/*
 * 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( struct gl_context *ctx, GLuint edst, GLuint esrc )
{
   LOCALVARS   
   GLubyte *verts = GET_VERTEX_STORE();
   GLuint size = GET_VERTEX_SIZE();
   GLuint *dst = (GLuint *)(verts + (edst * size));
   GLuint *src = (GLuint *)(verts + (esrc * size));
   dst[4] = src[4];
   dst[5] = src[5];
}

static void copy_pv_rgba4( struct gl_context *ctx, GLuint edst, GLuint esrc )
{
   LOCALVARS
   GLubyte *verts = GET_VERTEX_STORE();
   GLuint size = GET_VERTEX_SIZE();
   GLuint *dst = (GLuint *)(verts + (edst * size));
   GLuint *src = (GLuint *)(verts + (esrc * size));
   dst[4] = src[4];
}

static void copy_pv_rgba3( struct gl_context *ctx, GLuint edst, GLuint esrc )
{
   LOCALVARS
   GLubyte *verts = GET_VERTEX_STORE();
   GLuint size = GET_VERTEX_SIZE();
   GLuint *dst = (GLuint *)(verts + (edst * size));
   GLuint *src = (GLuint *)(verts + (esrc * size));
   dst[3] = src[3];
}


void TAG(translate_vertex)(struct gl_context *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->attrib[FRAG_ATTRIB_WPOS][0] = s[0]  * src->v.x + s[12];
	 dst->attrib[FRAG_ATTRIB_WPOS][1] = s[5]  * src->v.y + s[13];
	 dst->attrib[FRAG_ATTRIB_WPOS][2] = s[10] * src->v.z + s[14];
	 dst->attrib[FRAG_ATTRIB_WPOS][3] = 1.0;
      } else {
	 dst->attrib[FRAG_ATTRIB_WPOS][0] = UNVIEWPORT_X( src->v.x );
	 dst->attrib[FRAG_ATTRIB_WPOS][1] = UNVIEWPORT_Y( src->v.y );
	 dst->attrib[FRAG_ATTRIB_WPOS][2] = UNVIEWPORT_Z( src->v.z );
	 dst->attrib[FRAG_ATTRIB_WPOS][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->attrib[FRAG_ATTRIB_WPOS][0] = s[0]  * src->v.x * oow + s[12];
	    dst->attrib[FRAG_ATTRIB_WPOS][1] = s[5]  * src->v.y * oow + s[13];
	    dst->attrib[FRAG_ATTRIB_WPOS][2] = s[10] * src->v.z * oow + s[14];
	    dst->attrib[FRAG_ATTRIB_WPOS][3] = oow;
	 } else {
	    dst->attrib[FRAG_ATTRIB_WPOS][0] = s[0]  * src->v.x + s[12];
	    dst->attrib[FRAG_ATTRIB_WPOS][1] = s[5]  * src->v.y + s[13];
	    dst->attrib[FRAG_ATTRIB_WPOS][2] = s[10] * src->v.z + s[14];
	    dst->attrib[FRAG_ATTRIB_WPOS][3] = src->v.w;
	 }
      } else {
	 dst->attrib[FRAG_ATTRIB_WPOS][0] = UNVIEWPORT_X( src->v.x );
	 dst->attrib[FRAG_ATTRIB_WPOS][1] = UNVIEWPORT_Y( src->v.y );
	 dst->attrib[FRAG_ATTRIB_WPOS][2] = UNVIEWPORT_Z( src->v.z );
	 dst->attrib[FRAG_ATTRIB_WPOS][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->attrib[FRAG_ATTRIB_COL1][0] = UBYTE_TO_FLOAT(src->v.specular.red);
      dst->attrib[FRAG_ATTRIB_COL1][1] = UBYTE_TO_FLOAT(src->v.specular.green);
      dst->attrib[FRAG_ATTRIB_COL1][2] = UBYTE_TO_FLOAT(src->v.specular.blue);

      dst->attrib[FRAG_ATTRIB_FOGC][0] = UBYTE_TO_FLOAT(src->v.specular.alpha);

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

	 dst->attrib[FRAG_ATTRIB_TEX0][0] = src->pv.u0;
	 dst->attrib[FRAG_ATTRIB_TEX0][1] = src->pv.v0;
	 dst->attrib[FRAG_ATTRIB_TEX0][3] = src->pv.q0;

	 dst->attrib[FRAG_ATTRIB_TEX1][0] = src->pv.u1;
	 dst->attrib[FRAG_ATTRIB_TEX1][1] = src->pv.v1;
	 dst->attrib[FRAG_ATTRIB_TEX1][3] = src->pv.q1;

	 if (HAVE_TEX2_VERTICES) {
	    dst->attrib[FRAG_ATTRIB_TEX2][0] = src->pv.u2;
	    dst->attrib[FRAG_ATTRIB_TEX2][1] = src->pv.v2;
	    dst->attrib[FRAG_ATTRIB_TEX2][3] = src->pv.q2;
	 }

	 if (HAVE_TEX3_VERTICES) {
	    dst->attrib[FRAG_ATTRIB_TEX3][0] = src->pv.u3;
	    dst->attrib[FRAG_ATTRIB_TEX3][1] = src->pv.v3;
	    dst->attrib[FRAG_ATTRIB_TEX3][3] = src->pv.q3;
	 }
      }
      else {
	 dst->attrib[FRAG_ATTRIB_TEX0][0] = src->v.u0;
	 dst->attrib[FRAG_ATTRIB_TEX0][1] = src->v.v0;
	 dst->attrib[FRAG_ATTRIB_TEX0][3] = 1.0;

	 dst->attrib[FRAG_ATTRIB_TEX1][0] = src->v.u1;
	 dst->attrib[FRAG_ATTRIB_TEX1][1] = src->v.v1;
	 dst->attrib[FRAG_ATTRIB_TEX1][3] = 1.0;

	 if (HAVE_TEX2_VERTICES) {
	    dst->attrib[FRAG_ATTRIB_TEX2][0] = src->v.u2;
	    dst->attrib[FRAG_ATTRIB_TEX2][1] = src->v.v2;
	    dst->attrib[FRAG_ATTRIB_TEX2][3] = 1.0;
	 }

	 if (HAVE_TEX3_VERTICES) {
	    dst->attrib[FRAG_ATTRIB_TEX3][0] = src->v.u3;
	    dst->attrib[FRAG_ATTRIB_TEX3][1] = src->v.v3;
	    dst->attrib[FRAG_ATTRIB_TEX3][3] = 1.0;
	 }
      }
   }

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


/* prototype to silence warning */
void TAG(print_vertex)( struct gl_context *ctx, const VERTEX *v );


void TAG(print_vertex)( struct gl_context *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");
}



/* 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) ((ptr)->data[idx])


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

   if (VB->BackfaceColorPtr) {
      assert(VB->BackfaceColorPtr->stride == 4 * sizeof(GLfloat));

      INTERP_4F( t,
		    GET_COLOR(VB->BackfaceColorPtr, dst),
		    GET_COLOR(VB->BackfaceColorPtr, out),
		    GET_COLOR(VB->BackfaceColorPtr, in) );

      if (VB->BackfaceSecondaryColorPtr) {
	 INTERP_3F( t,
		       GET_COLOR(VB->BackfaceSecondaryColorPtr, dst),
		       GET_COLOR(VB->BackfaceSecondaryColorPtr, out),
		       GET_COLOR(VB->BackfaceSecondaryColorPtr, 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)( struct gl_context *ctx, 
					   GLuint dst, GLuint src )
{
   LOCALVARS
      struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

   if (VB->BackfaceColorPtr) {
      COPY_4FV( GET_COLOR(VB->BackfaceColorPtr, dst),
		GET_COLOR(VB->BackfaceColorPtr, src) );

      if (VB->BackfaceSecondaryColorPtr) {
	 COPY_4FV( GET_COLOR(VB->BackfaceSecondaryColorPtr, dst),
		   GET_COLOR(VB->BackfaceSecondaryColorPtr, src) );
      }
   }

   COPY_PV_VERTEX(ctx, dst, src);
}


#undef INTERP_QUALIFIER
#undef GET_COLOR

#undef IND
#undef TAG