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/*
* Copyright (C) 2006, 2009, 2011, 2016 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 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.
*/
#pragma once
#include "FloatSize.h"
#include "Glyph.h"
#include <climits>
#include <wtf/Vector.h>
#if USE(CG)
#include <CoreGraphics/CGGeometry.h>
#endif
namespace WebCore {
class Font;
#if USE(WINGDI)
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)
struct GlyphBufferAdvance : CGSize {
public:
GlyphBufferAdvance() : CGSize(CGSizeZero) { }
GlyphBufferAdvance(CGSize size)
: CGSize(size)
{
}
GlyphBufferAdvance(float width, float height)
: CGSize(CGSizeMake(width, height))
{
}
void setWidth(CGFloat width) { this->CGSize::width = width; }
void setHeight(CGFloat height) { this->CGSize::height = height; }
CGFloat width() const { return this->CGSize::width; }
CGFloat height() const { return this->CGSize::height; }
};
#else
typedef FloatSize GlyphBufferAdvance;
#endif
class GlyphBuffer {
public:
bool isEmpty() const { return m_font.isEmpty(); }
unsigned size() const { return m_font.size(); }
void clear()
{
m_font.clear();
m_glyphs.clear();
m_advances.clear();
if (m_offsetsInString)
m_offsetsInString->clear();
}
GlyphBufferGlyph* glyphs(unsigned from) { return m_glyphs.data() + from; }
GlyphBufferAdvance* advances(unsigned from) { return m_advances.data() + from; }
const GlyphBufferGlyph* glyphs(unsigned from) const { return m_glyphs.data() + from; }
const GlyphBufferAdvance* advances(unsigned from) const { return m_advances.data() + from; }
size_t advancesCount() const { return m_advances.size(); }
const Font* fontAt(unsigned index) const { return m_font[index]; }
void setInitialAdvance(GlyphBufferAdvance initialAdvance) { m_initialAdvance = initialAdvance; }
const GlyphBufferAdvance& initialAdvance() const { return m_initialAdvance; }
Glyph glyphAt(unsigned index) const
{
return m_glyphs[index];
}
GlyphBufferAdvance advanceAt(unsigned index) const
{
return m_advances[index];
}
static const unsigned noOffset = UINT_MAX;
void add(Glyph glyph, const Font* font, float width, unsigned offsetInString = noOffset)
{
GlyphBufferAdvance advance;
advance.setWidth(width);
advance.setHeight(0);
add(glyph, font, advance, offsetInString);
}
void add(Glyph glyph, const Font* font, GlyphBufferAdvance advance, unsigned offsetInString)
{
m_font.append(font);
m_glyphs.append(glyph);
m_advances.append(advance);
if (offsetInString != noOffset && m_offsetsInString)
m_offsetsInString->append(offsetInString);
}
void reverse(unsigned from, unsigned length)
{
for (unsigned i = from, end = from + length - 1; i < end; ++i, --end)
swap(i, end);
}
void expandLastAdvance(float width)
{
ASSERT(!isEmpty());
GlyphBufferAdvance& lastAdvance = m_advances.last();
lastAdvance.setWidth(lastAdvance.width() + width);
}
void expandLastAdvance(GlyphBufferAdvance expansion)
{
ASSERT(!isEmpty());
GlyphBufferAdvance& lastAdvance = m_advances.last();
lastAdvance.setWidth(lastAdvance.width() + expansion.width());
lastAdvance.setHeight(lastAdvance.height() + expansion.height());
}
void saveOffsetsInString()
{
m_offsetsInString.reset(new Vector<unsigned, 2048>());
}
int offsetInString(unsigned index) const
{
ASSERT(m_offsetsInString);
return (*m_offsetsInString)[index];
}
void shrink(unsigned truncationPoint)
{
m_font.shrink(truncationPoint);
m_glyphs.shrink(truncationPoint);
m_advances.shrink(truncationPoint);
if (m_offsetsInString)
m_offsetsInString->shrink(truncationPoint);
}
private:
void swap(unsigned index1, unsigned index2)
{
const Font* f = m_font[index1];
m_font[index1] = m_font[index2];
m_font[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;
}
Vector<const Font*, 2048> m_font;
Vector<GlyphBufferGlyph, 2048> m_glyphs;
Vector<GlyphBufferAdvance, 2048> m_advances;
GlyphBufferAdvance m_initialAdvance;
std::unique_ptr<Vector<unsigned, 2048>> m_offsetsInString;
};
}