/**
* Useful for stats in the editor.
*/
void FTextureLODSettings::ComputeInGameMaxResolution(int32 LODBias, UTexture &Texture, uint32 &OutSizeX, uint32 &OutSizeY) const
{
uint32 ImportedSizeX = FMath::Trunc(Texture.GetSurfaceWidth());
uint32 ImportedSizeY = FMath::Trunc(Texture.GetSurfaceHeight());
const FTextureLODGroup& LODGroup = GetTextureLODGroup((TextureGroup)Texture.LODGroup);
uint32 SourceLOD = FMath::Max(FMath::CeilLogTwo(ImportedSizeX), FMath::CeilLogTwo(ImportedSizeY));
uint32 MinLOD = FMath::Max(uint32(UTexture2D::GetMinTextureResidentMipCount() - 1), (uint32)LODGroup.MinLODMipCount);
uint32 MaxLOD = FMath::Min(uint32(GMaxTextureMipCount - 1), (uint32)LODGroup.MaxLODMipCount);
uint32 GameLOD = FMath::Min(SourceLOD, FMath::Clamp(SourceLOD - LODBias, MinLOD, MaxLOD));
uint32 DeltaLOD = SourceLOD - GameLOD;
OutSizeX = ImportedSizeX >> DeltaLOD;
OutSizeY = ImportedSizeY >> DeltaLOD;
}
void UTextureThumbnailRenderer::GetThumbnailSize(UObject* Object, float Zoom, uint32& OutWidth, uint32& OutHeight) const
{
UTexture* Texture = Cast<UTexture>(Object);
UTextureLightProfile* TextureLightProfile = Cast<UTextureLightProfile>(Object);
if (TextureLightProfile)
{
// otherwise a 1D texture would result in a very boring thumbnail
OutWidth = 192;
OutHeight = 192;
return;
}
if (Texture != nullptr)
{
OutWidth = FMath::TruncToInt(Zoom * (float)Texture->GetSurfaceWidth());
OutHeight = FMath::TruncToInt(Zoom * (float)Texture->GetSurfaceHeight());
}
else
{
OutWidth = OutHeight = 0;
}
}