static void large_point	(	GLcontext *	ctx,
		const SWvertex *	vert
	)		`[static]`
Draw large (size >= 1) non-AA point. RGB or CI mode.
Definition at line 372 of file s_points.c.
Referenced by _swrast_choose_point().
{
   SWcontext *swrast = SWRAST_CONTEXT(ctx);
   const GLboolean ciMode = !ctx->Visual.rgbMode;
   SWspan span;
   GLfloat size;

   CULL_INVALID(vert);

   /* z coord */
   if (ctx->DrawBuffer->Visual.depthBits <= 16)
      span.z = FloatToFixed(vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
   else
      span.z = (GLuint) (vert->attrib[FRAG_ATTRIB_WPOS][2] + 0.5F);
   span.zStep = 0;

   size = get_size(ctx, vert, GL_FALSE);

   /* span init */
   INIT_SPAN(span, GL_POINT);
   span.arrayMask = SPAN_XY;
   span.facing = swrast->PointLineFacing;

   if (ciMode) {
      span.interpMask = SPAN_Z | SPAN_INDEX;
      span.index = FloatToFixed(vert->attrib[FRAG_ATTRIB_CI][0]);
      span.indexStep = 0;
   }
   else {
      span.interpMask = SPAN_Z | SPAN_RGBA;
      span.red   = ChanToFixed(vert->color[0]);
      span.green = ChanToFixed(vert->color[1]);
      span.blue  = ChanToFixed(vert->color[2]);
      span.alpha = ChanToFixed(vert->color[3]);
      span.redStep = 0;
      span.greenStep = 0;
      span.blueStep = 0;
      span.alphaStep = 0;
   }

   /* need these for fragment programs */
   span.attrStart[FRAG_ATTRIB_WPOS][3] = 1.0F;
   span.attrStepX[FRAG_ATTRIB_WPOS][3] = 0.0F;
   span.attrStepY[FRAG_ATTRIB_WPOS][3] = 0.0F;

   ATTRIB_LOOP_BEGIN
      COPY_4V(span.attrStart[attr], vert->attrib[attr]);
      ASSIGN_4V(span.attrStepX[attr], 0, 0, 0, 0);
      ASSIGN_4V(span.attrStepY[attr], 0, 0, 0, 0);
   ATTRIB_LOOP_END

   /* compute pos, bounds and render */
   {
      const GLfloat x = vert->attrib[FRAG_ATTRIB_WPOS][0];
      const GLfloat y = vert->attrib[FRAG_ATTRIB_WPOS][1];
      GLint iSize = (GLint) (size + 0.5F);
      GLint xmin, xmax, ymin, ymax, ix, iy;
      GLint iRadius;

      iSize = MAX2(1, iSize);
      iRadius = iSize / 2;

      if (iSize & 1) {
         /* odd size */
         xmin = (GLint) (x - iRadius);
         xmax = (GLint) (x + iRadius);
         ymin = (GLint) (y - iRadius);
         ymax = (GLint) (y + iRadius);
      }
      else {
         /* even size */
         /* 0.501 factor allows conformance to pass */
         xmin = (GLint) (x + 0.501) - iRadius;
         xmax = xmin + iSize - 1;
         ymin = (GLint) (y + 0.501) - iRadius;
         ymax = ymin + iSize - 1;
      }

      /* generate fragments */
      span.end = 0;
      for (iy = ymin; iy <= ymax; iy++) {
         for (ix = xmin; ix <= xmax; ix++) {
            span.array->x[span.end] = ix;
            span.array->y[span.end] = iy;
            span.end++;
         }
      }
      assert(span.end <= MAX_WIDTH);
      _swrast_write_rgba_span(ctx, &span);
   }
}
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