class Cairo::RasterSourcePattern - cairo-1.16.4 Documentation

# class Cairo::RasterSourcePattern

### Public Class Methods

new(*args) click to toggle source

    static VALUE
    cr_raster_source_pattern_initialize (int argc, VALUE *argv, VALUE self)
    {
      cairo_pattern_t *pattern;
      cairo_content_t content;
      int width, height;
      VALUE arg1, arg2, arg3;

      rb_scan_args (argc, argv, "21", &arg1, &arg2, &arg3);

      if (argc == 2)
        {
          content = CAIRO_CONTENT_COLOR_ALPHA;
          width = NUM2INT (arg1);
          height = NUM2INT (arg2);
        }
      else
        {
          content = RVAL2CRCONTENT (arg1);
          width = NUM2INT (arg2);
          height = NUM2INT (arg3);
        }

      pattern = cairo_pattern_create_raster_source (RVAL2POINTER (self),
                                                    content, width, height);
      cr_pattern_check_status (pattern);

      DATA_PTR (self) = pattern;
      rb_iv_set (self, "@acquire", Qnil);
      rb_iv_set (self, "@release", Qnil);
      rb_iv_set (self, "@snapshot", Qnil);
      rb_iv_set (self, "@copy", Qnil);
      rb_iv_set (self, "@finish", Qnil);

      cairo_raster_source_pattern_set_acquire (pattern,
                                               cr_raster_source_acquire_callback,
                                               cr_raster_source_release_callback);
      cairo_raster_source_pattern_set_snapshot (pattern,
                                                cr_raster_source_snapshot_callback);
      cairo_raster_source_pattern_set_copy (pattern,
                                            cr_raster_source_copy_callback);
      cairo_raster_source_pattern_set_finish (pattern,
                                              cr_raster_source_finish_callback);

      return Qnil;
    }

### Public Instance Methods

acquire() click to toggle source

    static VALUE
    cr_raster_source_pattern_acquire (VALUE self)
    {
      if (!rb_block_given_p ())
        {
          VALUE inspected;

          inspected = rb_funcall (self, id_inspect, 0);
          rb_raise (rb_eArgError, "acquire block is missing: %s",
                    RVAL2CSTR (inspected));
        }

      rb_iv_set (self, "@acquire", rb_block_proc ());

      return self;
    }

copy() click to toggle source

    static VALUE
    cr_raster_source_pattern_copy (VALUE self)
    {
      if (!rb_block_given_p ())
        {
          VALUE inspected;

          inspected = rb_funcall (self, id_inspect, 0);
          rb_raise (rb_eArgError, "copy block is missing: %s",
                    RVAL2CSTR (inspected));
        }

      rb_iv_set (self, "@copy", rb_block_proc ());

      return self;
    }

finish() click to toggle source

    static VALUE
    cr_raster_source_pattern_finish (VALUE self)
    {
      if (!rb_block_given_p ())
        {
          VALUE inspected;

          inspected = rb_funcall (self, id_inspect, 0);
          rb_raise (rb_eArgError, "finish block is missing: %s",
                    RVAL2CSTR (inspected));
        }

      rb_iv_set (self, "@finish", rb_block_proc ());

      return self;
    }

release() click to toggle source

    static VALUE
    cr_raster_source_pattern_release (VALUE self)
    {
      if (!rb_block_given_p ())
        {
          VALUE inspected;

          inspected = rb_funcall (self, id_inspect, 0);
          rb_raise (rb_eArgError, "release block is missing: %s",
                    RVAL2CSTR (inspected));
        }

      rb_iv_set (self, "@release", rb_block_proc ());

      return self;
    }

snapshot() click to toggle source

    static VALUE
    cr_raster_source_pattern_snapshot (VALUE self)
    {
      if (!rb_block_given_p ())
        {
          VALUE inspected;

          inspected = rb_funcall (self, id_inspect, 0);
          rb_raise (rb_eArgError, "snapshot block is missing: %s",
                    RVAL2CSTR (inspected));
        }

      rb_iv_set (self, "@snapshot", rb_block_proc ());

      return self;
    }