C++ COGL_FRAMEBUFFER函数代码示例

static void
_cogl_winsys_onscreen_bind (CoglOnscreen *onscreen)
{
  CoglFramebuffer *fb = COGL_FRAMEBUFFER (onscreen);
  CoglContext *context = fb->context;
  CoglContextSdl2 *sdl_context = context->winsys;
  CoglDisplaySdl2 *sdl_display = context->display->winsys;
  CoglOnscreenSdl2 *sdl_onscreen = onscreen->winsys;

  if (sdl_context->current_window == sdl_onscreen->window)
    return;

  SDL_GL_MakeCurrent (sdl_onscreen->window, sdl_display->context);

  sdl_context->current_window = sdl_onscreen->window;

  /* It looks like SDL just directly calls a glXSwapInterval function
   * when this is called. This may be provided by either the EXT
   * extension, the SGI extension or the Mesa extension. The SGI
   * extension is per context so we can't just do this once when the
   * framebuffer is allocated. See the comments in the GLX winsys for
   * more info. */
  if (COGL_FLAGS_GET (context->winsys_features,
                      COGL_WINSYS_FEATURE_SWAP_REGION_THROTTLE))
    {
      CoglFramebuffer *fb = COGL_FRAMEBUFFER (onscreen);

      SDL_GL_SetSwapInterval (fb->config.swap_throttled ? 1 : 0);
    }
}

static void
handle_event (Data *data, SDL_Event *event)
{
  switch (event->type)
    {
    case SDL_VIDEOEXPOSE:
      data->redraw_queued = TRUE;
      break;

    case SDL_MOUSEMOTION:
      {
        int width =
          cogl_framebuffer_get_width (COGL_FRAMEBUFFER (data->fb));
        int height =
          cogl_framebuffer_get_height (COGL_FRAMEBUFFER (data->fb));

        data->center_x = event->motion.x * 2.0f / width - 1.0f;
        data->center_y = event->motion.y * 2.0f / height - 1.0f;

        data->redraw_queued = TRUE;
      }
      break;

    case SDL_QUIT:
      data->quit = TRUE;
      break;
    }
}

static void
_cogl_winsys_onscreen_deinit (CoglOnscreen *onscreen)
{
  CoglOnscreenSdl2 *sdl_onscreen = onscreen->winsys;

  if (sdl_onscreen->window != NULL)
    {
      CoglContext *context = COGL_FRAMEBUFFER (onscreen)->context;
      CoglContextSdl2 *sdl_context = context->winsys;

      if (sdl_context->current_window == sdl_onscreen->window)
        {
          CoglDisplaySdl2 *sdl_display = context->display->winsys;

          /* SDL explicitly unbinds the context when the currently
           * bound window is destroyed. Cogl always needs a context
           * bound so that for example it can create texture resources
           * at any time even without flushing a framebuffer.
           * Therefore we'll bind the dummy window. */
          SDL_GL_MakeCurrent (sdl_display->dummy_window,
                              sdl_display->context);
          sdl_context->current_window = sdl_display->dummy_window;
        }

      SDL_DestroyWindow (sdl_onscreen->window);
      sdl_onscreen->window = NULL;
    }

  g_slice_free (CoglOnscreenSdl2, sdl_onscreen);
  onscreen->winsys = NULL;
}

static CoglFramebuffer *
clutter_stage_win32_get_active_framebuffer (ClutterStageWindow *stage_window)
{
  ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);

  return COGL_FRAMEBUFFER (stage_win32->onscreen);
}

static CoglBool
_cogl_winsys_egl_onscreen_init (CoglOnscreen *onscreen,
                                EGLConfig egl_config,
                                CoglError **error)
{
  CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
  CoglContext *context = framebuffer->context;
  CoglDisplay *display = context->display;
  CoglDisplayEGL *egl_display = display->winsys;
  CoglDisplayGDL *gdl_display = egl_display->platform;
  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;

  if (gdl_display->have_onscreen)
    {
      _cogl_set_error (error, COGL_WINSYS_ERROR,
                   COGL_WINSYS_ERROR_CREATE_ONSCREEN,
                   "EGL platform only supports a single onscreen window");
      return FALSE;
    }

  egl_onscreen->egl_surface = egl_display->egl_surface;

  _cogl_framebuffer_winsys_update_size (framebuffer,
                                        gdl_display->egl_surface_width,
                                        gdl_display->egl_surface_height);
  gdl_display->have_onscreen = TRUE;

  return TRUE;
}

void
test_backface_culling (void)
{
  TestState state;
  CoglTexture *tex;

  state.width = cogl_framebuffer_get_width (test_fb);
  state.height = cogl_framebuffer_get_height (test_fb);

  state.offscreen = NULL;

  state.texture = make_texture ();

  tex = cogl_texture_new_with_size (state.width, state.height,
                                    COGL_TEXTURE_NO_SLICING,
                                    COGL_PIXEL_FORMAT_ANY); /* internal fmt */
  state.offscreen = COGL_FRAMEBUFFER (cogl_offscreen_new_to_texture (tex));
  state.offscreen_tex = tex;

  paint (&state);

  cogl_object_unref (state.offscreen);
  cogl_object_unref (state.offscreen_tex);
  cogl_object_unref (state.texture);

  if (cogl_test_verbose ())
    g_print ("OK\n");
}

void
test_color_mask (void)
{
  TestState state;
  int i;

  state.width = cogl_framebuffer_get_width (test_fb);
  state.height = cogl_framebuffer_get_height (test_fb);

  for (i = 0; i < NUM_FBOS; i++)
    {
      state.tex[i] = test_utils_texture_new_with_size (test_ctx, 128, 128,
                                                 TEST_UTILS_TEXTURE_NO_ATLAS,
                                                 COGL_PIXEL_FORMAT_RGB_888);


      state.fbo[i] = COGL_FRAMEBUFFER (
        cogl_offscreen_new_to_texture (state.tex[i]));

      /* Clear the texture color bits */
      cogl_framebuffer_clear4f (state.fbo[i],
                                COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);

      cogl_framebuffer_set_color_mask (state.fbo[i],
                                       i == 0 ? COGL_COLOR_MASK_RED :
                                       i == 1 ? COGL_COLOR_MASK_GREEN :
                                       COGL_COLOR_MASK_BLUE);
    }

  paint (&state);

  if (cogl_test_verbose ())
    g_print ("OK\n");
}

static void
_cogl_winsys_onscreen_deinit (CoglOnscreen *onscreen)
{
  CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
  CoglContext *context = framebuffer->context;
  CoglRenderer *renderer = context->display->renderer;
  CoglRendererEGL *egl_renderer = renderer->winsys;
  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;

  /* If we never successfully allocated then there's nothing to do */
  if (egl_onscreen == NULL)
    return;
  if (egl_onscreen->egl_surface != EGL_NO_SURFACE)
    {
      if (eglDestroySurface (egl_renderer->edpy, egl_onscreen->egl_surface)
          == EGL_FALSE)
        g_warning ("Failed to destroy EGL surface");
      egl_onscreen->egl_surface = EGL_NO_SURFACE;
    }

  if (egl_renderer->platform_vtable->onscreen_deinit)
    egl_renderer->platform_vtable->onscreen_deinit (onscreen);

  g_slice_free (CoglOnscreenEGL, onscreen->winsys);
  onscreen->winsys = NULL;
}

static void
_cogl_winsys_onscreen_bind (CoglOnscreen *onscreen)
{
  CoglFramebuffer *fb = COGL_FRAMEBUFFER (onscreen);
  CoglContext *context = fb->context;
  CoglDisplayEGL *egl_display = context->display->winsys;
  CoglRenderer *renderer = context->display->renderer;
  CoglRendererEGL *egl_renderer = renderer->winsys;
  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
  CoglContextEGL *egl_context = context->winsys;

  if (egl_context->current_surface == egl_onscreen->egl_surface)
    return;

  eglMakeCurrent (egl_renderer->edpy,
                  egl_onscreen->egl_surface,
                  egl_onscreen->egl_surface,
                  egl_display->egl_context);
  egl_context->current_surface = egl_onscreen->egl_surface;

  if (fb->config.swap_throttled)
    eglSwapInterval (egl_renderer->edpy, 1);
  else
    eglSwapInterval (egl_renderer->edpy, 0);
}

static void
flush_pending_resize (CoglOnscreen *onscreen)
{
  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
  CoglOnscreenWayland *wayland_onscreen = egl_onscreen->platform;

  if (wayland_onscreen->has_pending)
    {
      wl_egl_window_resize (wayland_onscreen->wayland_egl_native_window,
                            wayland_onscreen->pending_width,
                            wayland_onscreen->pending_height,
                            wayland_onscreen->pending_dx,
                            wayland_onscreen->pending_dy);

      _cogl_framebuffer_winsys_update_size (COGL_FRAMEBUFFER (onscreen),
                                            wayland_onscreen->pending_width,
                                            wayland_onscreen->pending_height);

      _cogl_onscreen_queue_full_dirty (onscreen);

      wayland_onscreen->pending_dx = 0;
      wayland_onscreen->pending_dy = 0;
      wayland_onscreen->has_pending = FALSE;
    }
}

static CoglBool
bind_onscreen_with_context (CoglOnscreen *onscreen,
                            EGLContext egl_context)
{
  CoglFramebuffer *fb = COGL_FRAMEBUFFER (onscreen);
  CoglContext *context = fb->context;
  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;

  CoglBool status = _cogl_winsys_egl_make_current (context->display,
                                                   egl_onscreen->egl_surface,
                                                   egl_onscreen->egl_surface,
                                                   egl_context);
  if (status)
    {
      CoglRenderer *renderer = context->display->renderer;
      CoglRendererEGL *egl_renderer = renderer->winsys;

      if (fb->config.swap_throttled)
        eglSwapInterval (egl_renderer->edpy, 1);
      else
        eglSwapInterval (egl_renderer->edpy, 0);
    }

  return status;
}

void
cogl_wayland_onscreen_resize (CoglOnscreen *onscreen,
                              int           width,
                              int           height,
                              int           offset_x,
                              int           offset_y)
{
  CoglFramebuffer *fb;

  fb = COGL_FRAMEBUFFER (onscreen);
  if (fb->allocated)
    {
      CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
      CoglOnscreenWayland *wayland_onscreen = egl_onscreen->platform;

      if (cogl_framebuffer_get_width (fb) != width ||
          cogl_framebuffer_get_height (fb) != height ||
          offset_x ||
          offset_y)
        {
          wayland_onscreen->pending_width = width;
          wayland_onscreen->pending_height = height;
          wayland_onscreen->pending_dx += offset_x;
          wayland_onscreen->pending_dy += offset_y;
          wayland_onscreen->has_pending = TRUE;
        }
    }
  else
    _cogl_framebuffer_winsys_update_size (fb, width, height);
}

static CoglBool
_cogl_winsys_egl_onscreen_init (CoglOnscreen *onscreen,
                                EGLConfig egl_config,
                                CoglError **error)
{
  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
  CoglOnscreenWayland *wayland_onscreen;
  CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
  CoglContext *context = framebuffer->context;
  CoglRenderer *renderer = context->display->renderer;
  CoglRendererEGL *egl_renderer = renderer->winsys;
  CoglRendererWayland *wayland_renderer = egl_renderer->platform;

  wayland_onscreen = g_slice_new0 (CoglOnscreenWayland);
  egl_onscreen->platform = wayland_onscreen;

  _cogl_list_init (&wayland_onscreen->frame_callbacks);

  if (onscreen->foreign_surface)
    wayland_onscreen->wayland_surface = onscreen->foreign_surface;
  else
    wayland_onscreen->wayland_surface =
      wl_compositor_create_surface (wayland_renderer->wayland_compositor);

  if (!wayland_onscreen->wayland_surface)
    {
      _cogl_set_error (error, COGL_WINSYS_ERROR,
                   COGL_WINSYS_ERROR_CREATE_ONSCREEN,
                   "Error while creating wayland surface for CoglOnscreen");
      return FALSE;
    }

  wayland_onscreen->wayland_egl_native_window =
    wl_egl_window_create (wayland_onscreen->wayland_surface,
                          cogl_framebuffer_get_width (framebuffer),
                          cogl_framebuffer_get_height (framebuffer));
  if (!wayland_onscreen->wayland_egl_native_window)
    {
      _cogl_set_error (error, COGL_WINSYS_ERROR,
                   COGL_WINSYS_ERROR_CREATE_ONSCREEN,
                   "Error while creating wayland egl native window "
                   "for CoglOnscreen");
      return FALSE;
    }

  egl_onscreen->egl_surface =
    eglCreateWindowSurface (egl_renderer->edpy,
                            egl_config,
                            (EGLNativeWindowType)
                            wayland_onscreen->wayland_egl_native_window,
                            NULL);

  if (!onscreen->foreign_surface)
    wayland_onscreen->wayland_shell_surface =
      wl_shell_get_shell_surface (wayland_renderer->wayland_shell,
                                  wayland_onscreen->wayland_surface);

  return TRUE;
}

void
cogl_android_onscreen_update_size (CoglOnscreen *onscreen,
                                   int width,
                                   int height)
{
  CoglFramebuffer *fb = COGL_FRAMEBUFFER (onscreen);
  _cogl_framebuffer_winsys_update_size (fb, width, height);
}

static CoglBool
_cogl_winsys_onscreen_init (CoglOnscreen *onscreen,
                            CoglError **error)
{
  CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
  CoglContext *context = framebuffer->context;
  CoglDisplay *display = context->display;
  CoglDisplayEGL *egl_display = display->winsys;
  CoglDisplayKMS *kms_display = egl_display->platform;
  CoglRenderer *renderer = display->renderer;
  CoglRendererEGL *egl_renderer = renderer->winsys;
  CoglRendererKMS *kms_renderer = egl_renderer->platform;
  CoglOnscreenEGL *egl_onscreen;
  CoglOnscreenKMS *kms_onscreen;

  _COGL_RETURN_VAL_IF_FAIL (egl_display->egl_context, FALSE);

  onscreen->winsys = g_slice_new0 (CoglOnscreenEGL);
  egl_onscreen = onscreen->winsys;

  kms_onscreen = g_slice_new0 (CoglOnscreenKMS);
  egl_onscreen->platform = kms_onscreen;

  kms_onscreen->surface =
    gbm_surface_create (kms_renderer->gbm,
                        kms_display->width,
                        kms_display->height,
                        GBM_BO_FORMAT_XRGB8888,
                        GBM_BO_USE_SCANOUT |
                        GBM_BO_USE_RENDERING);

  if (!kms_onscreen->surface)
    {
      _cogl_set_error (error, COGL_WINSYS_ERROR,
                   COGL_WINSYS_ERROR_CREATE_ONSCREEN,
                   "Failed to allocate surface");
      return FALSE;
    }

  egl_onscreen->egl_surface =
    eglCreateWindowSurface (egl_renderer->edpy,
                            egl_display->egl_config,
                            (NativeWindowType) kms_onscreen->surface,
                            NULL);
  if (egl_onscreen->egl_surface == EGL_NO_SURFACE)
    {
      _cogl_set_error (error, COGL_WINSYS_ERROR,
                   COGL_WINSYS_ERROR_CREATE_ONSCREEN,
                   "Failed to allocate surface");
      return FALSE;
    }

  _cogl_framebuffer_winsys_update_size (framebuffer,
                                        kms_display->width,
                                        kms_display->height);

  return TRUE;
}