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Implemented the font family listing on Windows.

This commit is contained in:
Pietro Gagliardi 2015-12-22 20:01:53 -05:00
parent 5d47fcab5a
commit 9efb452b2e
2 changed files with 83 additions and 1 deletions
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2
build/GNUbasemsvc.mk
View File

@ -65,7 +65,7 @@ else
endif
@echo ====== Compiled $<
$(OBJDIR)/%.cpp.o: $$(subst _,/,%).c $(HFILES) | $(OBJDIR)
$(OBJDIR)/%.cpp.o: $$(subst _,/,%).cpp $(HFILES) | $(OBJDIR)
ifeq ($(NODEBUG),1)
@cl /Fo:$@ /c $< $(CXXFLAGS)
else

82
windows/drawtext.cpp
View File

@ -18,3 +18,85 @@ void uninitDrawText(void)
{
dwfactory->Release();
}
struct uiDrawFontFamilies {
IDWriteFontCollection *fonts;
WCHAR userLocale[LOCALE_NAME_MAX_LENGTH];
int userLocaleSuccess;
};
uiDrawFontFamilies *uiDrawListFontFamilies(void)
{
uiDrawFontFamilies *ff;
HRESULT hr;
ff = uiNew(uiDrawFontFamilies);
// always get the latest available font information
hr = dwfactory->GetSystemFontCollection(&(ff->fonts), TRUE);
if (hr != S_OK)
logHRESULT("error getting list of system fonts in uiDrawListFontFamilies()", hr);
ff->userLocaleSuccess = GetUserDefaultLocaleName(ff->userLocale, LOCALE_NAME_MAX_LENGTH);
return ff;
}
uintmax_t uiDrawFontFamiliesNumFamilies(uiDrawFontFamilies *ff)
{
return ff->fonts->GetFontFamilyCount();
}
char *uiDrawFontFamiliesFamily(uiDrawFontFamilies *ff, uintmax_t n)
{
IDWriteFontFamily *family;
IDWriteLocalizedStrings *names;
UINT32 index;
BOOL exists;
UINT32 length;
WCHAR *wname;
char *name;
HRESULT hr;
hr = ff->fonts->GetFontFamily(n, &family);
if (hr != S_OK)
logHRESULT("error getting font out of collection in uiDrawFontFamiliesFamily()", hr);
hr = family->GetFamilyNames(&names);
if (hr != S_OK)
logHRESULT("error getting names of font out in uiDrawFontFamiliesFamily()", hr);
// this is complex, but we ignore failure conditions to allow fallbacks
// 1) If the user locale name was successfully retrieved, try it
// 2) If the user locale name was not successfully retrieved, or that locale's string does not exist, or an error occurred, try L"en-us", the US English locale
// 3) And if that fails, assume the first one
// This algorithm is straight from MSDN: https://msdn.microsoft.com/en-us/library/windows/desktop/dd368214%28v=vs.85%29.aspx
// For step 2 to work, start by setting hr to S_OK and exists to FALSE.
// TODO does it skip step 2 entirely if step 1 fails? rewrite it to be a more pure conversion of the MSDN code?
hr = S_OK;
exists = FALSE;
if (ff->userLocaleSuccess != 0)
hr = names->FindLocaleName(ff->userLocale, &index, &exists);
if (hr != S_OK || (hr == S_OK && !exists))
hr = names->FindLocaleName(L"en-us", &index, &exists);
if (!exists)
index = 0;
hr = names->GetStringLength(index, &length);
if (hr != S_OK)
logHRESULT("error getting length of font name in uiDrawFontFamiliesFamily()", hr);
// GetStringLength() does not include the null terminator, but GetString() does
wname = (WCHAR *) uiAlloc((length + 1) * sizeof (WCHAR), "WCHAR[]");
hr = names->GetString(index, wname, length + 1);
if (hr != S_OK)
logHRESULT("error getting font name in uiDrawFontFamiliesFamily()", hr);
name = toUTF8(wname);
uiFree(wname);
names->Release();
family->Release();
return name;
}
void uiDrawFreeFontFamilies(uiDrawFontFamilies *ff)
{
ff->fonts->Release();
uiFree(ff);
}