progs/windml/ugltexcube.c

   1
   2 /* ugltexcube.c - WindML/Mesa example program */
   3
   4 /* Copyright (C) 2001 by Wind River Systems, Inc */
   5
   6 /*
   7  * Mesa 3-D graphics library
   8  * Version:  3.5
   9  *
  10  * The MIT License
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included
  19  * in all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  22  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  24  * THE AUTHORS OR COPYRIGHT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  26  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  27  * DEALINGS IN THE SOFTWARE.
  28  */
  29
  30 /*
  31  * Authors:
  32  * Stephane Raimbault <stephane.raimbault@windriver.com>
  33  */
  34
  35 /*
  36 DESCRIPTION
  37 Draw a textured cube
  38 */
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <math.h>
  43
  44 #include <ugl/ugl.h>
  45 #include <ugl/uglevent.h>
  46 #include <ugl/uglinput.h>
  47 #include <GL/uglmesa.h>
  48 #include <GL/glu.h>
  49
  50 #include "../util/readtex.h"
  51
  52 #define IMAGE_FILE "Mesa/images/wrs_logo.rgb"
  53
  54 UGL_LOCAL UGL_EVENT_SERVICE_ID eventServiceId;
  55 UGL_LOCAL UGL_EVENT_Q_ID qId;
  56 UGL_LOCAL UGL_MESA_CONTEXT umc;
  57
  58 UGL_LOCAL GLfloat xrot, yrot, zrot;
  59 UGL_LOCAL GLuint texture[1];
  60 UGL_LOCAL GLuint theTexCube;
  61
  62 typedef struct {
  63    GLubyte *data;
  64    int width, height;
  65    GLenum format;
  66    } TEX_IMAGE;
  67
  68 UGL_LOCAL void cleanUp (void);
  69
  70 UGL_LOCAL void loadGLTexture()
  71     {
  72     TEX_IMAGE * texImage=NULL;
  73
  74     texImage = (TEX_IMAGE *) malloc(sizeof(TEX_IMAGE));
  75
  76     if (texImage == NULL)
  77         {
  78         printf("Error allocating space for image");
  79         cleanUp();
  80         exit(1);
  81         }
  82
  83     texImage->data = LoadRGBImage(IMAGE_FILE, &texImage->width,
  84                                   &texImage->height, &texImage->format);
  85     if (!texImage->data)
  86         {
  87         printf("Couldn't read %s\n", IMAGE_FILE);
  88         free(texImage);
  89         cleanUp();
  90         exit(1);
  91         }
  92
  93     /* Create Texture */
  94     glGenTextures(1, &texture[0]);
  95     glBindTexture(GL_TEXTURE_2D, texture[0]);
  96     glTexImage2D(GL_TEXTURE_2D, 0, 3,
  97                  texImage->width, texImage->height,
  98                  0, GL_RGB, GL_UNSIGNED_BYTE, texImage->data);
  99
 100     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 101     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 102
 103     free(texImage->data);
 104     free(texImage);
 105     }
 106
 107 UGL_LOCAL void initGL(int width, int height)
 108     {
 109
 110     /* Load the texture(s) */
 111     loadGLTexture();
 112
 113     /* Enable texture mapping */
 114     glEnable(GL_TEXTURE_2D);
 115
 116     /* Clear the background color to black */
 117     glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 118
 119     glEnable(GL_CULL_FACE);
 120
 121     /* Enables smooth color shading */
 122     glShadeModel(GL_SMOOTH);
 123
 124 /* glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); */
 125 /* glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); */
 126
 127     theTexCube = glGenLists(1);
 128     glNewList(theTexCube, GL_COMPILE);
 129
 130     /* Choose the texture to use */
 131     glBindTexture(GL_TEXTURE_2D, texture[0]);
 132
 133     /* Begin drawing a cube */
 134     glBegin(GL_QUADS);
 135
 136     /* Front face (note that the texture's corners have to match the
 137        quad's corners) */
 138
 139     /* Bottom left of the texture and quad */
 140     glTexCoord2f(0.0f, 0.0f);
 141     glVertex3f(-1.0f, -1.0f, 1.0f);
 142
 143     /* Bottom Right Of The Texture and Quad */
 144     glTexCoord2f(1.0f, 0.0f);
 145     glVertex3f(1.0f, -1.0f, 1.0f);
 146
 147     /* Top Right Of The Texture and Quad */
 148     glTexCoord2f(1.0f, 1.0f);
 149     glVertex3f(1.0f, 1.0f, 1.0f);
 150     /* Top Left Of The Texture and Quad */
 151     glTexCoord2f(0.0f, 1.0f);
 152     glVertex3f(-1.0f, 1.0f, 1.0f);
 153
 154     /* Back Face */
 155
 156     /* Bottom Right Of The Texture and Quad */
 157     glTexCoord2f(1.0f, 0.0f);
 158     glVertex3f(-1.0f, -1.0f, -1.0f);
 159
 160     /* Top Right Of The Texture and Quad */
 161     glTexCoord2f(1.0f, 1.0f);
 162     glVertex3f(-1.0f, 1.0f, -1.0f);
 163
 164     /* Top Left Of The Texture and Quad */
 165     glTexCoord2f(0.0f, 1.0f);
 166     glVertex3f(1.0f, 1.0f, -1.0f);
 167
 168     /* Bottom Left Of The Texture and Quad */
 169     glTexCoord2f(0.0f, 0.0f);
 170     glVertex3f(1.0f, -1.0f, -1.0f);
 171
 172
 173     /* Top Face */
 174
 175     /* Top Left Of The Texture and Quad */
 176     glTexCoord2f(0.0f, 1.0f);
 177     glVertex3f(-1.0f, 1.0f, -1.0f);
 178
 179     /* Bottom Left Of The Texture and Quad */
 180     glTexCoord2f(0.0f, 0.0f);
 181     glVertex3f(-1.0f, 1.0f, 1.0f);
 182
 183     /* Bottom Right Of The Texture and Quad */
 184     glTexCoord2f(1.0f, 0.0f);
 185     glVertex3f(1.0f, 1.0f, 1.0f);
 186
 187     /* Top Right Of The Texture and Quad */
 188     glTexCoord2f(1.0f, 1.0f);
 189     glVertex3f(1.0f, 1.0f, -1.0f);
 190
 191     /* Bottom Face */
 192
 193     /* Top Right Of The Texture and Quad */
 194     glTexCoord2f(1.0f, 1.0f);
 195     glVertex3f(-1.0f, -1.0f, -1.0f);
 196
 197     /* Top Left Of The Texture and Quad */
 198     glTexCoord2f(0.0f, 1.0f);
 199     glVertex3f(1.0f, -1.0f, -1.0f);
 200
 201     /* Bottom Left Of The Texture and Quad */
 202     glTexCoord2f(0.0f, 0.0f);
 203     glVertex3f(1.0f, -1.0f, 1.0f);
 204
 205     /* Bottom Right Of The Texture and Quad */
 206     glTexCoord2f(1.0f, 0.0f);
 207     glVertex3f(-1.0f, -1.0f, 1.0f);
 208
 209
 210     /* Right face */
 211     /* Bottom Right Of The Texture and Quad */
 212     glTexCoord2f(1.0f, 0.0f);
 213     glVertex3f(1.0f, -1.0f, -1.0f);
 214
 215     /* Top Right Of The Texture and Quad */
 216     glTexCoord2f(1.0f, 1.0f);
 217     glVertex3f(1.0f, 1.0f, -1.0f);
 218
 219     /* Top Left Of The Texture and Quad */
 220     glTexCoord2f(0.0f, 1.0f);
 221     glVertex3f(1.0f, 1.0f, 1.0f);
 222
 223     /* Bottom Left Of The Texture and Quad */
 224     glTexCoord2f(0.0f, 0.0f);
 225     glVertex3f(1.0f, -1.0f, 1.0f);
 226
 227
 228     /* Left Face */
 229     /* Bottom Left Of The Texture and Quad */
 230     glTexCoord2f(0.0f, 0.0f);
 231     glVertex3f(-1.0f, -1.0f, -1.0f);
 232
 233     /* Bottom Right Of The Texture and Quad */
 234     glTexCoord2f(1.0f, 0.0f);
 235     glVertex3f(-1.0f, -1.0f, 1.0f);
 236
 237     /* Top Right Of The Texture and Quad */
 238     glTexCoord2f(1.0f, 1.0f);
 239     glVertex3f(-1.0f, 1.0f, 1.0f);
 240
 241     /* Top Left Of The Texture and Quad */
 242     glTexCoord2f(0.0f, 1.0f);
 243     glVertex3f(-1.0f, 1.0f, -1.0f);
 244
 245     glEnd();            /* done with the polygon */
 246     glEndList();
 247
 248     glDisable(GL_DITHER);
 249     glMatrixMode(GL_PROJECTION);
 250     /* Reset the projection matrix */
 251     glLoadIdentity();
 252     /* Calculate the aspect ratio of the window */
 253     gluPerspective(45.0f, (GLfloat) width / (GLfloat) height, 0.1f, 100.0f);
 254
 255     glMatrixMode(GL_MODELVIEW);
 256     glLoadIdentity();
 257     }
 258
 259 UGL_LOCAL void drawGL()
 260     {
 261     glClear(GL_COLOR_BUFFER_BIT);
 262
 263     /* Reset The View */
 264     glPushMatrix();
 265
 266     /* Move 8 units into the screen */
 267     glTranslatef(0.0f, 0.0f, -8.0f);
 268
 269     /* Rotate on the X axis */
 270     glRotatef(xrot, 1.0f, 0.0f, 0.0f);
 271
 272     /* Rotate on the Y axis */
 273     glRotatef(yrot, 0.0f, 1.0f, 0.0f);
 274
 275     /* Rotate On The Z Axis */
 276     glRotatef(zrot, 0.0f, 0.0f, 1.0f);
 277
 278     glCallList(theTexCube);
 279
 280     glFlush();
 281
 282     uglMesaSwapBuffers();
 283
 284     glPopMatrix();
 285
 286     xrot += 1.6f;
 287     yrot += 1.6f;
 288     zrot += 1.6f;
 289 }
 290
 291 UGL_LOCAL int getEvent(void)
 292     {
 293     UGL_EVENT event;
 294     UGL_STATUS status;
 295     int retVal = 0;
 296
 297     status = uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT);
 298
 299     while (status != UGL_STATUS_Q_EMPTY)
 300         {
 301         UGL_INPUT_EVENT * pInputEvent = (UGL_INPUT_EVENT *)&event;
 302
 303         if (pInputEvent->modifiers & UGL_KEYBOARD_KEYDOWN)
 304             retVal = 1;
 305
 306         status = uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT);
 307         }
 308
 309     return(retVal);
 310     }
 311
 312 UGL_LOCAL void cleanUp (void)
 313     {
 314     if (eventServiceId != UGL_NULL)
 315         uglEventQDestroy (eventServiceId, qId);
 316
 317     uglMesaDestroyContext();
 318     uglDeinitialize();
 319     }
 320
 321 void windMLTexCube (UGL_BOOL windMLMode);
 322
 323 void ugltexcube (void)
 324     {
 325     taskSpawn("tTexCube", 210, VX_FP_TASK, 100000, (FUNCPTR)windMLTexCube,
 326               UGL_FALSE,1,2,3,4,5,6,7,8,9);
 327     }
 328
 329
 330 void windMLTexCube(UGL_BOOL windMLMode)
 331     {
 332     GLuint width, height;
 333     UGL_INPUT_DEVICE_ID keyboardDevId;
 334
 335     uglInitialize();
 336
 337     uglDriverFind (UGL_KEYBOARD_TYPE, 0, (UGL_UINT32 *)&keyboardDevId);
 338
 339     if (uglDriverFind (UGL_EVENT_SERVICE_TYPE, 0,
 340                        (UGL_UINT32 *)&eventServiceId) == UGL_STATUS_OK)
 341         {
 342         qId = uglEventQCreate (eventServiceId, 100);
 343         }
 344     else
 345         {
 346         eventServiceId = UGL_NULL;
 347         }
 348
 349     if (windMLMode)
 350        umc = uglMesaCreateNewContext(UGL_MESA_DOUBLE
 351                                      | UGL_MESA_WINDML_EXCLUSIVE, NULL);
 352     else
 353        umc = uglMesaCreateNewContext(UGL_MESA_DOUBLE, NULL);
 354
 355     if (umc == NULL)
 356         {
 357         uglDeinitialize();
 358         return;
 359         }
 360
 361     uglMesaMakeCurrentContext(umc, 0, 0,
 362                               UGL_MESA_FULLSCREEN_WIDTH,
 363                               UGL_MESA_FULLSCREEN_HEIGHT);
 364
 365
 366     uglMesaGetIntegerv(UGL_MESA_WIDTH, &width);
 367     uglMesaGetIntegerv(UGL_MESA_HEIGHT, &height);
 368
 369     initGL(width, height);
 370
 371     while(!getEvent())
 372         drawGL();
 373
 374     cleanUp();
 375
 376     return;
 377     }
 378
 379