text: /* San Angeles Observation OpenGL ES version example
   * Copyright 2004-2005 Jetro Lauha
   * All rights reserved.
   * Web: http://iki.fi/jetro/
   *
   * This source is free software; you can redistribute it and/or
   * modify it under the terms of EITHER:
   *   (1) The GNU Lesser General Public License as published by the Free
   *       Software Foundation; either version 2.1 of the License, or (at
   *       your option) any later version. The text of the GNU Lesser
   *       General Public License is included with this source in the
   *       file LICENSE-LGPL.txt.
   *   (2) The BSD-style license that is included with this source in
   *       the file LICENSE-BSD.txt.
   *
   * This source is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files
   * LICENSE-LGPL.txt and LICENSE-BSD.txt for more details.
   *
   * $Id: importgl.h,v 1.4 2005/02/24 20:29:33 tonic Exp $
   * $Revision: 1.4 $
   */
  
  #ifndef IMPORTGL_H_INCLUDED
  #define IMPORTGL_H_INCLUDED
  
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  
  #include <GLES/gl.h>
  #include <GLES/egl.h>
  
  
  /* Use DISABLE_IMPORTGL if you want to link the OpenGL ES at
   * compile/link time and not import it dynamically runtime.
   */
  #ifndef DISABLE_IMPORTGL
  
  
  /* Dynamically fetches pointers to the egl & gl functions.
   * Should be called once on application initialization.
   * Returns non-zero on success and 0 on failure.
   */
  extern int importGLInit();
  
  /* Frees the handle to egl & gl functions library.
   */
  extern void importGLDeinit();
  
  
  #ifndef IMPORTGL_API
  #define IMPORTGL_API extern
  #endif
  #ifndef IMPORTGL_FNPTRINIT
  #define IMPORTGL_FNPTRINIT
  #endif
  
  #define FNDEF(retType, funcName, args) IMPORTGL_API retType (*funcPtr_##funcName) args IMPORTGL_FNPTRINIT
  
  
  FNDEF(EGLBoolean, eglChooseConfig, (EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config));
  FNDEF(EGLContext, eglCreateContext, (EGLDisplay dpy, EGLConfig config, EGLContext share_list, const EGLint *attrib_list));
  FNDEF(EGLSurface, eglCreateWindowSurface, (EGLDisplay dpy, EGLConfig config, NativeWindowType window, const EGLint *attrib_list));
  FNDEF(EGLBoolean, eglDestroyContext, (EGLDisplay dpy, EGLContext ctx));
  FNDEF(EGLBoolean, eglDestroySurface, (EGLDisplay dpy, EGLSurface surface));
  FNDEF(EGLBoolean, eglGetConfigAttrib, (EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value));
  FNDEF(EGLBoolean, eglGetConfigs, (EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config));
  FNDEF(EGLDisplay, eglGetDisplay, (NativeDisplayType display));
  FNDEF(EGLint, eglGetError, (void));
  FNDEF(EGLBoolean, eglInitialize, (EGLDisplay dpy, EGLint *major, EGLint *minor));
  FNDEF(EGLBoolean, eglMakeCurrent, (EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx));
  FNDEF(EGLBoolean, eglSwapBuffers, (EGLDisplay dpy, EGLSurface draw));
  FNDEF(EGLBoolean, eglTerminate, (EGLDisplay dpy));
  
  FNDEF(void, glBlendFunc, (GLenum sfactor, GLenum dfactor));
  FNDEF(void, glClear, (GLbitfield mask));
  FNDEF(void, glClearColorx, (GLclampx red, GLclampx green, GLclampx blue, GLclampx alpha));
  FNDEF(void, glColor4x, (GLfixed red, GLfixed green, GLfixed blue, GLfixed alpha));
  FNDEF(void, glColorPointer, (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer));
  FNDEF(void, glDisable, (GLenum cap));
  FNDEF(void, glDisableClientState, (GLenum array));
  FNDEF(void, glDrawArrays, (GLenum mode, GLint first, GLsizei count));
  FNDEF(void, glEnable, (GLenum cap));
  FNDEF(void, glEnableClientState, (GLenum array));
  FNDEF(void, glFrustumx, (GLfixed left, GLfixed right, GLfixed bottom, GLfixed top, GLfixed zNear, GLfixed zFar));
  FNDEF(GLenum, glGetError, (void));
  FNDEF(void, glLightxv, (GLenum light, GLenum pname, const GLfixed *params));
  FNDEF(void, glLoadIdentity, (void));
  FNDEF(void, glMaterialx, (GLenum face, GLenum pname, GLfixed param));
  FNDEF(void, glMaterialxv, (GLenum face, GLenum pname, const GLfixed *params));
  FNDEF(void, glMatrixMode, (GLenum mode));
  FNDEF(void, glMultMatrixx, (const GLfixed *m));
  FNDEF(void, glNormalPointer, (GLenum type, GLsizei stride, const GLvoid *pointer));
  FNDEF(void, glPopMatrix, (void));
  FNDEF(void, glPushMatrix, (void));
  FNDEF(void, glRotatex, (GLfixed angle, GLfixed x, GLfixed y, GLfixed z));
  FNDEF(void, glScalex, (GLfixed x, GLfixed y, GLfixed z));
  FNDEF(void, glShadeModel, (GLenum mode));
  FNDEF(void, glTranslatex, (GLfixed x, GLfixed y, GLfixed z));
  FNDEF(void, glVertexPointer, (GLint size, GLenum type, GLsizei stride, const GLvoid *pointer));
  FNDEF(void, glViewport, (GLint x, GLint y, GLsizei width, GLsizei height));
  
  
  #undef FN
  #define FNPTR(name) funcPtr_##name
  
  #ifndef IMPORTGL_NO_FNPTR_DEFS
  
  // Redirect egl* and gl* function calls to funcPtr_egl* and funcPtr_gl*.
  
  #define eglChooseConfig         FNPTR(eglChooseConfig)
  #define eglCreateContext        FNPTR(eglCreateContext)
  #define eglCreateWindowSurface  FNPTR(eglCreateWindowSurface)
  #define eglDestroyContext       FNPTR(eglDestroyContext)
  #define eglDestroySurface       FNPTR(eglDestroySurface)
  #define eglGetConfigAttrib      FNPTR(eglGetConfigAttrib)
  #define eglGetConfigs           FNPTR(eglGetConfigs)
  #define eglGetDisplay           FNPTR(eglGetDisplay)
  #define eglGetError             FNPTR(eglGetError)
  #define eglInitialize           FNPTR(eglInitialize)
  #define eglMakeCurrent          FNPTR(eglMakeCurrent)
  #define eglSwapBuffers          FNPTR(eglSwapBuffers)
  #define eglTerminate            FNPTR(eglTerminate)
  
  #define glBlendFunc             FNPTR(glBlendFunc)
  #define glClear                 FNPTR(glClear)
  #define glClearColorx           FNPTR(glClearColorx)
  #define glColor4x               FNPTR(glColor4x)
  #define glColorPointer          FNPTR(glColorPointer)
  #define glDisable               FNPTR(glDisable)
  #define glDisableClientState    FNPTR(glDisableClientState)
  #define glDrawArrays            FNPTR(glDrawArrays)
  #define glEnable                FNPTR(glEnable)
  #define glEnableClientState     FNPTR(glEnableClientState)
  #define glFrustumx              FNPTR(glFrustumx)
  #define glGetError              FNPTR(glGetError)
  #define glLightxv               FNPTR(glLightxv)
  #define glLoadIdentity          FNPTR(glLoadIdentity)
  #define glMaterialx             FNPTR(glMaterialx)
  #define glMaterialxv            FNPTR(glMaterialxv)
  #define glMatrixMode            FNPTR(glMatrixMode)
  #define glMultMatrixx           FNPTR(glMultMatrixx)
  #define glNormalPointer         FNPTR(glNormalPointer)
  #define glPopMatrix             FNPTR(glPopMatrix)
  #define glPushMatrix            FNPTR(glPushMatrix)
  #define glRotatex               FNPTR(glRotatex)
  #define glScalex                FNPTR(glScalex)
  #define glShadeModel            FNPTR(glShadeModel)
  #define glTranslatex            FNPTR(glTranslatex)
  #define glVertexPointer         FNPTR(glVertexPointer)
  #define glViewport              FNPTR(glViewport)
  
  #endif // !IMPORTGL_NO_FNPTR_DEFS
  
  
  #endif // !DISABLE_IMPORTGL
  
  
  #ifdef __cplusplus
  }
  #endif
  
  
  #endif // !IMPORTGL_H_INCLUDED
  