2 * Copyright © 2008 Kristian Høgsberg
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
34 #include <EGL/eglext.h>
36 #include <linux/input.h>
37 #include <wayland-client.h>
38 #include <wayland-cursor.h>
43 struct window *window;
44 struct widget *widget;
64 struct gear_template {
73 static const struct gear_template gear_templates[] = {
74 { { 0.8, 0.1, 0.0, 1.0 }, 1.0, 4.0, 1.0, 20, 0.7 },
75 { { 0.0, 0.8, 0.2, 1.0 }, 0.5, 2.0, 2.0, 10, 0.7 },
76 { { 0.2, 0.2, 1.0, 1.0 }, 1.3, 2.0, 0.5, 10, 0.7 },
79 static GLfloat light_pos[4] = {5.0, 5.0, 10.0, 0.0};
81 static void die(const char *msg)
83 fprintf(stderr, "%s", msg);
88 make_gear(const struct gear_template *t)
95 glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, t->material);
98 r1 = t->outer_radius - t->tooth_depth / 2.0;
99 r2 = t->outer_radius + t->tooth_depth / 2.0;
101 da = 2.0 * M_PI / t->teeth / 4.0;
103 glShadeModel(GL_FLAT);
105 glNormal3f(0.0, 0.0, 1.0);
107 /* draw front face */
108 glBegin(GL_QUAD_STRIP);
109 for (i = 0; i <= t->teeth; i++) {
110 angle = i * 2.0 * M_PI / t->teeth;
111 glVertex3f(r0 * cos(angle), r0 * sin(angle), t->width * 0.5);
112 glVertex3f(r1 * cos(angle), r1 * sin(angle), t->width * 0.5);
114 glVertex3f(r0 * cos(angle), r0 * sin(angle), t->width * 0.5);
115 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), t->width * 0.5);
120 /* draw front sides of teeth */
122 da = 2.0 * M_PI / t->teeth / 4.0;
123 for (i = 0; i < t->teeth; i++) {
124 angle = i * 2.0 * M_PI / t->teeth;
126 glVertex3f(r1 * cos(angle), r1 * sin(angle), t->width * 0.5);
127 glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), t->width * 0.5);
128 glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), t->width * 0.5);
129 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), t->width * 0.5);
133 glNormal3f(0.0, 0.0, -1.0);
136 glBegin(GL_QUAD_STRIP);
137 for (i = 0; i <= t->teeth; i++) {
138 angle = i * 2.0 * M_PI / t->teeth;
139 glVertex3f(r1 * cos(angle), r1 * sin(angle), -t->width * 0.5);
140 glVertex3f(r0 * cos(angle), r0 * sin(angle), -t->width * 0.5);
142 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -t->width * 0.5);
143 glVertex3f(r0 * cos(angle), r0 * sin(angle), -t->width * 0.5);
148 /* draw back sides of teeth */
150 da = 2.0 * M_PI / t->teeth / 4.0;
151 for (i = 0; i < t->teeth; i++) {
152 angle = i * 2.0 * M_PI / t->teeth;
154 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -t->width * 0.5);
155 glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -t->width * 0.5);
156 glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -t->width * 0.5);
157 glVertex3f(r1 * cos(angle), r1 * sin(angle), -t->width * 0.5);
161 /* draw outward faces of teeth */
162 glBegin(GL_QUAD_STRIP);
163 for (i = 0; i < t->teeth; i++) {
164 angle = i * 2.0 * M_PI / t->teeth;
166 glVertex3f(r1 * cos(angle), r1 * sin(angle), t->width * 0.5);
167 glVertex3f(r1 * cos(angle), r1 * sin(angle), -t->width * 0.5);
168 u = r2 * cos(angle + da) - r1 * cos(angle);
169 v = r2 * sin(angle + da) - r1 * sin(angle);
170 len = sqrt(u * u + v * v);
173 glNormal3f(v, -u, 0.0);
174 glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), t->width * 0.5);
175 glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -t->width * 0.5);
176 glNormal3f(cos(angle), sin(angle), 0.0);
177 glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), t->width * 0.5);
178 glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -t->width * 0.5);
179 u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
180 v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
181 glNormal3f(v, -u, 0.0);
182 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), t->width * 0.5);
183 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -t->width * 0.5);
184 glNormal3f(cos(angle), sin(angle), 0.0);
187 glVertex3f(r1 * cos(0), r1 * sin(0), t->width * 0.5);
188 glVertex3f(r1 * cos(0), r1 * sin(0), -t->width * 0.5);
192 glShadeModel(GL_SMOOTH);
194 /* draw inside radius cylinder */
195 glBegin(GL_QUAD_STRIP);
196 for (i = 0; i <= t->teeth; i++) {
197 angle = i * 2.0 * M_PI / t->teeth;
198 glNormal3f(-cos(angle), -sin(angle), 0.0);
199 glVertex3f(r0 * cos(angle), r0 * sin(angle), -t->width * 0.5);
200 glVertex3f(r0 * cos(angle), r0 * sin(angle), t->width * 0.5);
206 frame_callback(void *data, struct wl_callback *callback, uint32_t time)
208 struct gears *gears = data;
210 gears->angle = (GLfloat) (time % 8192) * 360 / 8192.0;
212 window_schedule_redraw(gears->window);
215 wl_callback_destroy(callback);
218 static const struct wl_callback_listener listener = {
223 motion_handler(struct widget *widget, struct input *input,
224 uint32_t time, float x, float y, void *data)
226 struct gears *gears = data;
227 int offset_x, offset_y;
230 if (gears->button_down) {
231 offset_x = x - gears->last_x;
232 offset_y = y - gears->last_y;
235 gears->view.roty += offset_x * step;
236 gears->view.rotx += offset_y * step;
237 if (gears->view.roty >= 360)
238 gears->view.roty = gears->view.roty - 360;
239 if (gears->view.roty <= 0)
240 gears->view.roty = gears->view.roty + 360;
241 if (gears->view.rotx >= 360)
242 gears->view.rotx = gears->view.rotx - 360;
243 if (gears->view.rotx <= 0)
244 gears->view.rotx = gears->view.rotx + 360;
247 return WL_CURSOR_LEFT_PTR;
251 button_handler(struct widget *widget, struct input *input,
252 uint32_t time, uint32_t button, uint32_t state, void *data)
254 struct gears *gears = data;
256 if (button == BTN_LEFT) {
258 gears->button_down = 1;
259 input_get_position(input,
260 &gears->last_x, &gears->last_y);
262 gears->button_down = 0;
268 redraw_handler(struct widget *widget, void *data)
270 struct rectangle window_allocation;
271 struct rectangle allocation;
272 struct wl_callback *callback;
273 struct gears *gears = data;
275 widget_get_allocation(gears->widget, &allocation);
276 window_get_allocation(gears->window, &window_allocation);
278 if (display_acquire_window_surface(gears->d,
280 gears->context) < 0) {
281 die("Unable to acquire window surface, "
282 "compiled without cairo-egl?\n");
285 glViewport(allocation.x,
286 window_allocation.height - allocation.height - allocation.y,
287 allocation.width, allocation.height);
288 glScissor(allocation.x,
289 window_allocation.height - allocation.height - allocation.y,
290 allocation.width, allocation.height);
292 glEnable(GL_SCISSOR_TEST);
293 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
297 glTranslatef(0.0, 0.0, -50);
299 glRotatef(gears->view.rotx, 1.0, 0.0, 0.0);
300 glRotatef(gears->view.roty, 0.0, 1.0, 0.0);
303 glTranslatef(-3.0, -2.0, 0.0);
304 glRotatef(gears->angle, 0.0, 0.0, 1.0);
305 glCallList(gears->gear_list[0]);
309 glTranslatef(3.1, -2.0, 0.0);
310 glRotatef(-2.0 * gears->angle - 9.0, 0.0, 0.0, 1.0);
311 glCallList(gears->gear_list[1]);
315 glTranslatef(-3.1, 4.2, 0.0);
316 glRotatef(-2.0 * gears->angle - 25.0, 0.0, 0.0, 1.0);
317 glCallList(gears->gear_list[2]);
324 display_release_window_surface(gears->d, gears->window);
326 callback = wl_surface_frame(window_get_wl_surface(gears->window));
327 wl_callback_add_listener(callback, &listener, gears);
331 resize_handler(struct widget *widget,
332 int32_t width, int32_t height, void *data)
334 struct gears *gears = data;
336 /* Constrain child size to be square and at least 300x300 */
346 widget_set_size(gears->widget, width, height);
350 keyboard_focus_handler(struct window *window,
351 struct input *device, void *data)
353 window_schedule_redraw(window);
356 static struct gears *
357 gears_create(struct display *display)
359 const int width = 450, height = 500;
363 gears = malloc(sizeof *gears);
364 memset(gears, 0, sizeof *gears);
366 gears->window = window_create(display);
367 gears->widget = frame_create(gears->window, gears);
368 window_set_title(gears->window, "Wayland Gears");
370 gears->display = display_get_egl_display(gears->d);
371 if (gears->display == NULL)
372 die("failed to create egl display\n");
374 eglBindAPI(EGL_OPENGL_API);
376 gears->config = display_get_argb_egl_config(gears->d);
378 gears->context = eglCreateContext(gears->display, gears->config,
379 EGL_NO_CONTEXT, NULL);
380 if (gears->context == NULL)
381 die("failed to create context\n");
383 if (!eglMakeCurrent(gears->display, NULL, NULL, gears->context))
384 die("failed to make context current\n");
386 for (i = 0; i < 3; i++) {
387 gears->gear_list[i] = glGenLists(1);
388 glNewList(gears->gear_list[i], GL_COMPILE);
389 make_gear(&gear_templates[i]);
393 gears->button_down = 0;
397 gears->view.rotx = 20.0;
398 gears->view.roty = 30.0;
400 glEnable(GL_NORMALIZE);
402 glMatrixMode(GL_PROJECTION);
404 glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 200.0);
405 glMatrixMode(GL_MODELVIEW);
407 glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
408 glEnable(GL_CULL_FACE);
409 glEnable(GL_LIGHTING);
411 glEnable(GL_DEPTH_TEST);
412 glClearColor(0, 0, 0, 0.92);
414 window_set_user_data(gears->window, gears);
415 widget_set_resize_handler(gears->widget, resize_handler);
416 widget_set_redraw_handler(gears->widget, redraw_handler);
417 widget_set_button_handler(gears->widget, button_handler);
418 widget_set_motion_handler(gears->widget, motion_handler);
419 window_set_keyboard_focus_handler(gears->window,
420 keyboard_focus_handler);
422 window_schedule_resize(gears->window, width, height);
427 int main(int argc, char *argv[])
431 d = display_create(argc, argv);
433 fprintf(stderr, "failed to create display: %m\n");