1 /* 2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. 3 * Copyright (C) 2006 Michael Emmel mike.emmel (at) gmail.com 4 * Copyright (C) 2007 Alp Toker <alp.toker (at) 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 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 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
