/*
 * GLX Hardware Device Driver for Intel i810
 * Copyright (C) 1999 Keith Whitwell
 *
 * 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
 * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS 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.
 *
 *
 */
/* $XFree86: xc/lib/GL/mesa/src/drv/i810/i810tris.c,v 1.5 2000/09/24 13:51:04 alanh Exp $ */

#include <stdio.h>
#include <math.h>

#include "types.h"
#include "vb.h"
#include "pipeline.h"

#include "mm.h"
#include "i810tris.h"
#include "i810vb.h"
#include "i810log.h"

/* Used in i810tritmp.h
 */
#define I810_COLOR(to, from) {			\
  (to)[0] = (from)[2];				\
  (to)[1] = (from)[1];				\
  (to)[2] = (from)[0];				\
  (to)[3] = (from)[3];				\
}

static triangle_func tri_tab[0x10];   
static quad_func     quad_tab[0x10];  
static line_func     line_tab[0x10];  
static points_func   points_tab[0x10];

#define IND (0)
#define TAG(x) x
#include "i810tritmp.h"

#define IND (I810_FLAT_BIT)
#define TAG(x) x##_flat
#include "i810tritmp.h"

#define IND (I810_OFFSET_BIT)	
#define TAG(x) x##_offset
#include "i810tritmp.h"

#define IND (I810_OFFSET_BIT|I810_FLAT_BIT) 
#define TAG(x) x##_offset_flat
#include "i810tritmp.h"

#define IND (I810_TWOSIDE_BIT)	
#define TAG(x) x##_twoside
#include "i810tritmp.h"

#define IND (I810_TWOSIDE_BIT|I810_FLAT_BIT) 
#define TAG(x) x##_twoside_flat
#include "i810tritmp.h"

#define IND (I810_TWOSIDE_BIT|I810_OFFSET_BIT) 
#define TAG(x) x##_twoside_offset
#include "i810tritmp.h"

#define IND (I810_TWOSIDE_BIT|I810_OFFSET_BIT|I810_FLAT_BIT) 
#define TAG(x) x##_twoside_offset_flat
#include "i810tritmp.h"



void i810DDTrifuncInit()
{
   init();
   init_flat();
   init_offset();
   init_offset_flat();
   init_twoside();
   init_twoside_flat();
   init_twoside_offset();
   init_twoside_offset_flat();
}



#define ALL_FALLBACK (DD_MULTIDRAW | DD_SELECT | DD_FEEDBACK | DD_STENCIL)
#define POINT_FALLBACK (ALL_FALLBACK)
#define LINE_FALLBACK (ALL_FALLBACK | DD_LINE_STIPPLE)
#define TRI_FALLBACK (ALL_FALLBACK | DD_TRI_UNFILLED)
#define ANY_FALLBACK (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK|DD_TRI_STIPPLE)
#define ANY_RASTER_FLAGS (DD_FLATSHADE|DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET)

void i810DDChooseRenderState(GLcontext *ctx)
{
    i810ContextPtr imesa = I810_CONTEXT(ctx);
    GLuint         flags   = ctx->TriangleCaps;
    CARD32 index    = 0;

    if (imesa->Fallback) {
	imesa->renderindex = I810_FALLBACK_BIT;
	return;
    }
    
    if (flags & ANY_RASTER_FLAGS) {
	if (flags & DD_FLATSHADE)               index |= I810_FLAT_BIT;
	if (flags & DD_TRI_LIGHT_TWOSIDE)       index |= I810_TWOSIDE_BIT;
	if (flags & DD_TRI_OFFSET)              index |= I810_OFFSET_BIT; 
    }
	
    imesa->PointsFunc = points_tab[index];
    imesa->LineFunc = line_tab[index];
    imesa->TriangleFunc = tri_tab[index];
    imesa->QuadFunc = quad_tab[index];
    imesa->renderindex = index;
    imesa->IndirectTriangles = 0;

    if (flags & ANY_FALLBACK) {
	if (flags & POINT_FALLBACK) {
	    imesa->renderindex |= I810_FALLBACK_BIT;
	    imesa->PointsFunc = 0;
	    imesa->IndirectTriangles |= DD_POINT_SW_RASTERIZE;
	}
	    
	if (flags & LINE_FALLBACK) {
	    imesa->renderindex |= I810_FALLBACK_BIT;
	    imesa->LineFunc = 0;
	    imesa->IndirectTriangles |= DD_LINE_SW_RASTERIZE;
	}

	if (flags & TRI_FALLBACK) {
	    imesa->renderindex |= I810_FALLBACK_BIT;
	    imesa->TriangleFunc = 0;
	    imesa->QuadFunc = 0;
	    imesa->IndirectTriangles |= (DD_TRI_SW_RASTERIZE |
					 DD_QUAD_SW_RASTERIZE);
	}
	/* Special cases:
	 */
	if ((flags & DD_TRI_STIPPLE) &&
	    (ctx->IndirectTriangles & DD_TRI_STIPPLE)) {
	    imesa->renderindex |= I810_FALLBACK_BIT;
	    imesa->TriangleFunc = 0;
	    imesa->QuadFunc = 0;
	    imesa->IndirectTriangles |= (DD_TRI_SW_RASTERIZE |
					 DD_QUAD_SW_RASTERIZE);
	}
    }
}