class Magick::RVG::Utility::LRTextStrategy

Public Instance Methods

get_letter_spacing(glyph) click to toggle source
# File lib/rvg/misc.rb, line 171
def get_letter_spacing(glyph)
    gx, gy = glyph_metrics(@ctx.text_attrs.glyph_orientation_horizontal, glyph)
    [gx+@ctx.text_attrs.letter_spacing, gy]
end
get_word_spacing() click to toggle source
# File lib/rvg/misc.rb, line 166
def get_word_spacing
    @word_space ||= glyph_metrics(@ctx.text_attrs.glyph_orientation_horizontal, ' ')[0]
    [@word_space + @ctx.text_attrs.word_spacing, 0]
end
render(x, y, text) click to toggle source
# File lib/rvg/misc.rb, line 176
def render(x, y, text)
    x_rel_coords, y_rel_coords = text_rel_coords(text)
    dx = x_rel_coords.inject(0) {|sum, a| sum + a}
    dy = y_rel_coords.max

    # We're handling the anchoring.
    @ctx.gc.push
    @ctx.gc.text_anchor(Magick::StartAnchor)
    if @ctx.text_attrs.text_anchor == :end
        x -= dx
    elsif @ctx.text_attrs.text_anchor == :middle
        x -= dx / 2
    end

    # Align the first glyph
    case @ctx.text_attrs.glyph_orientation_horizontal
        when 0

        when 90
            y -= dy
        when 180
            x += x_rel_coords.shift
            x_rel_coords << 0
            y -= dy
        when 270
            x += x_rel_coords[0]
    end

    y += shift_baseline(@ctx.text_attrs.glyph_orientation_horizontal, text[0,1])

    first_word = true
    text.split(::Magick::RVG::WORD_SEP).each do |word|
        unless first_word
            x += x_rel_coords.shift
        end
        first_word = false
        word.split('').each do |glyph|
            render_glyph(@ctx.text_attrs.glyph_orientation_horizontal, x, y, glyph)
            x += x_rel_coords.shift
        end
    end

    @ctx.gc.pop
    [dx, 0]
end