C++ (Cpp) cogl_framebuffer_read_pixels_into_bitmap Exemples

Exemple #1

Fichier : cogl.c Projet : collinss/muffin

void
cogl_read_pixels (int x,
                  int y,
                  int width,
                  int height,
                  CoglReadPixelsFlags source,
                  CoglPixelFormat format,
                  uint8_t *pixels)
{
  int bpp = _cogl_pixel_format_get_bytes_per_pixel (format);
  CoglBitmap *bitmap;

  _COGL_GET_CONTEXT (ctx, NO_RETVAL);

  bitmap = cogl_bitmap_new_for_data (ctx,
                                     width, height,
                                     format,
                                     bpp * width, /* rowstride */
                                     pixels);
  cogl_framebuffer_read_pixels_into_bitmap (_cogl_get_read_framebuffer (),
                                            x, y,
                                            source,
                                            bitmap);
  cogl_object_unref (bitmap);
}

Exemple #2

Fichier : shell-screenshot.c Projet : sigurdga/gnome-shell

static void
do_grab_screenshot (_screenshot_data *screenshot_data,
                    int               x,
                    int               y,
                    int               width,
                    int               height)
{
  CoglBitmap *bitmap;
  ClutterBackend *backend;
  CoglContext *context;
  int stride;
  guchar *data;

  backend = clutter_get_default_backend ();
  context = clutter_backend_get_cogl_context (backend);

  screenshot_data->image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
                                                       width, height);


  data = cairo_image_surface_get_data (screenshot_data->image);
  stride = cairo_image_surface_get_stride (screenshot_data->image);

  bitmap = cogl_bitmap_new_for_data (context,
                                     width,
                                     height,
                                     CLUTTER_CAIRO_FORMAT_ARGB32,
                                     stride,
                                     data);
  cogl_framebuffer_read_pixels_into_bitmap (cogl_get_draw_framebuffer (),
                                            x, y,
                                            COGL_READ_PIXELS_COLOR_BUFFER,
                                            bitmap);

  cairo_surface_mark_dirty (screenshot_data->image);
  cogl_object_unref (bitmap);
}