<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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