neutrino arabic/hebrew font support

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mohousch
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Registriert: Mittwoch 14. Dezember 2005, 03:25

neutrino arabic/hebrew font support

Beitrag von mohousch »

it seems like fribdidi code from VDR/XBMC works in neutrino, with higher libfribidi version arabic text can be right rendered but some times neutrino crashes when fribidi try to mirror charset, my poor knowldge about fribidi are not enought to fix this bug ;( it could be very pretty if someone (cst?) take a look a this issue
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seife
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Registriert: Sonntag 2. November 2003, 12:36

Re: neutrino arabic/hebrew font support

Beitrag von seife »

How large is the code size increase and the fribidi library? You need to consider that the tuxbox-SD boxes all have limited FLASH size (in today's standards ;)
mohousch
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Re: neutrino arabic/hebrew font support

Beitrag von mohousch »

Oh sorry i wrote in wrong section

the peace code is very very small, stripped libfribidi is about 33 kb not stripped 39kb

Code: Alles auswählen

//
#if defined (ENABLE_FRIBIDI)
std::string fribidiShapeChar(const char * text)
{
	int len = strlen(text);
	char Rtl[len + 1];
	
	//
	fribidi_set_mirroring(true);
	fribidi_set_reorder_nsm(false);
	
	// init to utf-8
	FriBidiCharSet fribidiCharset = FRIBIDI_CHAR_SET_UTF8;	
		
	// tell bidi that we need bidirectionnel
	FriBidiCharType Base = FRIBIDI_TYPE_LTR;
		
	// our buffer
	FriBidiChar *Logical = (FriBidiChar *)malloc(sizeof(FriBidiChar)*(len + 1)) ;
	FriBidiChar *Visual = (FriBidiChar *)malloc(sizeof(FriBidiChar)*(len + 1)) ;
		
	if(!Visual)
	{
		free(Visual);
		return text;
	}
		
	// convert from the selected charset to Unicode (logical)
	int RtlLen = fribidi_charset_to_unicode(fribidiCharset, const_cast<char *>(text), len, Logical);
	//char *Rtl = NULL;
	
	// logical to visual
	if (fribidi_log2vis(Logical, len, &Base, Visual, NULL, NULL, NULL)) 
	{
		// removes bidirectional marks
		//fribidi_remove_bidi_marks(Visual, RtlLen, NULL, NULL, NULL);
			
		//Rtl = (char *)malloc(sizeof(char)*(RtlLen * 4 + 1));
			
		// convert back from Unicode to the charset
		fribidi_unicode_to_charset(fribidiCharset, Visual, RtlLen, Rtl);
	}
		
	free(Logical);
	free(Visual);
	
	return Rtl;
}
#endif

Code: Alles auswählen

void Font::RenderString(int x, int y, const int width, const char *text, const unsigned char color, const int boxheight, const bool utf8_encoded)
{
	if (!frameBuffer->getActive())
		return;

	pthread_mutex_lock( &renderer->render_mutex );
	
	// fribidi
#if defined (ENABLE_FRIBIDI)	
	std::string Text = fribidiShapeChar(text);
	text = Text.c_str();
#endif
...

Code: Alles auswählen

int Font::getRenderWidth(const char *text, const bool utf8_encoded)
{
	pthread_mutex_lock( &renderer->render_mutex );
	
	// fribidi
#if defined (ENABLE_FRIBIDI)	
	std::string Text = fribidiShapeChar(text);
	text = Text.c_str();
#endif
...
mohousch
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Registriert: Mittwoch 14. Dezember 2005, 03:25

Re: neutrino arabic/hebrew font support

Beitrag von mohousch »

* push up *

BTW:
if someone is interessted and able to translate/write arabic/hebrew local please contact me
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