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
33 #include <cairo-drm.h>
38 #include "wayland-client.h"
39 #include "wayland-glib.h"
43 static const char gem_device[] = "/dev/dri/card0";
44 static const char socket_name[] = "\0wayland";
47 struct window *window;
49 struct wl_display *wl_display;
50 struct wl_compositor *compositor;
51 struct rectangle rectangle;
59 cairo_surface_t *cairo_surface;
64 struct gear_template {
73 const static 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 draw_gears(struct gears *gears)
208 GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
210 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
214 glTranslatef(0.0, 0.0, -50);
216 glRotatef(view_rotx, 1.0, 0.0, 0.0);
217 glRotatef(view_roty, 0.0, 1.0, 0.0);
218 glRotatef(view_rotz, 0.0, 0.0, 1.0);
221 glTranslatef(-3.0, -2.0, 0.0);
222 glRotatef(gears->angle, 0.0, 0.0, 1.0);
223 glCallList(gears->gear_list[0]);
227 glTranslatef(3.1, -2.0, 0.0);
228 glRotatef(-2.0 * gears->angle - 9.0, 0.0, 0.0, 1.0);
229 glCallList(gears->gear_list[1]);
233 glTranslatef(-3.1, 4.2, 0.0);
234 glRotatef(-2.0 * gears->angle - 25.0, 0.0, 0.0, 1.0);
235 glCallList(gears->gear_list[2]);
244 resize_window(struct gears *gears)
246 uint32_t name, stride;
248 /* Constrain child size to be square and at least 300x300 */
249 window_get_child_rectangle(gears->window, &gears->rectangle);
250 if (gears->rectangle.width > gears->rectangle.height)
251 gears->rectangle.height = gears->rectangle.width;
253 gears->rectangle.width = gears->rectangle.height;
254 if (gears->rectangle.width < 300) {
255 gears->rectangle.width = 300;
256 gears->rectangle.height = 300;
258 window_set_child_size(gears->window, &gears->rectangle);
260 window_draw(gears->window);
262 if (gears->cairo_surface != NULL)
263 cairo_surface_destroy(gears->cairo_surface);
265 gears->cairo_surface = window_create_surface(gears->window,
268 name = cairo_drm_surface_get_name(gears->cairo_surface);
269 stride = cairo_drm_surface_get_stride(gears->cairo_surface),
270 gears->surface = eglCreateSurfaceForName(gears->display,
273 gears->rectangle.width,
274 gears->rectangle.height,
277 eglMakeCurrent(gears->display,
278 gears->surface, gears->surface, gears->context);
280 glViewport(0, 0, gears->rectangle.width, gears->rectangle.height);
285 resize_handler(struct window *window, void *data)
287 struct gears *gears = data;
289 /* Right now, resizing the window from the per-frame callback
290 * is fine, since the window drawing code is so slow that we
291 * can't draw more than one window per frame anyway. However,
292 * once we implement faster resizing, this will show lag
293 * between pointer motion and window size even if resizing is
294 * fast. We need to keep processing motion events and posting
295 * new frames as fast as possible so when the server
296 * composites the next frame it will have the most recent size
297 * possible, like what we do for window moves. */
303 handle_acknowledge(void *data,
304 struct wl_compositor *compositor,
305 uint32_t key, uint32_t frame)
307 struct gears *gears = data;
313 resize_window(gears);
319 handle_frame(void *data,
320 struct wl_compositor *compositor,
321 uint32_t frame, uint32_t timestamp)
323 struct gears *gears = data;
325 window_copy_surface(gears->window,
327 gears->cairo_surface);
329 wl_compositor_commit(gears->compositor, 0);
331 gears->angle = timestamp / 20.0;
334 static const struct wl_compositor_listener compositor_listener = {
339 static struct gears *
340 gears_create(struct wl_display *display, int fd)
342 const int x = 200, y = 200, width = 450, height = 500;
343 EGLint major, minor, count;
344 EGLConfig configs[64];
346 struct udev_device *device;
351 device = udev_device_new_from_syspath(udev, "/sys/class/drm/card0");
353 gears = malloc(sizeof *gears);
354 memset(gears, 0, sizeof *gears);
355 gears->wl_display = display;
356 gears->window = window_create(display, fd, "Wayland Gears",
357 x, y, width, height);
359 gears->display = eglCreateDisplayNative(device);
360 if (gears->display == NULL)
361 die("failed to create egl display\n");
363 if (!eglInitialize(gears->display, &major, &minor))
364 die("failed to initialize display\n");
366 if (!eglGetConfigs(gears->display, configs, 64, &count))
367 die("failed to get configs\n");
369 gears->config = configs[24];
370 gears->context = eglCreateContext(gears->display, gears->config, NULL, NULL);
371 if (gears->context == NULL)
372 die("failed to create context\n");
374 resize_window(gears);
376 for (i = 0; i < 3; i++) {
377 gears->gear_list[i] = glGenLists(1);
378 glNewList(gears->gear_list[i], GL_COMPILE);
379 make_gear(&gear_templates[i]);
383 glEnable(GL_NORMALIZE);
385 glMatrixMode(GL_PROJECTION);
387 glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 200.0);
388 glMatrixMode(GL_MODELVIEW);
390 glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
391 glEnable(GL_CULL_FACE);
392 glEnable(GL_LIGHTING);
394 glEnable(GL_DEPTH_TEST);
395 glClearColor(0, 0, 0, 0.92);
397 gears->compositor = wl_display_get_compositor(display);
401 handle_frame(gears, gears->compositor, 0, 0);
403 window_set_resize_handler(gears->window, resize_handler, gears);
405 wl_compositor_add_listener(gears->compositor,
406 &compositor_listener, gears);
411 int main(int argc, char *argv[])
413 struct wl_display *display;
419 fd = open(gem_device, O_RDWR);
421 fprintf(stderr, "drm open failed: %m\n");
425 display = wl_display_create(socket_name, sizeof socket_name);
426 if (display == NULL) {
427 fprintf(stderr, "failed to create display: %m\n");
431 loop = g_main_loop_new(NULL, FALSE);
432 source = wl_glib_source_new(display);
433 g_source_attach(source, NULL);
435 gears = gears_create(display, fd);
437 g_main_loop_run(loop);