src/mesa/program/prog_execute.h

   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/glheader.h"
  30 #include "compiler/shader_enums.h"
  31
  32 struct gl_context;
  33
  34 typedef void (*FetchTexelLodFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
  35                                   GLfloat lambda, GLuint unit, GLfloat color[4]);
  36
  37 typedef void (*FetchTexelDerivFunc)(struct gl_context *ctx, const GLfloat texcoord[4],
  38                                     const GLfloat texdx[4],
  39                                     const GLfloat texdy[4],
  40                                     GLfloat lodBias,
  41                                     GLuint unit, GLfloat color[4]);
  42
  43
  44 /** NOTE: This must match SWRAST_MAX_WIDTH */
  45 #define PROG_MAX_WIDTH 16384
  46
  47
  48 /**
  49  * Virtual machine state used during execution of vertex/fragment programs.
  50  */
  51 struct gl_program_machine
  52 {
  53    const struct gl_program *CurProgram;
  54
  55    /** Fragment Input attributes */
  56    GLfloat (*Attribs)[PROG_MAX_WIDTH][4];
  57    GLfloat (*DerivX)[4];
  58    GLfloat (*DerivY)[4];
  59    GLuint NumDeriv; /**< Max index into DerivX/Y arrays */
  60    GLuint CurElement; /**< Index into Attribs arrays */
  61
  62    /** Vertex Input attribs */
  63    GLfloat VertAttribs[VERT_ATTRIB_MAX][4];
  64
  65    GLfloat Temporaries[MAX_PROGRAM_TEMPS][4];
  66    GLfloat Outputs[MAX_PROGRAM_OUTPUTS][4];
  67    GLfloat (*EnvParams)[4]; /**< Vertex or Fragment env parameters */
  68    GLint AddressReg[MAX_PROGRAM_ADDRESS_REGS][4];
  69    GLfloat SystemValues[SYSTEM_VALUE_MAX][4];
  70
  71    const GLubyte *Samplers;  /** Array mapping sampler var to tex unit */
  72
  73    GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
  74    GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
  75
  76    /** Texture fetch functions */
  77    FetchTexelLodFunc FetchTexelLod;
  78    FetchTexelDerivFunc FetchTexelDeriv;
  79 };
  80
  81
  82 extern GLboolean
  83 _mesa_execute_program(struct gl_context *ctx,
  84                       const struct gl_program *program,
  85                       struct gl_program_machine *machine);
  86
  87
  88 #endif /* PROG_EXECUTE_H */