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410 lines
12 KiB
C++
410 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_DWRITEFONTLIST_H
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#define GFX_DWRITEFONTLIST_H
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#include "gfxDWriteCommon.h"
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#include "gfxFont.h"
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#include "gfxUserFontSet.h"
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#include "cairo-win32.h"
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#include "gfxPlatformFontList.h"
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#include "gfxPlatform.h"
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/**
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* gfxDWriteFontFamily is a class that describes one of the fonts on the
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* users system. It holds each gfxDWriteFontEntry (maps more directly to
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* a font face) which holds font type, charset info and character map info.
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*/
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class gfxDWriteFontEntry;
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/**
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* \brief Class representing directwrite font family.
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*/
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class gfxDWriteFontFamily : public gfxFontFamily
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{
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public:
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/**
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* Constructs a new DWriteFont Family.
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*
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* \param aName Name identifying the family
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* \param aFamily IDWriteFontFamily object representing the directwrite
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* family object.
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*/
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gfxDWriteFontFamily(const nsAString& aName,
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IDWriteFontFamily *aFamily)
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: gfxFontFamily(aName), mDWFamily(aFamily), mForceGDIClassic(false) {}
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virtual ~gfxDWriteFontFamily();
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virtual void FindStyleVariations();
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virtual void LocalizedName(nsAString& aLocalizedName);
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void SetForceGDIClassic(bool aForce) { mForceGDIClassic = aForce; }
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virtual void SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf,
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FontListSizes* aSizes) const;
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virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
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FontListSizes* aSizes) const;
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protected:
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/** This font family's directwrite fontfamily object */
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nsRefPtr<IDWriteFontFamily> mDWFamily;
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bool mForceGDIClassic;
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};
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/**
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* \brief Class representing DirectWrite FontEntry (a unique font style/family)
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*/
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class gfxDWriteFontEntry : public gfxFontEntry
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{
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public:
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/**
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* Constructs a font entry.
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*
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* \param aFaceName The name of the corresponding font face.
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* \param aFont DirectWrite font object
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*/
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gfxDWriteFontEntry(const nsAString& aFaceName,
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IDWriteFont *aFont)
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: gfxFontEntry(aFaceName), mFont(aFont), mFontFile(nullptr),
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mForceGDIClassic(false)
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{
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mItalic = (aFont->GetStyle() == DWRITE_FONT_STYLE_ITALIC ||
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aFont->GetStyle() == DWRITE_FONT_STYLE_OBLIQUE);
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mStretch = FontStretchFromDWriteStretch(aFont->GetStretch());
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uint16_t weight = NS_ROUNDUP(aFont->GetWeight() - 50, 100);
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weight = NS_MAX<uint16_t>(100, weight);
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weight = NS_MIN<uint16_t>(900, weight);
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mWeight = weight;
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mIsCJK = UNINITIALIZED_VALUE;
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}
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/**
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* Constructs a font entry using a font. But with custom font values.
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* This is used for creating correct font entries for @font-face with local
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* font source.
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*
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* \param aFaceName The name of the corresponding font face.
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* \param aFont DirectWrite font object
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* \param aWeight Weight of the font
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* \param aStretch Stretch of the font
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* \param aItalic True if italic
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*/
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gfxDWriteFontEntry(const nsAString& aFaceName,
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IDWriteFont *aFont,
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uint16_t aWeight,
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int16_t aStretch,
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bool aItalic)
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: gfxFontEntry(aFaceName), mFont(aFont), mFontFile(nullptr),
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mForceGDIClassic(false)
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{
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mWeight = aWeight;
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mStretch = aStretch;
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mItalic = aItalic;
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mIsUserFont = true;
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mIsLocalUserFont = true;
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mIsCJK = UNINITIALIZED_VALUE;
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}
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/**
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* Constructs a font entry using a font file.
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*
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* \param aFaceName The name of the corresponding font face.
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* \param aFontFile DirectWrite fontfile object
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* \param aWeight Weight of the font
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* \param aStretch Stretch of the font
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* \param aItalic True if italic
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*/
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gfxDWriteFontEntry(const nsAString& aFaceName,
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IDWriteFontFile *aFontFile,
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uint16_t aWeight,
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int16_t aStretch,
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bool aItalic)
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: gfxFontEntry(aFaceName), mFont(nullptr), mFontFile(aFontFile),
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mForceGDIClassic(false)
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{
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mWeight = aWeight;
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mStretch = aStretch;
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mItalic = aItalic;
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mIsUserFont = true;
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mIsCJK = UNINITIALIZED_VALUE;
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}
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virtual ~gfxDWriteFontEntry();
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virtual bool IsSymbolFont();
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virtual nsresult GetFontTable(uint32_t aTableTag,
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FallibleTArray<uint8_t>& aBuffer);
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nsresult ReadCMAP();
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bool IsCJKFont();
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void SetForceGDIClassic(bool aForce) { mForceGDIClassic = aForce; }
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bool GetForceGDIClassic() { return mForceGDIClassic; }
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virtual void SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf,
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FontListSizes* aSizes) const;
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virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
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FontListSizes* aSizes) const;
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protected:
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friend class gfxDWriteFont;
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friend class gfxDWriteFontList;
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virtual gfxFont *CreateFontInstance(const gfxFontStyle *aFontStyle,
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bool aNeedsBold);
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nsresult CreateFontFace(
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IDWriteFontFace **aFontFace,
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DWRITE_FONT_SIMULATIONS aSimulations = DWRITE_FONT_SIMULATIONS_NONE);
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static bool InitLogFont(IDWriteFont *aFont, LOGFONTW *aLogFont);
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/**
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* A fontentry only needs to have either of these. If it has both only
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* the IDWriteFont will be used.
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*/
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nsRefPtr<IDWriteFont> mFont;
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nsRefPtr<IDWriteFontFile> mFontFile;
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DWRITE_FONT_FACE_TYPE mFaceType;
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int8_t mIsCJK;
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bool mForceGDIClassic;
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};
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// custom text renderer used to determine the fallback font for a given char
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class FontFallbackRenderer : public IDWriteTextRenderer
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{
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public:
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FontFallbackRenderer(IDWriteFactory *aFactory)
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: mRefCount(0)
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{
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HRESULT hr = S_OK;
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hr = aFactory->GetSystemFontCollection(getter_AddRefs(mSystemFonts));
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NS_ASSERTION(SUCCEEDED(hr), "GetSystemFontCollection failed!");
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}
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~FontFallbackRenderer()
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{}
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// IDWriteTextRenderer methods
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IFACEMETHOD(DrawGlyphRun)(
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void* clientDrawingContext,
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FLOAT baselineOriginX,
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FLOAT baselineOriginY,
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DWRITE_MEASURING_MODE measuringMode,
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DWRITE_GLYPH_RUN const* glyphRun,
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DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
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IUnknown* clientDrawingEffect
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);
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IFACEMETHOD(DrawUnderline)(
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void* clientDrawingContext,
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FLOAT baselineOriginX,
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FLOAT baselineOriginY,
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DWRITE_UNDERLINE const* underline,
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IUnknown* clientDrawingEffect
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)
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{
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return E_NOTIMPL;
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}
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IFACEMETHOD(DrawStrikethrough)(
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void* clientDrawingContext,
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FLOAT baselineOriginX,
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FLOAT baselineOriginY,
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DWRITE_STRIKETHROUGH const* strikethrough,
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IUnknown* clientDrawingEffect
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)
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{
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return E_NOTIMPL;
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}
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IFACEMETHOD(DrawInlineObject)(
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void* clientDrawingContext,
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FLOAT originX,
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FLOAT originY,
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IDWriteInlineObject* inlineObject,
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BOOL isSideways,
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BOOL isRightToLeft,
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IUnknown* clientDrawingEffect
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)
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{
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return E_NOTIMPL;
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}
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// IDWritePixelSnapping methods
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IFACEMETHOD(IsPixelSnappingDisabled)(
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void* clientDrawingContext,
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BOOL* isDisabled
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)
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{
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*isDisabled = FALSE;
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return S_OK;
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}
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IFACEMETHOD(GetCurrentTransform)(
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void* clientDrawingContext,
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DWRITE_MATRIX* transform
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)
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{
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const DWRITE_MATRIX ident = {1.0, 0.0, 0.0, 1.0, 0.0, 0.0};
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*transform = ident;
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return S_OK;
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}
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IFACEMETHOD(GetPixelsPerDip)(
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void* clientDrawingContext,
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FLOAT* pixelsPerDip
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)
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{
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*pixelsPerDip = 1.0f;
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return S_OK;
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}
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// IUnknown methods
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IFACEMETHOD_(unsigned long, AddRef) ()
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{
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return InterlockedIncrement(&mRefCount);
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}
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IFACEMETHOD_(unsigned long, Release) ()
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{
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unsigned long newCount = InterlockedDecrement(&mRefCount);
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if (newCount == 0)
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{
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delete this;
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return 0;
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}
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return newCount;
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}
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IFACEMETHOD(QueryInterface) (IID const& riid, void** ppvObject)
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{
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if (__uuidof(IDWriteTextRenderer) == riid) {
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*ppvObject = this;
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} else if (__uuidof(IDWritePixelSnapping) == riid) {
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*ppvObject = this;
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} else if (__uuidof(IUnknown) == riid) {
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*ppvObject = this;
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} else {
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*ppvObject = NULL;
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return E_FAIL;
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}
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this->AddRef();
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return S_OK;
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}
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const nsString& FallbackFamilyName() { return mFamilyName; }
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protected:
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long mRefCount;
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nsRefPtr<IDWriteFontCollection> mSystemFonts;
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nsString mFamilyName;
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};
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class gfxDWriteFontList : public gfxPlatformFontList {
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public:
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gfxDWriteFontList();
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static gfxDWriteFontList* PlatformFontList() {
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return static_cast<gfxDWriteFontList*>(sPlatformFontList);
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}
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// initialize font lists
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virtual nsresult InitFontList();
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virtual gfxFontFamily* GetDefaultFont(const gfxFontStyle* aStyle);
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virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
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const nsAString& aFontName);
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virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
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const uint8_t *aFontData,
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uint32_t aLength);
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virtual bool ResolveFontName(const nsAString& aFontName,
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nsAString& aResolvedFontName);
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bool GetStandardFamilyName(const nsAString& aFontName,
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nsAString& aFamilyName);
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IDWriteGdiInterop *GetGDIInterop() { return mGDIInterop; }
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bool UseGDIFontTableAccess() { return mGDIFontTableAccess; }
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virtual gfxFontFamily* FindFamily(const nsAString& aFamily);
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virtual void GetFontFamilyList(nsTArray<nsRefPtr<gfxFontFamily> >& aFamilyArray);
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gfxFloat GetForceGDIClassicMaxFontSize() { return mForceGDIClassicMaxFontSize; }
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virtual void SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf,
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FontListSizes* aSizes) const;
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virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
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FontListSizes* aSizes) const;
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private:
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friend class gfxDWriteFontFamily;
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nsresult GetFontSubstitutes();
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void GetDirectWriteSubstitutes();
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// search fonts system-wide for a given character, null otherwise
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virtual gfxFontEntry* GlobalFontFallback(const uint32_t aCh,
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int32_t aRunScript,
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const gfxFontStyle* aMatchStyle,
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uint32_t& aCmapCount,
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gfxFontFamily** aMatchedFamily);
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virtual bool UsesSystemFallback() { return true; }
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/**
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* Fonts listed in the registry as substitutes but for which no actual
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* font family is found.
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*/
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nsTArray<nsString> mNonExistingFonts;
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typedef nsRefPtrHashtable<nsStringHashKey, gfxFontFamily> FontTable;
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/**
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* Table of font substitutes, we grab this from the registry to get
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* alternative font names.
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*/
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FontTable mFontSubstitutes;
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bool mInitialized;
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virtual nsresult DelayedInitFontList();
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gfxFloat mForceGDIClassicMaxFontSize;
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// whether to use GDI font table access routines
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bool mGDIFontTableAccess;
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nsRefPtr<IDWriteGdiInterop> mGDIInterop;
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nsRefPtr<FontFallbackRenderer> mFallbackRenderer;
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nsRefPtr<IDWriteTextFormat> mFallbackFormat;
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};
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#endif /* GFX_DWRITEFONTLIST_H */
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