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/* Pango
* shape.c: Convert characters into glyphs.
*
* Copyright (C) 1999 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <pango/pango-glyph.h>
#include <pango/pango-engine.h>
/**
* pango_shape:
* @text: the text to process
* @length: the length (in bytes) of @text
* @analysis: #PangoAnalysis structure from PangoItemize
* @glyphs: glyph string in which to store results
*
* Given a segment of text and the corresponding
* #PangoAnalysis structure returned from pango_itemize(),
* convert the characters into glyphs. You may also pass
* in only a substring of the item from pango_itemize().
*/
void
pango_shape (const gchar *text,
gint length,
PangoAnalysis *analysis,
PangoGlyphString *glyphs)
{
int i;
int last_cluster = -1;
if (analysis->shape_engine)
analysis->shape_engine->script_shape (analysis->font, text, length, analysis, glyphs);
else
{
pango_glyph_string_set_size (glyphs, 1);
glyphs->glyphs[0].glyph = 0;
glyphs->glyphs[0].geometry.x_offset = 0;
glyphs->glyphs[0].geometry.y_offset = 0;
glyphs->glyphs[0].geometry.width = 0;
glyphs->log_clusters[0] = 0;
}
/* Set glyphs[i].attr.is_cluster_start based on log_clusters[]
*/
for (i = 0; i < glyphs->num_glyphs; i++)
{
if (glyphs->log_clusters[i] != last_cluster)
{
glyphs->glyphs[i].attr.is_cluster_start = TRUE;
last_cluster = glyphs->log_clusters[i];
}
else
glyphs->glyphs[i].attr.is_cluster_start = FALSE;
}
g_assert (glyphs->num_glyphs > 0);
}
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