src/gallium/auxiliary/draw/draw_pipe.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33 #ifndef DRAW_PIPE_H
  34 #define DRAW_PIPE_H
  35
  36 #include "pipe/p_compiler.h"
  37 #include "draw_private.h"       /* for sizeof(vertex_header) */
  38
  39
  40
  41 /**
  42  * Base class for all primitive drawing stages.
  43  */
  44 struct draw_stage
  45 {
  46    struct draw_context *draw;   /**< parent context */
  47
  48    struct draw_stage *next;     /**< next stage in pipeline */
  49
  50    struct vertex_header **tmp;  /**< temp vert storage, such as for clipping */
  51    unsigned nr_tmps;
  52
  53    void (*point)( struct draw_stage *,
  54                   struct prim_header * );
  55
  56    void (*line)( struct draw_stage *,
  57                  struct prim_header * );
  58
  59    void (*tri)( struct draw_stage *,
  60                 struct prim_header * );
  61
  62    void (*flush)( struct draw_stage *,
  63                   unsigned flags );
  64
  65    void (*reset_stipple_counter)( struct draw_stage * );
  66
  67    void (*destroy)( struct draw_stage * );
  68 };
  69
  70
  71 extern struct draw_stage *draw_unfilled_stage( struct draw_context *context );
  72 extern struct draw_stage *draw_twoside_stage( struct draw_context *context );
  73 extern struct draw_stage *draw_offset_stage( struct draw_context *context );
  74 extern struct draw_stage *draw_clip_stage( struct draw_context *context );
  75 extern struct draw_stage *draw_flatshade_stage( struct draw_context *context );
  76 extern struct draw_stage *draw_cull_stage( struct draw_context *context );
  77 extern struct draw_stage *draw_stipple_stage( struct draw_context *context );
  78 extern struct draw_stage *draw_wide_line_stage( struct draw_context *context );
  79 extern struct draw_stage *draw_wide_point_stage( struct draw_context *context );
  80 extern struct draw_stage *draw_validate_stage( struct draw_context *context );
  81
  82
  83 extern void draw_free_temp_verts( struct draw_stage *stage );
  84
  85 extern void draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr );
  86
  87
  88
  89
  90 /**
  91  * Get a writeable copy of a vertex.
  92  * \param stage  drawing stage info
  93  * \param vert  the vertex to copy (source)
  94  * \param idx  index into stage's tmp[] array to put the copy (dest)
  95  * \return  pointer to the copied vertex
  96  */
  97 static INLINE struct vertex_header *
  98 dup_vert( struct draw_stage *stage,
  99           const struct vertex_header *vert,
 100           unsigned idx )
 101 {
 102    struct vertex_header *tmp = stage->tmp[idx];
 103    const uint vsize = sizeof(struct vertex_header)
 104       + stage->draw->num_vs_outputs * 4 * sizeof(float);
 105    memcpy(tmp, vert, vsize);
 106    tmp->vertex_id = UNDEFINED_VERTEX_ID;
 107    return tmp;
 108 }
 109
 110 #endif