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Versions: 18
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Contents
class PSD
class BlendMode
attr_reader :blend_key, :opacity, :clipping
# All of the blend modes are stored in the PSD file with a specific key.
# This is the mapping of that key to its readable name.
BLEND_MODES = {
norm: 'normal',
dark: 'darken',
lite: 'lighten',
hue: 'hue',
sat: 'saturation',
colr: 'color',
lum: 'luminosity',
mul: 'multiply',
scrn: 'screen',
diss: 'dissolve',
over: 'overlay',
hLit: 'hard_light',
sLit: 'soft_light',
diff: 'difference',
smud: 'exclusion',
div: 'color_dodge',
idiv: 'color_burn',
lbrn: 'linear_burn',
lddg: 'linear_dodge',
vLit: 'vivid_light',
lLit: 'linear_light',
pLit: 'pin_light',
hMix: 'hard_mix',
pass: 'passthru',
dkCl: 'darker_color',
lgCl: 'lighter_color',
fsub: 'subtract',
fdiv: 'divide'
}.freeze
def initialize(file)
@file = file
@blend_key = nil
@opacity = nil
@clipping = nil
@flags = nil
end
def parse!
@file.seek 4, IO::SEEK_CUR
@blend_key = @file.read_string(4).strip
@opacity = @file.read_byte
@clipping = @file.read_byte
@flags = @file.read_byte
@file.seek 1, IO::SEEK_CUR
end
def mode
BLEND_MODES[@blend_key.to_sym]
end
alias_method :blending_mode, :mode
def opacity_percentage
@opacity_percentage ||= @opacity * 100 / 255
end
def clipped?
@clipping == 1
end
def transparency_protected
@flags & 0x01
end
def visible
!((@flags & (0x01 << 1)) > 0)
end
def obsolete
(@flags & (0x01 << 2)) > 0
end
def pixel_data_irrelevant
return nil unless (@flags & (0x01 << 3)) > 0
(@flags & (0x01 << 4)) > 0
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems