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/*
* Mesa 3-D graphics library
* Version: 6.5.3
*
* 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
* BRIAN PAUL 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 PROG_EXECUTE_H
#define PROG_EXECUTE_H
typedef void (*FetchTexelLodFunc)(GLcontext *ctx, const GLfloat texcoord[4],
GLfloat lambda, GLuint unit, GLfloat color[4]);
typedef void (*FetchTexelDerivFunc)(GLcontext *ctx, const GLfloat texcoord[4],
const GLfloat texdx[4],
const GLfloat texdy[4],
GLuint unit, GLfloat color[4]);
/** The larger of VERT_RESULT_MAX, FRAG_RESULT_MAX */
#define MAX_PROGRAM_OUTPUTS VERT_RESULT_MAX
/**
* Virtual machine state used during execution of vertex/fragment programs.
*/
struct gl_program_machine
{
const struct gl_program *CurProgram;
/** Fragment Input attributes */
GLfloat (*Attribs)[MAX_WIDTH][4];
GLfloat (*DerivX)[4];
GLfloat (*DerivY)[4];
GLuint NumDeriv; /**< Max index into DerivX/Y arrays */
GLuint CurElement; /**< Index into Attribs arrays */
/** Vertex Input attribs */
GLfloat VertAttribs[VERT_ATTRIB_MAX][4];
GLfloat Temporaries[MAX_PROGRAM_TEMPS][4];
GLfloat Outputs[MAX_PROGRAM_OUTPUTS][4];
GLfloat (*EnvParams)[4]; /**< Vertex or Fragment env parameters */
GLuint CondCodes[4]; /**< COND_* value for x/y/z/w */
GLint AddressReg[MAX_PROGRAM_ADDRESS_REGS][4];
GLuint *Samplers; /** Array mapping sampler var to tex unit */
GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
/** Texture fetch functions */
FetchTexelLodFunc FetchTexelLod;
FetchTexelDerivFunc FetchTexelDeriv;
};
extern void
_mesa_get_program_register(GLcontext *ctx, enum register_file file,
GLuint index, GLfloat val[4]);
extern GLboolean
_mesa_execute_program(GLcontext *ctx,
const struct gl_program *program,
struct gl_program_machine *machine);
#endif /* PROG_EXECUTE_H */
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