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/* Pango
* basic-atsui.c
*
* Copyright (C) 2005 Imendio AB
*
* 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 "config.h"
#include <glib.h>
#include <string.h>
#include <Carbon/Carbon.h>
#include "pango-engine.h"
#include "pango-utils.h"
#include "pango-fontmap.h"
#include "pangoatsui.h"
/* No extra fields needed */
typedef PangoEngineShape BasicEngineATSUI;
typedef PangoEngineShapeClass BasicEngineATSUIClass ;
#define SCRIPT_ENGINE_NAME "BasicScriptEngineATSUI"
#define RENDER_TYPE PANGO_RENDER_TYPE_ATSUI
static PangoEngineScriptInfo basic_scripts[] = {
{ PANGO_SCRIPT_COMMON, "" }
};
static PangoEngineInfo script_engines[] = {
{
SCRIPT_ENGINE_NAME,
PANGO_ENGINE_TYPE_SHAPE,
RENDER_TYPE,
basic_scripts, G_N_ELEMENTS(basic_scripts)
}
};
static void
set_glyph (PangoFont *font,
PangoGlyphString *glyphs,
int i,
int offset,
PangoGlyph glyph)
{
PangoRectangle logical_rect;
glyphs->glyphs[i].glyph = G_UNLIKELY (glyph == kATSDeletedGlyphcode) ?
PANGO_GLYPH_EMPTY : glyph;
glyphs->glyphs[i].geometry.x_offset = 0;
glyphs->glyphs[i].geometry.y_offset = 0;
glyphs->log_clusters[i] = offset;
pango_font_get_glyph_extents (font, glyphs->glyphs[i].glyph, NULL, &logical_rect);
glyphs->glyphs[i].geometry.width = logical_rect.width;
}
static void
basic_engine_shape (PangoEngineShape *engine,
PangoFont *font,
const char *text,
gint length,
const PangoAnalysis *analysis,
PangoGlyphString *glyphs)
{
gunichar2 *utf16;
long n16;
ATSUTextLayout text_layout;
ATSLayoutRecord *layout_records;
OSStatus err;
ItemCount glyph_count;
int i;
const char *p;
PangoATSUIFont *afont = PANGO_ATSUI_FONT (font);
ATSUStyle style;
CGFontRef fontID;
ATSUAttributeTag styleTags[] = { kATSUFontTag };
ATSUAttributeValuePtr styleValues[] = { &fontID };
ByteCount styleSizes[] = { sizeof (CGFontRef) };
utf16 = g_utf8_to_utf16 (text, length, NULL, &n16, NULL);
err = ATSUCreateTextLayout (&text_layout);
err = ATSUSetTextPointerLocation (text_layout, utf16, 0, n16, n16);
err = ATSUCreateStyle(&style);
fontID = pango_atsui_font_get_cgfont (afont);
err = ATSUSetAttributes(style,
sizeof(styleTags) / sizeof(styleTags[0]),
styleTags, styleSizes, styleValues);
err = ATSUSetRunStyle(text_layout,
style, kATSUFromTextBeginning, kATSUToTextEnd);
err = ATSUDirectGetLayoutDataArrayPtrFromTextLayout (text_layout, 0,
kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
(void *)&layout_records,
&glyph_count);
p = text;
pango_glyph_string_set_size (glyphs, glyph_count - 1);
for (i = 0; i < glyph_count - 1; i++)
{
gunichar wc;
gunichar mirrored_ch;
wc = g_utf8_get_char (p);
if (analysis->level % 2)
if (pango_get_mirror_char (wc, &mirrored_ch))
wc = mirrored_ch;
if (wc == 0xa0) /* non-break-space */
wc = 0x20;
if (pango_is_zero_width (wc))
{
set_glyph (font, glyphs, i, p - text, PANGO_GLYPH_EMPTY);
}
else
{
set_glyph (font, glyphs, i, p - text, layout_records[i].glyphID);
if (g_unichar_type (wc) == G_UNICODE_NON_SPACING_MARK)
{
if (i > 0)
{
PangoRectangle logical_rect, ink_rect;
glyphs->glyphs[i].geometry.width = MAX (glyphs->glyphs[i-1].geometry.width,
glyphs->glyphs[i].geometry.width);
glyphs->glyphs[i-1].geometry.width = 0;
glyphs->log_clusters[i] = glyphs->log_clusters[i-1];
/* Some heuristics to try to guess how overstrike glyphs are
* done and compensate
*/
pango_font_get_glyph_extents (font, glyphs->glyphs[i].glyph, &ink_rect, &logical_rect);
if (logical_rect.width == 0 && ink_rect.x == 0)
glyphs->glyphs[i].geometry.x_offset = (glyphs->glyphs[i].geometry.width - ink_rect.width) / 2;
}
}
}
p = g_utf8_next_char (p);
}
ATSUDirectReleaseLayoutDataArrayPtr (NULL, kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
(void *)&layout_records);
ATSUDisposeStyle (style);
ATSUDisposeTextLayout (text_layout);
g_free (utf16);
}
static void
basic_engine_atsui_class_init (PangoEngineShapeClass *class)
{
class->script_shape = basic_engine_shape;
}
PANGO_ENGINE_SHAPE_DEFINE_TYPE (BasicEngineATSUI, basic_engine_atsui,
basic_engine_atsui_class_init, NULL);
void
PANGO_MODULE_ENTRY(init) (GTypeModule *module)
{
basic_engine_atsui_register_type (module);
}
void
PANGO_MODULE_ENTRY(exit) (void)
{
}
void
PANGO_MODULE_ENTRY(list) (PangoEngineInfo **engines,
int *n_engines)
{
*engines = script_engines;
*n_engines = G_N_ELEMENTS (script_engines);
}
PangoEngine *
PANGO_MODULE_ENTRY(create) (const char *id)
{
if (!strcmp (id, SCRIPT_ENGINE_NAME))
return g_object_new (basic_engine_atsui_type, NULL);
else
return NULL;
}
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