[SDL] Displaying keys pushed on european keyboards?

Forest Hale havoc at ghdigital.com
Fri Jul 22 00:04:21 PDT 2011


While technically possible, such a use of char * would be in very poor taste, especially considering endianness concerns :)

If it were a void * that would make some sense.

In any case the event generates UTF-8 text from my experience.

On 07/21/2011 09:08 PM, Alex Barry wrote:
> char* can still hold unicode characters, since it is just a pointer to
> 8 byte chunks.  UTF-8 characters could be held in 1 char each,
> meanwhile UTF-16 in 2 chars each, etc.
>
> On Thu, Jul 21, 2011 at 10:09 PM, Forest Hale<havoc at ghdigital.com>  wrote:
>> SDL_TextInputEvent provides a UTF-8 sequence of text that was typed by the
>> user, which as I understand it may consist of multiple characters (and
>> multiple bytes per character), including accent characters that modify the
>> previous character.
>>
>> This is sometimes called MultiByte text, each character may consist of 1-5
>> bytes of data, see the wikipedia page for an explanation:
>> http://en.wikipedia.org/wiki/UTF-8
>>
>> When someone speaks of Unicode they are often referring to UTF-16, where
>> each character may consist of 1 or 2 unsigned shorts (wchar_t):
>> http://en.wikipedia.org/wiki/UTF-16
>>
>> The more or less canonical version of the Unicode system (where anything is
>> a single unsigned int) is:
>> http://en.wikipedia.org/wiki/UTF-32
>>
>> It is important to remember that text rendering can be rather ambiguous even
>> in UTF-32 because of accent modifier sequences on a previous character.
>>
>> I don't know a lot about the details of Unicode text rendering, so I'm not
>> much help beyond this basic information, my personal preference when
>> programming is to use UTF-8, chiefly because it is compatible with regular
>> asprintf and friends (in the sense that high characters will pass through
>> "safely", one still must be careful with lengths).
>>
>> On 07/21/2011 06:33 PM, Patrick Baggett wrote:
>>>
>>> Unless it is UTF-8 encoded. What is being pointed to by it?
>>>
>>> On Thu, Jul 21, 2011 at 6:56 PM, VernJensen<vern at actionsoft.com
>>> <mailto:vern at actionsoft.com>>  wrote:
>>>
>>>     __
>>>     **UPDATE**
>>>
>>>     So I wrote code to use the unicode value of the structure, and it turns
>>> out it's always 0.
>>>
>>>     The SDL 1.3 code marks for this field in the headers (SDL_Keyboard.h):
>>>
>>>     /**<  \deprecated use SDL_TextInputEvent instead */
>>>
>>>     However, SDL_TextInputEvent uses a char * for the input string, which
>>> would *not* be unicode either.
>>>
>>>     So I'm guessing there is no way to do this in SDL 1.3?
>>>
>>>     _______________________________________________
>>>     SDL mailing list
>>>     SDL at lists.libsdl.org<mailto:SDL at lists.libsdl.org>
>>>     http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> SDL mailing list
>>> SDL at lists.libsdl.org
>>> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
>>
>>
>> --
>> LordHavoc
>> Author of DarkPlaces Quake1 engine - http://icculus.org/twilight/darkplaces
>> Co-designer of Nexuiz - http://alientrap.org/nexuiz
>> "War does not prove who is right, it proves who is left." - Unknown
>> "Any sufficiently advanced technology is indistinguishable from a rigged
>> demo." - James Klass
>> "A game is a series of interesting choices." - Sid Meier
>>
>> _______________________________________________
>> SDL mailing list
>> SDL at lists.libsdl.org
>> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
>>
> _______________________________________________
> SDL mailing list
> SDL at lists.libsdl.org
> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
>


-- 
LordHavoc
Author of DarkPlaces Quake1 engine - http://icculus.org/twilight/darkplaces
Co-designer of Nexuiz - http://alientrap.org/nexuiz
"War does not prove who is right, it proves who is left." - Unknown
"Any sufficiently advanced technology is indistinguishable from a rigged demo." - James Klass
"A game is a series of interesting choices." - Sid Meier




More information about the SDL mailing list