<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "> <br><div><div>On Oct 31, 2010, at 12:18 AM, Gregor Kiczales wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Also I would have thought that 'forcing' the image by actually drawing it would save the bitmap so that future drawing was faster. But I may not understand how this is actually working.</div></blockquote><br></div><div>I suggested something like this some months ago -- specifically, a graphics function named "cache-bitmap" or something like that, which acts like the identity function, but when it is rendered, it remembers the bitmap for future reference.  If it appeared in the middle of an image tree, it would effectively mean "traverse my subtree only the first time you render me; after that, use the cached bitmap instead."</div><br><div> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: 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: 0; "><div>Stephen Bloch</div><div><a href="mailto:sbloch@adelphi.edu">sbloch@adelphi.edu</a></div><div><br class="webkit-block-placeholder"></div></span><br class="Apple-interchange-newline"> </div><br></body></html>