56 lines
1.7 KiB
CoffeeScript
56 lines
1.7 KiB
CoffeeScript
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class @ImageTextModeIDF extends @ImageTextMode
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constructor: ( options ) ->
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super
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@header = { x0: 0, x1: 0, y0: 0, y1: 0 }
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this[k] = v for own k, v of options
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parse: ( content ) ->
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headerData = content.substr( 0, 12 )
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if headerData.length isnt 12 || !headerData.match( '^\x041.4' )
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throw new Error( 'File is not an IDF' )
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@header.x0 = @unpackShort( headerData.substr( 4, 2 ) )
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@header.y0 = @unpackShort( headerData.substr( 6, 2 ) )
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@header.x1 = @unpackShort( headerData.substr( 8, 2 ) )
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@header.y1 = @unpackShort( headerData.substr( 10, 2 ) )
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eodata = content.length - 48 - 4096
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if content.substr( content.length - 128, 5 ) == 'SAUCE'
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eodata -= 128
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@parseFontData( content.substr( eodata, 4096 ) )
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@parsePaletteData( content.substr( eodata + 4096, 48 ) )
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y = 0
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x = 0
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@screen[ y ] = []
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offset = 12
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while offset < eodata
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buffer = content.substr( offset, 2 )
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info = @unpackShort( buffer )
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offset += 2
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len = 1
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if info == 1
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len = @unpackShort( content.substr( offset, 2 ) ) & 255
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offset += 2
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buffer = content.substr( offset, 2 )
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offset += 2
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ch = buffer.substr( 0, 1 )
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attr = @getByteAt( buffer, 1 )
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for i in [ 1 .. len ]
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@screen[ y ][ x ] = { 'ch': ch, 'attr': attr }
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x++
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if x > @header.x1
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x = 0
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y++
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@screen[ y ] = []
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@screen.pop() if @screen[ y ].length == 0
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