src/gallium/drivers/llvmpipe/lp_prim_setup.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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  27
  28
  29 #ifndef LP_PRIM_SETUP_H
  30 #define LP_PRIM_SETUP_H
  31
  32
  33 /**
  34  * vbuf is a special stage to gather the stream of triangles, lines, points
  35  * together and reconstruct vertex buffers for hardware upload.
  36  *
  37  * First attempt, work in progress.
  38  *
  39  * TODO:
  40  *    - separate out vertex buffer building and primitive emit, ie >1 draw per vb.
  41  *    - tell vbuf stage how to build hw vertices directly
  42  *    - pass vbuf stage a buffer pointer for direct emit to agp/vram.
  43  *
  44  *
  45  *
  46  * Vertices are just an array of floats, with all the attributes
  47  * packed.  We currently assume a layout like:
  48  *
  49  * attr[0][0..3] - window position
  50  * attr[1..n][0..3] - remaining attributes.
  51  *
  52  * Attributes are assumed to be 4 floats wide but are packed so that
  53  * all the enabled attributes run contiguously.
  54  */
  55
  56
  57 struct draw_stage;
  58 struct llvmpipe_context;
  59
  60
  61 typedef void (*vbuf_draw_func)( struct pipe_context *pipe,
  62                                 unsigned prim,
  63                                 const ushort *elements,
  64                                 unsigned nr_elements,
  65                                 const void *vertex_buffer,
  66                                 unsigned nr_vertices );
  67
  68
  69 extern struct draw_stage *
  70 lp_draw_render_stage( struct llvmpipe_context *llvmpipe );
  71
  72 extern struct setup_context *
  73 lp_draw_setup_context( struct draw_stage * );
  74
  75 extern void
  76 lp_draw_flush( struct draw_stage * );
  77
  78
  79 extern struct draw_stage *
  80 lp_draw_vbuf_stage( struct draw_context *draw_context,
  81                     struct pipe_context *pipe,
  82                     vbuf_draw_func draw );
  83
  84
  85 #endif /* LP_PRIM_SETUP_H */