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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.
*
**************************************************************************/
/* Author:
* Brian Paul
* Keith Whitwell
*/
#include "pipe/p_defines.h"
#include "pipe/p_context.h"
#include "pipe/p_winsys.h"
#include "pipe/p_util.h"
#include "pipe/draw/draw_private.h"
#include "pipe/draw/draw_context.h"
#include "pipe/draw/draw_prim.h"
/**
* Draw vertex arrays
* This is the main entrypoint into the drawing module.
* \param prim one of PIPE_PRIM_x
* \param start index of first vertex to draw
* \param count number of vertices to draw
*/
void
draw_arrays(struct draw_context *draw, unsigned prim,
unsigned start, unsigned count)
{
/* tell drawing pipeline we're beginning drawing */
draw->pipeline.first->begin( draw->pipeline.first );
draw_invalidate_vcache( draw );
draw_set_prim( draw, prim );
/* drawing done here: */
draw_prim(draw, start, count);
/* draw any left-over buffered prims */
draw_flush(draw);
/* tell drawing pipeline we're done drawing */
draw->pipeline.first->end( draw->pipeline.first );
}
/* XXX move this into draw_context.c? */
#define EMIT_ATTR( VF_ATTR, STYLE, SIZE ) \
do { \
if (draw->nr_attrs >= 2) \
draw->vf_attr_to_slot[VF_ATTR] = draw->nr_attrs - 2; \
draw->attrs[draw->nr_attrs].attrib = VF_ATTR; \
/*draw->attrs[draw->nr_attrs].format = STYLE*/; \
draw->nr_attrs++; \
draw->vertex_size += SIZE; \
} while (0)
void
draw_set_vertex_attributes( struct draw_context *draw,
const unsigned *slot_to_vf_attr,
unsigned nr_attrs )
{
unsigned i;
memset(draw->vf_attr_to_slot, 0, sizeof(draw->vf_attr_to_slot));
draw->nr_attrs = 0;
draw->vertex_size = 0;
/*
* First three attribs are always the same: header, clip pos, winpos
*/
EMIT_ATTR(VF_ATTRIB_VERTEX_HEADER, EMIT_1F, 1);
EMIT_ATTR(VF_ATTRIB_CLIP_POS, EMIT_4F, 4);
assert(slot_to_vf_attr[0] == VF_ATTRIB_POS);
EMIT_ATTR(slot_to_vf_attr[0], EMIT_4F_VIEWPORT, 4);
/*
* Remaining attribs (color, texcoords, etc)
*/
for (i = 1; i < nr_attrs; i++)
EMIT_ATTR(slot_to_vf_attr[i], EMIT_4F, 4);
draw->vertex_size *= 4; /* floats to bytes */
}
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