On 07/16/12 07:59, Matthias Melcher wrote:
>
> On 16.07.2012, at 15:43, Jayaram wrote:
>
>> I was using FLTK 1.1.7 with Nano-X 0.91 and nxlib 0.45. I upgraded these to
>> FLTK 1.3.0, Nano-X and Nxlib to the latest development head to add utf-8
>> support.
>> I see that there is a degradation of performance in displaying screens on
>> the same target that I was running the earlier versions on. I
>> am using pcf font files.
>> Is the newer fltk slower with the utf-8 support added ?
>
> FLTK 1.3 uses larger data types for some basic variables. Graphics
> coordinates are now 32 instead of 16 bits. UTF8 rendering should not have any
> impact for ASCII text. Only when massive amounts of glyphs are required for
> large fonts, initialisation may be slower than usual. There is one additional
> indirection for all graphics calls, but that is in todays CPU terms close to
> nothing. In return we get multiple rendering contexts, including printing.
>
> Other than that , the code is very similar.
>
> Can you specify what exactly seems slower now than it has been?
Perhaps OP's now using antialiased font rendering, whereas before
non-aa.
IIRC back 1.1.7 xft was default off, whereas now its default on.
Try rebuilding fltk with "configure --disable-xft" to see if that
speeds things up.
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