void FTextureSource::Compress()
{
if (CanPNGCompress())
{
uint8* BulkDataPtr = (uint8*)BulkData.Lock(LOCK_READ_WRITE);
IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>( FName("ImageWrapper") );
IImageWrapperPtr ImageWrapper = ImageWrapperModule.CreateImageWrapper( EImageFormat::PNG );
// TODO: TSF_BGRA8 is stored as RGBA, so the R and B channels are swapped in the internal png. Should we fix this?
ERGBFormat::Type RawFormat = (Format == TSF_G8) ? ERGBFormat::Gray : ERGBFormat::RGBA;
if ( ImageWrapper.IsValid() && ImageWrapper->SetRaw( BulkDataPtr, BulkData.GetBulkDataSize(), SizeX, SizeY, RawFormat, Format == TSF_RGBA16 ? 16 : 8 ) )
{
const TArray<uint8>& CompressedData = ImageWrapper->GetCompressed();
if ( CompressedData.Num() > 0 )
{
BulkDataPtr = (uint8*)BulkData.Realloc(CompressedData.Num());
FMemory::Memcpy(BulkDataPtr, CompressedData.GetTypedData(), CompressedData.Num());
BulkData.Unlock();
bPNGCompressed = true;
BulkData.StoreCompressedOnDisk(ECompressionFlags::COMPRESS_None);
}
}
}
else
{
//Can't PNG compress so just zlib compress the lot when its serialized out to disk.
BulkData.StoreCompressedOnDisk(ECompressionFlags::COMPRESS_ZLIB);
}
}
void FSSTBatchCombinerModule::PluginButtonClicked()
{
TArray<FString> OutFileNames;
TArray<FString> OutFileNames2;
FDesktopPlatformModule::Get()->OpenFileDialog(nullptr, "select First Image Files", "", "", "Image Files (*.png)|*.png", 1, OutFileNames);
FDesktopPlatformModule::Get()->OpenFileDialog(nullptr, "select Second Image Files", "", "", "Image Files (*.png)|*.png", 1, OutFileNames2);
if (OutFileNames.Num() && OutFileNames2.Num())
{
if (OutFileNames.Num() != OutFileNames2.Num())
{
FString DialogText = "Error! first set quantity does not match second set!";
FMessageDialog::Open(EAppMsgType::Ok, FText::FromString(DialogText));
return;
}
IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
for (int32 i = 0; i < OutFileNames.Num(); i++)
{
TArray<uint8> RawFileData;
TArray<uint8> RawFileData2;
if (FFileHelper::LoadFileToArray(RawFileData, *OutFileNames[i]) && FFileHelper::LoadFileToArray(RawFileData2, *OutFileNames2[i]))
{
IImageWrapperPtr ImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::PNG);
IImageWrapperPtr ImageWrapper2 = ImageWrapperModule.CreateImageWrapper(EImageFormat::PNG);
if (ImageWrapper.IsValid() && ImageWrapper->SetCompressed(RawFileData.GetData(), RawFileData.Num())
&& ImageWrapper2.IsValid() && ImageWrapper2->SetCompressed(RawFileData2.GetData(), RawFileData2.Num()))
{
const TArray<uint8>* RawData = nullptr;
const TArray<uint8>* RawData2 = nullptr;
if (ImageWrapper->GetRaw(ERGBFormat::BGRA, ImageWrapper->GetBitDepth(), RawData)
&& ImageWrapper2->GetRaw(ERGBFormat::BGRA, ImageWrapper2->GetBitDepth(), RawData2))
{
uint32 ImageWidth = ImageWrapper->GetWidth();
uint32 ImageHeight = ImageWrapper->GetHeight();
uint32 ImageWidth2 = ImageWrapper2->GetWidth();
uint32 ImageHeight2 = ImageWrapper2->GetHeight();
if ((ImageWidth != ImageWidth2) || (ImageHeight != ImageHeight2))
{
FString DialogText = "Error! Image dimensions do not match for frame " + FString::FromInt(i);
FMessageDialog::Open(EAppMsgType::Ok, FText::FromString(DialogText));
return;
}
TArray<uint8> newdata;
newdata = *RawData;
for (int32 a = 0; a < RawData->Num() - 4; a = a + 4)
{
newdata[a + 1] = (*RawData2)[a];
}
//save
ImageWrapper->SetRaw(newdata.GetData(), newdata.GetAllocatedSize(), ImageWidth, ImageHeight, ERGBFormat::BGRA, 8);
const TArray<uint8>& PNGData = ImageWrapper->GetCompressed(100);
FFileHelper::SaveArrayToFile(PNGData, *OutFileNames[i]);
} //if imagewrapper.getraw
} //if imagewrapper.valid
} //if load file
}// for files loop
} //if files
}
static bool CompressSliceToASTC(
const void* SourceData,
int32 SizeX,
int32 SizeY,
FString CompressionParameters,
TArray<uint8>& OutCompressedData
)
{
// Always Y-invert the image prior to compression for proper orientation post-compression
uint8 LineBuffer[16384 * 4];
uint32 LineSize = SizeX * 4;
for (int32 LineIndex = 0; LineIndex < (SizeY / 2); LineIndex++)
{
uint8* LineData0 = ((uint8*)SourceData) + (LineSize * LineIndex);
uint8* LineData1 = ((uint8*)SourceData) + (LineSize * (SizeY - LineIndex - 1));
FMemory::Memcpy(LineBuffer, LineData0, LineSize);
FMemory::Memcpy(LineData0, LineData1, LineSize);
FMemory::Memcpy(LineData1, LineBuffer, LineSize);
}
// Compress and retrieve the PNG data to write out to disk
IImageWrapperPtr ImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::PNG);
ImageWrapper->SetRaw(SourceData, SizeX * SizeY * 4, SizeX, SizeY, ERGBFormat::RGBA, 8);
const TArray<uint8>& FileData = ImageWrapper->GetCompressed();
int32 FileDataSize = FileData.Num();
FGuid Guid;
FPlatformMisc::CreateGuid(Guid);
FString InputFilePath = FString::Printf(TEXT("Cache/%08x-%08x-%08x-%08x-RGBToASTCIn.png"), Guid.A, Guid.B, Guid.C, Guid.D);
FString OutputFilePath = FString::Printf(TEXT("Cache/%08x-%08x-%08x-%08x-RGBToASTCOut.astc"), Guid.A, Guid.B, Guid.C, Guid.D);
InputFilePath = FPaths::GameIntermediateDir() + InputFilePath;
OutputFilePath = FPaths::GameIntermediateDir() + OutputFilePath;
FArchive* PNGFile = NULL;
while (!PNGFile)
{
PNGFile = IFileManager::Get().CreateFileWriter(*InputFilePath); // Occasionally returns NULL due to error code ERROR_SHARING_VIOLATION
FPlatformProcess::Sleep(0.01f); // ... no choice but to wait for the file to become free to access
}
PNGFile->Serialize((void*)&FileData[0], FileDataSize);
delete PNGFile;
// Compress PNG file to ASTC (using the reference astcenc.exe from ARM)
FString Params = FString::Printf(TEXT("-c %s %s %s"),
*InputFilePath,
*OutputFilePath,
*CompressionParameters
);
UE_LOG(LogTextureFormatASTC, Display, TEXT("Compressing to ASTC (%s)..."), *CompressionParameters);
// Start Compressor
#if PLATFORM_MAC
FString CompressorPath(FPaths::EngineDir() + TEXT("Binaries/ThirdParty/ARM/Mac/astcenc"));
#elif PLATFORM_LINUX
FString CompressorPath(FPaths::EngineDir() + TEXT("Binaries/ThirdParty/ARM/Linux32/astcenc"));
#elif PLATFORM_WINDOWS
FString CompressorPath(FPaths::EngineDir() + TEXT("Binaries/ThirdParty/ARM/Win32/astcenc.exe"));
#else
#error Unsupported platform
#endif
FProcHandle Proc = FPlatformProcess::CreateProc(*CompressorPath, *Params, true, false, false, NULL, -1, NULL, NULL);
// Failed to start the compressor process
if (!Proc.IsValid())
{
UE_LOG(LogTextureFormatASTC, Error, TEXT("Failed to start astcenc for compressing images (%s)"), *CompressorPath);
return false;
}
// Wait for the process to complete
int ReturnCode;
while (!FPlatformProcess::GetProcReturnCode(Proc, &ReturnCode))
{
FPlatformProcess::Sleep(0.01f);
}
// Did it work?
bool bConversionWasSuccessful = (ReturnCode == 0);
// Open compressed file and put the data in OutCompressedImage
if (bConversionWasSuccessful)
{
// Get raw file data
TArray<uint8> ASTCData;
FFileHelper::LoadFileToArray(ASTCData, *OutputFilePath);
// Process it
FASTCHeader* Header = (FASTCHeader*)ASTCData.GetData();
// Fiddle with the texel count data to get the right value
uint32 TexelCountX =
(Header->TexelCountX[0] << 0) +
(Header->TexelCountX[1] << 8) +
(Header->TexelCountX[2] << 16);
uint32 TexelCountY =
(Header->TexelCountY[0] << 0) +
(Header->TexelCountY[1] << 8) +
(Header->TexelCountY[2] << 16);
uint32 TexelCountZ =
(Header->TexelCountZ[0] << 0) +
(Header->TexelCountZ[1] << 8) +
(Header->TexelCountZ[2] << 16);
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" Compressed Texture Header:"));
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" Magic: %x"), Header->Magic);
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" BlockSizeX: %u"), Header->BlockSizeX);
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" BlockSizeY: %u"), Header->BlockSizeY);
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" BlockSizeZ: %u"), Header->BlockSizeZ);
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" TexelCountX: %u"), TexelCountX);
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" TexelCountY: %u"), TexelCountY);
// UE_LOG(LogTextureFormatASTC, Display, TEXT(" TexelCountZ: %u"), TexelCountZ);
// Calculate size of this mip in blocks
uint32 MipSizeX = (TexelCountX + Header->BlockSizeX - 1) / Header->BlockSizeX;
uint32 MipSizeY = (TexelCountY + Header->BlockSizeY - 1) / Header->BlockSizeY;
// A block is always 16 bytes
uint32 MipSize = MipSizeX * MipSizeY * 16;
// Copy the compressed data
OutCompressedData.Empty(MipSize);
OutCompressedData.AddUninitialized(MipSize);
void* MipData = OutCompressedData.GetData();
// Calculate the offset to get to the mip data
check(sizeof(FASTCHeader) == 16);
check(ASTCData.Num() == (sizeof(FASTCHeader) + MipSize));
FMemory::Memcpy(MipData, ASTCData.GetData() + sizeof(FASTCHeader), MipSize);
}
else
{
UE_LOG(LogTextureFormatASTC, Error, TEXT("ASTC encoder failed with return code %d, mip size (%d, %d)"), ReturnCode, SizeX, SizeY);
IFileManager::Get().Delete(*InputFilePath);
IFileManager::Get().Delete(*OutputFilePath);
return false;
}
// Delete intermediate files
IFileManager::Get().Delete(*InputFilePath);
IFileManager::Get().Delete(*OutputFilePath);
return true;
}
void USceneCapturer::CaptureComponent( int32 CurrentHorizontalStep, int32 CurrentVerticalStep, FString Folder, USceneCaptureComponent2D* CaptureComponent, TArray<FColor>& Atlas )
{
TArray<FColor> SurfaceData;
{
SCOPE_CYCLE_COUNTER( STAT_SPReadStrip );
FTextureRenderTargetResource* RenderTarget = CaptureComponent->TextureTarget->GameThread_GetRenderTargetResource();
//TODO: ikrimae: Might need to validate that this divides evenly. Might not matter
int32 CenterX = CaptureWidth / 2;
int32 CenterY = CaptureHeight / 2;
SurfaceData.AddUninitialized( StripWidth * StripHeight );
// Read pixels
FIntRect Area( CenterX - ( StripWidth / 2 ), CenterY - ( StripHeight / 2 ), CenterX + ( StripWidth / 2 ), CenterY + ( StripHeight / 2) );
auto readSurfaceDataFlags = FReadSurfaceDataFlags();
readSurfaceDataFlags.SetLinearToGamma(false);
RenderTarget->ReadPixelsPtr( SurfaceData.GetData(), readSurfaceDataFlags, Area );
}
// Copy off strip to atlas texture
CopyToUnprojAtlas( CurrentHorizontalStep, CurrentVerticalStep, Atlas, SurfaceData );
if( FStereoPanoramaManager::GenerateDebugImages->GetInt() != 0 )
{
SCOPE_CYCLE_COUNTER( STAT_SPSavePNG );
// Generate name
FString TickString = FString::Printf( TEXT( "_%05d_%04d_%04d" ), CurrentFrameCount, CurrentHorizontalStep, CurrentVerticalStep );
FString CaptureName = OutputDir / Timestamp / Folder / TickString + TEXT( ".png" );
UE_LOG( LogStereoPanorama, Log, TEXT( "Writing snapshot: %s" ), *CaptureName );
// Write out PNG
if (FStereoPanoramaManager::GenerateDebugImages->GetInt() == 2)
{
//Read Whole Capture Buffer
IImageWrapperPtr ImageWrapper = ImageWrapperModule.CreateImageWrapper( EImageFormat::PNG );
TArray<FColor> SurfaceDataWhole;
SurfaceDataWhole.AddUninitialized(CaptureWidth * CaptureHeight);
// Read pixels
FTextureRenderTargetResource* RenderTarget = CaptureComponent->TextureTarget->GameThread_GetRenderTargetResource();
RenderTarget->ReadPixelsPtr(SurfaceDataWhole.GetData(), FReadSurfaceDataFlags());
// Force alpha value
if (bForceAlpha)
{
for (FColor& Color : SurfaceDataWhole)
{
Color.A = 255;
}
}
ImageWrapper->SetRaw(SurfaceDataWhole.GetData(), SurfaceDataWhole.GetAllocatedSize(), CaptureWidth, CaptureHeight, ERGBFormat::BGRA, 8);
const TArray<uint8>& PNGData = ImageWrapper->GetCompressed(100);
FFileHelper::SaveArrayToFile(PNGData, *CaptureName);
ImageWrapper.Reset();
}
else
{
if (bForceAlpha)
{
for (FColor& Color : SurfaceData)
{
Color.A = 255;
}
}
IImageWrapperPtr ImageWrapper = ImageWrapperModule.CreateImageWrapper(EImageFormat::PNG);
ImageWrapper->SetRaw(SurfaceData.GetData(), SurfaceData.GetAllocatedSize(), StripWidth, StripHeight, ERGBFormat::BGRA, 8);
const TArray<uint8>& PNGData = ImageWrapper->GetCompressed(100);
FFileHelper::SaveArrayToFile( PNGData, *CaptureName );
ImageWrapper.Reset();
}
}
}
TArray<FColor> USceneCapturer::SaveAtlas(FString Folder, const TArray<FColor>& SurfaceData)
{
SCOPE_CYCLE_COUNTER( STAT_SPSavePNG );
TArray<FColor> SphericalAtlas;
SphericalAtlas.AddZeroed(SphericalAtlasWidth * SphericalAtlasHeight);
const FVector2D slicePlaneDim = FVector2D(
2.0f * FMath::Tan(FMath::DegreesToRadians(sliceHFov) / 2.0f),
2.0f * FMath::Tan(FMath::DegreesToRadians(sliceVFov) / 2.0f));
//For each direction,
// Find corresponding slice
// Calculate intersection of slice plane
// Calculate intersection UVs by projecting onto plane tangents
// Supersample that UV coordinate from the unprojected atlas
{
SCOPE_CYCLE_COUNTER(STAT_SPSampleSpherical);
// Dump out how long the process took
const FDateTime SamplingStartTime = FDateTime::UtcNow();
UE_LOG(LogStereoPanorama, Log, TEXT("Sampling atlas..."));
for (int32 y = 0; y < SphericalAtlasHeight; y++)
{
for (int32 x = 0; x < SphericalAtlasWidth; x++)
{
FLinearColor samplePixelAccum = FLinearColor(0, 0, 0, 0);
//TODO: ikrimae: Seems that bilinear filtering sans supersampling is good enough. Supersampling sans bilerp seems best.
// After more tests, come back to optimize by folding supersampling in and remove this outer sampling loop.
const auto& ssPattern = g_ssPatterns[SSMethod];
for (int32 SampleCount = 0; SampleCount < ssPattern.numSamples; SampleCount++)
{
const float sampleU = ((float)x + ssPattern.ssOffsets[SampleCount].X) / SphericalAtlasWidth;
const float sampleV = ((float)y + ssPattern.ssOffsets[SampleCount].Y) / SphericalAtlasHeight;
const float sampleTheta = sampleU * 360.0f;
const float samplePhi = sampleV * 180.0f;
const FVector sampleDir = FVector(
FMath::Sin(FMath::DegreesToRadians(samplePhi)) * FMath::Cos(FMath::DegreesToRadians(sampleTheta)),
FMath::Sin(FMath::DegreesToRadians(samplePhi)) * FMath::Sin(FMath::DegreesToRadians(sampleTheta)),
FMath::Cos(FMath::DegreesToRadians(samplePhi)));
//TODO: ikrimae: ugh, ugly.
const int32 sliceXIndex = FMath::TruncToInt(FRotator::ClampAxis(sampleTheta + hAngIncrement / 2.0f) / hAngIncrement);
int32 sliceYIndex = 0;
//Slice Selection = slice with max{sampleDir dot sliceNormal }
{
float largestCosAngle = 0;
for (int VerticalStep = 0; VerticalStep < NumberOfVerticalSteps; VerticalStep++)
{
const FVector2D sliceCenterThetaPhi = FVector2D(
hAngIncrement * sliceXIndex,
vAngIncrement * VerticalStep);
//TODO: ikrimae: There has got to be a faster way. Rethink reparametrization later
const FVector sliceDir = FVector(
FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)));
const float cosAngle = sampleDir | sliceDir;
if (cosAngle > largestCosAngle)
{
largestCosAngle = cosAngle;
sliceYIndex = VerticalStep;
}
}
}
const FVector2D sliceCenterThetaPhi = FVector2D(
hAngIncrement * sliceXIndex,
vAngIncrement * sliceYIndex);
//TODO: ikrimae: Reparameterize with an inverse mapping (e.g. project from slice pixels onto final u,v coordinates.
// Should make code simpler and faster b/c reduces to handful of sin/cos calcs per slice.
// Supersampling will be more difficult though.
const FVector sliceDir = FVector(
FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)));
const FPlane slicePlane = FPlane(sliceDir, -sliceDir);
//Tangents from partial derivatives of sphere equation
const FVector slicePlanePhiTangent = FVector(
FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
-FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.Y))).GetSafeNormal();
//Should be reconstructed to get around discontinuity of theta tangent at nodal points
const FVector slicePlaneThetaTangent = (sliceDir ^ slicePlanePhiTangent).GetSafeNormal();
//const FVector slicePlaneThetaTangent = FVector(
// -FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
// FMath::Sin(FMath::DegreesToRadians(sliceCenterThetaPhi.Y)) * FMath::Cos(FMath::DegreesToRadians(sliceCenterThetaPhi.X)),
// 0).SafeNormal();
check(!slicePlaneThetaTangent.IsZero() && !slicePlanePhiTangent.IsZero());
const double t = (double)-slicePlane.W / (sampleDir | sliceDir);
const FVector sliceIntersection = FVector(t * sampleDir.X, t * sampleDir.Y, t * sampleDir.Z);
//Calculate scalar projection of sliceIntersection onto tangent vectors. a dot b / |b| = a dot b when tangent vectors are normalized
//Then reparameterize to U,V of the sliceplane based on slice plane dimensions
const float sliceU = (sliceIntersection | slicePlaneThetaTangent) / slicePlaneDim.X;
const float sliceV = (sliceIntersection | slicePlanePhiTangent) / slicePlaneDim.Y;
check(sliceU >= -(0.5f + KINDA_SMALL_NUMBER) &&
sliceU <= (0.5f + KINDA_SMALL_NUMBER));
check(sliceV >= -(0.5f + KINDA_SMALL_NUMBER) &&
sliceV <= (0.5f + KINDA_SMALL_NUMBER));
//TODO: ikrimae: Supersample/bilinear filter
const int32 slicePixelX = FMath::TruncToInt(dbgMatchCaptureSliceFovToAtlasSliceFov ? sliceU * StripWidth : sliceU * CaptureWidth);
const int32 slicePixelY = FMath::TruncToInt(dbgMatchCaptureSliceFovToAtlasSliceFov ? sliceV * StripHeight : sliceV * CaptureHeight);
FLinearColor slicePixelSample;
if (bEnableBilerp)
{
//TODO: ikrimae: Clean up later; too tired now
const int32 sliceCenterPixelX = (sliceXIndex + 0.5f) * StripWidth;
const int32 sliceCenterPixelY = (sliceYIndex + 0.5f) * StripHeight;
const FIntPoint atlasSampleTL(sliceCenterPixelX + FMath::Clamp(slicePixelX , -StripWidth/2, StripWidth/2), sliceCenterPixelY + FMath::Clamp(slicePixelY , -StripHeight/2, StripHeight/2));
const FIntPoint atlasSampleTR(sliceCenterPixelX + FMath::Clamp(slicePixelX + 1, -StripWidth/2, StripWidth/2), sliceCenterPixelY + FMath::Clamp(slicePixelY , -StripHeight/2, StripHeight/2));
const FIntPoint atlasSampleBL(sliceCenterPixelX + FMath::Clamp(slicePixelX , -StripWidth/2, StripWidth/2), sliceCenterPixelY + FMath::Clamp(slicePixelY + 1, -StripHeight/2, StripHeight/2));
const FIntPoint atlasSampleBR(sliceCenterPixelX + FMath::Clamp(slicePixelX + 1, -StripWidth/2, StripWidth/2), sliceCenterPixelY + FMath::Clamp(slicePixelY + 1, -StripHeight/2, StripHeight/2));
const FColor pixelColorTL = SurfaceData[atlasSampleTL.Y * UnprojectedAtlasWidth + atlasSampleTL.X];
const FColor pixelColorTR = SurfaceData[atlasSampleTR.Y * UnprojectedAtlasWidth + atlasSampleTR.X];
const FColor pixelColorBL = SurfaceData[atlasSampleBL.Y * UnprojectedAtlasWidth + atlasSampleBL.X];
const FColor pixelColorBR = SurfaceData[atlasSampleBR.Y * UnprojectedAtlasWidth + atlasSampleBR.X];
const float fracX = FMath::Frac(dbgMatchCaptureSliceFovToAtlasSliceFov ? sliceU * StripWidth : sliceU * CaptureWidth);
const float fracY = FMath::Frac(dbgMatchCaptureSliceFovToAtlasSliceFov ? sliceV * StripHeight : sliceV * CaptureHeight);
//Reinterpret as linear (a.k.a dont apply srgb inversion)
slicePixelSample = FMath::BiLerp(
pixelColorTL.ReinterpretAsLinear(), pixelColorTR.ReinterpretAsLinear(),
pixelColorBL.ReinterpretAsLinear(), pixelColorBR.ReinterpretAsLinear(),
fracX, fracY);
}
else
{
const int32 sliceCenterPixelX = (sliceXIndex + 0.5f) * StripWidth;
const int32 sliceCenterPixelY = (sliceYIndex + 0.5f) * StripHeight;
const int32 atlasSampleX = sliceCenterPixelX + slicePixelX;
const int32 atlasSampleY = sliceCenterPixelY + slicePixelY;
slicePixelSample = SurfaceData[atlasSampleY * UnprojectedAtlasWidth + atlasSampleX].ReinterpretAsLinear();
}
samplePixelAccum += slicePixelSample;
////Output color map of projections
//const FColor debugEquiColors[12] = {
// FColor(205, 180, 76),
// FColor(190, 88, 202),
// FColor(127, 185, 194),
// FColor(90, 54, 47),
// FColor(197, 88, 53),
// FColor(197, 75, 124),
// FColor(130, 208, 72),
// FColor(136, 211, 153),
// FColor(126, 130, 207),
// FColor(83, 107, 59),
// FColor(200, 160, 157),
// FColor(80, 66, 106)
//};
//samplePixelAccum = ssPattern.numSamples * debugEquiColors[sliceYIndex * 4 + sliceXIndex];
}
SphericalAtlas[y * SphericalAtlasWidth + x] = (samplePixelAccum / ssPattern.numSamples).Quantize();
// Force alpha value
if (bForceAlpha)
{
SphericalAtlas[y * SphericalAtlasWidth + x].A = 255;
}
}
}
//Blit the first column into the last column to make the stereo image seamless at theta=360
for (int32 y = 0; y < SphericalAtlasHeight; y++)
{
SphericalAtlas[y * SphericalAtlasWidth + (SphericalAtlasWidth - 1)] = SphericalAtlas[y * SphericalAtlasWidth + 0];
}
const FTimespan SamplingDuration = FDateTime::UtcNow() - SamplingStartTime;
UE_LOG(LogStereoPanorama, Log, TEXT("...done! Duration: %g seconds"), SamplingDuration.GetTotalSeconds());
}
// Generate name
FString FrameString = FString::Printf( TEXT( "%s_%05d.png" ), *Folder, CurrentFrameCount );
FString AtlasName = OutputDir / Timestamp / FrameString;
UE_LOG( LogStereoPanorama, Log, TEXT( "Writing atlas: %s" ), *AtlasName );
// Write out PNG
//TODO: ikrimae: Use threads to write out the images for performance
IImageWrapperPtr ImageWrapper = ImageWrapperModule.CreateImageWrapper( EImageFormat::PNG );
ImageWrapper->SetRaw(SphericalAtlas.GetData(), SphericalAtlas.GetAllocatedSize(), SphericalAtlasWidth, SphericalAtlasHeight, ERGBFormat::BGRA, 8);
const TArray<uint8>& PNGData = ImageWrapper->GetCompressed(100);
FFileHelper::SaveArrayToFile( PNGData, *AtlasName );
if (FStereoPanoramaManager::GenerateDebugImages->GetInt() != 0)
{
FString FrameStringUnprojected = FString::Printf(TEXT("%s_%05d_Unprojected.png"), *Folder, CurrentFrameCount);
FString AtlasNameUnprojected = OutputDir / Timestamp / FrameStringUnprojected;
ImageWrapper->SetRaw(SurfaceData.GetData(), SurfaceData.GetAllocatedSize(), UnprojectedAtlasWidth, UnprojectedAtlasHeight, ERGBFormat::BGRA, 8);
const TArray<uint8>& PNGDataUnprojected = ImageWrapper->GetCompressed(100);
FFileHelper::SaveArrayToFile(PNGData, *AtlasNameUnprojected);
}
ImageWrapper.Reset();
UE_LOG( LogStereoPanorama, Log, TEXT( " ... done!" ), *AtlasName );
return SphericalAtlas;
}