Add support for HEIF and WEBP to command-line tools (#268)

DirectXTex/DirectXTex.h

@@ -819,6 +819,7 @@ namespace DirectX
         WIC_CODEC_GIF,              // Graphics Interchange Format  (.gif)
         WIC_CODEC_WMP,              // Windows Media Photo / HD Photo / JPEG XR (.hdp, .jxr, .wdp)
         WIC_CODEC_ICO,              // Windows Icon (.ico)
+        WIC_CODEC_HEIF,             // High Efficiency Image File (.heif, .heic)
     };
 
     REFGUID __cdecl GetWICCodec(_In_ WICCodecs codec) noexcept;

DirectXTex/DirectXTexUtil.cpp

@@ -270,6 +270,10 @@ REFGUID DirectX::GetWICCodec(WICCodecs codec) noexcept
     case WIC_CODEC_ICO:
         return GUID_ContainerFormatIco;
 
+    case WIC_CODEC_HEIF:
+        // This requires installing https://aka.ms/heif
+        return GUID_ContainerFormatHeif;
+
     default:
         return GUID_NULL;
     }

DirectXTex/DirectXTexWIC.cpp

@@ -1569,7 +1569,7 @@ HRESULT DirectX::SaveToWICFile(
     if (FAILED(hr))
     {
         stream.Reset();
-        DeleteFileW(szFile);
+        std::ignore = DeleteFileW(szFile);
         return hr;
     }
 
@@ -1611,7 +1611,7 @@ HRESULT DirectX::SaveToWICFile(
     if (FAILED(hr))
     {
         stream.Reset();
-        DeleteFileW(szFile);
+        std::ignore = DeleteFileW(szFile);
         return hr;
     }