https://www.temlib.org/AtariForumWiki/index.php?action=history&feed=atom&title=Picworks_file_format 2026-07-27T05:27:24Z Revision history for this page on the wiki MediaWiki 1.39.2 https://www.temlib.org/AtariForumWiki/index.php?title=Picworks_file_format&diff=16081&oldid=prev 2017-02-08T20:56:59Z

<p>New page</p> <p><b>New page</b></p><div>&lt;pre&gt;<br /> Picworks *.CP3<br /> <br /> Always compressed 640x400 st high resolution images.<br /> <br /> Files do not seem to have any resolution or bit plane info stored in them. The file<br /> extension seems to be the only way to determine the contents.<br /> <br /> Assuming the following:<br /> uint8 *file=malloc(file_size); /* load file in array */<br /> uint32 *bmap=malloc(32000);<br /> decode_cp3(file, bmap);<br /> <br /> /* ported to PureC from Picworks v1 GFABASIC source code */<br /> /* Written by Lonny Pursell - placed in to Public Domain 2/8/2017 */<br /> void decode_cp3(uint8 *data, uint32 *bmap) {<br /> register uint16 *dpeek, cnt, i, c;<br /> register uint32 *lpeek, src=0, dst=0, offset, tmp1, tmp2;<br /> <br /> dpeek = (uint16*)data;<br /> cnt = dpeek[src++];<br /> offset = 2L+2L+4L*(uint32)cnt; /* offset into file */<br /> lpeek = (uint32*)&amp;data[offset]; /* base of long table */<br /> offset = 0; /* reset index */<br /> <br /> for (c=0; c&lt;cnt; c++) {<br /> src++;<br /> if (dpeek[src]) {<br /> for (i=0; i&lt;dpeek[src]; i++) {<br /> bmap[dst++] = lpeek[offset++];<br /> bmap[dst++] = lpeek[offset++];<br /> }<br /> }<br /> src++;<br /> tmp1 = lpeek[offset++];<br /> tmp2 = lpeek[offset++];<br /> for (i=0; i&lt;dpeek[src]; i++) {<br /> bmap[dst++] = tmp1;<br /> bmap[dst++] = tmp2;<br /> }<br /> }<br /> while (dst&lt;8000L) { /* 32000/4 */<br /> bmap[dst++] = lpeek[offset++];<br /> bmap[dst++] = lpeek[offset++];<br /> }<br /> }<br /> &lt;/pre&gt;<br /> Back to [[ST Picture Formats]]</div>

>Lp