1 files changed, 485 insertions, 0 deletions

diff --git a/clients/gears.c b/clients/gears.c
new file mode 100644
index 00000000..30f4e688
--- /dev/null
+++ b/clients/gears.c
@@ -0,0 +1,485 @@
+/*
+ * Copyright © 2008 Kristian Høgsberg
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include "config.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <time.h>
+
+#include <GL/gl.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <linux/input.h>
+#include <wayland-client.h>
+
+#include "window.h"
+
+struct gears {
+	struct window *window;
+	struct widget *widget;
+
+	struct display *d;
+
+	EGLDisplay display;
+	EGLDisplay config;
+	EGLContext context;
+	GLfloat angle;
+
+	struct {
+		GLfloat rotx;
+		GLfloat roty;
+	} view;
+
+	int button_down;
+	int last_x, last_y;
+
+	GLint gear_list[3];
+	int fullscreen;
+	int frames;
+	uint32_t last_fps;
+};
+
+struct gear_template {
+	GLfloat material[4];
+	GLfloat inner_radius;
+	GLfloat outer_radius;
+	GLfloat width;
+	GLint teeth;
+	GLfloat tooth_depth;
+};
+
+static const struct gear_template gear_templates[] = {
+	{ { 0.8, 0.1, 0.0, 1.0 }, 1.0, 4.0, 1.0, 20, 0.7 },
+	{ { 0.0, 0.8, 0.2, 1.0 }, 0.5, 2.0, 2.0, 10, 0.7 },
+	{ { 0.2, 0.2, 1.0, 1.0 }, 1.3, 2.0, 0.5, 10, 0.7 }, 
+};
+
+static GLfloat light_pos[4] = {5.0, 5.0, 10.0, 0.0};
+
+static void die(const char *msg)
+{
+	fprintf(stderr, "%s", msg);
+	exit(EXIT_FAILURE);
+}
+
+static void
+make_gear(const struct gear_template *t)
+{
+	GLint i;
+	GLfloat r0, r1, r2;
+	GLfloat angle, da;
+	GLfloat u, v, len;
+
+	glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, t->material);
+
+	r0 = t->inner_radius;
+	r1 = t->outer_radius - t->tooth_depth / 2.0;
+	r2 = t->outer_radius + t->tooth_depth / 2.0;
+
+	da = 2.0 * M_PI / t->teeth / 4.0;
+
+	glShadeModel(GL_FLAT);
+
+	glNormal3f(0.0, 0.0, 1.0);
+
+	/* draw front face */
+	glBegin(GL_QUAD_STRIP);
+	for (i = 0; i <= t->teeth; i++) {
+		angle = i * 2.0 * M_PI / t->teeth;
+		glVertex3f(r0 * cos(angle), r0 * sin(angle), t->width * 0.5);
+		glVertex3f(r1 * cos(angle), r1 * sin(angle), t->width * 0.5);
+		if (i < t->teeth) {
+			glVertex3f(r0 * cos(angle), r0 * sin(angle), t->width * 0.5);
+			glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), t->width * 0.5);
+		}
+	}
+	glEnd();
+
+	/* draw front sides of teeth */
+	glBegin(GL_QUADS);
+	da = 2.0 * M_PI / t->teeth / 4.0;
+	for (i = 0; i < t->teeth; i++) {
+		angle = i * 2.0 * M_PI / t->teeth;
+
+		glVertex3f(r1 * cos(angle), r1 * sin(angle), t->width * 0.5);
+		glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), t->width * 0.5);
+		glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), t->width * 0.5);
+		glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), t->width * 0.5);
+	}
+	glEnd();
+
+	glNormal3f(0.0, 0.0, -1.0);
+
+	/* draw back face */
+	glBegin(GL_QUAD_STRIP);
+	for (i = 0; i <= t->teeth; i++) {
+		angle = i * 2.0 * M_PI / t->teeth;
+		glVertex3f(r1 * cos(angle), r1 * sin(angle), -t->width * 0.5);
+		glVertex3f(r0 * cos(angle), r0 * sin(angle), -t->width * 0.5);
+		if (i < t->teeth) {
+			glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -t->width * 0.5);
+			glVertex3f(r0 * cos(angle), r0 * sin(angle), -t->width * 0.5);
+		}
+	}
+	glEnd();
+
+	/* draw back sides of teeth */
+	glBegin(GL_QUADS);
+	da = 2.0 * M_PI / t->teeth / 4.0;
+	for (i = 0; i < t->teeth; i++) {
+		angle = i * 2.0 * M_PI / t->teeth;
+
+		glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -t->width * 0.5);
+		glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -t->width * 0.5);
+		glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -t->width * 0.5);
+		glVertex3f(r1 * cos(angle), r1 * sin(angle), -t->width * 0.5);
+	}
+	glEnd();
+
+	/* draw outward faces of teeth */
+	glBegin(GL_QUAD_STRIP);
+	for (i = 0; i < t->teeth; i++) {
+		angle = i * 2.0 * M_PI / t->teeth;
+
+		glVertex3f(r1 * cos(angle), r1 * sin(angle), t->width * 0.5);
+		glVertex3f(r1 * cos(angle), r1 * sin(angle), -t->width * 0.5);
+		u = r2 * cos(angle + da) - r1 * cos(angle);
+		v = r2 * sin(angle + da) - r1 * sin(angle);
+		len = sqrt(u * u + v * v);
+		u /= len;
+		v /= len;
+		glNormal3f(v, -u, 0.0);
+		glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), t->width * 0.5);
+		glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -t->width * 0.5);
+		glNormal3f(cos(angle), sin(angle), 0.0);
+		glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), t->width * 0.5);
+		glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -t->width * 0.5);
+		u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
+		v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
+		glNormal3f(v, -u, 0.0);
+		glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), t->width * 0.5);
+		glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -t->width * 0.5);
+		glNormal3f(cos(angle), sin(angle), 0.0);
+	}
+
+	glVertex3f(r1 * cos(0), r1 * sin(0), t->width * 0.5);
+	glVertex3f(r1 * cos(0), r1 * sin(0), -t->width * 0.5);
+
+	glEnd();
+
+	glShadeModel(GL_SMOOTH);
+
+	/* draw inside radius cylinder */
+	glBegin(GL_QUAD_STRIP);
+	for (i = 0; i <= t->teeth; i++) {
+		angle = i * 2.0 * M_PI / t->teeth;
+		glNormal3f(-cos(angle), -sin(angle), 0.0);
+		glVertex3f(r0 * cos(angle), r0 * sin(angle), -t->width * 0.5);
+		glVertex3f(r0 * cos(angle), r0 * sin(angle), t->width * 0.5);
+	}
+	glEnd();
+}
+
+static void
+update_fps(struct gears *gears, uint32_t time)
+{
+	long diff_ms;
+
+	gears->frames++;
+
+	diff_ms = time - gears->last_fps;
+
+	if (diff_ms > 5000) {
+		float seconds = diff_ms / 1000.0;
+		float fps = gears->frames / seconds;
+
+		printf("%d frames in %6.3f seconds = %6.3f FPS\n", gears->frames, seconds, fps);
+		fflush(stdout);
+
+		gears->frames = 0;
+		gears->last_fps = time;
+	}
+}
+
+static void
+frame_callback(void *data, struct wl_callback *callback, uint32_t time)
+{
+	struct gears *gears = data;
+
+	update_fps(gears, time);
+
+	gears->angle = (GLfloat) (time % 8192) * 360 / 8192.0;
+
+	window_schedule_redraw(gears->window);
+
+	if (callback)
+		wl_callback_destroy(callback);
+}
+
+static const struct wl_callback_listener listener = {
+	frame_callback
+};
+
+static int
+motion_handler(struct widget *widget, struct input *input,
+		uint32_t time, float x, float y, void *data)
+{
+	struct gears *gears = data;
+	int offset_x, offset_y;
+	float step = 0.5;
+
+	if (gears->button_down) {
+		offset_x = x - gears->last_x;
+		offset_y = y - gears->last_y;
+		gears->last_x = x;
+		gears->last_y = y;
+		gears->view.roty += offset_x * step;
+		gears->view.rotx += offset_y * step;
+		if (gears->view.roty >= 360)
+			gears->view.roty = gears->view.roty - 360;
+		if (gears->view.roty <= 0)
+			gears->view.roty = gears->view.roty + 360;
+		if (gears->view.rotx >= 360)
+			gears->view.rotx = gears->view.rotx - 360;
+		if (gears->view.rotx <= 0)
+			gears->view.rotx = gears->view.rotx + 360;
+	}
+
+	return CURSOR_LEFT_PTR;
+}
+
+static void
+button_handler(struct widget *widget, struct input *input,
+		uint32_t time, uint32_t button,
+		enum wl_pointer_button_state state, void *data)
+{
+	struct gears *gears = data;
+
+	if (button == BTN_LEFT) {
+		if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
+			gears->button_down = 1;
+			input_get_position(input,
+					&gears->last_x, &gears->last_y);
+		} else {
+			gears->button_down = 0;
+		}
+	}
+}
+
+static void
+redraw_handler(struct widget *widget, void *data)
+{
+	struct rectangle window_allocation;
+	struct rectangle allocation;
+	struct wl_callback *callback;
+	struct gears *gears = data;
+
+	widget_get_allocation(gears->widget, &allocation);
+	window_get_allocation(gears->window, &window_allocation);
+
+	if (display_acquire_window_surface(gears->d,
+					    gears->window,
+					    gears->context) < 0) {
+		die("Unable to acquire window surface, "
+		    "compiled without cairo-egl?\n");
+	}
+	
+	glViewport(allocation.x,
+		   window_allocation.height - allocation.height - allocation.y,
+		   allocation.width, allocation.height);
+	glScissor(allocation.x,
+		  window_allocation.height - allocation.height - allocation.y,
+		  allocation.width, allocation.height);
+
+	glEnable(GL_SCISSOR_TEST);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	glPushMatrix();
+
+	glTranslatef(0.0, 0.0, -50);
+
+	glRotatef(gears->view.rotx, 1.0, 0.0, 0.0);
+	glRotatef(gears->view.roty, 0.0, 1.0, 0.0);
+
+	glPushMatrix();
+	glTranslatef(-3.0, -2.0, 0.0);
+	glRotatef(gears->angle, 0.0, 0.0, 1.0);
+	glCallList(gears->gear_list[0]);
+	glPopMatrix();
+
+	glPushMatrix();
+	glTranslatef(3.1, -2.0, 0.0);
+	glRotatef(-2.0 * gears->angle - 9.0, 0.0, 0.0, 1.0);
+	glCallList(gears->gear_list[1]);
+	glPopMatrix();
+
+	glPushMatrix();
+	glTranslatef(-3.1, 4.2, 0.0);
+	glRotatef(-2.0 * gears->angle - 25.0, 0.0, 0.0, 1.0);
+	glCallList(gears->gear_list[2]);
+	glPopMatrix();
+
+	glPopMatrix();
+
+	glFlush();
+
+	display_release_window_surface(gears->d, gears->window);
+
+	callback = wl_surface_frame(window_get_wl_surface(gears->window));
+	wl_callback_add_listener(callback, &listener, gears);
+}
+
+static void
+resize_handler(struct widget *widget,
+	       int32_t width, int32_t height, void *data)
+{
+	struct gears *gears = data;
+	int32_t size, big, small;
+
+	/* Constrain child size to be square and at least 300x300 */
+	if (width < height) {
+		small = width;
+		big = height;
+	} else {
+		small = height;
+		big = width;
+	}
+
+	if (gears->fullscreen)
+		size = small;
+	else
+		size = big;
+
+	widget_set_size(gears->widget, size, size);
+}
+
+static void
+keyboard_focus_handler(struct window *window,
+		       struct input *device, void *data)
+{
+	window_schedule_redraw(window);
+}
+
+static void
+fullscreen_handler(struct window *window, void *data)
+{
+	struct gears *gears = data;
+
+	gears->fullscreen ^= 1;
+	window_set_fullscreen(window, gears->fullscreen);
+}
+
+static struct gears *
+gears_create(struct display *display)
+{
+	const int width = 450, height = 500;
+	struct gears *gears;
+	struct timeval tv;
+	int i;
+
+	gears = zalloc(sizeof *gears);
+	gears->d = display;
+	gears->window = window_create(display);
+	gears->widget = frame_create(gears->window, gears);
+	window_set_title(gears->window, "Wayland Gears");
+
+	gears->display = display_get_egl_display(gears->d);
+	if (gears->display == NULL)
+		die("failed to create egl display\n");
+
+	eglBindAPI(EGL_OPENGL_API);
+
+	gears->config = display_get_argb_egl_config(gears->d);
+
+	gears->context = eglCreateContext(gears->display, gears->config,
+					  EGL_NO_CONTEXT, NULL);
+	if (gears->context == NULL)
+		die("failed to create context\n");
+
+	if (!eglMakeCurrent(gears->display, NULL, NULL, gears->context))
+		die("failed to make context current\n");
+
+	for (i = 0; i < 3; i++) {
+		gears->gear_list[i] = glGenLists(1);
+		glNewList(gears->gear_list[i], GL_COMPILE);
+		make_gear(&gear_templates[i]);
+		glEndList();
+	}
+
+	gears->button_down = 0;
+	gears->last_x = 0;
+	gears->last_y = 0;
+
+	gears->view.rotx = 20.0;
+	gears->view.roty = 30.0;
+
+	gettimeofday(&tv, NULL);
+	gears->last_fps = tv.tv_sec * 1000 + tv.tv_usec / 1000;
+	printf("Warning: FPS count is limited by the wayland compositor or monitor refresh rate\n");
+
+	glEnable(GL_NORMALIZE);
+
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 200.0);
+	glMatrixMode(GL_MODELVIEW);
+
+	glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
+	glEnable(GL_CULL_FACE);
+	glEnable(GL_LIGHTING);
+	glEnable(GL_LIGHT0);
+	glEnable(GL_DEPTH_TEST);
+	glClearColor(0, 0, 0, 0.92);
+
+	window_set_user_data(gears->window, gears);
+	widget_set_resize_handler(gears->widget, resize_handler);
+	widget_set_redraw_handler(gears->widget, redraw_handler);
+	widget_set_button_handler(gears->widget, button_handler);
+	widget_set_motion_handler(gears->widget, motion_handler);
+	window_set_keyboard_focus_handler(gears->window,
+					  keyboard_focus_handler);
+	window_set_fullscreen_handler(gears->window, fullscreen_handler);
+
+	window_schedule_resize(gears->window, width, height);
+
+	return gears;
+}
+
+int main(int argc, char *argv[])
+{
+	struct display *d;
+
+	d = display_create(&argc, argv);
+	if (d == NULL) {
+		fprintf(stderr, "failed to create display: %m\n");
+		return -1;
+	}
+	gears_create(d);
+	display_run(d);
+
+	return 0;
+}