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  * Basic info for a point/line/triangle primitive.
  42  */
  43 struct prim_header {
  44    float det;                 /**< front/back face determinant */
  45    ushort flags;
  46    ushort pad;
  47    struct vertex_header *v[3];  /**< 1 to 3 vertex pointers */
  48 };
  49
  50
  51
  52 /**
  53  * Base class for all primitive drawing stages.
  54  */
  55 struct draw_stage
  56 {
  57    struct draw_context *draw;   /**< parent context */
  58
  59    struct draw_stage *next;     /**< next stage in pipeline */
  60    const char *name;            /**< for debugging  */
  61
  62    struct vertex_header **tmp;  /**< temp vert storage, such as for clipping */
  63    unsigned nr_tmps;
  64
  65    void (*point)( struct draw_stage *,
  66                   struct prim_header * );
  67
  68    void (*line)( struct draw_stage *,
  69                  struct prim_header * );
  70
  71    void (*tri)( struct draw_stage *,
  72                 struct prim_header * );
  73
  74    void (*flush)( struct draw_stage *,
  75                   unsigned flags );
  76
  77    void (*reset_stipple_counter)( struct draw_stage * );
  78
  79    void (*destroy)( struct draw_stage * );
  80 };
  81
  82
  83 extern struct draw_stage *draw_unfilled_stage( struct draw_context *context );
  84 extern struct draw_stage *draw_twoside_stage( struct draw_context *context );
  85 extern struct draw_stage *draw_offset_stage( struct draw_context *context );
  86 extern struct draw_stage *draw_clip_stage( struct draw_context *context );
  87 extern struct draw_stage *draw_flatshade_stage( struct draw_context *context );
  88 extern struct draw_stage *draw_cull_stage( struct draw_context *context );
  89 extern struct draw_stage *draw_stipple_stage( struct draw_context *context );
  90 extern struct draw_stage *draw_wide_line_stage( struct draw_context *context );
  91 extern struct draw_stage *draw_wide_point_stage( struct draw_context *context );
  92 extern struct draw_stage *draw_validate_stage( struct draw_context *context );
  93
  94
  95 extern void draw_free_temp_verts( struct draw_stage *stage );
  96 extern boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr );
  97
  98 extern void draw_reset_vertex_ids( struct draw_context *draw );
  99
 100 void draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header);
 101 void draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header);
 102 void draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header);
 103
 104
 105
 106 /**
 107  * Get a writeable copy of a vertex.
 108  * \param stage  drawing stage info
 109  * \param vert  the vertex to copy (source)
 110  * \param idx  index into stage's tmp[] array to put the copy (dest)
 111  * \return  pointer to the copied vertex
 112  */
 113 static INLINE struct vertex_header *
 114 dup_vert( struct draw_stage *stage,
 115           const struct vertex_header *vert,
 116           unsigned idx )
 117 {
 118    struct vertex_header *tmp = stage->tmp[idx];
 119    const uint vsize = sizeof(struct vertex_header)
 120       + stage->draw->vs.num_vs_outputs * 4 * sizeof(float);
 121    memcpy(tmp, vert, vsize);
 122    tmp->vertex_id = UNDEFINED_VERTEX_ID;
 123    return tmp;
 124 }
 125
 126 #endif