/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTypes.h"
#if defined(SK_BUILD_FOR_WIN32)
#include "SkDWrite.h"
#include "SkDWriteFontFileStream.h"
#include "SkFontMgr.h"
#include "SkHRESULT.h"
#include "SkMutex.h"
#include "SkStream.h"
#include "SkTScopedComPtr.h"
#include "SkTypeface.h"
#include "SkTypefaceCache.h"
#include "SkTypeface_win_dw.h"
#include "SkTypes.h"
#include "SkUtils.h"
#include <dwrite.h>
#if SK_HAS_DWRITE_2_H
#include <dwrite_2.h>
#endif
////////////////////////////////////////////////////////////////////////////////
class StreamFontFileLoader : public IDWriteFontFileLoader {
public:
// IUnknown methods
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** ppvObject);
virtual ULONG STDMETHODCALLTYPE AddRef();
virtual ULONG STDMETHODCALLTYPE Release();
// IDWriteFontFileLoader methods
virtual HRESULT STDMETHODCALLTYPE CreateStreamFromKey(
void const* fontFileReferenceKey,
UINT32 fontFileReferenceKeySize,
IDWriteFontFileStream** fontFileStream);
// Takes ownership of stream.
static HRESULT Create(SkStreamAsset* stream, StreamFontFileLoader** streamFontFileLoader) {
*streamFontFileLoader = new StreamFontFileLoader(stream);
if (nullptr == streamFontFileLoader) {
return E_OUTOFMEMORY;
}
return S_OK;
}
SkAutoTDelete<SkStreamAsset> fStream;
private:
StreamFontFileLoader(SkStreamAsset* stream) : fStream(stream), fRefCount(1) { }
virtual ~StreamFontFileLoader() { }
ULONG fRefCount;
};
HRESULT StreamFontFileLoader::QueryInterface(REFIID iid, void** ppvObject) {
if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileLoader)) {
*ppvObject = this;
AddRef();
return S_OK;
} else {
*ppvObject = nullptr;
return E_NOINTERFACE;
}
}
ULONG StreamFontFileLoader::AddRef() {
return InterlockedIncrement(&fRefCount);
}
ULONG StreamFontFileLoader::Release() {
ULONG newCount = InterlockedDecrement(&fRefCount);
if (0 == newCount) {
delete this;
}
return newCount;
}
HRESULT StreamFontFileLoader::CreateStreamFromKey(
void const* fontFileReferenceKey,
UINT32 fontFileReferenceKeySize,
IDWriteFontFileStream** fontFileStream)
{
SkTScopedComPtr<SkDWriteFontFileStreamWrapper> stream;
HR(SkDWriteFontFileStreamWrapper::Create(fStream->duplicate(), &stream));
*fontFileStream = stream.release();
return S_OK;
}
////////////////////////////////////////////////////////////////////////////////
class StreamFontFileEnumerator : public IDWriteFontFileEnumerator {
public:
// IUnknown methods
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** ppvObject);
virtual ULONG STDMETHODCALLTYPE AddRef();
virtual ULONG STDMETHODCALLTYPE Release();
// IDWriteFontFileEnumerator methods
virtual HRESULT STDMETHODCALLTYPE MoveNext(BOOL* hasCurrentFile);
virtual HRESULT STDMETHODCALLTYPE GetCurrentFontFile(IDWriteFontFile** fontFile);
static HRESULT Create(IDWriteFactory* factory, IDWriteFontFileLoader* fontFileLoader,
StreamFontFileEnumerator** streamFontFileEnumerator) {
*streamFontFileEnumerator = new StreamFontFileEnumerator(factory, fontFileLoader);
if (nullptr == streamFontFileEnumerator) {
return E_OUTOFMEMORY;
}
return S_OK;
}
private:
StreamFontFileEnumerator(IDWriteFactory* factory, IDWriteFontFileLoader* fontFileLoader);
virtual ~StreamFontFileEnumerator() { }
ULONG fRefCount;
SkTScopedComPtr<IDWriteFactory> fFactory;
SkTScopedComPtr<IDWriteFontFile> fCurrentFile;
SkTScopedComPtr<IDWriteFontFileLoader> fFontFileLoader;
bool fHasNext;
};
StreamFontFileEnumerator::StreamFontFileEnumerator(IDWriteFactory* factory,
IDWriteFontFileLoader* fontFileLoader)
: fRefCount(1)
, fFactory(SkRefComPtr(factory))
, fCurrentFile()
, fFontFileLoader(SkRefComPtr(fontFileLoader))
, fHasNext(true)
{ }
HRESULT StreamFontFileEnumerator::QueryInterface(REFIID iid, void** ppvObject) {
if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileEnumerator)) {
*ppvObject = this;
AddRef();
return S_OK;
} else {
*ppvObject = nullptr;
return E_NOINTERFACE;
}
}
ULONG StreamFontFileEnumerator::AddRef() {
return InterlockedIncrement(&fRefCount);
}
ULONG StreamFontFileEnumerator::Release() {
ULONG newCount = InterlockedDecrement(&fRefCount);
if (0 == newCount) {
delete this;
}
return newCount;
}
HRESULT StreamFontFileEnumerator::MoveNext(BOOL* hasCurrentFile) {
*hasCurrentFile = FALSE;
if (!fHasNext) {
return S_OK;
}
fHasNext = false;
UINT32 dummy = 0;
HR(fFactory->CreateCustomFontFileReference(
&dummy, //cannot be nullptr
sizeof(dummy), //even if this is 0
fFontFileLoader.get(),
&fCurrentFile));
*hasCurrentFile = TRUE;
return S_OK;
}
HRESULT StreamFontFileEnumerator::GetCurrentFontFile(IDWriteFontFile** fontFile) {
if (fCurrentFile.get() == nullptr) {
*fontFile = nullptr;
return E_FAIL;
}
*fontFile = SkRefComPtr(fCurrentFile.get());
return S_OK;
}
////////////////////////////////////////////////////////////////////////////////
class StreamFontCollectionLoader : public IDWriteFontCollectionLoader {
public:
// IUnknown methods
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** ppvObject);
virtual ULONG STDMETHODCALLTYPE AddRef();
virtual ULONG STDMETHODCALLTYPE Release();
// IDWriteFontCollectionLoader methods
virtual HRESULT STDMETHODCALLTYPE CreateEnumeratorFromKey(
IDWriteFactory* factory,
void const* collectionKey,
UINT32 collectionKeySize,
IDWriteFontFileEnumerator** fontFileEnumerator);
static HRESULT Create(IDWriteFontFileLoader* fontFileLoader,
StreamFontCollectionLoader** streamFontCollectionLoader) {
*streamFontCollectionLoader = new StreamFontCollectionLoader(fontFileLoader);
if (nullptr == streamFontCollectionLoader) {
return E_OUTOFMEMORY;
}
return S_OK;
}
private:
StreamFontCollectionLoader(IDWriteFontFileLoader* fontFileLoader)
: fRefCount(1)
, fFontFileLoader(SkRefComPtr(fontFileLoader))
{ }
virtual ~StreamFontCollectionLoader() { }
ULONG fRefCount;
SkTScopedComPtr<IDWriteFontFileLoader> fFontFileLoader;
};
HRESULT StreamFontCollectionLoader::QueryInterface(REFIID iid, void** ppvObject) {
if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontCollectionLoader)) {
*ppvObject = this;
AddRef();
return S_OK;
} else {
*ppvObject = nullptr;
return E_NOINTERFACE;
}
}
ULONG StreamFontCollectionLoader::AddRef() {
return InterlockedIncrement(&fRefCount);
}
ULONG StreamFontCollectionLoader::Release() {
ULONG newCount = InterlockedDecrement(&fRefCount);
if (0 == newCount) {
delete this;
}
return newCount;
}
HRESULT StreamFontCollectionLoader::CreateEnumeratorFromKey(
IDWriteFactory* factory,
void const* collectionKey,
UINT32 collectionKeySize,
IDWriteFontFileEnumerator** fontFileEnumerator)
{
SkTScopedComPtr<StreamFontFileEnumerator> enumerator;
HR(StreamFontFileEnumerator::Create(factory, fFontFileLoader.get(), &enumerator));
*fontFileEnumerator = enumerator.release();
return S_OK;
}
////////////////////////////////////////////////////////////////////////////////
class SkFontMgr_DirectWrite : public SkFontMgr {
public:
/** localeNameLength must include the null terminator. */
SkFontMgr_DirectWrite(IDWriteFactory* factory, IDWriteFontCollection* fontCollection,
WCHAR* localeName, int localeNameLength)
: fFactory(SkRefComPtr(factory))
, fFontCollection(SkRefComPtr(fontCollection))
, fLocaleName(localeNameLength)
{
#if SK_HAS_DWRITE_2_H
if (!SUCCEEDED(fFactory->QueryInterface(&fFactory2))) {
// IUnknown::QueryInterface states that if it fails, punk will be set to nullptr.
// http://blogs.msdn.com/b/oldnewthing/archive/2004/03/26/96777.aspx
SkASSERT_RELEASE(nullptr == fFactory2.get());
}
#endif
memcpy(fLocaleName.get(), localeName, localeNameLength * sizeof(WCHAR));
}
protected:
int onCountFamilies() const override;
void onGetFamilyName(int index, SkString* familyName) const override;
SkFontStyleSet* onCreateStyleSet(int index) const override;
SkFontStyleSet* onMatchFamily(const char familyName[]) const override;
virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
const SkFontStyle& fontstyle) const override;
virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
const char* bcp47[], int bcp47Count,
SkUnichar character) const override;
virtual SkTypeface* onMatchFaceStyle(const SkTypeface* familyMember,
const SkFontStyle& fontstyle) const override;
SkTypeface* onCreateFromStream(SkStreamAsset* stream, int ttcIndex) const override;
SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const override;
SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const override;
virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
unsigned styleBits) const override;
private:
HRESULT getByFamilyName(const WCHAR familyName[], IDWriteFontFamily** fontFamily) const;
HRESULT getDefaultFontFamily(IDWriteFontFamily** fontFamily) const;
/** Creates a typeface using a typeface cache. */
SkTypeface* createTypefaceFromDWriteFont(IDWriteFontFace* fontFace,
IDWriteFont* font,
IDWriteFontFamily* fontFamily) const;
SkTScopedComPtr<IDWriteFactory> fFactory;
#if SK_HAS_DWRITE_2_H
SkTScopedComPtr<IDWriteFactory2> fFactory2;
#endif
SkTScopedComPtr<IDWriteFontCollection> fFontCollection;
SkSMallocWCHAR fLocaleName;
mutable SkMutex fTFCacheMutex;
mutable SkTypefaceCache fTFCache;
friend class SkFontStyleSet_DirectWrite;
friend class FontFallbackRenderer;
};
class SkFontStyleSet_DirectWrite : public SkFontStyleSet {
public:
SkFontStyleSet_DirectWrite(const SkFontMgr_DirectWrite* fontMgr,
IDWriteFontFamily* fontFamily)
: fFontMgr(SkRef(fontMgr))
, fFontFamily(SkRefComPtr(fontFamily))
{ }
int count() override;
void getStyle(int index, SkFontStyle* fs, SkString* styleName) override;
SkTypeface* createTypeface(int index) override;
SkTypeface* matchStyle(const SkFontStyle& pattern) override;
private:
SkAutoTUnref<const SkFontMgr_DirectWrite> fFontMgr;
SkTScopedComPtr<IDWriteFontFamily> fFontFamily;
};
static HRESULT are_same(IUnknown* a, IUnknown* b, bool& same) {
SkTScopedComPtr<IUnknown> iunkA;
HRM(a->QueryInterface(&iunkA), "Failed to QI<IUnknown> for a.");
SkTScopedComPtr<IUnknown> iunkB;
HRM(b->QueryInterface(&iunkB), "Failed to QI<IUnknown> for b.");
same = (iunkA.get() == iunkB.get());
return S_OK;
}
struct ProtoDWriteTypeface {
IDWriteFontFace* fDWriteFontFace;
IDWriteFont* fDWriteFont;
IDWriteFontFamily* fDWriteFontFamily;
};
static bool FindByDWriteFont(SkTypeface* cached, const SkFontStyle&, void* ctx) {
DWriteFontTypeface* cshFace = reinterpret_cast<DWriteFontTypeface*>(cached);
ProtoDWriteTypeface* ctxFace = reinterpret_cast<ProtoDWriteTypeface*>(ctx);
bool same;
//Check to see if the two fonts are identical.
HRB(are_same(cshFace->fDWriteFont.get(), ctxFace->fDWriteFont, same));
if (same) {
return true;
}
HRB(are_same(cshFace->fDWriteFontFace.get(), ctxFace->fDWriteFontFace, same));
if (same) {
return true;
}
//Check if the two fonts share the same loader and have the same key.
UINT32 cshNumFiles;
UINT32 ctxNumFiles;
HRB(cshFace->fDWriteFontFace->GetFiles(&cshNumFiles, nullptr));
HRB(ctxFace->fDWriteFontFace->GetFiles(&ctxNumFiles, nullptr));
if (cshNumFiles != ctxNumFiles) {
return false;
}
SkTScopedComPtr<IDWriteFontFile> cshFontFile;
SkTScopedComPtr<IDWriteFontFile> ctxFontFile;
HRB(cshFace->fDWriteFontFace->GetFiles(&cshNumFiles, &cshFontFile));
HRB(ctxFace->fDWriteFontFace->GetFiles(&ctxNumFiles, &ctxFontFile));
//for (each file) { //we currently only admit fonts from one file.
SkTScopedComPtr<IDWriteFontFileLoader> cshFontFileLoader;
SkTScopedComPtr<IDWriteFontFileLoader> ctxFontFileLoader;
HRB(cshFontFile->GetLoader(&cshFontFileLoader));
HRB(ctxFontFile->GetLoader(&ctxFontFileLoader));
HRB(are_same(cshFontFileLoader.get(), ctxFontFileLoader.get(), same));
if (!same) {
return false;
}
//}
const void* cshRefKey;
UINT32 cshRefKeySize;
const void* ctxRefKey;
UINT32 ctxRefKeySize;
HRB(cshFontFile->GetReferenceKey(&cshRefKey, &cshRefKeySize));
HRB(ctxFontFile->GetReferenceKey(&ctxRefKey, &ctxRefKeySize));
if (cshRefKeySize != ctxRefKeySize) {
return false;
}
if (0 != memcmp(cshRefKey, ctxRefKey, ctxRefKeySize)) {
return false;
}
//TODO: better means than comparing name strings?
//NOTE: .ttc and fake bold/italic will end up here.
SkTScopedComPtr<IDWriteLocalizedStrings> cshFamilyNames;
SkTScopedComPtr<IDWriteLocalizedStrings> cshFaceNames;
HRB(cshFace->fDWriteFontFamily->GetFamilyNames(&cshFamilyNames));
HRB(cshFace->fDWriteFont->GetFaceNames(&cshFaceNames));
UINT32 cshFamilyNameLength;
UINT32 cshFaceNameLength;
HRB(cshFamilyNames->GetStringLength(0, &cshFamilyNameLength));
HRB(cshFaceNames->GetStringLength(0, &cshFaceNameLength));
SkTScopedComPtr<IDWriteLocalizedStrings> ctxFamilyNames;
SkTScopedComPtr<IDWriteLocalizedStrings> ctxFaceNames;
HRB(ctxFace->fDWriteFontFamily->GetFamilyNames(&ctxFamilyNames));
HRB(ctxFace->fDWriteFont->GetFaceNames(&ctxFaceNames));
UINT32 ctxFamilyNameLength;
UINT32 ctxFaceNameLength;
HRB(ctxFamilyNames->GetStringLength(0, &ctxFamilyNameLength));
HRB(ctxFaceNames->GetStringLength(0, &ctxFaceNameLength));
if (cshFamilyNameLength != ctxFamilyNameLength ||
cshFaceNameLength != ctxFaceNameLength)
{
return false;
}
SkSMallocWCHAR cshFamilyName(cshFamilyNameLength+1);
SkSMallocWCHAR cshFaceName(cshFaceNameLength+1);
HRB(cshFamilyNames->GetString(0, cshFamilyName.get(), cshFamilyNameLength+1));
HRB(cshFaceNames->GetString(0, cshFaceName.get(), cshFaceNameLength+1));
SkSMallocWCHAR ctxFamilyName(ctxFamilyNameLength+1);
SkSMallocWCHAR ctxFaceName(ctxFaceNameLength+1);
HRB(ctxFamilyNames->GetString(0, ctxFamilyName.get(), ctxFamilyNameLength+1));
HRB(ctxFaceNames->GetString(0, ctxFaceName.get(), ctxFaceNameLength+1));
return wcscmp(cshFamilyName.get(), ctxFamilyName.get()) == 0 &&
wcscmp(cshFaceName.get(), ctxFaceName.get()) == 0;
}
SkTypeface* SkFontMgr_DirectWrite::createTypefaceFromDWriteFont(
IDWriteFontFace* fontFace,
IDWriteFont* font,
IDWriteFontFamily* fontFamily) const {
SkAutoMutexAcquire ama(fTFCacheMutex);
ProtoDWriteTypeface spec = { fontFace, font, fontFamily };
SkTypeface* face = fTFCache.findByProcAndRef(FindByDWriteFont, &spec);
if (nullptr == face) {
face = DWriteFontTypeface::Create(fFactory.get(), fontFace, font, fontFamily);
if (face) {
fTFCache.add(face, get_style(font));
}
}
return face;
}
int SkFontMgr_DirectWrite::onCountFamilies() const {
return fFontCollection->GetFontFamilyCount();
}
void SkFontMgr_DirectWrite::onGetFamilyName(int index, SkString* familyName) const {
SkTScopedComPtr<IDWriteFontFamily> fontFamily;
HRVM(fFontCollection->GetFontFamily(index, &fontFamily), "Could not get requested family.");
SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
HRVM(fontFamily->GetFamilyNames(&familyNames), "Could not get family names.");
sk_get_locale_string(familyNames.get(), fLocaleName.get(), familyName);
}
SkFontStyleSet* SkFontMgr_DirectWrite::onCreateStyleSet(int index) const {
SkTScopedComPtr<IDWriteFontFamily> fontFamily;
HRNM(fFontCollection->GetFontFamily(index, &fontFamily), "Could not get requested family.");
return new SkFontStyleSet_DirectWrite(this, fontFamily.get());
}
SkFontStyleSet* SkFontMgr_DirectWrite::onMatchFamily(const char familyName[]) const {
SkSMallocWCHAR dwFamilyName;
HRN(sk_cstring_to_wchar(familyName, &dwFamilyName));
UINT32 index;
BOOL exists;
HRNM(fFontCollection->FindFamilyName(dwFamilyName.get(), &index, &exists),
"Failed while finding family by name.");
if (!exists) {
return nullptr;
}
return this->onCreateStyleSet(index);
}
SkTypeface* SkFontMgr_DirectWrite::onMatchFamilyStyle(const char familyName[],
const SkFontStyle& fontstyle) const {
SkAutoTUnref<SkFontStyleSet> sset(this->matchFamily(familyName));
return sset->matchStyle(fontstyle);
}
class FontFallbackRenderer : public IDWriteTextRenderer {
public:
FontFallbackRenderer(const SkFontMgr_DirectWrite* outer, UINT32 character)
: fRefCount(1), fOuter(SkSafeRef(outer)), fCharacter(character), fResolvedTypeface(nullptr) {
}
virtual ~FontFallbackRenderer() { }
// IDWriteTextRenderer methods
virtual HRESULT STDMETHODCALLTYPE DrawGlyphRun(
void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_MEASURING_MODE measuringMode,
DWRITE_GLYPH_RUN const* glyphRun,
DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
IUnknown* clientDrawingEffect) override
{
SkTScopedComPtr<IDWriteFont> font;
HRM(fOuter->fFontCollection->GetFontFromFontFace(glyphRun->fontFace, &font),
"Could not get font from font face.");
// It is possible that the font passed does not actually have the requested character,
// due to no font being found and getting the fallback font.
// Check that the font actually contains the requested character.
BOOL exists;
HRM(font->HasCharacter(fCharacter, &exists), "Could not find character.");
if (exists) {
SkTScopedComPtr<IDWriteFontFamily> fontFamily;
HRM(font->GetFontFamily(&fontFamily), "Could not get family.");
fResolvedTypeface = fOuter->createTypefaceFromDWriteFont(glyphRun->fontFace,
font.get(),
fontFamily.get());
}
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE DrawUnderline(
void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_UNDERLINE const* underline,
IUnknown* clientDrawingEffect) override
{ return E_NOTIMPL; }
virtual HRESULT STDMETHODCALLTYPE DrawStrikethrough(
void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_STRIKETHROUGH const* strikethrough,
IUnknown* clientDrawingEffect) override
{ return E_NOTIMPL; }
virtual HRESULT STDMETHODCALLTYPE DrawInlineObject(
void* clientDrawingContext,
FLOAT originX,
FLOAT originY,
IDWriteInlineObject* inlineObject,
BOOL isSideways,
BOOL isRightToLeft,
IUnknown* clientDrawingEffect) override
{ return E_NOTIMPL; }
// IDWritePixelSnapping methods
virtual HRESULT STDMETHODCALLTYPE IsPixelSnappingDisabled(
void* clientDrawingContext,
BOOL* isDisabled) override
{
*isDisabled = FALSE;
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE GetCurrentTransform(
void* clientDrawingContext,
DWRITE_MATRIX* transform) override
{
const DWRITE_MATRIX ident = { 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 };
*transform = ident;
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE GetPixelsPerDip(
void* clientDrawingContext,
FLOAT* pixelsPerDip) override
{
*pixelsPerDip = 1.0f;
return S_OK;
}
// IUnknown methods
ULONG STDMETHODCALLTYPE AddRef() override {
return InterlockedIncrement(&fRefCount);
}
ULONG STDMETHODCALLTYPE Release() override {
ULONG newCount = InterlockedDecrement(&fRefCount);
if (0 == newCount) {
delete this;
}
return newCount;
}
virtual HRESULT STDMETHODCALLTYPE QueryInterface(IID const& riid, void** ppvObject) override{
if (__uuidof(IUnknown) == riid ||
__uuidof(IDWritePixelSnapping) == riid ||
__uuidof(IDWriteTextRenderer) == riid)
{
*ppvObject = this;
this->AddRef();
return S_OK;
}
*ppvObject = nullptr;
return E_FAIL;
}
SkTypeface* FallbackTypeface() { return fResolvedTypeface; }
protected:
ULONG fRefCount;
SkAutoTUnref<const SkFontMgr_DirectWrite> fOuter;
UINT32 fCharacter;
SkTypeface* fResolvedTypeface;
};
class FontFallbackSource : public IDWriteTextAnalysisSource {
public:
FontFallbackSource(const WCHAR* string, UINT32 length, const WCHAR* locale,
IDWriteNumberSubstitution* numberSubstitution)
: fString(string)
, fLength(length)
, fLocale(locale)
, fNumberSubstitution(numberSubstitution)
{ }
virtual ~FontFallbackSource() { }
// IDWriteTextAnalysisSource methods
virtual HRESULT STDMETHODCALLTYPE GetTextAtPosition(
UINT32 textPosition,
WCHAR const** textString,
UINT32* textLength) override
{
if (fLength <= textPosition) {
*textString = nullptr;
*textLength = 0;
return S_OK;
}
*textString = fString + textPosition;
*textLength = fLength - textPosition;
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE GetTextBeforePosition(
UINT32 textPosition,
WCHAR const** textString,
UINT32* textLength) override
{
if (textPosition < 1 || fLength <= textPosition) {
*textString = nullptr;
*textLength = 0;
return S_OK;
}
*textString = fString;
*textLength = textPosition;
return S_OK;
}
virtual DWRITE_READING_DIRECTION STDMETHODCALLTYPE GetParagraphReadingDirection() override {
// TODO: this is also interesting.
return DWRITE_READING_DIRECTION_LEFT_TO_RIGHT;
}
virtual HRESULT STDMETHODCALLTYPE GetLocaleName(
UINT32 textPosition,
UINT32* textLength,
WCHAR const** localeName) override
{
*localeName = fLocale;
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE GetNumberSubstitution(
UINT32 textPosition,
UINT32* textLength,
IDWriteNumberSubstitution** numberSubstitution) override
{
*numberSubstitution = fNumberSubstitution;
return S_OK;
}
// IUnknown methods
ULONG STDMETHODCALLTYPE AddRef() override {
return InterlockedIncrement(&fRefCount);
}
ULONG STDMETHODCALLTYPE Release() override {
ULONG newCount = InterlockedDecrement(&fRefCount);
if (0 == newCount) {
delete this;
}
return newCount;
}
virtual HRESULT STDMETHODCALLTYPE QueryInterface(IID const& riid, void** ppvObject) override{
if (__uuidof(IUnknown) == riid ||
__uuidof(IDWriteTextAnalysisSource) == riid)
{
*ppvObject = this;
this->AddRef();
return S_OK;
}
*ppvObject = nullptr;
return E_FAIL;
}
protected:
ULONG fRefCount;
const WCHAR* fString;
UINT32 fLength;
const WCHAR* fLocale;
IDWriteNumberSubstitution* fNumberSubstitution;
};
SkTypeface* SkFontMgr_DirectWrite::onMatchFamilyStyleCharacter(const char familyName[],
const SkFontStyle& style,
const char* bcp47[], int bcp47Count,
SkUnichar character) const
{
const DWriteStyle dwStyle(style);
const WCHAR* dwFamilyName = nullptr;
SkSMallocWCHAR dwFamilyNameLocal;
if (familyName) {
HRN(sk_cstring_to_wchar(familyName, &dwFamilyNameLocal));
dwFamilyName = dwFamilyNameLocal;
}
WCHAR str[16];
UINT32 strLen = static_cast<UINT32>(
SkUTF16_FromUnichar(character, reinterpret_cast<uint16_t*>(str)));
const SkSMallocWCHAR* dwBcp47;
SkSMallocWCHAR dwBcp47Local;
if (bcp47Count < 1) {
dwBcp47 = &fLocaleName;
} else {
// TODO: support fallback stack.
// TODO: DirectWrite supports 'zh-CN' or 'zh-Hans', but 'zh' misses completely
// and may produce a Japanese font.
HRN(sk_cstring_to_wchar(bcp47[bcp47Count - 1], &dwBcp47Local));
dwBcp47 = &dwBcp47Local;
}
#if SK_HAS_DWRITE_2_H
if (fFactory2.get()) {
SkTScopedComPtr<IDWriteFontFallback> fontFallback;
HRNM(fFactory2->GetSystemFontFallback(&fontFallback), "Could not get system fallback.");
SkTScopedComPtr<IDWriteNumberSubstitution> numberSubstitution;
HRNM(fFactory2->CreateNumberSubstitution(DWRITE_NUMBER_SUBSTITUTION_METHOD_NONE, nullptr, TRUE,
&numberSubstitution),
"Could not create number substitution.");
SkTScopedComPtr<FontFallbackSource> fontFallbackSource(
new FontFallbackSource(str, strLen, *dwBcp47, numberSubstitution.get()));
UINT32 mappedLength;
SkTScopedComPtr<IDWriteFont> font;
FLOAT scale;
HRNM(fontFallback->MapCharacters(fontFallbackSource.get(),
0, // textPosition,
strLen,
fFontCollection.get(),
dwFamilyName,
dwStyle.fWeight,
dwStyle.fSlant,
dwStyle.fWidth,
&mappedLength,
&font,
&scale),
"Could not map characters");
if (!font.get()) {
return nullptr;
}
SkTScopedComPtr<IDWriteFontFace> fontFace;
HRNM(font->CreateFontFace(&fontFace), "Could not get font face from font.");
SkTScopedComPtr<IDWriteFontFamily> fontFamily;
HRNM(font->GetFontFamily(&fontFamily), "Could not get family from font.");
return this->createTypefaceFromDWriteFont(fontFace.get(), font.get(), fontFamily.get());
}
#else
# pragma message("No dwrite_2.h is available, font fallback may be affected.")
#endif
SkTScopedComPtr<IDWriteTextFormat> fallbackFormat;
HRNM(fFactory->CreateTextFormat(dwFamilyName ? dwFamilyName : L"",
fFontCollection.get(),
dwStyle.fWeight,
dwStyle.fSlant,
dwStyle.fWidth,
72.0f,
*dwBcp47,
&fallbackFormat),
"Could not create text format.");
SkTScopedComPtr<IDWriteTextLayout> fallbackLayout;
HRNM(fFactory->CreateTextLayout(str, strLen, fallbackFormat.get(),
200.0f, 200.0f,
&fallbackLayout),
"Could not create text layout.");
SkTScopedComPtr<FontFallbackRenderer> fontFallbackRenderer(
new FontFallbackRenderer(this, character));
HRNM(fallbackLayout->Draw(nullptr, fontFallbackRenderer.get(), 50.0f, 50.0f),
"Could not draw layout with renderer.");
return fontFallbackRenderer->FallbackTypeface();
}
SkTypeface* SkFontMgr_DirectWrite::onMatchFaceStyle(const SkTypeface* familyMember,
const SkFontStyle& fontstyle) const {
SkString familyName;
SkFontStyleSet_DirectWrite sset(
this, ((DWriteFontTypeface*)familyMember)->fDWriteFontFamily.get()
);
return sset.matchStyle(fontstyle);
}
template <typename T> class SkAutoIDWriteUnregister {
public:
SkAutoIDWriteUnregister(IDWriteFactory* factory, T* unregister)
: fFactory(factory), fUnregister(unregister)
{ }
~SkAutoIDWriteUnregister() {
if (fUnregister) {
unregister(fFactory, fUnregister);
}
}
T* detatch() {
T* old = fUnregister;
fUnregister = nullptr;
return old;
}
private:
HRESULT unregister(IDWriteFactory* factory, IDWriteFontFileLoader* unregister) {
return factory->UnregisterFontFileLoader(unregister);
}
HRESULT unregister(IDWriteFactory* factory, IDWriteFontCollectionLoader* unregister) {
return factory->UnregisterFontCollectionLoader(unregister);
}
IDWriteFactory* fFactory;
T* fUnregister;
};
SkTypeface* SkFontMgr_DirectWrite::onCreateFromStream(SkStreamAsset* stream, int ttcIndex) const {
SkTScopedComPtr<StreamFontFileLoader> fontFileLoader;
// This transfers ownership of stream to the new object.
HRN(StreamFontFileLoader::Create(stream, &fontFileLoader));
HRN(fFactory->RegisterFontFileLoader(fontFileLoader.get()));
SkAutoIDWriteUnregister<StreamFontFileLoader> autoUnregisterFontFileLoader(
fFactory.get(), fontFileLoader.get());
SkTScopedComPtr<StreamFontCollectionLoader> fontCollectionLoader;
HRN(StreamFontCollectionLoader::Create(fontFileLoader.get(), &fontCollectionLoader));
HRN(fFactory->RegisterFontCollectionLoader(fontCollectionLoader.get()));
SkAutoIDWriteUnregister<StreamFontCollectionLoader> autoUnregisterFontCollectionLoader(
fFactory.get(), fontCollectionLoader.get());
SkTScopedComPtr<IDWriteFontCollection> fontCollection;
HRN(fFactory->CreateCustomFontCollection(fontCollectionLoader.get(), nullptr, 0, &fontCollection));
// Find the first non-simulated font which has the given ttc index.
UINT32 familyCount = fontCollection->GetFontFamilyCount();
for (UINT32 familyIndex = 0; familyIndex < familyCount; ++familyIndex) {
SkTScopedComPtr<IDWriteFontFamily> fontFamily;
HRN(fontCollection->GetFontFamily(familyIndex, &fontFamily));
UINT32 fontCount = fontFamily->GetFontCount();
for (UINT32 fontIndex = 0; fontIndex < fontCount; ++fontIndex) {
SkTScopedComPtr<IDWriteFont> font;
HRN(fontFamily->GetFont(fontIndex, &font));
if (font->GetSimulations() != DWRITE_FONT_SIMULATIONS_NONE) {
continue;
}
SkTScopedComPtr<IDWriteFontFace> fontFace;
HRN(font->CreateFontFace(&fontFace));
UINT32 faceIndex = fontFace->GetIndex();
if (faceIndex == ttcIndex) {
return DWriteFontTypeface::Create(fFactory.get(),
fontFace.get(), font.get(), fontFamily.get(),
autoUnregisterFontFileLoader.detatch(),
autoUnregisterFontCollectionLoader.detatch());
}
}
}
return nullptr;
}
SkTypeface* SkFontMgr_DirectWrite::onCreateFromData(SkData* data, int ttcIndex) const {
return this->createFromStream(new SkMemoryStream(data), ttcIndex);
}
SkTypeface* SkFontMgr_DirectWrite::onCreateFromFile(const char path[], int ttcIndex) const {
return this->createFromStream(SkStream::NewFromFile(path), ttcIndex);
}
HRESULT SkFontMgr_DirectWrite::getByFamilyName(const WCHAR wideFamilyName[],
IDWriteFontFamily** fontFamily) const {
UINT32 index;
BOOL exists;
HR(fFontCollection->FindFamilyName(wideFamilyName, &index, &exists));
if (exists) {
HR(fFontCollection->GetFontFamily(index, fontFamily));
}
return S_OK;
}
HRESULT SkFontMgr_DirectWrite::getDefaultFontFamily(IDWriteFontFamily** fontFamily) const {
NONCLIENTMETRICSW metrics;
metrics.cbSize = sizeof(metrics);
if (0 == SystemParametersInfoW(SPI_GETNONCLIENTMETRICS,
sizeof(metrics),
&metrics,
0)) {
return E_UNEXPECTED;
}
HRM(this->getByFamilyName(metrics.lfMessageFont.lfFaceName, fontFamily),
"Could not create DWrite font family from LOGFONT.");
return S_OK;
}
SkTypeface* SkFontMgr_DirectWrite::onLegacyCreateTypeface(const char familyName[],
unsigned styleBits) const {
SkTScopedComPtr<IDWriteFontFamily> fontFamily;
if (familyName) {
SkSMallocWCHAR wideFamilyName;
if (SUCCEEDED(sk_cstring_to_wchar(familyName, &wideFamilyName))) {
this->getByFamilyName(wideFamilyName, &fontFamily);
}
}
if (nullptr == fontFamily.get()) {
// No family with given name, try default.
HRNM(this->getDefaultFontFamily(&fontFamily), "Could not get default font family.");
}
if (nullptr == fontFamily.get()) {
// Could not obtain the default font.
HRNM(fFontCollection->GetFontFamily(0, &fontFamily),
"Could not get default-default font family.");
}
SkTScopedComPtr<IDWriteFont> font;
DWRITE_FONT_WEIGHT weight = (styleBits & SkTypeface::kBold)
? DWRITE_FONT_WEIGHT_BOLD
: DWRITE_FONT_WEIGHT_NORMAL;
DWRITE_FONT_STRETCH stretch = DWRITE_FONT_STRETCH_NORMAL;
DWRITE_FONT_STYLE italic = (styleBits & SkTypeface::kItalic)
? DWRITE_FONT_STYLE_ITALIC
: DWRITE_FONT_STYLE_NORMAL;
HRNM(fontFamily->GetFirstMatchingFont(weight, stretch, italic, &font),
"Could not get matching font.");
SkTScopedComPtr<IDWriteFontFace> fontFace;
HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");
return this->createTypefaceFromDWriteFont(fontFace.get(), font.get(), fontFamily.get());
}
///////////////////////////////////////////////////////////////////////////////
int SkFontStyleSet_DirectWrite::count() {
return fFontFamily->GetFontCount();
}
SkTypeface* SkFontStyleSet_DirectWrite::createTypeface(int index) {
SkTScopedComPtr<IDWriteFont> font;
HRNM(fFontFamily->GetFont(index, &font), "Could not get font.");
SkTScopedComPtr<IDWriteFontFace> fontFace;
HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");
return fFontMgr->createTypefaceFromDWriteFont(fontFace.get(), font.get(), fFontFamily.get());
}
void SkFontStyleSet_DirectWrite::getStyle(int index, SkFontStyle* fs, SkString* styleName) {
SkTScopedComPtr<IDWriteFont> font;
HRVM(fFontFamily->GetFont(index, &font), "Could not get font.");
if (fs) {
SkFontStyle::Slant slant;
switch (font->GetStyle()) {
case DWRITE_FONT_STYLE_NORMAL:
slant = SkFontStyle::kUpright_Slant;
break;
case DWRITE_FONT_STYLE_OBLIQUE:
case DWRITE_FONT_STYLE_ITALIC:
slant = SkFontStyle::kItalic_Slant;
break;
default:
SkASSERT(false);
}
int weight = font->GetWeight();
int width = font->GetStretch();
*fs = SkFontStyle(weight, width, slant);
}
if (styleName) {
SkTScopedComPtr<IDWriteLocalizedStrings> faceNames;
if (SUCCEEDED(font->GetFaceNames(&faceNames))) {
sk_get_locale_string(faceNames.get(), fFontMgr->fLocaleName.get(), styleName);
}
}
}
SkTypeface* SkFontStyleSet_DirectWrite::matchStyle(const SkFontStyle& pattern) {
DWRITE_FONT_STYLE slant;
switch (pattern.slant()) {
case SkFontStyle::kUpright_Slant:
slant = DWRITE_FONT_STYLE_NORMAL;
break;
case SkFontStyle::kItalic_Slant:
slant = DWRITE_FONT_STYLE_ITALIC;
break;
default:
SkASSERT(false);
}
DWRITE_FONT_WEIGHT weight = (DWRITE_FONT_WEIGHT)pattern.weight();
DWRITE_FONT_STRETCH width = (DWRITE_FONT_STRETCH)pattern.width();
SkTScopedComPtr<IDWriteFont> font;
// TODO: perhaps use GetMatchingFonts and get the least simulated?
HRNM(fFontFamily->GetFirstMatchingFont(weight, width, slant, &font),
"Could not match font in family.");
SkTScopedComPtr<IDWriteFontFace> fontFace;
HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");
return fFontMgr->createTypefaceFromDWriteFont(fontFace.get(), font.get(),
fFontFamily.get());
}
////////////////////////////////////////////////////////////////////////////////
#include "SkTypeface_win.h"
SK_API SkFontMgr* SkFontMgr_New_DirectWrite(IDWriteFactory* factory,
IDWriteFontCollection* collection) {
if (nullptr == factory) {
factory = sk_get_dwrite_factory();
if (nullptr == factory) {
return nullptr;
}
}
SkTScopedComPtr<IDWriteFontCollection> systemFontCollection;
if (nullptr == collection) {
HRNM(factory->GetSystemFontCollection(&systemFontCollection, FALSE),
"Could not get system font collection.");
collection = systemFontCollection.get();
}
WCHAR localeNameStorage[LOCALE_NAME_MAX_LENGTH];
WCHAR* localeName = nullptr;
int localeNameLen = 0;
// Dynamically load GetUserDefaultLocaleName function, as it is not available on XP.
SkGetUserDefaultLocaleNameProc getUserDefaultLocaleNameProc = nullptr;
HRESULT hr = SkGetGetUserDefaultLocaleNameProc(&getUserDefaultLocaleNameProc);
if (nullptr == getUserDefaultLocaleNameProc) {
SK_TRACEHR(hr, "Could not get GetUserDefaultLocaleName.");
} else {
localeNameLen = getUserDefaultLocaleNameProc(localeNameStorage, LOCALE_NAME_MAX_LENGTH);
if (localeNameLen) {
localeName = localeNameStorage;
};
}
return new SkFontMgr_DirectWrite(factory, collection, localeName, localeNameLen);
}
#include "SkFontMgr_indirect.h"
SK_API SkFontMgr* SkFontMgr_New_DirectWriteRenderer(SkRemotableFontMgr* proxy) {
SkAutoTUnref<SkFontMgr> impl(SkFontMgr_New_DirectWrite());
if (impl.get() == nullptr) {
return nullptr;
}
return new SkFontMgr_Indirect(impl.get(), proxy);
}
#endif//defined(SK_BUILD_FOR_WIN32)