prim.c revision 32001f49 
1#include <stdio.h>
2#include <string.h>
3#include <stdlib.h>
4#include <GL/glew.h>
5#include "glut_wrap.h"
6
7
8#define PIXEL_CENTER(x) ((long)(x) + 0.5)
9
10#define GAP 10
11#define ROWS 3
12#define COLS 4
13
14#define OPENGL_WIDTH 48
15#define OPENGL_HEIGHT 13
16
17
18GLenum provoking = GL_LAST_VERTEX_CONVENTION_EXT;
19GLenum rgb, doubleBuffer, windType;
20GLint windW, windH;
21
22GLenum mode1, mode2;
23GLint boxW, boxH;
24GLubyte OpenGL_bits[] = {
25   0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
26   0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01,
27   0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01,
28   0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
29   0x3e, 0x8f, 0xb7, 0xf9, 0xfc, 0x01,
30   0x63, 0xdb, 0xb0, 0x8d, 0x0d, 0x00,
31   0x63, 0xdb, 0xb7, 0x8d, 0x0d, 0x00,
32   0x63, 0xdb, 0xb6, 0x8d, 0x0d, 0x00,
33   0x63, 0x8f, 0xf3, 0xcc, 0x0d, 0x00,
34   0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0a,
35   0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0e,
36   0x63, 0x00, 0x00, 0x8c, 0xed, 0x0e,
37   0x3e, 0x00, 0x00, 0xf8, 0x0c, 0x00,
38};
39
40
41#include "tkmap.c"
42
43static void Init(void)
44{
45
46    mode1 = GL_TRUE;
47    mode2 = GL_TRUE;
48}
49
50static void Reshape(int width, int height)
51{
52
53    windW = (GLint)width;
54    windH = (GLint)height;
55}
56
57static void RotateColorMask(void)
58{
59    static GLint rotation = 0;
60
61    rotation = (rotation + 1) & 0x3;
62    switch (rotation) {
63      case 0:
64	glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
65	glIndexMask( 0xff );
66	break;
67      case 1:
68	glColorMask(GL_FALSE, GL_TRUE, GL_TRUE, GL_TRUE);
69	glIndexMask(0xFE);
70	break;
71      case 2:
72	glColorMask(GL_TRUE, GL_FALSE, GL_TRUE, GL_TRUE);
73	glIndexMask(0xFD);
74	break;
75      case 3:
76	glColorMask(GL_TRUE, GL_TRUE, GL_FALSE, GL_TRUE);
77	glIndexMask(0xFB);
78	break;
79    }
80}
81
82static void Key(unsigned char key, int x, int y)
83{
84
85    switch (key) {
86      case 27:
87	exit(1);
88      case '1':
89	mode1 = !mode1;
90	break;
91      case '2':
92	mode2 = !mode2;
93	break;
94      case '3':
95	RotateColorMask();
96	break;
97      case 'p':
98         if (provoking == GL_FIRST_VERTEX_CONVENTION_EXT) {
99            printf("provoke last\n");
100            provoking = GL_LAST_VERTEX_CONVENTION_EXT;
101         }
102         else {
103            printf("provoke first\n");
104            provoking = GL_FIRST_VERTEX_CONVENTION_EXT;
105         }
106         glProvokingVertexEXT(provoking);
107         break;
108      default:
109	return;
110    }
111
112    glutPostRedisplay();
113}
114
115static void Viewport(GLint row, GLint column)
116{
117    GLint x, y;
118
119    boxW = (windW - (COLS + 1) * GAP) / COLS;
120    boxH = (windH - (ROWS + 1) * GAP) / ROWS;
121
122    x = GAP + column * (boxW + GAP);
123    y = GAP + row * (boxH + GAP);
124
125    glViewport(x, y, boxW, boxH);
126
127    glMatrixMode(GL_PROJECTION);
128    glLoadIdentity();
129    glOrtho(-boxW/2, boxW/2, -boxH/2, boxH/2, 0.0, 1.0);
130    glMatrixMode(GL_MODELVIEW);
131
132    glEnable(GL_SCISSOR_TEST);
133    glScissor(x, y, boxW, boxH);
134}
135
136static void Point(void)
137{
138    GLint i;
139
140    glBegin(GL_POINTS);
141	SetColor(COLOR_WHITE);
142	glVertex2i(0, 0);
143	for (i = 1; i < 8; i++) {
144	    GLint j = i * 2;
145	    SetColor(COLOR_BLACK+i);
146	    glVertex2i(-j, -j);
147	    glVertex2i(-j, 0);
148	    glVertex2i(-j, j);
149	    glVertex2i(0, j);
150	    glVertex2i(j, j);
151	    glVertex2i(j, 0);
152	    glVertex2i(j, -j);
153	    glVertex2i(0, -j);
154	}
155    glEnd();
156}
157
158static void Lines(void)
159{
160    GLint i;
161
162    glPushMatrix();
163
164    glTranslatef(-12, 0, 0);
165    for (i = 1; i < 8; i++) {
166	glBegin(GL_LINES);
167	    SetColor(COLOR_BLACK+i);
168	    glVertex2i(-boxW/4, -boxH/4);
169	    SetColor(COLOR_BLACK+i+1);
170	    glVertex2i(boxW/4, boxH/4);
171	glEnd();
172	glTranslatef(4, 0, 0);
173    }
174
175    glPopMatrix();
176
177    glBegin(GL_LINES);
178	glVertex2i(0, 0);
179    glEnd();
180}
181
182static void LineStrip(void)
183{
184
185    glBegin(GL_LINE_STRIP);
186	SetColor(COLOR_RED);
187	glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4));
188	SetColor(COLOR_GREEN);
189	glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4));
190	SetColor(COLOR_BLUE);
191	glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4));
192	SetColor(COLOR_WHITE);
193	glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4));
194    glEnd();
195
196    glBegin(GL_LINE_STRIP);
197	glVertex2i(0, 0);
198    glEnd();
199}
200
201static void LineLoop(void)
202{
203
204    glBegin(GL_LINE_LOOP);
205	SetColor(COLOR_RED);
206	glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4));
207	SetColor(COLOR_GREEN);
208	glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4));
209	SetColor(COLOR_BLUE);
210	glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4));
211	SetColor(COLOR_WHITE);
212	glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4));
213    glEnd();
214
215    glEnable(GL_LOGIC_OP);
216    glLogicOp(GL_XOR);
217
218    glEnable(GL_BLEND);
219    glBlendFunc(GL_ONE, GL_ONE);
220
221    SetColor(COLOR_MAGENTA);
222    glBegin(GL_LINE_LOOP);
223	glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(-boxH/8));
224	glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8));
225    glEnd();
226    glBegin(GL_LINE_LOOP);
227	glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8+5));
228	glVertex2f(PIXEL_CENTER(boxW/8), PIXEL_CENTER(boxH/8+5));
229    glEnd();
230    glDisable(GL_LOGIC_OP);
231    glDisable(GL_BLEND);
232
233    SetColor(COLOR_GREEN);
234    glBegin(GL_POINTS);
235	glVertex2i(0, 0);
236    glEnd();
237
238    glBegin(GL_LINE_LOOP);
239	glVertex2i(0, 0);
240    glEnd();
241}
242
243static void Bitmap(void)
244{
245
246    glBegin(GL_LINES);
247	SetColor(COLOR_GREEN);
248	glVertex2i(-boxW/2, 0);
249	glVertex2i(boxW/2, 0);
250	glVertex2i(0, -boxH/2);
251	glVertex2i(0, boxH/2);
252	SetColor(COLOR_RED);
253	glVertex2i(0, -3);
254	glVertex2i(0, -3+OPENGL_HEIGHT);
255	SetColor(COLOR_BLUE);
256	glVertex2i(0, -3);
257	glVertex2i(OPENGL_WIDTH, -3);
258    glEnd();
259
260    SetColor(COLOR_GREEN);
261
262    glPixelStorei(GL_UNPACK_LSB_FIRST, GL_TRUE);
263    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
264
265    glRasterPos2i(0, 0);
266    glBitmap(OPENGL_WIDTH, OPENGL_HEIGHT, 0, 3, 0.0, 0.0, OpenGL_bits);
267}
268
269static void Triangles(void)
270{
271
272    glBegin(GL_TRIANGLES);
273	SetColor(COLOR_GREEN);
274	glVertex2i(-boxW/4, -boxH/4);
275	SetColor(COLOR_RED);
276	glVertex2i(-boxW/8, -boxH/16);
277	SetColor(COLOR_BLUE);
278	glVertex2i(boxW/8, -boxH/16);
279
280	SetColor(COLOR_GREEN);
281	glVertex2i(-boxW/4, boxH/4);
282	SetColor(COLOR_RED);
283	glVertex2i(-boxW/8, boxH/16);
284	SetColor(COLOR_BLUE);
285	glVertex2i(boxW/8, boxH/16);
286    glEnd();
287
288    glBegin(GL_TRIANGLES);
289	glVertex2i(0, 0);
290	glVertex2i(-100, 100);
291    glEnd();
292}
293
294static void TriangleStrip(void)
295{
296
297    glBegin(GL_TRIANGLE_STRIP);
298	SetColor(COLOR_GREEN);
299	glVertex2i(-boxW/4, -boxH/4);
300	SetColor(COLOR_RED);
301	glVertex2i(-boxW/4, boxH/4);
302	SetColor(COLOR_BLUE);
303	glVertex2i(0, -boxH/4);
304	SetColor(COLOR_WHITE);
305	glVertex2i(0, boxH/4);
306	SetColor(COLOR_CYAN);
307	glVertex2i(boxW/4, -boxH/4);
308	SetColor(COLOR_YELLOW);
309	glVertex2i(boxW/4, boxH/4);
310    glEnd();
311
312    glBegin(GL_TRIANGLE_STRIP);
313	glVertex2i(0, 0);
314	glVertex2i(-100, 100);
315    glEnd();
316}
317
318static void TriangleFan(void)
319{
320    GLint vx[8][2];
321    GLint x0, y0, x1, y1, x2, y2, x3, y3;
322    GLint i;
323
324    y0 = -boxH/4;
325    y1 = y0 + boxH/2/3;
326    y2 = y1 + boxH/2/3;
327    y3 = boxH/4;
328    x0 = -boxW/4;
329    x1 = x0 + boxW/2/3;
330    x2 = x1 + boxW/2/3;
331    x3 = boxW/4;
332
333    vx[0][0] = x0; vx[0][1] = y1;
334    vx[1][0] = x0; vx[1][1] = y2;
335    vx[2][0] = x1; vx[2][1] = y3;
336    vx[3][0] = x2; vx[3][1] = y3;
337    vx[4][0] = x3; vx[4][1] = y2;
338    vx[5][0] = x3; vx[5][1] = y1;
339    vx[6][0] = x2; vx[6][1] = y0;
340    vx[7][0] = x1; vx[7][1] = y0;
341
342    glBegin(GL_TRIANGLE_FAN);
343	SetColor(COLOR_WHITE);
344	glVertex2i(0, 0);
345	for (i = 0; i < 8; i++) {
346	    SetColor(COLOR_WHITE-i);
347	    glVertex2iv(vx[i]);
348	}
349    glEnd();
350
351    glBegin(GL_TRIANGLE_FAN);
352	glVertex2i(0, 0);
353	glVertex2i(-100, 100);
354    glEnd();
355}
356
357static void Rect(void)
358{
359
360    SetColor(COLOR_GREEN);
361    glRecti(-boxW/4, -boxH/4, boxW/4, boxH/4);
362}
363
364static void PolygonFunc(void)
365{
366    GLint vx[8][2];
367    GLint x0, y0, x1, y1, x2, y2, x3, y3;
368    GLint i;
369
370    y0 = -boxH/4;
371    y1 = y0 + boxH/2/3;
372    y2 = y1 + boxH/2/3;
373    y3 = boxH/4;
374    x0 = -boxW/4;
375    x1 = x0 + boxW/2/3;
376    x2 = x1 + boxW/2/3;
377    x3 = boxW/4;
378
379    vx[0][0] = x0; vx[0][1] = y1;
380    vx[1][0] = x0; vx[1][1] = y2;
381    vx[2][0] = x1; vx[2][1] = y3;
382    vx[3][0] = x2; vx[3][1] = y3;
383    vx[4][0] = x3; vx[4][1] = y2;
384    vx[5][0] = x3; vx[5][1] = y1;
385    vx[6][0] = x2; vx[6][1] = y0;
386    vx[7][0] = x1; vx[7][1] = y0;
387
388    glBegin(GL_POLYGON);
389	for (i = 0; i < 8; i++) {
390	    SetColor(COLOR_WHITE-i);
391	    glVertex2iv(vx[i]);
392	}
393    glEnd();
394
395    glBegin(GL_POLYGON);
396	glVertex2i(0, 0);
397	glVertex2i(100, 100);
398    glEnd();
399}
400
401static void Quads(void)
402{
403
404    glBegin(GL_QUADS);
405	SetColor(COLOR_GREEN);
406	glVertex2i(-boxW/4, -boxH/4);
407	SetColor(COLOR_RED);
408	glVertex2i(-boxW/8, -boxH/16);
409	SetColor(COLOR_BLUE);
410	glVertex2i(boxW/8, -boxH/16);
411	SetColor(COLOR_WHITE);
412	glVertex2i(boxW/4, -boxH/4);
413
414	SetColor(COLOR_GREEN);
415	glVertex2i(-boxW/4, boxH/4);
416	SetColor(COLOR_RED);
417	glVertex2i(-boxW/8, boxH/16);
418	SetColor(COLOR_BLUE);
419	glVertex2i(boxW/8, boxH/16);
420	SetColor(COLOR_WHITE);
421	glVertex2i(boxW/4, boxH/4);
422    glEnd();
423
424    glBegin(GL_QUADS);
425	glVertex2i(0, 0);
426	glVertex2i(100, 100);
427	glVertex2i(-100, 100);
428    glEnd();
429}
430
431static void QuadStrip(void)
432{
433
434    glBegin(GL_QUAD_STRIP);
435	SetColor(COLOR_GREEN);
436	glVertex2i(-boxW/4, -boxH/4);
437	SetColor(COLOR_RED);
438	glVertex2i(-boxW/4, boxH/4);
439	SetColor(COLOR_BLUE);
440	glVertex2i(0, -boxH/4);
441	SetColor(COLOR_WHITE);
442	glVertex2i(0, boxH/4);
443	SetColor(COLOR_CYAN);
444	glVertex2i(boxW/4, -boxH/4);
445	SetColor(COLOR_YELLOW);
446	glVertex2i(boxW/4, boxH/4);
447    glEnd();
448
449    glBegin(GL_QUAD_STRIP);
450	glVertex2i(0, 0);
451	glVertex2i(100, 100);
452	glVertex2i(-100, 100);
453    glEnd();
454}
455
456static void Draw(void)
457{
458
459    glViewport(0, 0, windW, windH);
460    glDisable(GL_SCISSOR_TEST);
461
462    glPushAttrib(GL_COLOR_BUFFER_BIT);
463
464    glColorMask(1, 1, 1, 1);
465    glIndexMask(~0);
466
467    glClearColor(0.0, 0.0, 0.0, 0.0);
468    glClear(GL_COLOR_BUFFER_BIT);
469
470    glPopAttrib();
471
472    if (mode1) {
473	glShadeModel(GL_SMOOTH);
474    } else {
475	glShadeModel(GL_FLAT);
476    }
477
478    if (mode2) {
479	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
480    } else {
481	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
482    }
483
484    Viewport(0, 0); Point();
485    Viewport(0, 1); Lines();
486    Viewport(0, 2); LineStrip();
487    Viewport(0, 3); LineLoop();
488
489    Viewport(1, 0); Bitmap();
490    Viewport(1, 1); TriangleFan();
491    Viewport(1, 2); Triangles();
492    Viewport(1, 3); TriangleStrip();
493
494    Viewport(2, 0); Rect();
495    Viewport(2, 1); PolygonFunc();
496    Viewport(2, 2); Quads();
497    Viewport(2, 3); QuadStrip();
498
499    glFlush();
500
501    if (doubleBuffer) {
502	glutSwapBuffers();
503    }
504}
505
506static GLenum Args(int argc, char **argv)
507{
508    GLint i;
509
510    rgb = GL_TRUE;
511    doubleBuffer = GL_FALSE;
512
513    for (i = 1; i < argc; i++) {
514	if (strcmp(argv[i], "-ci") == 0) {
515	    rgb = GL_FALSE;
516	} else if (strcmp(argv[i], "-rgb") == 0) {
517	    rgb = GL_TRUE;
518	} else if (strcmp(argv[i], "-sb") == 0) {
519	    doubleBuffer = GL_FALSE;
520	} else if (strcmp(argv[i], "-db") == 0) {
521	    doubleBuffer = GL_TRUE;
522	} else {
523	    printf("%s (Bad option).\n", argv[i]);
524	    return GL_FALSE;
525	}
526    }
527    return GL_TRUE;
528}
529
530int main(int argc, char **argv)
531{
532    glutInit(&argc, argv);
533
534    if (Args(argc, argv) == GL_FALSE) {
535	exit(1);
536    }
537
538    windW = 600;
539    windH = 300;
540    glutInitWindowPosition(0, 0); glutInitWindowSize( windW, windH);
541
542    windType = (rgb) ? GLUT_RGB : GLUT_INDEX;
543    windType |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
544    glutInitDisplayMode(windType);
545
546    if (glutCreateWindow("Primitive Test") == GL_FALSE) {
547	exit(1);
548    }
549
550    glewInit();
551    InitMap();
552
553    Init();
554
555    glutReshapeFunc(Reshape);
556    glutKeyboardFunc(Key);
557    glutDisplayFunc(Draw);
558    glutMainLoop();
559	return 0;
560}
561