Subversion Repositories Kolibri OS

 * quad polygon stipple stage

 */

#include "sp_quad.h"

#include "sp_quad_pipe.h"

#include "pipe/p_defines.h"

#include "util/u_memory.h"

 * Apply polygon stipple to quads produced by triangle rasterization

 */

static void

stipple_quad(struct quad_stage *qs, struct quad_header *quads[], unsigned nr)

{

   static const uint bit31 = 1 << 31;

   static const uint bit30 = 1 << 30;

   unsigned pass = nr;

   unsigned q;

      struct quad_header *quad = quads[q];

      const int y0 = quad->input.y0;

      const int y1 = y0 + 1;

      const uint stipple0 = softpipe->poly_stipple.stipple[y0 % 32];

      const uint stipple1 = softpipe->poly_stipple.stipple[y1 % 32];

      if ((stipple0 & (bit31 >> col0)) == 0)

         quad->inout.mask &= ~MASK_TOP_LEFT;

         quad->inout.mask &= ~MASK_TOP_RIGHT;

         quad->inout.mask &= ~MASK_BOTTOM_LEFT;

         quad->inout.mask &= ~MASK_BOTTOM_RIGHT;

         quads[pass++] = quad;

   }

}

{

   qs->next->begin(qs->next);

}

{

   FREE( qs );

}

sp_quad_polygon_stipple_stage( struct softpipe_context *softpipe )

{

   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);

   stage->begin = stipple_begin;

   stage->run = stipple_quad;

   stage->destroy = stipple_destroy;

}