UE4 FColor数据保存成图片

1、TArray<FColor>或是FColor*可通过ImageWrapper直接保存成图片

 1 void URenderCineCameraLibrary::SaveColorToFile(FColor* SourceColor, uint32 Width, uint32 Height)
 2 {
 3     check(SourceColor != nullptr);
 4     
 5     /*// FColor* SurfaceColor ...png
 6     for (FColor& Color : SurfaceColor)
 7     {
 8         Color.A = 255;
 9     }
10 
11     TArray<uint8> TextureData;
12     TextureData.AddUninitialized(Width * Height * sizeof(FColor));
13     FMemory::Memcpy(TextureData.GetData(), (uint8*)SourceColor, Width * Height * sizeof(FColor));
14     if (TextureData.Num() <= 0)
15     {
16         UE_LOG(LogTemp, Error, TEXT("TextureData is empty ..."));
17         return;
18     }*/
19 
20     // save png
21     IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
22     TSharedPtr<IImageWrapper> ImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::JPEG);
23     ImageWrapper->SetRaw(SourceColor, Width * Height * sizeof(FColor), Width, Height, ERGBFormat::BGRA, 8);
24     
25 
26     const TArray64<uint8>& PNGData = ImageWrapper->GetCompressed(100);
27 
28     FString FileName = TEXT("D:\\CineCapture1.jpg");
29     FFileHelper::SaveArrayToFile(PNGData, *FileName);
30     ImageWrapper.Reset();
31 }

2、将UTexture2D保存成图片

 1 void URenderCineCameraLibrary::SaveTextureToFile(UTexture2D* SourceTex)
 2 {
 3     check(SourceTex);
 4     int32 Width = SourceTex->GetSizeX();
 5     int32 Height = SourceTex->GetSizeY();
 6 
 7     FTexture2DMipMap& MipMap = SourceTex->GetPlatformData()->Mips[0];
 8     void* Data = MipMap.BulkData.Lock(LOCK_READ_ONLY);
 9 
10     TArray<uint8> TextureData;
11     TextureData.AddUninitialized(Width * Height * sizeof(FColor));
12     FMemory::Memcpy(TextureData.GetData(), (uint8*)Data, Width * Height * sizeof(FColor));
13     if (TextureData.Num() <= 0)
14     {
15         UE_LOG(LogTemp, Error, TEXT("TextureData is empty ..."));
16         return;
17     }
18 
19     // save png
20     IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
21     TSharedPtr<IImageWrapper> ImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::JPEG);
22     ImageWrapper->SetRaw(TextureData.GetData(), Width * Height * sizeof(FColor), Width, Height, ERGBFormat::BGRA, 8);
23 
24 
25     const TArray64<uint8>& PNGData = ImageWrapper->GetCompressed(100);
26 
27     FString FileName = TEXT("D:\\CineTexture.jpg");
28     FFileHelper::SaveArrayToFile(PNGData, *FileName);
29     ImageWrapper.Reset();
30     
31 
32     MipMap.BulkData.Unlock();
33 }