Gecko [ nrupathungauniversityblr.ac.in ]

Name	Size	Permission
Iex.h	2.34 KB	-rw-r--r--
IexBaseExc.h	9.06 KB	-rw-r--r--
IexErrnoExc.h	7.37 KB	-rw-r--r--
IexExport.h	2.08 KB	-rw-r--r--
IexForward.h	5.1 KB	-rw-r--r--
IexMacros.h	5.63 KB	-rw-r--r--
IexMathExc.h	2.41 KB	-rw-r--r--
IexMathFloatExc.h	4.58 KB	-rw-r--r--
IexMathFpu.h	3.3 KB	-rw-r--r--
IexMathIeeeExc.h	2.3 KB	-rw-r--r--
IexNamespace.h	4.3 KB	-rw-r--r--
IexThrowErrnoExc.h	3.4 KB	-rw-r--r--
IlmBaseConfig.h	1.64 KB	-rw-r--r--
IlmThread.h	4.78 KB	-rw-r--r--
IlmThreadExport.h	2.15 KB	-rw-r--r--
IlmThreadForward.h	2.08 KB	-rw-r--r--
IlmThreadMutex.h	4.32 KB	-rw-r--r--
IlmThreadNamespace.h	4.54 KB	-rw-r--r--
IlmThreadPool.h	5.21 KB	-rw-r--r--
IlmThreadSemaphore.h	3.38 KB	-rw-r--r--
ImathBox.h	16.62 KB	-rw-r--r--
ImathBoxAlgo.h	22.35 KB	-rw-r--r--
ImathColor.h	14.87 KB	-rw-r--r--
ImathColorAlgo.h	7.08 KB	-rw-r--r--
ImathEuler.h	22.88 KB	-rw-r--r--
ImathExc.h	2.82 KB	-rw-r--r--
ImathExport.h	2.13 KB	-rw-r--r--
ImathForward.h	2.68 KB	-rw-r--r--
ImathFrame.h	6.6 KB	-rw-r--r--
ImathFrustum.h	22.26 KB	-rw-r--r--
ImathFrustumTest.h	14.77 KB	-rw-r--r--
ImathFun.h	5.99 KB	-rw-r--r--
ImathGL.h	4.52 KB	-rw-r--r--
ImathGLU.h	2.17 KB	-rw-r--r--
ImathHalfLimits.h	2.47 KB	-rw-r--r--
ImathInt64.h	2.4 KB	-rw-r--r--
ImathInterval.h	5.34 KB	-rw-r--r--
ImathLimits.h	7.76 KB	-rw-r--r--
ImathLine.h	4.74 KB	-rw-r--r--
ImathLineAlgo.h	7.68 KB	-rw-r--r--
ImathMath.h	7.17 KB	-rw-r--r--
ImathMatrix.h	82.42 KB	-rw-r--r--
ImathMatrixAlgo.h	37.97 KB	-rw-r--r--
ImathNamespace.h	4.38 KB	-rw-r--r--
ImathPlane.h	6.75 KB	-rw-r--r--
ImathPlatform.h	3.23 KB	-rw-r--r--
ImathQuat.h	20.94 KB	-rw-r--r--
ImathRandom.h	9.84 KB	-rw-r--r--
ImathRoots.h	5.62 KB	-rw-r--r--
ImathShear.h	13.85 KB	-rw-r--r--
ImathSphere.h	4.68 KB	-rw-r--r--
ImathVec.h	44.17 KB	-rw-r--r--
ImathVecAlgo.h	4.64 KB	-rw-r--r--
ImfAcesFile.h	10.27 KB	-rw-r--r--
ImfArray.h	6.79 KB	-rw-r--r--
ImfAttribute.h	10.36 KB	-rw-r--r--
ImfB44Compressor.h	3.67 KB	-rw-r--r--
ImfBoxAttribute.h	3.1 KB	-rw-r--r--
ImfCRgbaFile.h	12.5 KB	-rw-r--r--
ImfChannelList.h	11.2 KB	-rw-r--r--
ImfChannelListAttribute.h	2.69 KB	-rw-r--r--
ImfChromaticities.h	4.45 KB	-rw-r--r--
ImfChromaticitiesAttribute.h	2.74 KB	-rw-r--r--
ImfCompositeDeepScanLine.h	5.38 KB	-rw-r--r--
ImfCompression.h	3.25 KB	-rw-r--r--
ImfCompressionAttribute.h	2.71 KB	-rw-r--r--
ImfConvert.h	3.39 KB	-rw-r--r--
ImfDeepCompositing.h	5.97 KB	-rw-r--r--
ImfDeepFrameBuffer.h	8.79 KB	-rw-r--r--
ImfDeepImageState.h	3.67 KB	-rw-r--r--
ImfDeepImageStateAttribute.h	2.64 KB	-rw-r--r--
ImfDeepScanLineInputFile.h	11.01 KB	-rw-r--r--
ImfDeepScanLineInputPart.h	6.9 KB	-rw-r--r--
ImfDeepScanLineOutputFile.h	9.37 KB	-rw-r--r--
ImfDeepScanLineOutputPart.h	6.41 KB	-rw-r--r--
ImfDeepTiledInputFile.h	16.08 KB	-rw-r--r--
ImfDeepTiledInputPart.h	13.27 KB	-rw-r--r--
ImfDeepTiledOutputFile.h	18.1 KB	-rw-r--r--
ImfDeepTiledOutputPart.h	14.83 KB	-rw-r--r--
ImfDoubleAttribute.h	2.29 KB	-rw-r--r--
ImfEnvmap.h	11.29 KB	-rw-r--r--
ImfEnvmapAttribute.h	2.67 KB	-rw-r--r--
ImfExport.h	2.11 KB	-rw-r--r--
ImfFloatAttribute.h	2.26 KB	-rw-r--r--
ImfForward.h	3.48 KB	-rw-r--r--
ImfFrameBuffer.h	11.18 KB	-rw-r--r--
ImfFramesPerSecond.h	3.79 KB	-rw-r--r--
ImfGenericInputFile.h	2.26 KB	-rw-r--r--
ImfGenericOutputFile.h	2.44 KB	-rw-r--r--
ImfHeader.h	19.27 KB	-rw-r--r--
ImfHuf.h	2.86 KB	-rw-r--r--
ImfIO.h	7.45 KB	-rw-r--r--
ImfInputFile.h	8.28 KB	-rw-r--r--
ImfInputPart.h	3.52 KB	-rw-r--r--
ImfInt64.h	2.24 KB	-rw-r--r--
ImfIntAttribute.h	2.27 KB	-rw-r--r--
ImfKeyCode.h	4.9 KB	-rw-r--r--
ImfKeyCodeAttribute.h	2.65 KB	-rw-r--r--
ImfLineOrder.h	2.42 KB	-rw-r--r--
ImfLineOrderAttribute.h	2.67 KB	-rw-r--r--
ImfLut.h	5.12 KB	-rw-r--r--
ImfMatrixAttribute.h	3.65 KB	-rw-r--r--
ImfMisc.h	16.33 KB	-rw-r--r--
ImfMultiPartInputFile.h	3.94 KB	-rw-r--r--
ImfMultiPartOutputFile.h	4.29 KB	-rw-r--r--
ImfMultiView.h	6.29 KB	-rw-r--r--
ImfName.h	3.52 KB	-rw-r--r--
ImfNamespace.h	4.46 KB	-rw-r--r--
ImfOpaqueAttribute.h	3.55 KB	-rw-r--r--
ImfOutputFile.h	9.66 KB	-rw-r--r--
ImfOutputPart.h	3.04 KB	-rw-r--r--
ImfPartHelper.h	7.66 KB	-rw-r--r--
ImfPartType.h	2.38 KB	-rw-r--r--
ImfPixelType.h	2.34 KB	-rw-r--r--
ImfPreviewImage.h	4.65 KB	-rw-r--r--
ImfPreviewImageAttribute.h	2.68 KB	-rw-r--r--
ImfRational.h	3.17 KB	-rw-r--r--
ImfRationalAttribute.h	2.63 KB	-rw-r--r--
ImfRgba.h	3.08 KB	-rw-r--r--
ImfRgbaFile.h	13.09 KB	-rw-r--r--
ImfRgbaYca.h	8.21 KB	-rw-r--r--
ImfStandardAttributes.h	13.26 KB	-rw-r--r--
ImfStringAttribute.h	2.58 KB	-rw-r--r--
ImfStringVectorAttribute.h	2.7 KB	-rw-r--r--
ImfTestFile.h	3.55 KB	-rw-r--r--
ImfThreading.h	4.24 KB	-rw-r--r--
ImfTileDescription.h	3.13 KB	-rw-r--r--
ImfTileDescriptionAttribute.h	2.7 KB	-rw-r--r--
ImfTiledInputFile.h	13.82 KB	-rw-r--r--
ImfTiledInputPart.h	4.55 KB	-rw-r--r--
ImfTiledOutputFile.h	17.83 KB	-rw-r--r--
ImfTiledOutputPart.h	4.75 KB	-rw-r--r--
ImfTiledRgbaFile.h	15.89 KB	-rw-r--r--
ImfTimeCode.h	7 KB	-rw-r--r--
ImfTimeCodeAttribute.h	2.64 KB	-rw-r--r--
ImfVecAttribute.h	4.45 KB	-rw-r--r--
ImfVersion.h	4.64 KB	-rw-r--r--
ImfWav.h	2.73 KB	-rw-r--r--
ImfXdr.h	18.74 KB	-rw-r--r--
OpenEXRConfig.h	1.8 KB	-rw-r--r--
half.h	17.22 KB	-rw-r--r--
halfExport.h	757 B	-rw-r--r--
halfFunction.h	4.83 KB	-rw-r--r--
halfLimits.h	3.73 KB	-rw-r--r--

Code Editor : ImfRgbaYca.h

#ifndef INCLUDED_IMF_RGBA_YCA_H
#define INCLUDED_IMF_RGBA_YCA_H

//////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucasfilm
// Entertainment Company Ltd.  Portions contributed and copyright held by
// others as indicated.  All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above
//       copyright notice, this list of conditions and the following
//       disclaimer.
//
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided with
//       the distribution.
//
//     * Neither the name of Industrial Light & Magic nor the names of
//       any other contributors to this software may be used to endorse or
//       promote products derived from this software without specific prior
//       written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------------
//
//	Conversion between RGBA (red, green, blue alpha)
//	and YCA (luminance, subsampled chroma, alpha) data:
//
//	Luminance, Y, is computed as a weighted sum of R, G, and B:
//
//		Y = yw.x * R + yw.y * G + yw.z * B
//
//	Function computeYw() computes a set of RGB-to-Y weights, yw,
//	from a set of primary and white point chromaticities.
//
//	Chroma, C, consists of two components, RY and BY:
//
//		RY = (R - Y) / Y
//		BY = (B - Y) / Y
//
//	For efficiency, the x and y subsampling rates for chroma are
//	hardwired to 2, and the chroma subsampling and reconstruction
//	filters are fixed 27-pixel wide windowed sinc functions.
//
//	Starting with an image that has RGBA data for all pixels,
//
//		RGBA RGBA RGBA RGBA ... RGBA RGBA
//		RGBA RGBA RGBA RGBA ... RGBA RGBA
//		RGBA RGBA RGBA RGBA ... RGBA RGBA
//		RGBA RGBA RGBA RGBA ... RGBA RGBA
//		...
//		RGBA RGBA RGBA RGBA ... RGBA RGBA
//		RGBA RGBA RGBA RGBA ... RGBA RGBA
//
//	function RGBAtoYCA() converts the pixels to YCA format:
//
//		YCA  YCA  YCA  YCA  ... YCA  YCA
//		YCA  YCA  YCA  YCA  ... YCA  YCA
//		YCA  YCA  YCA  YCA  ... YCA  YCA
//		YCA  YCA  YCA  YCA  ... YCA  YCA
//		...
//		YCA  YCA  YCA  YCA  ... YCA  YCA
//		YCA  YCA  YCA  YCA  ... YCA  YCA
//
//	Next, decimateChomaHoriz() eliminates the chroma values from
//	the odd-numbered pixels in every scan line:
//
//		YCA  YA   YCA  YA   ... YCA  YA  
//		YCA  YA   YCA  YA   ... YCA  YA  
//		YCA  YA   YCA  YA   ... YCA  YA  
//		YCA  YA   YCA  YA   ... YCA  YA  
//		...
//		YCA  YA   YCA  YA   ... YCA  YA  
//		YCA  YA   YCA  YA   ... YCA  YA  
//
//	decimateChromaVert() eliminates all chroma values from the
//	odd-numbered scan lines:
//
//		YCA  YA   YCA  YA   ... YCA  YA  
//		YA   YA   YA   YA   ... YA   YA  
//		YCA  YA   YCA  YA   ... YCA  YA  
//		YA   YA   YA   YA   ... YA   YA  
//		...
//		YCA  YA   YCA  YA   ... YCA  YA  
//		YA   YA   YA   YA   ... YA   YA  
//
//	Finally, roundYCA() reduces the precision of the luminance
//	and chroma values so that the pixel data shrink more when
//	they are saved in a compressed file.
//
//	The output of roundYCA() can be converted back to a set
//	of RGBA pixel data that is visually very similar to the
//	original RGBA image, by calling reconstructChromaHoriz(),
//	reconstructChromaVert(), YCAtoRGBA(), and finally
//	fixSaturation().
//
//-----------------------------------------------------------------------------

#include "ImfRgba.h"
#include "ImfChromaticities.h"
#include "ImfNamespace.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

namespace RgbaYca {

//
// Width of the chroma subsampling and reconstruction filters
//

static const int N = 27;
static const int N2 = N / 2;

//
// Convert a set of primary chromaticities into a set of weighting
// factors for computing a pixels's luminance, Y, from R, G and B
//
 
IMF_EXPORT
IMATH_NAMESPACE::V3f computeYw (const Chromaticities &cr);

//
// Convert an array of n RGBA pixels, rgbaIn, to YCA (luminance/chroma/alpha):
//
//	ycaOut[i].g = Y (rgbaIn[i]);
//	ycaOut[i].r = RY (rgbaIn[i]);
//	ycaOut[i].b = BY (rgbaIn[i]);
//	ycaOut[i].a = aIsValid? rgbaIn[i].a: 1
//
// yw is a set of RGB-to-Y weighting factors, as computed by computeYw().
//

IMF_EXPORT
void RGBAtoYCA (const IMATH_NAMESPACE::V3f &yw,
		int n,
	        bool aIsValid,
		const Rgba rgbaIn[/*n*/],
		Rgba ycaOut[/*n*/]);

//
// Perform horizontal low-pass filtering and subsampling of
// the chroma channels of an array of n pixels.  In order
// to avoid indexing off the ends of the input array during
// low-pass filtering, ycaIn must have N2 extra pixels at
// both ends.  Before calling decimateChromaHoriz(), the extra
// pixels should be filled with copies of the first and last
// "real" input pixel.
//

IMF_EXPORT
void decimateChromaHoriz (int n,
			  const Rgba ycaIn[/*n+N-1*/],
			  Rgba ycaOut[/*n*/]);

//
// Perform vertical chroma channel low-pass filtering and subsampling.
// N scan lines of input pixels are combined into a single scan line
// of output pixels.
//

IMF_EXPORT
void decimateChromaVert (int n,
			 const Rgba * const ycaIn[N],
			 Rgba ycaOut[/*n*/]);

//
// Round the luminance and chroma channels of an array of YCA
// pixels that has already been filtered and subsampled.
// The signifcands of the pixels' luminance and chroma values
// are rounded to roundY and roundC bits respectively.
//

IMF_EXPORT
void roundYCA (int n,
	       unsigned int roundY,
	       unsigned int roundC,
	       const Rgba ycaIn[/*n*/],
	       Rgba ycaOut[/*n*/]);

//
// For a scan line that has valid chroma data only for every other pixel,
// reconstruct the missing chroma values.
//

IMF_EXPORT
void reconstructChromaHoriz (int n,
			     const Rgba ycaIn[/*n+N-1*/],
			     Rgba ycaOut[/*n*/]);

//
// For a scan line that has only luminance and no valid chroma data,
// reconstruct chroma from the surronding N scan lines.
//

IMF_EXPORT
void reconstructChromaVert (int n,
			    const Rgba * const ycaIn[N],
			    Rgba ycaOut[/*n*/]);
			 
//
// Convert an array of n YCA (luminance/chroma/alpha) pixels to RGBA.
// This function is the inverse of RGBAtoYCA().
// yw is a set of RGB-to-Y weighting factors, as computed by computeYw().
//

IMF_EXPORT
void YCAtoRGBA (const IMATH_NAMESPACE::V3f &yw,
		int n,
		const Rgba ycaIn[/*n*/],
		Rgba rgbaOut[/*n*/]);
			 
//
// Eliminate super-saturated pixels:
//
// Converting an image from RGBA to YCA, low-pass filtering chroma,
// and converting the result back to RGBA can produce pixels with
// super-saturated colors, where one or two of the RGB components
// become zero or negative.  (The low-pass and reconstruction filters
// introduce some amount of ringing into the chroma components.
// This can lead to negative RGB values near high-contrast edges.)
//
// The fixSaturation() function finds super-saturated pixels and
// corrects them by desaturating their colors while maintaining
// their luminance.  fixSaturation() takes three adjacent input
// scan lines, rgbaIn[0], rgbaIn[1], rgbaIn[2], adjusts the
// saturation of rgbaIn[1], and stores the result in rgbaOut.
//

IMF_EXPORT
void fixSaturation (const IMATH_NAMESPACE::V3f &yw,
		    int n,
		    const Rgba * const rgbaIn[3],
		    Rgba rgbaOut[/*n*/]);

} // namespace RgbaYca
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif

${this.title}

Code Editor : ImfRgbaYca.h