Bob Jung wrote:
My recollection is that Frank's implementation only uses ATSUI as a last resort.I did. I hit that two years ago and find out it is very difficult to port "traditional" application to use ATSUI apis due to the mismatch in the api model. I decide to give up that due to the following additional reason
Katsuhiko Momoi wrote:
An Opera developer seems to be facing the same problem as Mozilla did. Frank?- Kat
Subject: Rendering Unicode on the Mac Date: Fri, 16 Mar 2001 06:32:26 -0800 (GMT-0800) From: Lars Marius Garshol <[EMAIL PROTECTED]> To: "Unicode List" <[EMAIL PROTECTED]> I'm trying to help a developer who is trying to render Unicode text on
the Mac, using ATSUI. His problem is that the rendering should happen
progressively as parts of the document become available, but ATSUI
seems to assume that the entire document should be available before
rendering starts.
His solution has been to make a 'Unicode session' for every little
piece of text that is to be rendered, but that solution has led to
unacceptable performance, since opening and closing 'Unicode se! ssions'
is not a light-weight operation.
Is there anyone here who has run into this problem before and can
suggest possible ways to approach it? We could accumulate more text
before rendering, but that would hurt progressive display, and doesn't
sound like a very good solution.
1. ATSUI (in that time, I am not sure the most update version) draw text in normal size (10-12 pt) differently than QuickDraw and it is very difficult to read.
2. If I turn on the font fallkback, there are no way I can control the fallback sequence (in that time, maybe Apple improve it now.) and therefore the performance is VERY VERY VERY bad in the worst case. For example, If I try to draw a string of unicode which are all undefined Unicode (or any string which contains characters that no font in the system can draw), then ATSUI will try to iterate all fonts in the system to draw it and it will almost freeze the computer.
3. Worst of all is our code is cross-platform. In order to use ATSUI, either I change the whole application framework, which is definitely a NO in our project, or I can do what you did, and the performance is bad.
What I did now is to use TEC and QuickDraw and use ATSUI as the fallback strategy in a very limited way (only used to draw several characters that I am sure MacOS have the glyph in the Western fonts)
--Lars M.
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| Frank Yung-Fong Tang Sr. Technical Manager Netscape Communications
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