C言語／C++/dw_glyphcount - Sample is best!

開発環境	Microsoft Visual Studio Community 2017
実行環境	Windows 10 Home (64bit)
プロジェクトの種類	Visual C++／空のプロジェクト
プロジェクト名	dw_glyphcount

dw_glyphcount.cpp

// Unicode文字セット
 
#pragma comment(lib, "dwrite")
 
#include <dwrite.h>
#include <stdio.h>
 
template <class T> inline void SafeRelease(T **ppT)
{
	if (*ppT) {
		(*ppT)->Release();
		*ppT = NULL;
	}
}
 
int wmain()
{
	HRESULT hr;
	IDWriteFactory* pDWriteFactory = NULL;
	hr = DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory),
		reinterpret_cast<IUnknown**>(&pDWriteFactory));
 
	IDWriteFontCollection* pFontCollection = NULL;
	hr = pDWriteFactory->GetSystemFontCollection(&pFontCollection);
 
	int familyCount = pFontCollection->GetFontFamilyCount();
 
	// code point
	const int cp_begin = 0;
	const int cp_end = 0x10ffff;
	static UINT8 cp_count[0x110000];
 
	for (int i = 0; i < familyCount; i++) {
		IDWriteFontFamily* pFontFamily = NULL;
		hr = pFontCollection->GetFontFamily(i, &pFontFamily);
 
		IDWriteLocalizedStrings* pFamilyNames = NULL;
		hr = pFontFamily->GetFamilyNames(&pFamilyNames);
 
		WCHAR name[32];
		hr = pFamilyNames->GetString(0, name, _countof(name));
 
		IDWriteFont* pFont = NULL;
		hr = pFontFamily->GetFirstMatchingFont(DWRITE_FONT_WEIGHT_NORMAL,
			DWRITE_FONT_STRETCH_NORMAL, DWRITE_FONT_STYLE_NORMAL, &pFont);
 
		int count = 0;
		for (int cp = cp_begin; cp <= cp_end; cp++) {
			BOOL exists;
			hr = pFont->HasCharacter(cp, &exists);
 
			if (exists) {
				cp_count[cp]++;
				count++;
			}
		}
		wprintf(L"%u\t\"%s\"\t%d\n", i, name, count);
 
		SafeRelease(&pFont);
		SafeRelease(&pFamilyNames);
		SafeRelease(&pFontFamily);
	}
 
	int count = 0;
	int start = -1;
	for (int cp = cp_begin; cp <= cp_end; cp++) {
		if (cp_count[cp]) {
			count++;
			if (start == -1) {
				start = cp;
			}
		}
		else {
			if (start != -1) {
				wprintf(L"U+%04X\tU+%04X\t%d\n", start, cp - 1, cp - start);
				start = -1;
			}
		}
	}
	if (start != -1) {
		wprintf(L"U+%04X\tU+%04X\t%d\n", start, cp_end, cp_end + 1 - start);
	}
	wprintf(L"(%d)\n", count);
 
	SafeRelease(&pFontCollection);
	SafeRelease(&pDWriteFactory);
	return 0;
}