s3v_tris.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

#define IND (S3V_TWOSIDE_BIT|S3V_UNFILLED_BIT)
#define TAG(x) x##_twoside_unfilled
#include "tnl_dd/t_dd_tritmp.h"

#define IND (S3V_TWOSIDE_BIT|S3V_OFFSET_BIT|S3V_UNFILLED_BIT)
#define TAG(x) x##_twoside_offset_unfilled
#include "tnl_dd/t_dd_tritmp.h"


static void init_render_tab( void )
{
	DEBUG(("*** init_render_tab ***\n"));

	init();
	init_offset();
	init_twoside();
	init_twoside_offset();
	init_unfilled();
	init_offset_unfilled();
	init_twoside_unfilled();
	init_twoside_offset_unfilled();
}


/**********************************************************************/
/*               Render unclipped begin/end objects                   */
/**********************************************************************/

#define VERT(x) (s3vVertex *)(s3vverts + (x << shift))

#define RENDER_POINTS( start, count ) \
	DEBUG(("RENDER_POINTS...(ok)\n")); \
	for ( ; start < count ; start++) \
		vmesa->draw_line( vmesa, VERT(start), VERT(start) )
	/*      vmesa->draw_point( vmesa, VERT(start) ) */

#define RENDER_LINE( v0, v1 ) \
	/* DEBUG(("RENDER_LINE...(ok)\n")); \ */ \
	vmesa->draw_line( vmesa, VERT(v0), VERT(v1) ); \
	DEBUG(("RENDER_LINE...(ok)\n"))

#define RENDER_TRI( v0, v1, v2 )  \
	DEBUG(("RENDER_TRI...(ok)\n")); \
	vmesa->draw_tri( vmesa, VERT(v0), VERT(v1), VERT(v2) )

#define RENDER_QUAD( v0, v1, v2, v3 ) \
	DEBUG(("RENDER_QUAD...(ok)\n")); \
	/* s3v_draw_quad( vmesa, VERT(v0), VERT(v1), VERT(v2),VERT(v3) ) */\
	/* s3v_draw_triangle( vmesa, VERT(v0), VERT(v1), VERT(v2) ); \
	s3v_draw_triangle( vmesa, VERT(v0), VERT(v2), VERT(v3) ) */ \
	vmesa->draw_quad( vmesa, VERT(v0), VERT(v1), VERT(v2), VERT(v3) ) 
	
#define INIT(x) s3vRenderPrimitive( ctx, x );
#undef LOCAL_VARS
#define LOCAL_VARS						\
   s3vContextPtr vmesa = S3V_CONTEXT(ctx);		\
   const GLuint shift = vmesa->vertex_stride_shift;		\
   const char *s3vverts = (char *)vmesa->verts;		\
   const GLboolean stipple = ctx->Line.StippleFlag;		\
   (void) stipple;
#define RESET_STIPPLE	if ( stipple ) s3vResetLineStipple( ctx );
#define RESET_OCCLUSION
#define PRESERVE_VB_DEFS
#define ELT(x) (x)
#define TAG(x) s3v_##x##_verts
#include "tnl_dd/t_dd_rendertmp.h"


/**********************************************************************/
/*                   Render clipped primitives                        */
/**********************************************************************/

static void s3vRenderClippedPoly( GLcontext *ctx, const GLuint *elts, 
				   GLuint n )
{
	s3vContextPtr vmesa = S3V_CONTEXT(ctx);
	struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
	TNLcontext *tnl = TNL_CONTEXT(ctx);
	GLuint prim = vmesa->render_primitive;

	DEBUG(("I AM in: s3vRenderClippedPoly\n"));

	/* Render the new vertices as an unclipped polygon. 
	 */
	if (1)
	{
	GLuint *tmp = VB->Elts;
	VB->Elts = (GLuint *)elts;
	tnl->Driver.Render.PrimTabElts[GL_POLYGON]
		( ctx, 0, n, PRIM_BEGIN|PRIM_END );

	VB->Elts = tmp;
	}

	/* Restore the render primitive
	 */
#if 1
	if (prim != GL_POLYGON) {
		DEBUG(("and prim != GL_POLYGON\n"));
		tnl->Driver.Render.PrimitiveNotify( ctx, prim );
	}
	
#endif
}

static void s3vRenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
{
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   /*tnl->Driver.LineFunc = s3v_line_tab[2];*/ /* _swsetup_Line; */

   DEBUG(("I AM in: s3vRenderClippedLine\n"));
   tnl->Driver.Render.Line( ctx, ii, jj );
}


/**********************************************************************/
/*                    Choose render functions                         */
/**********************************************************************/



#define _S3V_NEW_RENDERSTATE (_DD_NEW_TRI_UNFILLED |		\
			       _DD_NEW_TRI_LIGHT_TWOSIDE |	\
			       _DD_NEW_TRI_OFFSET)

#define ANY_RASTER_FLAGS (DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET|DD_TRI_UNFILLED)

static void s3vChooseRenderState(GLcontext *ctx)
{
   s3vContextPtr vmesa = S3V_CONTEXT(ctx);
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   GLuint flags = ctx->_TriangleCaps;
   GLuint index = 0;

   DEBUG(("s3vChooseRenderState\n"));

   if (flags & ANY_RASTER_FLAGS) {
      if (flags & DD_TRI_LIGHT_TWOSIDE)       index |= S3V_TWOSIDE_BIT;
      if (flags & DD_TRI_OFFSET)	      index |= S3V_OFFSET_BIT;
      if (flags & DD_TRI_UNFILLED)	      index |= S3V_UNFILLED_BIT;
   }

   DEBUG(("vmesa->RenderIndex = %i\n", vmesa->RenderIndex));
   DEBUG(("index = %i\n", index));

   if (vmesa->RenderIndex != index) {
      vmesa->RenderIndex = index;

      tnl->Driver.Render.Points = rast_tab[index].points;
      tnl->Driver.Render.Line = rast_tab[index].line;
      tnl->Driver.Render.Triangle = rast_tab[index].triangle;
      tnl->Driver.Render.Quad = rast_tab[index].quad;

      if (vmesa->RenderIndex == 0)
         tnl->Driver.Render.PrimTabVerts = s3v_render_tab_verts;
      else
         tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
      tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
      tnl->Driver.Render.ClippedLine = s3vRenderClippedLine;
      tnl->Driver.Render.ClippedPolygon = s3vRenderClippedPoly;
   }
}


/**********************************************************************/
/*                 High level hooks for t_vb_render.c                 */
/**********************************************************************/



/* Determine the rasterized primitive when not drawing unfilled 
 * polygons.
 *
 * Used only for the default render stage which always decomposes
 * primitives to trianges/lines/points.  For the accelerated stage,
 * which renders strips as strips, the equivalent calculations are
 * performed in s3v_render.c.
 */

static void s3vRasterPrimitive( GLcontext *ctx, GLuint hwprim )
{
	s3vContextPtr vmesa = S3V_CONTEXT(ctx);
/*	__DRIdrawablePrivate *dPriv = vmesa->driDrawable; */
	GLuint cmd = vmesa->CMD;
	
	unsigned int _hw_prim = hwprim;

	DEBUG(("s3vRasterPrimitive: hwprim = 0x%x ", _hw_prim));

/*	printf("* vmesa->CMD = 0x%x\n", vmesa->CMD); */

	if (vmesa->hw_primitive != _hw_prim)
	{
		DEBUG(("(new one) ***\n"));
		cmd &= ~DO_MASK;
		cmd &= ~ALPHA_BLEND_MASK;
		vmesa->hw_primitive = _hw_prim;

		if (_hw_prim == PrimType_Triangles) {
		/* TRI */
	                DEBUG(("->switching to tri\n"));
			cmd |= (vmesa->_tri[vmesa->_3d_mode] | vmesa->_alpha[vmesa->_3d_mode]);
	        } else if (_hw_prim == PrimType_Lines
			|| _hw_prim == PrimType_Points) {
		/* LINE */
        	        DEBUG(("->switching to line\n"));
			cmd |= (DO_3D_LINE | vmesa->_alpha[0]);
		} else  {
		/* ugh? */
			DEBUG(("->switching to your sis'ass\n"));
		}
        
		DEBUG(("\n"));

		vmesa->restore_primitive = _hw_prim;
		/* 0xacc16827: good value -> lightened newave!!! */
		vmesa->CMD = cmd;
		CMDCHANGE();
	}
}

static void s3vRenderPrimitive( GLcontext *ctx, GLenum prim )
{
	s3vContextPtr vmesa = S3V_CONTEXT(ctx);
	__DRIdrawablePrivate *dPriv = vmesa->driDrawable;
	GLuint cmd = vmesa->CMD;

	unsigned int _hw_prim = hw_prim[prim];

	vmesa->render_primitive = prim;
	vmesa->hw_primitive = _hw_prim;
   
	DEBUG(("s3vRenderPrimitive #%i ", prim));
	DEBUG(("_hw_prim = 0x%x\n", _hw_prim));

/*	printf(" vmesa->CMD = 0x%x\n", vmesa->CMD); */

	if (_hw_prim != vmesa->restore_primitive) {
		DEBUG(("_hw_prim != vmesa->restore_primitive (was 0x%x)\n",
			vmesa->restore_primitive));
#if 1
		cmd &= ~DO_MASK;
		cmd &= ~ALPHA_BLEND_MASK;
/*		
		printf(" cmd = 0x%x\n", cmd);
		printf(" vmesa->_3d_mode=%i; vmesa->_tri[vmesa->_3d_mode]=0x%x\n",
			vmesa->_3d_mode, vmesa->_tri[vmesa->_3d_mode]);
		printf("vmesa->alpha[0] = 0x%x; vmesa->alpha[1] = 0x%x\n",
			vmesa->_alpha[0], vmesa->_alpha[1]);
*/		
	   	if (_hw_prim == PrimType_Triangles) { /* TRI */
			DEBUG(("->switching to tri\n"));
   			cmd |= (vmesa->_tri[vmesa->_3d_mode] | vmesa->_alpha[vmesa->_3d_mode]);
			DEBUG(("vmesa->TexStride = %i\n", vmesa->TexStride));
			DEBUG(("vmesa->TexOffset = %i\n", vmesa->TexOffset));
			DMAOUT_CHECK(3DTRI_Z_BASE, 12);
		} else { /* LINE */
			DEBUG(("->switching to line\n"));
			cmd |= (DO_3D_LINE | vmesa->_alpha[0]);
			DMAOUT_CHECK(3DLINE_Z_BASE, 12);
		}

		DMAOUT(vmesa->s3vScreen->depthOffset & 0x003FFFF8);
		DMAOUT(vmesa->DestBase);
		/* DMAOUT(vmesa->ScissorLR); */
		/* DMAOUT(vmesa->ScissorTB); */

		/* NOTE: we need to restore all these values since we
		 * are coming back from a vmesa->restore_primitive */
		DMAOUT( (0 << 16) | (dPriv->w-1) );
		DMAOUT( (0 << 16) | (dPriv->h-1) );
		DMAOUT( (vmesa->SrcStride << 16) | vmesa->TexStride );
		DMAOUT(vmesa->SrcStride);
		DMAOUT(vmesa->TexOffset);
		DMAOUT(vmesa->TextureBorderColor);
		DMAOUT(0); /* FOG */
		DMAOUT(0);
		DMAOUT(0);
	        DMAOUT(cmd);
		/* 0xacc16827: good value -> lightened newave!!! */
        DMAFINISH();

	vmesa->CMD = cmd;
#endif
	}

	DEBUG(("\n"));

	vmesa->restore_primitive = _hw_prim;
}

static void s3vRunPipeline( GLcontext *ctx )
{
	s3vContextPtr vmesa = S3V_CONTEXT(ctx);

	DEBUG(("*** s3vRunPipeline ***\n"));

	if ( vmesa->new_state )
		s3vDDUpdateHWState( ctx );

	if (vmesa->new_gl_state) {

		if (vmesa->new_gl_state & _NEW_TEXTURE) {
			s3vUpdateTextureState( ctx );
		}

		if (!vmesa->Fallback) {
			if (vmesa->new_gl_state & _S3V_NEW_VERTEX)
				s3vChooseVertexState( ctx );
      
			if (vmesa->new_gl_state & _S3V_NEW_RASTER_STATE)
				s3vChooseRasterState( ctx );
      
			if (vmesa->new_gl_state & _S3V_NEW_RENDERSTATE)
				s3vChooseRenderState( ctx );
		}

	vmesa->new_gl_state = 0;
	
	}

	_tnl_run_pipeline( ctx );
}

static void s3vRenderStart( GLcontext *ctx )
{
	/* Check for projective texturing.  Make sure all texcoord
	 * pointers point to something.  (fix in mesa?)  
	 */

	DEBUG(("s3vRenderStart\n"));
	/* s3vCheckTexSizes( ctx ); */
}

static void s3vRenderFinish( GLcontext *ctx )
{
   if (0)
      _swrast_flush( ctx );	/* never needed */
}

static void s3vResetLineStipple( GLcontext *ctx )
{
/*   s3vContextPtr vmesa = S3V_CONTEXT(ctx); */

   /* Reset the hardware stipple counter.
    */
/*
   CHECK_DMA_BUFFER(vmesa, 1);
   WRITE(vmesa->buf, UpdateLineStippleCounters, 0);
*/
}


/**********************************************************************/
/*           Transition to/from hardware rasterization.               */
/**********************************************************************/


void s3vFallback( s3vContextPtr vmesa, GLuint bit, GLboolean mode )
{
   GLcontext *ctx = vmesa->glCtx;
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   GLuint oldfallback = vmesa->Fallback;

   DEBUG(("*** s3vFallback: "));

   if (mode) {
      vmesa->Fallback |= bit;
      if (oldfallback == 0) {
		 DEBUG(("oldfallback == 0 ***\n"));
		 _swsetup_Wakeup( ctx );
		 _tnl_need_projected_coords( ctx, GL_TRUE );
		 vmesa->RenderIndex = ~0;
      }
   }
   else {
      DEBUG(("***\n"));
      vmesa->Fallback &= ~bit;
      if (oldfallback == bit) {
	 	_swrast_flush( ctx );
	 	tnl->Driver.Render.Start = s3vRenderStart;
	 	tnl->Driver.Render.PrimitiveNotify = s3vRenderPrimitive;
	 	tnl->Driver.Render.Finish = s3vRenderFinish;
	 	tnl->Driver.Render.BuildVertices = s3vBuildVertices;
   		tnl->Driver.Render.ResetLineStipple = s3vResetLineStipple;
	 	vmesa->new_gl_state |= (_S3V_NEW_RENDERSTATE|
					_S3V_NEW_RASTER_STATE|
					_S3V_NEW_VERTEX);
      }
   }
}


/**********************************************************************/
/*                            Initialization.                         */
/**********************************************************************/


void s3vInitTriFuncs( GLcontext *ctx )
{
   s3vContextPtr vmesa = S3V_CONTEXT(ctx);
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   static int firsttime = 1;

   if (firsttime) {
      init_rast_tab();
      init_render_tab();
      firsttime = 0;
   }
   
   vmesa->RenderIndex = ~0;

   tnl->Driver.RunPipeline = s3vRunPipeline;
   tnl->Driver.Render.Start = s3vRenderStart;
   tnl->Driver.Render.Finish = s3vRenderFinish; 
   tnl->Driver.Render.PrimitiveNotify = s3vRenderPrimitive;
   tnl->Driver.Render.ResetLineStipple = s3vResetLineStipple;
/*
   tnl->Driver.RenderInterp = _swsetup_RenderInterp;
   tnl->Driver.RenderCopyPV = _swsetup_RenderCopyPV;
*/
   tnl->Driver.Render.BuildVertices = s3vBuildVertices;
}