Module: OilyPNG::Color

Extended by:
Color
Included in:
Color
Defined in:
lib/oily_png/canvas.rb,
ext/oily_png/oily_png_ext.c

Instance Method Summary collapse

Instance Method Details

#a(value) ⇒ Object 



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# File 'ext/oily_png/color.c', line 65

VALUE oily_png_color_a(VALUE self, VALUE value) {
  UNUSED_PARAMETER(self);
  return INT2FIX(A_BYTE(NUM2UINT(value)));
}

#b(value) ⇒ Object 



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# File 'ext/oily_png/color.c', line 60

VALUE oily_png_color_b(VALUE self, VALUE value) {
  UNUSED_PARAMETER(self);
  return INT2FIX(B_BYTE(NUM2UINT(value)));
}

#compose_quick(fg_color, bg_color) ⇒ Object 



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# File 'ext/oily_png/color.c', line 36

VALUE oily_png_color_compose_quick(VALUE self, VALUE fg_color, VALUE bg_color) {
  UNUSED_PARAMETER(self);
  return UINT2NUM(oily_png_compose_color(NUM2UINT(fg_color), NUM2UINT(bg_color)));
}

#euclidean_distance_rgba(color_after, color_before) ⇒ Object 



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# File 'ext/oily_png/color.c', line 41

VALUE oily_png_euclidean_distance_rgba(VALUE self, VALUE color_after, VALUE color_before) {
  UNUSED_PARAMETER(self);

  return rb_float_new(sqrt(pow((R_BYTE(NUM2UINT(color_after)) - R_BYTE(NUM2UINT(color_before))), 2) +
                           pow((G_BYTE(NUM2UINT(color_after)) - G_BYTE(NUM2UINT(color_before))), 2) +
                           pow((B_BYTE(NUM2UINT(color_after)) - B_BYTE(NUM2UINT(color_before))), 2) +
                           pow((A_BYTE(NUM2UINT(color_after)) - A_BYTE(NUM2UINT(color_before))), 2)));
}

#g(value) ⇒ Object 



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# File 'ext/oily_png/color.c', line 55

VALUE oily_png_color_g(VALUE self, VALUE value) {
  UNUSED_PARAMETER(self);
  return INT2FIX(G_BYTE(NUM2UINT(value)));
}

#r(value) ⇒ Object 



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# File 'ext/oily_png/color.c', line 50

VALUE oily_png_color_r(VALUE self, VALUE value) {
  UNUSED_PARAMETER(self);
  return INT2FIX(R_BYTE(NUM2UINT(value)));
}