void TestGraph( TEST_GRAPH_TYPE _type )
{
ColorProfile sRGB = new ColorProfile( ColorProfile.STANDARD_PROFILE.sRGB );
m_imageFile.Init( 1024, 768, ImageFile.PIXEL_FORMAT.RGBA8, sRGB );
m_imageFile.Clear( new float4( 1, 1, 1, 1 ) );
// m_imageFile.Clear( new float4( 0, 0, 0, 1 ) );
if ( _type == TEST_GRAPH_TYPE.SIMPLE_FUNCTION ) {
// Unit test simple graph
float2 rangeY = new float2( -1.0f, 1.0f );
// m_imageFile.PlotGraph( black, new float2( -30.0f, 30.0f ), rangeY, ( float x ) => { return (float) Math.Sin( x ) / x; } );
m_imageFile.PlotGraphAutoRangeY( black, new float2( -30.0f, 30.0f ), ref rangeY, ( float x ) => { return (float) Math.Sin( x ) / x; } );
m_imageFile.PlotAxes( black, new float2( -30.0f, 30.0f ), rangeY, (float) (0.5 * Math.PI), 0.1f );
} else if ( _type == TEST_GRAPH_TYPE.SIMPLE_LOG_FUNCTIONS ) {
m_imageFile.PlotLogGraph( red, new float2( 0.0f, 2.0f ), new float2( 0.0f, 100.0f ), ( float x ) => { return (float) Math.Pow( 10.0, x ); }, 1.0f, 1.0f );
// m_imageFile.PlotLogGraph( green, new float2( -2.0f, 2.0f ), new float2( 0.0f, 100.0f ), ( float x ) => { return (float) Math.Pow( 10.0, x ); }, 10.0f, 1.0f );
m_imageFile.PlotLogGraph( green, new float2( 0.0f, 2.0f ), new float2( 0.0f, 2.0f ), ( float x ) => { return (float) Math.Pow( 10.0, x ); }, 1.0f, 10.0f );
m_imageFile.PlotLogGraph( blue, new float2( -2.0f, 2.0f ), new float2( -2.0f, 2.0f ), ( float x ) => { return (float) Math.Pow( 10.0, x ); }, 10.0f, 10.0f );
// m_imageFile.PlotLogAxes( black, new float2( -1000.0f, 1000.0f ), new float2( -100.0f, 100.0f ), -100.0f, -10.0f );
// m_imageFile.PlotLogAxes( black, new float2( -100.0f, 1000.0f ), new float2( -2.0f, 2.0f ), -10.0f, 10.0f );
m_imageFile.PlotLogAxes( black, new float2( -2.0f, 2.0f ), new float2( -2.0f, 2.0f ), 10.0f, 2.0f );
} else if ( _type == TEST_GRAPH_TYPE.MANY_LINES ) {
// Unit test a LOT of clipped lines!
int W = (int) m_imageFile.Width;
int H = (int) m_imageFile.Height;
Random R = new Random( 1 );
float2 P0 = new float2();
float2 P1 = new float2();
for ( int i=0; i < 10000; i++ ) {
P0.x = (float) (R.NextDouble() * 3*W) - W;
P0.y = (float) (R.NextDouble() * 3*H) - H;
P1.x = (float) (R.NextDouble() * 3*W) - W;
P1.y = (float) (R.NextDouble() * 3*H) - H;
m_imageFile.DrawLine( black, P0, P1 );
// m_imageFile.DrawLine( R.NextDouble() > 0.5 ? white : black, P0, P1 );
}
}
panelDrawing.Bitmap = m_imageFile.AsBitmap;
}
void TestBlackBodyRadiation( TEST_COLOR_PROFILES _type )
{
ColorProfile sRGB = new ColorProfile( ColorProfile.STANDARD_PROFILE.sRGB );
switch ( _type ) {
// Load the color gamut and try and plot the locii of various white points
//
case TEST_COLOR_PROFILES.DRAW_WHITE_POINT_LOCI: {
m_imageFile.Load( new System.IO.FileInfo( @"..\..\Images\In\xyGamut.png" ) );
float2 cornerZero = new float2( 114, 1336 ); // xy=(0.0, 0.0)
float2 cornerPoint8Point9 = new float2( 1257, 49 ); // xy=(0.8, 0.9)
// Check XYZ<->RGB and XYZ<->xyY converter code
// float3 xyY = new float3();
// float3 XYZ = new float3();
//
// float4 testRGB = new float4();
// float4 testXYZ = new float4();
// for ( int i=1; i <= 10; i++ ) {
// float f = i / 10.0f;
// testRGB.Set( 1*f, 1*f, 1*f, 1.0f );
// sRGB.RGB2XYZ( testRGB, ref testXYZ );
//
// XYZ.Set( testXYZ.x, testXYZ.y, testXYZ.z );
// ColorProfile.XYZ2xyY( XYZ, ref xyY );
// ColorProfile.xyY2XYZ( xyY, ref XYZ );
// testXYZ.Set( XYZ, 1.0f );
//
// sRGB.XYZ2RGB( testXYZ, ref testRGB );
// }
float2 xy = new float2();
float4 color = new float4( 1, 0, 0, 1 );
float4 color2 = new float4( 0, 0.5f, 1, 1 );
for ( int locusIndex=0; locusIndex < 20; locusIndex++ ) {
// float T = 1500.0f + (8000.0f - 1500.0f) * locusIndex / 20.0f;
float T = 1500.0f + 500.0f * locusIndex;
ColorProfile.ComputeWhitePointChromaticities( T, ref xy );
// Plot with the color of the white point
// ColorProfile.xyY2XYZ( new float3( xy, 1.0f ), ref XYZ );
// sRGB.XYZ2RGB( new float4( XYZ, 1.0f ), ref color );
float2 fPos = cornerZero + (cornerPoint8Point9 - cornerZero) * new float2( xy.x / 0.8f, xy.y / 0.9f );
DrawPoint( (int) fPos.x, (int) fPos.y, 6, ref color );
ColorProfile.ComputeWhitePointChromaticitiesAnalytical( T, ref xy );
fPos = cornerZero + (cornerPoint8Point9 - cornerZero) * new float2( xy.x / 0.8f, xy.y / 0.9f );
DrawPoint( (int) fPos.x, (int) fPos.y, 3, ref color2 );
}
}
break;
case TEST_COLOR_PROFILES.BUILD_WHITE_POINTS_GRADIENT_NO_BALANCE:
case TEST_COLOR_PROFILES.BUILD_WHITE_POINTS_GRADIENT_BALANCE_D50_TO_D65:
case TEST_COLOR_PROFILES.BUILD_WHITE_POINTS_GRADIENT_BALANCE_D65_TO_D50: {
float3x3 whiteBalancingXYZ = float3x3.Identity;
float whitePointCCT = 6500.0f;
if ( _type == TEST_COLOR_PROFILES.BUILD_WHITE_POINTS_GRADIENT_BALANCE_D50_TO_D65 ) {
// Compute white balancing from a D50 to a D65 illuminant
whiteBalancingXYZ = ColorProfile.ComputeWhiteBalanceXYZMatrix( ColorProfile.Chromaticities.AdobeRGB_D50, ColorProfile.ILLUMINANT_D65 );
whitePointCCT = 5000.0f;
} else if ( _type == TEST_COLOR_PROFILES.BUILD_WHITE_POINTS_GRADIENT_BALANCE_D65_TO_D50 ) {
// Compute white balancing from a D65 to a D50 illuminant
whiteBalancingXYZ = ColorProfile.ComputeWhiteBalanceXYZMatrix( ColorProfile.Chromaticities.sRGB, ColorProfile.ILLUMINANT_D50 );
whitePointCCT = 10000.0f; // ?? Actually we're already in D65 so assuming we're starting from a D50 illuminant instead actually pushes the white point far away...
}
// Build a gradient of white points from 1500K to 8000K
m_imageFile.Init( 650, 32, ImageFile.PIXEL_FORMAT.RGBA8, sRGB );
float4 RGB = new float4( 0, 0, 0, 0 );
float3 XYZ = new float3( 0, 0, 0 );
float2 xy = new float2();
for ( uint X=0; X < 650; X++ ) {
float T = 1500 + 10 * X; // From 1500K to 8000K
ColorProfile.ComputeWhitePointChromaticities( T, ref xy );
ColorProfile.xyY2XYZ( new float3( xy, 1.0f ), ref XYZ );
// Apply white balancing
XYZ *= whiteBalancingXYZ;
sRGB.XYZ2RGB( new float4( XYZ, 1 ), ref RGB );
// "Normalize"
//RGB /= Math.Max( Math.Max( RGB.x, RGB.y ), RGB.z );
// Isolate D65
if ( Math.Abs( T - whitePointCCT ) < 10.0f )
RGB.Set( 1, 0, 1, 1 );
for ( uint Y=0; Y < 32; Y++ ) {
m_imageFile[X,Y] = RGB;
}
}
// Check white balancing yields correct results
// float3 XYZ_R_in = new float3();
// float3 XYZ_G_in = new float3();
// float3 XYZ_B_in = new float3();
// float3 XYZ_W_in = new float3();
// sRGB.RGB2XYZ( new float3( 1, 0, 0 ), ref XYZ_R_in );
// sRGB.RGB2XYZ( new float3( 0, 1, 0 ), ref XYZ_G_in );
// sRGB.RGB2XYZ( new float3( 0, 0, 1 ), ref XYZ_B_in );
// sRGB.RGB2XYZ( new float3( 1, 1, 1 ), ref XYZ_W_in );
//
// float3 XYZ_R_out = XYZ_R_in * XYZ_D65_D50;
// float3 XYZ_G_out = XYZ_G_in * XYZ_D65_D50;
// float3 XYZ_B_out = XYZ_B_in * XYZ_D65_D50;
// float3 XYZ_W_out = XYZ_W_in * XYZ_D65_D50;
//
// float3 xyY_R_out = new float3();
// float3 xyY_G_out = new float3();
// float3 xyY_B_out = new float3();
// float3 xyY_W_out = new float3();
// ColorProfile.XYZ2xyY( XYZ_R_out, ref xyY_R_out );
// ColorProfile.XYZ2xyY( XYZ_G_out, ref xyY_G_out );
// ColorProfile.XYZ2xyY( XYZ_B_out, ref xyY_B_out );
// ColorProfile.XYZ2xyY( XYZ_W_out, ref xyY_W_out );
}
break;
}
panelColorProfile.Bitmap = m_imageFile.AsBitmap;
}
public void Load( System.IO.Stream _ImageStream, FILE_TYPE _FileType, ColorProfile _ProfileOverride )
{
// Read the file's content
byte[] ImageContent = new byte[_ImageStream.Length];
_ImageStream.Read( ImageContent, 0, (int) _ImageStream.Length );
Load( ImageContent, _FileType, _ProfileOverride );
}
public void Load( byte[] _ImageFileContent, FILE_TYPE _FileType, ColorProfile _ProfileOverride )
{
m_Type = _FileType;
try
{
switch ( _FileType )
{
case FILE_TYPE.JPEG:
case FILE_TYPE.PNG:
case FILE_TYPE.TIFF:
case FILE_TYPE.GIF:
case FILE_TYPE.BMP:
using ( System.IO.MemoryStream Stream = new System.IO.MemoryStream( _ImageFileContent ) )
{
// ===== 1] Load the bitmap source =====
BitmapDecoder Decoder = BitmapDecoder.Create( Stream, BitmapCreateOptions.IgnoreColorProfile | BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnDemand );
if ( Decoder.Frames.Count == 0 )
throw new Exception( "BitmapDecoder failed to read at least one bitmap frame!" );
BitmapFrame Frame = Decoder.Frames[0];
if ( Frame == null )
throw new Exception( "Invalid decoded bitmap!" );
// DEBUG
// int StrideX = (Frame.Format.BitsPerPixel>>3)*Frame.PixelWidth;
// byte[] DebugImageSource = new byte[StrideX*Frame.PixelHeight];
// Frame.CopyPixels( DebugImageSource, StrideX, 0 );
// DEBUG
// pas de gamma sur les JPEG si non spécifié !
// Il y a bien une magouille faite lors de la conversion par le FormatConvertedBitmap!
// ===== 2] Build the color profile =====
m_ColorProfile = _ProfileOverride != null ? _ProfileOverride : new ColorProfile( Frame.Metadata as BitmapMetadata, _FileType );
// ===== 3] Convert the frame to generic RGBA32F =====
ConvertFrame( Frame );
// ===== 4] Convert to CIE XYZ (our device-independent profile connection space) =====
if ( ms_ReadContent && ms_ConvertContent2XYZ )
m_ColorProfile.RGB2XYZ( m_Bitmap, m_Bitmap );
}
break;
case FILE_TYPE.TGA:
{
// Load as a System.Drawing.Bitmap and convert to float4
using ( System.IO.MemoryStream Stream = new System.IO.MemoryStream( _ImageFileContent ) )
using ( TargaImage TGA = new TargaImage( Stream, !ms_ReadContent ) ) {
// Create a default sRGB linear color profile
m_ColorProfile = _ProfileOverride != null ? _ProfileOverride
: new ColorProfile(
ColorProfile.Chromaticities.sRGB, // Use default sRGB color profile
ColorProfile.GAMMA_CURVE.STANDARD, // But with a standard gamma curve...
TGA.ExtensionArea.GammaRatio // ...whose gamma is retrieved from extension data
);
if ( ms_ReadContent ) {
// Convert
byte[] ImageContent = LoadBitmap( TGA.Image, out m_Width, out m_Height );
m_Bitmap = new float4[m_Width,m_Height];
byte A;
int i = 0;
for ( int Y=0; Y < m_Height; Y++ )
for ( int X=0; X < m_Width; X++ )
{
m_Bitmap[X,Y].x = BYTE_TO_FLOAT * ImageContent[i++];
m_Bitmap[X,Y].y = BYTE_TO_FLOAT * ImageContent[i++];
m_Bitmap[X,Y].z = BYTE_TO_FLOAT * ImageContent[i++];
A = ImageContent[i++];
m_bHasAlpha |= A != 0xFF;
m_Bitmap[X,Y].w = BYTE_TO_FLOAT * A;
}
if ( ms_ConvertContent2XYZ ) {
// Convert to CIEXYZ
m_ColorProfile.RGB2XYZ( m_Bitmap, m_Bitmap );
}
} else {
// Only read dimensions
m_Width = TGA.Header.Width;
m_Height = TGA.Header.Height;
}
}
return;
}
case FILE_TYPE.HDR:
{
// Load as XYZ
m_Bitmap = LoadAndDecodeHDRFormat( _ImageFileContent, true, _ProfileOverride, out m_ColorProfile );
m_Width = m_Bitmap.GetLength( 0 );
m_Height = m_Bitmap.GetLength( 1 );
return;
}
#if USE_LIB_RAW
case FILE_TYPE.CRW:
case FILE_TYPE.CR2:
case FILE_TYPE.DNG:
{
using ( System.IO.MemoryStream Stream = new System.IO.MemoryStream( _ImageFileContent ) )
using ( LibRawManaged.RawFile Raw = new LibRawManaged.RawFile() ) {
Raw.UnpackRAW( Stream );
ColorProfile.Chromaticities Chroma = Raw.ColorProfile == LibRawManaged.RawFile.COLOR_PROFILE.ADOBE_RGB
? ColorProfile.Chromaticities.AdobeRGB_D65 // Use Adobe RGB
: ColorProfile.Chromaticities.sRGB; // Use default sRGB color profile
// Create a default sRGB linear color profile
m_ColorProfile = _ProfileOverride != null ? _ProfileOverride
: new ColorProfile(
Chroma,
ColorProfile.GAMMA_CURVE.STANDARD, // But with a standard gamma curve...
1.0f // Linear
);
// Also get back valid camera shot info
m_bHasValidShotInfo = true;
m_ISOSpeed = Raw.ISOSpeed;
m_ShutterSpeed = Raw.ShutterSpeed;
m_Aperture = Raw.Aperture;
m_FocalLength = Raw.FocalLength;
// Convert
m_Width = Raw.Width;
m_Height = Raw.Height;
// float ColorNormalizer = 1.0f / Raw.Maximum;
float ColorNormalizer = 1.0f / 65535.0f;
if ( ms_ReadContent ) {
m_Bitmap = new float4[m_Width,m_Height];
UInt16[,][] ImageContent = Raw.Image;
for ( int Y=0; Y < m_Height; Y++ )
for ( int X=0; X < m_Width; X++ )
{
m_Bitmap[X,Y].x = ImageContent[X,Y][0] * ColorNormalizer;
m_Bitmap[X,Y].y = ImageContent[X,Y][1] * ColorNormalizer;
m_Bitmap[X,Y].z = ImageContent[X,Y][2] * ColorNormalizer;
m_Bitmap[X,Y].w = ImageContent[X,Y][3] * ColorNormalizer;
}
if ( ms_ConvertContent2XYZ ) {
// Convert to CIEXYZ
m_ColorProfile.RGB2XYZ( m_Bitmap, m_Bitmap );
}
}
}
#region My poor attempt at reading CRW files
// using ( System.IO.MemoryStream Stream = new System.IO.MemoryStream( _ImageFileContent ) )
// using ( CanonRawLoader CRWLoader = new CanonRawLoader( Stream ) )
// {
// ColorProfile.Chromaticities Chroma = CRWLoader.m_ColorProfile == CanonRawLoader.DataColorProfile.COLOR_PROFILE.ADOBE_RGB
// ? ColorProfile.Chromaticities.AdobeRGB_D65 // Use Adobe RGB
// : ColorProfile.Chromaticities.sRGB; // Use default sRGB color profile
//
// // Create a default sRGB linear color profile
// m_ColorProfile = new ColorProfile(
// Chroma,
// ColorProfile.GAMMA_CURVE.STANDARD, // But with a standard gamma curve...
// 1.0f // Linear
// );
//
// // Convert
// m_Width = CRWLoader.m_RAWImage.m_Width;
// m_Height = CRWLoader.m_RAWImage.m_Height;
//
// m_Bitmap = new float4[m_Width,m_Height];
// UInt16[] ImageContent = CRWLoader.m_RAWImage.m_DecodedImage;
// int i = 0;
// // for ( int Y=0; Y < m_Height; Y++ )
// // for ( int X=0; X < m_Width; X++ )
// // {
// // m_Bitmap[X,Y].x = ImageContent[i++] / 4096.0f;
// // m_Bitmap[X,Y].y = ImageContent[i++] / 4096.0f;
// // m_Bitmap[X,Y].z = ImageContent[i++] / 4096.0f;
// // i++;
// // }
//
// i=0;
// for ( int Y=0; Y < m_Height; Y++ )
// for ( int X=0; X < m_Width; X++ )
// m_Bitmap[X,Y].x = ImageContent[i++] / 4096.0f;
// i=0;
// for ( int Y=0; Y < m_Height; Y++ )
// for ( int X=0; X < m_Width; X++ )
// m_Bitmap[X,Y].y = ImageContent[i++] / 4096.0f;
// i=0;
// for ( int Y=0; Y < m_Height; Y++ )
// for ( int X=0; X < m_Width; X++ )
// m_Bitmap[X,Y].z = ImageContent[i++] / 4096.0f;
//
// // Convert to CIEXYZ
// m_ColorProfile.RGB2XYZ( m_Bitmap );
// }
#endregion
return;
}
#endif
default:
throw new NotSupportedException( "The image file type \"" + _FileType + "\" is not supported by the Bitmap class!" );
}
}
catch ( Exception )
{
throw; // Go on !
}
}
/// <summary>
/// Creates a bitmap from a System.Drawing.Bitmap and a color profile
/// </summary>
/// <param name="_Device"></param>
/// <param name="_Name"></param>
/// <param name="_Bitmap">The System.Drawing.Bitmap</param>
/// <param name="_ColorProfile">The color profile to use to transform the bitmap</param>
public Bitmap( System.Drawing.Bitmap _Bitmap, ColorProfile _ColorProfile )
{
if ( _ColorProfile == null )
throw new Exception( "Invalid profile: can't convert to CIE XYZ!" );
m_ColorProfile = _ColorProfile;
// Load the bitmap's content and copy it to a double entry array
byte[] BitmapContent = LoadBitmap( _Bitmap, out m_Width, out m_Height );
if ( BitmapContent == null )
return;
m_Bitmap = new float4[m_Width,m_Height];
int i=0;
for ( int Y=0; Y < m_Height; Y++ )
for ( int X=0; X < m_Width; X++ )
{
m_Bitmap[X,Y] = new float4(
BYTE_TO_FLOAT * BitmapContent[i++], // R
BYTE_TO_FLOAT * BitmapContent[i++], // G
BYTE_TO_FLOAT * BitmapContent[i++], // B
BYTE_TO_FLOAT * BitmapContent[i++] // A
);
}
if ( ms_ConvertContent2XYZ ) {
// Convert to CIE XYZ
m_ColorProfile.RGB2XYZ( m_Bitmap, m_Bitmap );
}
}
public void Load( System.IO.FileInfo _ImageFileName, FILE_TYPE _FileType, ColorProfile _ProfileOverride )
{
using ( System.IO.FileStream ImageStream = _ImageFileName.Open( System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read ) )
Load( ImageStream, _FileType, _ProfileOverride );
}
/// <summary>
/// Creates a bitmap from memory
/// </summary>
/// <param name="_Device"></param>
/// <param name="_Name"></param>
/// <param name="_ImageFileContent">The memory buffer to load the bitmap from</param>
/// <param name="_ImageFileNameName">The name of the image file the stream is coming from originally (used to identify image file type)</param>
public Bitmap( byte[] _ImageFileContent, System.IO.FileInfo _ImageFileNameName, ColorProfile _ProfileOverride )
{
Load( _ImageFileContent, GetFileType( _ImageFileNameName ), _ProfileOverride );
}
/// <summary>
/// Creates a bitmap from memory
/// </summary>
/// <param name="_Device"></param>
/// <param name="_Name"></param>
/// <param name="_ImageFileContent">The memory buffer to load the bitmap from</param>
/// <param name="_FileType">The image type</param>
public Bitmap( byte[] _ImageFileContent, FILE_TYPE _FileType, ColorProfile _ProfileOverride )
{
Load( _ImageFileContent, _FileType, _ProfileOverride );
}
/// <summary>
/// Creates a bitmap from a stream
/// </summary>
/// <param name="_Device"></param>
/// <param name="_Name"></param>
/// <param name="_ImageStream">The image stream to load the bitmap from</param>
/// <param name="_ImageFileNameName">The name of the image file the stream is coming from originally (used to identify image file type)</param>
public Bitmap( System.IO.Stream _ImageStream, System.IO.FileInfo _ImageFileNameName, ColorProfile _ProfileOverride )
{
Load( _ImageStream, GetFileType( _ImageFileNameName ), _ProfileOverride );
}
/// <summary>
/// Creates a bitmap from a stream
/// </summary>
/// <param name="_Device"></param>
/// <param name="_Name"></param>
/// <param name="_ImageStream">The image stream to load the bitmap from</param>
/// <param name="_FileType">The image type</param>
public Bitmap( System.IO.Stream _ImageStream, FILE_TYPE _FileType, ColorProfile _ProfileOverride )
{
Load( _ImageStream, _FileType, _ProfileOverride );
}
/// <summary>
/// Manual creation
/// </summary>
/// <param name="_Width"></param>
/// <param name="_Height"></param>
/// <param name="_Profile">An optional color profile, you will need a valid profile if you wish to save the bitmap!</param>
public Bitmap( int _Width, int _Height, ColorProfile _Profile )
{
m_Width = _Width;
m_Height = _Height;
m_Bitmap = new float4[m_Width,m_Height];
for ( int Y=0; Y < m_Height; Y++ )
for ( int X=0; X < m_Width; X++ )
m_Bitmap[X,Y] = new float4( 0, 0, 0, 0 );
m_ColorProfile = _Profile;
}
/// <summary>
/// Decodes a RGBE formatted image into a plain floating-point image
/// </summary>
/// <param name="_Source">The source RGBE formatted image</param>
/// <param name="_bSourceIsXYZ">Tells if the source image is encoded as XYZE rather than RGBE</param>
/// <param name="_Target">The target float4 image</param>
/// <param name="_bTargetNeedsXYZ">Tells if the target needs to be in CIE XYZ space (true) or RGB (false)</param>
/// <param name="_ColorProfile">The color profile for the image</param>
public static void DecodeRGBEImage( PF_RGBE[,] _Source, bool _bSourceIsXYZ, float4[,] _Target, bool _bTargetNeedsXYZ, ColorProfile _ColorProfile )
{
if ( _bSourceIsXYZ ^ _bTargetNeedsXYZ )
{ // Requires conversion...
if ( _bSourceIsXYZ )
{ // Convert from XYZ to RGB
for ( int Y=0; Y < _Source.GetLength( 1 ); Y++ )
for ( int X=0; X < _Source.GetLength( 0 ); X++ )
_Target[X,Y] = _ColorProfile.XYZ2RGB( new float4( _Source[X,Y].DecodedColor.x, _Source[X,Y].DecodedColor.y, _Source[X,Y].DecodedColor.z, 1.0f ) );
}
else
{ // Convert from RGB to XYZ
for ( int Y=0; Y < _Source.GetLength( 1 ); Y++ )
for ( int X=0; X < _Source.GetLength( 0 ); X++ )
_Target[X,Y] = _ColorProfile.RGB2XYZ( new float4( _Source[X,Y].DecodedColor.x, _Source[X,Y].DecodedColor.y, _Source[X,Y].DecodedColor.z, 1.0f ) );
}
return;
}
// Simply decode vector and leave as-is
for ( int Y=0; Y < _Source.GetLength( 1 ); Y++ )
for ( int X=0; X < _Source.GetLength( 0 ); X++ )
_Target[X,Y] = new float4( _Source[X,Y].DecodedColor.x, _Source[X,Y].DecodedColor.y, _Source[X,Y].DecodedColor.z, 1.0f );
}
/// <summary>
/// Decodes a RGBE formatted image into a plain floating-point image
/// </summary>
/// <param name="_Source">The source RGBE formatted image</param>
/// <param name="_bSourceIsXYZ">Tells if the source image is encoded as XYZE rather than RGBE</param>
/// <param name="_bTargetNeedsXYZ">Tells if the target needs to be in CIE XYZ space (true) or RGB (false)</param>
/// <param name="_ColorProfile">The color profile for the image</param>
/// <returns>A HDR image as floats</returns>
public static float4[,] DecodeRGBEImage( PF_RGBE[,] _Source, bool _bSourceIsXYZ, bool _bTargetNeedsXYZ, ColorProfile _ColorProfile )
{
if ( _Source == null )
return null;
float4[,] Result = new float4[_Source.GetLength( 0 ), _Source.GetLength( 1 )];
DecodeRGBEImage( _Source, _bSourceIsXYZ, Result, _bTargetNeedsXYZ, _ColorProfile );
return Result;
}
/// <summary>
/// Loads a bitmap in .HDR format into a RGBE array
/// </summary>
/// <param name="_HDRFormatBinary"></param>
/// <param name="_bIsXYZ">Tells if the image is encoded as XYZE rather than RGBE</param>
/// <param name="_ColorProfile">The color profile for the image</param>
/// <returns></returns>
public static unsafe PF_RGBE[,] LoadHDRFormat( byte[] _HDRFormatBinary, ColorProfile _ProfileOverride, out bool _bIsXYZ, out ColorProfile _ColorProfile )
{
try
{
// The header of a .HDR image file consists of lines terminated by '\n'
// It ends when there are 2 successive '\n' characters, then follows a single line containing the resolution of the image and only then, real scanlines begin...
//
// 1] We must isolate the header and find where it ends.
// To do this, we seek and replace every '\n' characters by '\0' (easier to read) until we find a double '\n'
List<string> HeaderLines = new List<string>();
int CharacterIndex = 0;
int LineStartCharacterIndex = 0;
while ( true )
{
if ( _HDRFormatBinary[CharacterIndex] == '\n' || _HDRFormatBinary[CharacterIndex] == '\0' )
{ // Found a new line!
_HDRFormatBinary[CharacterIndex] = 0;
fixed ( byte* pLineStart = &_HDRFormatBinary[LineStartCharacterIndex] )
HeaderLines.Add( new string( (sbyte*) pLineStart, 0, CharacterIndex-LineStartCharacterIndex, System.Text.Encoding.ASCII ) );
LineStartCharacterIndex = CharacterIndex + 1;
// Check for header end
if ( _HDRFormatBinary[CharacterIndex + 2] == '\n' )
{
CharacterIndex += 3;
break;
}
if ( _HDRFormatBinary[CharacterIndex + 1] == '\n' )
{
CharacterIndex += 2;
break;
}
}
// Next character
CharacterIndex++;
}
// 2] Read the last line containing the resolution of the image
byte* pScanlines = null;
string Resolution = null;
LineStartCharacterIndex = CharacterIndex;
while ( true )
{
if ( _HDRFormatBinary[CharacterIndex] == '\n' || _HDRFormatBinary[CharacterIndex] == '\0' )
{
_HDRFormatBinary[CharacterIndex] = 0;
fixed ( byte* pLineStart = &_HDRFormatBinary[LineStartCharacterIndex] )
Resolution = new string( (sbyte*) pLineStart, 0, CharacterIndex-LineStartCharacterIndex, System.Text.Encoding.ASCII );
fixed ( byte* pScanlinesStart = &_HDRFormatBinary[CharacterIndex + 1] )
pScanlines = pScanlinesStart;
break;
}
// Next character
CharacterIndex++;
}
// 3] Check format and retrieve resolution
// 3.1] Search lines for "#?RADIANCE" or "#?RGBE"
if ( RadianceFileFindInHeader( HeaderLines, "#?RADIANCE" ) == null && RadianceFileFindInHeader( HeaderLines, "#?RGBE" ) == null )
throw new NotSupportedException( "Unknown HDR format!" ); // Unknown HDR file format!
// 3.2] Search lines for format
string FileFormat = RadianceFileFindInHeader( HeaderLines, "FORMAT=" );
if ( FileFormat == null )
throw new Exception( "No format description!" ); // Couldn't get FORMAT
_bIsXYZ = false;
if ( FileFormat.IndexOf( "32-bit_rle_rgbe" ) == -1 )
{ // Check for XYZ encoding
_bIsXYZ = true;
if ( FileFormat.IndexOf( "32-bit_rle_xyze" ) == -1 )
throw new Exception( "Can't read format \"" + FileFormat + "\". Only 32-bit-rle-rgbe or 32-bit_rle_xyze is currently supported!" );
}
// 3.3] Search lines for the exposure
float fExposure = 0.0f;
string ExposureText = RadianceFileFindInHeader( HeaderLines, "EXPOSURE=" );
if ( ExposureText != null )
float.TryParse( ExposureText, out fExposure );
// 3.4] Read the color primaries
ColorProfile.Chromaticities Chromas = ColorProfile.Chromaticities.Radiance; // Default chromaticities
string PrimariesText = RadianceFileFindInHeader( HeaderLines, "PRIMARIES=" );
if ( PrimariesText != null )
{
string[] Primaries = PrimariesText.Split( ' ' );
if ( Primaries == null || Primaries.Length != 8 )
throw new Exception( "Failed to parse color profile chromaticities !" );
float.TryParse( Primaries[0], out Chromas.R.x );
float.TryParse( Primaries[1], out Chromas.R.y );
float.TryParse( Primaries[2], out Chromas.G.x );
float.TryParse( Primaries[3], out Chromas.G.y );
float.TryParse( Primaries[4], out Chromas.B.x );
float.TryParse( Primaries[5], out Chromas.B.y );
float.TryParse( Primaries[6], out Chromas.W.x );
float.TryParse( Primaries[7], out Chromas.W.y );
}
// 3.5] Create the color profile
if ( _ProfileOverride == null )
{
_ColorProfile = new ColorProfile( Chromas, ColorProfile.GAMMA_CURVE.STANDARD, 1.0f );
_ColorProfile.Exposure = fExposure;
}
else
_ColorProfile = _ProfileOverride;
// 3.6] Read the resolution out of the last line
int WayX = +1, WayY = +1;
int Width = 0, Height = 0;
int XIndex = Resolution.IndexOf( "+X" );
if ( XIndex == -1 )
{ // Wrong way!
WayX = -1;
XIndex = Resolution.IndexOf( "-X" );
}
if ( XIndex == -1 )
throw new Exception( "Couldn't find image width in resolution string \"" + Resolution + "\"!" );
int WidthEndCharacterIndex = Resolution.IndexOf( ' ', XIndex + 3 );
if ( WidthEndCharacterIndex == -1 )
WidthEndCharacterIndex = Resolution.Length;
Width = int.Parse( Resolution.Substring( XIndex + 2, WidthEndCharacterIndex - XIndex - 2 ) );
int YIndex = Resolution.IndexOf( "+Y" );
if ( YIndex == -1 )
{ // Flipped !
WayY = -1;
YIndex = Resolution.IndexOf( "-Y" );
}
if ( YIndex == -1 )
throw new Exception( "Couldn't find image height in resolution string \"" + Resolution + "\"!" );
int HeightEndCharacterIndex = Resolution.IndexOf( ' ', YIndex + 3 );
if ( HeightEndCharacterIndex == -1 )
HeightEndCharacterIndex = Resolution.Length;
Height = int.Parse( Resolution.Substring( YIndex + 2, HeightEndCharacterIndex - YIndex - 2 ) );
// The encoding of the image data is quite simple:
//
// _ Each floating-point component is first encoded in Greg Ward's packed-pixel format which encodes 3 floats into a single DWORD organized this way: RrrrrrrrGgggggggBbbbbbbbEeeeeeee (E being the common exponent)
// _ Each component of the packed-pixel is then encoded separately using a simple run-length encoding format
//
PF_RGBE[,] Dest = null;
if ( ms_ReadContent ) {
// 1] Allocate memory for the image and the temporary p_HDRFormatBinaryScanline
Dest = new PF_RGBE[Width, Height];
// 2] Read the scanlines
byte[,] TempScanline = new byte[Width,4];
int ImageY = WayY == +1 ? 0 : Height - 1;
for ( int y=0; y < Height; y++, ImageY += WayY )
{
if ( Width < 8 || Width > 0x7FFF || pScanlines[0] != 0x02 )
throw new Exception( "Unsupported old encoding format!" );
byte Temp;
byte Green, Blue;
// 2.1] Read an entire scanline
pScanlines++;
Green = *pScanlines++;
Blue = *pScanlines++;
Temp = *pScanlines++;
if ( Green != 2 || (Blue & 0x80) != 0 )
throw new Exception( "Unsupported old encoding format!" );
if ( ((Blue << 8) | Temp) != Width )
throw new Exception( "Line and image widths mismatch!" );
for ( int ComponentIndex=0; ComponentIndex < 4; ComponentIndex++ )
{
for ( int x=0; x < Width; )
{
byte Code = *pScanlines++;
if ( Code > 128 )
{ // Run-Length encoding
Code &= 0x7F;
byte RLValue = *pScanlines++;
while ( Code-- > 0 && x < Width )
TempScanline[x++,ComponentIndex] = RLValue;
}
else
{ // Normal encoding
while ( Code-- > 0 && x < Width )
TempScanline[x++, ComponentIndex] = *pScanlines++;
}
} // For every pixels of the scanline
} // For every color components (including exponent)
// 2.2] Post-process the scanline and re-order it correctly
int ImageX = WayX == +1 ? 0 : Width - 1;
for ( int x=0; x < Width; x++, ImageX += WayX )
{
Dest[x,y].R = TempScanline[ImageX, 0];
Dest[x,y].G = TempScanline[ImageX, 1];
Dest[x,y].B = TempScanline[ImageX, 2];
Dest[x,y].E = TempScanline[ImageX, 3];
}
}
}
return Dest;
}
catch ( Exception _e )
{ // Ouch!
throw new Exception( "An exception occured while attempting to load an HDR file!", _e );
}
}
/// <summary>
/// Loads a bitmap in .HDR format into a float4 array directly useable by the image constructor
/// </summary>
/// <param name="_HDRFormatBinary"></param>
/// <param name="_bTargetNeedsXYZ">Tells if the target needs to be in CIE XYZ space (true) or RGB (false)</param>
/// <param name="_ColorProfile">The color profile for the image</param>
/// <returns></returns>
public static float4[,] LoadAndDecodeHDRFormat( byte[] _HDRFormatBinary, bool _bTargetNeedsXYZ, ColorProfile _ProfileOverride, out ColorProfile _ColorProfile )
{
bool bSourceIsXYZ;
return DecodeRGBEImage( LoadHDRFormat( _HDRFormatBinary, _ProfileOverride, out bSourceIsXYZ, out _ColorProfile ), bSourceIsXYZ, _bTargetNeedsXYZ, _ColorProfile );
}