Class: Cairo::GradientPattern
- Defined in:
- ext/cairo/rb_cairo_pattern.c
Direct Known Subclasses
Instance Method Summary collapse
-
#add_color_stop ⇒ Object
(also: #add_color_stop_rgb, #add_color_stop_rgba)
Cairo::GradientPattern.
- #color_stop_count ⇒ Object
- #get_color_stop_color ⇒ Object
- #get_color_stop_rgba ⇒ Object
Methods inherited from Pattern
#extend, #filter, gradient_supported?, #initialize, linear_supported?, #matrix, mesh_supported?, radial_supported?, raster_source_supported?, #set_extend, #set_filter, #set_matrix, solid_supported?, supported?, surface_supported?
Constructor Details
This class inherits a constructor from Cairo::Pattern
Instance Method Details
#add_color_stop ⇒ Object Also known as: add_color_stop_rgb, add_color_stop_rgba
Cairo::GradientPattern
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# File 'ext/cairo/rb_cairo_pattern.c', line 306
static VALUE
cr_gradient_pattern_add_color_stop_generic (int argc, VALUE *argv, VALUE self)
{
VALUE offset, red, green, blue, alpha;
int n;
n = rb_scan_args (argc, argv, "23", &offset, &red, &green, &blue, &alpha);
if (n == 2)
{
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 == 2 && rb_cairo__is_kind_of (red, rb_cArray))
{
VALUE ary = red;
n = (int) RARRAY_LEN (ary) + 1;
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 == 4 || (n == 5 && NIL_P (alpha)))
{
cairo_pattern_add_color_stop_rgb (_SELF (self), NUM2DBL (offset),
NUM2DBL (red), NUM2DBL (green),
NUM2DBL (blue));
}
else if (n == 5)
{
cairo_pattern_add_color_stop_rgba (_SELF (self), NUM2DBL (offset),
NUM2DBL (red), NUM2DBL (green),
NUM2DBL (blue), NUM2DBL (alpha));
}
else
{
VALUE inspected;
inspected = rb_funcall (rb_ary_new4 (argc, argv), id_inspect, 0);
rb_raise (rb_eArgError,
"invalid argument: %s (expect "
"(offset, color_name), "
"(offset, color_hex_triplet), "
"(offset, Cairo::Color::RGB), "
"(offset, Cairo::Color::CMYK), "
"(offset, Cairo::Color::HSV), "
"(offset, red, green, blue), "
"(offset, [red, green, blue]), "
"(offset, red, green, blue, alpha) or "
"(offset, [red, green, blue, alpha])"
")",
RVAL2CSTR (inspected));
}
cr_pattern_check_status (_SELF (self));
return self;
}
|
#color_stop_count ⇒ Object
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# File 'ext/cairo/rb_cairo_pattern.c', line 471
static VALUE
cr_gradient_pattern_get_color_stop_count (VALUE self)
{
cairo_status_t status;
int count;
status = cairo_pattern_get_color_stop_count (_SELF (self), &count);
rb_cairo_check_status (status);
return INT2NUM (count);
}
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#get_color_stop_color ⇒ Object
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# File 'ext/cairo/rb_cairo_pattern.c', line 459
static VALUE
cr_gradient_pattern_get_color_stop_color (VALUE self, VALUE index)
{
VALUE result, offset, rgba;
result = cr_gradient_pattern_get_color_stop_rgba (self, index);
offset = rb_ary_shift (result);
rgba = result;
return rb_ary_new3 (2, offset, cr_color_parse (rgba));
}
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#get_color_stop_rgba ⇒ Object
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# File 'ext/cairo/rb_cairo_pattern.c', line 444
static VALUE
cr_gradient_pattern_get_color_stop_rgba (VALUE self, VALUE index)
{
cairo_status_t status;
double offset, red, green, blue, alpha;
status = cairo_pattern_get_color_stop_rgba (_SELF (self), NUM2INT (index),
&offset, &red, &green, &blue,
&alpha);
rb_cairo_check_status (status);
return rb_ary_new3 (5, rb_float_new (offset),
rb_float_new (red), rb_float_new (green),
rb_float_new (blue), rb_float_new (alpha));
}
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