Class: Cairo::SolidPattern

Inherits:
Pattern
  • Object
show all
Defined in:
ext/cairo/rb_cairo_pattern.c

Instance Method Summary collapse

Methods inherited from Pattern

#extend, #filter, gradient_supported?, linear_supported?, #matrix, mesh_supported?, radial_supported?, raster_source_supported?, #set_extend, #set_filter, #set_matrix, solid_supported?, supported?, surface_supported?

Constructor Details

#initialize ⇒ Object 



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# File 'ext/cairo/rb_cairo_pattern.c', line 189

static VALUE
cr_solid_pattern_initialize (int argc, VALUE *argv, VALUE self)
{
  VALUE red, green, blue, alpha;
  int n;
  cairo_pattern_t *pattern;

  n = rb_scan_args (argc, argv, "13", &red, &green, &blue, &alpha);

  if (n == 1)
    {
      VALUE color = red;

      color = cr_color_parse (color);
      if (rb_cairo__is_kind_of (color, rb_cCairo_Color_Base))
        red = rb_funcall (rb_funcall (color, id_to_rgb, 0), id_to_a, 0);
    }

  if (n == 1 && rb_cairo__is_kind_of (red, rb_cArray) &&
      (RARRAY_LEN (red) == 3 || RARRAY_LEN (red) == 4))
    {
      VALUE ary = red;
      n = RARRAY_LEN (ary);

      red = rb_ary_entry (ary, 0);
      green = rb_ary_entry (ary, 1);
      blue = rb_ary_entry (ary, 2);
      alpha = rb_ary_entry (ary, 3);
    }

  if (n == 3)
    {
      pattern = cairo_pattern_create_rgb (NUM2DBL (red),
                                          NUM2DBL (green),
                                          NUM2DBL (blue));
    }
  else if (n == 4)
    {
      pattern = cairo_pattern_create_rgba (NUM2DBL (red),
                                           NUM2DBL (green),
                                           NUM2DBL (blue),
                                           NUM2DBL (alpha));
    }
  else
    {
      VALUE inspected;

      inspected = rb_funcall (argc == 1 ? red : rb_ary_new4 (argc, argv),
                              id_inspect, 0);
      rb_raise (rb_eArgError,
                "invalid argument: %s (expect "
                "(color_name), "
                "(color_hex_triplet), "
                "(Cairo::Color::RGB), "
                "(Cairo::Color::CMYK), "
                "(Cairo::Color::HSV), "
                "(red, green, blue), "
                "([red, green, blue]), "
                "(red, green, blue, alpha) or "
                "([red, green, blue, alpha])"
                ")",
                RVAL2CSTR (inspected));
    }

  cr_pattern_check_status (pattern);
  DATA_PTR (self) = pattern;
  return Qnil;
}

Instance Method Details

#color ⇒ Object 



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# File 'ext/cairo/rb_cairo_pattern.c', line 421

static VALUE
cr_solid_pattern_get_color (VALUE self)
{
  return cr_color_parse (cr_solid_pattern_get_rgba (self));
}

#rgba ⇒ Object 



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# File 'ext/cairo/rb_cairo_pattern.c', line 409

static VALUE
cr_solid_pattern_get_rgba (VALUE self)
{
  double red, green, blue, alpha;

  rb_cairo_check_status (cairo_pattern_get_rgba (_SELF (self),
                                                 &red, &green, &blue, &alpha));
  return rb_ary_new3 (4,
                      rb_float_new (red), rb_float_new (green),
                      rb_float_new (blue), rb_float_new (alpha));
}