Class: Magick::RVG::Utility::GraphicContext

Constants

 {:normal          => Magick::NormalStretch,                                    :ultra_condensed => Magick::UltraCondensedStretch,                                    :extra_condensed => Magick::ExtraCondensedStretch,                                    :condensed       => Magick::CondensedStretch,                                    :semi_condensed  => Magick::SemiCondensedStretch,                                    :semi_expanded   => Magick::SemiExpandedStretch,                                    :expanded        => Magick::ExpandedStretch,                                    :extra_expanded  => Magick::ExtraExpandedStretch,                                    :ultra_expanded  => Magick::UltraExpandedStretch}
 {:normal  => Magick::NormalStyle,                                    :italic  => Magick::ItalicStyle,                                    :oblique => Magick::ObliqueStyle}
 {'normal'  => Magick::NormalWeight,                                    'bold'    => Magick::BoldWeight,                                    'bolder'  => Magick::BolderWeight,                                    'lighter' => Magick::LighterWeight}
 {:start  => Magick::StartAnchor,                                    :middle => Magick::MiddleAnchor,                                    :end    => Magick::EndAnchor}
 {:start  => Magick::LeftAlign,                                    :middle => Magick::CenterAlign,                                    :end    => Magick::RightAlign}
 {:none         => Magick::NoDecoration,                                    :underline    => Magick::UnderlineDecoration,                                    :overline     => Magick::OverlineDecoration,                                    :line_through => Magick::LineThroughDecoration}
 {'lr-tb'=>LRTextStrategy, 'lr'=>LRTextStrategy,                                     'rt-tb'=>RLTextStrategy, 'rl'=>RLTextStrategy,                                     'tb-rl'=>TBTextStrategy, 'tb'=>TBTextStrategy}

Attributes

gc	[R]
text_attrs	[R]

Public Class methods

degrees_to_radians(deg)

[Source]

     # File lib/rvg/misc.rb, line 509
509:                 def GraphicContext.degrees_to_radians(deg)
510:                     Math::PI * (deg % 360.0) / 180.0
511:                 end

new()

[Source]

     # File lib/rvg/misc.rb, line 537
537:                 def initialize()
538:                     @gc = Magick::Draw.new
539:                     @shadow = Array.new
540:                     @shadow << Magick::Draw.new
541:                     @text_attrs = TextAttributes.new
542:                     init_matrix()
543:                 end

Public Instance methods

affine(sx, rx, ry, sy, tx, ty)

[Source]

     # File lib/rvg/misc.rb, line 549
549:                 def affine(sx, rx, ry, sy, tx, ty)
550:                     sx, rx, ry, sy, tx, ty = Magick::RVG.convert_to_float(sx, rx, ry, sy, tx, ty)
551:                     @gc.affine(sx, rx, ry, sy, tx, ty)
552:                     @text_attrs.set_affine(sx, rx, ry, sy, tx, ty)
553:                     nil
554:                 end

baseline_shift(value)

[Source]

     # File lib/rvg/misc.rb, line 556
556:                 def baseline_shift(value)
557:                     @text_attrs.baseline_shift = case value
558:                         when 'baseline', 'sub', 'super'
559:                             value.intern
560:                         when /[-+]?\d+%/, Numeric
561:                             value
562:                         else
563:                             :baseline
564:                         end
565:                     nil
566:                 end

font(name)

[Source]

     # File lib/rvg/misc.rb, line 568
568:                 def font(name)
569:                     @gc.font(name)
570:                     @shadow[-1].font = name
571:                     nil
572:                 end

font_family(name)

[Source]

     # File lib/rvg/misc.rb, line 574
574:                 def font_family(name)
575:                     @gc.font_family(name)
576:                     @shadow[-1].font_family = name
577:                     nil
578:                 end

font_size(points)

[Source]

     # File lib/rvg/misc.rb, line 580
580:                 def font_size(points)
581:                     @gc.font_size(points)
582:                     @shadow[-1].pointsize = points
583:                     nil
584:                 end

font_stretch(stretch)

[Source]

     # File lib/rvg/misc.rb, line 586
586:                 def font_stretch(stretch)
587:                     stretch = FONT_STRETCH.fetch(stretch.intern, Magick::NormalStretch)
588:                     @gc.font_stretch(stretch)
589:                     @shadow[-1].font_stretch = stretch
590:                     nil
591:                 end

font_style(style)

[Source]

     # File lib/rvg/misc.rb, line 593
593:                 def font_style(style)
594:                     style = FONT_STYLE.fetch(style.intern, Magick::NormalStyle)
595:                     @gc.font_style(style)
596:                     @shadow[-1].font_style = style
597:                     nil
598:                 end

font_weight(weight)

[Source]

     # File lib/rvg/misc.rb, line 600
600:                 def font_weight(weight)
601:                     # If the arg is not in the hash use it directly. Handles numeric values.
602:                     weight = FONT_WEIGHT.fetch(weight) {|key| key}
603:                     @gc.font_weight(weight)
604:                     @shadow[-1].font_weight = weight
605:                     nil
606:                 end

glyph_orientation_horizontal(deg)

[Source]

     # File lib/rvg/misc.rb, line 608
608:                 def glyph_orientation_horizontal(deg)
609:                     deg = Magick::RVG.convert_one_to_float(deg)
610:                     @text_attrs.glyph_orientation_horizontal = (deg % 360) / 90 * 90
611:                     nil
612:                 end

glyph_orientation_vertical(deg)

[Source]

     # File lib/rvg/misc.rb, line 614
614:                 def glyph_orientation_vertical(deg)
615:                     deg = Magick::RVG.convert_one_to_float(deg)
616:                     @text_attrs.glyph_orientation_vertical = (deg % 360) / 90 * 90
617:                     nil
618:                 end

inspect()

[Source]

     # File lib/rvg/misc.rb, line 620
620:                 def inspect()
621:                     @gc.inspect
622:                 end

letter_spacing(value)

[Source]

     # File lib/rvg/misc.rb, line 624
624:                 def letter_spacing(value)
625:                     @text_attrs.letter_spacing = Magick::RVG.convert_one_to_float(value)
626:                     nil
627:                 end

method_missing(methID, *args, &block)

[Source]

     # File lib/rvg/misc.rb, line 545
545:                 def method_missing(methID, *args, &block)
546:                     @gc.__send__(methID, *args, &block)
547:                 end

pop()

[Source]

     # File lib/rvg/misc.rb, line 636
636:                 def pop()
637:                     @gc.pop
638:                     @shadow.pop
639:                     @text_attrs.pop
640:                     nil
641:                 end

push()

[Source]

     # File lib/rvg/misc.rb, line 629
629:                 def push()
630:                     @gc.push
631:                     @shadow.push(@shadow.last.dup)
632:                     @text_attrs.push
633:                     nil
634:                 end

rotate(degrees)

[Source]

     # File lib/rvg/misc.rb, line 643
643:                 def rotate(degrees)
644:                     degrees = Magick::RVG.convert_one_to_float(degrees)
645:                     @gc.rotate(degrees)
646:                     @sx =  Math.cos(GraphicContext.degrees_to_radians(degrees))
647:                     @rx =  Math.sin(GraphicContext.degrees_to_radians(degrees))
648:                     @ry = -Math.sin(GraphicContext.degrees_to_radians(degrees))
649:                     @sy =  Math.cos(GraphicContext.degrees_to_radians(degrees))
650:                     concat_matrix()
651:                     nil
652:                 end

scale(sx, sy)

[Source]

     # File lib/rvg/misc.rb, line 654
654:                 def scale(sx, sy)
655:                     sx, sy = Magick::RVG.convert_to_float(sx, sy)
656:                     @gc.scale(sx, sy)
657:                     @sx, @sy = sx, sy
658:                     concat_matrix()
659:                     nil
660:                 end

shadow()

[Source]

     # File lib/rvg/misc.rb, line 662
662:                 def shadow()
663:                     @shadow.last
664:                 end

skewX(degrees)

[Source]

     # File lib/rvg/misc.rb, line 666
666:                 def skewX(degrees)
667:                     degrees = Magick::RVG.convert_one_to_float(degrees)
668:                     @gc.skewX(degrees)
669:                     @ry = Math.tan(GraphicContext.degrees_to_radians(degrees))
670:                     concat_matrix()
671:                     nil
672:                 end

skewY(degrees)

[Source]

     # File lib/rvg/misc.rb, line 674
674:                 def skewY(degrees)
675:                     degrees = Magick::RVG.convert_one_to_float(degrees)
676:                     @gc.skewY(degrees)
677:                     @rx = Math.tan(GraphicContext.degrees_to_radians(degrees))
678:                     concat_matrix()
679:                     nil
680:                 end

stroke_width(width)

[Source]

     # File lib/rvg/misc.rb, line 682
682:                 def stroke_width(width)
683:                     width = Magick::RVG.convert_one_to_float(width)
684:                     @gc.stroke_width(width)
685:                     @shadow[-1].stroke_width = width
686:                     nil
687:                 end

text(x, y, text)

[Source]

     # File lib/rvg/misc.rb, line 689
689:                 def text(x, y, text)
690:                     return if text.length == 0
691:                     if @text_attrs.non_default?
692:                         text_renderer = TEXT_STRATEGIES[@text_attrs.writing_mode].new(self)
693:                     else
694:                         text_renderer = DefaultTextStrategy.new(self)
695:                     end
696: 
697:                     return text_renderer.render(x, y, text)
698:                 end

text_anchor(anchor)

[Source]

     # File lib/rvg/misc.rb, line 700
700:                 def text_anchor(anchor)
701:                     anchor = anchor.intern
702:                     anchor_enum = TEXT_ANCHOR.fetch(anchor, Magick::StartAnchor)
703:                     @gc.text_anchor(anchor_enum)
704:                     align = ANCHOR_TO_ALIGN.fetch(anchor, Magick::LeftAlign)
705:                     @shadow[-1].align = align
706:                     @text_attrs.text_anchor = anchor
707:                     nil
708:                 end

text_decoration(decoration)

[Source]

     # File lib/rvg/misc.rb, line 710
710:                 def text_decoration(decoration)
711:                     decoration = TEXT_DECORATION.fetch(decoration.intern, Magick::NoDecoration)
712:                     @gc.decorate(decoration)
713:                     @shadow[-1].decorate = decoration
714:                     nil
715:                 end

translate(tx, ty)

[Source]

     # File lib/rvg/misc.rb, line 717
717:                 def translate(tx, ty)
718:                     tx, ty = Magick::RVG.convert_to_float(tx, ty)
719:                     @gc.translate(tx, ty)
720:                     @tx, @ty = tx, ty
721:                     concat_matrix()
722:                     nil
723:                 end

word_spacing(value)

[Source]

     # File lib/rvg/misc.rb, line 725
725:                 def word_spacing(value)
726:                     @text_attrs.word_spacing = Magick::RVG.convert_one_to_float(value)
727:                     nil
728:                 end

writing_mode(mode)

[Source]

     # File lib/rvg/misc.rb, line 730
730:                 def writing_mode(mode)
731:                     @text_attrs.writing_mode = mode
732:                     nil
733:                 end

Private Instance methods

concat_matrix()

[Source]

     # File lib/rvg/misc.rb, line 521
521:                 def concat_matrix()
522:                     curr = @text_attrs.affine
523:                     sx = curr.sx * @sx + curr.ry * @rx
524:                     rx = curr.rx * @sx + curr.sy * @rx
525:                     ry = curr.sx * @ry + curr.ry * @sy
526:                     sy = curr.rx * @ry + curr.sy * @sy
527:                     tx = curr.sx * @tx + curr.ry * @ty + curr.tx
528:                     ty = curr.rx * @tx + curr.sy * @ty + curr.ty
529:                     @text_attrs.set_affine(sx, rx, ry, sy, tx, ty)
530:                     init_matrix()
531:                 end

init_matrix()

[Source]

     # File lib/rvg/misc.rb, line 515
515:                 def init_matrix()
516:                     @rx = @ry = 0
517:                     @sx = @sy = 1
518:                     @tx = @ty = 0
519:                 end

Methods

Constants

Attributes

Public Class methods

Public Instance methods

Private Instance methods