fill_color(*color)
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Sets or returns the fill color.
When called with no argument, it returns the current fill color.
If a single argument is provided, it should be a 6 digit HTML color code.
pdf.fill_color "f0ffc1"
If 4 arguments are provided, the color is assumed to be a CMYK value Values
range from 0 - 100.
pdf.fill_color 0, 99, 95, 0
27: def fill_color(*color)
28: return current_fill_color if color.empty?
29: self.current_fill_color = process_color(*color)
30: set_fill_color
31: end
fill_color=(*color)
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hex2rgb(hex)
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Converts hex string into RGB value array:
>> Prawn::Graphics::Color.hex2rgb("ff7808")
=> [255, 120, 8]
75: def hex2rgb(hex)
76: r,g,b = hex[0..1], hex[2..3], hex[4..5]
77: [r,g,b].map { |e| e.to_i(16) }
78: end
rgb2hex(rgb)
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Converts RGB value array to hex string suitable for use with fill_color and stroke_color
>> Prawn::Graphics::Color.rgb2hex([255,120,8])
=> "ff7808"
66: def rgb2hex(rgb)
67: rgb.map { |e| "%02x" % e }.join
68: end
stroke_color(*color)
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Sets or returns the line stroking color.
When called with no argument, it returns the current stroking color.
If a single argument is provided, it should be a 6 digit HTML color code.
pdf.stroke_color "f0ffc1"
If 4 arguments are provided, the color is assumed to be a CMYK value Values
range from 0 - 100.
pdf.stroke_color 0, 99, 95, 0
49: def stroke_color(*color)
50: return current_stroke_color if color.empty?
51: color = process_color(*color)
52: self.current_stroke_color = color
53: set_stroke_color(color)
54: end
stroke_color=(*color)
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color_space(color)
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117: def color_space(color)
118: case color_type(color)
119: when :RGB
120: :DeviceRGB
121: when :CMYK
122: :DeviceCMYK
123: end
124: end
color_to_s(color)
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113: def color_to_s(color)
114: normalize_color(color).map { |c| '%.3f' % c }.join(' ')
115: end
color_type(color)
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93: def color_type(color)
94: case color
95: when String
96: :RGB
97: when Array
98: :CMYK
99: end
100: end
current_color_space(type)
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184: def current_color_space(type)
185: graphic_state.color_space[type]
186: end
current_fill_color()
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193: def current_fill_color
194: graphic_state.fill_color
195: end
current_fill_color=(color)
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197: def current_fill_color=(color)
198: graphic_state.fill_color = color
199: end
current_stroke_color()
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201: def current_stroke_color
202: graphic_state.stroke_color
203: end
current_stroke_color=(color)
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205: def current_stroke_color=(color)
206: graphic_state.stroke_color = color
207: end
normalize_color(color)
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102: def normalize_color(color)
103: case color_type(color)
104: when :RGB
105: r,g,b = hex2rgb(color)
106: [r / 255.0, g / 255.0, b / 255.0]
107: when :CMYK
108: c,m,y,k = *color
109: [c / 100.0, m / 100.0, y / 100.0, k / 100.0]
110: end
111: end
process_color(*color)
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82: def process_color(*color)
83: case(color.size)
84: when 1
85: color[0]
86: when 4
87: color
88: else
89: raise ArgumentError, 'wrong number of arguments supplied'
90: end
91: end
set_color(type, color, options = {})
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149: def set_color(type, color, options = {})
150: operator = case type
151: when :fill
152: 'scn'
153: when :stroke
154: 'SCN'
155: else
156: raise ArgumentError, "unknown type '#{type}'"
157: end
158:
159: if options[:pattern]
160: set_color_space type, :Pattern
161: add_content "/#{color} #{operator}"
162: else
163: set_color_space type, color_space(color)
164: color = color_to_s(color)
165: write_color(color, operator)
166: end
167: end
set_color_space(type, color_space)
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128: def set_color_space(type, color_space)
129:
130: return if current_color_space(type) == color_space && !state.page.in_stamp_stream?
131: set_current_color_space(color_space, type)
132:
133: unless COLOR_SPACES.include?(color_space)
134: raise ArgumentError, "unknown color space: '#{color_space}'"
135: end
136:
137: operator = case type
138: when :fill
139: 'cs'
140: when :stroke
141: 'CS'
142: else
143: raise ArgumentError, "unknown type '#{type}'"
144: end
145:
146: add_content "/#{color_space} #{operator}"
147: end
set_current_color_space(color_space, type)
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188: def set_current_color_space(color_space, type)
189: save_graphics_state if graphic_state.nil?
190: graphic_state.color_space[type] = color_space
191: end
set_fill_color(color = nil)
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169: def set_fill_color(color = nil)
170: set_color :fill, color || current_fill_color
171: end
set_stroke_color(color = nil)
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173: def set_stroke_color(color = nil)
174: set_color :stroke, color || current_stroke_color
175: end
update_colors()
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177: def update_colors
178: set_fill_color
179: set_stroke_color
180: end
write_color(color, operator)
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217: def write_color(color, operator)
218: add_content "#{color} #{operator}"
219: end
write_fill_color()
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209: def write_fill_color
210: write_color(current_fill_color, 'scn')
211: end
write_stroke_color()
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213: def write_stroke_color
214: write_color(current_fill_color, 'SCN')
215: end
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