Re: Rendering Arabic text with Pango & Cairo VS Pango & FreeType
- From: Behdad Esfahbod <behdad behdad org>
- To: Nicolas Lacombe <n lacombe gmail com>
- Cc: gtk-i18n-list gnome org
- Subject: Re: Rendering Arabic text with Pango & Cairo VS Pango & FreeType
- Date: Wed, 02 Dec 2009 14:35:15 -0500
The font looks fine. Any chance pango can't find it's arabic module? Tor, do
you compile the basic module in?
behdad
On 12/02/2009 03:54 AM, Nicolas Lacombe wrote:
Output of fc-match -v ':lang=ar' :
Pattern has 32 elts (size 48)
family: "Andalus"(s)
familylang: "en"(s)
style: "Regular"(s)
stylelang: "en"(s)
fullname: "Andalus"(s)
fullnamelang: "en"(s)
slant: 0(i)(s)
weight: 80(i)(s)
width: 100(i)(s)
size: 12(f)(s)
pixelsize: 12.5(f)(s)
foundry: "unknown"(s)
antialias: FcTrue(w)
hintstyle: 3(i)(w)
hinting: FcTrue(w)
verticallayout: FcFalse(s)
autohint: FcFalse(s)
globaladvance: FcTrue(s)
file: "C:/WINDOWS/fonts/andlso.ttf"(s)
index: 0(i)(s)
outline: FcTrue(s)
scalable: FcTrue(s)
dpi: 75(f)(s)
rgba: 1(i)(w)
scale: 1(f)(s)
charset:
0000: 00000000 ffffffff ffffffff ffffffff 00000000 ffffffff
ffffffff ffffffff
0001: 00000000 00020000 000c0000 61000003 00040000 00000000
00000000 00000000
0002: 00000000 00000000 00000000 00000000 00000000 00000000
3c0000c0 00000000
0003: 00000000 00000000 00000000 00000000 00000000 00000200
00000001 00000000
0006: 88001000 07fffffe 0037ffff 401327ff 01000040 00008210
00201000 03ff0010
0020: 7718f000 06010047 00000010 00000000 00000000 00001000
00000000 00000000
0021: 00000000 00000004 00000000 00000000 00000000 00000000
00000000 00000000
0022: 44028044 00000800 00000100 00000031 00000000 00000000
00000000 00000000
0025: 00000000 00000000 00000000 00000000 00000000 00000000
00001400 00000000
00f8: 00000000 00000000 00000000 00000000 00000000 00000000
00000000 80000000
00fb: 00000006 00000000 03c30000 3c003c00 003fcc00 00000000
00000000 30000100
00fc: 00000000 00000000 c0000000 00000007 00000000 00000000
00000000 001c0000
00fd: 00000000 f0000000 00000000 00000000 00000000 00000000
00000000 10040000
00fe: 00000000 00000000 00000000 ffd70000 ffffffff ffffffff
ffffffff 9fffffff
(s)
lang:
aa|ar|ast|ay|az-ir|bi|br|ch|co|da|de|en|es|et|eu|fa|fi|fj|fo|fr|fur|fy|gd|gl|gv|ho|ia|id|ie|io|is|it|lb|mg|nb|nds|nl|nn|no|nr|nso|oc|om|pt|rm|sma|smj|so|sq|ss|st|sv|sw|tl|tn|ts|ug|uz|vo|vot|wa|xh|yap|zu|an|fil|ht|jv|kj|kwm|li|ms|ng|pap-an|pap-aw|rn|rw|sc|sg|sn|su|za(s)
fontversion: 387973(i)(s)
capability: "otlayout:arab otlayout:latn"(s)
fontformat: "TrueType"(s)
embeddedbitmap: FcTrue(s)
decorative: FcFalse(s)
2009/12/1 Behdad Esfahbod <behdad behdad org <mailto:behdad behdad org>>
Seems to me like your fontconfig can't find any decent Arabic fonts.
Try running fc-match ':lang=ar' and see what you get...
behdad
On 12/01/2009 03:29 AM, Nicolas Lacombe wrote:
Of course, sorry about that.
I'm running pango on windows (with MSVC), using the binaries
provided by
GTK+ (http://www.gtk.org/download-windows.html).
For the pango viewer, I just created a small visual studio
project to
see how it work, link it statically with the GTK+ binaries and
run it.
Pangocairo work as intended whereas pangoft2 does not interpret
results.
2009/12/1 Behdad Esfahbod <behdad behdad org
<mailto:behdad behdad org> <mailto:behdad behdad org
<mailto:behdad behdad org>>>
You can at least tell us about your build environment?!!
On 12/01/2009 02:09 AM, Nicolas Lacombe wrote:
Thx for your answear.
I don't know wich fonts are using the pagocairo
backend... how can I
know this informations?
I tested the pango viewer included in the source under
windows
yesterday, and the pangoft2 test gave me wrong results
again, so it
looks like I'm not doing anything wrong in my code.
Problem is I really need to use freetype, so I guess
I'll have
to write
the arabic module myself.
Nico.
2009/11/30 Behdad Esfahbod <behdad behdad org
<mailto:behdad behdad org>
<mailto:behdad behdad org <mailto:behdad behdad org>>
<mailto:behdad behdad org <mailto:behdad behdad org>
<mailto:behdad behdad org <mailto:behdad behdad org>>>>
Hi,
I'm not sure why it doesn't work for you. Is the
pangocairo
backend
using FreeType fonts or win32? At any rate, the
pangoft2
backend
has been deprecated for years. I suggest you use
pangocairo
instead.
behdad
On 11/30/2009 09:48 AM, Nicolas Lacombe wrote:
Hi,
I want to use Pango high level functionnality to
render
arabic
tex in a
FreeType environnement.
Using Pango with Cairo, it works perfectly, the
text is
correctly
rendered with ligatures typographic ligature.
However, in a freetype environnement, ligature
disapear!
I can
still see
the text, but only the original form of each
glyph, thus
without any
contextual interpretation.
Am I doing anything wrong?
PANGO & CAIRO RENDERING (WORKING AS INTENDED)
cairo_surface_t *surface;
cairo_t *cr;
PangoLayout *layout;
surface =
cairo_image_surface_create(CAIRO_FORMAT_A8,
512, 512);
cr = cairo_create(surface);
cairo_set_source_rgba(cr, 1., 1., 1., 0.0);
cairo_paint(cr);
layout = pango_cairo_create_layout(cr);
PangoFontDescription *desc;
desc =
pango_font_description_from_string("Arial, 20");
pango_layout_set_font_description (layout, desc);
pango_font_description_free(desc);
pango_layout_set_text(layout, txt, -1);
cairo_set_line_width(cr, 0.5);
cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
pango_cairo_update_layout(cr, layout);
pango_cairo_show_layout(cr, layout);
PANGO & FREETYPE RENDERING (no contextual
analysis of
the arabic
text)
PangoContext *context;
PangoFontMap* PFM = pango_ft2_font_map_new();
pango_ft2_font_map_set_resolution(PANGO_FT2_FONT_MAP(PFM),
width, height);
context =
pango_font_map_create_context(PANGO_FONT_MAP(PFM));
FT_Bitmap* bm;
bm = g_slice_new(FT_Bitmap);
bm->rows = height;
bm->width = width;
bm->pitch = width;
bm->num_grays = 256;
bm->pixel_mode = FT_PIXEL_MODE_GRAY;
bm->buffer = (unsigned char*)g_malloc (bm->pitch *
bm->rows);
memset(bm->buffer, 0x00, bm->pitch * bm->rows);
layout = pango_layout_new(context);
static PangoFontDescription *desc;
desc =
pango_font_description_from_string("Arial, 20");
pango_layout_set_font_description(layout, desc);
pango_font_description_free(desc);
pango_layout_set_auto_dir (layout, 1);
pango_layout_set_text(layout, txt, -1);
pango_layout_context_changed(layout);
pango_ft2_render_layout(bm, layout, 0, 0);
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