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  1. /*
  2.  * Mesa 3-D graphics library
  3.  * Version:  7.0.3
  4.  *
  5.  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  6.  *
  7.  * Permission is hereby granted, free of charge, to any person obtaining a
  8.  * copy of this software and associated documentation files (the "Software"),
  9.  * to deal in the Software without restriction, including without limitation
  10.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11.  * and/or sell copies of the Software, and to permit persons to whom the
  12.  * Software is furnished to do so, subject to the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice shall be included
  15.  * in all copies or substantial portions of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20.  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21.  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23.  */
  24.  
  25. #ifndef PROG_EXECUTE_H
  26. #define PROG_EXECUTE_H
  27.  
  28. #include "main/config.h"
  29. #include "main/mtypes.h"
  30.  
  31.  
  32. typedef void (*FetchTexelLodFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
  33.                                   GLfloat lambda, GLuint unit, GLfloat color[4]);
  34.  
  35. typedef void (*FetchTexelDerivFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
  36.                                     const GLfloat texdx[4],
  37.                                     const GLfloat texdy[4],
  38.                                     GLfloat lodBias,
  39.                                     GLuint unit, GLfloat color[4]);
  40.  
  41.  
  42. /**
  43.  * Virtual machine state used during execution of vertex/fragment programs.
  44.  */
  45. struct gl_program_machine
  46. {
  47.    const struct gl_program *CurProgram;
  48.  
  49.    /** Fragment Input attributes */
  50.    GLfloat (*Attribs)[MAX_WIDTH][4];
  51.    GLfloat (*DerivX)[4];
  52.    GLfloat (*DerivY)[4];
  53.    GLuint NumDeriv; /**< Max index into DerivX/Y arrays */
  54.    GLuint CurElement; /**< Index into Attribs arrays */
  55.  
  56.    /** Vertex Input attribs */
  57.    GLfloat VertAttribs[VERT_ATTRIB_MAX][4];
  58.  
  59.    GLfloat Temporaries[MAX_PROGRAM_TEMPS][4];
  60.    GLfloat Outputs[MAX_PROGRAM_OUTPUTS][4];
  61.    GLfloat (*EnvParams)[4]; /**< Vertex or Fragment env parameters */
  62.    GLuint CondCodes[4];  /**< COND_* value for x/y/z/w */
  63.    GLint AddressReg[MAX_PROGRAM_ADDRESS_REGS][4];
  64.  
  65.    const GLubyte *Samplers;  /** Array mapping sampler var to tex unit */
  66.  
  67.    GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
  68.    GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
  69.  
  70.    /** Texture fetch functions */
  71.    FetchTexelLodFunc FetchTexelLod;
  72.    FetchTexelDerivFunc FetchTexelDeriv;
  73. };
  74.  
  75.  
  76. extern void
  77. _mesa_get_program_register(struct gl_context *ctx, gl_register_file file,
  78.                            GLuint index, GLfloat val[4]);
  79.  
  80. extern GLboolean
  81. _mesa_execute_program(struct gl_context *ctx,
  82.                       const struct gl_program *program,
  83.                       struct gl_program_machine *machine);
  84.  
  85.  
  86. #endif /* PROG_EXECUTE_H */
  87.