/**************************************************************************
*
* 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.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
*/
#include "draw/draw_private.h"
#include "draw/draw_pipe.h"
#include "util/u_debug.h"
#include "util/u_math.h"
boolean draw_pipeline_init( struct draw_context *draw )
{
/* create pipeline stages */
draw->pipeline.wide_line = draw_wide_line_stage( draw );
draw->pipeline.wide_point = draw_wide_point_stage( draw );
draw->pipeline.stipple = draw_stipple_stage( draw );
draw->pipeline.unfilled = draw_unfilled_stage( draw );
draw->pipeline.twoside = draw_twoside_stage( draw );
draw->pipeline.offset = draw_offset_stage( draw );
draw->pipeline.clip = draw_clip_stage( draw );
draw->pipeline.flatshade = draw_flatshade_stage( draw );
draw->pipeline.cull = draw_cull_stage( draw );
draw->pipeline.validate = draw_validate_stage( draw );
draw->pipeline.first = draw->pipeline.validate;
if (!draw->pipeline.wide_line ||
!draw->pipeline.wide_point ||
!draw->pipeline.stipple ||
!draw->pipeline.unfilled ||
!draw->pipeline.twoside ||
!draw->pipeline.offset ||
!draw->pipeline.clip ||
!draw->pipeline.flatshade ||
!draw->pipeline.cull ||
!draw->pipeline.validate)
return FALSE;
/* these defaults are oriented toward the needs of softpipe */
draw->pipeline.wide_point_threshold = 1000000.0f; /* infinity */
draw->pipeline.wide_line_threshold = 1.0f;
draw->pipeline.wide_point_sprites = FALSE;
draw->pipeline.line_stipple = TRUE;
draw->pipeline.point_sprite = TRUE;
return TRUE;
}
void draw_pipeline_destroy( struct draw_context *draw )
{
if (draw->pipeline.wide_line)
draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
if (draw->pipeline.wide_point)
draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
if (draw->pipeline.stipple)
draw->pipeline.stipple->destroy( draw->pipeline.stipple );
if (draw->pipeline.unfilled)
draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
if (draw->pipeline.twoside)
draw->pipeline.twoside->destroy( draw->pipeline.twoside );
if (draw->pipeline.offset)
draw->pipeline.offset->destroy( draw->pipeline.offset );
if (draw->pipeline.clip)
draw->pipeline.clip->destroy( draw->pipeline.clip );
if (draw->pipeline.flatshade)
draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
if (draw->pipeline.cull)
draw->pipeline.cull->destroy( draw->pipeline.cull );
if (draw->pipeline.validate)
draw->pipeline.validate->destroy( draw->pipeline.validate );
if (draw->pipeline.aaline)
draw->pipeline.aaline->destroy( draw->pipeline.aaline );
if (draw->pipeline.aapoint)
draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
if (draw->pipeline.pstipple)
draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
if (draw->pipeline.rasterize)
draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
}
/**
* Build primitive to render a point with vertex at v0.
*/
static void do_point( struct draw_context *draw,
const char *v0 )
{
struct prim_header prim;
prim.flags = 0;
prim.pad = 0;
prim.v[0] = (struct vertex_header *)v0;
draw->pipeline.first->point( draw->pipeline.first, &prim );
}
/**
* Build primitive to render a line with vertices at v0, v1.
* \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
*/
static void do_line( struct draw_context *draw,
ushort flags,
const char *v0,
const char *v1 )
{
struct prim_header prim;
prim.flags = flags;
prim.pad = 0;
prim.v[0] = (struct vertex_header *)v0;
prim.v[1] = (struct vertex_header *)v1;
draw->pipeline.first->line( draw->pipeline.first, &prim );
}
/**
* Build primitive to render a triangle with vertices at v0, v1, v2.
* \param flags bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
*/
static void do_triangle( struct draw_context *draw,
ushort flags,
char *v0,
char *v1,
char *v2 )
{
struct prim_header prim;
prim.v[0] = (struct vertex_header *)v0;
prim.v[1] = (struct vertex_header *)v1;
prim.v[2] = (struct vertex_header *)v2;
prim.flags = flags;
prim.pad = 0;
draw->pipeline.first->tri( draw->pipeline.first, &prim );
}
/*
* Set up macros for draw_pt_decompose.h template code.
* This code uses vertex indexes / elements.
*/
#define TRIANGLE(flags,i0,i1,i2) \
do { \
do_triangle( draw, \
flags, \
verts + stride * (i0), \
verts + stride * (i1), \
verts + stride * (i2) ); \
} while (0)
#define LINE(flags,i0,i1) \
do { \
do_line( draw, \
flags, \
verts + stride * (i0), \
verts + stride * (i1) ); \
} while (0)
#define POINT(i0) \
do { \
do_point( draw, verts + stride * (i0) ); \
} while (0)
#define GET_ELT(idx) (MIN2(elts[idx], max_index))
#define FUNC pipe_run_elts
#define FUNC_VARS \
struct draw_context *draw, \
unsigned prim, \
unsigned prim_flags, \
struct vertex_header *vertices, \
unsigned stride, \
const ushort *elts, \
unsigned count, \
unsigned max_index
#include "draw_pt_decompose.h"
/**
* Code to run the pipeline on a fairly arbitrary collection of vertices.
* For drawing indexed primitives.
*
* Vertex headers must be pre-initialized with the
* UNDEFINED_VERTEX_ID, this code will cause that id to become
* overwritten, so it may have to be reset if there is the intention
* to reuse the vertices.
*
* This code provides a callback to reset the vertex id's which the
* draw_vbuf.c code uses when it has to perform a flush.
*/
void draw_pipeline_run( struct draw_context *draw,
const struct draw_vertex_info *vert_info,
const struct draw_prim_info *prim_info)
{
unsigned i, start;
draw->pipeline.verts = (char *)vert_info->verts;
draw->pipeline.vertex_stride = vert_info->stride;
draw->pipeline.vertex_count = vert_info->count;
for (start = i = 0;
i < prim_info->primitive_count;
start += prim_info->primitive_lengths[i], i++)
{
const unsigned count = prim_info->primitive_lengths[i];
#if DEBUG
/* Warn if one of the element indexes go outside the vertex buffer */
{
unsigned max_index = 0x0, i;
/* find the largest element index */
for (i = 0; i < count; i++) {
unsigned int index = prim_info->elts[start + i];
if (index > max_index)
max_index = index;
}
if (max_index >= vert_info->count) {
debug_printf("%s: max_index (%u) outside vertex buffer (%u)\n",
__FUNCTION__,
max_index,
vert_info->count);
}
}
#endif
pipe_run_elts(draw,
prim_info->prim,
prim_info->flags,
vert_info->verts,
vert_info->stride,
prim_info->elts + start,
count,
vert_info->count - 1);
}
draw->pipeline.verts = NULL;
draw->pipeline.vertex_count = 0;
}
/*
* Set up macros for draw_pt_decompose.h template code.
* This code is for non-indexed (aka linear) rendering (no elts).
*/
#define TRIANGLE(flags,i0,i1,i2) \
do_triangle( draw, flags, \
verts + stride * (i0), \
verts + stride * (i1), \
verts + stride * (i2) )
#define LINE(flags,i0,i1) \
do_line( draw, flags, \
verts + stride * (i0), \
verts + stride * (i1) )
#define POINT(i0) \
do_point( draw, verts + stride * (i0) )
#define GET_ELT(idx) (idx)
#define FUNC pipe_run_linear
#define FUNC_VARS \
struct draw_context *draw, \
unsigned prim, \
unsigned prim_flags, \
struct vertex_header *vertices, \
unsigned stride, \
unsigned count
#include "draw_pt_decompose.h"
/*
* For drawing non-indexed primitives.
*/
void draw_pipeline_run_linear( struct draw_context *draw,
const struct draw_vertex_info *vert_info,
const struct draw_prim_info *prim_info)
{
unsigned i, start;
for (start = i = 0;
i < prim_info->primitive_count;
start += prim_info->primitive_lengths[i], i++)
{
unsigned count = prim_info->primitive_lengths[i];
char *verts = ((char*)vert_info->verts) +
(start * vert_info->stride);
draw->pipeline.verts = verts;
draw->pipeline.vertex_stride = vert_info->stride;
draw->pipeline.vertex_count = count;
assert(count
<= vert_info
->count
);
pipe_run_linear(draw,
prim_info->prim,
prim_info->flags,
(struct vertex_header*)verts,
vert_info->stride,
count);
}
draw->pipeline.verts = NULL;
draw->pipeline.vertex_count = 0;
}
void draw_pipeline_flush( struct draw_context *draw,
unsigned flags )
{
draw->pipeline.first->flush( draw->pipeline.first, flags );
if (flags & DRAW_FLUSH_STATE_CHANGE)
draw->pipeline.first = draw->pipeline.validate;
}