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/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
* (C) Copyright IBM Corporation 2006
* Copyright (C) 2009 VMware, 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
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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 ARRAYOBJ_H
#define ARRAYOBJ_H
#include "glheader.h"
#include "mtypes.h"
#include "glformats.h"
struct gl_context;
/**
* \file arrayobj.h
* Functions for the GL_ARB_vertex_array_object extension.
*
* \author Ian Romanick <idr@us.ibm.com>
* \author Brian Paul
*/
/*
* Internal functions
*/
extern struct gl_vertex_array_object *
_mesa_lookup_vao(struct gl_context *ctx, GLuint id);
extern struct gl_vertex_array_object *
_mesa_lookup_vao_err(struct gl_context *ctx, GLuint id, const char *caller);
extern struct gl_vertex_array_object *
_mesa_new_vao(struct gl_context *ctx, GLuint name);
extern void
_mesa_delete_vao(struct gl_context *ctx, struct gl_vertex_array_object *obj);
extern void
_mesa_reference_vao_(struct gl_context *ctx,
struct gl_vertex_array_object **ptr,
struct gl_vertex_array_object *vao);
static inline void
_mesa_reference_vao(struct gl_context *ctx,
struct gl_vertex_array_object **ptr,
struct gl_vertex_array_object *vao)
{
if (*ptr != vao)
_mesa_reference_vao_(ctx, ptr, vao);
}
extern void
_mesa_initialize_vao(struct gl_context *ctx,
struct gl_vertex_array_object *obj, GLuint name);
extern void
_mesa_update_vao_derived_arrays(struct gl_context *ctx,
struct gl_vertex_array_object *vao);
/* Returns true if all varying arrays reside in vbos */
extern bool
_mesa_all_varyings_in_vbos(const struct gl_vertex_array_object *vao);
/* Returns true if all vbos are unmapped */
extern bool
_mesa_all_buffers_are_unmapped(const struct gl_vertex_array_object *vao);
/**
* Array to apply the position/generic0 aliasing map to
* an attribute value used in vertex processing inputs to an attribute
* as they appear in the vao.
*/
extern const GLubyte
_mesa_vao_attribute_map[ATTRIBUTE_MAP_MODE_MAX][VERT_ATTRIB_MAX];
/**
* Depending on the position and generic0 attributes enable flags select
* the one that is used for both attributes.
* The generic0 attribute takes precedence.
*/
static inline void
_mesa_update_attribute_map_mode(const struct gl_context *ctx,
struct gl_vertex_array_object *vao)
{
/*
* There is no need to change the mapping away from the
* identity mapping if we are not in compat mode.
*/
if (ctx->API != API_OPENGL_COMPAT)
return;
/* The generic0 attribute superseeds the position attribute */
const GLbitfield enabled = vao->_Enabled;
if (enabled & VERT_BIT_GENERIC0)
vao->_AttributeMapMode = ATTRIBUTE_MAP_MODE_GENERIC0;
else if (enabled & VERT_BIT_POS)
vao->_AttributeMapMode = ATTRIBUTE_MAP_MODE_POSITION;
else
vao->_AttributeMapMode = ATTRIBUTE_MAP_MODE_IDENTITY;
}
/**
* Apply the position/generic0 aliasing map to a bitfield from the vao.
* Use for example to convert gl_vertex_array_object::_Enabled
* or gl_vertex_buffer_binding::_VertexBinding from the vao numbering to
* the numbering used with vertex processing inputs.
*/
static inline GLbitfield
_mesa_vao_enable_to_vp_inputs(gl_attribute_map_mode mode, GLbitfield enabled)
{
switch (mode) {
case ATTRIBUTE_MAP_MODE_IDENTITY:
return enabled;
case ATTRIBUTE_MAP_MODE_POSITION:
/* Copy VERT_ATTRIB_POS enable bit into GENERIC0 position */
return (enabled & ~VERT_BIT_GENERIC0)
| ((enabled & VERT_BIT_POS) << VERT_ATTRIB_GENERIC0);
case ATTRIBUTE_MAP_MODE_GENERIC0:
/* Copy VERT_ATTRIB_GENERIC0 enable bit into POS position */
return (enabled & ~VERT_BIT_POS)
| ((enabled & VERT_BIT_GENERIC0) >> VERT_ATTRIB_GENERIC0);
default:
return 0;
}
}
/**
* Return the vp_inputs enabled bitmask after application of
* the position/generic0 aliasing map.
*/
static inline GLbitfield
_mesa_get_vao_vp_inputs(const struct gl_vertex_array_object *vao)
{
const gl_attribute_map_mode mode = vao->_AttributeMapMode;
return _mesa_vao_enable_to_vp_inputs(mode, vao->_Enabled);
}
/*
* API functions
*/
void GLAPIENTRY
_mesa_BindVertexArray_no_error(GLuint id);
void GLAPIENTRY _mesa_BindVertexArray( GLuint id );
void GLAPIENTRY
_mesa_DeleteVertexArrays_no_error(GLsizei n, const GLuint *ids);
void GLAPIENTRY _mesa_DeleteVertexArrays(GLsizei n, const GLuint *ids);
void GLAPIENTRY
_mesa_GenVertexArrays_no_error(GLsizei n, GLuint *arrays);
void GLAPIENTRY _mesa_GenVertexArrays(GLsizei n, GLuint *arrays);
void GLAPIENTRY
_mesa_CreateVertexArrays_no_error(GLsizei n, GLuint *arrays);
void GLAPIENTRY _mesa_CreateVertexArrays(GLsizei n, GLuint *arrays);
GLboolean GLAPIENTRY _mesa_IsVertexArray( GLuint id );
void GLAPIENTRY
_mesa_VertexArrayElementBuffer_no_error(GLuint vaobj, GLuint buffer);
void GLAPIENTRY _mesa_VertexArrayElementBuffer(GLuint vaobj, GLuint buffer);
void GLAPIENTRY _mesa_GetVertexArrayiv(GLuint vaobj, GLenum pname, GLint *param);
#endif /* ARRAYOBJ_H */
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