src/mesa/shader/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/mtypes.h"
  35 #include "prog_statevars.h"
  36
  37
  38 /**
  39  * Shader program uniform variable.
  40  * The glGetUniformLocation() and glUniform() commands will use this
  41  * information.
  42  * Note that a uniform such as "binormal" might be used in both the
  43  * vertex shader and the fragment shader.  When glUniform() is called to
  44  * set the uniform's value, it must be updated in both the vertex and
  45  * fragment shaders.  The uniform may be in different locations in the
  46  * two shaders so we keep track of that here.
  47  */
  48 struct gl_uniform
  49 {
  50    const char *Name;        /**< Null-terminated string */
  51    GLint VertPos;
  52    GLint FragPos;
  53    GLboolean Initialized;   /**< For debug.  Has this uniform been set? */
  54 #if 0
  55    GLenum DataType;         /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
  56    GLuint Size;             /**< Number of components (1..4) */
  57 #endif
  58 };
  59
  60
  61 /**
  62  * List of gl_uniforms
  63  */
  64 struct gl_uniform_list
  65 {
  66    GLuint Size;                 /**< allocated size of Uniforms array */
  67    GLuint NumUniforms;          /**< number of uniforms in the array */
  68    struct gl_uniform *Uniforms; /**< Array [Size] */
  69 };
  70
  71
  72 extern struct gl_uniform_list *
  73 _mesa_new_uniform_list(void);
  74
  75 extern void
  76 _mesa_free_uniform_list(struct gl_uniform_list *list);
  77
  78 extern struct gl_uniform *
  79 _mesa_append_uniform(struct gl_uniform_list *list,
  80                      const char *name, GLenum target, GLuint progPos);
  81
  82 extern GLint
  83 _mesa_lookup_uniform(const struct gl_uniform_list *list, const char *name);
  84
  85 extern GLint
  86 _mesa_longest_uniform_name(const struct gl_uniform_list *list);
  87
  88 extern void
  89 _mesa_print_uniforms(const struct gl_uniform_list *list);
  90
  91
  92 #endif /* PROG_UNIFORM_H */