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  1. /*
  2.  * Mesa 3-D graphics library
  3.  *
  4.  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the "Software"),
  8.  * to deal in the Software without restriction, including without limitation
  9.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10.  * and/or sell copies of the Software, and to permit persons to whom the
  11.  * Software is furnished to do so, subject to the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice shall be included
  14.  * in all copies or substantial portions of the Software.
  15.  *
  16.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20.  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21.  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22.  * 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. /** NOTE: This must match SWRAST_MAX_WIDTH */
  43. #define PROG_MAX_WIDTH 16384
  44.  
  45.  
  46. /**
  47.  * Virtual machine state used during execution of vertex/fragment programs.
  48.  */
  49. struct gl_program_machine
  50. {
  51.    const struct gl_program *CurProgram;
  52.  
  53.    /** Fragment Input attributes */
  54.    GLfloat (*Attribs)[PROG_MAX_WIDTH][4];
  55.    GLfloat (*DerivX)[4];
  56.    GLfloat (*DerivY)[4];
  57.    GLuint NumDeriv; /**< Max index into DerivX/Y arrays */
  58.    GLuint CurElement; /**< Index into Attribs arrays */
  59.  
  60.    /** Vertex Input attribs */
  61.    GLfloat VertAttribs[VERT_ATTRIB_MAX][4];
  62.  
  63.    GLfloat Temporaries[MAX_PROGRAM_TEMPS][4];
  64.    GLfloat Outputs[MAX_PROGRAM_OUTPUTS][4];
  65.    GLfloat (*EnvParams)[4]; /**< Vertex or Fragment env parameters */
  66.    GLuint CondCodes[4];  /**< COND_* value for x/y/z/w */
  67.    GLint AddressReg[MAX_PROGRAM_ADDRESS_REGS][4];
  68.    GLfloat SystemValues[SYSTEM_VALUE_MAX][4];
  69.  
  70.    const GLubyte *Samplers;  /** Array mapping sampler var to tex unit */
  71.  
  72.    GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
  73.    GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
  74.  
  75.    /** Texture fetch functions */
  76.    FetchTexelLodFunc FetchTexelLod;
  77.    FetchTexelDerivFunc FetchTexelDeriv;
  78. };
  79.  
  80.  
  81. extern void
  82. _mesa_get_program_register(struct gl_context *ctx, gl_register_file file,
  83.                            GLuint index, GLfloat val[4]);
  84.  
  85. extern GLboolean
  86. _mesa_execute_program(struct gl_context *ctx,
  87.                       const struct gl_program *program,
  88.                       struct gl_program_machine *machine);
  89.  
  90.  
  91. #endif /* PROG_EXECUTE_H */
  92.