| /* |
| * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
| * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com |
| * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk> |
| * Copyright (C) 2007 Holger Hans Peter Freyther |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "FontData.h" |
| |
| #include "FloatRect.h" |
| #include "Font.h" |
| #include "FontCache.h" |
| #include "FontDescription.h" |
| #include "GlyphBuffer.h" |
| #include <cairo.h> |
| #include <unicode/uchar.h> |
| #include <unicode/unorm.h> |
| #include <wtf/MathExtras.h> |
| |
| namespace WebCore { |
| |
| void FontData::platformInit() |
| { |
| cairo_font_extents_t font_extents; |
| cairo_text_extents_t text_extents; |
| cairo_scaled_font_extents(m_font.m_scaledFont, &font_extents); |
| m_ascent = static_cast<int>(font_extents.ascent); |
| m_descent = static_cast<int>(font_extents.descent); |
| m_lineSpacing = static_cast<int>(font_extents.height); |
| cairo_scaled_font_text_extents(m_font.m_scaledFont, "x", &text_extents); |
| m_xHeight = text_extents.height; |
| cairo_scaled_font_text_extents(m_font.m_scaledFont, " ", &text_extents); |
| m_spaceWidth = static_cast<int>(text_extents.x_advance); |
| m_lineGap = m_lineSpacing - m_ascent - m_descent; |
| } |
| |
| void FontData::platformDestroy() |
| { |
| if (m_font.m_pattern && ((FcPattern*)-1 != m_font.m_pattern)) |
| FcPatternDestroy(m_font.m_pattern); |
| |
| if (m_font.m_scaledFont) |
| cairo_scaled_font_destroy(m_font.m_scaledFont); |
| delete m_smallCapsFontData; |
| } |
| |
| FontData* FontData::smallCapsFontData(const FontDescription& fontDescription) const |
| { |
| if (!m_smallCapsFontData) { |
| FontDescription desc = FontDescription(fontDescription); |
| desc.setSpecifiedSize(0.70f*fontDescription.computedSize()); |
| const FontPlatformData* pdata = new FontPlatformData(desc, desc.family().family()); |
| m_smallCapsFontData = new FontData(*pdata); |
| } |
| return m_smallCapsFontData; |
| } |
| |
| bool FontData::containsCharacters(const UChar* characters, int length) const |
| { |
| FT_Face face = cairo_ft_scaled_font_lock_face(m_font.m_scaledFont); |
| |
| if (!face) |
| return false; |
| |
| for (unsigned i = 0; i < length; i++) { |
| if (FcFreeTypeCharIndex(face, characters[i]) == 0) { |
| cairo_ft_scaled_font_unlock_face(m_font.m_scaledFont); |
| return false; |
| } |
| } |
| |
| cairo_ft_scaled_font_unlock_face(m_font.m_scaledFont); |
| |
| return true; |
| } |
| |
| void FontData::determinePitch() |
| { |
| m_treatAsFixedPitch = m_font.isFixedPitch(); |
| } |
| |
| float FontData::platformWidthForGlyph(Glyph glyph) const |
| { |
| ASSERT(m_font.m_scaledFont); |
| |
| cairo_glyph_t cglyph = { glyph, 0, 0 }; |
| cairo_text_extents_t extents; |
| cairo_scaled_font_glyph_extents(m_font.m_scaledFont, &cglyph, 1, &extents); |
| |
| float w = (float)m_spaceWidth; |
| if (cairo_scaled_font_status(m_font.m_scaledFont) == CAIRO_STATUS_SUCCESS && extents.x_advance != 0) |
| w = (float)extents.x_advance; |
| return w; |
| } |
| |
| void FontData::setFont(cairo_t* cr) const |
| { |
| ASSERT(cr); |
| m_font.setFont(cr); |
| } |
| |
| } |