#include "config.h"
#include "Font.h"
#include "CharacterNames.h"
#include "FloatRect.h"
#include "FontCache.h"
#include "FontFallbackList.h"
#include "IntPoint.h"
#include "GlyphBuffer.h"
#include "WidthIterator.h"
#include <wtf/MathExtras.h>
#include <wtf/UnusedParam.h>
using namespace WTF;
using namespace Unicode;
namespace WebCore {
#if USE(FONT_FAST_PATH)
const uint8_t Font::gRoundingHackCharacterTable[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1 , 1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 ,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
Font::CodePath Font::s_codePath = Auto;
#endif
Font::Font()
: m_letterSpacing(0)
, m_wordSpacing(0)
, m_isPlatformFont(false)
{
}
Font::Font(const FontDescription& fd, float letterSpacing, float wordSpacing)
: m_fontDescription(fd)
, m_letterSpacing(letterSpacing)
, m_wordSpacing(wordSpacing)
, m_isPlatformFont(false)
{
}
Font::Font(const FontPlatformData& fontData, bool isPrinterFont)
: m_fontList(FontFallbackList::create())
, m_letterSpacing(0)
, m_wordSpacing(0)
, m_isPlatformFont(true)
{
m_fontDescription.setUsePrinterFont(isPrinterFont);
m_fontList->setPlatformFont(fontData);
m_fontDescription.setSpecifiedSize (GSFontGetSize(fontData.font()));
m_fontDescription.setComputedSize (GSFontGetSize(fontData.font()));
m_fontDescription.setItalic (GSFontGetTraits(fontData.font()) & GSItalicFontMask);
m_fontDescription.setWeight ((GSFontGetTraits(fontData.font()) & GSBoldFontMask) ? FontWeightBold : FontWeightNormal);
}
Font::Font(const Font& other)
: m_fontDescription(other.m_fontDescription)
, m_fontList(other.m_fontList)
, m_letterSpacing(other.m_letterSpacing)
, m_wordSpacing(other.m_wordSpacing)
, m_isPlatformFont(other.m_isPlatformFont)
{
}
Font& Font::operator=(const Font& other)
{
m_fontDescription = other.m_fontDescription;
m_fontList = other.m_fontList;
m_letterSpacing = other.m_letterSpacing;
m_wordSpacing = other.m_wordSpacing;
m_isPlatformFont = other.m_isPlatformFont;
return *this;
}
Font::~Font()
{
}
bool Font::operator==(const Font& other) const
{
if ((m_fontList && m_fontList->loadingCustomFonts()) ||
(other.m_fontList && other.m_fontList->loadingCustomFonts()))
return false;
FontSelector* first = m_fontList ? m_fontList->fontSelector() : 0;
FontSelector* second = other.m_fontList ? other.m_fontList->fontSelector() : 0;
return first == second
&& m_fontDescription == other.m_fontDescription
&& m_letterSpacing == other.m_letterSpacing
&& m_wordSpacing == other.m_wordSpacing
&& (m_fontList ? m_fontList->generation() : 0) == (other.m_fontList ? other.m_fontList->generation() : 0);
}
const SimpleFontData* Font::primaryFont() const
{
ASSERT(m_fontList);
return m_fontList->primarySimpleFontData(this);
}
const FontData* Font::fontDataAt(unsigned index) const
{
ASSERT(m_fontList);
return m_fontList->fontDataAt(this, index);
}
const FontData* Font::fontDataForCharacters(const UChar* characters, int length) const
{
ASSERT(m_fontList);
return m_fontList->fontDataForCharacters(this, characters, length);
}
void Font::update(PassRefPtr<FontSelector> fontSelector) const
{
if (!m_fontList)
m_fontList = FontFallbackList::create();
m_fontList->invalidate(fontSelector);
}
bool Font::isFixedPitch() const
{
ASSERT(m_fontList);
return m_fontList->isFixedPitch(this);
}
float Font::drawText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
if (m_fontList && m_fontList->loadingCustomFonts())
return 0.0f;
to = (to == -1 ? run.length() : to);
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont()) {
drawTextUsingSVGFont(context, run, point, from, to);
return 0.0f;
}
#endif
#if USE(FONT_FAST_PATH)
if (canUseGlyphCache(run))
return drawSimpleText(context, run, point, from, to);
#endif
return drawComplexText(context, run, point, from, to);
}
float Font::floatWidth(const TextRun& run, HashSet<const SimpleFontData*>* fallbackFonts) const
{
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont())
return floatWidthUsingSVGFont(run);
#endif
#if USE(FONT_FAST_PATH)
if (canUseGlyphCache(run)) {
static bool returnFallbackFonts = canReturnFallbackFontsForComplexText();
return floatWidthForSimpleText(run, 0, returnFallbackFonts ? fallbackFonts : 0);
}
#endif
return floatWidthForComplexText(run, fallbackFonts);
}
float Font::floatWidth(const TextRun& run, int extraCharsAvailable, int& charsConsumed, String& glyphName) const
{
#if !ENABLE(SVG_FONTS)
UNUSED_PARAM(extraCharsAvailable);
#else
if (primaryFont()->isSVGFont())
return floatWidthUsingSVGFont(run, extraCharsAvailable, charsConsumed, glyphName);
#endif
charsConsumed = run.length();
glyphName = "";
#if USE(FONT_FAST_PATH)
if (canUseGlyphCache(run))
return floatWidthForSimpleText(run, 0);
#endif
return floatWidthForComplexText(run);
}
FloatRect Font::selectionRectForText(const TextRun& run, const IntPoint& point, int h, int from, int to) const
{
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont())
return selectionRectForTextUsingSVGFont(run, point, h, from, to);
#endif
to = (to == -1 ? run.length() : to);
#if USE(FONT_FAST_PATH)
if (canUseGlyphCache(run))
return selectionRectForSimpleText(run, point, h, from, to);
#endif
return selectionRectForComplexText(run, point, h, from, to);
}
int Font::offsetForPosition(const TextRun& run, int x, bool includePartialGlyphs) const
{
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont())
return offsetForPositionForTextUsingSVGFont(run, x, includePartialGlyphs);
#endif
#if USE(FONT_FAST_PATH)
if (canUseGlyphCache(run))
return offsetForPositionForSimpleText(run, x, includePartialGlyphs);
#endif
return offsetForPositionForComplexText(run, x, includePartialGlyphs);
}
#if ENABLE(SVG_FONTS)
bool Font::isSVGFont() const
{
return primaryFont()->isSVGFont();
}
#endif
FontSelector* Font::fontSelector() const
{
return m_fontList ? m_fontList->fontSelector() : 0;
}
static bool shouldUseFontSmoothing = true;
void Font::setShouldUseSmoothing(bool shouldUseSmoothing)
{
ASSERT(isMainThread() || pthread_main_np());
shouldUseFontSmoothing = shouldUseSmoothing;
}
bool Font::shouldUseSmoothing()
{
return shouldUseFontSmoothing;
}
static CGFontSmoothingStyle fontSmoothingStyle = kCGFontSmoothingStyleMedium;
void Font::setSmoothingStyle(CGFontSmoothingStyle newStyle)
{
fontSmoothingStyle = newStyle;
}
CGFontSmoothingStyle Font::smoothingStyle()
{
return fontSmoothingStyle;
}
static CGFontAntialiasingStyle fontAntialiasingStyle = kCGFontAntialiasingStyleUnfiltered;
void Font::setAntialiasingStyle(CGFontAntialiasingStyle newStyle)
{
fontAntialiasingStyle = newStyle;
}
CGFontAntialiasingStyle Font::antialiasingStyle()
{
return fontAntialiasingStyle;
}
}