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/*
* Copyright 2006-2012 The Android Open Source Project
* Copyright 2012 Mozilla Foundation
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKFONTHOST_FREETYPE_COMMON_H_
#define SKFONTHOST_FREETYPE_COMMON_H_
#include "SkGlyph.h"
#include "SkScalerContext.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#ifdef SK_DEBUG
#define SkASSERT_CONTINUE(pred) \
do { \
if (!(pred)) \
SkDebugf("file %s:%d: assert failed '" #pred "'\n", __FILE__, __LINE__); \
} while (false)
#else
#define SkASSERT_CONTINUE(pred)
#endif
class SkScalerContext_FreeType_Base : public SkScalerContext {
public:
// See http://freetype.sourceforge.net/freetype2/docs/reference/ft2-bitmap_handling.html#FT_Bitmap_Embolden
// This value was chosen by eyeballing the result in Firefox and trying to match it.
static const FT_Pos kBitmapEmboldenStrength = 1 << 6;
SkScalerContext_FreeType_Base(const SkDescriptor *desc)
: SkScalerContext(desc)
{}
protected:
void generateGlyphImage(FT_Face face, const SkGlyph& glyph, SkMaskGamma::PreBlend* maskPreBlend);
void generateGlyphPath(FT_Face face, const SkGlyph& glyph, SkPath* path);
void emboldenOutline(FT_Face face, FT_Outline* outline);
};
#endif // SKFONTHOST_FREETYPE_COMMON_H_
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