Weston framerate (Re: bare bones opengl weston client sample)

jegde jedge bubbah.t at gmail.com
Fri Sep 14 07:32:03 PDT 2012


Sorry about the delay.
I flew 8 legs in 4 days this week.

Here are the mains for both the glut and Wayland instance of my test
application.

uMfdInit, uMfdDraw, and c->controller->event() are the interface
functions, solely used by both implementations.
The code under the hood is IDENTICAL. (with the exception of
glutPostRedisplay() for pan gestures.)

In MainWayland you will see simple-egl.c conditionally compiled for my
application using
HAVE_GLES2 and SIMPLE_EGL
Both MainWayland.c and MainGlut.c use the functions above in the same way.

To recap I am hoping to allow unbounded redraws for testing purposes only.


<MainGlut.c>
<code>
#include "uMfd.h"


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>

extern UmfdContext *c;


void glutMotion(int x, int y)
{
  c->controller->event(c, drag, x, y);
}

void glutMouse(int button, int state, int x, int y)
{
  if (button == GLUT_LEFT_BUTTON)
  {
    if (state == GLUT_UP)
      c->controller->event(c, leftUp, x, y);
    else
      c->controller->event(c, leftDown, x, y);
  }

  if (button == GLUT_RIGHT_BUTTON)
  {
    if (state == GLUT_UP)
      c->controller->event(c, rightUp, x, y);
    else
      c->controller->event(c, rightDown, x, y);
  }
}

void keyboardIn(unsigned char key, int x, int y)
{
  fprintf(stderr, "key-%x; x-%d; y-%d\n", 0x00ff & key, x, y);
  switch(key & 0xff)
  {
    case GLUT_KEY_UP:
      c->controller->event(c, upArrow, 0, 0);
      break;

    case GLUT_KEY_DOWN:
      c->controller->event(c, downArrow, 0, 0);
      break;

    case GLUT_KEY_RIGHT:
      c->controller->event(c, rightArrow, 0, 0);
      break;

    case GLUT_KEY_LEFT:
      c->controller->event(c, leftArrow, 0, 0);
      break;

    // PC menu tooggle
    case 0x1b:
fprintf(stderr, "glut KB esc menu");
      c->controller->event(c, menu, 0, 0);
      break;

    case '-':
    case '_':
    case 0x32:
      c->controller->event(c, zoomOut, 2, 2);
      break;

    case '=':
    case '+':
    case 0x33:
      c->controller->event(c, zoomIn, 3, 3);
      break;
    // PC menu select
    case 0xa:
    case 0xd:
fprintf(stderr, "glut KB enter menu select\n");
      c->controller->event(c, menuSelect, 0, 0);
      break;
  }
}


void glutDraw()
{
  uMfdDraw(c);
}

void glutIdle()
{
  uMfdProcess(c);
  //uMfdDraw(c);
}

void glutResize(int width, int height)
{
  c->view->resize(c, width, height);
}




int InitializeGraphics()
{
  int argc= 0;
  char *argv[] = {"one", "two"};


  fprintf(stderr, "pc glut init\n");
  glutInit(&argc, argv);

  /* defining the window with double buffer */
  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutEnterGameMode();
if(0)
{
  glutInitWindowSize(p.width, p.height);
  glutInitWindowPosition(100, 100);
}
//glutFullScreen();
//glutCreateWindow("FBCB2 uMFD 'micro'");

  glutDisplayFunc(glutDraw);
  glutMotionFunc(glutMotion);
  glutPassiveMotionFunc(glutMotion);
  glutMouseFunc(glutMouse);
  glutIdleFunc(glutIdle);
  glutSpecialFunc((void*)keyboardIn);
  glutKeyboardFunc((void*)keyboardIn);
  glutReshapeFunc(glutResize);

  glFrontFace(GL_CCW);
  glShadeModel(GL_SMOOTH);
  glEnable(GL_CULL_FACE);

  glDepthFunc(GL_LEQUAL);
  glEnable(GL_DEPTH_TEST);
  //glDepthMask(GL_TRUE);

  //glEnable(GL_NORMALIZE);
  //glEnable(GL_COLOR_MATERIAL);
  //glEnable(GL_TEXTURE_2D);
  glDisable(GL_STENCIL_TEST);
  glDisable(GL_ALPHA_TEST);
  glDisable(GL_SCISSOR_TEST);


{
GLfloat fSizes[2];
glGetFloatv(GL_SMOOTH_POINT_SIZE_RANGE, fSizes);
fprintf(stderr, "%f %f\n", fSizes[0], fSizes[1]);
}

glClearColor(0.5f, 0.5f, 0.5f, 1.0f);

printf("(e)GL engine initialized\n");

return(1);
}

int main(int argc, char *argv[])
{

  /* perform graphics initialization here */
  if (InitializeGraphics() == 0)
  {
    fprintf(stderr, "failed to initialize uMfd graphics interace\n");
    return(1);
  }

  /* start up the plugins */
  if (uMfdInit(argc, argv, UMFD_CONTEXT_GLUT) == 0)
  {
    fprintf(stderr, "failed to initialize uMfd plugin interface\n");
    fprintf(stderr, "failed to initialize uMfd plugin interface\n");
    return(1);
  }


  /* main render loop if needed */
  glutMainLoop();

  uMfdFree(c);

  /* return success */
  return(0);
}
</code>
</MainGlut.c>





<MainWayland.c>
<code>
/*
 * Copyright © 2011 Benjamin Franzke
 *
 * 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
#include <assert.h>
#include <signal.h>

#include <linux/input.h>

#include <wayland-client.h>
#include <wayland-egl.h>


#ifdef SIMPLE_EGL
#include <GLES2/gl2.h>
#include <EGL/egl.h>
#else

#include "uMfd.h"
/*
 * Core uMfd components
 */
extern UmfdContext masterContext;
extern UmfdContext *c;
int _x=0, _y=0;

#endif



struct window;
struct seat;

struct display {
        struct wl_display *display;
        struct wl_compositor *compositor;
        struct wl_shell *shell;
        struct wl_seat *seat;
        struct wl_pointer *pointer;
        struct wl_keyboard *keyboard;
        struct {
                EGLDisplay dpy;
                EGLContext ctx;
                EGLConfig conf;
        } egl;
        uint32_t mask;
        struct window *window;
};

struct geometry {
        int width, height;
};


struct window {
        struct display *display;
        struct geometry geometry, window_size, fullscreen_size;
        struct {
                GLuint fbo;
                GLuint color_rbo;

                GLuint rotation_uniform;

                GLuint pos;
                GLuint col;
        } gl;

        struct wl_egl_window *native;
        struct wl_surface *surface;
        struct wl_shell_surface *shell_surface;
        EGLSurface egl_surface;
        struct wl_callback *callback;
        int fullscreen, configured, opaque;
};

#ifdef HAVE_GLESS2
static const char *vert_shader_text =
        "uniform mat4 rotation;\n"
        "attribute vec4 pos;\n"
        "attribute vec4 color;\n"
        "varying vec4 v_color;\n"
        "void main() {\n"
        "  gl_Position = rotation * pos;\n"
        "  v_color = color;\n"
        "}\n";

static const char *frag_shader_text =
        "precision mediump float;\n"
        "varying vec4 v_color;\n"
        "void main() {\n"
        "  gl_FragColor = v_color;\n"
        "}\n";
#endif

static int running = 1;


static void
init_egl(struct display *display, int opaque)
{
        static const EGLint context_attribs[] = {
#ifdef HAVE_GLES2
                EGL_CONTEXT_CLIENT_VERSION, 2,
#endif
                EGL_NONE
        };

        EGLint config_attribs[] = {
                EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
                EGL_RED_SIZE, 1,
                EGL_GREEN_SIZE, 1,
                EGL_BLUE_SIZE, 1,
                EGL_ALPHA_SIZE, 1,
#ifdef HAVE_GLES2
                EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
#else
                EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
#endif
                EGL_NONE
        };

        EGLint major, minor, n;
        EGLBoolean ret;

#ifdef SIMPLE_EGL
        if (opaque)
                config_attribs[9] = 0;
#endif

        display->egl.dpy = eglGetDisplay(display->display);
        assert(display->egl.dpy);

        ret = eglInitialize(display->egl.dpy, &major, &minor);
        assert(ret == EGL_TRUE);
#ifdef HAVE_GLES2
        ret = eglBindAPI(EGL_OPENGL_ES_API);
#else
        ret = eglBindAPI(EGL_OPENGL_API);
#endif
        assert(ret == EGL_TRUE);

        ret = eglChooseConfig(display->egl.dpy, config_attribs,
                              &display->egl.conf, 1, &n);
        assert(ret && n == 1);


        display->egl.ctx = eglCreateContext(display->egl.dpy,
                                            display->egl.conf,
                                            EGL_NO_CONTEXT, context_attribs);
        assert(display->egl.ctx);

}

static void
fini_egl(struct display *display)
{
        /* Required, otherwise segfault in egl_dri2.c: dri2_make_current()
         * on eglReleaseThread(). */
        eglMakeCurrent(display->egl.dpy, EGL_NO_SURFACE, EGL_NO_SURFACE,
                       EGL_NO_CONTEXT);

        eglTerminate(display->egl.dpy);
        eglReleaseThread();
}

#ifdef HAVE_GLES2

static GLuint
create_shader(struct window *window, const char *source, GLenum shader_type)
{
        GLuint shader;
        GLint status;

        shader = glCreateShader(shader_type);
        assert(shader != 0);

        glShaderSource(shader, 1, (const char **) &source, NULL);
        glCompileShader(shader);

        glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
        if (!status) {
                char log[1000];
                GLsizei len;
                glGetShaderInfoLog(shader, 1000, &len, log);
                fprintf(stderr, "Error: compiling %s: %*s\n",
                        shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment",
                        len, log);
                exit(1);
        }

        return shader;
}
#endif

#ifdef HAVE_GLES2
static void
init_gl(struct window *window)
{
        GLuint frag, vert;
        GLuint program;
        GLint status;

        frag = create_shader(window, frag_shader_text, GL_FRAGMENT_SHADER);
        vert = create_shader(window, vert_shader_text, GL_VERTEX_SHADER);

        program = glCreateProgram();
        glAttachShader(program, frag);
        glAttachShader(program, vert);
        glLinkProgram(program);

        glGetProgramiv(program, GL_LINK_STATUS, &status);
        if (!status) {
                char log[1000];
                GLsizei len;
                glGetProgramInfoLog(program, 1000, &len, log);
                fprintf(stderr, "Error: linking:\n%*s\n", len, log);
                exit(1);
        }

        glUseProgram(program);

        window->gl.pos = 0;
        window->gl.col = 1;

        glBindAttribLocation(program, window->gl.pos, "pos");
        glBindAttribLocation(program, window->gl.col, "color");
        glLinkProgram(program);

        window->gl.rotation_uniform =
                glGetUniformLocation(program, "rotation");
}
#endif

static void
handle_ping(void *data, struct wl_shell_surface *shell_surface,
            uint32_t serial)
{
  fprintf(stderr, "MainWayland: handle_ping\n");
        wl_shell_surface_pong(shell_surface, serial);
}

static void
handle_configure(void *data, struct wl_shell_surface *shell_surface,
                 uint32_t edges, int32_t width, int32_t height)
{
        struct window *window = data;
  fprintf(stderr, "MainWayland: handle_configure\n");

        if (window->native)
                wl_egl_window_resize(window->native, width, height, 0, 0);

        window->geometry.width = width;
        window->geometry.height = height;

        if (window->fullscreen)
                window->fullscreen_size = window->geometry;
        else
                window->window_size = window->geometry;
}

static void
handle_popup_done(void *data, struct wl_shell_surface *shell_surface)
{
  fprintf(stderr, "MainWayland: handle_popup_done\n");
}

static const struct wl_shell_surface_listener shell_surface_listener = {
        handle_ping,
        handle_configure,
        handle_popup_done
};

static void
redraw(void *data, struct wl_callback *callback, uint32_t time);

static void
configure_callback(void *data, struct wl_callback *callback, uint32_t  time)
{
        struct window *window = data;
  fprintf(stderr, "MainWayland: configure_callback\n");

        wl_callback_destroy(callback);

        window->configured = 1;
        redraw(data, NULL, time);
}

static struct wl_callback_listener configure_callback_listener = {
        configure_callback,
};

static void
toggle_fullscreen(struct window *window, int fullscreen)
{
        struct wl_callback *callback;
  fprintf(stderr, "MainWayland: toggle_fullscreen\n");

        window->fullscreen = fullscreen;
        window->configured = 0;

        if (fullscreen) {
                wl_shell_surface_set_fullscreen(window->shell_surface,

WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT,
                                                0, NULL);
        } else {
                wl_shell_surface_set_toplevel(window->shell_surface);
                handle_configure(window, window->shell_surface, 0,
                                 window->window_size.width,
                                 window->window_size.height);
        }

        callback = wl_display_sync(window->display->display);
        wl_callback_add_listener(callback, &configure_callback_listener,
                                 window);
}

static void
create_surface(struct window *window)
{
        struct display *display = window->display;
        EGLBoolean ret;
  fprintf(stderr, "MainWayland: create_surface\n");

        window->surface = wl_compositor_create_surface(display->compositor);
        window->shell_surface = wl_shell_get_shell_surface(display->shell,
                                                           window->surface);

        wl_shell_surface_add_listener(window->shell_surface,
                                      &shell_surface_listener, window);

        window->native =
                wl_egl_window_create(window->surface,
                                     window->window_size.width,
                                     window->window_size.height);
        window->egl_surface =
                eglCreateWindowSurface(display->egl.dpy,
                                       display->egl.conf,
                                       window->native, NULL);

        ret = eglMakeCurrent(window->display->egl.dpy, window->egl_surface,
                             window->egl_surface, window->display->egl.ctx);
        assert(ret == EGL_TRUE);

        toggle_fullscreen(window, window->fullscreen);
}

static void
destroy_surface(struct window *window)
{
  fprintf(stderr, "MainWayland: destroy_surface\n");
        wl_egl_window_destroy(window->native);

        wl_shell_surface_destroy(window->shell_surface);
        wl_surface_destroy(window->surface);

        if (window->callback)
                wl_callback_destroy(window->callback);
}

static const struct wl_callback_listener frame_listener;

static void
redraw(void *data, struct wl_callback *callback, uint32_t time)
{
        struct window *window = data;
#ifdef SIMPLE_EGL
        static const GLfloat verts[3][2] = {
                { -0.5, -0.5 },
                {  0.5, -0.5 },
                {  0,    0.5 }
        };
        static const GLfloat colors[3][3] = {
                { 1, 0, 0 },
                { 0, 1, 0 },
                { 0, 0, 1 }
        };
        GLfloat angle;
        GLfloat rotation[4][4] = {
                { 1, 0, 0, 0 },
                { 0, 1, 0, 0 },
                { 0, 0, 1, 0 },
                { 0, 0, 0, 1 }
        };
        static const int32_t speed_div = 5;
        static uint32_t start_time = 0;
#endif
        struct wl_region *region;

        if (callback)
                wl_callback_destroy(callback);

#ifndef SIMPLE_EGL
if (window)
#endif
        if (!window->configured)
                return;

#ifdef SIMPLE_EGL
        if (start_time == 0)
                start_time = time;

        angle = ((time-start_time) / speed_div) % 360 * M_PI / 180.0;
        rotation[0][0] =  cos(angle);
        rotation[0][2] =  sin(angle);
        rotation[2][0] = -sin(angle);
        rotation[2][2] =  cos(angle);

        glViewport(0, 0, window->geometry.width, window->geometry.height);

        glUniformMatrix4fv(window->gl.rotation_uniform, 1, GL_FALSE,
                           (GLfloat *) rotation);

        glClearColor(0.0, 0.0, 0.0, 0.5);
        glClear(GL_COLOR_BUFFER_BIT);

        glVertexAttribPointer(window->gl.pos, 2, GL_FLOAT, GL_FALSE, 0, verts);
        glVertexAttribPointer(window->gl.col, 3, GL_FLOAT, GL_FALSE, 0, colors);
        glEnableVertexAttribArray(window->gl.pos);
        glEnableVertexAttribArray(window->gl.col);

        glDrawArrays(GL_TRIANGLES, 0, 3);

        glDisableVertexAttribArray(window->gl.pos);
        glDisableVertexAttribArray(window->gl.col);

#else
        uMfdDraw(c);
#endif
        eglSwapBuffers(window->display->egl.dpy, window->egl_surface);


#ifdef SIMPLE_EGL
        if (window->opaque) {
                region =
wl_compositor_create_region(window->display->compositor);
                wl_region_add(region, 0, 0,
                              window->window_size.width,
                              window->window_size.height);
                wl_surface_set_opaque_region(window->surface, region);
                wl_region_destroy(region);
        }
#endif

#ifndef SIMPLE_EGL
if (window)
{
#endif
        window->callback = wl_surface_frame(window->surface);
        wl_callback_add_listener(window->callback, &frame_listener, window);
#ifndef SIMPLE_EGL
}
#endif
}

static const struct wl_callback_listener frame_listener = {
        redraw
};

static void
pointer_handle_enter(void *data, struct wl_pointer *pointer,
                     uint32_t serial, struct wl_surface *surface,
                     wl_fixed_t sx, wl_fixed_t sy)
{
        struct display *display = data;
  fprintf(stderr, "MainWayland: pointer_handle_enter\n");

        if (display->window->fullscreen)
                wl_pointer_set_cursor(pointer, serial, NULL, 0, 0);
}

static void
pointer_handle_leave(void *data, struct wl_pointer *pointer,
                     uint32_t serial, struct wl_surface *surface)
{
  fprintf(stderr, "MainWayland: pointer_handle_leave\n");
}

static void
pointer_handle_motion(void *data, struct wl_pointer *pointer,
                      uint32_t time, wl_fixed_t sx, wl_fixed_t sy)
{
#ifndef SIMPLE_EGL
        _x=sx/256;
        _y=sy/256;
        c->controller->event(c, drag, _x, _y);
#endif
}

static void
pointer_handle_button(void *data, struct wl_pointer *wl_pointer,
                      uint32_t serial, uint32_t time, uint32_t button,
                      uint32_t state)
{
#ifndef SIMPLE_EGL

  if (button == BTN_LEFT)
  {
    if (state == WL_POINTER_BUTTON_STATE_PRESSED)
      c->controller->event(c, leftDown, _x, _y);
    else
      c->controller->event(c, leftUp, _x, _y);
  }

  else if (button == BTN_RIGHT)
  {
    if (state == WL_POINTER_BUTTON_STATE_PRESSED)
      c->controller->event(c, rightDown, _x, _y);
    else
      c->controller->event(c, rightUp, _x, _y);
  }

#else
        struct display *display = data;

        if (button == BTN_LEFT && state == WL_POINTER_BUTTON_STATE_PRESSED)
                wl_shell_surface_move(display->window->shell_surface,
                                      display->seat, serial);
#endif
}

static void
pointer_handle_axis(void *data, struct wl_pointer *wl_pointer,
                    uint32_t time, uint32_t axis, wl_fixed_t value)
{
  fprintf(stderr, "MainWayland: pointer_handle_axis\n");
}

static const struct wl_pointer_listener pointer_listener = {
        pointer_handle_enter,
        pointer_handle_leave,
        pointer_handle_motion,
        pointer_handle_button,
        pointer_handle_axis,
};

static void
keyboard_handle_keymap(void *data, struct wl_keyboard *keyboard,
                       uint32_t format, int fd, uint32_t size)
{
  fprintf(stderr, "MainWayland: keyboard_handle_keymap\n");
}

static void
keyboard_handle_enter(void *data, struct wl_keyboard *keyboard,
                      uint32_t serial, struct wl_surface *surface,
                      struct wl_array *keys)
{
  fprintf(stderr, "MainWayland: keyboard_handle_enter\n");
}

static void
keyboard_handle_leave(void *data, struct wl_keyboard *keyboard,
                      uint32_t serial, struct wl_surface *surface)
{
  fprintf(stderr, "MainWayland: keyboard_handle_leave\n");
}

static void
keyboard_handle_key(void *data, struct wl_keyboard *keyboard,
                    uint32_t serial, uint32_t time, uint32_t key,
                    uint32_t state)
{
        struct display *d = data;
  fprintf(stderr, "MainWayland: keyboard_handle_key\n");


        if (key == KEY_F11 && state)
                toggle_fullscreen(d->window, d->window->fullscreen ^ 1);
        else if (key == KEY_ESC && state)
#ifdef SIMPLE_EGL
                running = 0;
#else
                c->controller->event(c, menu, 0, 0);
        else if (key == KEY_UP && state)
                c->controller->event(c, upArrow, 0, 0);
        else if (key == KEY_RIGHT && state)
                c->controller->event(c, rightArrow, 0, 0);
        else if (key == KEY_LEFT && state)
                c->controller->event(c, leftArrow, 0, 0);
        else if (key == KEY_DOWN && state)
                c->controller->event(c, downArrow, 0, 0);
        else if (key == KEY_ENTER && state)
                c->controller->event(c, menuSelect, 0, 0);
        else if (key == KEY_SPACE && state)
                c->controller->event(c, menuSelect, 0, 0);
#endif
}

static void
keyboard_handle_modifiers(void *data, struct wl_keyboard *keyboard,
                          uint32_t serial, uint32_t mods_depressed,
                          uint32_t mods_latched, uint32_t mods_locked,
                          uint32_t group)
{
  fprintf(stderr, "MainWayland: keyboard_handle_modifiers\n");
}

static const struct wl_keyboard_listener keyboard_listener = {
        keyboard_handle_keymap,
        keyboard_handle_enter,
        keyboard_handle_leave,
        keyboard_handle_key,
        keyboard_handle_modifiers,
};

static void
seat_handle_capabilities(void *data, struct wl_seat *seat,
                         enum wl_seat_capability caps)
{
        struct display *d = data;

        if ((caps & WL_SEAT_CAPABILITY_POINTER) && !d->pointer) {
                d->pointer = wl_seat_get_pointer(seat);
                wl_pointer_add_listener(d->pointer, &pointer_listener, d);
        } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && d->pointer) {
                wl_pointer_destroy(d->pointer);
                d->pointer = NULL;
        }

        if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !d->keyboard) {
                d->keyboard = wl_seat_get_keyboard(seat);
                wl_keyboard_add_listener(d->keyboard, &keyboard_listener, d);
        } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && d->keyboard) {
                wl_keyboard_destroy(d->keyboard);
                d->keyboard = NULL;
        }
}

static const struct wl_seat_listener seat_listener = {
        seat_handle_capabilities,
};

static void
display_handle_global(struct wl_display *display, uint32_t id,
                      const char *interface, uint32_t version, void *data)
{
        struct display *d = data;

        if (strcmp(interface, "wl_compositor") == 0) {
                d->compositor =
                        wl_display_bind(display, id, &wl_compositor_interface);
        } else if (strcmp(interface, "wl_shell") == 0) {
                d->shell = wl_display_bind(display, id, &wl_shell_interface);
        } else if (strcmp(interface, "wl_seat") == 0) {
                d->seat = wl_display_bind(d->display, id, &wl_seat_interface);
                wl_seat_add_listener(d->seat, &seat_listener, d);
        }
}

static int
event_mask_update(uint32_t mask, void *data)
{
        struct display *d = data;

        d->mask = mask;

        return 0;
}

#ifdef SIMPLE_EGL
static void
signal_int(int signum)
{
        running = 0;
}
#endif

static void
usage(int error_code)
{
        fprintf(stderr, "MainWayland: Usage: simple-egl [OPTIONS]\n\n"
                "  -f\tRun in fullscreen mode\n"
                "  -o\tCreate an opaque surface\n"
                "  -h\tThis help text\n\n");

        exit(error_code);
}


int
main(int argc, char **argv)
{
#ifdef SIMPLE_EGL
        struct sigaction sigint;
#endif
        struct display display = { 0 };
        struct window  window  = { 0 };
        int i;

        window.display = &display;
        display.window = &window;
#ifdef SIMPLE_EGL
        window.window_size.width  = 250;
        window.window_size.height = 250;
#else
        window.window_size.width  = WIDTH;
        window.window_size.height = HEIGHT;
#endif

        for (i = 1; i < argc; i++) {
                if (strcmp("-f", argv[i]) == 0)
                        window.fullscreen = 1;
                else if (strcmp("-o", argv[i]) == 0)
                        window.opaque = 1;
                else if (strcmp("-h", argv[i]) == 0)
                        usage(EXIT_SUCCESS);
                else
                        usage(EXIT_FAILURE);
        }

        display.display = wl_display_connect(NULL);
        assert(display.display);

        wl_display_add_global_listener(display.display,
                                       display_handle_global, &display);

        wl_display_get_fd(display.display, event_mask_update, &display);
        wl_display_iterate(display.display, WL_DISPLAY_READABLE);

        if (window.fullscreen)
                window.opaque = 1;

        init_egl(&display, window.opaque);
        create_surface(&window);
#ifdef HAVE_GLES2
        init_gl(&window);
#endif

#ifdef SIMPLE_EGL
        sigint.sa_handler = signal_int;
        sigemptyset(&sigint.sa_mask);
        sigint.sa_flags = SA_RESETHAND;
        sigaction(SIGINT, &sigint, NULL);
#else
        uMfdInit(0, NULL, UMFD_CONTEXT_WAYLAND);
#endif

        while (running)
                wl_display_iterate(display.display, display.mask);

        fprintf(stderr, "simple-egl exiting\n");

        destroy_surface(&window);
        fini_egl(&display);

        if (display.shell)
                wl_shell_destroy(display.shell);

        if (display.compositor)
                wl_compositor_destroy(display.compositor);

        wl_display_flush(display.display);
        wl_display_disconnect(display.display);

        return 0;
}
</code>
</MainWayland.c>


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