Attachment 138775 Details for Bug 105995 – sample code

sample code

egl_wl.c (text/plain), 7.48 KB, created by Errong on 2018-04-12 06:20:12 UTC

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Creator: Errong

Created: 2018-04-12 06:20:12 UTC

Size: 7.48 KB

patch

obsolete

>#include <stdlib.h>
>#include <stdint.h>
>#include <stdio.h>
>#include <string.h>
>
>#include <wayland-client.h>
>#include <wayland-server.h>
>#include <wayland-client-protocol.h>
>#include <wayland-egl.h> // Wayland EGL MUST be included before EGL headers
>
>#include <EGL/egl.h>
>#include <EGL/eglplatform.h>
>#include <GLES2/gl2.h>
>
>struct _escontext
>{
>  /// Native System informations
>  EGLNativeDisplayType native_display;
>  EGLNativeWindowType native_window;
>  uint16_t window_width, window_height;
>  /// EGL display
>  EGLDisplay  display;
>  /// EGL context
>  EGLContext  context;
>  /// EGL surface
>  EGLSurface  surface;
>
>};
>
>void CreateNativeWindow(char* title, int width, int height);
>EGLBoolean CreateEGLContext();
>EGLBoolean CreateWindowWithEGLContext(char *title, int width, int height);
>void RefreshWindow();
>
>struct wl_compositor *compositor = NULL;
>struct wl_surface *surface;
>struct wl_egl_window *egl_window;
>struct wl_region *region;
>struct wl_shell *shell;
>struct wl_shell_surface *shell_surface;
>
>struct _escontext ESContext = {
>  .native_display = NULL,
>  .window_width = 0,
>  .window_height = 0,
>  .native_window  = 0,
>  .display = NULL,
>  .context = NULL,
>  .surface = NULL
>};
>
>#define TRUE 1
>#define FALSE 0
>
>#define WINDOW_WIDTH 1920
>#define WINDOW_HEIGHT 1080
>
>void CreateNativeWindow(char *title, int width, int height) {
>
>  region = wl_compositor_create_region(compositor);
>
>  wl_region_add(region, 0, 0, width, height);
>  wl_surface_set_opaque_region(surface, region);
>
>  struct wl_egl_window *egl_window =
>    wl_egl_window_create(surface, width, height);
>
>  if (egl_window == EGL_NO_SURFACE) {
>    printf("No window !?\n");
>    exit(1);
>  }
>  else printf("Window created !\n");
>  ESContext.window_width = width;
>  ESContext.window_height = height;
>  ESContext.native_window = egl_window;
>
>}
>EGLBoolean CreateEGLContext ()
>{
>   EGLint numConfigs;
>   EGLint majorVersion;
>   EGLint minorVersion;
>   EGLContext context;
>   EGLSurface surface;
>   EGLConfig config;
>
>  EGLint attribute_list[] = {EGL_SURFACE_TYPE,    // this must be first
>                             EGL_WINDOW_BIT | EGL_PBUFFER_BIT
>                             ,
>                             EGL_RED_SIZE,
>                             8,
>                             EGL_GREEN_SIZE,
>                             8,
>                             EGL_BLUE_SIZE,
>                             8,
>                             EGL_ALPHA_SIZE,
>                             8,
>                             EGL_RENDERABLE_TYPE,
>                             EGL_OPENGL_ES2_BIT,
>                             EGL_NONE};
>
>   EGLint contextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE, EGL_NONE };
>   EGLDisplay display = eglGetDisplay( ESContext.native_display );
>   if ( display == EGL_NO_DISPLAY )
>   {
>      printf("No EGL Display...\n");
>      return EGL_FALSE;
>   }
>
>   // Initialize EGL
>   if ( !eglInitialize(display, &majorVersion, &minorVersion) )
>   {
>      printf("No Initialisation... %d \n", eglGetError());
>      return EGL_FALSE;
>   }
>
>   // Get configs
>   if ( (eglGetConfigs(display, NULL, 0, &numConfigs) != EGL_TRUE) || (numConfigs == 0))
>   {
>      printf("No get configuration...\n");
>      return EGL_FALSE;
>   }
>
>   // Choose config
>   if ( (eglChooseConfig(display, attribute_list, &config, 1, &numConfigs) != EGL_TRUE) || (numConfigs != 1))
>   {
>      printf("No choose configuration...\n");
>      return EGL_FALSE;
>   }
>
>   // Create a surface
>   surface = eglCreateWindowSurface(display, config, ESContext.native_window, NULL);
>   if ( surface == EGL_NO_SURFACE )
>   {
>      printf("No surface...\n");
>      return EGL_FALSE;
>   }
>
>   // Create a GL context
>   context = eglCreateContext(display, config, EGL_NO_CONTEXT, contextAttribs );
>   if ( context == EGL_NO_CONTEXT )
>   {
>      printf("No context...\n");
>      return EGL_FALSE;
>   }
>
>   // Make the context current
>   if ( !eglMakeCurrent(display, surface, surface, context) )
>   {
>      printf("Could not make the current window current !\n");
>      return EGL_FALSE;
>   }
>
>   printf("Context created \n");
>   ESContext.display = display;
>   ESContext.surface = surface;
>   ESContext.context = context;
>   return EGL_TRUE;
>}
>
>void shell_surface_ping
>(void *data, struct wl_shell_surface *shell_surface, uint32_t serial) {
>  wl_shell_surface_pong(shell_surface, serial);
>}
>
>void shell_surface_configure
>(void *data, struct wl_shell_surface *shell_surface, uint32_t edges,
> int32_t width, int32_t height) {
>  struct window *window = data;
>  wl_egl_window_resize(ESContext.native_window, width, height, 0, 0);
>}
>
>void shell_surface_popup_done(void *data, struct wl_shell_surface *shell_surface) {
>}
>
>static struct wl_shell_surface_listener shell_surface_listener = {
>  &shell_surface_ping,
>  &shell_surface_configure,
>  &shell_surface_popup_done
>};
>
>EGLBoolean CreateWindowWithEGLContext(char *title, int width, int height) {
>  CreateNativeWindow(title, width, height);
>  return CreateEGLContext();
>}
>
>void draw() {
>  glClearColor(0.7, 0.1, 0.5, 0.2);
>  glClear(GL_COLOR_BUFFER_BIT);
>}
>
>unsigned long last_click = 0;
>void RefreshWindow() { eglSwapBuffers(ESContext.display, ESContext.surface); }
>
>static void global_registry_handler
>(void *data, struct wl_registry *registry, uint32_t id,
> const char *interface, uint32_t version) {
>  printf("Got a registry event for %s id %d\n", interface, id);
>  if (strcmp(interface, "wl_compositor") == 0)
>    compositor =
>      wl_registry_bind(registry, id, &wl_compositor_interface, 1);
>
>  else if (strcmp(interface, "wl_shell") == 0)
>    shell = wl_registry_bind(registry, id, &wl_shell_interface, 1);
>}
>
>static void global_registry_remover
>(void *data, struct wl_registry *registry, uint32_t id) {
>  printf("Got a registry losing event for %d\n", id);
>}
>
>const struct wl_registry_listener listener = {
>  global_registry_handler,
>  global_registry_remover
>};
>
>static void
>get_server_references() {
>
>  struct wl_display * display = wl_display_connect(NULL);
>  if (display == NULL) {
>    printf("Can't connect to wayland display !?\n");
>    exit(1);
>  }
>  printf("Got a display !");
>
>  struct wl_registry *wl_registry =
>    wl_display_get_registry(display);
>  wl_registry_add_listener(wl_registry, &listener, NULL);
>
>  // This call the attached listener global_registry_handler
>  wl_display_dispatch(display);
>  wl_display_roundtrip(display);
>
>  // If at this point, global_registry_handler didn't set the 
>  // compositor, nor the shell, bailout !
>  if (compositor == NULL || shell == NULL) {
>    printf("No compositor !? No Shell !! There's NOTHING in here !\n");
>    exit(1);   
>  }
>  else {
>    printf("Okay, we got a compositor and a shell... That's something !\n");
>    ESContext.native_display = display;
>  }
>}
>
>void destroy_window() {
>  eglDestroySurface(ESContext.display, ESContext.surface);
>  wl_egl_window_destroy(ESContext.native_window);
>  wl_shell_surface_destroy(shell_surface);
>  wl_surface_destroy(surface);
>  eglDestroyContext(ESContext.display, ESContext.context);
>}
>
>int main() {
>  get_server_references();
>
>  surface = wl_compositor_create_surface(compositor);
>  if (surface == NULL) {
>    printf("No Compositor surface ! Yay....\n");
>    exit(1);
>  }
>  else printf("Got a compositor surface !\n");
>
>  shell_surface = wl_shell_get_shell_surface(shell, surface);
>  wl_shell_surface_set_toplevel(shell_surface);
>
>  if (!CreateWindowWithEGLContext("Nya", 1280, 720)) {
>    printf("Fail create EGL Context\n");
>    exit(0);
>  }
>
>  while (1) {
>    wl_display_dispatch_pending(ESContext.native_display);
>    draw();
>    RefreshWindow();
>  }
>
>  wl_display_disconnect(ESContext.native_display);
>  printf("Display disconnected !\n");
>
>  exit(0);
>}

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Attachments on bug 105995: 138774 | 138775

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