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| | <code>.dg1</code> files begin with ASCII "{{magic|DGU}}". | | <code>.dg1</code> files begin with ASCII "{{magic|DGU}}". |
| − |
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| − | <pre>
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| − | PaintShop plus *.PSC (st high resolution)
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| − | *.DA4 (st high resolution, double height)
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| − |
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| − | *.DA4 files are simple screen dumps:
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| − |
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| − | 64000 bytes image data (uncompressed, thus 640x800)
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| − | -----------
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| − | 64000 bytes total for file
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| − |
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| − | *.PSC files are compressed:
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| − |
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| − | 6 bytes file id ["tm89PS"]
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| − | 1 word version [0xCB = 2.03]
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| − | 1 byte ? [always 2]
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| − | 1 byte ? [always 1]
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| − | 1 word image width in pixels - 1 [always 639]
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| − | 1 word image height in pixels - 1 [always 399]
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| − | --------
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| − | 14 bytes total for header
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| − |
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| − | ? image data:
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| − | The image data is not compressed based on pixels, but rather scan lines. Starting at the
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| − | top and working downward. There are 9 unique codes:
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| − |
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| − | Codes:
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| − | 0 set current line all white (0x00)
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| − | 10 copy line above (next byte + 1) times
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| − | 12 copy line above (next byte + 256 + 1) times
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| − | 99 copy from stream 80 * 400 lines (full image)
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| − | 100 fill next line with (next byte) as line style [(b << 8 ) | b]
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| − | 102 fill next line with (next 2 bytes) as line style [(b1 << 8) | b2]
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| − | 110 copy from stream 80 bytes to current line
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| − | 200 set current line all black (0xFF)
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| − | 255 marks end of file (stop process codes)
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| − |
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| − | 'line style' mentioned above is a reference to VDI function vsl_udsty(), set user-defined
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| − | line style pattern. Essentially, fill that line with the bit pattern.
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| − | </pre>
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| | | | |
| | == Software == | | == Software == |
