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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
#ifndef LP_PRIM_SETUP_H
#define LP_PRIM_SETUP_H
/**
* vbuf is a special stage to gather the stream of triangles, lines, points
* together and reconstruct vertex buffers for hardware upload.
*
* First attempt, work in progress.
*
* TODO:
* - separate out vertex buffer building and primitive emit, ie >1 draw per vb.
* - tell vbuf stage how to build hw vertices directly
* - pass vbuf stage a buffer pointer for direct emit to agp/vram.
*
*
*
* Vertices are just an array of floats, with all the attributes
* packed. We currently assume a layout like:
*
* attr[0][0..3] - window position
* attr[1..n][0..3] - remaining attributes.
*
* Attributes are assumed to be 4 floats wide but are packed so that
* all the enabled attributes run contiguously.
*/
struct draw_stage;
struct llvmpipe_context;
typedef void (*vbuf_draw_func)( struct pipe_context *pipe,
unsigned prim,
const ushort *elements,
unsigned nr_elements,
const void *vertex_buffer,
unsigned nr_vertices );
extern struct draw_stage *
lp_draw_render_stage( struct llvmpipe_context *llvmpipe );
extern struct setup_context *
lp_draw_setup_context( struct draw_stage * );
extern void
lp_draw_flush( struct draw_stage * );
extern struct draw_stage *
lp_draw_vbuf_stage( struct draw_context *draw_context,
struct pipe_context *pipe,
vbuf_draw_func draw );
#endif /* LP_PRIM_SETUP_H */
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