Re: preventing wrapping on certain words only
From: Behdad Esfahbod Sent: Friday, May 06, 2011 10:01 PM On 05/06/11 10:07, Ellié Computing Open Source Program wrote: Hello, 1. I’ve been investigating the Pango API, but could not find a way to prevent wrapping for specific portions of text. I saw the global wrapping option WRAP_WORD / WRAP_CHAR / WRAP_WORD_CHAR using pango_layout_set_wrap ( ). How should I do this? The idea behind this is to be sure that a text such as “(...)“ (could be as well “/* ... */”) does not get wrapped. Not quite possible right now. 2. Another question, how would I add a place holder for an image so that I could do something like: hello img width=50 height=10! in logic and determine where the image should be? Can I obtain that from Pango or should I use something else? more powerful on top of it? Checkout pango/examples/cairoshape.c I believe that using that shape technic it should be possible to first render the 'no-wrap' section then make it a 'shape' in the normal text, not feasible in general but for very simple texts it could work. Of course having a no-wrap attribute would be way more practical :) Regards Armel ___ gtk-i18n-list mailing list gtk-i18n-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-i18n-list
Re: preventing wrapping on certain words only
Couldn't this be done by changing all spaces to NO-BREAK SPACE (U+00A0) in the section that should not be wrapped? But perhaps, you still have the problem of hyphenation. Does pango honor ZERO WIDTH NO-BREAK SPACE (U+FEFF)? Could you sandwich that between all characters of the section to prevent hyphenation? Regards, Dov On Mon, May 9, 2011 at 11:07, Ellié Computing Open Source Program opensou...@elliecomputing.com wrote: From: Behdad Esfahbod Sent: Friday, May 06, 2011 10:01 PM On 05/06/11 10:07, Ellié Computing Open Source Program wrote: Hello, 1. I’ve been investigating the Pango API, but could not find a way to prevent wrapping for specific portions of text. I saw the global wrapping option WRAP_WORD / WRAP_CHAR / WRAP_WORD_CHAR using pango_layout_set_wrap ( ). How should I do this? The idea behind this is to be sure that a text such as “(...)“ (could be as well “/* ... */”) does not get wrapped. Not quite possible right now. 2. Another question, how would I add a place holder for an image so that I could do something like: hello img width=50 height=10! in logic and determine where the image should be? Can I obtain that from Pango or should I use something else? more powerful on top of it? Checkout pango/examples/cairoshape.c I believe that using that shape technic it should be possible to first render the 'no-wrap' section then make it a 'shape' in the normal text, not feasible in general but for very simple texts it could work. Of course having a no-wrap attribute would be way more practical :) Regards Armel ___ gtk-i18n-list mailing list gtk-i18n-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-i18n-list ___ gtk-i18n-list mailing list gtk-i18n-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-i18n-list
Re: Drawing glyph bounding box on rendered text?
Behdad posted a python application that draws lines around clusters,
runs, and lines:
http://mail.gnome.org/archives/gtk-i18n-list/2011-April/msg7.html
Maybe you haven't seen that yet and can help.
best -august.
Hi all,
I'm trying to accurately draw a rectangle around each glyph (not
character) in rendered text. I'm very close but things aren't quite
lining up correctly. I've attached an image showing this, but if the
mailing list filters it, you can also see it here:
http://www.phonething.com/test.png
Green box shows line extents, red boxes should show bounding box for
each glyph.
As you can see, widths and X starting positions of the boxes are off
slightly. (So is height, but I suppose I could lock that to the
bottom of the line extents?)
Relevant code that drew that is:
double pango_to_ink = (1.0 / ((double) PANGO_SCALE)); // utility
[ create surface, context, layout, then do pango_layout_set_text() ]
[ for each line in layout use pango_layout_iter_get_line() : ]
pango_layout_iter_get_line_extents(pIter, line_r, NULL);
pangolineX = pango_to_ink * ((double) line_r.x); // start position
of this line of the layout
pangolineY = pango_to_ink * ((double) line_r.y);
[ get each run in current line: ]
for (i = 0; i pRun-glyphs-num_glyphs; i++) // loop through
glyphs in current run
{
pango_font_get_glyph_extents(font, glyphID, NULL, glyphbox);
// Just to get glyph height as it's not in the geometry
glyphX = pangolineX + pango_to_ink * ((double)
pRun-glyphs-glyphs[i].geometry.x_offset);
glyphY = pangolineY + pango_to_ink * ((double)
pRun-glyphs-glyphs[i].geometry.y_offset);
glyphW = pango_to_ink * ((double)
pRun-glyphs-glyphs[i].geometry.width);
glyphH = pango_to_ink * ((double) glyphbox.height);
cairo_rectangle(context, glyphX, glyphY, glyphW, glyphH - glyphY);
cairo_stroke(context);
}
Where am I going wrong in getting the glyph bounding boxes
accurately? (this needs to also work for Indic, Hebrew, Arabic,
Chinese and so on)
It doesn't matter if the box has empty space, i.e. incorporates the
distance between glyphs, though knowing the actual glyph bounding
box AND the space separating it from the next glyph
would be ideal.
Thanks and regards,
Alex
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Re: Drawing glyph bounding box on rendered text?
Whoops sorry. Fired that off without noticing he sent that code to you originally. I go back into lurker mode. Appologies. Behdad posted a python application that draws lines around clusters, runs, and lines: http://mail.gnome.org/archives/gtk-i18n-list/2011-April/msg7.html Maybe you haven't seen that yet and can help. best -august. ___ gtk-i18n-list mailing list gtk-i18n-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-i18n-list
