UniscribeController.h [plain text]
#ifndef UniscribeController_h
#define UniscribeController_h
#include <usp10.h>
#include "Font.h"
#include "GlyphBuffer.h"
#include <wtf/Vector.h>
namespace WebCore {
class UniscribeController {
public:
UniscribeController(const Font*, const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0);
void advance(unsigned to, GlyphBuffer* = 0);
int offsetForPosition(int x, bool includePartialGlyphs);
float runWidthSoFar() const { return m_runWidthSoFar; }
float minGlyphBoundingBoxX() const { return m_minGlyphBoundingBoxX; }
float maxGlyphBoundingBoxX() const { return m_maxGlyphBoundingBoxX; }
float minGlyphBoundingBoxY() const { return m_minGlyphBoundingBoxY; }
float maxGlyphBoundingBoxY() const { return m_maxGlyphBoundingBoxY; }
private:
void resetControlAndState();
void itemizeShapeAndPlace(const UChar*, unsigned length, const SimpleFontData*, GlyphBuffer*);
bool shapeAndPlaceItem(const UChar*, unsigned index, const SimpleFontData*, GlyphBuffer*);
bool shape(const UChar* str, int len, SCRIPT_ITEM item, const SimpleFontData* fontData,
Vector<WORD>& glyphs, Vector<WORD>& clusters,
Vector<SCRIPT_VISATTR>& visualAttributes);
const Font& m_font;
const TextRun& m_run;
HashSet<const SimpleFontData*>* m_fallbackFonts;
FloatPoint m_glyphOrigin;
float m_minGlyphBoundingBoxX;
float m_maxGlyphBoundingBoxX;
float m_minGlyphBoundingBoxY;
float m_maxGlyphBoundingBoxY;
SCRIPT_CONTROL m_control;
SCRIPT_STATE m_state;
Vector<SCRIPT_ITEM> m_items;
unsigned m_currentCharacter;
int m_end;
float m_runWidthSoFar;
float m_padding;
float m_padPerSpace;
bool m_computingOffsetPosition;
bool m_includePartialGlyphs;
float m_offsetX;
int m_offsetPosition;
};
}
#endif