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977f76dd9e
Resize converts Pow22 to sRGB because it can not output Pow22 #preflight 62bb22ef101ad5bf64ae7b2b #rb fabian.giesen [CL 20864029 by charles bloom in ue5-main branch]
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "TextureBuildUtilities.h"
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#include "Misc/DataDrivenPlatformInfoRegistry.h"
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namespace UE
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{
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namespace TextureBuildUtilities
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{
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// Return true if texture format name is HDR
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TEXTUREBUILDUTILITIES_API bool TextureFormatIsHdr(FName const& InName)
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{
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// TextureFormatRemovePrefixFromName first !
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static FName NameRGBA16F(TEXT("RGBA16F"));
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static FName NameRGBA32F(TEXT("RGBA32F"));
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static FName NameR16F(TEXT("R16F"));
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static FName NameR32F(TEXT("R32F"));
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static FName NameBC6H(TEXT("BC6H"));
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if ( InName == NameRGBA16F ) return true;
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if ( InName == NameRGBA32F ) return true;
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if ( InName == NameR16F ) return true;
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if ( InName == NameR32F ) return true;
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if ( InName == NameBC6H ) return true;
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return false;
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}
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TEXTUREBUILDUTILITIES_API const FName TextureFormatRemovePrefixFromName(FName const& InName, FName& OutPrefix)
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{
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FString NameString = InName.ToString();
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// Format names may have one of the following forms:
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// - PLATFORM_PREFIX_FORMAT
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// - PLATFORM_FORMAT
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// - PREFIX_FORMAT
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// - FORMAT
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// We have to remove the platform prefix first, if it exists.
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// Then we detect a non-platform prefix (such as codec name)
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// and split the result into explicit FORMAT and PREFIX parts.
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for (FName PlatformName : FDataDrivenPlatformInfoRegistry::GetSortedPlatformNames(EPlatformInfoType::AllPlatformInfos))
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{
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FString PlatformTextureFormatPrefix = PlatformName.ToString();
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PlatformTextureFormatPrefix += TEXT('_');
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if (NameString.StartsWith(PlatformTextureFormatPrefix, ESearchCase::IgnoreCase))
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{
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// Remove platform prefix and proceed with non-platform prefix detection.
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NameString = NameString.RightChop(PlatformTextureFormatPrefix.Len());
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break;
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}
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}
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int32 UnderscoreIndex = INDEX_NONE;
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if (NameString.FindChar(TCHAR('_'), UnderscoreIndex))
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{
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// Non-platform prefix, we want to keep these
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OutPrefix = *NameString.Left(UnderscoreIndex + 1);
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return *NameString.RightChop(UnderscoreIndex + 1);
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}
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return *NameString;
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}
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TEXTUREBUILDUTILITIES_API ERawImageFormat::Type GetVirtualTextureBuildIntermediateFormat(const FTextureBuildSettings& BuildSettings)
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{
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const FName TextureFormatName = TextureFormatRemovePrefixFromName(BuildSettings.TextureFormatName);
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// note: using RGBA16F when the Source is HDR but the output is not HDR is not needed
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// you could use BGRA8 intermediate in that case
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// but it's rare and not a big problem, so leave it alone for now
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const bool bIsHdr = BuildSettings.bHDRSource || TextureFormatIsHdr(TextureFormatName);
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if (bIsHdr)
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{
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return ERawImageFormat::RGBA16F;
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}
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else if ( TextureFormatName == "G16" )
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{
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return ERawImageFormat::G16;
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}
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else
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{
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return ERawImageFormat::BGRA8;
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}
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}
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} // namespace
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} |