1 /*
2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
3 * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
4 * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk>
5 * Copyright (C) 2007 Pioneer Research Center USA, Inc.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
17 * its contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
21 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "config.h"
33 #include "GlyphPageTreeNode.h"
34
35 #include "SimpleFontData.h"
36 #include <pango/pango-font.h>
37
38 namespace WebCore {
39
pango_font_get_glyph(PangoFont * font,PangoContext * context,gunichar wc)40 static PangoGlyph pango_font_get_glyph(PangoFont* font, PangoContext* context, gunichar wc)
41 {
42 PangoGlyph result = 0;
43 gchar buffer[7];
44
45 gint length = g_unichar_to_utf8(wc, buffer);
46 g_return_val_if_fail(length, 0);
47
48 GList* items = pango_itemize(context, buffer, 0, length, NULL, NULL);
49
50 if (g_list_length(items) == 1) {
51 PangoItem* item = reinterpret_cast<PangoItem*>(items->data);
52 PangoFont* tmpFont = item->analysis.font;
53 item->analysis.font = font;
54
55 PangoGlyphString* glyphs = pango_glyph_string_new();
56 pango_shape(buffer, length, &item->analysis, glyphs);
57
58 item->analysis.font = tmpFont;
59
60 if (glyphs->num_glyphs == 1)
61 result = glyphs->glyphs[0].glyph;
62 else
63 g_warning("didn't get 1 glyph but %d", glyphs->num_glyphs);
64
65 pango_glyph_string_free(glyphs);
66 }
67
68 g_list_foreach(items, (GFunc)pango_item_free, NULL);
69 g_list_free(items);
70
71 return result;
72 }
73
fill(unsigned offset,unsigned length,UChar * buffer,unsigned bufferLength,const SimpleFontData * fontData)74 bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
75 {
76 // The bufferLength will be greater than the glyph page size if the buffer has Unicode supplementary characters.
77 // We won't support this for now.
78 if (bufferLength > GlyphPage::size)
79 return false;
80
81 if (!fontData->platformData().m_font || fontData->platformData().m_font == reinterpret_cast<PangoFont*>(-1))
82 return false;
83
84 bool haveGlyphs = false;
85 for (unsigned i = 0; i < length; i++) {
86 Glyph glyph = pango_font_get_glyph(fontData->platformData().m_font, fontData->platformData().m_context, buffer[i]);
87 if (!glyph)
88 setGlyphDataForIndex(offset + i, 0, 0);
89 else {
90 setGlyphDataForIndex(offset + i, glyph, fontData);
91 haveGlyphs = true;
92 }
93 }
94
95 return haveGlyphs;
96 }
97
98 }
99