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[h a g o]

--- Achim Hasenmueller <address@hidden> wrote:
> 
> Graham,
> 
> thanks for your help. I was not aware of the pitch
> value. However, I still
> don't understand why it fails.
> 
> I am trying to paint an "a" and the FT_Load_Char
> gives me the following
> information:
> 
> bitmap.rows == 59
> bitmap.width == 51
> bitmap.pitch == 51
> bitmap_left == 4
> bitmap_top == 58
> 
> A letter "b" that looks perfect gives me:
> 
> bitmap.rows == 89
> bitmap.width == 60
> bitmap.pitch == 60
> bitmap_left == 0
> bitmap_top == 87
> 
> So pitch is always the width here. Still the a fails
> and b works. The problem
> can only be that the buffer does not match the width
> I pass to my blitting
> routine (bitmap.width). What am I doing wrong here?
> 
> Thanks!
> 
> Kind regards / mit freundlichen Gruessen,
>     Achim Hasenmueller
> 
> InnoTek Systemberatung GmbH
> phon: +49 7151 9965-30
> address@hidden
> http://www.innotek.de
> Germany
> 
> 
> 
> 
> 
> 
> Graham Asher <address@hidden> on 19.02.2001
> 21.16.23
> 
> Please respond to "address@hidden"
> <address@hidden>
> 
> To:   "'Achim Hasenmueller'" <address@hidden>
> cc:   "'address@hidden'" <address@hidden>
> 
> Subject:  RE: [Devel] bitmap rendering
> 
> 
> Achim,
> 
> You need to tell your blitting routine the width of
> the bitmap in bytes, as
> well as in pixels, so it knows how many bytes to
> skip when going from one
> from to the next. This is called the 'stride' or
> 'pitch' and is given by
> 'pitch' in the FT_Bitmap structure.
> 
> The pitch is not necessarily the minimum number of
> bytes that would hold
> the pixels in a row. Sometimes rows are padded to be
> an exact multiple of 2
> or 4 bytes.
> 
> This would explain the distortion of some characters
> and not others; where
> your blitting routine's idea of the pitch happens to
> be right, there is no
> distortion.
> 
> Also, the following code is wrong - but I guess you
> know that, because it
> will not even compile:
> 
> <<<<<<
> char szString[20];
> strcpy(szString, "a");
> error = FT_Load_Char(face, szString,
> FT_LOAD_RENDER);
> >>>>>>
> 
> FT_Load_Char takes not a char* but an integer
> character code as its second
> argument, so this is better:
> 
> error = FT_Load_Char(face, 'a', FT_LOAD_RENDER);
> 
> And don't get me started about Hungarian notation
> ;-) (yeah, I know, it's a
> matter of taste).
> 
> Best regards
> 
> Graham Asher
> 
> 
> 
> 
> 
> 
> 
> 
> _______________________________________________
> Devel mailing list
> address@hidden
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