#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);
assert(m_spaceWidth != 0);
m_lineGap = m_lineSpacing - m_ascent - m_descent;
}
void FontData::platformDestroy()
{
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
{
for (unsigned i = 0; i < length; i++)
if (getGlyphIndex(characters[i]) == 0)
return false;
return true;
}
void FontData::determinePitch()
{
m_treatAsFixedPitch = m_font.isFixedPitch();
}
float FontData::platformWidthForGlyph(Glyph glyph) const
{
cairo_glyph_t cglyph;
cglyph.index = (int)glyph;
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(m_font.m_scaledFont, &cglyph, 1, &extents);
float w = extents.x_advance;
if (w == 0)
w = m_spaceWidth;
return w;
}
void FontData::setFont(cairo_t* cr) const
{
m_font.setFont(cr);
}
}