void QWindowsFontEngineDirectWrite::initFontInfo(const QFontDef &request,
int dpi, IDWriteFont *font)
{
fontDef = request;
IDWriteFontFamily *fontFamily = NULL;
HRESULT hr = font->GetFontFamily(&fontFamily);
IDWriteLocalizedStrings *familyNames = NULL;
if (SUCCEEDED(hr))
hr = fontFamily->GetFamilyNames(&familyNames);
UINT32 index = 0;
if (SUCCEEDED(hr)) {
BOOL exists = false;
wchar_t localeName[LOCALE_NAME_MAX_LENGTH];
int defaultLocaleSuccess = GetUserDefaultLocaleName(localeName, LOCALE_NAME_MAX_LENGTH);
if (defaultLocaleSuccess)
hr = familyNames->FindLocaleName(localeName, &index, &exists);
if (SUCCEEDED(hr) && !exists)
hr = familyNames->FindLocaleName(L"en-us", &index, &exists);
if (!exists)
index = 0;
}
// Get the family name.
if (SUCCEEDED(hr)) {
UINT32 length = 0;
hr = familyNames->GetStringLength(index, &length);
if (SUCCEEDED(hr)) {
QVarLengthArray<wchar_t, 128> name(length+1);
hr = familyNames->GetString(index, name.data(), name.size());
if (SUCCEEDED(hr))
fontDef.family = QString::fromWCharArray(name.constData());
}
}
if (familyNames != NULL)
familyNames->Release();
if (fontFamily)
fontFamily->Release();
if (FAILED(hr))
qErrnoWarning(hr, "initFontInfo: Failed to get family name");
if (fontDef.pointSize < 0)
fontDef.pointSize = fontDef.pixelSize * 72. / dpi;
else if (fontDef.pixelSize == -1)
fontDef.pixelSize = qRound(fontDef.pointSize * dpi / 72.);
}
static void initFontInfo(QFontEngineDirectWrite *fe, const QFontDef &request,
int dpi, IDWriteFont *font)
{
fe->fontDef = request;
IDWriteFontFamily *fontFamily = NULL;
HRESULT hr = font->GetFontFamily(&fontFamily);
IDWriteLocalizedStrings *familyNames = NULL;
if (SUCCEEDED(hr))
hr = fontFamily->GetFamilyNames(&familyNames);
UINT32 index = 0;
BOOL exists = false;
wchar_t localeName[LOCALE_NAME_MAX_LENGTH];
if (SUCCEEDED(hr)) {
int defaultLocaleSuccess = GetUserDefaultLocaleName(localeName, LOCALE_NAME_MAX_LENGTH);
if (defaultLocaleSuccess)
hr = familyNames->FindLocaleName(localeName, &index, &exists);
if (SUCCEEDED(hr) && !exists)
hr = familyNames->FindLocaleName(L"en-us", &index, &exists);
}
if (!exists)
index = 0;
UINT32 length = 0;
if (SUCCEEDED(hr))
hr = familyNames->GetStringLength(index, &length);
wchar_t *name = new (std::nothrow) wchar_t[length+1];
if (name == NULL)
hr = E_OUTOFMEMORY;
// Get the family name.
if (SUCCEEDED(hr))
hr = familyNames->GetString(index, name, length + 1);
if (SUCCEEDED(hr))
fe->fontDef.family = QString::fromWCharArray(name);
delete[] name;
if (familyNames != NULL)
familyNames->Release();
if (FAILED(hr))
qErrnoWarning(hr, "initFontInfo: Failed to get family name");
if (fe->fontDef.pointSize < 0)
fe->fontDef.pointSize = fe->fontDef.pixelSize * 72. / dpi;
else if (fe->fontDef.pixelSize == -1)
fe->fontDef.pixelSize = qRound(fe->fontDef.pointSize * dpi / 72.);
}
HRESULT DWriteCreateResources(HDC hdc, wchar_t *text, HFONT hfont)
{
HRESULT hr = S_OK;
// If the DirectWrite factory doesn't exist, create the resources,
// only create these resources once.
if (!g_pDWriteFactory)
{
HWND hwnd;
RECT r;
// DirectWrite variables.
IDWriteFontFamily* pFontFamily = NULL;
IDWriteFont* pFont = NULL;
IDWriteLocalizedStrings* pFamilyNames = NULL;
// Logical (GDI) font.
LOGFONT lf = {};
UINT32 length = 0;
UINT32 index = 0;
float fontSize = 0;
// length of the string
UINT32 textLength = 0;
wchar_t *name = NULL;
// Get a handle to the DC and the window rect.
hwnd = WindowFromDC(hdc);
GetClientRect(hwnd, &r);
// Calculate the string length.
textLength = UINT32(wcslen(text));
// Create the DirectWrite factory.
hr = DWriteCreateFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(&g_pDWriteFactory)
);
// Create a GDI interop interface.
if (SUCCEEDED(hr))
{
hr = g_pDWriteFactory->GetGdiInterop(&g_pGdiInterop);
}
if (SUCCEEDED(hr))
{
// Get a logical font from the font handle.
GetObject(hfont, sizeof(LOGFONT), &lf);
}
// Convert to a DirectWrite font.
if (SUCCEEDED(hr))
{
hr = g_pGdiInterop->CreateFontFromLOGFONT(&lf, &pFont);
}
// Get the font family.
if (SUCCEEDED(hr))
{
hr = pFont->GetFontFamily(&pFontFamily);
}
// Get a list of localized family names.
if (SUCCEEDED(hr))
{
hr = pFontFamily->GetFamilyNames(&pFamilyNames);
}
// Select the first locale. This is OK, because we are not displaying the family name.
index = 0;
// Get the length of the family name.
if (SUCCEEDED(hr))
{
hr = pFamilyNames->GetStringLength(index, &length);
}
if (SUCCEEDED(hr))
{
// Allocate a new string.
name = new (std::nothrow) wchar_t[length+1];
if (name == NULL)
{
hr = E_OUTOFMEMORY;
}
}
// Get the actual family name.
if (SUCCEEDED(hr))
{
hr = pFamilyNames->GetString(index, name, length+1);
}
if (SUCCEEDED(hr))
{
// Calculate the font size.
fontSize = (float) -MulDiv(lf.lfHeight, 96, GetDeviceCaps(hdc, LOGPIXELSY));
}
// Create a text format using the converted font information.
if (SUCCEEDED(hr))
{
hr = g_pDWriteFactory->CreateTextFormat(
name, // Font family name.
NULL,
pFont->GetWeight(),
pFont->GetStyle(),
pFont->GetStretch(),
fontSize,
L"en-us",
&g_pTextFormat
);
}
// Create a text layout.
if (SUCCEEDED(hr))
{
hr = g_pDWriteFactory->CreateTextLayout(
text,
textLength,
g_pTextFormat,
1024.0f,
480.0f,
&g_pTextLayout
);
}
// Underline and strikethrough are part of a LOGFONT structure, but are not
// part of a DWrite font object so we must set them using the text layout.
if(lf.lfUnderline)
{
DWRITE_TEXT_RANGE textRange = {0, textLength};
g_pTextLayout->SetUnderline(true, textRange);
}
if(lf.lfStrikeOut)
{
DWRITE_TEXT_RANGE textRange = {0, textLength};
g_pTextLayout->SetStrikethrough(true, textRange);
}
// Create a bitmap render target for our custom renderer.
if (SUCCEEDED(hr))
{
hr = g_pGdiInterop->CreateBitmapRenderTarget(hdc, r.right, r.bottom, &g_pBitmapRenderTarget);
}
// Create default rendering params for our custom renderer.
if (SUCCEEDED(hr))
{
hr = g_pDWriteFactory->CreateRenderingParams(&g_pRenderingParams);
}
if (SUCCEEDED(hr))
{
// Initialize the custom renderer class.
g_pGdiTextRenderer = new (std::nothrow) GdiTextRenderer(g_pBitmapRenderTarget, g_pRenderingParams);
}
// Clean up local interfaces.
SafeRelease(&pFontFamily);
SafeRelease(&pFont);
SafeRelease(&pFamilyNames);
}
return hr;
}
void wmain()
{
IDWriteFactory* pDWriteFactory = NULL;
HRESULT hr = DWriteCreateFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(&pDWriteFactory)
);
IDWriteFontCollection* pFontCollection = NULL;
// Get the system font collection.
if (SUCCEEDED(hr))
{
hr = pDWriteFactory->GetSystemFontCollection(&pFontCollection);
}
UINT32 familyCount = 0;
// Get the number of font families in the collection.
if (SUCCEEDED(hr))
{
familyCount = pFontCollection->GetFontFamilyCount();
}
for (UINT32 i = 0; i < familyCount; ++i)
{
IDWriteFontFamily* pFontFamily = NULL;
// Get the font family.
if (SUCCEEDED(hr))
{
hr = pFontCollection->GetFontFamily(i, &pFontFamily);
}
IDWriteLocalizedStrings* pFamilyNames = NULL;
// Get a list of localized strings for the family name.
if (SUCCEEDED(hr))
{
hr = pFontFamily->GetFamilyNames(&pFamilyNames);
}
UINT32 index = 0;
BOOL exists = false;
wchar_t localeName[LOCALE_NAME_MAX_LENGTH];
if (SUCCEEDED(hr))
{
// Get the default locale for this user.
int defaultLocaleSuccess = GetUserDefaultLocaleName(localeName, LOCALE_NAME_MAX_LENGTH);
// If the default locale is returned, find that locale name, otherwise use "en-us".
if (defaultLocaleSuccess)
{
hr = pFamilyNames->FindLocaleName(localeName, &index, &exists);
}
else
{
hr = pFamilyNames->FindLocaleName(L"en-us", &index, &exists);
}
}
// If the specified locale doesn't exist, select the first on the list.
if (!exists)
index = 0;
UINT32 length = 0;
// Get the string length.
if (SUCCEEDED(hr))
{
hr = pFamilyNames->GetStringLength(index, &length);
}
// Allocate a string big enough to hold the name.
wchar_t* name = new (std::nothrow) wchar_t[length+1];
if (name == NULL)
{
hr = E_OUTOFMEMORY;
}
// Get the family name.
if (SUCCEEDED(hr))
{
hr = pFamilyNames->GetString(index, name, length+1);
}
if (SUCCEEDED(hr))
{
// Print out the family name.
wprintf(L"%s\n", name);
}
SafeRelease(&pFontFamily);
SafeRelease(&pFamilyNames);
delete [] name;
}
SafeRelease(&pFontCollection);
SafeRelease(&pDWriteFactory);
}
