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/*
* Copyright (C) 2006, 2009, 2011 Apple Inc. All rights reserved.
* Copyright (C) 2007-2008 Torch Mobile Inc.
*
* 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.
*/
#ifndef GlyphBuffer_h
#define GlyphBuffer_h
#include "FloatSize.h"
#include <wtf/UnusedParam.h>
#include <wtf/Vector.h>
#if USE(CG) || (PLATFORM(WX) && OS(DARWIN)) || USE(SKIA_ON_MAC_CHROME)
#include <ApplicationServices/ApplicationServices.h>
#endif
#if USE(CAIRO) || (PLATFORM(WX) && defined(__WXGTK__))
#include <cairo.h>
#endif
namespace WebCore {
typedef unsigned short Glyph;
class SimpleFontData;
#if USE(CAIRO)
// FIXME: Why does Cairo use such a huge struct instead of just an offset into an array?
typedef cairo_glyph_t GlyphBufferGlyph;
#elif OS(WINCE)
typedef wchar_t GlyphBufferGlyph;
#else
typedef Glyph GlyphBufferGlyph;
#endif
// CG uses CGSize instead of FloatSize so that the result of advances()
// can be passed directly to CGContextShowGlyphsWithAdvances in FontMac.mm
#if USE(CG) || (PLATFORM(WX) && OS(DARWIN)) || USE(SKIA_ON_MAC_CHROME)
typedef CGSize GlyphBufferAdvance;
#elif OS(WINCE)
// There is no cross-platform code that uses the height of GlyphBufferAdvance,
// so we can save memory space on embedded devices by storing only the width
typedef float GlyphBufferAdvance;
#else
typedef FloatSize GlyphBufferAdvance;
#endif
class GlyphBuffer {
public:
bool isEmpty() const { return m_fontData.isEmpty(); }
int size() const { return m_fontData.size(); }
void clear()
{
m_fontData.clear();
m_glyphs.clear();
m_advances.clear();
#if PLATFORM(WIN)
m_offsets.clear();
#endif
}
GlyphBufferGlyph* glyphs(int from) { return m_glyphs.data() + from; }
GlyphBufferAdvance* advances(int from) { return m_advances.data() + from; }
const GlyphBufferGlyph* glyphs(int from) const { return m_glyphs.data() + from; }
const GlyphBufferAdvance* advances(int from) const { return m_advances.data() + from; }
const SimpleFontData* fontDataAt(int index) const { return m_fontData[index]; }
void swap(int index1, int index2)
{
const SimpleFontData* f = m_fontData[index1];
m_fontData[index1] = m_fontData[index2];
m_fontData[index2] = f;
GlyphBufferGlyph g = m_glyphs[index1];
m_glyphs[index1] = m_glyphs[index2];
m_glyphs[index2] = g;
GlyphBufferAdvance s = m_advances[index1];
m_advances[index1] = m_advances[index2];
m_advances[index2] = s;
#if PLATFORM(WIN)
FloatSize offset = m_offsets[index1];
m_offsets[index1] = m_offsets[index2];
m_offsets[index2] = offset;
#endif
}
Glyph glyphAt(int index) const
{
#if USE(CAIRO)
return m_glyphs[index].index;
#else
return m_glyphs[index];
#endif
}
float advanceAt(int index) const
{
#if USE(CG) || (PLATFORM(WX) && OS(DARWIN)) || USE(SKIA_ON_MAC_CHROME)
return m_advances[index].width;
#elif OS(WINCE)
return m_advances[index];
#else
return m_advances[index].width();
#endif
}
FloatSize offsetAt(int index) const
{
#if PLATFORM(WIN)
return m_offsets[index];
#else
UNUSED_PARAM(index);
return FloatSize();
#endif
}
void add(Glyph glyph, const SimpleFontData* font, float width, const FloatSize* offset = 0)
{
m_fontData.append(font);
#if USE(CAIRO)
cairo_glyph_t cairoGlyph;
cairoGlyph.index = glyph;
m_glyphs.append(cairoGlyph);
#else
m_glyphs.append(glyph);
#endif
#if USE(CG) || (PLATFORM(WX) && OS(DARWIN)) || USE(SKIA_ON_MAC_CHROME)
CGSize advance = { width, 0 };
m_advances.append(advance);
#elif OS(WINCE)
m_advances.append(width);
#else
m_advances.append(FloatSize(width, 0));
#endif
#if PLATFORM(WIN)
if (offset)
m_offsets.append(*offset);
else
m_offsets.append(FloatSize());
#else
UNUSED_PARAM(offset);
#endif
}
#if !OS(WINCE)
void add(Glyph glyph, const SimpleFontData* font, GlyphBufferAdvance advance)
{
m_fontData.append(font);
#if USE(CAIRO)
cairo_glyph_t cairoGlyph;
cairoGlyph.index = glyph;
m_glyphs.append(cairoGlyph);
#else
m_glyphs.append(glyph);
#endif
m_advances.append(advance);
}
#endif
void expandLastAdvance(float width)
{
ASSERT(!isEmpty());
GlyphBufferAdvance& lastAdvance = m_advances.last();
#if USE(CG) || (PLATFORM(WX) && OS(DARWIN)) || USE(SKIA_ON_MAC_CHROME)
lastAdvance.width += width;
#elif OS(WINCE)
lastAdvance += width;
#else
lastAdvance += FloatSize(width, 0);
#endif
}
private:
Vector<const SimpleFontData*, 2048> m_fontData;
Vector<GlyphBufferGlyph, 2048> m_glyphs;
Vector<GlyphBufferAdvance, 2048> m_advances;
#if PLATFORM(WIN)
Vector<FloatSize, 2048> m_offsets;
#endif
};
}
#endif
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