Class: Magick::RVG::Utility::GraphicContext
- Inherits:
-
Object
- Object
- Magick::RVG::Utility::GraphicContext
- Defined in:
- lib/rvg/misc.rb
Overview
class TextAttributes
Constant Summary collapse
- FONT_STRETCH =
{: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}
- FONT_STYLE =
{:normal => Magick::NormalStyle, :italic => Magick::ItalicStyle, :oblique => Magick::ObliqueStyle}
- FONT_WEIGHT =
{'normal' => Magick::NormalWeight, 'bold' => Magick::BoldWeight, 'bolder' => Magick::BolderWeight, 'lighter' => Magick::LighterWeight}
- TEXT_ANCHOR =
{:start => Magick::StartAnchor, :middle => Magick::MiddleAnchor, :end => Magick::EndAnchor}
- ANCHOR_TO_ALIGN =
{:start => Magick::LeftAlign, :middle => Magick::CenterAlign, :end => Magick::RightAlign}
- TEXT_DECORATION =
{:none => Magick::NoDecoration, :underline => Magick::UnderlineDecoration, :overline => Magick::OverlineDecoration, :line_through => Magick::LineThroughDecoration}
- TEXT_STRATEGIES =
{'lr-tb'=>LRTextStrategy, 'lr'=>LRTextStrategy, 'rt-tb'=>RLTextStrategy, 'rl'=>RLTextStrategy, 'tb-rl'=>TBTextStrategy, 'tb'=>TBTextStrategy}
Instance Attribute Summary collapse
-
#gc ⇒ Object
readonly
Returns the value of attribute gc.
-
#text_attrs ⇒ Object
readonly
Returns the value of attribute text_attrs.
Class Method Summary collapse
Instance Method Summary collapse
- #affine(sx, rx, ry, sy, tx, ty) ⇒ Object
- #baseline_shift(value) ⇒ Object
- #font(name) ⇒ Object
- #font_family(name) ⇒ Object
- #font_size(points) ⇒ Object
- #font_stretch(stretch) ⇒ Object
- #font_style(style) ⇒ Object
- #font_weight(weight) ⇒ Object
- #glyph_orientation_horizontal(deg) ⇒ Object
- #glyph_orientation_vertical(deg) ⇒ Object
-
#initialize ⇒ GraphicContext
constructor
A new instance of GraphicContext.
- #inspect ⇒ Object
- #letter_spacing(value) ⇒ Object
- #method_missing(methID, *args, &block) ⇒ Object
- #pop ⇒ Object
- #push ⇒ Object
- #rotate(degrees) ⇒ Object
- #scale(sx, sy) ⇒ Object
- #shadow ⇒ Object
- #skewX(degrees) ⇒ Object
- #skewY(degrees) ⇒ Object
- #stroke_width(width) ⇒ Object
- #text(x, y, text) ⇒ Object
- #text_anchor(anchor) ⇒ Object
- #text_decoration(decoration) ⇒ Object
- #translate(tx, ty) ⇒ Object
- #word_spacing(value) ⇒ Object
- #writing_mode(mode) ⇒ Object
Constructor Details
#initialize ⇒ GraphicContext
Returns a new instance of GraphicContext.
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# File 'lib/rvg/misc.rb', line 508 def initialize @gc = Magick::Draw.new @shadow = [] @shadow << Magick::Draw.new @text_attrs = TextAttributes.new init_matrix end |
Dynamic Method Handling
This class handles dynamic methods through the method_missing method
#method_missing(methID, *args, &block) ⇒ Object
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# File 'lib/rvg/misc.rb', line 516 def method_missing(methID, *args, &block) @gc.__send__(methID, *args, &block) end |
Instance Attribute Details
#gc ⇒ Object (readonly)
Returns the value of attribute gc.
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# File 'lib/rvg/misc.rb', line 506 def gc @gc end |
#text_attrs ⇒ Object (readonly)
Returns the value of attribute text_attrs.
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# File 'lib/rvg/misc.rb', line 506 def text_attrs @text_attrs end |
Class Method Details
.degrees_to_radians(deg) ⇒ Object
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# File 'lib/rvg/misc.rb', line 480 def self.degrees_to_radians(deg) Math::PI * (deg % 360.0) / 180.0 end |
Instance Method Details
#affine(sx, rx, ry, sy, tx, ty) ⇒ Object
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# File 'lib/rvg/misc.rb', line 520 def affine(sx, rx, ry, sy, tx, ty) sx, rx, ry, sy, tx, ty = Magick::RVG.convert_to_float(sx, rx, ry, sy, tx, ty) @gc.affine(sx, rx, ry, sy, tx, ty) @text_attrs.set_affine(sx, rx, ry, sy, tx, ty) nil end |
#baseline_shift(value) ⇒ Object
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# File 'lib/rvg/misc.rb', line 527 def baseline_shift(value) @text_attrs.baseline_shift = case value when 'baseline', 'sub', 'super' value.intern when /[-+]?\d+%/, Numeric value else :baseline end nil end |
#font(name) ⇒ Object
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# File 'lib/rvg/misc.rb', line 539 def font(name) @gc.font(name) @shadow[-1].font = name nil end |
#font_family(name) ⇒ Object
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# File 'lib/rvg/misc.rb', line 545 def font_family(name) @gc.font_family(name) @shadow[-1].font_family = name nil end |
#font_size(points) ⇒ Object
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# File 'lib/rvg/misc.rb', line 551 def font_size(points) @gc.font_size(points) @shadow[-1].pointsize = points nil end |
#font_stretch(stretch) ⇒ Object
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# File 'lib/rvg/misc.rb', line 557 def font_stretch(stretch) stretch = FONT_STRETCH.fetch(stretch.intern, Magick::NormalStretch) @gc.font_stretch(stretch) @shadow[-1].font_stretch = stretch nil end |
#font_style(style) ⇒ Object
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# File 'lib/rvg/misc.rb', line 564 def font_style(style) style = FONT_STYLE.fetch(style.intern, Magick::NormalStyle) @gc.font_style(style) @shadow[-1].font_style = style nil end |
#font_weight(weight) ⇒ Object
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# File 'lib/rvg/misc.rb', line 571 def font_weight(weight) # If the arg is not in the hash use it directly. Handles numeric values. weight = FONT_WEIGHT.fetch(weight) {|key| key} @gc.font_weight(weight) @shadow[-1].font_weight = weight nil end |
#glyph_orientation_horizontal(deg) ⇒ Object
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# File 'lib/rvg/misc.rb', line 579 def glyph_orientation_horizontal(deg) deg = Magick::RVG.convert_one_to_float(deg) @text_attrs.glyph_orientation_horizontal = (deg % 360) / 90 * 90 nil end |
#glyph_orientation_vertical(deg) ⇒ Object
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# File 'lib/rvg/misc.rb', line 585 def glyph_orientation_vertical(deg) deg = Magick::RVG.convert_one_to_float(deg) @text_attrs.glyph_orientation_vertical = (deg % 360) / 90 * 90 nil end |
#inspect ⇒ Object
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# File 'lib/rvg/misc.rb', line 591 def inspect @gc.inspect end |
#letter_spacing(value) ⇒ Object
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# File 'lib/rvg/misc.rb', line 595 def letter_spacing(value) @text_attrs.letter_spacing = Magick::RVG.convert_one_to_float(value) nil end |
#pop ⇒ Object
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# File 'lib/rvg/misc.rb', line 607 def pop @gc.pop @shadow.pop @text_attrs.pop nil end |
#push ⇒ Object
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# File 'lib/rvg/misc.rb', line 600 def push @gc.push @shadow.push(@shadow.last.dup) @text_attrs.push nil end |
#rotate(degrees) ⇒ Object
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# File 'lib/rvg/misc.rb', line 614 def rotate(degrees) degrees = Magick::RVG.convert_one_to_float(degrees) @gc.rotate(degrees) @sx = Math.cos(GraphicContext.degrees_to_radians(degrees)) @rx = Math.sin(GraphicContext.degrees_to_radians(degrees)) @ry = -Math.sin(GraphicContext.degrees_to_radians(degrees)) @sy = Math.cos(GraphicContext.degrees_to_radians(degrees)) concat_matrix nil end |
#scale(sx, sy) ⇒ Object
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# File 'lib/rvg/misc.rb', line 625 def scale(sx, sy) sx, sy = Magick::RVG.convert_to_float(sx, sy) @gc.scale(sx, sy) @sx, @sy = sx, sy concat_matrix nil end |
#shadow ⇒ Object
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# File 'lib/rvg/misc.rb', line 633 def shadow @shadow.last end |
#skewX(degrees) ⇒ Object
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# File 'lib/rvg/misc.rb', line 637 def skewX(degrees) degrees = Magick::RVG.convert_one_to_float(degrees) @gc.skewX(degrees) @ry = Math.tan(GraphicContext.degrees_to_radians(degrees)) concat_matrix nil end |
#skewY(degrees) ⇒ Object
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# File 'lib/rvg/misc.rb', line 645 def skewY(degrees) degrees = Magick::RVG.convert_one_to_float(degrees) @gc.skewY(degrees) @rx = Math.tan(GraphicContext.degrees_to_radians(degrees)) concat_matrix nil end |
#stroke_width(width) ⇒ Object
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# File 'lib/rvg/misc.rb', line 653 def stroke_width(width) width = Magick::RVG.convert_one_to_float(width) @gc.stroke_width(width) @shadow[-1].stroke_width = width nil end |
#text(x, y, text) ⇒ Object
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# File 'lib/rvg/misc.rb', line 660 def text(x, y, text) return if text.length == 0 if @text_attrs.non_default? text_renderer = TEXT_STRATEGIES[@text_attrs.writing_mode].new(self) else text_renderer = DefaultTextStrategy.new(self) end text_renderer.render(x, y, text) end |
#text_anchor(anchor) ⇒ Object
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# File 'lib/rvg/misc.rb', line 671 def text_anchor(anchor) anchor = anchor.intern anchor_enum = TEXT_ANCHOR.fetch(anchor, Magick::StartAnchor) @gc.text_anchor(anchor_enum) align = ANCHOR_TO_ALIGN.fetch(anchor, Magick::LeftAlign) @shadow[-1].align = align @text_attrs.text_anchor = anchor nil end |
#text_decoration(decoration) ⇒ Object
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# File 'lib/rvg/misc.rb', line 681 def text_decoration(decoration) decoration = TEXT_DECORATION.fetch(decoration.intern, Magick::NoDecoration) @gc.decorate(decoration) @shadow[-1].decorate = decoration nil end |
#translate(tx, ty) ⇒ Object
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# File 'lib/rvg/misc.rb', line 688 def translate(tx, ty) tx, ty = Magick::RVG.convert_to_float(tx, ty) @gc.translate(tx, ty) @tx, @ty = tx, ty concat_matrix nil end |
#word_spacing(value) ⇒ Object
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# File 'lib/rvg/misc.rb', line 696 def word_spacing(value) @text_attrs.word_spacing = Magick::RVG.convert_one_to_float(value) nil end |
#writing_mode(mode) ⇒ Object
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# File 'lib/rvg/misc.rb', line 701 def writing_mode(mode) @text_attrs.writing_mode = mode nil end |