Paintworks
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== Sample files == | == Sample files == | ||
− | * | + | * {{DexvertSamples|image/paintworks}} |
== Links == | == Links == |
Latest revision as of 04:06, 28 December 2023
Paintworks is a graphics program for the Atari ST published by Activision in 1986.
CL0/SC0
files are 320x200 with 16 colors
CL1/SC1
files are 640x200 with 4 colors
CL2/SC2
files are 640x400 in mono
Contents |
[edit] Identification
From the Atari Forum Wiki page (see #Links):
Paintworks *.SC0 *.CL0 (st low resolution) *.SC1 *.CL1 (st medium resolution) *.SC2 *.CL2 (st high resolution) *.PG0 (st low resolution, double high) *.PG1 (st medium resolution, double high) *.PG2 (st high resolution, double high) Early versions of Paintworks were called N-Vision. These are often mistaken as NEOchrome files. One should not rely on the file extension to determine the contents. 1 word file id [0x00] recommend using 'secondary file id' for identification 1 word resolution [0 = low, 1 = medium, 2 = high] recommend using 'flags' to determine resolution 16 words palette 12 bytes file name, usually [" . "] 1 word ? 1 word ? 1 word ? 9 bytes secondary file id ["ANvisionA"] 1 byte flags, bit field: cxrrtttt c = compression flag [1 = compressed] x = not used r = resolution [0 = low, 1 = medium, 2 = high] t = type [0 = page, 1 = screen, 2 = clipart, 4 = pattern] page = double high, thus 320x400, 640x400, 640x800 screen = standard st resolutions clipart = standard st resolutions pattern = no documentation at this time 64 bytes ? --------- 128 bytes total for header ? image data: Uncompressed images are simply screen dumps as one might expect. Compressed images are a two step process, RLE decoding and re-ordering. RLE decompression: /* Written by Lonny Pursell - placed in to Public Domain 1/28/2017 */ void decode_rle(uint8 *data, uint8 *bmap, uint32 bms) { uint8 cmd, chr; uint16 i; uint32 src=0, dst=0, cnt=0; do { cmd = data[src++]; if (cmd & 0x80) { /* literal? */ cmd = cmd & 0x7f; memcpy(&bmap[dst], &data[src], (uint32)cmd); dst = dst + (uint32)cmd; src = src + (uint32)cmd; } else { /* repeat? */ chr = data[src++]; for (i=0; i<cmd; i++) { bmap[dst++] = chr; } } cnt = cnt + cmd; } while (cnt<bms); } The uncompressed data is arranged as follows: ST low resolution: All of plane 0..., all of plane 1..., all of plane 2..., all of plane 3... ST medium resolution All of plane 0..., all of plane 1... ST high resolution: No rendering required.
[edit] Software
[edit] Sample files
[edit] Links
Categories:
- File Formats
- Electronic File Formats
- Graphics
- File formats with extension .cl0
- File formats with extension .sc0
- File formats with extension .cl1
- File formats with extension .sc1
- File formats with extension .cl2
- File formats with extension .sc2
- File formats with extension .pg0
- File formats with extension .pg1
- File formats with extension .pg2