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/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2007 Brian Paul 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.
*
* Authors:
* Keith Whitwell <keithw@vmware.com>
*/
#ifndef _TNL_H
#define _TNL_H
#include "main/glheader.h"
struct gl_context;
struct gl_program;
struct gl_buffer_object;
struct gl_transform_feedback_object;
struct dd_function_table;
/* These are the public-access functions exported from tnl. (A few
* more are currently hooked into dispatch directly by the module
* itself.)
*/
extern GLboolean
_tnl_CreateContext( struct gl_context *ctx );
extern void
_tnl_DestroyContext( struct gl_context *ctx );
extern void
_tnl_InvalidateState( struct gl_context *ctx, GLuint new_state );
extern void
_tnl_init_driver_draw_function(struct dd_function_table *functions);
/* Functions to revive the tnl module after being unhooked from
* dispatch and/or driver callbacks.
*/
extern void
_tnl_wakeup( struct gl_context *ctx );
/* Driver configuration options:
*/
extern void
_tnl_need_projected_coords( struct gl_context *ctx, GLboolean flag );
/**
* Vertex array information which is derived from gl_array_attributes
* and gl_vertex_buffer_binding information. Used by the TNL module and
* device drivers.
*/
struct tnl_vertex_array
{
/** Vertex attribute array */
const struct gl_array_attributes *VertexAttrib;
/** Vertex buffer binding */
const struct gl_vertex_buffer_binding *BufferBinding;
};
extern const struct tnl_vertex_array*
_tnl_bind_inputs( struct gl_context *ctx );
/* Control whether T&L does per-vertex fog
*/
extern void
_tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value );
extern void
_tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value );
extern GLboolean
_tnl_program_string(struct gl_context *ctx, GLenum target, struct gl_program *program);
struct _mesa_prim;
struct _mesa_index_buffer;
void
_tnl_draw_prims(struct gl_context *ctx,
const struct tnl_vertex_array *arrays,
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid,
GLuint min_index,
GLuint max_index,
struct gl_transform_feedback_object *tfb_vertcount,
unsigned stream);
void
_tnl_draw(struct gl_context *ctx,
const struct _mesa_prim *prim, GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid, GLuint min_index, GLuint max_index,
struct gl_transform_feedback_object *tfb_vertcount, unsigned stream);
extern void
_tnl_RasterPos(struct gl_context *ctx, const GLfloat vObj[4]);
extern void
_tnl_validate_shine_tables( struct gl_context *ctx );
/**
* For indirect array drawing:
*
* typedef struct {
* GLuint count;
* GLuint primCount;
* GLuint first;
* GLuint baseInstance; // in GL 4.2 and later, must be zero otherwise
* } DrawArraysIndirectCommand;
*
* For indirect indexed drawing:
*
* typedef struct {
* GLuint count;
* GLuint primCount;
* GLuint firstIndex;
* GLint baseVertex;
* GLuint baseInstance; // in GL 4.2 and later, must be zero otherwise
* } DrawElementsIndirectCommand;
*/
/**
* Draw a number of primitives.
* \param prims array [nr_prims] describing what to draw (prim type,
* vertex count, first index, instance count, etc).
* \param arrays array of vertex arrays for draw
* \param ib index buffer for indexed drawing, NULL for array drawing
* \param index_bounds_valid are min_index and max_index valid?
* \param min_index lowest vertex index used
* \param max_index highest vertex index used
* \param tfb_vertcount if non-null, indicates which transform feedback
* object has the vertex count.
* \param tfb_stream If called via DrawTransformFeedbackStream, specifies the
* vertex stream buffer from which to get the vertex count.
* \param indirect If any prims are indirect, this specifies the buffer
* to find the "DrawArrays/ElementsIndirectCommand" data.
* This may be deprecated in the future
*/
typedef void (*tnl_draw_func)(struct gl_context *ctx,
const struct tnl_vertex_array* arrays,
const struct _mesa_prim *prims,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid,
GLuint min_index,
GLuint max_index,
struct gl_transform_feedback_object *tfb_vertcount,
unsigned tfb_stream);
/* Utility function to cope with various constraints on tnl modules or
* hardware. This can be used to split an incoming set of arrays and
* primitives against the following constraints:
* - Maximum number of indices in index buffer.
* - Maximum number of vertices referenced by index buffer.
* - Maximum hardware vertex buffer size.
*/
struct split_limits
{
GLuint max_verts;
GLuint max_indices;
GLuint max_vb_size; /* bytes */
};
void
_tnl_split_prims(struct gl_context *ctx,
const struct tnl_vertex_array *arrays,
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLuint min_index,
GLuint max_index,
tnl_draw_func draw,
const struct split_limits *limits);
#endif
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