summaryrefslogtreecommitdiffstats
path: root/progs/tests/multipal.c
blob: 54483afa3b22f7af19f4814b0586b844658bb1e4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
/* $Id: multipal.c,v 1.3 2002/10/18 13:23:19 brianp Exp $ */

/*
 * Test multitexture and paletted textures.
 */

#include <assert.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <windows.h>
#endif
#define GL_GLEXT_LEGACY
#include <GL/glut.h>

#include "../util/readtex.c"   /* I know, this is a hack. */

#define TEXTURE_1_FILE "../images/tile.rgb"
#define TEXTURE_2_FILE "../images/reflect.rgb"

#define TEX0 1
#define TEX1 2
#define TEXBOTH 3
#define ANIMATE 10
#define QUIT 100

static GLboolean Animate = GL_TRUE;

static GLfloat Drift = 0.0;
static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0;



static void Idle( void )
{
   if (Animate) {
      Drift += 0.05;
      if (Drift >= 1.0)
         Drift = 0.0;

#ifdef GL_ARB_multitexture
      glActiveTextureARB(GL_TEXTURE0_ARB);
#endif
      glMatrixMode(GL_TEXTURE);
      glLoadIdentity();
      glTranslatef(Drift, 0.0, 0.0);
      glMatrixMode(GL_MODELVIEW);

#ifdef GL_ARB_multitexture
      glActiveTextureARB(GL_TEXTURE1_ARB);
#endif
      glMatrixMode(GL_TEXTURE);
      glLoadIdentity();
      glTranslatef(0.0, Drift, 0.0);
      glMatrixMode(GL_MODELVIEW);

      glutPostRedisplay();
   }
}


static void DrawObject(void)
{
   glBegin(GL_QUADS);

#ifdef GL_ARB_multitexture
   glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0.0, 0.0);
   glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 0.0);
   glVertex2f(-1.0, -1.0);

   glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 2.0, 0.0);
   glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, 0.0);
   glVertex2f(1.0, -1.0);

   glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 2.0, 2.0);
   glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, 1.0);
   glVertex2f(1.0, 1.0);

   glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0.0, 2.0);
   glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 1.0);
   glVertex2f(-1.0, 1.0);
#else
   glTexCoord2f(0.0, 0.0);
   glVertex2f(-1.0, -1.0);

   glTexCoord2f(1.0, 0.0);
   glVertex2f(1.0, -1.0);

   glTexCoord2f(1.0, 1.0);
   glVertex2f(1.0, 1.0);

   glTexCoord2f(0.0, 1.0);
   glVertex2f(-1.0, 1.0);
#endif

   glEnd();
}



static void Display( void )
{
   glClear( GL_COLOR_BUFFER_BIT );

   glPushMatrix();
      glRotatef(Xrot, 1.0, 0.0, 0.0);
      glRotatef(Yrot, 0.0, 1.0, 0.0);
      glRotatef(Zrot, 0.0, 0.0, 1.0);
      glScalef(5.0, 5.0, 5.0);
      DrawObject();
   glPopMatrix();

   glutSwapBuffers();
}


static void Reshape( int width, int height )
{
   glViewport( 0, 0, width, height );
   glMatrixMode( GL_PROJECTION );
   glLoadIdentity();
   glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 );
   /*glOrtho( -6.0, 6.0, -6.0, 6.0, 10.0, 100.0 );*/
   glMatrixMode( GL_MODELVIEW );
   glLoadIdentity();
   glTranslatef( 0.0, 0.0, -70.0 );
}


static void ModeMenu(int entry)
{
   GLboolean enable0 = GL_FALSE, enable1 = GL_FALSE;
   if (entry==TEX0) {
      enable0 = GL_TRUE;
   }
   else if (entry==TEX1) {
      enable1 = GL_TRUE;
   }
   else if (entry==TEXBOTH) {
      enable0 = GL_TRUE;
      enable1 = GL_TRUE;
   }
   else if (entry==ANIMATE) {
      Animate = !Animate;
   }
   else if (entry==QUIT) {
      exit(0);
   }

   if (entry != ANIMATE) {
#ifdef GL_ARB_multitexture
      glActiveTextureARB(GL_TEXTURE0_ARB);
#endif
      if (enable0) {
         glEnable(GL_TEXTURE_2D);
      }
      else
         glDisable(GL_TEXTURE_2D);

#ifdef GL_ARB_multitexture
      glActiveTextureARB(GL_TEXTURE1_ARB);
#endif
      if (enable1) {
         glEnable(GL_TEXTURE_2D);
      }
      else
         glDisable(GL_TEXTURE_2D);
   }

   glutPostRedisplay();
}


static void Key( unsigned char key, int x, int y )
{
   (void) x;
   (void) y;
   switch (key) {
      case 27:
         exit(0);
         break;
   }
   glutPostRedisplay();
}


static void SpecialKey( int key, int x, int y )
{
   float step = 3.0;
   (void) x;
   (void) y;

   switch (key) {
      case GLUT_KEY_UP:
         Xrot += step;
         break;
      case GLUT_KEY_DOWN:
         Xrot -= step;
         break;
      case GLUT_KEY_LEFT:
         Yrot += step;
         break;
      case GLUT_KEY_RIGHT:
         Yrot -= step;
         break;
   }
   glutPostRedisplay();
}


static void load_tex(const char *fname, int channel)
{
   GLubyte *image;
   GLenum format, type;
   GLint w, h;
   GLubyte *grayImage;
   int i;
   GLubyte table[256][4];

   image = LoadRGBImage(fname, &w, &h, &format);
   if (!image)
      exit(1);

   printf("%s %d x %d\n", fname, w, h);
   grayImage = malloc(w * h * 1);
   assert(grayImage);
   for (i = 0; i < w * h; i++) {
      int g = (image[i*3+0] + image[i*3+1] + image[i*3+2]) / 3;
      assert(g < 256);
      grayImage[i] = g;
   }

   glTexImage2D(GL_TEXTURE_2D, 0, GL_COLOR_INDEX, w, h, 0, GL_COLOR_INDEX,
                GL_UNSIGNED_BYTE, grayImage);

   for (i = 0; i < 256; i++) {
      table[i][0] = channel ? i : 0;
      table[i][1] = i;
      table[i][2] = channel ? 0 : i;
      table[i][3] = 255;
   }

   glColorTableEXT(GL_TEXTURE_2D,    /* target */
                   GL_RGBA,          /* internal format */
                   256,              /* table size */
                   GL_RGBA,          /* table format */
                   GL_UNSIGNED_BYTE, /* table type */
                   table);           /* the color table */

   free(grayImage);
   free(image);
}



static void Init( int argc, char *argv[] )
{
   GLuint texObj[2];
   GLint units;

   if (!glutExtensionSupported("GL_ARB_multitexture")) {
      printf("Sorry, GL_ARB_multitexture not supported by this renderer.\n");
      exit(1);
   }
   if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
      printf("Sorry, GL_EXT_paletted_texture not supported by this renderer.\n");
      exit(1);
   }

   glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &units);
   printf("%d texture units supported\n", units);

   /* allocate two texture objects */
   glGenTextures(2, texObj);

   /* setup texture obj 0 */
   glBindTexture(GL_TEXTURE_2D, texObj[0]);
#ifdef LINEAR_FILTER
   /* linear filtering looks much nicer but is much slower for Mesa */
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
foo
#else
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
#endif

   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

   load_tex(TEXTURE_1_FILE, 0);
#if 0
   if (!LoadRGBMipmaps(TEXTURE_1_FILE, GL_RGB)) {
      printf("Error: couldn't load texture image\n");
      exit(1);
   }
#endif

   /* setup texture obj 1 */
   glBindTexture(GL_TEXTURE_2D, texObj[1]);
#ifdef LINEAR_FILTER
   /* linear filtering looks much nicer but is much slower for Mesa */
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
foo
#else
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
#endif

   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

   load_tex(TEXTURE_2_FILE, 1);
#if 0
   if (!LoadRGBMipmaps(TEXTURE_2_FILE, GL_RGB)) {
      printf("Error: couldn't load texture image\n");
      exit(1);
   }
#endif

   /* now bind the texture objects to the respective texture units */
#ifdef GL_ARB_multitexture
   glActiveTextureARB(GL_TEXTURE0_ARB);
   glBindTexture(GL_TEXTURE_2D, texObj[0]);
   glActiveTextureARB(GL_TEXTURE1_ARB);
   glBindTexture(GL_TEXTURE_2D, texObj[1]);
#endif

   glShadeModel(GL_FLAT);
   glClearColor(0.3, 0.3, 0.4, 1.0);

   ModeMenu(TEXBOTH);

   if (argc > 1 && strcmp(argv[1], "-info")==0) {
      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
   }
}


int main( int argc, char *argv[] )
{
   glutInit( &argc, argv );
   glutInitWindowSize( 300, 300 );
   glutInitWindowPosition( 0, 0 );
   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
   glutCreateWindow(argv[0] );

   Init( argc, argv );

   glutReshapeFunc( Reshape );
   glutKeyboardFunc( Key );
   glutSpecialFunc( SpecialKey );
   glutDisplayFunc( Display );
   glutIdleFunc( Idle );

   glutCreateMenu(ModeMenu);
   glutAddMenuEntry("Texture 0", TEX0);
   glutAddMenuEntry("Texture 1", TEX1);
   glutAddMenuEntry("Multi-texture", TEXBOTH);
   glutAddMenuEntry("Toggle Animation", ANIMATE);
   glutAddMenuEntry("Quit", QUIT);
   glutAttachMenu(GLUT_RIGHT_BUTTON);

   glutMainLoop();
   return 0;
}