src/mesa/program/prog_uniform.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  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 /**
  26  * \file prog_uniform.c
  27  * Shader uniform functions.
  28  * \author Brian Paul
  29  */
  30
  31 #ifndef PROG_UNIFORM_H
  32 #define PROG_UNIFORM_H
  33
  34 #include "main/glheader.h"
  35
  36
  37 /**
  38  * Shader program uniform variable.
  39  * The glGetUniformLocation() and glUniform() commands will use this
  40  * information.
  41  * Note that a uniform such as "binormal" might be used in both the
  42  * vertex shader and the fragment shader.  When glUniform() is called to
  43  * set the uniform's value, it must be updated in both the vertex and
  44  * fragment shaders.  The uniform may be in different locations in the
  45  * two shaders so we keep track of that here.
  46  */
  47 struct gl_uniform
  48 {
  49    const char *Name;        /**< Null-terminated string */
  50    GLint VertPos;
  51    GLint FragPos;
  52    GLint GeomPos;
  53    GLboolean Initialized;   /**< For debug.  Has this uniform been set? */
  54    const struct glsl_type *Type;
  55 };
  56
  57
  58 /**
  59  * List of gl_uniforms
  60  */
  61 struct gl_uniform_list
  62 {
  63    GLuint Size;                 /**< allocated size of Uniforms array */
  64    GLuint NumUniforms;          /**< number of uniforms in the array */
  65    struct gl_uniform *Uniforms; /**< Array [Size] */
  66 };
  67
  68
  69 extern struct gl_uniform_list *
  70 _mesa_new_uniform_list(void);
  71
  72 extern void
  73 _mesa_free_uniform_list(struct gl_uniform_list *list);
  74
  75 extern struct gl_uniform *
  76 _mesa_append_uniform(struct gl_uniform_list *list,
  77                      const char *name, GLenum target, GLuint progPos);
  78
  79 extern GLint
  80 _mesa_lookup_uniform(const struct gl_uniform_list *list, const char *name);
  81
  82 extern GLint
  83 _mesa_longest_uniform_name(const struct gl_uniform_list *list);
  84
  85 extern void
  86 _mesa_print_uniforms(const struct gl_uniform_list *list);
  87
  88
  89 #endif /* PROG_UNIFORM_H */