/* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_pipeline.c,v 1.4 2001/01/08 01:07:21 martin Exp $ */
/**************************************************************************

Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
                                               Cedar Park, Texas.
All Rights Reserved.

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copy of this software and associated documentation files (the "Software"),
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The above copyright notice and this permission notice (including the next
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**************************************************************************/

/*
 * Authors:
 *   Kevin E. Martin <martin@valinux.com>
 *   Gareth Hughes <gareth@valinux.com>
 *
 */

#include "r128_context.h"
#include "r128_vb.h"
#include "r128_pipeline.h"

#include "types.h"
#include "fog.h"

static struct gl_pipeline_stage r128_fast_stage = {
   "r128 Fast Path",
   (PIPE_OP_VERT_XFORM |
    PIPE_OP_RAST_SETUP_0 |
    PIPE_OP_RAST_SETUP_1 |
    PIPE_OP_RENDER),
   PIPE_PRECALC,
   0, 0, 0, 0, 0, 0, 0, 0, 0,
   r128DDFastPath
};

#define ILLEGAL_ENABLES (TEXTURE0_3D |		\
			 TEXTURE1_3D |		\
			 ENABLE_TEXMAT0 |	\
			 ENABLE_TEXMAT1 |	\
			 ENABLE_TEXGEN0 |	\
			 ENABLE_TEXGEN1 |	\
			 ENABLE_USERCLIP |	\
			 ENABLE_LIGHT |		\
			 ENABLE_FOG)

/* Build the PRECALC pipeline with our stage, if possible.  Otherwise,
 * return GL_FALSE.
 */
GLboolean r128DDBuildPrecalcPipeline( GLcontext *ctx )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   struct gl_pipeline *pipe = &ctx->CVA.pre;

   if ( rmesa->RenderIndex == 0 &&
	(ctx->Enabled & ILLEGAL_ENABLES) == 0 &&
	(ctx->Array.Flags & (VERT_OBJ_234 |
			     VERT_TEX0_4  |
			     VERT_TEX1_4  |
			     VERT_ELT)) == (VERT_OBJ_23 | VERT_ELT) )
   {
      pipe->stages[0]  = &r128_fast_stage;
      pipe->stages[1]  = 0;
      pipe->new_inputs = ctx->RenderFlags & VERT_DATA;
      pipe->ops        = pipe->stages[0]->ops;

      rmesa->OnFastPath = GL_TRUE;
      return GL_TRUE;
   }

   if ( rmesa->OnFastPath ) {
      rmesa->OnFastPath = GL_FALSE;

      ctx->CVA.VB->ClipOrMask = 0;
      ctx->CVA.VB->ClipAndMask = CLIP_ALL_BITS;
      ctx->Array.NewArrayState |= ctx->Array.Summary;
   }

   return GL_FALSE;
}


/* Still do the normal fixup and copy-to-current, so this isn't so
 * bad.
 */
#define ILLEGAL_INPUTS_IMM (VERT_OBJ_4 |	\
                            VERT_TEX0_4 |	\
			    VERT_TEX1_4 |	\
			    VERT_MATERIAL)

static void r128DDCheckRasterSetup( GLcontext *ctx,
				    struct gl_pipeline_stage *d )
{
   d->type = PIPE_IMMEDIATE | PIPE_PRECALC;
   d->inputs = ctx->RenderFlags;

   /* r128 requires an extra input:
    */
   if ( ctx->FogMode == FOG_FRAGMENT )
      d->inputs |= VERT_FOG_COORD;

   d->outputs = VERT_SETUP_FULL;

   if ( ctx->IndirectTriangles & DD_SW_SETUP )
      d->type = PIPE_IMMEDIATE;
}


GLuint r128DDRegisterPipelineStages( struct gl_pipeline_stage *out,
				     const struct gl_pipeline_stage *in,
				     GLuint nr )
{
   int i, o;

   for ( i = o = 0 ; i < nr ; i++ ) {
      switch ( in[i].ops ) {
	 /* Completely replace Mesa's fog processing to generate fog
	  * coordinates instead of messing with colors.
	  */
      case PIPE_OP_FOG:
	 out[o] = gl_fog_coord_stage;
	 o++;
	 break;

      case PIPE_OP_RAST_SETUP_0:
	 out[o] = in[i];
	 out[o].cva_state_change = (NEW_LIGHTING |
				    NEW_TEXTURING |
				    NEW_RASTER_OPS);
	 out[o].state_change = ~0;
	 out[o].check = r128DDCheckPartialRasterSetup;
	 out[o].run = r128DDPartialRasterSetup;
	 o++;
	 break;

      case PIPE_OP_RAST_SETUP_0 | PIPE_OP_RAST_SETUP_1:
	 out[o] = in[i];
	 out[o].check = r128DDCheckRasterSetup;
	 out[o].run = r128DDDoRasterSetup;
	 o++;
	 break;

      default:
	 out[o++] = in[i];
	 break;
      }
   }

   return o;
}