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scan directories recursively for UWP app icon #107

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d5e9a8c
scan directories recursively for UWP app icon
pb-kh Mar 2, 2026
efd956a
scan directories recursively for UWP app icon
pb-kh Mar 2, 2026
71fbb39
Merge branch 'uwp-icon-search' of https://github.com/its-bubble-gum/A…
pb-kh Mar 8, 2026
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171 changes: 108 additions & 63 deletions Sources/AltAppSwitcher/AppMode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -675,6 +675,110 @@ static bool GetAppInfoFromLnk(const wchar_t* userModelID, wchar_t* outIconPath,
return found;
}

static void FindLogoInDir(wchar_t parentDir[MAX_PATH], wchar_t* logoNoExt, wchar_t* outIconPath, bool lightTheme, uint32_t* maxSize) {
wchar_t parentDirStar[MAX_PATH];
wcscpy(parentDirStar, parentDir);
wcscat(parentDirStar, L"/*");

WIN32_FIND_DATAW findData;
HANDLE hFind = INVALID_HANDLE_VALUE;
hFind = FindFirstFileW(parentDirStar, &findData);

if (hFind == INVALID_HANDLE_VALUE) {
return;
}

bool foundAny = false;

// https://learn.microsoft.com/en-us/windows/apps/design/style/iconography/app-icon-construction
while (FindNextFileW(hFind, &findData) != 0) {
const wchar_t* postLogoName = NULL;
{
const wchar_t* at = wcsstr(findData.cFileName, logoNoExt);
if (at == != findData.cFileName)
continue;
postLogoName = at + wcslen(logoNoExt);
}

uint32_t targetsize = 0;
{
const wchar_t* at = wcsstr(postLogoName, L"targetsize-");
if (at != NULL) {
at += (sizeof(L"targetsize-") / sizeof(wchar_t)) - 1;
targetsize = wcstol(at, NULL, 10);
}
}

const bool lightUnplated = wcsstr(postLogoName, L"altform-lightunplated") != NULL;
const bool unplated = wcsstr(postLogoName, L"altform-unplated") != NULL;
const bool constrast = wcsstr(postLogoName, L"contrast") != NULL;
const bool matchingTheme = !constrast
&& ((lightTheme && lightUnplated)
|| (!lightTheme && unplated));

if (targetsize > *maxSize || !foundAny || (targetsize == *maxSize && matchingTheme)) {
*maxSize = targetsize;
foundAny = true;
wcscpy(outIconPath, parentDir);
wcscat(outIconPath, L"/");
wcscat(outIconPath, findData.cFileName);
}
}
}

static void ScanDirForAppLogoRecursive(wchar_t dir[MAX_PATH], wchar_t* logoPath, uint32_t logoPathDepth, wchar_t* logoName, bool lightTheme, uint32_t* maxSize, wchar_t* outIconPath) {
if (logoPathDepth == 0) {
FindLogoInDir(dir, logoName, outIconPath, lightTheme, maxSize);
}

wchar_t dirWildcard[MAX_PATH];
wcscpy(dirWildcard, dir);
wcscat(dirWildcard, L"/*");

WIN32_FIND_DATAW findData;
HANDLE hFind = INVALID_HANDLE_VALUE;
hFind = FindFirstFileW(dirWildcard, &findData);

if (hFind == INVALID_HANDLE_VALUE) {
return;
}

while (FindNextFileW(hFind, &findData) != 0) {
if (!wcscmp(findData.cFileName, L".") || !wcscmp(findData.cFileName, L".."))
continue;

if (findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
wchar_t childDir[MAX_PATH];
wcscpy(childDir, dir);
wcscat(childDir, L"/");
wcscat(childDir, findData.cFileName);

wchar_t* nextLogoPath = logoPath;
uint32_t nextLogoPathDepth = logoPathDepth;
if (logoPathDepth && !wcscmp(findData.cFileName, logoPath)) {
nextLogoPath = logoPath + wcslen(logoPath) + 1;
nextLogoPathDepth--;
}

ScanDirForAppLogoRecursive(childDir, nextLogoPath, nextLogoPathDepth, logoName, lightTheme, maxSize, outIconPath);
}
}
}

static void FindLogoFromProp(wchar_t packagePath[MAX_PATH], wchar_t logoPath[MAX_PATH], wchar_t* logoName, bool lightTheme, wchar_t* outIconPath) {
uint32_t logoPathDepth = 1;
for (wchar_t* c = logoPath; *c; c++) {
if (*c == '/') {
logoPathDepth++;
*c = '\0';
c++;
}
}

uint32_t maxSize = 0;
ScanDirForAppLogoRecursive(packagePath, logoPath, logoPathDepth, logoName, lightTheme, &maxSize, outIconPath);
}

// https://github.com/microsoft/Windows-classic-samples/blob/main/Samples/AppxPackingDescribeAppx/cpp/DescribeAppx.cpp
static void GetAppInfoFromManifest(HANDLE process, const wchar_t* userModelID, wchar_t* outIconPath, wchar_t* outAppName, bool lightTheme)
{
Expand Down Expand Up @@ -778,74 +882,15 @@ static void GetAppInfoFromManifest(HANDLE process, const wchar_t* userModelID, w
} else
wcscpy(outAppName, displayName);
}
wchar_t logoPath[MAX_PATH];
wcscpy(logoPath, packagePath);
wcscat(logoPath, L"/");
wcscat(logoPath, logoProp);

wchar_t parentDir[MAX_PATH];
wcscpy(parentDir, logoPath);
*wcsrchr(parentDir, L'/') = L'\0';

wchar_t parentDirStar[MAX_PATH];
wcscpy(parentDirStar, parentDir);
wcscat(parentDirStar, L"/*");

wchar_t logoNoExt[MAX_PATH];
wchar_t* atLastSlash = wcsrchr(logoProp, L'/');
wcscpy(logoNoExt, atLastSlash ? atLastSlash + 1 : logoProp);
wcsrchr(logoNoExt, L'.')[0] = L'\0';

wchar_t ext[16];
wcscpy(ext, wcsrchr(logoProp, L'.'));

WIN32_FIND_DATAW findData;
HANDLE hFind = INVALID_HANDLE_VALUE;
hFind = FindFirstFileW(parentDirStar, &findData);

if (hFind == INVALID_HANDLE_VALUE) {
CoUninitialize();
return;
}

uint32_t maxSize = 0;
bool foundAny = false;

// https://learn.microsoft.com/en-us/windows/apps/design/style/iconography/app-icon-construction
while (FindNextFileW(hFind, &findData) != 0) {
const wchar_t* postLogoName = NULL;
{
const wchar_t* at = wcsstr(findData.cFileName, logoNoExt);
if (at != findData.cFileName) // "StartsWith" rather than "Contains" (contains is incorrect why latest outlook)
continue;
postLogoName = at + wcslen(logoNoExt);
}

uint32_t targetsize = 0;
{
const wchar_t* at = wcsstr(postLogoName, L"targetsize-");
if (at != NULL) {
at += (sizeof(L"targetsize-") / sizeof(wchar_t)) - 1;
targetsize = wcstol(at, NULL, 10);
}
}

const bool lightUnplated = wcsstr(postLogoName, L"altform-lightunplated") != NULL;
const bool unplated = wcsstr(postLogoName, L"altform-unplated") != NULL;
const bool constrast = wcsstr(postLogoName, L"contrast") != NULL;
const bool matchingTheme = !constrast
&& ((lightTheme && lightUnplated)
|| (!lightTheme && unplated));

if (targetsize > maxSize || !foundAny || (targetsize == maxSize && matchingTheme)) {
maxSize = targetsize;
foundAny = true;
wcscpy(outIconPath, parentDir);
wcscat(outIconPath, L"/");
wcscat(outIconPath, findData.cFileName);
}
}
*atLastSlash = '\0';

FindLogoFromProp(packagePath, logoProp, logoNoExt, lightTheme, outIconPath);
CoUninitialize();
}

Expand Down Expand Up @@ -1066,8 +1111,8 @@ static BOOL IsRunWindow(HWND hwnd)
void GetAppInfos(DWORD PID, struct StaticData* staticData, const wchar_t* aumid, GpBitmap** outIcon, wchar_t* outAppName)
{
bool found = GetAppInfoFromMap(&staticData->UWPIconMap, aumid, outIcon, outAppName);
if (!found) {
static wchar_t iconPath[MAX_PATH] = { };
if (! found) {
static wchar_t iconPath[MAX_PATH] = {};
int iconIdx = 0;
iconPath[0] = L'\0';
found = GetAppInfoFromLnk(aumid, iconPath, outAppName, &iconIdx);
Expand Down