Subversion Repositories Kolibri OS

/**********************************************************

 * Copyright 2008-2009 VMware, Inc.  All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person

 * obtaining a copy of this software and associated documentation

 * files (the "Software"), to deal in the Software without

 * restriction, including without limitation the rights to use, copy,

 * modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 *

 **********************************************************/

#include "draw/draw_context.h"

#include "util/u_inlines.h"

#include "pipe/p_defines.h"

#include "util/u_math.h"

#include "util/u_memory.h"

#include "svga_context.h"

#include "svga_hw_reg.h"

/* Hardware frontwinding is always set up as SVGA3D_FRONTWINDING_CW.

 */

static SVGA3dFace svga_translate_cullmode( unsigned mode,

                                           unsigned front_ccw )

{

   const int hw_front_ccw = 0;  /* hardware is always CW */

   switch (mode) {

   case PIPE_FACE_NONE:

      return SVGA3D_FACE_NONE;

   case PIPE_FACE_FRONT:

      return front_ccw == hw_front_ccw ? SVGA3D_FACE_FRONT : SVGA3D_FACE_BACK;

   case PIPE_FACE_BACK:

      return front_ccw == hw_front_ccw ? SVGA3D_FACE_BACK : SVGA3D_FACE_FRONT;

   case PIPE_FACE_FRONT_AND_BACK:

      return SVGA3D_FACE_FRONT_BACK;

   default:

      assert(0);

      return SVGA3D_FACE_NONE;

   }

}

static SVGA3dShadeMode svga_translate_flatshade( unsigned mode )

{

   return mode ? SVGA3D_SHADEMODE_FLAT : SVGA3D_SHADEMODE_SMOOTH;

}

static void *

svga_create_rasterizer_state(struct pipe_context *pipe,

                             const struct pipe_rasterizer_state *templ)

{

   struct svga_context *svga = svga_context(pipe);

   struct svga_rasterizer_state *rast = CALLOC_STRUCT( svga_rasterizer_state );

   /* need this for draw module. */

   rast->templ = *templ;

   /* light_twoside          - XXX: need fragment shader variant */

   /* poly_smooth            - XXX: no fallback available */

   /* poly_stipple_enable    - draw module */

   /* sprite_coord_enable    - ? */

   /* point_quad_rasterization - ? */

   /* point_size_per_vertex  - ? */

   /* sprite_coord_mode      - ??? */

   /* flatshade_first        - handled by index translation */

   /* half_pixel_center      - XXX - viewport code */

   /* line_width             - draw module */

   /* fill_cw, fill_ccw      - draw module or index translation */

   rast->shademode = svga_translate_flatshade( templ->flatshade );

   rast->cullmode = svga_translate_cullmode( templ->cull_face,

                                             templ->front_ccw );

   rast->scissortestenable = templ->scissor;

   rast->multisampleantialias = templ->multisample;

   rast->antialiasedlineenable = templ->line_smooth;

   rast->lastpixel = templ->line_last_pixel;

   rast->pointsprite = templ->sprite_coord_enable != 0x0;

   rast->pointsize = templ->point_size;

   rast->hw_unfilled = PIPE_POLYGON_MODE_FILL;

   /* Use swtnl + decomposition implement these:

    */

   if (templ->poly_stipple_enable) {

      rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS;

      rast->need_pipeline_tris_str = "poly stipple";

   }

   if (templ->line_width >= 1.5f &&

       !svga->debug.no_line_width) {

      rast->need_pipeline |= SVGA_PIPELINE_FLAG_LINES;

      rast->need_pipeline_lines_str = "line width";

   }

   if (templ->line_stipple_enable) {

      /* XXX: LinePattern not implemented on all backends, and there is no

       * mechanism to query it.

       */

      if (!svga->debug.force_hw_line_stipple) {

         SVGA3dLinePattern lp;

         lp.repeat = templ->line_stipple_factor + 1;

         lp.pattern = templ->line_stipple_pattern;

         rast->linepattern = lp.uintValue;

      }

      else {

         rast->need_pipeline |= SVGA_PIPELINE_FLAG_LINES;

         rast->need_pipeline_lines_str = "line stipple";

      }

   }

   if (templ->point_smooth) {

      rast->need_pipeline |= SVGA_PIPELINE_FLAG_POINTS;

      rast->need_pipeline_points_str = "smooth points";

   }

   if (templ->line_smooth) {

      rast->need_pipeline |= SVGA_PIPELINE_FLAG_LINES;

      rast->need_pipeline_lines_str = "smooth lines";

   }

   {

      int fill_front = templ->fill_front;

      int fill_back = templ->fill_back;

      int fill = PIPE_POLYGON_MODE_FILL;

      boolean offset_front = util_get_offset(templ, fill_front);

      boolean offset_back = util_get_offset(templ, fill_back);

      boolean offset  = 0;

      switch (templ->cull_face) {

      case PIPE_FACE_FRONT_AND_BACK:

         offset = 0;

         fill = PIPE_POLYGON_MODE_FILL;

         break;

      case PIPE_FACE_FRONT:

         offset = offset_front;

         fill = fill_front;

         break;

      case PIPE_FACE_BACK:

         offset = offset_back;

         fill = fill_back;

         break;

      case PIPE_FACE_NONE:

         if (fill_front != fill_back || offset_front != offset_back)

         {

            /* Always need the draw module to work out different

             * front/back fill modes:

             */

            rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS;

            rast->need_pipeline_tris_str = "different front/back fillmodes";

         }

         else {

            offset = offset_front;

            fill = fill_front;

         }

         break;

      default:

         assert(0);

         break;

      }

      /* Unfilled primitive modes aren't implemented on all virtual

       * hardware.  We can do some unfilled processing with index

       * translation, but otherwise need the draw module:

       */

      if (fill != PIPE_POLYGON_MODE_FILL &&

          (templ->flatshade ||

           templ->light_twoside ||

           offset ||

           templ->cull_face != PIPE_FACE_NONE))

      {

         fill = PIPE_POLYGON_MODE_FILL;

         rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS;

         rast->need_pipeline_tris_str = "unfilled primitives with no index manipulation";

      }

      /* If we are decomposing to lines, and lines need the pipeline,

       * then we also need the pipeline for tris.

       */

      if (fill == PIPE_POLYGON_MODE_LINE &&

          (rast->need_pipeline & SVGA_PIPELINE_FLAG_LINES))

      {

         fill = PIPE_POLYGON_MODE_FILL;

         rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS;

         rast->need_pipeline_tris_str = "decomposing lines";

      }

      /* Similarly for points:

       */

      if (fill == PIPE_POLYGON_MODE_POINT &&

          (rast->need_pipeline & SVGA_PIPELINE_FLAG_POINTS))

      {

         fill = PIPE_POLYGON_MODE_FILL;

         rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS;

         rast->need_pipeline_tris_str = "decomposing points";

      }

      if (offset) {

         rast->slopescaledepthbias = templ->offset_scale;

         rast->depthbias = templ->offset_units;

      }

      rast->hw_unfilled = fill;

   }

   if (rast->need_pipeline & SVGA_PIPELINE_FLAG_TRIS) {

      /* Turn off stuff which will get done in the draw module:

       */

      rast->hw_unfilled = PIPE_POLYGON_MODE_FILL;

      rast->slopescaledepthbias = 0;

      rast->depthbias = 0;

   }

   return rast;

}

static void svga_bind_rasterizer_state( struct pipe_context *pipe,

                                        void *state )

{

   struct svga_context *svga = svga_context(pipe);

   struct svga_rasterizer_state *raster = (struct svga_rasterizer_state *)state;

   draw_set_rasterizer_state(svga->swtnl.draw, raster ? &raster->templ : NULL,

                             state);

   svga->curr.rast = raster;

   svga->dirty |= SVGA_NEW_RAST;

}

static void svga_delete_rasterizer_state(struct pipe_context *pipe,

                                         void *raster)

{

   FREE(raster);

}

void svga_init_rasterizer_functions( struct svga_context *svga )

{

   svga->pipe.create_rasterizer_state = svga_create_rasterizer_state;

   svga->pipe.bind_rasterizer_state = svga_bind_rasterizer_state;

   svga->pipe.delete_rasterizer_state = svga_delete_rasterizer_state;

}

/***********************************************************************

 * Hardware state update

 */