FreeImage updated to 3.16

git-svn-id: http://svn.miranda-ng.org/main/trunk@11379 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 479 insertions, 479 deletions

diff --git a/plugins/AdvaImg/src/FreeImage/tmoColorConvert.cpp b/plugins/AdvaImg/src/FreeImage/tmoColorConvert.cpp
index 66869b2806..6b103a08c1 100644
--- a/plugins/AdvaImg/src/FreeImage/tmoColorConvert.cpp
+++ b/plugins/AdvaImg/src/FreeImage/tmoColorConvert.cpp
@@ -1,479 +1,479 @@
-// ==========================================================

-// High Dynamic Range bitmap conversion routines

-//

-// Design and implementation by

-// - Hervé Drolon (drolon@infonie.fr)

-// - Mihail Naydenov (mnaydenov@users.sourceforge.net)

-//

-// This file is part of FreeImage 3

-//

-// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY

-// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES

-// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE

-// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED

-// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT

-// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY

-// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL

-// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER

-// THIS DISCLAIMER.

-//

-// Use at your own risk!

-// ==========================================================

-

-#include "FreeImage.h"

-#include "Utilities.h"

-#include "ToneMapping.h"

-

-// ----------------------------------------------------------

-// Convert RGB to and from Yxy, same as in Reinhard et al. SIGGRAPH 2002

-// References : 

-// [1] Radiance Home Page [Online] http://radsite.lbl.gov/radiance/HOME.html

-// [2] E. Reinhard, M. Stark, P. Shirley, and J. Ferwerda,  

-//     Photographic Tone Reproduction for Digital Images, ACM Transactions on Graphics, 

-//     21(3):267-276, 2002 (Proceedings of SIGGRAPH 2002). 

-// [3] J. Tumblin and H.E. Rushmeier, 

-//     Tone Reproduction for Realistic Images. IEEE Computer Graphics and Applications, 

-//     13(6):42-48, 1993.

-// ----------------------------------------------------------

-

-/**

-nominal CRT primaries 

-*/

-/*

-static const float CIE_x_r = 0.640F;

-static const float CIE_y_r = 0.330F;

-static const float CIE_x_g = 0.290F;

-static const float CIE_y_g = 0.600F;

-static const float CIE_x_b = 0.150F;

-static const float CIE_y_b = 0.060F;

-static const float CIE_x_w = 0.3333F;	// use true white

-static const float CIE_y_w = 0.3333F;

-*/

-/**

-sRGB primaries

-*/

-static const float CIE_x_r = 0.640F;

-static const float CIE_y_r = 0.330F;

-static const float CIE_x_g = 0.300F;

-static const float CIE_y_g = 0.600F;

-static const float CIE_x_b = 0.150F;

-static const float CIE_y_b = 0.060F;

-static const float CIE_x_w = 0.3127F;	// Illuminant D65

-static const float CIE_y_w = 0.3290F;

-

-static const float CIE_D = ( CIE_x_r*(CIE_y_g - CIE_y_b) + CIE_x_g*(CIE_y_b - CIE_y_r) + CIE_x_b*(CIE_y_r - CIE_y_g) );

-static const float CIE_C_rD = ( (1/CIE_y_w) * ( CIE_x_w*(CIE_y_g - CIE_y_b) - CIE_y_w*(CIE_x_g - CIE_x_b) + CIE_x_g*CIE_y_b - CIE_x_b*CIE_y_g) );

-static const float CIE_C_gD = ( (1/CIE_y_w) * ( CIE_x_w*(CIE_y_b - CIE_y_r) - CIE_y_w*(CIE_x_b - CIE_x_r) - CIE_x_r*CIE_y_b + CIE_x_b*CIE_y_r) );

-static const float CIE_C_bD = ( (1/CIE_y_w) * ( CIE_x_w*(CIE_y_r - CIE_y_g) - CIE_y_w*(CIE_x_r - CIE_x_g) + CIE_x_r*CIE_y_g - CIE_x_g*CIE_y_r) );

-

-/**

-RGB to XYZ (no white balance)

-*/

-static const float  RGB2XYZ[3][3] = {

-	{ CIE_x_r*CIE_C_rD / CIE_D, 

-	  CIE_x_g*CIE_C_gD / CIE_D, 

-	  CIE_x_b*CIE_C_bD / CIE_D 

-	},

-	{ CIE_y_r*CIE_C_rD / CIE_D, 

-	  CIE_y_g*CIE_C_gD / CIE_D, 

-	  CIE_y_b*CIE_C_bD / CIE_D 

-	},

-	{ (1 - CIE_x_r-CIE_y_r)*CIE_C_rD / CIE_D,

-	  (1 - CIE_x_g-CIE_y_g)*CIE_C_gD / CIE_D,

-	  (1 - CIE_x_b-CIE_y_b)*CIE_C_bD / CIE_D

-	}

-};

-

-/**

-XYZ to RGB (no white balance)

-*/

-static const float  XYZ2RGB[3][3] = {

-	{(CIE_y_g - CIE_y_b - CIE_x_b*CIE_y_g + CIE_y_b*CIE_x_g) / CIE_C_rD,

-	 (CIE_x_b - CIE_x_g - CIE_x_b*CIE_y_g + CIE_x_g*CIE_y_b) / CIE_C_rD,

-	 (CIE_x_g*CIE_y_b - CIE_x_b*CIE_y_g) / CIE_C_rD

-	},

-	{(CIE_y_b - CIE_y_r - CIE_y_b*CIE_x_r + CIE_y_r*CIE_x_b) / CIE_C_gD,

-	 (CIE_x_r - CIE_x_b - CIE_x_r*CIE_y_b + CIE_x_b*CIE_y_r) / CIE_C_gD,

-	 (CIE_x_b*CIE_y_r - CIE_x_r*CIE_y_b) / CIE_C_gD

-	},

-	{(CIE_y_r - CIE_y_g - CIE_y_r*CIE_x_g + CIE_y_g*CIE_x_r) / CIE_C_bD,

-	 (CIE_x_g - CIE_x_r - CIE_x_g*CIE_y_r + CIE_x_r*CIE_y_g) / CIE_C_bD,

-	 (CIE_x_r*CIE_y_g - CIE_x_g*CIE_y_r) / CIE_C_bD

-	}

-};

-

-/**

-This gives approximately the following matrices : 

-

-static const float RGB2XYZ[3][3] = { 

-	{ 0.41239083F, 0.35758433F, 0.18048081F },

-	{ 0.21263903F, 0.71516865F, 0.072192319F },

-	{ 0.019330820F, 0.11919473F, 0.95053220F }

-};

-static const float XYZ2RGB[3][3] = { 

-	{ 3.2409699F, -1.5373832F, -0.49861079F },

-	{ -0.96924376F, 1.8759676F, 0.041555084F },

-	{ 0.055630036F, -0.20397687F, 1.0569715F }

-};

-*/

-

-// ----------------------------------------------------------

-

-static const float EPSILON = 1e-06F;

-static const float INF = 1e+10F;

-

-/**

-Convert in-place floating point RGB data to Yxy.<br>

-On output, pixel->red == Y, pixel->green == x, pixel->blue == y

-@param dib Input RGBF / Output Yxy image

-@return Returns TRUE if successful, returns FALSE otherwise

-*/

-BOOL 

-ConvertInPlaceRGBFToYxy(FIBITMAP *dib) {

-	float result[3];

-

-	if(FreeImage_GetImageType(dib) != FIT_RGBF)

-		return FALSE;

-

-	const unsigned width  = FreeImage_GetWidth(dib);

-	const unsigned height = FreeImage_GetHeight(dib);

-	const unsigned pitch  = FreeImage_GetPitch(dib);

-	

-	BYTE *bits = (BYTE*)FreeImage_GetBits(dib);

-	for(unsigned y = 0; y < height; y++) {

-		FIRGBF *pixel = (FIRGBF*)bits;

-		for(unsigned x = 0; x < width; x++) {

-			result[0] = result[1] = result[2] = 0;

-			for (int i = 0; i < 3; i++) {

-				result[i] += RGB2XYZ[i][0] * pixel[x].red;

-				result[i] += RGB2XYZ[i][1] * pixel[x].green;

-				result[i] += RGB2XYZ[i][2] * pixel[x].blue;

-			}

-			const float W = result[0] + result[1] + result[2];

-			const float Y = result[1];

-			if(W > 0) { 

-				pixel[x].red   = Y;			    // Y 

-				pixel[x].green = result[0] / W;	// x 

-				pixel[x].blue  = result[1] / W;	// y 	

-			} else {

-				pixel[x].red = pixel[x].green = pixel[x].blue = 0;

-			}

-		}

-		// next line

-		bits += pitch;

-	}

-

-	return TRUE;

-}

-

-/**

-Convert in-place Yxy image to floating point RGB data.<br>

-On input, pixel->red == Y, pixel->green == x, pixel->blue == y

-@param dib Input Yxy / Output RGBF image

-@return Returns TRUE if successful, returns FALSE otherwise

-*/

-BOOL 

-ConvertInPlaceYxyToRGBF(FIBITMAP *dib) {

-	float result[3];

-	float X, Y, Z;

-

-	if(FreeImage_GetImageType(dib) != FIT_RGBF)

-		return FALSE;

-

-	const unsigned width  = FreeImage_GetWidth(dib);

-	const unsigned height = FreeImage_GetHeight(dib);

-	const unsigned pitch  = FreeImage_GetPitch(dib);

-

-	BYTE *bits = (BYTE*)FreeImage_GetBits(dib);

-	for(unsigned y = 0; y < height; y++) {

-		FIRGBF *pixel = (FIRGBF*)bits;

-		for(unsigned x = 0; x < width; x++) {

-			Y = pixel[x].red;	        // Y 

-			result[1] = pixel[x].green;	// x 

-			result[2] = pixel[x].blue;	// y 

-			if ((Y > EPSILON) && (result[1] > EPSILON) && (result[2] > EPSILON)) {

-				X = (result[1] * Y) / result[2];

-				Z = (X / result[1]) - X - Y;

-			} else {

-				X = Z = EPSILON;

-			}

-			pixel[x].red   = X;

-			pixel[x].green = Y;

-			pixel[x].blue  = Z;

-			result[0] = result[1] = result[2] = 0;

-			for (int i = 0; i < 3; i++) {

-				result[i] += XYZ2RGB[i][0] * pixel[x].red;

-				result[i] += XYZ2RGB[i][1] * pixel[x].green;

-				result[i] += XYZ2RGB[i][2] * pixel[x].blue;

-			}

-			pixel[x].red   = result[0];	// R

-			pixel[x].green = result[1];	// G

-			pixel[x].blue  = result[2];	// B

-		}

-		// next line

-		bits += pitch;

-	}

-

-	return TRUE;

-}

-

-/**

-Get the maximum, minimum and average luminance.<br>

-On input, pixel->red == Y, pixel->green == x, pixel->blue == y

-@param Yxy Source Yxy image to analyze

-@param maxLum Maximum luminance

-@param minLum Minimum luminance

-@param worldLum Average luminance (world adaptation luminance)

-@return Returns TRUE if successful, returns FALSE otherwise

-*/

-BOOL 

-LuminanceFromYxy(FIBITMAP *Yxy, float *maxLum, float *minLum, float *worldLum) {

-	if(FreeImage_GetImageType(Yxy) != FIT_RGBF)

-		return FALSE;

-

-	const unsigned width  = FreeImage_GetWidth(Yxy);

-	const unsigned height = FreeImage_GetHeight(Yxy);

-	const unsigned pitch  = FreeImage_GetPitch(Yxy);

-

-	float max_lum = 0, min_lum = 0;

-	double sum = 0;

-

-	BYTE *bits = (BYTE*)FreeImage_GetBits(Yxy);

-	for(unsigned y = 0; y < height; y++) {

-		const FIRGBF *pixel = (FIRGBF*)bits;

-		for(unsigned x = 0; x < width; x++) {

-			const float Y = pixel[x].red;

-			max_lum = (max_lum < Y) ? Y : max_lum;	// max Luminance in the scene

-			min_lum = (min_lum < Y) ? min_lum : Y;	// min Luminance in the scene

-			sum += log(2.3e-5F + Y);				// contrast constant in Tumblin paper

-		}

-		// next line

-		bits += pitch;

-	}

-	// maximum luminance

-	*maxLum = max_lum;

-	// minimum luminance

-	*minLum = min_lum;

-	// average log luminance

-	double avgLogLum = (sum / (width * height));

-	// world adaptation luminance

-	*worldLum = (float)exp(avgLogLum);

-

-	return TRUE;

-}

-

-/**

-Clamp RGBF image highest values to display white, 

-then convert to 24-bit RGB

-*/

-FIBITMAP* 

-ClampConvertRGBFTo24(FIBITMAP *src) {

-	if(FreeImage_GetImageType(src) != FIT_RGBF)

-		return FALSE;

-

-	const unsigned width  = FreeImage_GetWidth(src);

-	const unsigned height = FreeImage_GetHeight(src);

-

-	FIBITMAP *dst = FreeImage_Allocate(width, height, 24, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);

-	if(!dst) return NULL;

-

-	const unsigned src_pitch  = FreeImage_GetPitch(src);

-	const unsigned dst_pitch  = FreeImage_GetPitch(dst);

-

-	BYTE *src_bits = (BYTE*)FreeImage_GetBits(src);

-	BYTE *dst_bits = (BYTE*)FreeImage_GetBits(dst);

-

-	for(unsigned y = 0; y < height; y++) {

-		const FIRGBF *src_pixel = (FIRGBF*)src_bits;

-		BYTE *dst_pixel = (BYTE*)dst_bits;

-		for(unsigned x = 0; x < width; x++) {

-			const float red   = (src_pixel[x].red > 1)   ? 1 : src_pixel[x].red;

-			const float green = (src_pixel[x].green > 1) ? 1 : src_pixel[x].green;

-			const float blue  = (src_pixel[x].blue > 1)  ? 1 : src_pixel[x].blue;

-			

-			dst_pixel[FI_RGBA_RED]   = (BYTE)(255.0F * red   + 0.5F);

-			dst_pixel[FI_RGBA_GREEN] = (BYTE)(255.0F * green + 0.5F);

-			dst_pixel[FI_RGBA_BLUE]  = (BYTE)(255.0F * blue  + 0.5F);

-			dst_pixel += 3;

-		}

-		src_bits += src_pitch;

-		dst_bits += dst_pitch;

-	}

-

-	return dst;

-}

-

-/**

-Extract the luminance channel L from a RGBF image. 

-Luminance is calculated from the sRGB model (RGB2XYZ matrix) 

-using a D65 white point : 

-L = ( 0.2126 * r ) + ( 0.7152 * g ) + ( 0.0722 * b )

-Reference : 

-A Standard Default Color Space for the Internet - sRGB. 

-[online] http://www.w3.org/Graphics/Color/sRGB

-*/

-FIBITMAP*  

-ConvertRGBFToY(FIBITMAP *src) {

-	if(FreeImage_GetImageType(src) != FIT_RGBF)

-		return FALSE;

-

-	const unsigned width  = FreeImage_GetWidth(src);

-	const unsigned height = FreeImage_GetHeight(src);

-

-	FIBITMAP *dst = FreeImage_AllocateT(FIT_FLOAT, width, height);

-	if(!dst) return NULL;

-

-	const unsigned src_pitch  = FreeImage_GetPitch(src);

-	const unsigned dst_pitch  = FreeImage_GetPitch(dst);

-

-	

-	BYTE *src_bits = (BYTE*)FreeImage_GetBits(src);

-	BYTE *dst_bits = (BYTE*)FreeImage_GetBits(dst);

-

-	for(unsigned y = 0; y < height; y++) {

-		const FIRGBF *src_pixel = (FIRGBF*)src_bits;

-		float  *dst_pixel = (float*)dst_bits;

-		for(unsigned x = 0; x < width; x++) {

-			const float L = LUMA_REC709(src_pixel[x].red, src_pixel[x].green, src_pixel[x].blue);

-			dst_pixel[x] = (L > 0) ? L : 0;

-		}

-		// next line

-		src_bits += src_pitch;

-		dst_bits += dst_pitch;

-	}

-

-	return dst;

-}

-

-/**

-Get the maximum, minimum, average luminance and log average luminance from a Y image

-@param dib Source Y image to analyze

-@param maxLum Maximum luminance

-@param minLum Minimum luminance

-@param Lav Average luminance

-@param Llav Log average luminance (also known as 'world adaptation luminance')

-@return Returns TRUE if successful, returns FALSE otherwise

-@see ConvertRGBFToY, FreeImage_TmoReinhard05Ex

-*/

-BOOL 

-LuminanceFromY(FIBITMAP *dib, float *maxLum, float *minLum, float *Lav, float *Llav) {

-	if(FreeImage_GetImageType(dib) != FIT_FLOAT)

-		return FALSE;

-

-	unsigned width  = FreeImage_GetWidth(dib);

-	unsigned height = FreeImage_GetHeight(dib);

-	unsigned pitch  = FreeImage_GetPitch(dib);

-

-	float max_lum = -1e20F, min_lum = 1e20F;

-	double sumLum = 0, sumLogLum = 0;

-

-	BYTE *bits = (BYTE*)FreeImage_GetBits(dib);

-	for(unsigned y = 0; y < height; y++) {

-		const float *pixel = (float*)bits;

-		for(unsigned x = 0; x < width; x++) {

-			const float Y = pixel[x];

-			max_lum = (max_lum < Y) ? Y : max_lum;				// max Luminance in the scene

-			min_lum = ((Y > 0) && (min_lum < Y)) ? min_lum : Y;	// min Luminance in the scene

-			sumLum += Y;										// average luminance

-			sumLogLum += log(2.3e-5F + Y);						// contrast constant in Tumblin paper

-		}

-		// next line

-		bits += pitch;

-	}

-

-	// maximum luminance

-	*maxLum = max_lum;

-	// minimum luminance

-	*minLum = min_lum;

-	// average luminance

-	*Lav = (float)(sumLum / (width * height));

-	// average log luminance, a.k.a. world adaptation luminance

-	*Llav = (float)exp(sumLogLum / (width * height));

-

-	return TRUE;

-}

-// --------------------------------------------------------------------------

-

-static void findMaxMinPercentile(FIBITMAP *Y, float minPrct, float *minLum, float maxPrct, float *maxLum) {

-	int x, y;

-	int width = FreeImage_GetWidth(Y);

-	int height = FreeImage_GetHeight(Y);

-	int pitch = FreeImage_GetPitch(Y);

-

-	std::vector<float> vY(width * height);

-

-	BYTE *bits = (BYTE*)FreeImage_GetBits(Y);

-	for(y = 0; y < height; y++) {

-		float *pixel = (float*)bits;

-		for(x = 0; x < width; x++) {

-			if(pixel[x] != 0) {

-				vY.push_back(pixel[x]);

-			}

-		}

-		bits += pitch;

-	}

-

-	std::sort(vY.begin(), vY.end());

-	

-	*minLum = vY.at( int(minPrct * vY.size()) );

-	*maxLum = vY.at( int(maxPrct * vY.size()) );

-}

-

-/**

-Clipping function<br>

-Remove any extremely bright and/or extremely dark pixels 

-and normalize between 0 and 1. 

-@param Y Input/Output image

-@param minPrct Minimum percentile

-@param maxPrct Maximum percentile

-*/

-void 

-NormalizeY(FIBITMAP *Y, float minPrct, float maxPrct) {

-	int x, y;

-	float maxLum, minLum;

-

-	if(minPrct > maxPrct) {

-		// swap values

-		float t = minPrct; minPrct = maxPrct; maxPrct = t;

-	}

-	if(minPrct < 0) minPrct = 0;

-	if(maxPrct > 1) maxPrct = 1;

-

-	int width = FreeImage_GetWidth(Y);

-	int height = FreeImage_GetHeight(Y);

-	int pitch = FreeImage_GetPitch(Y);

-

-	// find max & min luminance values

-	if((minPrct > 0) || (maxPrct < 1)) {

-		maxLum = 0, minLum = 0;

-		findMaxMinPercentile(Y, minPrct, &minLum, maxPrct, &maxLum);

-	} else {

-		maxLum = -1e20F, minLum = 1e20F;

-		BYTE *bits = (BYTE*)FreeImage_GetBits(Y);

-		for(y = 0; y < height; y++) {

-			const float *pixel = (float*)bits;

-			for(x = 0; x < width; x++) {

-				const float value = pixel[x];

-				maxLum = (maxLum < value) ? value : maxLum;	// max Luminance in the scene

-				minLum = (minLum < value) ? minLum : value;	// min Luminance in the scene

-			}

-			// next line

-			bits += pitch;

-		}

-	}

-	if(maxLum == minLum) return;

-

-	// normalize to range 0..1 

-	const float divider = maxLum - minLum;

-	BYTE *bits = (BYTE*)FreeImage_GetBits(Y);

-	for(y = 0; y < height; y++) {

-		float *pixel = (float*)bits;

-		for(x = 0; x < width; x++) {

-			pixel[x] = (pixel[x] - minLum) / divider;

-			if(pixel[x] <= 0) pixel[x] = EPSILON;

-			if(pixel[x] > 1) pixel[x] = 1;

-		}

-		// next line

-		bits += pitch;

-	}

-}

+// ==========================================================
+// High Dynamic Range bitmap conversion routines
+//
+// Design and implementation by
+// - Hervé Drolon (drolon@infonie.fr)
+// - Mihail Naydenov (mnaydenov@users.sourceforge.net)
+//
+// This file is part of FreeImage 3
+//
+// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
+// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
+// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
+// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
+// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
+// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
+// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
+// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+// THIS DISCLAIMER.
+//
+// Use at your own risk!
+// ==========================================================
+
+#include "FreeImage.h"
+#include "Utilities.h"
+#include "ToneMapping.h"
+
+// ----------------------------------------------------------
+// Convert RGB to and from Yxy, same as in Reinhard et al. SIGGRAPH 2002
+// References : 
+// [1] Radiance Home Page [Online] http://radsite.lbl.gov/radiance/HOME.html
+// [2] E. Reinhard, M. Stark, P. Shirley, and J. Ferwerda,  
+//     Photographic Tone Reproduction for Digital Images, ACM Transactions on Graphics, 
+//     21(3):267-276, 2002 (Proceedings of SIGGRAPH 2002). 
+// [3] J. Tumblin and H.E. Rushmeier, 
+//     Tone Reproduction for Realistic Images. IEEE Computer Graphics and Applications, 
+//     13(6):42-48, 1993.
+// ----------------------------------------------------------
+
+/**
+nominal CRT primaries 
+*/
+/*
+static const float CIE_x_r = 0.640F;
+static const float CIE_y_r = 0.330F;
+static const float CIE_x_g = 0.290F;
+static const float CIE_y_g = 0.600F;
+static const float CIE_x_b = 0.150F;
+static const float CIE_y_b = 0.060F;
+static const float CIE_x_w = 0.3333F;	// use true white
+static const float CIE_y_w = 0.3333F;
+*/
+/**
+sRGB primaries
+*/
+static const float CIE_x_r = 0.640F;
+static const float CIE_y_r = 0.330F;
+static const float CIE_x_g = 0.300F;
+static const float CIE_y_g = 0.600F;
+static const float CIE_x_b = 0.150F;
+static const float CIE_y_b = 0.060F;
+static const float CIE_x_w = 0.3127F;	// Illuminant D65
+static const float CIE_y_w = 0.3290F;
+
+static const float CIE_D = ( CIE_x_r*(CIE_y_g - CIE_y_b) + CIE_x_g*(CIE_y_b - CIE_y_r) + CIE_x_b*(CIE_y_r - CIE_y_g) );
+static const float CIE_C_rD = ( (1/CIE_y_w) * ( CIE_x_w*(CIE_y_g - CIE_y_b) - CIE_y_w*(CIE_x_g - CIE_x_b) + CIE_x_g*CIE_y_b - CIE_x_b*CIE_y_g) );
+static const float CIE_C_gD = ( (1/CIE_y_w) * ( CIE_x_w*(CIE_y_b - CIE_y_r) - CIE_y_w*(CIE_x_b - CIE_x_r) - CIE_x_r*CIE_y_b + CIE_x_b*CIE_y_r) );
+static const float CIE_C_bD = ( (1/CIE_y_w) * ( CIE_x_w*(CIE_y_r - CIE_y_g) - CIE_y_w*(CIE_x_r - CIE_x_g) + CIE_x_r*CIE_y_g - CIE_x_g*CIE_y_r) );
+
+/**
+RGB to XYZ (no white balance)
+*/
+static const float  RGB2XYZ[3][3] = {
+	{ CIE_x_r*CIE_C_rD / CIE_D, 
+	  CIE_x_g*CIE_C_gD / CIE_D, 
+	  CIE_x_b*CIE_C_bD / CIE_D 
+	},
+	{ CIE_y_r*CIE_C_rD / CIE_D, 
+	  CIE_y_g*CIE_C_gD / CIE_D, 
+	  CIE_y_b*CIE_C_bD / CIE_D 
+	},
+	{ (1 - CIE_x_r-CIE_y_r)*CIE_C_rD / CIE_D,
+	  (1 - CIE_x_g-CIE_y_g)*CIE_C_gD / CIE_D,
+	  (1 - CIE_x_b-CIE_y_b)*CIE_C_bD / CIE_D
+	}
+};
+
+/**
+XYZ to RGB (no white balance)
+*/
+static const float  XYZ2RGB[3][3] = {
+	{(CIE_y_g - CIE_y_b - CIE_x_b*CIE_y_g + CIE_y_b*CIE_x_g) / CIE_C_rD,
+	 (CIE_x_b - CIE_x_g - CIE_x_b*CIE_y_g + CIE_x_g*CIE_y_b) / CIE_C_rD,
+	 (CIE_x_g*CIE_y_b - CIE_x_b*CIE_y_g) / CIE_C_rD
+	},
+	{(CIE_y_b - CIE_y_r - CIE_y_b*CIE_x_r + CIE_y_r*CIE_x_b) / CIE_C_gD,
+	 (CIE_x_r - CIE_x_b - CIE_x_r*CIE_y_b + CIE_x_b*CIE_y_r) / CIE_C_gD,
+	 (CIE_x_b*CIE_y_r - CIE_x_r*CIE_y_b) / CIE_C_gD
+	},
+	{(CIE_y_r - CIE_y_g - CIE_y_r*CIE_x_g + CIE_y_g*CIE_x_r) / CIE_C_bD,
+	 (CIE_x_g - CIE_x_r - CIE_x_g*CIE_y_r + CIE_x_r*CIE_y_g) / CIE_C_bD,
+	 (CIE_x_r*CIE_y_g - CIE_x_g*CIE_y_r) / CIE_C_bD
+	}
+};
+
+/**
+This gives approximately the following matrices : 
+
+static const float RGB2XYZ[3][3] = { 
+	{ 0.41239083F, 0.35758433F, 0.18048081F },
+	{ 0.21263903F, 0.71516865F, 0.072192319F },
+	{ 0.019330820F, 0.11919473F, 0.95053220F }
+};
+static const float XYZ2RGB[3][3] = { 
+	{ 3.2409699F, -1.5373832F, -0.49861079F },
+	{ -0.96924376F, 1.8759676F, 0.041555084F },
+	{ 0.055630036F, -0.20397687F, 1.0569715F }
+};
+*/
+
+// ----------------------------------------------------------
+
+static const float EPSILON = 1e-06F;
+static const float INF = 1e+10F;
+
+/**
+Convert in-place floating point RGB data to Yxy.<br>
+On output, pixel->red == Y, pixel->green == x, pixel->blue == y
+@param dib Input RGBF / Output Yxy image
+@return Returns TRUE if successful, returns FALSE otherwise
+*/
+BOOL 
+ConvertInPlaceRGBFToYxy(FIBITMAP *dib) {
+	float result[3];
+
+	if(FreeImage_GetImageType(dib) != FIT_RGBF)
+		return FALSE;
+
+	const unsigned width  = FreeImage_GetWidth(dib);
+	const unsigned height = FreeImage_GetHeight(dib);
+	const unsigned pitch  = FreeImage_GetPitch(dib);
+	
+	BYTE *bits = (BYTE*)FreeImage_GetBits(dib);
+	for(unsigned y = 0; y < height; y++) {
+		FIRGBF *pixel = (FIRGBF*)bits;
+		for(unsigned x = 0; x < width; x++) {
+			result[0] = result[1] = result[2] = 0;
+			for (int i = 0; i < 3; i++) {
+				result[i] += RGB2XYZ[i][0] * pixel[x].red;
+				result[i] += RGB2XYZ[i][1] * pixel[x].green;
+				result[i] += RGB2XYZ[i][2] * pixel[x].blue;
+			}
+			const float W = result[0] + result[1] + result[2];
+			const float Y = result[1];
+			if(W > 0) { 
+				pixel[x].red   = Y;			    // Y 
+				pixel[x].green = result[0] / W;	// x 
+				pixel[x].blue  = result[1] / W;	// y 	
+			} else {
+				pixel[x].red = pixel[x].green = pixel[x].blue = 0;
+			}
+		}
+		// next line
+		bits += pitch;
+	}
+
+	return TRUE;
+}
+
+/**
+Convert in-place Yxy image to floating point RGB data.<br>
+On input, pixel->red == Y, pixel->green == x, pixel->blue == y
+@param dib Input Yxy / Output RGBF image
+@return Returns TRUE if successful, returns FALSE otherwise
+*/
+BOOL 
+ConvertInPlaceYxyToRGBF(FIBITMAP *dib) {
+	float result[3];
+	float X, Y, Z;
+
+	if(FreeImage_GetImageType(dib) != FIT_RGBF)
+		return FALSE;
+
+	const unsigned width  = FreeImage_GetWidth(dib);
+	const unsigned height = FreeImage_GetHeight(dib);
+	const unsigned pitch  = FreeImage_GetPitch(dib);
+
+	BYTE *bits = (BYTE*)FreeImage_GetBits(dib);
+	for(unsigned y = 0; y < height; y++) {
+		FIRGBF *pixel = (FIRGBF*)bits;
+		for(unsigned x = 0; x < width; x++) {
+			Y = pixel[x].red;	        // Y 
+			result[1] = pixel[x].green;	// x 
+			result[2] = pixel[x].blue;	// y 
+			if ((Y > EPSILON) && (result[1] > EPSILON) && (result[2] > EPSILON)) {
+				X = (result[1] * Y) / result[2];
+				Z = (X / result[1]) - X - Y;
+			} else {
+				X = Z = EPSILON;
+			}
+			pixel[x].red   = X;
+			pixel[x].green = Y;
+			pixel[x].blue  = Z;
+			result[0] = result[1] = result[2] = 0;
+			for (int i = 0; i < 3; i++) {
+				result[i] += XYZ2RGB[i][0] * pixel[x].red;
+				result[i] += XYZ2RGB[i][1] * pixel[x].green;
+				result[i] += XYZ2RGB[i][2] * pixel[x].blue;
+			}
+			pixel[x].red   = result[0];	// R
+			pixel[x].green = result[1];	// G
+			pixel[x].blue  = result[2];	// B
+		}
+		// next line
+		bits += pitch;
+	}
+
+	return TRUE;
+}
+
+/**
+Get the maximum, minimum and average luminance.<br>
+On input, pixel->red == Y, pixel->green == x, pixel->blue == y
+@param Yxy Source Yxy image to analyze
+@param maxLum Maximum luminance
+@param minLum Minimum luminance
+@param worldLum Average luminance (world adaptation luminance)
+@return Returns TRUE if successful, returns FALSE otherwise
+*/
+BOOL 
+LuminanceFromYxy(FIBITMAP *Yxy, float *maxLum, float *minLum, float *worldLum) {
+	if(FreeImage_GetImageType(Yxy) != FIT_RGBF)
+		return FALSE;
+
+	const unsigned width  = FreeImage_GetWidth(Yxy);
+	const unsigned height = FreeImage_GetHeight(Yxy);
+	const unsigned pitch  = FreeImage_GetPitch(Yxy);
+
+	float max_lum = 0, min_lum = 0;
+	double sum = 0;
+
+	BYTE *bits = (BYTE*)FreeImage_GetBits(Yxy);
+	for(unsigned y = 0; y < height; y++) {
+		const FIRGBF *pixel = (FIRGBF*)bits;
+		for(unsigned x = 0; x < width; x++) {
+			const float Y = MAX(0.0F, pixel[x].red);// avoid negative values
+			max_lum = (max_lum < Y) ? Y : max_lum;	// max Luminance in the scene
+			min_lum = (min_lum < Y) ? min_lum : Y;	// min Luminance in the scene
+			sum += log(2.3e-5F + Y);				// contrast constant in Tumblin paper
+		}
+		// next line
+		bits += pitch;
+	}
+	// maximum luminance
+	*maxLum = max_lum;
+	// minimum luminance
+	*minLum = min_lum;
+	// average log luminance
+	double avgLogLum = (sum / (width * height));
+	// world adaptation luminance
+	*worldLum = (float)exp(avgLogLum);
+
+	return TRUE;
+}
+
+/**
+Clamp RGBF image highest values to display white, 
+then convert to 24-bit RGB
+*/
+FIBITMAP* 
+ClampConvertRGBFTo24(FIBITMAP *src) {
+	if(FreeImage_GetImageType(src) != FIT_RGBF)
+		return FALSE;
+
+	const unsigned width  = FreeImage_GetWidth(src);
+	const unsigned height = FreeImage_GetHeight(src);
+
+	FIBITMAP *dst = FreeImage_Allocate(width, height, 24, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
+	if(!dst) return NULL;
+
+	const unsigned src_pitch  = FreeImage_GetPitch(src);
+	const unsigned dst_pitch  = FreeImage_GetPitch(dst);
+
+	BYTE *src_bits = (BYTE*)FreeImage_GetBits(src);
+	BYTE *dst_bits = (BYTE*)FreeImage_GetBits(dst);
+
+	for(unsigned y = 0; y < height; y++) {
+		const FIRGBF *src_pixel = (FIRGBF*)src_bits;
+		BYTE *dst_pixel = (BYTE*)dst_bits;
+		for(unsigned x = 0; x < width; x++) {
+			const float red   = (src_pixel[x].red > 1)   ? 1 : src_pixel[x].red;
+			const float green = (src_pixel[x].green > 1) ? 1 : src_pixel[x].green;
+			const float blue  = (src_pixel[x].blue > 1)  ? 1 : src_pixel[x].blue;
+			
+			dst_pixel[FI_RGBA_RED]   = (BYTE)(255.0F * red   + 0.5F);
+			dst_pixel[FI_RGBA_GREEN] = (BYTE)(255.0F * green + 0.5F);
+			dst_pixel[FI_RGBA_BLUE]  = (BYTE)(255.0F * blue  + 0.5F);
+			dst_pixel += 3;
+		}
+		src_bits += src_pitch;
+		dst_bits += dst_pitch;
+	}
+
+	return dst;
+}
+
+/**
+Extract the luminance channel L from a RGBF image. 
+Luminance is calculated from the sRGB model (RGB2XYZ matrix) 
+using a D65 white point : 
+L = ( 0.2126 * r ) + ( 0.7152 * g ) + ( 0.0722 * b )
+Reference : 
+A Standard Default Color Space for the Internet - sRGB. 
+[online] http://www.w3.org/Graphics/Color/sRGB
+*/
+FIBITMAP*  
+ConvertRGBFToY(FIBITMAP *src) {
+	if(FreeImage_GetImageType(src) != FIT_RGBF)
+		return FALSE;
+
+	const unsigned width  = FreeImage_GetWidth(src);
+	const unsigned height = FreeImage_GetHeight(src);
+
+	FIBITMAP *dst = FreeImage_AllocateT(FIT_FLOAT, width, height);
+	if(!dst) return NULL;
+
+	const unsigned src_pitch  = FreeImage_GetPitch(src);
+	const unsigned dst_pitch  = FreeImage_GetPitch(dst);
+
+	
+	BYTE *src_bits = (BYTE*)FreeImage_GetBits(src);
+	BYTE *dst_bits = (BYTE*)FreeImage_GetBits(dst);
+
+	for(unsigned y = 0; y < height; y++) {
+		const FIRGBF *src_pixel = (FIRGBF*)src_bits;
+		float  *dst_pixel = (float*)dst_bits;
+		for(unsigned x = 0; x < width; x++) {
+			const float L = LUMA_REC709(src_pixel[x].red, src_pixel[x].green, src_pixel[x].blue);
+			dst_pixel[x] = (L > 0) ? L : 0;
+		}
+		// next line
+		src_bits += src_pitch;
+		dst_bits += dst_pitch;
+	}
+
+	return dst;
+}
+
+/**
+Get the maximum, minimum, average luminance and log average luminance from a Y image
+@param dib Source Y image to analyze
+@param maxLum Maximum luminance
+@param minLum Minimum luminance
+@param Lav Average luminance
+@param Llav Log average luminance (also known as 'world adaptation luminance')
+@return Returns TRUE if successful, returns FALSE otherwise
+@see ConvertRGBFToY, FreeImage_TmoReinhard05Ex
+*/
+BOOL 
+LuminanceFromY(FIBITMAP *dib, float *maxLum, float *minLum, float *Lav, float *Llav) {
+	if(FreeImage_GetImageType(dib) != FIT_FLOAT)
+		return FALSE;
+
+	unsigned width  = FreeImage_GetWidth(dib);
+	unsigned height = FreeImage_GetHeight(dib);
+	unsigned pitch  = FreeImage_GetPitch(dib);
+
+	float max_lum = -1e20F, min_lum = 1e20F;
+	double sumLum = 0, sumLogLum = 0;
+
+	BYTE *bits = (BYTE*)FreeImage_GetBits(dib);
+	for(unsigned y = 0; y < height; y++) {
+		const float *pixel = (float*)bits;
+		for(unsigned x = 0; x < width; x++) {
+			const float Y = pixel[x];
+			max_lum = (max_lum < Y) ? Y : max_lum;				// max Luminance in the scene
+			min_lum = ((Y > 0) && (min_lum < Y)) ? min_lum : Y;	// min Luminance in the scene
+			sumLum += Y;										// average luminance
+			sumLogLum += log(2.3e-5F + Y);						// contrast constant in Tumblin paper
+		}
+		// next line
+		bits += pitch;
+	}
+
+	// maximum luminance
+	*maxLum = max_lum;
+	// minimum luminance
+	*minLum = min_lum;
+	// average luminance
+	*Lav = (float)(sumLum / (width * height));
+	// average log luminance, a.k.a. world adaptation luminance
+	*Llav = (float)exp(sumLogLum / (width * height));
+
+	return TRUE;
+}
+// --------------------------------------------------------------------------
+
+static void findMaxMinPercentile(FIBITMAP *Y, float minPrct, float *minLum, float maxPrct, float *maxLum) {
+	int x, y;
+	int width = FreeImage_GetWidth(Y);
+	int height = FreeImage_GetHeight(Y);
+	int pitch = FreeImage_GetPitch(Y);
+
+	std::vector<float> vY(width * height);
+
+	BYTE *bits = (BYTE*)FreeImage_GetBits(Y);
+	for(y = 0; y < height; y++) {
+		float *pixel = (float*)bits;
+		for(x = 0; x < width; x++) {
+			if(pixel[x] != 0) {
+				vY.push_back(pixel[x]);
+			}
+		}
+		bits += pitch;
+	}
+
+	std::sort(vY.begin(), vY.end());
+	
+	*minLum = vY.at( int(minPrct * vY.size()) );
+	*maxLum = vY.at( int(maxPrct * vY.size()) );
+}
+
+/**
+Clipping function<br>
+Remove any extremely bright and/or extremely dark pixels 
+and normalize between 0 and 1. 
+@param Y Input/Output image
+@param minPrct Minimum percentile
+@param maxPrct Maximum percentile
+*/
+void 
+NormalizeY(FIBITMAP *Y, float minPrct, float maxPrct) {
+	int x, y;
+	float maxLum, minLum;
+
+	if(minPrct > maxPrct) {
+		// swap values
+		float t = minPrct; minPrct = maxPrct; maxPrct = t;
+	}
+	if(minPrct < 0) minPrct = 0;
+	if(maxPrct > 1) maxPrct = 1;
+
+	int width = FreeImage_GetWidth(Y);
+	int height = FreeImage_GetHeight(Y);
+	int pitch = FreeImage_GetPitch(Y);
+
+	// find max & min luminance values
+	if((minPrct > 0) || (maxPrct < 1)) {
+		maxLum = 0, minLum = 0;
+		findMaxMinPercentile(Y, minPrct, &minLum, maxPrct, &maxLum);
+	} else {
+		maxLum = -1e20F, minLum = 1e20F;
+		BYTE *bits = (BYTE*)FreeImage_GetBits(Y);
+		for(y = 0; y < height; y++) {
+			const float *pixel = (float*)bits;
+			for(x = 0; x < width; x++) {
+				const float value = pixel[x];
+				maxLum = (maxLum < value) ? value : maxLum;	// max Luminance in the scene
+				minLum = (minLum < value) ? minLum : value;	// min Luminance in the scene
+			}
+			// next line
+			bits += pitch;
+		}
+	}
+	if(maxLum == minLum) return;
+
+	// normalize to range 0..1 
+	const float divider = maxLum - minLum;
+	BYTE *bits = (BYTE*)FreeImage_GetBits(Y);
+	for(y = 0; y < height; y++) {
+		float *pixel = (float*)bits;
+		for(x = 0; x < width; x++) {
+			pixel[x] = (pixel[x] - minLum) / divider;
+			if(pixel[x] <= 0) pixel[x] = EPSILON;
+			if(pixel[x] > 1) pixel[x] = 1;
+		}
+		// next line
+		bits += pitch;
+	}
+}