progs/windml/uglaccum.c

   1
   2 /* Copyright (c) Mark J. Kilgard, 1994. */
   3
   4 /*
   5  * (c) Copyright 1993, Silicon Graphics, Inc.
   6  * ALL RIGHTS RESERVED
   7  * Permission to use, copy, modify, and distribute this software for
   8  * any purpose and without fee is hereby granted, provided that the above
   9  * copyright notice appear in all copies and that both the copyright notice
  10  * and this permission notice appear in supporting documentation, and that
  11  * the name of Silicon Graphics, Inc. not be used in advertising
  12  * or publicity pertaining to distribution of the software without specific,
  13  * written prior permission.
  14  *
  15  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
  16  * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
  18  * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
  19  * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
  20  * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
  21  * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
  22  * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
  23  * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
  24  * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
  25  * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
  26  * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
  27  *
  28  * US Government Users Restricted Rights
  29  * Use, duplication, or disclosure by the Government is subject to
  30  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  31  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
  32  * clause at DFARS 252.227-7013 and/or in similar or successor
  33  * clauses in the FAR or the DOD or NASA FAR Supplement.
  34  * Unpublished-- rights reserved under the copyright laws of the
  35  * United States.  Contractor/manufacturer is Silicon Graphics,
  36  * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
  37  *
  38  * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
  39  */
  40
  41 /*  Original name: accanti.c
  42  *
  43  *  Conversion to UGL/Mesa by Stephane Raimbault
  44  */
  45
  46 #include <stdio.h>
  47 #include <math.h>
  48
  49 #include <ugl/ugl.h>
  50 #include <ugl/uglevent.h>
  51 #include <ugl/uglinput.h>
  52
  53 #include <GL/uglmesa.h>
  54 #include <GL/uglglutshapes.h>
  55
  56 #include "../book/jitter.h"
  57
  58 UGL_LOCAL UGL_EVENT_SERVICE_ID eventServiceId;
  59 UGL_LOCAL UGL_EVENT_Q_ID qId;
  60 UGL_LOCAL UGL_MESA_CONTEXT umc;
  61
  62 /*  Initialize lighting and other values.
  63  */
  64 UGL_LOCAL void initGL(GLsizei w, GLsizei h)
  65     {
  66     GLfloat mat_ambient[] = { 1.0, 1.0, 1.0, 1.0 };
  67     GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
  68     GLfloat light_position[] = { 0.0, 0.0, 10.0, 1.0 };
  69     GLfloat lm_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
  70
  71     glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
  72     glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
  73     glMaterialf(GL_FRONT, GL_SHININESS, 50.0);
  74     glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  75     glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lm_ambient);
  76
  77     glEnable(GL_LIGHTING);
  78     glEnable(GL_LIGHT0);
  79     glDepthFunc(GL_LESS);
  80     glEnable(GL_DEPTH_TEST);
  81     glShadeModel (GL_FLAT);
  82
  83     glClearColor(0.0, 0.0, 0.0, 0.0);
  84     glClearAccum(0.0, 0.0, 0.0, 0.0);
  85
  86     glMatrixMode(GL_PROJECTION);
  87     glLoadIdentity();
  88     if (w <= h)
  89             glOrtho (-2.25, 2.25, -2.25*h/w, 2.25*h/w, -10.0, 10.0);
  90     else
  91             glOrtho (-2.25*w/h, 2.25*w/h, -2.25, 2.25, -10.0, 10.0);
  92     glMatrixMode(GL_MODELVIEW);
  93     }
  94
  95 UGL_LOCAL void displayObjects(void)
  96     {
  97     GLfloat torus_diffuse[] = { 0.7, 0.7, 0.0, 1.0 };
  98     GLfloat cube_diffuse[] = { 0.0, 0.7, 0.7, 1.0 };
  99     GLfloat sphere_diffuse[] = { 0.7, 0.0, 0.7, 1.0 };
 100     GLfloat octa_diffuse[] = { 0.7, 0.4, 0.4, 1.0 };
 101
 102     glPushMatrix ();
 103     glRotatef (30.0, 1.0, 0.0, 0.0);
 104
 105     glPushMatrix ();
 106     glTranslatef (-0.80, 0.35, 0.0);
 107     glRotatef (100.0, 1.0, 0.0, 0.0);
 108     glMaterialfv(GL_FRONT, GL_DIFFUSE, torus_diffuse);
 109     glutSolidTorus (0.275, 0.85, 16, 16);
 110     glPopMatrix ();
 111
 112     glPushMatrix ();
 113     glTranslatef (-0.75, -0.50, 0.0);
 114     glRotatef (45.0, 0.0, 0.0, 1.0);
 115     glRotatef (45.0, 1.0, 0.0, 0.0);
 116     glMaterialfv(GL_FRONT, GL_DIFFUSE, cube_diffuse);
 117     glutSolidCube (1.5);
 118     glPopMatrix ();
 119
 120     glPushMatrix ();
 121     glTranslatef (0.75, 0.60, 0.0);
 122     glRotatef (30.0, 1.0, 0.0, 0.0);
 123     glMaterialfv(GL_FRONT, GL_DIFFUSE, sphere_diffuse);
 124     glutSolidSphere (1.0, 16, 16);
 125     glPopMatrix ();
 126
 127     glPushMatrix ();
 128     glTranslatef (0.70, -0.90, 0.25);
 129     glMaterialfv(GL_FRONT, GL_DIFFUSE, octa_diffuse);
 130     glutSolidOctahedron ();
 131     glPopMatrix ();
 132
 133     glPopMatrix ();
 134     }
 135
 136 #define ACSIZE  8
 137
 138 UGL_LOCAL void drawGL(void)
 139     {
 140     GLint viewport[4];
 141     int jitter;
 142
 143     glGetIntegerv (GL_VIEWPORT, viewport);
 144
 145     glClear(GL_ACCUM_BUFFER_BIT);
 146     for (jitter = 0; jitter < ACSIZE; jitter++)
 147         {
 148         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 149         glPushMatrix ();
 150 /*      Note that 4.5 is the distance in world space between
 151  *      left and right and bottom and top.
 152  *      This formula converts fractional pixel movement to
 153  *      world coordinates.
 154  */
 155         glTranslatef (j8[jitter].x*4.5/viewport[2],
 156                       j8[jitter].y*4.5/viewport[3], 0.0);
 157         displayObjects ();
 158         glPopMatrix ();
 159         glAccum(GL_ACCUM, 1.0/ACSIZE);
 160         }
 161     glAccum (GL_RETURN, 1.0);
 162     glFlush();
 163
 164     uglMesaSwapBuffers();
 165     }
 166
 167 UGL_LOCAL int getEvent(void)
 168     {
 169     UGL_EVENT event;
 170     UGL_STATUS status;
 171     int retVal = 0;
 172
 173     status = uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT);
 174
 175     while (status != UGL_STATUS_Q_EMPTY)
 176         {
 177         UGL_INPUT_EVENT * pInputEvent = (UGL_INPUT_EVENT *)&event;
 178
 179         if (pInputEvent->modifiers & UGL_KEYBOARD_KEYDOWN)
 180             retVal = 1;
 181
 182         status = uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT);
 183         }
 184
 185     return(retVal);
 186     }
 187
 188 void windMLAccum (UGL_BOOL windMLMode);
 189
 190 void uglaccum (void)
 191     {
 192     taskSpawn("tAccum", 210, VX_FP_TASK, 100000,
 193               (FUNCPTR)windMLAccum,UGL_FALSE,1,2,3,4,5,6,7,8,9);
 194     }
 195
 196 void windMLAccum (UGL_BOOL windMLMode)
 197     {
 198     UGL_INPUT_DEVICE_ID keyboardDevId;
 199     GLsizei width, height;
 200
 201     uglInitialize();
 202
 203     uglDriverFind (UGL_KEYBOARD_TYPE, 0, (UGL_UINT32 *)&keyboardDevId);
 204
 205     uglDriverFind (UGL_EVENT_SERVICE_TYPE, 0, (UGL_UINT32 *)&eventServiceId);
 206
 207     qId = uglEventQCreate (eventServiceId, 100);
 208
 209     if (windMLMode)
 210         umc = uglMesaCreateNewContextExt(UGL_MESA_DOUBLE
 211                                          | UGL_MESA_WINDML_EXCLUSIVE,
 212                                          16,
 213                                          0,
 214                                          8,8,8,0,
 215                                          NULL);
 216     else
 217         umc = uglMesaCreateNewContextExt(UGL_MESA_DOUBLE,
 218                                          16,
 219                                          0,
 220                                          8,8,8,0,
 221                                          NULL);
 222
 223     if (umc == NULL)
 224         {
 225         uglDeinitialize();
 226         return;
 227         }
 228
 229     /* Fullscreen */
 230
 231     uglMesaMakeCurrentContext(umc, 0, 0,
 232                               UGL_MESA_FULLSCREEN_WIDTH,
 233                               UGL_MESA_FULLSCREEN_HEIGHT);
 234
 235     uglMesaGetIntegerv(UGL_MESA_WIDTH, &width);
 236     uglMesaGetIntegerv(UGL_MESA_HEIGHT, &height);
 237
 238     initGL(width, height);
 239
 240     drawGL();
 241
 242     while (!getEvent());
 243
 244     uglEventQDestroy (eventServiceId, qId);
 245
 246     uglMesaDestroyContext();
 247     uglDeinitialize();
 248
 249     return;
 250     }