Class: OpenCV::CvFont

Inherits:
Object
  • Object
show all
Defined in:
ext/opencv/cvfont.cpp,
ext/opencv/cvfont.cpp

Overview

Font structure that can be passed to text rendering functions. see CvMat#put_text, CvMat#put_text!

Constant Summary collapse

FACE = 
face
FONT_OPTION = 
default_option

Instance Method Summary collapse

Constructor Details

#new(face, font_option = nil) ⇒ Object

Create font object

Examples:

Create Font

OpenCV::CvFont.new(:simplex, :hscale => 2, :vslace => 2, :italic => true)
# create 2x bigger than normal, italic type font.

Parameters:

  • face (Symbol) —

    Font name identifier. Only a subset of Hershey fonts (sources.isc.org/utils/misc/hershey-font.txt) are supported now:

    • :simplex - normal size sans-serif font

    • :plain - small size sans-serif font

    • :duplex - normal size sans-serif font (more complex than :simplex)

    • :complex - normal size serif font

    • :triplex - normal size serif font (more complex than :complex)

    • :complex_small - smaller version of :complex

    • :script_simplex - hand-writing style font

    • :script_complex - more complex variant of :script_simplex

  • font_option (Hash) —

    should be Hash include these keys.



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# File 'ext/opencv/cvfont.cpp', line 76

VALUE
rb_initialize(int argc, VALUE *argv, VALUE self)
{
  VALUE face, font_option;
  rb_scan_args(argc, argv, "11", &face, &font_option);
  Check_Type(face, T_SYMBOL);
  face = rb_hash_lookup(rb_const_get(cCvFont::rb_class(), rb_intern("FACE")), face);
  if (NIL_P(face)) {
    rb_raise(rb_eArgError, "undefined face.");
  }
  font_option = FONT_OPTION(font_option);

  int font_face = NUM2INT(face);
  if (FO_ITALIC(font_option)) {
    font_face |= CV_FONT_ITALIC;
  }
  try {
    cvInitFont(CVFONT(self),
	       font_face,
	       FO_HSCALE(font_option),
	       FO_VSCALE(font_option),
	       FO_SHEAR(font_option),
	       FO_THICKNESS(font_option),
	       FO_LINE_TYPE(font_option));
  }
  catch (cv::Exception& e) {
    raise_cverror(e);
  }

  return self;
}

Instance Method Details

#face ⇒ Fixnum

Returns font face

Returns:

  • (Fixnum) —

    Font face



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# File 'ext/opencv/cvfont.cpp', line 113

VALUE
rb_face(VALUE self)
{
  return INT2FIX(CVFONT(self)->font_face);
}

#hscale ⇒ Number

Returns hscale

Returns:

  • (Number) —

    hscale



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# File 'ext/opencv/cvfont.cpp', line 124

VALUE
rb_hscale(VALUE self)
{
  return rb_float_new(CVFONT(self)->hscale);
}

#italic ⇒ Boolean

Returns italic or not

Returns:

  • (Boolean) —

    self is italic or not



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# File 'ext/opencv/cvfont.cpp', line 179

VALUE
rb_italic(VALUE self)
{
  return ((CVFONT(self)->font_face & CV_FONT_ITALIC) > 0) ? Qtrue : Qfalse;
}

#line_type ⇒ Fixnum

Returns line type

Returns:

  • (Fixnum) —

    line_type



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# File 'ext/opencv/cvfont.cpp', line 168

VALUE
rb_line_type(VALUE self)
{
  return INT2FIX(CVFONT(self)->line_type);
}

#shear ⇒ Number

Returns shear

Returns:

  • (Number) —

    shear



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# File 'ext/opencv/cvfont.cpp', line 146

VALUE
rb_shear(VALUE self)
{
  return rb_float_new(CVFONT(self)->shear);
}

#thickness ⇒ Fixnum

Returns thickness

Returns:

  • (Fixnum) —

    thickness



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# File 'ext/opencv/cvfont.cpp', line 157

VALUE
rb_thickness(VALUE self)
{
  return INT2FIX(CVFONT(self)->thickness);
}

#vscale ⇒ Number

Returns vscale

Returns:

  • (Number) —

    vscale



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# File 'ext/opencv/cvfont.cpp', line 135

VALUE
rb_vscale(VALUE self)
{
  return rb_float_new(CVFONT(self)->vscale);
}