virtual void InitRHI()
{
TextureCubeRHI = RHICreateTextureCube(Size, Format, NumMips, 0, NULL);
TextureRHI = TextureCubeRHI;
if (SourceData)
{
check(SourceData->Num() > 0);
const int32 BlockBytes = GPixelFormats[Format].BlockBytes;
int32 MipBaseIndex = 0;
for (int32 MipIndex = 0; MipIndex < NumMips; MipIndex++)
{
const int32 MipSize = 1 << (NumMips - MipIndex - 1);
const int32 CubeFaceBytes = MipSize * MipSize * BlockBytes;
for (int32 CubeFace = 0; CubeFace < CubeFace_MAX; CubeFace++)
{
uint32 DestStride = 0;
uint8* DestBuffer = (uint8*)RHILockTextureCubeFace(TextureCubeRHI, CubeFace, 0, MipIndex, RLM_WriteOnly, DestStride, false);
// Handle DestStride by copying each row
for (int32 Y = 0; Y < MipSize; Y++)
{
uint8* DestPtr = ((uint8*)DestBuffer + Y * DestStride);
const int32 SourceIndex = MipBaseIndex + CubeFace * CubeFaceBytes + Y * MipSize * BlockBytes;
const uint8* SourcePtr = &(*SourceData)[SourceIndex];
FMemory::Memcpy(DestPtr, SourcePtr, MipSize * BlockBytes);
}
RHIUnlockTextureCubeFace(TextureCubeRHI, CubeFace, 0, MipIndex, false);
}
MipBaseIndex += CubeFaceBytes * CubeFace_MAX;
}
if (!GIsEditor)
{
// Toss the source data now that we've created the cubemap
// Note: can't do this if we ever use this texture resource in the editor and want to save the data later
DEC_MEMORY_STAT_BY(STAT_ReflectionCaptureMemory,SourceData->GetAllocatedSize());
SourceData->Empty();
}
}
// Create the sampler state RHI resource.
FSamplerStateInitializerRHI SamplerStateInitializer
(
SF_Trilinear,
AM_Clamp,
AM_Clamp,
AM_Clamp
);
SamplerStateRHI = RHICreateSamplerState(SamplerStateInitializer);
INC_MEMORY_STAT_BY(STAT_ReflectionCaptureTextureMemory,CalcTextureSize(Size,Size,Format,NumMips) * 6);
}
/**
* Called when the resource is initialized. This is only called by the rendering thread.
*/
virtual void InitRHI() override
{
INC_DWORD_STAT_BY( STAT_TextureMemory, TextureSize );
INC_DWORD_STAT_FNAME_BY( LODGroupStatName, TextureSize );
// Create the RHI texture.
uint32 TexCreateFlags = (Owner->SRGB ? TexCreate_SRGB : 0) | TexCreate_OfflineProcessed;
FRHIResourceCreateInfo CreateInfo;
TextureCubeRHI = RHICreateTextureCube( Owner->GetSizeX(), Owner->GetPixelFormat(), Owner->GetNumMips(), TexCreateFlags, CreateInfo );
TextureRHI = TextureCubeRHI;
RHIBindDebugLabelName(TextureRHI, *Owner->GetName());
RHIUpdateTextureReference(Owner->TextureReference.TextureReferenceRHI,TextureRHI);
// Read the mip-levels into the RHI texture.
int32 NumMips = Owner->GetNumMips();
for( int32 FaceIndex=0; FaceIndex<6; FaceIndex++ )
{
for(int32 MipIndex=0; MipIndex < NumMips; MipIndex++)
{
if( MipData[FaceIndex][MipIndex] != NULL )
{
uint32 DestStride;
void* TheMipData = RHILockTextureCubeFace( TextureCubeRHI, FaceIndex, 0, MipIndex, RLM_WriteOnly, DestStride, false );
GetData( FaceIndex, MipIndex, TheMipData, DestStride );
RHIUnlockTextureCubeFace( TextureCubeRHI, FaceIndex, 0, MipIndex, false );
}
}
}
// Create the sampler state RHI resource.
FSamplerStateInitializerRHI SamplerStateInitializer
(
GSystemSettings.TextureLODSettings.GetSamplerFilter( Owner ),
AM_Clamp,
AM_Clamp,
AM_Clamp
);
SamplerStateRHI = RHICreateSamplerState(SamplerStateInitializer);
// Set the greyscale format flag appropriately.
EPixelFormat PixelFormat = Owner->GetPixelFormat();
bGreyScaleFormat = (PixelFormat == PF_G8) || (PixelFormat == PF_BC4);
}
