49 lines
1.5 KiB
PHP
49 lines
1.5 KiB
PHP
fontname equ 'font8x16.bmp'
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virtual at 0
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file fontname, 3Eh
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; sanity check
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load a1 word from 0
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load a2 dword from 0xE
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if (a1 <> 'BM') | (a2 <> 0x28)
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error 'not BMP file!'
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end if
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load a1 dword from 0x12
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load a2 dword from 0x16
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if (a1 and 0xF) | (a2 and 0xF) | (a1 > 16*16)
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error 'font: invalid width or height'
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end if
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font_width = a1 shr 4
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font_bmp_scanline = (font_width*2 + 3) and not 3
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font_height = a2 shr 4
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load a1 dword from 0x1A
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if a1 <> 0x10001
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error 'font: not monochrome bitmap'
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end if
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end virtual
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font:
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repeat font_height
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cur_scan = %
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repeat 256
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virtual at 0
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a2 = (font_width+14) shr 3
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if cur_scan=1 & %=0x10
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a2 = (font_width+7) shr 3
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end if
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file fontname:3Eh + font_bmp_scanline*(font_height*(16-((%-1) shr 4))-cur_scan) + ((((%-1) and 0xF)*font_width) shr 3), a2
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dd 0
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load a1 dword from 0
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a1 = ((a1 and 0x55555555) shl 1) or ((a1 and 0xAAAAAAAA) shr 1)
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a1 = ((a1 and 0x33333333) shl 2) or ((a1 and 0xCCCCCCCC) shr 2)
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a1 = ((a1 and 0x0F0F0F0F) shl 4) or ((a1 and 0xF0F0F0F0) shr 4)
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end virtual
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a1 = (a1 shr (((%-1)*font_width) and 7)) and ((1 shl font_width) - 1)
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a1 = a1 xor ((1 shl font_width) - 1)
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if font_width > 8
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dw a1
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else
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db a1
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end if
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end repeat
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end repeat
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