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/**************************************************************************
*
* Copyright 2008 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.
*
**************************************************************************/
#include "util/u_math.h"
#include "util/u_memory.h"
#include "draw/draw_context.h"
#include "draw/draw_private.h"
#include "draw/draw_pt.h"
#define FETCH_MAX 256
#define DRAW_MAX (FETCH_MAX+8)
struct varray_frontend {
struct draw_pt_front_end base;
struct draw_context *draw;
ushort draw_elts[DRAW_MAX];
unsigned fetch_elts[FETCH_MAX];
unsigned driver_fetch_max;
unsigned fetch_max;
struct draw_pt_middle_end *middle;
unsigned input_prim;
unsigned output_prim;
};
static void varray_flush_linear(struct varray_frontend *varray,
unsigned start, unsigned count)
{
if (count) {
assert(varray->middle->run_linear);
varray->middle->run_linear(varray->middle, start, count);
}
}
static void varray_line_loop_segment(struct varray_frontend *varray,
unsigned start,
unsigned segment_start,
unsigned segment_count,
boolean end )
{
assert(segment_count < varray->fetch_max);
if (segment_count >= 1) {
unsigned nr = 0, i;
for (i = 0; i < segment_count; i++)
varray->fetch_elts[nr++] = start + segment_start + i;
if (end)
varray->fetch_elts[nr++] = start;
assert(nr <= FETCH_MAX);
varray->middle->run(varray->middle,
varray->fetch_elts,
nr,
varray->draw_elts, /* ie. linear */
nr);
}
}
static void varray_fan_segment(struct varray_frontend *varray,
unsigned start,
unsigned segment_start,
unsigned segment_count )
{
assert(segment_count < varray->fetch_max);
if (segment_count >= 2) {
unsigned nr = 0, i;
if (segment_start != 0)
varray->fetch_elts[nr++] = start;
for (i = 0 ; i < segment_count; i++)
varray->fetch_elts[nr++] = start + segment_start + i;
assert(nr <= FETCH_MAX);
varray->middle->run(varray->middle,
varray->fetch_elts,
nr,
varray->draw_elts, /* ie. linear */
nr);
}
}
#define FUNC varray_run
#include "draw_pt_varray_tmp_linear.h"
static unsigned decompose_prim[PIPE_PRIM_POLYGON + 1] = {
PIPE_PRIM_POINTS,
PIPE_PRIM_LINES,
PIPE_PRIM_LINE_STRIP, /* decomposed LINELOOP */
PIPE_PRIM_LINE_STRIP,
PIPE_PRIM_TRIANGLES,
PIPE_PRIM_TRIANGLE_STRIP,
PIPE_PRIM_TRIANGLE_FAN,
PIPE_PRIM_QUADS,
PIPE_PRIM_QUAD_STRIP,
PIPE_PRIM_POLYGON
};
static void varray_prepare(struct draw_pt_front_end *frontend,
unsigned prim,
struct draw_pt_middle_end *middle,
unsigned opt)
{
struct varray_frontend *varray = (struct varray_frontend *)frontend;
varray->base.run = varray_run;
varray->input_prim = prim;
varray->output_prim = decompose_prim[prim];
varray->middle = middle;
middle->prepare(middle, varray->output_prim, opt, &varray->driver_fetch_max );
/* check that the max is even */
assert((varray->driver_fetch_max & 1) == 0);
varray->fetch_max = MIN2(FETCH_MAX, varray->driver_fetch_max);
}
static void varray_finish(struct draw_pt_front_end *frontend)
{
struct varray_frontend *varray = (struct varray_frontend *)frontend;
varray->middle->finish(varray->middle);
varray->middle = NULL;
}
static void varray_destroy(struct draw_pt_front_end *frontend)
{
FREE(frontend);
}
struct draw_pt_front_end *draw_pt_varray(struct draw_context *draw)
{
ushort i;
struct varray_frontend *varray = CALLOC_STRUCT(varray_frontend);
if (varray == NULL)
return NULL;
varray->base.prepare = varray_prepare;
varray->base.run = NULL;
varray->base.finish = varray_finish;
varray->base.destroy = varray_destroy;
varray->draw = draw;
for (i = 0; i < DRAW_MAX; i++) {
varray->draw_elts[i] = i;
}
return &varray->base;
}
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