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/*
* Copyright 2008 Tungsten Graphics, inc.
* 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
* on 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 THEIR 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.
*/
/**
* Vertex fetch/store/convert code. This functionality is used in two places:
* 1. Vertex fetch/convert - to grab vertex data from incoming vertex
* arrays and convert to format needed by vertex shaders.
* 2. Vertex store/emit - to convert simple float[][4] vertex attributes
* (which is the organization used throughout the draw/prim pipeline) to
* hardware-specific formats and emit into hardware vertex buffers.
*
*
* Authors:
* Keith Whitwell <keithw@tungstengraphics.com>
*/
#ifndef DRAW_VF_H
#define DRAW_VF_H
#include "pipe/p_compiler.h"
#include "pipe/p_state.h"
#include "draw_vertex.h"
#include "draw_private.h" /* for vertex_header */
enum draw_vf_attr_format {
DRAW_EMIT_1F,
DRAW_EMIT_2F,
DRAW_EMIT_3F,
DRAW_EMIT_4F,
DRAW_EMIT_3F_XYW, /**< for projective texture */
DRAW_EMIT_1UB_1F, /**< for fog coordinate */
DRAW_EMIT_3UB_3F_RGB, /**< for specular color */
DRAW_EMIT_3UB_3F_BGR, /**< for specular color */
DRAW_EMIT_4UB_4F_RGBA, /**< for color */
DRAW_EMIT_4UB_4F_BGRA, /**< for color */
DRAW_EMIT_4UB_4F_ARGB, /**< for color */
DRAW_EMIT_4UB_4F_ABGR, /**< for color */
DRAW_EMIT_1F_CONST,
DRAW_EMIT_2F_CONST,
DRAW_EMIT_3F_CONST,
DRAW_EMIT_4F_CONST,
DRAW_EMIT_PAD, /**< leave a hole of 'offset' bytes */
DRAW_EMIT_MAX
};
struct draw_vf_attr_map
{
/** Input attribute number */
unsigned attrib;
enum draw_vf_attr_format format;
unsigned offset;
/**
* Constant data for DRAW_EMIT_*_CONST
*/
union {
uint8_t ub[4];
float f[4];
} data;
};
struct draw_vertex_fetch;
#if 0
unsigned
draw_vf_set_vertex_attributes( struct draw_vertex_fetch *vf,
const struct draw_vf_attr_map *map,
unsigned nr,
unsigned vertex_stride );
#endif
void draw_vf_set_vertex_info( struct draw_vertex_fetch *vf,
const struct vertex_info *vinfo,
float point_size );
#if 0
void
draw_vf_set_sources( struct draw_vertex_fetch *vf,
GLvector4f * const attrib[],
unsigned start );
#endif
void
draw_vf_emit_vertex( struct draw_vertex_fetch *vf,
struct vertex_header *vertex,
void *dest );
struct draw_vertex_fetch *
draw_vf_create( void );
void
draw_vf_destroy( struct draw_vertex_fetch *vf );
/***********************************************************************
* Internal functions and structs:
*/
struct draw_vf_attr;
typedef void (*draw_vf_extract_func)( const struct draw_vf_attr *a,
float *out,
const uint8_t *v );
typedef void (*draw_vf_insert_func)( const struct draw_vf_attr *a,
uint8_t *v,
const float *in );
typedef void (*draw_vf_emit_func)( struct draw_vertex_fetch *vf,
unsigned count,
uint8_t *dest );
/**
* Describes how to convert/move a vertex attribute from a vertex
* array to a vertex structure.
*/
struct draw_vf_attr
{
struct draw_vertex_fetch *vf;
unsigned format;
unsigned inputsize;
unsigned inputstride;
unsigned vertoffset; /**< position of the attrib in the vertex struct */
boolean isconst; /**< read from const data below */
uint8_t data[16];
unsigned attrib; /**< which vertex attrib (0=position, etc) */
unsigned vertattrsize; /**< size of the attribute in bytes */
uint8_t *inputptr;
const draw_vf_insert_func *insert;
draw_vf_insert_func do_insert;
draw_vf_extract_func extract;
};
struct draw_vertex_fetch
{
struct draw_vf_attr attr[PIPE_ATTRIB_MAX];
unsigned attr_count;
unsigned vertex_stride;
draw_vf_emit_func emit;
/* Parameters and constants for codegen:
*/
float identity[4];
struct draw_vf_fastpath *fastpath;
void (*codegen_emit)( struct draw_vertex_fetch *vf );
};
struct draw_vf_attr_type {
unsigned format;
unsigned size;
unsigned stride;
unsigned offset;
};
/** XXX this could be moved into draw_vf.c */
struct draw_vf_fastpath {
unsigned vertex_stride;
unsigned attr_count;
boolean match_strides;
struct draw_vf_attr_type *attr;
draw_vf_emit_func func;
struct draw_vf_fastpath *next;
};
void
draw_vf_register_fastpath( struct draw_vertex_fetch *vtx,
boolean match_strides );
void
draw_vf_generic_emit( struct draw_vertex_fetch *vf,
unsigned count,
uint8_t *v );
void
draw_vf_generate_hardwired_emit( struct draw_vertex_fetch *vf );
void
draw_vf_generate_sse_emit( struct draw_vertex_fetch *vf );
/** XXX this type and function could probably be moved into draw_vf.c */
struct draw_vf_format_info {
const char *name;
draw_vf_insert_func insert[4];
const unsigned attrsize;
const boolean isconst;
};
extern const struct draw_vf_format_info
draw_vf_format_info[DRAW_EMIT_MAX];
#endif
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