attachment-0001
<html><head><base href="x-msg://4/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On Apr 28, 2011, at 9:46 PM, Roy Samuel wrote:</div><blockquote type="cite"><span class="Apple-style-span" style="font-family: Calibri, sans-serif; font-size: 15px; ">...</span></blockquote><blockquote type="cite"><span class="Apple-style-span" style="font-family: Calibri, sans-serif; font-size: 15px; ">I found that neither of the directories contained files that adhered to the draft document w.r.t parsing the header. Specifically for the value of ‘NumColors’.</span><span class="Apple-style-span" style="border-collapse: separate; font-family: 'Andale Mono'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div lang="EN-US" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p></o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">--1--<o:p></o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">According to the draft document, bytes 420-423 need to contain ‘NumColors’ value, however, I found them to be zero. Are the sample files outdated??</div></div></div></span></blockquote><div><br></div>Not exactly outdated, just the code that generated them (and the page headers) contains an error. I will post updates next week.</div><div><span class="Apple-style-span" style="font-family: Calibri, sans-serif; font-size: 15px; "> </span></div><div><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: 'Andale Mono'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div lang="EN-US" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">--2--<o:p></o:p></div></div></div></span><span class="Apple-style-span" style="font-family: Calibri, sans-serif; font-size: 15px; ">...</span></blockquote><blockquote type="cite"><span class="Apple-style-span" style="font-family: Calibri, sans-serif; font-size: 15px; ">(I use GIMP to open the output raster file in RAW mode).</span><span class="Apple-style-span" style="border-collapse: separate; font-family: 'Andale Mono'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div lang="EN-US" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p></o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">I have attached a screenshot of the output file that I’m able to view through GIMP (scaled down version).<o:p></o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">Is my algorithm wrong? Or are the specs incorrect?<o:p></o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "></div></div></div></span></blockquote><div><br></div>I would suspect the former since the compression code that generated the files has been in use for many years now.</div><div><br></div><div>Another tool you can use is RasterView, available here (with source):</div><div><br></div><div> <a href="http://www.easysw.com/~mike/rasterview/">http://www.easysw.com/~mike/rasterview/</a></div><div><br></div><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div>__________________________________________________</div><div>Michael Sweet, Senior Printing System Engineer, PWG Chair<br></div></span>
</div>
<br><br />--
<br />This message has been scanned for viruses and
<br />dangerous content by
<a href="http://www.mailscanner.info/"><b>MailScanner</b></a>, and is
<br />believed to be clean.
</body></html>