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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.
*/
/**
* \file program.c
* Vertex and fragment program support functions.
* \author Brian Paul
*/
/**
* \mainpage Mesa vertex and fragment program module
*
* This module or directory contains most of the code for vertex and
* fragment programs and shaders, including state management, parsers,
* and (some) software routines for executing programs
*/
#ifndef PROGRAM_H
#define PROGRAM_H
#include "main/compiler.h"
#include "main/mtypes.h"
#ifdef __cplusplus
extern "C" {
#endif
extern struct gl_program _mesa_DummyProgram;
extern void
_mesa_init_program(struct gl_context *ctx);
extern void
_mesa_free_program_data(struct gl_context *ctx);
extern void
_mesa_update_default_objects_program(struct gl_context *ctx);
extern void
_mesa_set_program_error(struct gl_context *ctx, GLint pos, const char *string);
extern const GLubyte *
_mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
GLint *line, GLint *col);
extern struct gl_program *
_mesa_init_vertex_program(struct gl_context *ctx,
struct gl_vertex_program *prog,
GLenum target, GLuint id);
extern struct gl_program *
_mesa_init_fragment_program(struct gl_context *ctx,
struct gl_fragment_program *prog,
GLenum target, GLuint id);
extern struct gl_program *
_mesa_init_geometry_program(struct gl_context *ctx,
struct gl_geometry_program *prog,
GLenum target, GLuint id);
extern struct gl_program *
_mesa_new_program(struct gl_context *ctx, GLenum target, GLuint id);
extern void
_mesa_delete_program(struct gl_context *ctx, struct gl_program *prog);
extern struct gl_program *
_mesa_lookup_program(struct gl_context *ctx, GLuint id);
extern void
_mesa_reference_program_(struct gl_context *ctx,
struct gl_program **ptr,
struct gl_program *prog);
static inline void
_mesa_reference_program(struct gl_context *ctx,
struct gl_program **ptr,
struct gl_program *prog)
{
if (*ptr != prog)
_mesa_reference_program_(ctx, ptr, prog);
}
static inline void
_mesa_reference_vertprog(struct gl_context *ctx,
struct gl_vertex_program **ptr,
struct gl_vertex_program *prog)
{
_mesa_reference_program(ctx, (struct gl_program **) ptr,
(struct gl_program *) prog);
}
static inline void
_mesa_reference_fragprog(struct gl_context *ctx,
struct gl_fragment_program **ptr,
struct gl_fragment_program *prog)
{
_mesa_reference_program(ctx, (struct gl_program **) ptr,
(struct gl_program *) prog);
}
static inline void
_mesa_reference_geomprog(struct gl_context *ctx,
struct gl_geometry_program **ptr,
struct gl_geometry_program *prog)
{
_mesa_reference_program(ctx, (struct gl_program **) ptr,
(struct gl_program *) prog);
}
extern struct gl_program *
_mesa_clone_program(struct gl_context *ctx, const struct gl_program *prog);
static inline struct gl_vertex_program *
_mesa_clone_vertex_program(struct gl_context *ctx,
const struct gl_vertex_program *prog)
{
return (struct gl_vertex_program *) _mesa_clone_program(ctx, &prog->Base);
}
static inline struct gl_geometry_program *
_mesa_clone_geometry_program(struct gl_context *ctx,
const struct gl_geometry_program *prog)
{
return (struct gl_geometry_program *) _mesa_clone_program(ctx, &prog->Base);
}
static inline struct gl_fragment_program *
_mesa_clone_fragment_program(struct gl_context *ctx,
const struct gl_fragment_program *prog)
{
return (struct gl_fragment_program *) _mesa_clone_program(ctx, &prog->Base);
}
extern GLboolean
_mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count);
extern GLboolean
_mesa_delete_instructions(struct gl_program *prog, GLuint start, GLuint count);
extern struct gl_program *
_mesa_combine_programs(struct gl_context *ctx,
const struct gl_program *progA,
const struct gl_program *progB);
extern void
_mesa_find_used_registers(const struct gl_program *prog,
gl_register_file file,
GLboolean used[], GLuint usedSize);
extern GLint
_mesa_find_free_register(const GLboolean used[],
GLuint maxRegs, GLuint firstReg);
extern GLboolean
_mesa_valid_register_index(const struct gl_context *ctx,
gl_shader_stage shaderType,
gl_register_file file, GLint index);
extern void
_mesa_postprocess_program(struct gl_context *ctx, struct gl_program *prog);
extern GLint
_mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
const struct gl_fragment_program *prog);
static inline GLuint
_mesa_program_enum_to_shader_stage(GLenum v)
{
switch (v) {
case GL_VERTEX_PROGRAM_ARB:
return MESA_SHADER_VERTEX;
case GL_FRAGMENT_PROGRAM_ARB:
return MESA_SHADER_FRAGMENT;
case GL_GEOMETRY_PROGRAM_NV:
return MESA_SHADER_GEOMETRY;
default:
ASSERT(0);
return ~0;
}
}
static inline GLenum
_mesa_shader_stage_to_program(gl_shader_stage stage)
{
switch (stage) {
case MESA_SHADER_VERTEX:
return GL_VERTEX_PROGRAM_ARB;
case MESA_SHADER_FRAGMENT:
return GL_FRAGMENT_PROGRAM_ARB;
case MESA_SHADER_GEOMETRY:
return GL_GEOMETRY_PROGRAM_NV;
}
assert(!"Unexpected shader stage in _mesa_shader_stage_to_program");
return GL_VERTEX_PROGRAM_ARB;
}
static inline GLenum
_mesa_program_index_to_target(GLuint i)
{
static const GLenum enums[] = {
GL_VERTEX_PROGRAM_ARB,
GL_GEOMETRY_PROGRAM_NV,
GL_FRAGMENT_PROGRAM_ARB
};
STATIC_ASSERT(Elements(enums) == MESA_SHADER_STAGES);
if(i >= MESA_SHADER_STAGES) {
assert(!"Unexpected program index");
return 0;
} else
return enums[i];
}
/* Cast wrappers from gl_program to gl_vertex/geometry/fragment_program */
static inline struct gl_fragment_program *
gl_fragment_program(struct gl_program *prog)
{
return (struct gl_fragment_program *) prog;
}
static inline const struct gl_fragment_program *
gl_fragment_program_const(const struct gl_program *prog)
{
return (const struct gl_fragment_program *) prog;
}
static inline struct gl_vertex_program *
gl_vertex_program(struct gl_program *prog)
{
return (struct gl_vertex_program *) prog;
}
static inline const struct gl_vertex_program *
gl_vertex_program_const(const struct gl_program *prog)
{
return (const struct gl_vertex_program *) prog;
}
static inline struct gl_geometry_program *
gl_geometry_program(struct gl_program *prog)
{
return (struct gl_geometry_program *) prog;
}
static inline const struct gl_geometry_program *
gl_geometry_program_const(const struct gl_program *prog)
{
return (const struct gl_geometry_program *) prog;
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* PROGRAM_H */
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