SkTypeface* SkFontMgr_DirectWrite::onLegacyCreateTypeface(const char familyName[],
SkFontStyle style) 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.
this->getDefaultFontFamily(&fontFamily);
}
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;
DWriteStyle dwStyle(style);
HRNM(fontFamily->GetFirstMatchingFont(dwStyle.fWeight, dwStyle.fWidth, dwStyle.fSlant, &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());
}
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::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 (NULL == fontFamily.get()) {
// No family with given name, try default.
HRNM(this->getDefaultFontFamily(&fontFamily), "Could not get default font family.");
}
if (NULL == 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());
}
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 (fFactory2.get()) {
SkTScopedComPtr<IDWriteFontFallback> systemFontFallback;
IDWriteFontFallback* fontFallback = fFontFallback.get();
if (!fontFallback) {
HRNM(fFactory2->GetSystemFontFallback(&systemFontFallback),
"Could not get system fallback.");
fontFallback = systemFontFallback.get();
}
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());
}
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();
}
