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progs/tests: also test stencil INCR_WRAP mode if supported
[mesa.git] / progs / tests / bufferobj.c
1 /*
2 * Test GL_ARB_vertex_buffer_object
3 * Also test GL_ARB_vertex_array_object if supported
4 *
5 * Brian Paul
6 * 16 Sep 2003
7 */
8
9
10 #include <assert.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <math.h>
15 #include <GL/glew.h>
16 #include <GL/glut.h>
17
18 #define NUM_OBJECTS 10
19
20 struct object
21 {
22 GLuint ArrayObjectID; /** GL_ARB_vertex_array_object */
23 GLuint VertexBufferID;
24 GLuint ColorBufferID;
25 GLuint ElementsBufferID;
26 GLuint NumVerts;
27 GLuint VertexOffset;
28 GLuint ColorOffset;
29 GLuint VertexStride;
30 GLuint ColorStride;
31 GLuint NumElements;
32 GLuint MaxElement;
33 };
34
35 static struct object Objects[NUM_OBJECTS];
36 static GLuint NumObjects;
37
38 static GLuint Win;
39
40 static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
41 static GLboolean Anim = GL_TRUE;
42 static GLboolean Have_ARB_vertex_array_object = GL_FALSE;
43
44
45 static void CheckError(int line)
46 {
47 GLenum err = glGetError();
48 if (err) {
49 printf("GL Error 0x%x at line %d\n", (int) err, line);
50 }
51 }
52
53
54 static void DrawObject( const struct object *obj )
55 {
56 if (Have_ARB_vertex_array_object && obj->ArrayObjectID) {
57 glBindVertexArray(obj->ArrayObjectID);
58
59 if (obj->NumElements > 0) {
60 /* indexed arrays */
61 glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, obj->ElementsBufferID);
62 glDrawRangeElements(GL_LINE_LOOP, 0, obj->MaxElement,
63 obj->NumElements, GL_UNSIGNED_INT, NULL);
64 }
65 else {
66 /* non-indexed arrays */
67 glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
68 glDrawArrays(GL_LINE_LOOP, 0, obj->NumVerts);
69 }
70
71 glBindVertexArray(0);
72 }
73 else {
74 /* no vertex array objects, must set vertex/color pointers per draw */
75
76 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->VertexBufferID);
77 glVertexPointer(3, GL_FLOAT, obj->VertexStride, (void *) obj->VertexOffset);
78 glEnableClientState(GL_VERTEX_ARRAY);
79
80 /* test push/pop attrib */
81 /* XXX this leads to a segfault with NVIDIA's 53.36 driver */
82 #if 0
83 if (1)
84 {
85 glPushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
86 /*glVertexPointer(3, GL_FLOAT, 0, (void *) (obj->VertexOffset + 10000));*/
87 glBindBufferARB(GL_ARRAY_BUFFER_ARB, 999999);
88 glPopClientAttrib();
89 }
90 #endif
91 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->ColorBufferID);
92 glColorPointer(3, GL_FLOAT, obj->ColorStride, (void *) obj->ColorOffset);
93 glEnableClientState(GL_COLOR_ARRAY);
94
95 if (obj->NumElements > 0) {
96 /* indexed arrays */
97 glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, obj->ElementsBufferID);
98 glDrawElements(GL_LINE_LOOP, obj->NumElements, GL_UNSIGNED_INT, NULL);
99 }
100 else {
101 /* non-indexed arrays */
102 glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
103 glDrawArrays(GL_LINE_LOOP, 0, obj->NumVerts);
104 }
105 }
106 }
107
108
109 static void Idle( void )
110 {
111 Zrot = 0.05 * glutGet(GLUT_ELAPSED_TIME);
112 glutPostRedisplay();
113 }
114
115
116 static void Display( void )
117 {
118 int i;
119
120 glClear( GL_COLOR_BUFFER_BIT );
121
122 for (i = 0; i < NumObjects; i++) {
123 float x = 7.0 * ((float) i / (NumObjects-1) - 0.5);
124 glPushMatrix();
125 glTranslatef(x, 0, 0);
126 glRotatef(Xrot, 1, 0, 0);
127 glRotatef(Yrot, 0, 1, 0);
128 glRotatef(Zrot, 0, 0, 1);
129
130 DrawObject(Objects + i);
131
132 glPopMatrix();
133 }
134
135 CheckError(__LINE__);
136 glutSwapBuffers();
137 }
138
139
140 static void Reshape( int width, int height )
141 {
142 float ar = (float) width / (float) height;
143 glViewport( 0, 0, width, height );
144 glMatrixMode( GL_PROJECTION );
145 glLoadIdentity();
146 glFrustum( -ar, ar, -1.0, 1.0, 5.0, 25.0 );
147 glMatrixMode( GL_MODELVIEW );
148 glLoadIdentity();
149 glTranslatef( 0.0, 0.0, -15.0 );
150 }
151
152
153 static void FreeBuffers(void)
154 {
155 int i;
156 for (i = 0; i < NUM_OBJECTS; i++) {
157 glDeleteBuffersARB(1, &Objects[i].VertexBufferID);
158 glDeleteBuffersARB(1, &Objects[i].ColorBufferID);
159 glDeleteBuffersARB(1, &Objects[i].ElementsBufferID);
160 }
161 }
162
163
164 static void Key( unsigned char key, int x, int y )
165 {
166 const GLfloat step = 3.0;
167 (void) x;
168 (void) y;
169 switch (key) {
170 case 'a':
171 Anim = !Anim;
172 if (Anim)
173 glutIdleFunc(Idle);
174 else
175 glutIdleFunc(NULL);
176 break;
177 case 'z':
178 Zrot -= step;
179 break;
180 case 'Z':
181 Zrot += step;
182 break;
183 case 27:
184 FreeBuffers();
185 glutDestroyWindow(Win);
186 exit(0);
187 break;
188 }
189 glutPostRedisplay();
190 }
191
192
193 static void SpecialKey( int key, int x, int y )
194 {
195 const GLfloat step = 3.0;
196 (void) x;
197 (void) y;
198 switch (key) {
199 case GLUT_KEY_UP:
200 Xrot -= step;
201 break;
202 case GLUT_KEY_DOWN:
203 Xrot += step;
204 break;
205 case GLUT_KEY_LEFT:
206 Yrot -= step;
207 break;
208 case GLUT_KEY_RIGHT:
209 Yrot += step;
210 break;
211 }
212 glutPostRedisplay();
213 }
214
215
216 /**
217 * If GL_ARB_vertex_array_object is supported, create an array object
218 * and set all the per-array state.
219 */
220 static void
221 CreateVertexArrayObject(struct object *obj)
222 {
223 glGenVertexArrays(1, &obj->ArrayObjectID);
224 glBindVertexArray(obj->ArrayObjectID);
225
226 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->VertexBufferID);
227 glVertexPointer(3, GL_FLOAT, obj->VertexStride, (void *) obj->VertexOffset);
228 glEnableClientState(GL_VERTEX_ARRAY);
229
230 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->ColorBufferID);
231 glColorPointer(3, GL_FLOAT, obj->ColorStride, (void *) obj->ColorOffset);
232 glEnableClientState(GL_COLOR_ARRAY);
233
234 glBindVertexArray(0);
235 }
236
237
238 /*
239 * Non-interleaved position/color data.
240 */
241 static void MakeObject1(struct object *obj)
242 {
243 GLfloat *v, *c;
244 void *p;
245 int i;
246 GLubyte buffer[500];
247
248 for (i = 0; i < 500; i++)
249 buffer[i] = i & 0xff;
250
251 obj->VertexBufferID = 0;
252 glGenBuffersARB(1, &obj->VertexBufferID);
253 obj->ColorBufferID = obj->VertexBufferID;
254 assert(obj->VertexBufferID != 0);
255 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->VertexBufferID);
256 glBufferDataARB(GL_ARRAY_BUFFER_ARB, 500, buffer, GL_STATIC_DRAW_ARB);
257
258 for (i = 0; i < 500; i++)
259 buffer[i] = 0;
260
261 glGetBufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, 500, buffer);
262
263 for (i = 0; i < 500; i++)
264 assert(buffer[i] == (i & 0xff));
265
266 glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAPPED_ARB, &i);
267 assert(!i);
268
269 glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_USAGE_ARB, &i);
270
271 v = (GLfloat *) glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
272
273 /* do some sanity tests */
274 glGetBufferPointervARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAP_POINTER_ARB, &p);
275 assert(p == v);
276
277 glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_SIZE_ARB, &i);
278 assert(i == 500);
279
280 glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_USAGE_ARB, &i);
281 assert(i == GL_STATIC_DRAW_ARB);
282
283 glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_ACCESS_ARB, &i);
284 assert(i == GL_WRITE_ONLY_ARB);
285
286 glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAPPED_ARB, &i);
287 assert(i);
288
289 /* Make rectangle */
290 v[0] = -1; v[1] = -1; v[2] = 0;
291 v[3] = 1; v[4] = -1; v[5] = 0;
292 v[6] = 1; v[7] = 1; v[8] = 0;
293 v[9] = -1; v[10] = 1; v[11] = 0;
294 c = v + 12;
295 c[0] = 1; c[1] = 0; c[2] = 0;
296 c[3] = 1; c[4] = 0; c[5] = 0;
297 c[6] = 1; c[7] = 0; c[8] = 1;
298 c[9] = 1; c[10] = 0; c[11] = 1;
299 obj->NumVerts = 4;
300 obj->VertexOffset = 0;
301 obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts;
302 obj->VertexStride = 0;
303 obj->ColorStride = 0;
304 obj->NumElements = 0;
305 obj->MaxElement = 0;
306
307 glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
308
309 glGetBufferPointervARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAP_POINTER_ARB, &p);
310 assert(!p);
311
312 glGetBufferParameterivARB(GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAPPED_ARB, &i);
313 assert(!i);
314
315 if (Have_ARB_vertex_array_object) {
316 CreateVertexArrayObject(obj);
317 }
318 }
319
320
321 /*
322 * Interleaved position/color data.
323 */
324 static void MakeObject2(struct object *obj)
325 {
326 GLfloat *v;
327 int start = 40; /* bytes, to test non-zero array offsets */
328
329 glGenBuffersARB(1, &obj->VertexBufferID);
330 obj->ColorBufferID = obj->VertexBufferID;
331
332 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->VertexBufferID);
333 glBufferDataARB(GL_ARRAY_BUFFER_ARB, 1000, NULL, GL_STATIC_DRAW_ARB);
334 v = (GLfloat *) glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
335
336 v += start / sizeof(GLfloat);
337
338 /* Make triangle: interleaved colors, then positions */
339 /* R G B X Y Z */
340 v[0] = 0; v[1] = 1; v[2] = 0; v[3] = -1; v[4] = -1; v[5] = 0;
341 v[6] = 0; v[7] = 1; v[8] = 0; v[9] = 1; v[10] = -1; v[11] = 0;
342 v[12] = 1; v[13] = 1; v[14] = 0; v[15] = 0; v[16] = 1; v[17] = 0;
343
344 obj->NumVerts = 3;
345 obj->VertexOffset = start + 3 * sizeof(GLfloat);
346 obj->ColorOffset = start;
347 obj->VertexStride = 6 * sizeof(GLfloat);
348 obj->ColorStride = 6 * sizeof(GLfloat);
349
350 obj->NumElements = 0;
351 obj->MaxElement = 0;
352
353 glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
354
355 if (Have_ARB_vertex_array_object) {
356 CreateVertexArrayObject(obj);
357 }
358 }
359
360
361 /*
362 * Use an index buffer and glDrawElements().
363 */
364 static void MakeObject3(struct object *obj)
365 {
366 GLfloat vertexData[1000];
367 GLfloat *v, *c;
368 GLuint *i;
369 int bytes;
370
371 /* Make rectangle */
372 v = vertexData;
373 v[0] = -1; v[1] = -0.5; v[2] = 0;
374 v[3] = 1; v[4] = -0.5; v[5] = 0;
375 v[6] = 1; v[7] = 0.5; v[8] = 0;
376 v[9] = -1; v[10] = 0.5; v[11] = 0;
377 c = vertexData + 12;
378 c[0] = 0; c[1] = 0; c[2] = 1;
379 c[3] = 0; c[4] = 0; c[5] = 1;
380 c[6] = 0; c[7] = 1; c[8] = 1;
381 c[9] = 0; c[10] = 1; c[11] = 1;
382 obj->NumVerts = 4;
383 obj->VertexOffset = 0;
384 obj->ColorOffset = 3 * sizeof(GLfloat) * obj->NumVerts;
385 obj->VertexStride = 0;
386 obj->ColorStride = 0;
387
388 bytes = obj->NumVerts * (3 + 3) * sizeof(GLfloat);
389
390 /* Don't use glMap/UnmapBuffer for this object */
391 glGenBuffersARB(1, &obj->VertexBufferID);
392 obj->ColorBufferID = obj->VertexBufferID;
393
394 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->VertexBufferID);
395 glBufferDataARB(GL_ARRAY_BUFFER_ARB, bytes, vertexData, GL_STATIC_DRAW_ARB);
396
397 /* Setup a buffer of indices to test the ELEMENTS path */
398 glGenBuffersARB(1, &obj->ElementsBufferID);
399 glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, obj->ElementsBufferID);
400 glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 100, NULL, GL_STATIC_DRAW_ARB);
401 i = (GLuint *) glMapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_READ_WRITE_ARB);
402 i[0] = 0;
403 i[1] = 1;
404 i[2] = 2;
405 i[3] = 3;
406 glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB);
407 obj->NumElements = 4;
408 obj->MaxElement = 3;
409
410 if (Have_ARB_vertex_array_object) {
411 CreateVertexArrayObject(obj);
412 }
413 }
414
415
416 /*
417 * Vertex and color data in different buffers.
418 */
419 static void MakeObject4(struct object *obj)
420 {
421 static const GLfloat vertexData[] = {
422 0, -1, 0,
423 0.5, 0, 0,
424 0, 1, 0,
425 -0.5, 0, 0
426 };
427 static const GLfloat colorData[] = {
428 1, 1, 1,
429 1, 1, 0,
430 .5, .5, 0,
431 1, 1, 0
432 };
433
434 obj->VertexOffset = 0;
435 obj->VertexStride = 0;
436 obj->ColorOffset = 0;
437 obj->ColorStride = 0;
438 obj->NumVerts = 4;
439
440 glGenBuffersARB(1, &obj->VertexBufferID);
441 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->VertexBufferID);
442 glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(vertexData), vertexData,
443 GL_STATIC_DRAW_ARB);
444
445 glGenBuffersARB(1, &obj->ColorBufferID);
446 glBindBufferARB(GL_ARRAY_BUFFER_ARB, obj->ColorBufferID);
447 glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(colorData), colorData,
448 GL_STATIC_DRAW_ARB);
449
450 /* Setup a buffer of indices to test the ELEMENTS path */
451 obj->ElementsBufferID = 0;
452 obj->NumElements = 0;
453 obj->MaxElement = 0;
454
455 if (Have_ARB_vertex_array_object) {
456 CreateVertexArrayObject(obj);
457 }
458 }
459
460
461
462 static void Init( void )
463 {
464 if (!glutExtensionSupported("GL_ARB_vertex_buffer_object")) {
465 printf("GL_ARB_vertex_buffer_object not found!\n");
466 exit(0);
467 }
468 printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
469
470 Have_ARB_vertex_array_object =
471 glutExtensionSupported("GL_ARB_vertex_array_object");
472
473 printf("Using GL_ARB_vertex_array_object: %s\n",
474 (Have_ARB_vertex_array_object ? "yes" : "no"));
475
476
477 /* Test buffer object deletion */
478 if (1) {
479 static GLubyte data[1000];
480 GLuint id = 999;
481 glBindBufferARB(GL_ARRAY_BUFFER_ARB, id);
482 glBufferDataARB(GL_ARRAY_BUFFER_ARB, 1000, data, GL_STATIC_DRAW_ARB);
483 glVertexPointer(3, GL_FLOAT, 0, (void *) 0);
484 glDeleteBuffersARB(1, &id);
485 assert(!glIsBufferARB(id));
486 glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
487 glVertexPointer(3, GL_FLOAT, 0, (void *) 0);
488 assert(!glIsBufferARB(id));
489 }
490
491 memset(Objects, 0, sizeof(Objects));
492 MakeObject1(Objects + 0);
493 MakeObject2(Objects + 1);
494 MakeObject3(Objects + 2);
495 MakeObject4(Objects + 3);
496 NumObjects = 4;
497 }
498
499
500 int main( int argc, char *argv[] )
501 {
502 glutInit( &argc, argv );
503 glutInitWindowPosition( 0, 0 );
504 glutInitWindowSize( 600, 300 );
505 glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
506 Win = glutCreateWindow(argv[0]);
507 glewInit();
508 glutReshapeFunc( Reshape );
509 glutKeyboardFunc( Key );
510 glutSpecialFunc( SpecialKey );
511 glutDisplayFunc( Display );
512 if (Anim)
513 glutIdleFunc(Idle);
514 Init();
515 glutMainLoop();
516 return 0;
517 }