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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(67.2, 85%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EY%3C/text%3E%3C/svg%3E)
Is there something in c++? (Windows API/ WinRT) I've tried some solutions online and none of them work. I didn't find anything useful on Github either. I want to display the icons regardless of whether the exe is still there, so I want to save the icon; only 1 size is enough. (I think the difficult part is saving the HIcon, I can't find anything about the process.)
Have you tried any of the suggested solutions in this SO thread ? -- https://stackoverflow.com/questions/2289894/how-can-i-save-hicon-to-an-ico-file
SaveIconToFile from https://github.com/Skight/wndspy/blob/b89cc2df88ca3e58b26be491814008aaf6f11122/Source/Contrib/SaveIcon.cpp works for me (tested on Jumbo icon of Notepad (SHGetFileInfo with SHGFI_SYSICONINDEX + SHGetImageList with SHIL_JUMBO )
OK, I'll test that right away. I cobbled something together with AI and it works perfectly (#include <wincodec.h>). But I'm not really sure what's going on there, lol.
void Tester::SaveImageAsPng(HICON hIcon, const wchar_t* filePath) { IWICImagingFactory* pWICFactory = nullptr; IWICBitmap* pWICBitmap = nullptr; IWICStream* pWICStream = nullptr; // Schritt 1: Initialisieren Sie die WIC-Factory. CoCreateInstance(CLSID_WICImagingFactory, nullptr, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pWICFactory)); // Schritt 2: Erstellen Sie das Bitmap aus dem Icon. HRESULT hr = S_OK; hr = pWICFactory->CreateBitmapFromHICON(hIcon, &pWICBitmap); // Überprüfen Sie den Rückgabewert und behandeln Sie Fehler entsprechend. if (FAILED(hr)) { // Fehlerbehandlung... } // Schritt 3: Erstellen Sie einen WIC-Stream zum Speichern des Bitmaps als PNG-Datei. hr = pWICFactory->CreateStream(&pWICStream); if (SUCCEEDED(hr)) { // Annahme: pszFilePath ist der Pfad zur PNG-Datei, in der das Bitmap gespeichert werden soll. hr = pWICStream->InitializeFromFilename(filePath, GENERIC_WRITE); } // Überprüfen Sie den Rückgabewert und behandeln Sie Fehler entsprechend. if (FAILED(hr)) { // Fehlerbehandlung... } // Schritt 4: Erstellen Sie einen WIC-Encoder für PNG. IWICBitmapEncoder* pWICBitmapEncoder = nullptr; hr = pWICFactory->CreateEncoder(GUID_ContainerFormatPng, nullptr, &pWICBitmapEncoder); if (SUCCEEDED(hr)) { hr = pWICBitmapEncoder->Initialize(pWICStream, WICBitmapEncoderNoCache); } // Überprüfen Sie den Rückgabewert und behandeln Sie Fehler entsprechend. if (FAILED(hr)) { // Fehlerbehandlung... } // Schritt 5: Erstellen Sie einen WIC-Bitmap-Frame und fügen Sie das Bitmap hinzu. IWICBitmapFrameEncode* pWICFrameEncode = nullptr; hr = pWICBitmapEncoder->CreateNewFrame(&pWICFrameEncode, nullptr); if (SUCCEEDED(hr)) { hr = pWICFrameEncode->Initialize(nullptr); } // Überprüfen Sie den Rückgabewert und behandeln Sie Fehler entsprechend. if (FAILED(hr)) { // Fehlerbehandlung... } // Schritt 6: Kopieren Sie das Bitmap in den Frame. hr = pWICFrameEncode->WriteSource(pWICBitmap, nullptr); if (SUCCEEDED(hr)) { hr = pWICFrameEncode->Commit(); } // Überprüfen Sie den Rückgabewert und behandeln Sie Fehler entsprechend. if (FAILED(hr)) { // Fehlerbehandlung... } // Schritt 7: Schließen Sie den Encoder ab. hr = pWICBitmapEncoder->Commit(); // Überprüfen Sie den Rückgabewert und behandeln Sie Fehler entsprechend. if (FAILED(hr)) { // Fehlerbehandlung... } // Schritt 8: Freigeben Sie die Ressourcen. if (pWICFrameEncode) { pWICFrameEncode->Release(); } if (pWICBitmapEncoder) { pWICBitmapEncoder->Release(); } if (pWICStream) { pWICStream->Release(); } if (pWICBitmap) { pWICBitmap->Release(); } if (pWICFactory) { pWICFactory->Release(); } }
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 34%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EXY%3C/text%3E%3C/svg%3E)
IShellItemImageFactory Exposes a method to return either icons or thumbnails for Shell items. If no thumbnail or icon is available for the requested item, a per-class icon may be provided from the Shell.
You can also use IShellItemImageFactory or directly load Icons from binary. @youki, please mark answer for completion of the question if it works.
Hello,
@Castorix31 @RLWA32 Took forever again. I tried a lot and found the following really simple solution. My question would be why with FileIO::WriteBufferAsync it “apparently” works fine without co_await, but when I use it with co_await then the PNG is 0 bytes, so empty. ...and is that a problem?
(PS: I'm using it in an unpackaged WinUI3 project.)
winrt::Windows::Foundation::IAsyncAction IconHandler::SaveThumbnailAsPngAsync()
{
// Get output folder.
auto& destinationFolder = co_await winrt::Windows::Storage::StorageFolder::GetFolderFromPathAsync(L"OutputFolderPath");
// Get output file.
auto& destFile = co_await destinationFolder.CreateFileAsync(L"test.png", CreationCollisionOption::ReplaceExisting);
auto& destFileStream = co_await destFile.OpenAsync(FileAccessMode::ReadWrite);
// Get exe thumb.
const auto& fileStorage = co_await winrt::Windows::Storage::StorageFile::GetFileFromPathAsync(winrt::to_hstring(L"ExeFilePath"));
const auto& fileThumbnail = co_await fileStorage.GetThumbnailAsync(winrt::Windows::Storage::FileProperties::ThumbnailMode::DocumentsView, 16);
Windows::Storage::Streams::Buffer inputBuffer(fileThumbnail.Size());
try
{
Windows::Storage::Streams::IBuffer iBuffer = co_await fileThumbnail.ReadAsync(inputBuffer, inputBuffer.Capacity(), Windows::Storage::Streams::InputStreamOptions::None);
// This line is not working with co_await...weird!
Windows::Storage::FileIO::WriteBufferAsync(destFile, iBuffer);
}
catch (const std::exception& e)
{
OutputDebugStringA("\nError:\n");
OutputDebugStringA(e.what());
}
}
Source: https://stackoverflow.com/questions/15494965/how-save-bitmapimage-winrt
um, already found it. That one line was unnecessary. //auto& destFileStream = co_await destFile.OpenAsync(FileAccessMode::ReadWrite);
That was stupid again. :)
Found my own post. :)
GetThumbnailAsync & GetScaledImageAsThumbnailAsync doesn't seem to work properly, at least not as expected.
In general it gets the right size or scales it (?!) but sometimes it scales the icon/image that only the white space around the icon is increased. I can't discover any difference in the files contained in the executable. Must be something like the expected quality for the method or so???