intel_tris.c

mesa-6.5-minigui源码

static void init_rast_tab( void )
{
   init();
   init_offset();
   init_twoside();
   init_twoside_offset();
   init_unfilled();
   init_offset_unfilled();
   init_twoside_unfilled();
   init_twoside_offset_unfilled();
   init_fallback();
   init_offset_fallback();
   init_twoside_fallback();
   init_twoside_offset_fallback();
   init_unfilled_fallback();
   init_offset_unfilled_fallback();
   init_twoside_unfilled_fallback();
   init_twoside_offset_unfilled_fallback();
}


/***********************************************************************
 *                    Rasterization fallback helpers                   *
 ***********************************************************************/


/* This code is hit only when a mix of accelerated and unaccelerated
 * primitives are being drawn, and only for the unaccelerated
 * primitives.
 */
static void
intel_fallback_tri( struct intel_context *intel,
		   intelVertex *v0,
		   intelVertex *v1,
		   intelVertex *v2 )
{
   GLcontext *ctx = &intel->ctx;
   SWvertex v[3];

   if (0)
      fprintf(stderr, "\n%s\n", __FUNCTION__);
   
   if (intel->prim.flush)
      intel->prim.flush(intel);

   _swsetup_Translate( ctx, v0, &v[0] );
   _swsetup_Translate( ctx, v1, &v[1] );
   _swsetup_Translate( ctx, v2, &v[2] );
   intelSpanRenderStart( ctx );
   _swrast_Triangle( ctx, &v[0], &v[1], &v[2] );
   intelSpanRenderFinish( ctx );
}


static void
intel_fallback_line( struct intel_context *intel,
		    intelVertex *v0,
		    intelVertex *v1 )
{
   GLcontext *ctx = &intel->ctx;
   SWvertex v[2];

   if (0)
      fprintf(stderr, "\n%s\n", __FUNCTION__);

   if (intel->prim.flush)
      intel->prim.flush(intel);

   _swsetup_Translate( ctx, v0, &v[0] );
   _swsetup_Translate( ctx, v1, &v[1] );
   intelSpanRenderStart( ctx );
   _swrast_Line( ctx, &v[0], &v[1] );
   intelSpanRenderFinish( ctx );
}


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

#define IND 0
#define V(x) (intelVertex *)(vertptr + ((x)*vertsize*sizeof(GLuint)))
#define RENDER_POINTS( start, count )	\
   for ( ; start < count ; start++) POINT( V(ELT(start)) );
#define RENDER_LINE( v0, v1 )         LINE( V(v0), V(v1) )
#define RENDER_TRI(  v0, v1, v2 )     TRI(  V(v0), V(v1), V(v2) )
#define RENDER_QUAD( v0, v1, v2, v3 ) QUAD( V(v0), V(v1), V(v2), V(v3) )
#define INIT(x) intelRenderPrimitive( ctx, x )
#undef LOCAL_VARS
#define LOCAL_VARS						\
    struct intel_context *intel = intel_context(ctx);			\
    GLubyte *vertptr = (GLubyte *)intel->verts;			\
    const GLuint vertsize = intel->vertex_size;       	\
    const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;	\
    (void) elt;
#define RESET_STIPPLE
#define RESET_OCCLUSION
#define PRESERVE_VB_DEFS
#define ELT(x) x
#define TAG(x) intel_##x##_verts
#include "tnl/t_vb_rendertmp.h"
#undef ELT
#undef TAG
#define TAG(x) intel_##x##_elts
#define ELT(x) elt[x]
#include "tnl/t_vb_rendertmp.h"

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



static void intelRenderClippedPoly( GLcontext *ctx, const GLuint *elts,
				   GLuint n )
{
   struct intel_context *intel = intel_context(ctx);
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
   GLuint prim = intel->render_primitive;

   /* Render the new vertices as an unclipped polygon.
    */
   {
      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 (prim != GL_POLYGON)
      tnl->Driver.Render.PrimitiveNotify( ctx, prim );
}

static void intelRenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
{
   TNLcontext *tnl = TNL_CONTEXT(ctx);

   tnl->Driver.Render.Line( ctx, ii, jj );
}

static void intelFastRenderClippedPoly( GLcontext *ctx, const GLuint *elts,
				       GLuint n )
{
   struct intel_context *intel = intel_context( ctx );
   const GLuint vertsize = intel->vertex_size;
   GLuint *vb = intelExtendInlinePrimitive( intel, (n-2) * 3 * vertsize );
   GLubyte *vertptr = (GLubyte *)intel->verts;
   const GLuint *start = (const GLuint *)V(elts[0]);
   int i,j;

   for (i = 2 ; i < n ; i++) {
      COPY_DWORDS( j, vb, vertsize, V(elts[i-1]) );
      COPY_DWORDS( j, vb, vertsize, V(elts[i]) );
      COPY_DWORDS( j, vb, vertsize, start );
   }
}

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




#define ANY_FALLBACK_FLAGS (DD_LINE_STIPPLE | DD_TRI_STIPPLE | DD_POINT_ATTEN)
#define ANY_RASTER_FLAGS (DD_TRI_LIGHT_TWOSIDE | DD_TRI_OFFSET | DD_TRI_UNFILLED)

void intelChooseRenderState(GLcontext *ctx)
{
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   struct intel_context *intel = intel_context(ctx);
   GLuint flags = ctx->_TriangleCaps;
   struct fragment_program *fprog = ctx->FragmentProgram._Current;
   GLboolean have_wpos = (fprog && (fprog->Base.InputsRead & FRAG_BIT_WPOS));
   GLuint index = 0;

   if (INTEL_DEBUG & DEBUG_STATE)
     fprintf(stderr,"\n%s\n",__FUNCTION__);

   if ((flags & (ANY_FALLBACK_FLAGS|ANY_RASTER_FLAGS)) || have_wpos) {

      if (flags & ANY_RASTER_FLAGS) {
	 if (flags & DD_TRI_LIGHT_TWOSIDE)    index |= INTEL_TWOSIDE_BIT;
	 if (flags & DD_TRI_OFFSET)	      index |= INTEL_OFFSET_BIT;
	 if (flags & DD_TRI_UNFILLED)	      index |= INTEL_UNFILLED_BIT;
      }

      if (have_wpos) {
	 intel->draw_point = intel_wpos_point;
	 intel->draw_line = intel_wpos_line;
	 intel->draw_tri = intel_wpos_triangle;

	 /* Make sure these get called:
	  */
	 index |= INTEL_FALLBACK_BIT;
      }
      else {
	 intel->draw_point = intel_draw_point;
	 intel->draw_line = intel_draw_line;
	 intel->draw_tri = intel_draw_triangle;
      }

      /* Hook in fallbacks for specific primitives.
       */
      if (flags & ANY_FALLBACK_FLAGS)
      {
	 if (flags & DD_LINE_STIPPLE)
	    intel->draw_line = intel_fallback_line;

	 if ((flags & DD_TRI_STIPPLE) && !intel->hw_stipple) 
	    intel->draw_tri = intel_fallback_tri;

	 if (flags & DD_POINT_ATTEN)
	    intel->draw_point = intel_atten_point;

	 index |= INTEL_FALLBACK_BIT;
      }
   }

   if (intel->RenderIndex != index) {
      intel->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 (index == 0) {
	 tnl->Driver.Render.PrimTabVerts = intel_render_tab_verts;
	 tnl->Driver.Render.PrimTabElts = intel_render_tab_elts;
	 tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
	 tnl->Driver.Render.ClippedPolygon = intelFastRenderClippedPoly;
      } else {
	 tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
	 tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
	 tnl->Driver.Render.ClippedLine = intelRenderClippedLine;
	 tnl->Driver.Render.ClippedPolygon = intelRenderClippedPoly;
      }
   }
}

static const GLenum reduced_prim[GL_POLYGON+1] = {
   GL_POINTS,
   GL_LINES,
   GL_LINES,
   GL_LINES,
   GL_TRIANGLES,
   GL_TRIANGLES,
   GL_TRIANGLES,
   GL_TRIANGLES,
   GL_TRIANGLES,
   GL_TRIANGLES
};


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




static void intelRunPipeline( GLcontext *ctx )
{
   struct intel_context *intel = intel_context(ctx);

   if (intel->NewGLState) {
      if (intel->NewGLState & _NEW_TEXTURE) {
	 intel->vtbl.update_texture_state( intel ); 
      }

      if (!intel->Fallback) {
	 if (intel->NewGLState & _INTEL_NEW_RENDERSTATE)
	    intelChooseRenderState( ctx );
      }

      intel->NewGLState = 0;
   }

   _tnl_run_pipeline( ctx );
}

static void intelRenderStart( GLcontext *ctx )
{
   struct intel_context *intel = intel_context(ctx);

   intel->vtbl.render_start( intel_context(ctx) );
   intel->vtbl.emit_state( intel );
}

static void intelRenderFinish( GLcontext *ctx )
{
   struct intel_context *intel = intel_context(ctx);

   if (intel->RenderIndex & INTEL_FALLBACK_BIT)
      _swrast_flush( ctx );

   if (intel->prim.flush)
      intel->prim.flush(intel);
}




 /* System to flush dma and emit state changes based on the rasterized
  * primitive.
  */
static void intelRasterPrimitive( GLcontext *ctx, GLenum rprim, GLuint hwprim )
{
   struct intel_context *intel = intel_context(ctx);

   if (0)
      fprintf(stderr, "%s %s %x\n", __FUNCTION__, 
	      _mesa_lookup_enum_by_nr(rprim), hwprim);

   intel->vtbl.reduced_primitive_state( intel, rprim );
    
   /* Start a new primitive.  Arrange to have it flushed later on.
    */
   if (hwprim != intel->prim.primitive) {
      if (intel->prim.flush)
	 intel->prim.flush(intel);

      intelStartInlinePrimitive( intel, hwprim, INTEL_BATCH_CLIPRECTS );
   }
}


 /* 
  */
static void intelRenderPrimitive( GLcontext *ctx, GLenum prim )
{
   struct intel_context *intel = intel_context(ctx);

   if (0)
      fprintf(stderr, "%s %s\n", __FUNCTION__, _mesa_lookup_enum_by_nr(prim));

   /* Let some clipping routines know which primitive they're dealing
    * with.
    */
   intel->render_primitive = prim;

   /* Shortcircuit this when called from t_dd_rendertmp.h for unfilled
    * triangles.  The rasterized primitive will always be reset by
    * lower level functions in that case, potentially pingponging the
    * state:
    */
   if (reduced_prim[prim] == GL_TRIANGLES && 
       (ctx->_TriangleCaps & DD_TRI_UNFILLED))
      return;

   /* Set some primitive-dependent state and Start? a new primitive.
    */
   intelRasterPrimitive( ctx, reduced_prim[prim], hw_prim[prim] );
}


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

static char *fallbackStrings[] = {
   "Texture",
   "Draw buffer",
   "Read buffer",
   "Color mask",
   "Render mode",
   "Stencil",
   "Stipple",
   "User disable"
};


static char *getFallbackString(GLuint bit)
{
   int i = 0;
   while (bit > 1) {
      i++;
      bit >>= 1;
   }
   return fallbackStrings[i];
}



void intelFallback( struct intel_context *intel, GLuint bit, GLboolean mode )
{
   GLcontext *ctx = &intel->ctx;
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   GLuint oldfallback = intel->Fallback;

   if (mode) {
      intel->Fallback |= bit;
      if (oldfallback == 0) {
	 intelFlush(ctx);
	 if (INTEL_DEBUG & DEBUG_FALLBACKS) 
	    fprintf(stderr, "ENTER FALLBACK %x: %s\n",
		    bit, getFallbackString( bit ));
	 _swsetup_Wakeup( ctx );
	 intel->RenderIndex = ~0;
      }
   }
   else {
      intel->Fallback &= ~bit;
      if (oldfallback == bit) {
	 _swrast_flush( ctx );
	 if (INTEL_DEBUG & DEBUG_FALLBACKS) 
	    fprintf(stderr, "LEAVE FALLBACK %s\n", getFallbackString( bit ));
	 tnl->Driver.Render.Start = intelRenderStart;
	 tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
	 tnl->Driver.Render.Finish = intelRenderFinish;
	 tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
	 tnl->Driver.Render.CopyPV = _tnl_copy_pv;
	 tnl->Driver.Render.Interp = _tnl_interp;

	 _tnl_invalidate_vertex_state( ctx, ~0 );
	 _tnl_invalidate_vertices( ctx, ~0 );
	 _tnl_install_attrs( ctx, 
			     intel->vertex_attrs, 
			     intel->vertex_attr_count,
			     intel->ViewportMatrix.m, 0 ); 

	 intel->NewGLState |= _INTEL_NEW_RENDERSTATE;
      }
   }
}

union fi { 
   GLfloat f; 
   GLint i; 
};


/**********************************************************************/
/*             Used only with the metaops callbacks.                  */
/**********************************************************************/
void intel_meta_draw_quad(struct intel_context *intel, 
			  GLfloat x0, GLfloat x1,
			  GLfloat y0, GLfloat y1, 
			  GLfloat z,
			  GLuint color,
			  GLfloat s0, GLfloat s1,
			  GLfloat t0, GLfloat t1)
{
   union fi *vb;

   if (INTEL_DEBUG & DEBUG_DRI)
      fprintf(stderr, "%s: %f,%f-%f,%f 0x%x %f,%f-%f,%f depth: %f\n",
	      __FUNCTION__,
	      x0,y0,x1,y1,color,s0,t0,s1,t1, z);

   intel->vtbl.emit_state( intel );

   /* All 3d primitives should be emitted with INTEL_BATCH_CLIPRECTS,
    * otherwise the drawing origin (DR4) might not be set correctly.
    */
   intelStartInlinePrimitive( intel, PRIM3D_TRIFAN, INTEL_BATCH_CLIPRECTS );  
   vb = (union fi *)intelExtendInlinePrimitive( intel, 4 * 6 );


   /* initial vertex, left bottom */
   vb[0].f = x0;
   vb[1].f = y0;
   vb[2].f = z;
   vb[3].i = color;
   vb[4].f = s0;
   vb[5].f = t0;
   vb += 6;

   /* right bottom */
   vb[0].f = x1;
   vb[1].f = y0;
   vb[2].f = z;
   vb[3].i = color;
   vb[4].f = s1;
   vb[5].f = t0;
   vb += 6;

   /* right top */
   vb[0].f = x1;
   vb[1].f = y1;
   vb[2].f = z;
   vb[3].i = color;
   vb[4].f = s1;
   vb[5].f = t1;
   vb += 6;

   /* left top */
   vb[0].f = x0;
   vb[1].f = y1;
   vb[2].f = z;
   vb[3].i = color;
   vb[4].f = s0;
   vb[5].f = t1;

   if (intel->prim.flush)
      intel->prim.flush(intel);
}


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


void intelInitTriFuncs( GLcontext *ctx )
{
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   static int firsttime = 1;

   if (firsttime) {
      init_rast_tab();
      firsttime = 0;
   }

   tnl->Driver.RunPipeline = intelRunPipeline;
   tnl->Driver.Render.Start = intelRenderStart;
   tnl->Driver.Render.Finish = intelRenderFinish;
   tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
   tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
   tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
   tnl->Driver.Render.CopyPV = _tnl_copy_pv;
   tnl->Driver.Render.Interp = _tnl_interp;
}