gecko/gfx/2d/ScaledFontMac.cpp

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#include "ScaledFontMac.h"
#ifdef USE_SKIA
#include "PathSkia.h"
#include "skia/SkPaint.h"
#include "skia/SkPath.h"
#include "skia/SkTypeface_mac.h"
#endif
#include "DrawTargetCG.h"
#include <vector>

// prototype for private API
extern "C" {
CGPathRef CGFontGetGlyphPath(CGFontRef fontRef, CGAffineTransform *textTransform, int unknown, CGGlyph glyph);
};


namespace mozilla {
namespace gfx {

ScaledFontMac::ScaledFontMac(CGFontRef aFont, Float aSize)
  : ScaledFontBase(aSize)
{
  // XXX: should we be taking a reference
  mFont = CGFontRetain(aFont);
}

ScaledFontMac::~ScaledFontMac()
{
  CGFontRelease(mFont);
}

#ifdef USE_SKIA
SkTypeface* ScaledFontMac::GetSkTypeface()
{
  if (!mTypeface) {
    CTFontRef fontFace = CTFontCreateWithGraphicsFont(mFont, mSize, NULL, NULL);
    mTypeface = SkCreateTypefaceFromCTFont(fontFace);
    CFRelease(fontFace);
  }
  return mTypeface;
}
#endif

// private API here are the public options on OS X
// CTFontCreatePathForGlyph
// ATSUGlyphGetCubicPaths
// we've used this in cairo sucessfully for some time.
// Note: cairo dlsyms it. We could do that but maybe it's
// safe just to use?

TemporaryRef<Path>
ScaledFontMac::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
{
  if (aTarget->GetType() == BACKEND_COREGRAPHICS) {
      CGMutablePathRef path = CGPathCreateMutable();

      for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
          // XXX: we could probably fold both of these transforms together to avoid extra work
          CGAffineTransform flip = CGAffineTransformMakeScale(1, -1);
          CGPathRef glyphPath = ::CGFontGetGlyphPath(mFont, &flip, 0, aBuffer.mGlyphs[i].mIndex);

          CGAffineTransform matrix = CGAffineTransformMake(mSize, 0, 0, mSize,
                                                           aBuffer.mGlyphs[i].mPosition.x,
                                                           aBuffer.mGlyphs[i].mPosition.y);
          CGPathAddPath(path, &matrix, glyphPath);
          CGPathRelease(glyphPath);
      }
      return new PathCG(path, FILL_WINDING);
  } else {
      return ScaledFontBase::GetPathForGlyphs(aBuffer, aTarget);
  }
}

}
}