class Cairo::GLSurface - cairo-1.12.9 Documentation

# class Cairo::GLSurface

GL surface

### Public Class Methods

new(p1) click to toggle source

GL surface functions

    static VALUE
    cr_gl_surface_initialize (int argc, VALUE *argv, VALUE self)
    {
      cairo_surface_t *surface;
      cairo_device_t *device;
      int width, height;
      cairo_content_t content = CAIRO_CONTENT_COLOR_ALPHA;
      VALUE rb_device, rb_width, rb_height, rb_content;

      rb_scan_args (argc, argv, "31",
                    &rb_device, &rb_width, &rb_height, &rb_content);

      device = RVAL2CRDEVICE (rb_device);
      width = NUM2INT (rb_width);
      height = NUM2INT (rb_height);
      switch (TYPE (rb_content))
        {
        case T_NIL:
          break;
        case T_STRING:
        case T_SYMBOL:
        case T_FIXNUM:
          content = RVAL2CRCONTENT (rb_content);
          break;
        default:
          rb_raise (rb_eArgError,
                    "invalid argument (expect "
                    "(device, width, height) or "
                    "(device, width, height, content)): %s",
                    rb_cairo__inspect (rb_ary_new4 (argc, argv)));
          break;
        }

      surface = cairo_gl_surface_create (device, content, width, height);

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

### Public Instance Methods

height() click to toggle source

    static VALUE
    cr_gl_surface_get_height (VALUE self)
    {
      return INT2NUM (cairo_gl_surface_get_height (_SELF));
    }

set_size(p1, p2) click to toggle source

    static VALUE
    cr_gl_surface_set_size (VALUE self, VALUE width, VALUE height)
    {
      cairo_surface_t *surface = NULL;

      surface = _SELF;
      cairo_gl_surface_set_size (surface, NUM2INT (width), NUM2INT (height));
      cr_surface_check_status (surface);
      return Qnil;
    }

swap_buffers() click to toggle source

    static VALUE
    cr_gl_surface_swap_buffers (VALUE self)
    {
      cairo_surface_t *surface = NULL;

      surface = _SELF;
      cairo_gl_surface_swapbuffers (surface);
      cr_surface_check_status (surface);
      return Qnil;
    }

width() click to toggle source

    static VALUE
    cr_gl_surface_get_width (VALUE self)
    {
      return INT2NUM (cairo_gl_surface_get_width (_SELF));
    }