Class: Cairo::Win32Surface

Inherits:

Surface

• Object
• Surface
• Cairo::Win32Surface

Defined in:

ext/cairo/rb_cairo_surface.c

Instance Method Summary

• #hdc ⇒ Object
• #image ⇒ Object
• #initialize ⇒ Object constructor

Methods inherited from Surface

#clone, #content, #copy_page, #create_similar, #destroy, #device_offset, #dup, #fallback_resolution, #finish, #flush, #font_options, #mark_dirty, #set_device_offset, #set_fallback_resolution, #show_page, #write_to_png

Constructor Details

#initialize ⇒ Object

# File 'ext/cairo/rb_cairo_surface.c', line 937

static VALUE
cr_win32_surface_initialize (int argc, VALUE *argv, VALUE self)
{
  cairo_surface_t *surface = NULL;
  VALUE arg1, arg2, arg3, arg4;
  VALUE hdc, format, width, height;

  rb_scan_args (argc, argv, "13", &arg1, &arg2, &arg3, &arg4);

  switch (argc)
    {
    case 1:
      hdc = arg1;
      surface = cairo_win32_surface_create (NUM2PTR (hdc));
      break;
    case 2:
      width = arg1;
      height = arg2;
      surface = cairo_win32_surface_create_with_dib (CAIRO_FORMAT_ARGB32,
                                                     NUM2INT (width),
                                                     NUM2INT (height));
      break;
    case 3:
      if (NIL_P (arg1) ||
          (rb_cairo__is_kind_of (arg1, rb_cNumeric) &&
           NUM2INT (arg1) != CAIRO_FORMAT_RGB24))
        {
#  if CAIRO_CHECK_VERSION(1, 4, 0)
          HDC win32_hdc;
          hdc = arg1;
          width = arg2;
          height = arg3;
          win32_hdc = NIL_P (hdc) ? NULL : NUM2PTR (hdc);
          surface = cairo_win32_surface_create_with_ddb (win32_hdc,
                                                         CAIRO_FORMAT_RGB24,
                                                         NUM2INT (width),
                                                         NUM2INT (height));
#  else
          rb_raise (rb_eArgError,
                    "Cairo::Win32Surface.new(hdc, width, height) "
                    "is available since cairo >= 1.4.0");
#  endif
        }
      else
        {
          format = arg1;
          width = arg2;
          height = arg3;
          surface = cairo_win32_surface_create_with_dib (RVAL2CRFORMAT (format),
                                                         NUM2INT (width),
                                                         NUM2INT (height));
        }
      break;
    case 4:
      {
#  if CAIRO_CHECK_VERSION(1, 4, 0)
        HDC win32_hdc;
        hdc = arg1;
        format = arg2;
        width = arg3;
        height = arg4;
        win32_hdc = NIL_P (hdc) ? NULL : (HDC) NUM2UINT (hdc);
        surface = cairo_win32_surface_create_with_ddb (win32_hdc,
                                                       RVAL2CRFORMAT (format),
                                                       NUM2INT (width),
                                                       NUM2INT (height));
#  else
        rb_raise (rb_eArgError,
                  "Cairo::Win32Surface.new(hdc, format, width, height) "
                  "is available since cairo >= 1.4.0");
#  endif
      }
      break;
    }

  if (!surface)
    rb_cairo_check_status (CAIRO_STATUS_INVALID_FORMAT);
  cr_surface_check_status (surface);
  DATA_PTR (self) = surface;
  if (rb_block_given_p ())
    yield_and_finish (self);
  return Qnil;
}

Instance Method Details

#hdc ⇒ Object

# File 'ext/cairo/rb_cairo_surface.c', line 1036

static VALUE
cr_win32_surface_get_hdc (VALUE self)
{
  HDC hdc;

  hdc = cairo_win32_surface_get_dc (_SELF);
  if (!hdc)
    return Qnil;
  else
    return PTR2NUM (hdc);
}

#image ⇒ Object

# File 'ext/cairo/rb_cairo_surface.c', line 1049

static VALUE
cr_win32_surface_get_image (VALUE self)
{
  cairo_surface_t *surface;

  surface = cairo_win32_surface_get_image (_SELF);
  if (!surface)
    return Qnil;
  cr_surface_check_status (surface);
  return CRSURFACE2RVAL (surface);
}