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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Image Byte Swapping. Isolate routines to own module to allow librarian
// to ignore xbox 360 dependenices in non-applicable win32 projects.
//
//=============================================================================//
#if defined( _WIN32 ) && !defined( _X360 ) && !defined( DX_TO_GL_ABSTRACTION )
#include <windows.h>
#endif
#include "tier0/platform.h"
#include "tier0/dbg.h"
#include "bitmap/imageformat.h"
// Should be last include
#include "tier0/memdbgon.h"
#if defined( _WIN32 ) && !defined( _X360 ) && !defined( NO_X360_XDK ) && !defined( DX_TO_GL_ABSTRACTION )
// the x86 version of the 360 (used by win32 tools)
// It would have been nice to use the 360 D3DFORMAT bit encodings, but the codes
// are different for WIN32, and this routine is used by a WIN32 library to
// manipulate 360 data, so there can be no reliance on WIN32 D3DFORMAT bits
#pragma warning(push)
#pragma warning(disable : 4458) // warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc (disabled due to std headers having exception syntax)
#include "..\x360xdk\include\win32\vs2005\d3d9.h"
#include "..\x360xdk\include\win32\vs2005\XGraphics.h"
#pragma warning(pop)
#endif
namespace ImageLoader
{
//-----------------------------------------------------------------------------
// Known formats that can be converted. Used as a trap for 360 formats
// that may occur but have not been validated yet.
//-----------------------------------------------------------------------------
bool IsFormatValidForConversion( ImageFormat fmt )
{
switch ( fmt )
{
case IMAGE_FORMAT_RGBA8888:
case IMAGE_FORMAT_ABGR8888:
case IMAGE_FORMAT_RGB888:
case IMAGE_FORMAT_BGR888:
case IMAGE_FORMAT_ARGB8888:
case IMAGE_FORMAT_BGRA8888:
case IMAGE_FORMAT_BGRX8888:
case IMAGE_FORMAT_UVWQ8888:
case IMAGE_FORMAT_RGBA16161616F:
case IMAGE_FORMAT_RGBA16161616:
case IMAGE_FORMAT_UVLX8888:
case IMAGE_FORMAT_DXT1:
case IMAGE_FORMAT_DXT1_ONEBITALPHA:
case IMAGE_FORMAT_DXT3:
case IMAGE_FORMAT_DXT5:
case IMAGE_FORMAT_UV88:
return true;
// untested formats
default:
case IMAGE_FORMAT_RGB565:
case IMAGE_FORMAT_I8:
case IMAGE_FORMAT_IA88:
case IMAGE_FORMAT_A8:
case IMAGE_FORMAT_RGB888_BLUESCREEN:
case IMAGE_FORMAT_BGR888_BLUESCREEN:
case IMAGE_FORMAT_BGR565:
case IMAGE_FORMAT_BGRX5551:
case IMAGE_FORMAT_BGRA4444:
case IMAGE_FORMAT_BGRA5551:
case IMAGE_FORMAT_ATI1N:
case IMAGE_FORMAT_ATI2N:
break;
}
return false;
}
//-----------------------------------------------------------------------------
// Swaps the image element type within the format.
// This is to ensure that >8 bit channels are in the correct endian format
// as expected by the conversion process, which varies according to format,
// input, and output.
//-----------------------------------------------------------------------------
void PreConvertSwapImageData( unsigned char *pImageData, int nImageSize, ImageFormat imageFormat, int width, int stride )
{
Assert( IsFormatValidForConversion( imageFormat ) );
#if !defined( DX_TO_GL_ABSTRACTION ) && !defined( NO_X360_XDK )
if ( IsPC() )
{
// running as a win32 tool, data is in expected order
// for conversion code
return;
}
// running on 360 and converting, input data must be x86 order
// swap to ensure conversion code gets valid data
XGENDIANTYPE xEndian;
switch ( imageFormat )
{
default:
return;
case IMAGE_FORMAT_RGBA16161616F:
case IMAGE_FORMAT_RGBA16161616:
xEndian = XGENDIAN_8IN16;
break;
}
int count;
if ( !stride )
{
stride = XGENDIANTYPE_GET_DATA_SIZE( xEndian );
count = nImageSize / stride;
XGEndianSwapMemory( pImageData, pImageData, xEndian, stride, count );
}
else
{
int nRows = nImageSize/stride;
for ( int i=0; i<nRows; i++ )
{
XGEndianSwapMemory( pImageData, pImageData, xEndian, XGENDIANTYPE_GET_DATA_SIZE( xEndian ), width );
pImageData += stride;
}
}
#endif
}
//-----------------------------------------------------------------------------
// Swaps image bytes for use on a big endian platform. This is used after the conversion
// process to match the 360 d3dformats.
//-----------------------------------------------------------------------------
void PostConvertSwapImageData( unsigned char *pImageData, int nImageSize, ImageFormat imageFormat, int width, int stride )
{
Assert( IsFormatValidForConversion( imageFormat ) );
#if !defined( DX_TO_GL_ABSTRACTION ) && !defined( NO_X360_XDK )
// It would have been nice to use the 360 D3DFORMAT bit encodings, but the codes
// are different for win32, and this routine is used by a win32 library to
// manipulate 360 data, so there can be no reliance on D3DFORMAT bits
XGENDIANTYPE xEndian;
switch ( imageFormat )
{
default:
return;
case IMAGE_FORMAT_RGBA16161616:
if ( IsX360() )
{
// running on 360 the conversion output is correct
return;
}
// running on the pc, the output needs to be in 360 order
xEndian = XGENDIAN_8IN16;
break;
case IMAGE_FORMAT_DXT1:
case IMAGE_FORMAT_DXT1_ONEBITALPHA:
case IMAGE_FORMAT_DXT3:
case IMAGE_FORMAT_DXT5:
case IMAGE_FORMAT_UV88:
case IMAGE_FORMAT_ATI1N:
case IMAGE_FORMAT_ATI2N:
xEndian = XGENDIAN_8IN16;
break;
case IMAGE_FORMAT_BGRA8888:
case IMAGE_FORMAT_BGRX8888:
case IMAGE_FORMAT_UVWQ8888:
case IMAGE_FORMAT_UVLX8888:
xEndian = XGENDIAN_8IN32;
break;
}
int count;
if ( !stride )
{
stride = XGENDIANTYPE_GET_DATA_SIZE( xEndian );
count = nImageSize / stride;
XGEndianSwapMemory( pImageData, pImageData, xEndian, stride, count );
}
else
{
int nRows = nImageSize/stride;
for ( int i=0; i<nRows; i++ )
{
XGEndianSwapMemory( pImageData, pImageData, xEndian, XGENDIANTYPE_GET_DATA_SIZE( xEndian ), width );
pImageData += stride;
}
}
#endif
}
//-----------------------------------------------------------------------------
// Swaps image bytes.
//-----------------------------------------------------------------------------
void ByteSwapImageData( unsigned char *pImageData, int nImageSize, ImageFormat imageFormat, int width, int stride )
{
Assert( IsFormatValidForConversion( imageFormat ) );
#if !defined( DX_TO_GL_ABSTRACTION ) && !defined( NO_X360_XDK )
XGENDIANTYPE xEndian;
switch ( imageFormat )
{
case IMAGE_FORMAT_BGR888:
case IMAGE_FORMAT_I8:
case IMAGE_FORMAT_A8:
default:
return;
case IMAGE_FORMAT_BGRA8888:
case IMAGE_FORMAT_BGRX8888:
case IMAGE_FORMAT_UVWQ8888:
case IMAGE_FORMAT_UVLX8888:
case IMAGE_FORMAT_R32F:
case IMAGE_FORMAT_RGBA32323232F:
xEndian = XGENDIAN_8IN32;
break;
case IMAGE_FORMAT_BGR565:
case IMAGE_FORMAT_BGRX5551:
case IMAGE_FORMAT_BGRA5551:
case IMAGE_FORMAT_BGRA4444:
case IMAGE_FORMAT_IA88:
case IMAGE_FORMAT_DXT1:
case IMAGE_FORMAT_DXT1_ONEBITALPHA:
case IMAGE_FORMAT_DXT3:
case IMAGE_FORMAT_DXT5:
case IMAGE_FORMAT_ATI1N:
case IMAGE_FORMAT_ATI2N:
case IMAGE_FORMAT_UV88:
case IMAGE_FORMAT_RGBA16161616F:
case IMAGE_FORMAT_RGBA16161616:
xEndian = XGENDIAN_8IN16;
break;
}
int count;
if ( !stride )
{
stride = XGENDIANTYPE_GET_DATA_SIZE( xEndian );
count = nImageSize / stride;
XGEndianSwapMemory( pImageData, pImageData, xEndian, stride, count );
}
else
{
int nRows = nImageSize/stride;
for ( int i=0; i<nRows; i++ )
{
XGEndianSwapMemory( pImageData, pImageData, xEndian, XGENDIANTYPE_GET_DATA_SIZE( xEndian ), width );
pImageData += stride;
}
}
#endif
}
}
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