r128_tris.c

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

    r128ContextPtr rmesa = R128_CONTEXT(ctx);		\
    const GLuint vertsize = rmesa->vertex_size;		\
    const char *vertptr = (char *)rmesa->verts;		\
    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) r128_##x##_verts
#include "tnl/t_vb_rendertmp.h"
#undef ELT
#undef TAG
#define TAG(x) r128_##x##_elts
#define ELT(x) elt[x]
#include "tnl/t_vb_rendertmp.h"


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

#define POINT_FALLBACK (DD_POINT_SMOOTH)
#define LINE_FALLBACK (DD_LINE_STIPPLE)
#define TRI_FALLBACK (DD_TRI_SMOOTH)
#define ANY_FALLBACK_FLAGS (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK)
#define ANY_RASTER_FLAGS (DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET|DD_TRI_UNFILLED)
#define _R128_NEW_RENDER_STATE (ANY_FALLBACK_FLAGS | ANY_RASTER_FLAGS)

static void r128ChooseRenderState(GLcontext *ctx)
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   GLuint flags = ctx->_TriangleCaps;
   GLuint index = 0;

   if (flags & (ANY_RASTER_FLAGS|ANY_FALLBACK_FLAGS)) {
      rmesa->draw_point = r128_point;
      rmesa->draw_line = r128_line;
      rmesa->draw_tri = r128_triangle;

      if (flags & ANY_RASTER_FLAGS) {
	 if (flags & DD_TRI_LIGHT_TWOSIDE) index |= R128_TWOSIDE_BIT;
	 if (flags & DD_TRI_OFFSET)        index |= R128_OFFSET_BIT;
	 if (flags & DD_TRI_UNFILLED)      index |= R128_UNFILLED_BIT;
      }

      /* Hook in fallbacks for specific primitives.
       */
      if (flags & (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK)) {
	 if (flags & POINT_FALLBACK) rmesa->draw_point = r128_fallback_point;
	 if (flags & LINE_FALLBACK)  rmesa->draw_line = r128_fallback_line;
	 if (flags & TRI_FALLBACK)   rmesa->draw_tri = r128_fallback_tri;
	 index |= R128_FALLBACK_BIT;
      }
   }

   if (index != rmesa->RenderIndex) {
      TNLcontext *tnl = TNL_CONTEXT(ctx);
      tnl->Driver.Render.Points = rast_tab[index].points;
      tnl->Driver.Render.Line = rast_tab[index].line;
      tnl->Driver.Render.ClippedLine = 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 = r128_render_tab_verts;
	 tnl->Driver.Render.PrimTabElts = r128_render_tab_elts;
	 tnl->Driver.Render.ClippedPolygon = r128_fast_clipped_poly;
      } else {
	 tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
	 tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
	 tnl->Driver.Render.ClippedPolygon = _tnl_RenderClippedPolygon;
      }

      rmesa->RenderIndex = index;
   }
}

/**********************************************************************/
/*                 Validate state at pipeline start                   */
/**********************************************************************/

static void r128RunPipeline( GLcontext *ctx )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);

   if (rmesa->new_state || rmesa->NewGLState & _NEW_TEXTURE)
      r128DDUpdateHWState( ctx );

   if (!rmesa->Fallback && rmesa->NewGLState) {
      if (rmesa->NewGLState & _R128_NEW_RENDER_STATE)
	 r128ChooseRenderState( ctx );

      rmesa->NewGLState = 0;
   }

   _tnl_run_pipeline( ctx );
}

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

/* This is called when Mesa switches between rendering triangle
 * primitives (such as GL_POLYGON, GL_QUADS, GL_TRIANGLE_STRIP, etc),
 * and lines, points and bitmaps.
 *
 * As the r128 uses triangles to render lines and points, it is
 * necessary to turn off hardware culling when rendering these
 * primitives.
 */

static void r128RasterPrimitive( GLcontext *ctx, GLuint hwprim )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);

   rmesa->setup.dp_gui_master_cntl_c &= ~R128_GMC_BRUSH_NONE;

   if ( ctx->Polygon.StippleFlag && hwprim == GL_TRIANGLES ) {
      rmesa->setup.dp_gui_master_cntl_c |= R128_GMC_BRUSH_32x32_MONO_FG_LA;
   }
   else {
      rmesa->setup.dp_gui_master_cntl_c |= R128_GMC_BRUSH_SOLID_COLOR;
   }

   rmesa->new_state |= R128_NEW_CONTEXT;
   rmesa->dirty |= R128_UPLOAD_CONTEXT;

   if (rmesa->hw_primitive != hwprim) {
      FLUSH_BATCH( rmesa );
      rmesa->hw_primitive = hwprim;
   }
}

static void r128SetupAntialias( GLcontext *ctx, GLenum prim )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);

   GLuint currAA, wantAA;
   
   currAA = (rmesa->setup.pm4_vc_fpu_setup & R128_EDGE_ANTIALIAS) != 0;
   if( prim >= GL_TRIANGLES )
      wantAA = ctx->Polygon.SmoothFlag;
   else if( prim >= GL_LINES )
      wantAA = ctx->Line.SmoothFlag;
   else
      wantAA = 0;
      
   if( wantAA != currAA )
   {
     FLUSH_BATCH( rmesa );
     rmesa->setup.pm4_vc_fpu_setup ^= R128_EDGE_ANTIALIAS;
     rmesa->dirty |= R128_UPLOAD_SETUP;
   }
}

static void r128RenderPrimitive( GLcontext *ctx, GLenum prim )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   GLuint hw = hw_prim[prim];
   rmesa->render_primitive = prim;

   r128SetupAntialias( ctx, prim );
   
   if (prim >= GL_TRIANGLES && (ctx->_TriangleCaps & DD_TRI_UNFILLED))
      return;
   r128RasterPrimitive( ctx, hw );
}

#define EMIT_ATTR( ATTR, STYLE, VF, SIZE )				\
do {									\
   rmesa->vertex_attrs[rmesa->vertex_attr_count].attrib = (ATTR);	\
   rmesa->vertex_attrs[rmesa->vertex_attr_count].format = (STYLE);	\
   rmesa->vertex_attr_count++;						\
   vc_frmt |= (VF);							\
   offset += (SIZE);							\
} while (0)

#define EMIT_PAD( SIZE )						\
do {									\
   rmesa->vertex_attrs[rmesa->vertex_attr_count].attrib = 0;		\
   rmesa->vertex_attrs[rmesa->vertex_attr_count].format = EMIT_PAD;	\
   rmesa->vertex_attrs[rmesa->vertex_attr_count].offset = (SIZE);	\
   rmesa->vertex_attr_count++;						\
   offset += (SIZE);							\
} while (0)

static void r128RenderStart( GLcontext *ctx )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   struct vertex_buffer *VB = &tnl->vb;
   DECLARE_RENDERINPUTS(index_bitset);
   GLuint vc_frmt = 0;
   GLboolean fallback_projtex = GL_FALSE;
   GLuint offset = 0;

   RENDERINPUTS_COPY( index_bitset, tnl->render_inputs_bitset );

   /* Important: */
   VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
   rmesa->vertex_attr_count = 0;
   rmesa->specoffset = 0;

   /* EMIT_ATTR's must be in order as they tell t_vertex.c how to
    * build up a hardware vertex.
    */
   if (RENDERINPUTS_TEST_RANGE( index_bitset, _TNL_FIRST_TEX, _TNL_LAST_TEX ))
      EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, R128_CCE_VC_FRMT_RHW, 4 );
   else
      EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_3F_VIEWPORT, 0, 3 );

   rmesa->coloroffset = offset;
#if MESA_LITTLE_ENDIAN 
   EMIT_ATTR( _TNL_ATTRIB_COLOR0, EMIT_4UB_4F_BGRA,
      R128_CCE_VC_FRMT_DIFFUSE_ARGB, 4 );
#else
   EMIT_ATTR( _TNL_ATTRIB_COLOR0, EMIT_4UB_4F_ARGB,
      R128_CCE_VC_FRMT_DIFFUSE_ARGB, 4 );
#endif

   if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_COLOR1 ) ||
       RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_FOG )) {
#if MESA_LITTLE_ENDIAN
      if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_COLOR1 )) {
	 rmesa->specoffset = offset;
	 EMIT_ATTR( _TNL_ATTRIB_COLOR1, EMIT_3UB_3F_BGR,
	    R128_CCE_VC_FRMT_SPEC_FRGB, 3 );
      } else 
	 EMIT_PAD( 3 );

      if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_FOG ))
	 EMIT_ATTR( _TNL_ATTRIB_FOG, EMIT_1UB_1F, R128_CCE_VC_FRMT_SPEC_FRGB,
		    1 );
      else
	 EMIT_PAD( 1 );
#else
      if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_FOG ))
	 EMIT_ATTR( _TNL_ATTRIB_FOG, EMIT_1UB_1F, R128_CCE_VC_FRMT_SPEC_FRGB,
		    1 );
      else
	 EMIT_PAD( 1 );

      if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_COLOR1 )) {
	 rmesa->specoffset = offset;
	 EMIT_ATTR( _TNL_ATTRIB_COLOR1, EMIT_3UB_3F_RGB,
	    R128_CCE_VC_FRMT_SPEC_FRGB, 3 );
      } else 
	 EMIT_PAD( 3 );
#endif
   }

   if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_TEX(rmesa->tmu_source[0]) )) {
      if ( VB->TexCoordPtr[rmesa->tmu_source[0]]->size > 2 )
	 fallback_projtex = GL_TRUE;
      EMIT_ATTR( _TNL_ATTRIB_TEX0, EMIT_2F, R128_CCE_VC_FRMT_S_T, 8 );
   }
   if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_TEX(rmesa->tmu_source[1]) )) {
      if ( VB->TexCoordPtr[rmesa->tmu_source[1]]->size > 2 )
	 fallback_projtex = GL_TRUE;
      EMIT_ATTR( _TNL_ATTRIB_TEX1, EMIT_2F, R128_CCE_VC_FRMT_S2_T2, 8 );
   }

   /* projective textures are not supported by the hardware */
   FALLBACK( rmesa, R128_FALLBACK_PROJTEX, fallback_projtex );

   /* Only need to change the vertex emit code if there has been a
    * statechange to a TNL index.
    */
   if (!RENDERINPUTS_EQUAL( index_bitset, rmesa->tnl_state_bitset )) {
      FLUSH_BATCH( rmesa );
      rmesa->dirty |= R128_UPLOAD_CONTEXT;

      rmesa->vertex_size = 
	 _tnl_install_attrs( ctx, 
			     rmesa->vertex_attrs, 
			     rmesa->vertex_attr_count,
			     rmesa->hw_viewport, 0 );
      rmesa->vertex_size >>= 2;

      rmesa->vertex_format = vc_frmt;
   }
}

static void r128RenderFinish( GLcontext *ctx )
{
   if (R128_CONTEXT(ctx)->RenderIndex & R128_FALLBACK_BIT)
      _swrast_flush( ctx );
}


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

static const char * const fallbackStrings[] = {
   "Texture mode",
   "glDrawBuffer(GL_FRONT_AND_BACK)",
   "glReadBuffer",
   "glEnable(GL_STENCIL) without hw stencil buffer",
   "glRenderMode(selection or feedback)",
   "glLogicOp (mode != GL_COPY)",
   "GL_SEPARATE_SPECULAR_COLOR",
   "glBlendEquation(mode != ADD)",
   "glBlendFunc",
   "Projective texture",
   "Rasterization disable",
};


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

void r128Fallback( GLcontext *ctx, GLuint bit, GLboolean mode )
{
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   GLuint oldfallback = rmesa->Fallback;

   if (mode) {
      rmesa->Fallback |= bit;
      if (oldfallback == 0) {
	 FLUSH_BATCH( rmesa );
	 _swsetup_Wakeup( ctx );
	 rmesa->RenderIndex = ~0;
	 if ( R128_DEBUG & DEBUG_VERBOSE_FALL ) {
	     fprintf(stderr, "R128 begin rasterization fallback: 0x%x %s\n",
		     bit, getFallbackString(bit));
	 }
      }
   }
   else {
      rmesa->Fallback &= ~bit;
      if (oldfallback == bit) {
	 _swrast_flush( ctx );
	 tnl->Driver.Render.Start = r128RenderStart;
	 tnl->Driver.Render.PrimitiveNotify = r128RenderPrimitive;
	 tnl->Driver.Render.Finish = r128RenderFinish;

	 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, 
			     rmesa->vertex_attrs, 
			     rmesa->vertex_attr_count,
			     rmesa->hw_viewport, 0 ); 

	 rmesa->NewGLState |= _R128_NEW_RENDER_STATE;
	 if ( R128_DEBUG & DEBUG_VERBOSE_FALL ) {
	     fprintf(stderr, "R128 end rasterization fallback: 0x%x %s\n",
		     bit, getFallbackString(bit));
	 }
      }
   }
}


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

void r128InitTriFuncs( GLcontext *ctx )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   static int firsttime = 1;

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

   tnl->Driver.RunPipeline = r128RunPipeline;
   tnl->Driver.Render.Start = r128RenderStart;
   tnl->Driver.Render.Finish = r128RenderFinish;
   tnl->Driver.Render.PrimitiveNotify = r128RenderPrimitive;
   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;

   _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12, 
		       (6 + 2 * ctx->Const.MaxTextureUnits) * sizeof(GLfloat) );
   rmesa->verts = (char *)tnl->clipspace.vertex_buf;
   RENDERINPUTS_ONES( rmesa->tnl_state_bitset );

   rmesa->NewGLState |= _R128_NEW_RENDER_STATE;
}