gecko/gfx/2d/ScaledFontMac.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2012-05-21 04:12:37 -07:00
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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>
#include <dlfcn.h>
// prototype for private API
extern "C" {
CGPathRef CGFontGetGlyphPath(CGFontRef fontRef, CGAffineTransform *textTransform, int unknown, CGGlyph glyph);
};
namespace mozilla {
namespace gfx {
ScaledFontMac::CTFontDrawGlyphsFuncT* ScaledFontMac::CTFontDrawGlyphsPtr = nullptr;
bool ScaledFontMac::sSymbolLookupDone = false;
ScaledFontMac::ScaledFontMac(CGFontRef aFont, Float aSize)
: ScaledFontBase(aSize)
{
if (!sSymbolLookupDone) {
CTFontDrawGlyphsPtr =
(CTFontDrawGlyphsFuncT*)dlsym(RTLD_DEFAULT, "CTFontDrawGlyphs");
sSymbolLookupDone = true;
}
// XXX: should we be taking a reference
mFont = CGFontRetain(aFont);
if (CTFontDrawGlyphsPtr != nullptr) {
// only create mCTFont if we're going to be using the CTFontDrawGlyphs API
mCTFont = CTFontCreateWithGraphicsFont(aFont, aSize, nullptr, nullptr);
} else {
mCTFont = nullptr;
}
}
ScaledFontMac::~ScaledFontMac()
{
if (mCTFont) {
CFRelease(mCTFont);
}
CGFontRelease(mFont);
}
#ifdef USE_SKIA
SkTypeface* ScaledFontMac::GetSkTypeface()
{
if (!mTypeface) {
if (mCTFont) {
mTypeface = SkCreateTypefaceFromCTFont(mCTFont);
} else {
CTFontRef fontFace = CTFontCreateWithGraphicsFont(mFont, mSize, nullptr, nullptr);
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 || aTarget->GetType() == BACKEND_COREGRAPHICS_ACCELERATED) {
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);
}
TemporaryRef<Path> ret = new PathCG(path, FILL_WINDING);
CGPathRelease(path);
return ret;
} else {
return ScaledFontBase::GetPathForGlyphs(aBuffer, aTarget);
}
}
void
ScaledFontMac::CopyGlyphsToBuilder(const GlyphBuffer &aBuffer, PathBuilder *aBuilder)
{
PathBuilderCG *pathBuilderCG =
static_cast<PathBuilderCG*>(aBuilder);
// XXX: check builder type
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(pathBuilderCG->mCGPath, &matrix, glyphPath);
CGPathRelease(glyphPath);
}
}
}
}