1 files changed, 138 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/freetype/SimpleFontDataFreeType.cpp b/WebCore/platform/graphics/freetype/SimpleFontDataFreeType.cpp
new file mode 100644
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--- /dev/null
+++ b/WebCore/platform/graphics/freetype/SimpleFontDataFreeType.cpp
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+/*
+ * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
+ * Copyright (C) 2007, 2008 Alp Toker <alp@atoker.com>
+ * 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 "SimpleFontData.h"
+
+#include "FloatRect.h"
+#include "Font.h"
+#include "FontCache.h"
+#include "FontDescription.h"
+#include "GlyphBuffer.h"
+#include <cairo-ft.h>
+#include <cairo.h>
+#include <fontconfig/fcfreetype.h>
+#include <wtf/MathExtras.h>
+
+namespace WebCore {
+
+void SimpleFontData::platformInit()
+{
+    cairo_font_extents_t font_extents;
+    cairo_text_extents_t text_extents;
+    cairo_scaled_font_extents(m_platformData.scaledFont(), &font_extents);
+    m_ascent = static_cast<int>(lroundf(font_extents.ascent));
+    m_descent = static_cast<int>(lroundf(font_extents.descent));
+    m_lineSpacing = static_cast<int>(lroundf(font_extents.height));
+    // There seems to be some rounding error in cairo (or in how we
+    // use cairo) with some fonts, like DejaVu Sans Mono, which makes
+    // cairo report a height smaller than ascent + descent, which is
+    // wrong and confuses WebCore's layout system. Workaround this
+    // while we figure out what's going on.
+    if (m_lineSpacing < m_ascent + m_descent)
+        m_lineSpacing = m_ascent + m_descent;
+    cairo_scaled_font_text_extents(m_platformData.scaledFont(), "x", &text_extents);
+    m_xHeight = text_extents.height;
+    cairo_scaled_font_text_extents(m_platformData.scaledFont(), " ", &text_extents);
+    m_spaceWidth = static_cast<float>(text_extents.x_advance);
+    m_lineGap = m_lineSpacing - m_ascent - m_descent;
+    m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f;
+}
+
+void SimpleFontData::platformCharWidthInit()
+{
+    m_avgCharWidth = 0.f;
+    m_maxCharWidth = 0.f;
+    initCharWidths();
+}
+
+void SimpleFontData::platformDestroy()
+{
+}
+
+SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const
+{
+    // FIXME: I think we want to ask FontConfig for the right font again.
+    if (!m_smallCapsFontData)
+        m_smallCapsFontData = new SimpleFontData(
+            FontPlatformData(cairo_scaled_font_get_font_face(m_platformData.scaledFont()),
+            0.70f * fontDescription.computedSize(), m_platformData.syntheticBold(), m_platformData.syntheticOblique()),
+            isCustomFont(), false);
+
+    return m_smallCapsFontData;
+}
+
+bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
+{
+    FT_Face face = cairo_ft_scaled_font_lock_face(m_platformData.scaledFont());
+
+    if (!face)
+        return false;
+
+    for (int i = 0; i < length; i++) {
+        if (FcFreeTypeCharIndex(face, characters[i]) == 0) {
+            cairo_ft_scaled_font_unlock_face(m_platformData.scaledFont());
+            return false;
+        }
+    }
+
+    cairo_ft_scaled_font_unlock_face(m_platformData.scaledFont());
+
+    return true;
+}
+
+void SimpleFontData::determinePitch()
+{
+    m_treatAsFixedPitch = m_platformData.isFixedPitch();
+}
+
+FloatRect SimpleFontData::platformBoundsForGlyph(Glyph) const
+{
+    return FloatRect();
+}
+
+float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
+{
+    ASSERT(m_platformData.scaledFont());
+
+    cairo_glyph_t cglyph = { glyph, 0, 0 };
+    cairo_text_extents_t extents;
+    cairo_scaled_font_glyph_extents(m_platformData.scaledFont(), &cglyph, 1, &extents);
+
+    float w = (float)m_spaceWidth;
+    if (cairo_scaled_font_status(m_platformData.scaledFont()) == CAIRO_STATUS_SUCCESS && extents.x_advance)
+        w = (float)extents.x_advance;
+
+    return w;    
+}
+
+}