Stop Press Canvas
From Just Solve the File Format Problem
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| − | '''Stop Press Canvas''' (extension '''.spc''') is an uncompressed fixed-size raster image format, originally associated with the Stop Press graphics package for Amstrad PCW computers. | + | '''Stop Press Canvas''' (extension '''.spc''') is an uncompressed fixed-size monochrome raster image format, originally associated with the Stop Press graphics package for Amstrad PCW computers. |
== Format description == | == Format description == | ||
Latest revision as of 20:00, 28 December 2020
Stop Press Canvas (extension .spc) is an uncompressed fixed-size monochrome raster image format, originally associated with the Stop Press graphics package for Amstrad PCW computers.
[edit] Format description
From John Elliott's SPC2BMP source code (August 1996):
- SPC format:
- SPC describes a black-and-white picture, 720 pixels across by 256 down. The aspect ratio is similar to the 640x200 CGA mode. The file is stored as 32 blocks of 720 bytes.
- Within each block, eight lines are stored, interleaved. The top line is in bytes 0,8,16,...; the second in bytes 1,9,17,... and so on.
- SPC files work from top to bottom and left to right.
(This is essentially the in-memory format of the PCW screen.)
[edit] Examples
- joyce-z80-2.1.10.tar.gz - the source code for the Z80 utilities for the Joyce PCW emulator - includes "joyce.spc".
[edit] Links
- SP2BMSEA.COM, a CP/M / DOS self-extracting archive containing SPC2BMP (compiled programs and source code), which converts this format to BMP. (Archive can be unpacked with PMA / LHA tools.)
- http://oliwright.pythonanywhere.com/ - converts other image files to SPC format
