static FILE* fopen_win(const char* utf8path, const char* perm) {
if (is_ascii(utf8path)) {
return fopen(utf8path, perm);
}
const char* ptr = utf8path;
const char* end = utf8path + strlen(utf8path);
size_t n = 0;
while (ptr < end) {
SkUnichar u = SkUTF8_NextUnicharWithError(&ptr, end);
if (u < 0) {
return nullptr; // malformed UTF-8
}
n += SkUTF16_FromUnichar(u);
}
std::vector<uint16_t> wchars(n + 1);
uint16_t* out = wchars.data();
for (const char* ptr = utf8path; ptr < end;) {
out += SkUTF16_FromUnichar(SkUTF8_NextUnicharWithError(&ptr, end), out);
}
SkASSERT(out == &wchars[n]);
*out = 0; // final null
wchar_t wperms[4] = {(wchar_t)perm[0], (wchar_t)perm[1], (wchar_t)perm[2], (wchar_t)perm[3]};
return _wfopen((wchar_t*)wchars.data(), wperms);
}
static size_t uni_to_utf16(const SkUnichar src[], void* dst, int count) {
uint16_t* u16 = (uint16_t*)dst;
for (int i = 0; i < count; ++i) {
int n = SkToInt(SkUTF16_FromUnichar(src[i], u16));
u16 += n;
}
return (char*)u16 - (char*)dst;
}
static hb_bool_t harfbuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData)
{
SkPaint* paint = reinterpret_cast<SkPaint*>(fontData);
paint->setTextEncoding(SkPaint::kUTF16_TextEncoding);
uint16_t text[4];
size_t length = SkUTF16_FromUnichar(unicode, text);
uint16_t glyph16;
paint->textToGlyphs(text, length, &glyph16);
*glyph = glyph16;
return !!*glyph;
}
static void test_utf16(skiatest::Reporter* reporter) {
static const SkUnichar gUni[] = {
0x10000, 0x18080, 0x20202, 0xFFFFF, 0x101234
};
uint16_t buf[2];
for (size_t i = 0; i < SK_ARRAY_COUNT(gUni); i++) {
size_t count = SkUTF16_FromUnichar(gUni[i], buf);
REPORTER_ASSERT(reporter, count == 2);
size_t count2 = SkUTF16_CountUnichars(buf, 2);
REPORTER_ASSERT(reporter, count2 == 1);
const uint16_t* ptr = buf;
SkUnichar c = SkUTF16_NextUnichar(&ptr);
REPORTER_ASSERT(reporter, c == gUni[i]);
REPORTER_ASSERT(reporter, ptr - buf == 2);
}
}
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();
}
