->v.color.green,
              v->v.color.blue,
              v->v.color.alpha,
              v->v.u0,
              v->v.v0,
              v->v.u1,
              v->v.u2);
      break;
#endif
#if HAVE_PTEX_VERTICES
   case PROJ_TEX1_VERTEX_FORMAT:
      fprintf(stderr, "xyzw %.4f,%.4f,%.4f,%.4f rgba %x:%x:%x:%x stq %.4f,%.4f,%.4f stq %.4f,%.4f,%.4f\n",
              v->v.x, v->v.y, v->v.z, v->v.w,
              v->v.color.red,
              v->v.color.green,
              v->v.color.blue,
              v->v.color.alpha,
              v->pv.u0,
              v->pv.v0,
              v->pv.q0,
              v->pv.u1,
              v->pv.v1,
              v->pv.q1);
      break;
#endif      
   default:
      fprintf(stderr, "???\n");
      break;
   }

   fprintf(stderr, "\n");
}

static void do_import( struct vertex_buffer *VB,
                       struct gl_client_array *to,
                       struct gl_client_array *from )
{
   GLuint count = VB->Count;

   if (!to->Ptr) {
      to->Ptr = ALIGN_MALLOC( VB->Size * 4 * sizeof(GLubyte), 32 );
      to->Type = GL_UNSIGNED_BYTE;
   }

   /* No need to transform the same value 3000 times.
    */
   if (!from->StrideB) {
      to->StrideB = 0;
      count = 1;
   }
   else
      to->StrideB = 4 * sizeof(GLubyte);
   
   _math_trans_4ub( (GLubyte (*)[4]) to->Ptr,
                    from->Ptr,
                    from->StrideB,
                    from->Type,
                    from->Size,
                    0,
                    count);
}

#ifndef IMPORT_QUALIFIER
#define IMPORT_QUALIFIER static
#endif

IMPORT_QUALIFIER void TAG(import_float_colors)( GLcontext *ctx )
{
   LOCALVARS
   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
   struct gl_client_array *to = GET_UBYTE_COLOR_STORE();
   do_import( VB, to, VB->ColorPtr[0] );
   VB->ColorPtr[0] = to;
}

IMPORT_QUALIFIER void TAG(import_float_spec_colors)( GLcontext *ctx )
{
   LOCALVARS
   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
   struct gl_client_array *to = GET_UBYTE_SPEC_COLOR_STORE();
   do_import( VB, to, VB->SecondaryColorPtr[0] );
   VB->SecondaryColorPtr[0] = to;
}

/* Interpolate the elements of the VB not included in typical hardware
 * vertices.  
 *
 * NOTE: All these arrays are guarenteed by tnl to be writeable and
 * have good stride.
 */
#ifndef INTERP_QUALIFIER
#define INTERP_QUALIFIER static
#endif

#define GET_COLOR(ptr, idx) (((GLchan (*)[4])((ptr)->Ptr))[idx])


INTERP_QUALIFIER void TAG(interp_extras)( GLcontext *ctx,
                                          GLfloat t,
                                          GLuint dst, GLuint out, GLuint in,
                                          GLboolean force_boundary )
{
   LOCALVARS
   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

   if (VB->ColorPtr[1]) {
      INTERP_4CHAN( t,
                    GET_COLOR(VB->ColorPtr[1], dst),
                    GET_COLOR(VB->ColorPtr[1], out),
                    GET_COLOR(VB->ColorPtr[1], in) );

      if (VB->SecondaryColorPtr[1]) {
         INTERP_3CHAN( t,
                       GET_COLOR(VB->SecondaryColorPtr[1], dst),
                       GET_COLOR(VB->SecondaryColorPtr[1], out),
                       GET_COLOR(VB->SecondaryColorPtr[1], in) );
      }
   }

   if (VB->EdgeFlag) {
      VB->EdgeFlag[dst] = VB->EdgeFlag[out] || force_boundary;
   }

   INTERP_VERTEX(ctx, t, dst, out, in, force_boundary);
}

INTERP_QUALIFIER void TAG(copy_pv_extras)( GLcontext *ctx,
                                           GLuint dst, GLuint src )
{
   LOCALVARS
      struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

   if (VB->ColorPtr[1]) {
      COPY_CHAN4( GET_COLOR(VB->ColorPtr[1], dst),
                  GET_COLOR(VB->ColorPtr[1], src) );

      if (VB->SecondaryColorPtr[1]) {
         COPY_CHAN4( GET_COLOR(VB->SecondaryColorPtr[1], dst),
                     GET_COLOR(VB->SecondaryColorPtr[1], src) );
      }
   }

   COPY_PV_VERTEX(ctx, dst, src);
}


#undef INTERP_QUALIFIER
#undef IMPORT_QUALIFIER
#undef GET_COLOR

#undef IND
#undef TAG