You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
428 lines
12 KiB
428 lines
12 KiB
/*
|
|
* 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 <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <math.h>
|
|
#include <time.h>
|
|
#include <cairo.h>
|
|
#include <glib.h>
|
|
|
|
#define GL_GLEXT_PROTOTYPES
|
|
#define EGL_EGLEXT_PROTOTYPES
|
|
#include <GL/gl.h>
|
|
#include <EGL/egl.h>
|
|
#include <EGL/eglext.h>
|
|
|
|
#include "wayland-util.h"
|
|
#include "wayland-client.h"
|
|
#include "wayland-glib.h"
|
|
|
|
#include "window.h"
|
|
|
|
struct gears {
|
|
struct window *window;
|
|
|
|
struct display *d;
|
|
struct rectangle rectangle;
|
|
|
|
EGLDisplay display;
|
|
EGLContext context;
|
|
int drm_fd;
|
|
GLfloat angle;
|
|
cairo_surface_t *cairo_surface;
|
|
|
|
GLint gear_list[3];
|
|
GLuint fbo, color_rbo[2], depth_rbo;
|
|
cairo_surface_t *surface[2];
|
|
int current;
|
|
};
|
|
|
|
struct gear_template {
|
|
GLfloat material[4];
|
|
GLfloat inner_radius;
|
|
GLfloat outer_radius;
|
|
GLfloat width;
|
|
GLint teeth;
|
|
GLfloat tooth_depth;
|
|
};
|
|
|
|
const static 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
|
|
allocate_buffer(struct gears *gears)
|
|
{
|
|
EGLImageKHR image;
|
|
|
|
/* Constrain child size to be square and at least 300x300 */
|
|
window_get_child_rectangle(gears->window, &gears->rectangle);
|
|
if (gears->rectangle.width > gears->rectangle.height)
|
|
gears->rectangle.height = gears->rectangle.width;
|
|
else
|
|
gears->rectangle.width = gears->rectangle.height;
|
|
if (gears->rectangle.width < 300) {
|
|
gears->rectangle.width = 300;
|
|
gears->rectangle.height = 300;
|
|
}
|
|
|
|
window_set_child_size(gears->window, &gears->rectangle);
|
|
window_draw(gears->window);
|
|
|
|
gears->surface[gears->current] = window_get_surface(gears->window);
|
|
#ifdef HAVE_CAIRO_GL
|
|
image = display_get_image_for_drm_surface(gears->display,
|
|
gears->surface[gears->current]);
|
|
#else /* XXX: hack to make Wayland compile, even if this example doesn't run */
|
|
die("gears cannot allocate buffer: it was compiled without cairo-gl\n");
|
|
return;
|
|
#endif
|
|
if (!eglMakeCurrent(gears->display, NULL, NULL, gears->context))
|
|
die("faile to make context current\n");
|
|
|
|
glBindRenderbuffer(GL_RENDERBUFFER_EXT,
|
|
gears->color_rbo[gears->current]);
|
|
glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER, image);
|
|
|
|
glBindRenderbuffer(GL_RENDERBUFFER_EXT, gears->depth_rbo);
|
|
glRenderbufferStorage(GL_RENDERBUFFER_EXT,
|
|
GL_DEPTH_COMPONENT,
|
|
gears->rectangle.width + 20 + 32,
|
|
gears->rectangle.height + 60 + 32);
|
|
}
|
|
|
|
static void
|
|
draw_gears(struct gears *gears)
|
|
{
|
|
GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
|
|
|
|
if (gears->surface[gears->current] == NULL)
|
|
allocate_buffer(gears);
|
|
|
|
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER_EXT,
|
|
GL_COLOR_ATTACHMENT0_EXT,
|
|
GL_RENDERBUFFER_EXT,
|
|
gears->color_rbo[gears->current]);
|
|
|
|
glViewport(gears->rectangle.x, gears->rectangle.y,
|
|
gears->rectangle.width, gears->rectangle.height);
|
|
glScissor(gears->rectangle.x, gears->rectangle.y,
|
|
gears->rectangle.width, gears->rectangle.height);
|
|
|
|
glEnable(GL_SCISSOR_TEST);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glPushMatrix();
|
|
|
|
glTranslatef(0.0, 0.0, -50);
|
|
|
|
glRotatef(view_rotx, 1.0, 0.0, 0.0);
|
|
glRotatef(view_roty, 0.0, 1.0, 0.0);
|
|
glRotatef(view_rotz, 0.0, 0.0, 1.0);
|
|
|
|
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();
|
|
|
|
window_set_surface(gears->window, gears->surface[gears->current]);
|
|
window_flush(gears->window);
|
|
}
|
|
|
|
static void
|
|
resize_handler(struct window *window, void *data)
|
|
{
|
|
struct gears *gears = data;
|
|
|
|
cairo_surface_destroy(gears->surface[0]);
|
|
gears->surface[0] = NULL;
|
|
cairo_surface_destroy(gears->surface[1]);
|
|
gears->surface[1] = NULL;
|
|
}
|
|
|
|
static void
|
|
keyboard_focus_handler(struct window *window,
|
|
struct input *device, void *data)
|
|
{
|
|
struct gears *gears = data;
|
|
|
|
resize_handler(window, gears);
|
|
}
|
|
|
|
static void
|
|
redraw_handler(struct window *window, void *data)
|
|
{
|
|
struct gears *gears = data;
|
|
|
|
draw_gears(gears);
|
|
}
|
|
|
|
static void
|
|
frame_callback(void *data, uint32_t time)
|
|
{
|
|
struct gears *gears = data;
|
|
|
|
gears->current = 1 - gears->current;
|
|
|
|
gears->angle = (GLfloat) (time % 8192) * 360 / 8192.0;
|
|
|
|
window_schedule_redraw(gears->window);
|
|
wl_display_frame_callback(display_get_display(gears->d),
|
|
frame_callback, gears);
|
|
}
|
|
|
|
static struct gears *
|
|
gears_create(struct display *display)
|
|
{
|
|
const int width = 450, height = 500;
|
|
struct gears *gears;
|
|
int i;
|
|
|
|
gears = malloc(sizeof *gears);
|
|
memset(gears, 0, sizeof *gears);
|
|
gears->d = display;
|
|
gears->window = window_create(display, "Wayland Gears", width, height);
|
|
|
|
gears->display = display_get_egl_display(gears->d);
|
|
if (gears->display == NULL)
|
|
die("failed to create egl display\n");
|
|
|
|
eglBindAPI(EGL_OPENGL_API);
|
|
|
|
gears->context = eglCreateContext(gears->display,
|
|
NULL, EGL_NO_CONTEXT, NULL);
|
|
if (gears->context == NULL)
|
|
die("failed to create context\n");
|
|
|
|
if (!eglMakeCurrent(gears->display, NULL, NULL, gears->context))
|
|
die("faile to make context current\n");
|
|
|
|
glGenFramebuffers(1, &gears->fbo);
|
|
glBindFramebuffer(GL_FRAMEBUFFER_EXT, gears->fbo);
|
|
|
|
glGenRenderbuffers(2, gears->color_rbo);
|
|
glGenRenderbuffers(1, &gears->depth_rbo);
|
|
glBindRenderbuffer(GL_RENDERBUFFER_EXT, gears->depth_rbo);
|
|
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER_EXT,
|
|
GL_DEPTH_ATTACHMENT_EXT,
|
|
GL_RENDERBUFFER_EXT,
|
|
gears->depth_rbo);
|
|
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();
|
|
}
|
|
|
|
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);
|
|
window_set_resize_handler(gears->window, resize_handler);
|
|
window_set_keyboard_focus_handler(gears->window, keyboard_focus_handler);
|
|
window_set_redraw_handler(gears->window, redraw_handler);
|
|
|
|
draw_gears(gears);
|
|
wl_display_frame_callback(display_get_display(gears->d),
|
|
frame_callback, gears);
|
|
|
|
return gears;
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct display *d;
|
|
struct gears *gears;
|
|
|
|
d = display_create(&argc, &argv, NULL);
|
|
if (d == NULL) {
|
|
fprintf(stderr, "failed to create display: %m\n");
|
|
return -1;
|
|
}
|
|
gears = gears_create(d);
|
|
display_run(d);
|
|
|
|
return 0;
|
|
}
|
|
|