Re: [Dev-C++] text size

[Carlos d. M. <cg...@wo...>]

Abhijit Shylanath escribi=F3:

> Greets, Carlos.
>
> > I want create a bitmap for hold a text string loaded from a file. I h=
ave
> > a fixed width, given by the window, but the height depends on the str=
ing
> > length, but I don't see any function in the win32 reference which cou=
ld
> > be used for achieve it in a simple way. Though in it is claimed that =
the
> > result is width and height GetExtentPoint32 gives the dimensions of t=
he
> > string without considering that it will be displayed in multiple line=
s,
> > so it gives a lpsize which has the cx length of all the characters of
> > the string and the height of a single line. If I try to work with it =
in
> > the simple ways (cy =3D cx /window widht * text height) I get a too s=
hort
>
> I think this should be
>
>     cy =3D (cx / window_width + 1) * text_height
>
> since for cx/window_width =3D=3D 0, there is actually one line already =
(for
> example, 300/400 is 0, but there is one line of width 300 units). You m=
ight
> also want to have a variable for line spacing.
>

Yes, I tried that, but the bitmap result has more than a line of differen=
ce,
there is a text with many newlines, and the bitmap is less than the half =
of the
size needed, although with a new modification I achieved to have in most =
cases
bitmaps which are more than a 15% longer than text. I considered the
tmExternalLeading but it is zero for the font I use (the default).

I got the solution, it is easy but not the most I'd like. I don't know ho=
w I
could not think it, well I know, it sem to me at first as a too tedious w=
ay for
be accepted, but now I am thinking it would be no so. It consists in writ=
e a
function which will know the number of characters per line (I can use the
average widht of the actual string, simply divide cx by strlen), calculat=
e how
many letters will be needed for reach a decent distance from the right en=
d of
the window and substitute the nearest space by a newline (drawtext unders=
tands
\n), so with that and the newlines which are yet in the string I can now
exactly how many lines will have the text.

[Some time after]

I noticed that in the countlines function I wrote \n as newline, but then=
 I
remembered that in windows end of line is \r\n, and each \r, as seen at a
little experiment, makes the next line be spaced one line more, so I chan=
ged
that, \n by \r, and either I considered tabs (I've right now see that I h=
ad to
bother with them), so it returns one line per each \r and per each \t, an=
d
three per each \v, and I added the function that receiving the number of =
chars
per line and the lenght of the string goes over it counting char-per-line=
 so
adding a line each time it reaches a substring between newlines greater t=
han
the charsper-line, and adding more per multiplication of the charperlines
value. Now this works fine for some files (bitmaps with just one or two l=
ines
longer than text), but I still find some which still is the bitmap too sh=
ort,
and one of them is as an html just that the first I tried as example of t=
ext,
it has the same apparent amount of tabs and newlines (note that I use the=
 html
as plain text, I not interpret the tags, they simply stay there <HTML>, e=
tc),
and for it the bitmap is even shorter in proportion than the other of the
special file with great amount of tabs and newlines. Perhaps there is som=
e
spacing character I miss?. \r \n \t \v are what I know or remember. And s=
till I
am adding the tabs twice, and each time I treat them as a newline. I shou=
ld
have too large bitmaps instead of having too short.

Thanks for the help, and sorry for the little stupid question.