2 * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included
12 * in all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 * This is a port of the infamous "glxgears" demo to straight EGL
24 * Port by Dane Rushton 10 July 2005
26 * No command line options.
27 * Program runs for 5 seconds then exits, outputing framerate to console
30 #define EGL_EGLEXT_PROTOTYPES
39 #include <EGL/eglext.h>
41 #define MAX_CONFIGS 10
48 /* XXX this probably isn't very portable */
53 /* return current time (in seconds) */
59 (void) gettimeofday(&tv
, NULL
);
62 (void) gettimeofday(&tv
, &tz
);
64 return (double) tv
.tv_sec
+ tv
.tv_usec
/ 1000000.0;
73 /* update this function for other platforms! */
74 static double t
= 0.0;
77 fprintf(stderr
, "Warning: current_time() not implemented!!\n");
87 #define M_PI 3.14159265
91 static GLfloat view_rotx
= 20.0, view_roty
= 30.0, view_rotz
= 0.0;
92 static GLint gear1
, gear2
, gear3
;
93 static GLfloat angle
= 0.0;
96 static GLfloat eyesep
= 5.0; /* Eye separation. */
97 static GLfloat fix_point
= 40.0; /* Fixation point distance. */
98 static GLfloat left
, right
, asp
; /* Stereo frustum params. */
104 * Draw a gear wheel. You'll probably want to call this function when
105 * building a display list since we do a lot of trig here.
107 * Input: inner_radius - radius of hole at center
108 * outer_radius - radius at center of teeth
109 * width - width of gear
110 * teeth - number of teeth
111 * tooth_depth - depth of tooth
114 gear(GLfloat inner_radius
, GLfloat outer_radius
, GLfloat width
,
115 GLint teeth
, GLfloat tooth_depth
)
123 r1
= outer_radius
- tooth_depth
/ 2.0;
124 r2
= outer_radius
+ tooth_depth
/ 2.0;
126 da
= 2.0 * M_PI
/ teeth
/ 4.0;
128 glShadeModel(GL_FLAT
);
130 glNormal3f(0.0, 0.0, 1.0);
132 /* draw front face */
133 glBegin(GL_QUAD_STRIP
);
134 for (i
= 0; i
<= teeth
; i
++) {
135 angle
= i
* 2.0 * M_PI
/ teeth
;
136 glVertex3f(r0
* cos(angle
), r0
* sin(angle
), width
* 0.5);
137 glVertex3f(r1
* cos(angle
), r1
* sin(angle
), width
* 0.5);
139 glVertex3f(r0
* cos(angle
), r0
* sin(angle
), width
* 0.5);
140 glVertex3f(r1
* cos(angle
+ 3 * da
), r1
* sin(angle
+ 3 * da
),
146 /* draw front sides of teeth */
148 da
= 2.0 * M_PI
/ teeth
/ 4.0;
149 for (i
= 0; i
< teeth
; i
++) {
150 angle
= i
* 2.0 * M_PI
/ teeth
;
152 glVertex3f(r1
* cos(angle
), r1
* sin(angle
), width
* 0.5);
153 glVertex3f(r2
* cos(angle
+ da
), r2
* sin(angle
+ da
), width
* 0.5);
154 glVertex3f(r2
* cos(angle
+ 2 * da
), r2
* sin(angle
+ 2 * da
),
156 glVertex3f(r1
* cos(angle
+ 3 * da
), r1
* sin(angle
+ 3 * da
),
161 glNormal3f(0.0, 0.0, -1.0);
164 glBegin(GL_QUAD_STRIP
);
165 for (i
= 0; i
<= teeth
; i
++) {
166 angle
= i
* 2.0 * M_PI
/ teeth
;
167 glVertex3f(r1
* cos(angle
), r1
* sin(angle
), -width
* 0.5);
168 glVertex3f(r0
* cos(angle
), r0
* sin(angle
), -width
* 0.5);
170 glVertex3f(r1
* cos(angle
+ 3 * da
), r1
* sin(angle
+ 3 * da
),
172 glVertex3f(r0
* cos(angle
), r0
* sin(angle
), -width
* 0.5);
177 /* draw back sides of teeth */
179 da
= 2.0 * M_PI
/ teeth
/ 4.0;
180 for (i
= 0; i
< teeth
; i
++) {
181 angle
= i
* 2.0 * M_PI
/ teeth
;
183 glVertex3f(r1
* cos(angle
+ 3 * da
), r1
* sin(angle
+ 3 * da
),
185 glVertex3f(r2
* cos(angle
+ 2 * da
), r2
* sin(angle
+ 2 * da
),
187 glVertex3f(r2
* cos(angle
+ da
), r2
* sin(angle
+ da
), -width
* 0.5);
188 glVertex3f(r1
* cos(angle
), r1
* sin(angle
), -width
* 0.5);
192 /* draw outward faces of teeth */
193 glBegin(GL_QUAD_STRIP
);
194 for (i
= 0; i
< teeth
; i
++) {
195 angle
= i
* 2.0 * M_PI
/ teeth
;
197 glVertex3f(r1
* cos(angle
), r1
* sin(angle
), width
* 0.5);
198 glVertex3f(r1
* cos(angle
), r1
* sin(angle
), -width
* 0.5);
199 u
= r2
* cos(angle
+ da
) - r1
* cos(angle
);
200 v
= r2
* sin(angle
+ da
) - r1
* sin(angle
);
201 len
= sqrt(u
* u
+ v
* v
);
204 glNormal3f(v
, -u
, 0.0);
205 glVertex3f(r2
* cos(angle
+ da
), r2
* sin(angle
+ da
), width
* 0.5);
206 glVertex3f(r2
* cos(angle
+ da
), r2
* sin(angle
+ da
), -width
* 0.5);
207 glNormal3f(cos(angle
), sin(angle
), 0.0);
208 glVertex3f(r2
* cos(angle
+ 2 * da
), r2
* sin(angle
+ 2 * da
),
210 glVertex3f(r2
* cos(angle
+ 2 * da
), r2
* sin(angle
+ 2 * da
),
212 u
= r1
* cos(angle
+ 3 * da
) - r2
* cos(angle
+ 2 * da
);
213 v
= r1
* sin(angle
+ 3 * da
) - r2
* sin(angle
+ 2 * da
);
214 glNormal3f(v
, -u
, 0.0);
215 glVertex3f(r1
* cos(angle
+ 3 * da
), r1
* sin(angle
+ 3 * da
),
217 glVertex3f(r1
* cos(angle
+ 3 * da
), r1
* sin(angle
+ 3 * da
),
219 glNormal3f(cos(angle
), sin(angle
), 0.0);
222 glVertex3f(r1
* cos(0), r1
* sin(0), width
* 0.5);
223 glVertex3f(r1
* cos(0), r1
* sin(0), -width
* 0.5);
227 glShadeModel(GL_SMOOTH
);
229 /* draw inside radius cylinder */
230 glBegin(GL_QUAD_STRIP
);
231 for (i
= 0; i
<= teeth
; i
++) {
232 angle
= i
* 2.0 * M_PI
/ teeth
;
233 glNormal3f(-cos(angle
), -sin(angle
), 0.0);
234 glVertex3f(r0
* cos(angle
), r0
* sin(angle
), -width
* 0.5);
235 glVertex3f(r0
* cos(angle
), r0
* sin(angle
), width
* 0.5);
244 glClear(GL_COLOR_BUFFER_BIT
| GL_DEPTH_BUFFER_BIT
);
247 glRotatef(view_rotx
, 1.0, 0.0, 0.0);
248 glRotatef(view_roty
, 0.0, 1.0, 0.0);
249 glRotatef(view_rotz
, 0.0, 0.0, 1.0);
252 glTranslatef(-3.0, -2.0, 0.0);
253 glRotatef(angle
, 0.0, 0.0, 1.0);
258 glTranslatef(3.1, -2.0, 0.0);
259 glRotatef(-2.0 * angle
- 9.0, 0.0, 0.0, 1.0);
264 glTranslatef(-3.1, 4.2, 0.0);
265 glRotatef(-2.0 * angle
- 25.0, 0.0, 0.0, 1.0);
273 /* new window size or exposure */
275 reshape(int width
, int height
)
277 glViewport(0, 0, (GLint
) width
, (GLint
) height
);
279 GLfloat h
= (GLfloat
) height
/ (GLfloat
) width
;
281 glMatrixMode(GL_PROJECTION
);
283 glFrustum(-1.0, 1.0, -h
, h
, 5.0, 60.0);
285 glMatrixMode(GL_MODELVIEW
);
287 glTranslatef(0.0, 0.0, -40.0);
295 static GLfloat pos
[4] = { 5.0, 5.0, 10.0, 0.0 };
296 static GLfloat red
[4] = { 0.8, 0.1, 0.0, 1.0 };
297 static GLfloat green
[4] = { 0.0, 0.8, 0.2, 1.0 };
298 static GLfloat blue
[4] = { 0.2, 0.2, 1.0, 1.0 };
300 glLightfv(GL_LIGHT0
, GL_POSITION
, pos
);
301 glEnable(GL_CULL_FACE
);
302 glEnable(GL_LIGHTING
);
304 glEnable(GL_DEPTH_TEST
);
307 gear1
= glGenLists(1);
308 glNewList(gear1
, GL_COMPILE
);
309 glMaterialfv(GL_FRONT
, GL_AMBIENT_AND_DIFFUSE
, red
);
310 gear(1.0, 4.0, 1.0, 20, 0.7);
313 gear2
= glGenLists(1);
314 glNewList(gear2
, GL_COMPILE
);
315 glMaterialfv(GL_FRONT
, GL_AMBIENT_AND_DIFFUSE
, green
);
316 gear(0.5, 2.0, 2.0, 10, 0.7);
319 gear3
= glGenLists(1);
320 glNewList(gear3
, GL_COMPILE
);
321 glMaterialfv(GL_FRONT
, GL_AMBIENT_AND_DIFFUSE
, blue
);
322 gear(1.3, 2.0, 0.5, 10, 0.7);
325 glEnable(GL_NORMALIZE
);
331 static void run_gears(EGLDisplay dpy
, EGLSurface surf
, int ttr
)
333 double st
= current_time();
336 while (ct
- st
< ttr
)
338 double tt
= current_time();
342 /* advance rotation for next frame */
343 angle
+= 70.0 * dt
; /* 70 degrees per second */
349 eglSwapBuffers(dpy
, surf
);
355 GLfloat seconds
= ct
- st
;
356 GLfloat fps
= frames
/ seconds
;
357 printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames
, seconds
, fps
);
363 main(int argc
, char *argv
[])
367 EGLSurface screen_surf
;
368 EGLConfig configs
[MAX_CONFIGS
];
369 EGLint numConfigs
, i
;
372 EGLint screenAttribs
[10];
373 EGLModeMESA mode
[MAX_MODES
];
374 EGLScreenMESA screen
;
375 EGLint count
, chosenMode
;
376 GLboolean printInfo
= GL_FALSE
;
377 EGLint width
= 0, height
= 0;
379 /* parse cmd line args */
380 for (i
= 1; i
< argc
; i
++)
382 if (strcmp(argv
[i
], "-info") == 0)
387 printf("Warning: unknown parameter: %s\n", argv
[i
]);
390 /* DBR : Create EGL context/surface etc */
391 d
= eglGetDisplay((EGLNativeDisplayType
)"!EGL_i915");
394 if (!eglInitialize(d
, &maj
, &min
)) {
395 printf("eglgears: eglInitialize failed\n");
399 printf("eglgears: EGL version = %d.%d\n", maj
, min
);
400 printf("eglgears: EGL_VENDOR = %s\n", eglQueryString(d
, EGL_VENDOR
));
402 /* XXX use ChooseConfig */
403 eglGetConfigs(d
, configs
, MAX_CONFIGS
, &numConfigs
);
404 eglGetScreensMESA(d
, &screen
, 1, &count
);
406 if (!eglGetModesMESA(d
, screen
, mode
, MAX_MODES
, &count
) || count
== 0) {
407 printf("eglgears: eglGetModesMESA failed!\n");
411 /* Print list of modes, and find the one to use */
412 printf("eglgears: Found %d modes:\n", count
);
413 for (i
= 0; i
< count
; i
++) {
415 eglGetModeAttribMESA(d
, mode
[i
], EGL_WIDTH
, &w
);
416 eglGetModeAttribMESA(d
, mode
[i
], EGL_HEIGHT
, &h
);
417 printf("%3d: %d x %d\n", i
, w
, h
);
418 if (w
> width
&& h
> height
) {
424 printf("eglgears: Using screen mode/size %d: %d x %d\n", chosenMode
, width
, height
);
426 ctx
= eglCreateContext(d
, configs
[0], EGL_NO_CONTEXT
, NULL
);
427 if (ctx
== EGL_NO_CONTEXT
) {
428 printf("eglgears: failed to create context\n");
432 /* build up screenAttribs array */
434 screenAttribs
[i
++] = EGL_WIDTH
;
435 screenAttribs
[i
++] = width
;
436 screenAttribs
[i
++] = EGL_HEIGHT
;
437 screenAttribs
[i
++] = height
;
438 screenAttribs
[i
++] = EGL_NONE
;
440 screen_surf
= eglCreateScreenSurfaceMESA(d
, configs
[0], screenAttribs
);
441 if (screen_surf
== EGL_NO_SURFACE
) {
442 printf("eglgears: failed to create screen surface\n");
446 b
= eglShowScreenSurfaceMESA(d
, screen
, screen_surf
, mode
[chosenMode
]);
448 printf("eglgears: show surface failed\n");
452 b
= eglMakeCurrent(d
, screen_surf
, screen_surf
, ctx
);
454 printf("eglgears: make current failed\n");
460 printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER
));
461 printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION
));
462 printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR
));
463 printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS
));
467 reshape(width
, height
);
469 glDrawBuffer( GL_BACK
);
471 run_gears(d
, screen_surf
, 5.0);
473 eglDestroySurface(d
, screen_surf
);
474 eglDestroyContext(d
, ctx
);