src/mesa/shader/prog_execute.h

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