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/*
* Copyright (c) 2006, 2007, 2008, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef FontPlatformDataHarfBuzz_h
#define FontPlatformDataHarfBuzz_h
#include "SkPaint.h"
#include "platform/SharedBuffer.h"
#include "platform/fonts/FontDescription.h"
#include "platform/fonts/FontOrientation.h"
#include "platform/fonts/FontRenderStyle.h"
#include "platform/fonts/opentype/OpenTypeVerticalData.h"
#include "wtf/Forward.h"
#include "wtf/HashTableDeletedValueType.h"
#include "wtf/RefPtr.h"
#include "wtf/text/CString.h"
#include "wtf/text/StringImpl.h"
class SkTypeface;
typedef uint32_t SkFontID;
namespace WebCore {
class GraphicsContext;
class HarfBuzzFace;
// -----------------------------------------------------------------------------
// FontPlatformData is the handle which WebKit has on a specific face. A face
// is the tuple of (font, size, ...etc). Here we are just wrapping a Skia
// SkTypeface pointer and dealing with the reference counting etc.
// -----------------------------------------------------------------------------
class PLATFORM_EXPORT FontPlatformData {
public:
// Used for deleted values in the font cache's hash tables. The hash table
// will create us with this structure, and it will compare other values
// to this "Deleted" one. It expects the Deleted one to be differentiable
// from the 0 one (created with the empty constructor), so we can't just
// set everything to 0.
FontPlatformData(WTF::HashTableDeletedValueType);
FontPlatformData();
FontPlatformData(float textSize, bool fakeBold, bool fakeItalic);
FontPlatformData(const FontPlatformData&);
FontPlatformData(PassRefPtr<SkTypeface>, const char* name, float textSize, bool fakeBold, bool fakeItalic, FontOrientation = Horizontal, bool subpixelTextPosition = FontDescription::subpixelPositioning());
FontPlatformData(const FontPlatformData& src, float textSize);
~FontPlatformData();
String fontFamilyName() const;
// -------------------------------------------------------------------------
// Return true iff this font is monospaced (i.e. every glyph has an equal x
// advance)
// -------------------------------------------------------------------------
bool isFixedPitch() const;
// -------------------------------------------------------------------------
// Setup a Skia painting context to use this font.
// -------------------------------------------------------------------------
void setupPaint(SkPaint*, GraphicsContext* = 0) const;
// -------------------------------------------------------------------------
// Return Skia's unique id for this font. This encodes both the style and
// the font's file name so refers to a single face.
// -------------------------------------------------------------------------
SkFontID uniqueID() const;
SkTypeface* typeface() const { return m_typeface.get(); }
unsigned hash() const;
float size() const { return m_textSize; }
int emSizeInFontUnits() const;
FontOrientation orientation() const { return m_orientation; }
void setOrientation(FontOrientation orientation) { m_orientation = orientation; }
void setFakeBold(bool fakeBold) { m_fakeBold = fakeBold; }
void setFakeItalic(bool fakeItalic) { m_fakeItalic = fakeItalic; }
bool operator==(const FontPlatformData&) const;
FontPlatformData& operator=(const FontPlatformData&);
bool isHashTableDeletedValue() const { return m_isHashTableDeletedValue; }
#if ENABLE(OPENTYPE_VERTICAL)
PassRefPtr<OpenTypeVerticalData> verticalData() const;
PassRefPtr<SharedBuffer> openTypeTable(uint32_t table) const;
#endif
#ifndef NDEBUG
String description() const;
#endif
HarfBuzzFace* harfBuzzFace() const;
// The returned styles are all actual styles without FontRenderStyle::NoPreference.
const FontRenderStyle& fontRenderStyle() const { return m_style; }
// -------------------------------------------------------------------------
// Global font preferences...
static void setHinting(SkPaint::Hinting);
static void setAutoHint(bool);
static void setUseBitmaps(bool);
static void setAntiAlias(bool);
static void setSubpixelRendering(bool);
private:
void getRenderStyleForStrike(const char*, int);
void querySystemForRenderStyle(bool useSkiaSubpixelPositioning);
RefPtr<SkTypeface> m_typeface;
CString m_family;
float m_textSize;
mutable int m_emSizeInFontUnits;
bool m_fakeBold;
bool m_fakeItalic;
FontOrientation m_orientation;
FontRenderStyle m_style;
mutable RefPtr<HarfBuzzFace> m_harfBuzzFace;
bool m_isHashTableDeletedValue;
};
} // namespace WebCore
#endif // ifdef FontPlatformDataHarfBuzz_h
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