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Look for both system fonts and user fonts on Windows (#64)

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* Look for both system fonts and user fonts on Windows

* Move repeated font registry reading code to separate function

* Pass the files vector to read_fonts_from_key as a reference

* Allocate a larger filename buffer when necessary while reading fonts from registry
This commit is contained in:
Andrew Neth 2020-02-08 14:41:03 -06:00 committed by GitHub
parent d9bd7def0b
commit d0bab1212c
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 45 additions and 20 deletions
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65
src/font_file_lister_gdi.cpp
View file

@ -28,6 +28,47 @@
#include <unicode/utf16.h>
#include <Usp10.h>
static void read_fonts_from_key(HKEY hkey, agi::fs::path font_dir, std::vector<agi::fs::path> &files) {
static const auto fonts_key_name = L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Fonts";
HKEY key;
auto ret = RegOpenKeyExW(hkey, fonts_key_name, 0, KEY_QUERY_VALUE, &key);
if (ret != ERROR_SUCCESS) return;
BOOST_SCOPE_EXIT_ALL(=) { RegCloseKey(key); };
DWORD name_buf_size = SHRT_MAX;
DWORD data_buf_size = MAX_PATH;
auto font_name = new wchar_t[name_buf_size];
auto font_filename = new wchar_t[data_buf_size];
for (DWORD i = 0;; ++i) {
retry:
DWORD name_len = name_buf_size;
DWORD data_len = data_buf_size;
ret = RegEnumValueW(key, i, font_name, &name_len, NULL, NULL, reinterpret_cast<BYTE*>(font_filename), &data_len);
if (ret == ERROR_MORE_DATA) {
data_buf_size = data_len;
delete font_filename;
font_filename = new wchar_t[data_buf_size];
goto retry;
}
if (ret == ERROR_NO_MORE_ITEMS) break;
if (ret != ERROR_SUCCESS) continue;
agi::fs::path font_path(font_filename);
if (!agi::fs::FileExists(font_path))
// Doesn't make a ton of sense to do this with user fonts, but they seem to be stored as full paths anyway
font_path = font_dir / font_path;
if (agi::fs::FileExists(font_path)) // The path might simply be invalid
files.push_back(font_path);
}
delete font_name;
delete font_filename;
}
namespace {
uint32_t murmur3(const char *data, uint32_t len) {
static const uint32_t c1 = 0xcc9e2d51;
@ -62,33 +103,17 @@ uint32_t murmur3(const char *data, uint32_t len) {
}
std::vector<agi::fs::path> get_installed_fonts() {
static const auto fonts_key_name = L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Fonts";
std::vector<agi::fs::path> files;
HKEY key;
auto ret = RegOpenKeyExW(HKEY_LOCAL_MACHINE, fonts_key_name, 0, KEY_QUERY_VALUE, &key);
if (ret != ERROR_SUCCESS) return files;
BOOST_SCOPE_EXIT_ALL(=) { RegCloseKey(key); };
wchar_t fdir[MAX_PATH];
SHGetFolderPathW(NULL, CSIDL_FONTS, NULL, 0, fdir);
agi::fs::path font_dir(fdir);
for (DWORD i = 0;; ++i) {
wchar_t font_name[SHRT_MAX], font_filename[MAX_PATH];
DWORD name_len = sizeof(font_name);
DWORD data_len = sizeof(font_filename);
// System fonts
read_fonts_from_key(HKEY_LOCAL_MACHINE, font_dir, files);
ret = RegEnumValueW(key, i, font_name, &name_len, NULL, NULL, reinterpret_cast<BYTE *>(font_filename), &data_len);
if (ret == ERROR_NO_MORE_ITEMS) break;
if (ret != ERROR_SUCCESS) continue;
agi::fs::path font_path(font_filename);
if (!agi::fs::FileExists(font_path))
font_path = font_dir / font_path;
files.push_back(font_path);
}
// User fonts
read_fonts_from_key(HKEY_CURRENT_USER, font_dir, files);
return files;
}