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/opengles/redbook/hello.c

http://ftk.googlecode.com/
C | 119 lines | 54 code | 8 blank | 57 comment | 0 complexity | f3b4b763026371dadc72e0520a66fe2d MD5 | raw file
  1/*
  2 * License Applicability. Except to the extent portions of this file are
  3 * made subject to an alternative license as permitted in the SGI Free
  4 * Software License B, Version 1.1 (the "License"), the contents of this
  5 * file are subject only to the provisions of the License. You may not use
  6 * this file except in compliance with the License. You may obtain a copy
  7 * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  8 * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  9 * 
 10 * http://oss.sgi.com/projects/FreeB
 11 * 
 12 * Note that, as provided in the License, the Software is distributed on an
 13 * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
 14 * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
 15 * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
 16 * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
 17 * 
 18 * Original Code. The Original Code is: OpenGL Sample Implementation,
 19 * Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
 20 * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 21 * Copyright in any portions created by third parties is as indicated
 22 * elsewhere herein. All Rights Reserved.
 23 * 
 24 * Additional Notice Provisions: The application programming interfaces
 25 * established by SGI in conjunction with the Original Code are The
 26 * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
 27 * April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
 28 * 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
 29 * Window System(R) (Version 1.3), released October 19, 1998. This software
 30 * was created using the OpenGL(R) version 1.2.1 Sample Implementation
 31 * published by SGI, but has not been independently verified as being
 32 * compliant with the OpenGL(R) version 1.2.1 Specification.
 33 *
 34 */
 35
 36/*
 37 * hello.c
 38 * This is a simple, introductory OpenGL program.
 39 */
 40#include "ug.h"
 41
 42void display(UGWindow uwin)
 43{
 44/* clear all pixels  */
 45   glClear (GL_COLOR_BUFFER_BIT);
 46
 47/* draw white polygon (rectangle) with corners at
 48 * (0.25, 0.25, 0.0) and (0.75, 0.75, 0.0)  
 49 */
 50   glColor4f (1.0, 1.0, 1.0, 1.0);
 51   glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 52   glRotatef(10., 0.5, 0.5, 1.0);
 53//   glTranslatef(-0.25, -0.25, 0);
 54#if 0   
 55   glTranslatef(0.25, 0.25, 0);
 56   glScalef(0.5, 0.5, 1);
 57   glTranslatef(-0.5, -0.5, 0);
 58   glScalef(2, 2, 1);
 59//   glScalef(0.5, 0.5, 1);
 60   glColor4f (1.0, 1.0, 0, 1.0);
 61#endif   
 62   //glRotatef(10, 0, 0, 1.0);
 63   glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 64
 65/* don't wait!  
 66 * start processing buffered OpenGL routines 
 67 */
 68   glFlush ();
 69   ugSwapBuffers(uwin);
 70}
 71
 72void init (void) 
 73{
 74   const static GLfloat v[] = {
 75	0.25, 0.25, 0.0,
 76	0.75, 0.25, 0.0,
 77	0.25, 0.75, 0.0,
 78	0.75, 0.75, 0.0
 79    };
 80/* select clearing color 	*/
 81   glClearColor (0.0, 0.0, 0.0, 0.0);
 82
 83/* initialize viewing values  */
 84   glMatrixMode(GL_PROJECTION);
 85   glLoadIdentity();
 86   glOrthof(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 87   glVertexPointer(3, GL_FLOAT, 0, v);
 88   glEnableClientState(GL_VERTEX_ARRAY);
 89}
 90
 91/* 
 92 * Declare initial window size, position, and display mode
 93 * (single buffer and RGBA).  Open window with "hello"
 94 * in its title bar.  Call initialization routines.
 95 * Register callback function to display graphics.
 96 * Enter main loop and process events.
 97 */
 98#ifdef FTK_AS_PLUGIN
 99#include "ftk_app_demo.h"
100FTK_HIDE int FTK_MAIN(int argc, char* argv[]);
101FtkApp* ftk_app_demo_hellogles_create()
102{
103	return ftk_app_demo_create(_("helloGLES"), ftk_main);
104}
105#else
106#define FTK_HIDE extern
107#endif /*FTK_AS_PLUGIN*/
108
109FTK_HIDE int FTK_MAIN(int argc, char* argv[])
110{
111   UGCtx ug = ugInit();
112   UGWindow uwin = ugCreateWindow (ug, "", "hello", 250, 250, 100, 100);
113   init();
114   ugDisplayFunc(uwin, display); 
115#ifndef FTK_AS_PLUGIN
116   ugMainLoop(ug);
117#endif   
118   return 0;   /* ANSI C requires main to return int. */
119}