Load PNG Image from disk

Development Programming & Scripting C++
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1

Hello, I’m trying to load a image from a file in the disk and convert it to a UTexture2D but unreal keeps crashing.

I already tried to use LoadObject, but unreal keeps crashing.

Does anyone know a solution?

FString FullPath = FPlatformProcess::UserDir() + "Game/logos/countries/ad.png"
if(LoadObject<UTexture2D>(NULL, *FullPath)){

}
2

I wrote this for my own library not long ago. This should work for you.


UTexture2D* UImageFunctionLibrary::FileToTexture2d(FString File) {

	FString contentPath = FPaths::ProjectContentDir();
	FString fullContentPath = FPaths::ConvertRelativePathToFull(contentPath);
	FString FullPath = fullContentPath + File;
	UTexture2D* texture = nullptr;
	if (FullPath.Len() > 0) {
		FullPath.ReplaceInline(TEXT("\\"), TEXT("/"), ESearchCase::CaseSensitive);
		FullPath.ReplaceInline(TEXT("//"), TEXT("/"), ESearchCase::CaseSensitive);
		FullPath.RemoveFromStart(TEXT("/"));
		FullPath.RemoveFromEnd(TEXT("/"));
		FPlatformMisc::NormalizePath(FullPath);
		texture = FImageUtils::ImportFileAsTexture2D(FullPath);
	}
	return texture;
}
3

This worked.
Many thanks mate <3

4

yeah LoadObject wont work for disk file its for cooked uassets only thats why it crashes. you need ImageWrapper route.

quick c++ way:
FString Path = FPaths::ProjectSavedDir() + TEXT(“logos/ad.png”);
UTexture2D* Tex = FImageUtils::ImportFileAsTexture2D(Path);
if(Tex) MyMesh->SetTextureParam…

for bp just use Import File as Texture 2D node without file:// prefix, just normal path. also check file exists before you read it, if its still copying you get empty bytes and crash.

dont do it on game thread for big pngs — decode async or you hitch

btw runtime directory watcher from fab Runtime Directory Watcher — Hot-Folder File Events & Async Texture Loader | Fab worked for me