gecko-dev/gfx/thebes/gfxGDIFontList.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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/. */
#ifndef GFX_GDIFONTLIST_H
#define GFX_GDIFONTLIST_H
#include "mozilla/MemoryReporting.h"
#include "gfxWindowsPlatform.h"
#include "gfxPlatformFontList.h"
#include "nsGkAtoms.h"
#include <windows.h>
class AutoDC // get the global device context, and auto-release it on destruction
{
public:
AutoDC() {
mDC = ::GetDC(nullptr);
}
~AutoDC() {
::ReleaseDC(nullptr, mDC);
}
HDC GetDC() {
return mDC;
}
private:
HDC mDC;
};
class AutoSelectFont // select a font into the given DC, and auto-restore
{
public:
AutoSelectFont(HDC aDC, LOGFONTW *aLogFont)
: mOwnsFont(false)
{
mFont = ::CreateFontIndirectW(aLogFont);
if (mFont) {
mOwnsFont = true;
mDC = aDC;
mOldFont = (HFONT)::SelectObject(aDC, mFont);
} else {
mOldFont = nullptr;
}
}
AutoSelectFont(HDC aDC, HFONT aFont)
: mOwnsFont(false)
{
mDC = aDC;
mFont = aFont;
mOldFont = (HFONT)::SelectObject(aDC, aFont);
}
~AutoSelectFont() {
if (mOldFont) {
::SelectObject(mDC, mOldFont);
if (mOwnsFont) {
::DeleteObject(mFont);
}
}
}
bool IsValid() const {
return mFont != nullptr;
}
HFONT GetFont() const {
return mFont;
}
private:
HDC mDC;
HFONT mFont;
HFONT mOldFont;
bool mOwnsFont;
};
/**
* List of different types of fonts we support on Windows.
* These can generally be lumped in to 3 categories where we have to
* do special things: Really old fonts bitmap and vector fonts (device
* and raster), Type 1 fonts, and TrueType/OpenType fonts.
*
* This list is sorted in order from least prefered to most prefered.
* We prefer Type1 fonts over OpenType fonts to avoid falling back to
* things like Arial (opentype) when you ask for Helvetica (type1)
**/
enum gfxWindowsFontType {
GFX_FONT_TYPE_UNKNOWN = 0,
GFX_FONT_TYPE_DEVICE,
GFX_FONT_TYPE_RASTER,
GFX_FONT_TYPE_TRUETYPE,
GFX_FONT_TYPE_PS_OPENTYPE,
GFX_FONT_TYPE_TT_OPENTYPE,
GFX_FONT_TYPE_TYPE1
};
// A single member of a font family (i.e. a single face, such as Times Italic)
// represented as a LOGFONT that will resolve to the correct face.
// This replaces FontEntry from gfxWindowsFonts.h/cpp.
class GDIFontEntry : public gfxFontEntry
{
public:
LPLOGFONTW GetLogFont() { return &mLogFont; }
nsresult ReadCMAP(FontInfoData *aFontInfoData = nullptr);
virtual bool IsSymbolFont();
void FillLogFont(LOGFONTW *aLogFont, uint16_t aWeight, gfxFloat aSize,
bool aUseCleartype);
static gfxWindowsFontType DetermineFontType(const NEWTEXTMETRICW& metrics,
DWORD fontType)
{
gfxWindowsFontType feType;
if (metrics.ntmFlags & NTM_TYPE1)
feType = GFX_FONT_TYPE_TYPE1;
else if (metrics.ntmFlags & NTM_PS_OPENTYPE)
feType = GFX_FONT_TYPE_PS_OPENTYPE;
else if (metrics.ntmFlags & NTM_TT_OPENTYPE)
feType = GFX_FONT_TYPE_TT_OPENTYPE;
else if (fontType == TRUETYPE_FONTTYPE)
feType = GFX_FONT_TYPE_TRUETYPE;
else if (fontType == RASTER_FONTTYPE)
feType = GFX_FONT_TYPE_RASTER;
else if (fontType == DEVICE_FONTTYPE)
feType = GFX_FONT_TYPE_DEVICE;
else
feType = GFX_FONT_TYPE_UNKNOWN;
return feType;
}
bool IsType1() const {
return (mFontType == GFX_FONT_TYPE_TYPE1);
}
bool IsTrueType() const {
return (mFontType == GFX_FONT_TYPE_TRUETYPE ||
mFontType == GFX_FONT_TYPE_PS_OPENTYPE ||
mFontType == GFX_FONT_TYPE_TT_OPENTYPE);
}
virtual bool MatchesGenericFamily(const nsACString& aGeneric) const {
if (aGeneric.IsEmpty()) {
return true;
}
// Japanese 'Mincho' fonts do not belong to FF_MODERN even if
// they are fixed pitch because they have variable stroke width.
if (mWindowsFamily == FF_ROMAN && mWindowsPitch & FIXED_PITCH) {
return aGeneric.EqualsLiteral("monospace");
}
// Japanese 'Gothic' fonts do not belong to FF_SWISS even if
// they are variable pitch because they have constant stroke width.
if (mWindowsFamily == FF_MODERN && mWindowsPitch & VARIABLE_PITCH) {
return aGeneric.EqualsLiteral("sans-serif");
}
// All other fonts will be grouped correctly using family...
switch (mWindowsFamily) {
case FF_DONTCARE:
return false;
case FF_ROMAN:
return aGeneric.EqualsLiteral("serif");
case FF_SWISS:
return aGeneric.EqualsLiteral("sans-serif");
case FF_MODERN:
return aGeneric.EqualsLiteral("monospace");
case FF_SCRIPT:
return aGeneric.EqualsLiteral("cursive");
case FF_DECORATIVE:
return aGeneric.EqualsLiteral("fantasy");
}
return false;
}
virtual bool SupportsLangGroup(nsIAtom* aLangGroup) const override {
if (!aLangGroup || aLangGroup == nsGkAtoms::Unicode) {
return true;
}
int16_t bit = -1;
/* map our langgroup names in to Windows charset bits */
if (aLangGroup == nsGkAtoms::x_western) {
bit = ANSI_CHARSET;
} else if (aLangGroup == nsGkAtoms::Japanese) {
bit = SHIFTJIS_CHARSET;
} else if (aLangGroup == nsGkAtoms::ko) {
bit = HANGEUL_CHARSET;
} else if (aLangGroup == nsGkAtoms::zh_cn) {
bit = GB2312_CHARSET;
} else if (aLangGroup == nsGkAtoms::zh_tw) {
bit = CHINESEBIG5_CHARSET;
} else if (aLangGroup == nsGkAtoms::el_) {
bit = GREEK_CHARSET;
} else if (aLangGroup == nsGkAtoms::he) {
bit = HEBREW_CHARSET;
} else if (aLangGroup == nsGkAtoms::ar) {
bit = ARABIC_CHARSET;
} else if (aLangGroup == nsGkAtoms::x_cyrillic) {
bit = RUSSIAN_CHARSET;
} else if (aLangGroup == nsGkAtoms::th) {
bit = THAI_CHARSET;
}
if (bit != -1) {
return mCharset.test(bit);
}
return false;
}
virtual bool SupportsRange(uint8_t range) {
return mUnicodeRanges.test(range);
}
virtual bool SkipDuringSystemFallback() {
return !HasCmapTable(); // explicitly skip non-SFNT fonts
}
virtual bool TestCharacterMap(uint32_t aCh);
virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const;
// create a font entry for a font with a given name
static GDIFontEntry* CreateFontEntry(const nsAString& aName,
gfxWindowsFontType aFontType,
uint8_t aStyle,
uint16_t aWeight, int16_t aStretch,
gfxUserFontData* aUserFontData,
bool aFamilyHasItalicFace);
// create a font entry for a font referenced by its fullname
static GDIFontEntry* LoadLocalFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle);
uint8_t mWindowsFamily;
uint8_t mWindowsPitch;
gfxWindowsFontType mFontType;
bool mForceGDI : 1;
// For src:local user-fonts, we keep track of whether the platform family
// contains an italic face, because in this case we can't safely ask GDI
// to create synthetic italics (oblique) via the LOGFONT.
// (For other types of font, this is just set to false.)
bool mFamilyHasItalicFace : 1;
gfxSparseBitSet mCharset;
gfxSparseBitSet mUnicodeRanges;
protected:
friend class gfxWindowsFont;
GDIFontEntry(const nsAString& aFaceName, gfxWindowsFontType aFontType,
uint8_t aStyle, uint16_t aWeight, int16_t aStretch,
gfxUserFontData *aUserFontData, bool aFamilyHasItalicFace);
void InitLogFont(const nsAString& aName, gfxWindowsFontType aFontType);
virtual gfxFont *CreateFontInstance(const gfxFontStyle *aFontStyle, bool aNeedsBold);
virtual nsresult CopyFontTable(uint32_t aTableTag,
nsTArray<uint8_t>& aBuffer) override;
LOGFONTW mLogFont;
};
// a single font family, referencing one or more faces
class GDIFontFamily : public gfxFontFamily
{
public:
GDIFontFamily(nsAString &aName) :
gfxFontFamily(aName) {}
virtual void FindStyleVariations(FontInfoData *aFontInfoData = nullptr);
private:
static int CALLBACK FamilyAddStylesProc(const ENUMLOGFONTEXW *lpelfe,
const NEWTEXTMETRICEXW *nmetrics,
DWORD fontType, LPARAM data);
};
class gfxGDIFontList : public gfxPlatformFontList {
public:
static gfxGDIFontList* PlatformFontList() {
return static_cast<gfxGDIFontList*>(sPlatformFontList);
}
// initialize font lists
virtual nsresult InitFontListForPlatform() override;
bool FindAndAddFamilies(const nsAString& aFamily,
nsTArray<gfxFontFamily*>* aOutput,
gfxFontStyle* aStyle = nullptr,
gfxFloat aDevToCssSize = 1.0) override;
virtual gfxFontEntry* LookupLocalFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle);
virtual gfxFontEntry* MakePlatformFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle,
const uint8_t* aFontData,
uint32_t aLength);
virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const;
virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const;
protected:
virtual gfxFontFamily*
GetDefaultFontForPlatform(const gfxFontStyle* aStyle) override;
private:
friend class gfxWindowsPlatform;
gfxGDIFontList();
nsresult GetFontSubstitutes();
static int CALLBACK EnumFontFamExProc(ENUMLOGFONTEXW *lpelfe,
NEWTEXTMETRICEXW *lpntme,
DWORD fontType,
LPARAM lParam);
virtual already_AddRefed<FontInfoData> CreateFontInfoData();
#ifdef MOZ_BUNDLED_FONTS
void ActivateBundledFonts();
#endif
FontFamilyTable mFontSubstitutes;
nsTArray<nsString> mNonExistingFonts;
};
#endif /* GFX_GDIFONTLIST_H */