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3aece47882
Please note that file comments had no purpose in nearly all cases and just added visual clutter. The two files that had meaningful file comments had their comments moved into the corresponding classes. There are still hundreds of file comments left in other files that will be removed over time. Also cleaned up some random stuff along the way: - relative paths to public headers within the same module are no longer necessary (automatically discovered by UBT now) - header guards are deprecated, use #pragma once instead (all compilers support it now) - space between multiple template brackets is no longer required (all compilers support >> now) - NULL to nullptr, OVERRIDE to override - spelling errors, whitespace, line breaks [CL 2104067 by Max Preussner in Main branch]
164 lines
3.9 KiB
C++
164 lines
3.9 KiB
C++
// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.
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#include "ImageWrapperPrivatePCH.h"
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#if WITH_UNREALJPEG
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#ifdef __clang__
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wshadow"
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#endif
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#include "jpgd.h"
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#include "jpgd.cpp"
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#include "jpge.h"
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#include "jpge.cpp"
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#ifdef __clang__
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#pragma clang diagnostic pop
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#endif
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DEFINE_LOG_CATEGORY_STATIC(JPEGLog, Log, All);
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// Only allow one thread to use JPEG decoder at a time (it's not thread safe)
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FCriticalSection GJPEGSection;
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/* FJpegImageWrapper structors
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*****************************************************************************/
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FJpegImageWrapper::FJpegImageWrapper( )
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: FImageWrapperBase()
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{ }
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/* FImageWrapperBase interface
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*****************************************************************************/
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bool FJpegImageWrapper::SetCompressed( const void* InCompressedData, int32 InCompressedSize )
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{
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jpgd::jpeg_decoder_mem_stream jpeg_memStream( (uint8*)InCompressedData, InCompressedSize );
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jpgd::jpeg_decoder decoder(&jpeg_memStream);
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if ( decoder.get_error_code() != jpgd::JPGD_SUCCESS )
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return false;
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bool bResult = FImageWrapperBase::SetCompressed( InCompressedData, InCompressedSize );
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// We don't support 16 bit jpegs
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BitDepth = 8;
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Width = decoder.get_width();
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Height = decoder.get_height();
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switch ( decoder.get_num_components() )
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{
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case 1:
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Format = ERGBFormat::Gray;
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break;
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case 3:
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Format = ERGBFormat::RGBA;
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break;
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default:
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return false;
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}
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return bResult;
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}
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bool FJpegImageWrapper::SetRaw( const void* InRawData, int32 InRawSize, const int32 InWidth, const int32 InHeight, const ERGBFormat::Type InFormat, const int32 InBitDepth )
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{
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check((InFormat == ERGBFormat::RGBA || InFormat == ERGBFormat::BGRA) && InBitDepth == 8);
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bool bResult = FImageWrapperBase::SetRaw( InRawData, InRawSize, InWidth, InHeight, InFormat, InBitDepth );
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return bResult;
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}
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void FJpegImageWrapper::Compress( int32 Quality )
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{
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if (CompressedData.Num() == 0)
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{
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FScopeLock JPEGLock(&GJPEGSection);
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if (Quality == 0) {Quality = 85;}
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ensure(Quality >= 1 && Quality <= 100);
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Quality = FMath::Clamp(Quality, 1, 100);
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check( RawData.Num() );
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check( Width > 0 );
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check( Height > 0 );
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// re-order components if required - JPEGs expect RGBA
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if(RawFormat == ERGBFormat::BGRA)
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{
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FColor* Colors = (FColor*)RawData.GetData();
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const int32 NumColors = RawData.Num() / 4;
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for(int32 ColorIndex = 0; ColorIndex < NumColors; ColorIndex++)
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{
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uint8 Temp = Colors[ColorIndex].B;
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Colors[ColorIndex].B = Colors[ColorIndex].R;
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Colors[ColorIndex].R = Temp;
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}
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}
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CompressedData.Empty();
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CompressedData.AddUninitialized(RawData.Num());
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int OutBufferSize = CompressedData.Num();
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jpge::params Parameters;
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Parameters.m_quality = Quality;
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bool bSuccess = jpge::compress_image_to_jpeg_file_in_memory(
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CompressedData.GetTypedData(), OutBufferSize, Width, Height, 4, RawData.GetTypedData(), Parameters);
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check(bSuccess);
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CompressedData.RemoveAt(OutBufferSize, CompressedData.Num() - OutBufferSize);
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}
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}
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void FJpegImageWrapper::Uncompress( const ERGBFormat::Type InFormat, int32 InBitDepth )
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{
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// Ensure we haven't already uncompressed the file.
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if ( RawData.Num() != 0 )
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{
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return;
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}
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// Get the number of channels we need to extract
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int Channels = 0;
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if ( ( InFormat == ERGBFormat::RGBA || InFormat == ERGBFormat::BGRA ) && InBitDepth == 8 )
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{
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Channels = 4;
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}
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else if ( InFormat == ERGBFormat::Gray && InBitDepth == 8 )
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{
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Channels = 1;
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}
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else
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{
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check( false );
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}
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FScopeLock JPEGLock( &GJPEGSection );
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check( CompressedData.Num() );
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int32 NumColors;
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uint8* OutData = jpgd::decompress_jpeg_image_from_memory(
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CompressedData.GetTypedData(), CompressedData.Num(), &Width, &Height, &NumColors, Channels );
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RawData.Empty();
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RawData.AddUninitialized( Width * Height * Channels );
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FMemory::Memcpy( RawData.GetTypedData(), OutData, RawData.Num() );
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}
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#endif //WITH_JPEG
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