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cs440-acg/ext/openexr/OpenEXR_Viewers/exrdisplay/applyCtl.h

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+#ifndef INCLUDED_APPLY_CTL_H
+#define INCLUDED_APPLY_CTL_H
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2005, 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.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+//----------------------------------------------------------------------------
+//
+//	Apply CTL transforms
+//
+//----------------------------------------------------------------------------
+#include "namespaceAlias.h"
+
+#include <ImfRgba.h>
+#include <ImfArray.h>
+#include <ImfHeader.h>
+
+
+#include <vector>
+#include <cstdlib>
+
+//
+// Apply a series of CTL transforms to the raw pixel data from an image file
+// in order to generate pixel data that can be displayed on the screen.
+//
+//	transformNames	A list of the names of the CTL transforms that will
+//			be applied to raw pixels.  If this list is empty,
+//			applyCtl() looks for a rendering transform and a
+//			display transform:
+//
+//			If inHeader contains a string attribute called
+//			"renderingTransform" then the value of this attribute
+//			is the name of the rendering transform.
+//			If inHeader contains no such attribute, then the
+//			name of the rendering transform is "transform_RRT".
+//
+//			If the environment variable CTL_DISPLAY_TRANSFORM
+//			is set, the value of the environment variable is
+//			the name of the display transform.
+//			If the environment variable is not set, then the name
+//			of the display transform is "transform_display_video".
+//
+//	inHeader	The header of the image file.
+//
+//	inPixels	Raw pixels from the image file.
+//
+//	w, h		Width and height of the inPixels and outPixels
+//			arrays.  (The caller must set the size of the
+//			arrays to w*h, before calling applyCtl().)
+//
+//	outPixels	Output -- pixels for display on the screen.
+//			The data in outPixels represent relative
+//			luminance values; an R, G or B value of 1.0
+//			represents the maximum red, green or blue
+//			luminance that the display can achieve.
+//			
+
+void	applyCtl (std::vector<std::string> transformNames,
+		  IMF::Header inHeader,
+		  const IMF::Array<IMF::Rgba> &inPixels,
+		  int w,
+		  int h,
+		  IMF::Array<IMF::Rgba> &outPixels);
+
+
+//
+// If the chromaticities of the RGB pixel loaded from a file
+// are not the same as the chromaticities of the display,
+// then transform the pixels from the RGB coordinate system
+// of the file to the RGB coordinate system of the display.
+//
+
+void	adjustChromaticities (const IMF::Header &header,
+			      const IMF::Array<IMF::Rgba> &inPixels,
+			      int w,
+			      int h,
+			      IMF::Array<IMF::Rgba> &outPixels);
+
+
+//
+// Get the gamma factor that must be used in order to convert luminance
+// values output by applyCtl() into display frame buffer values.
+//
+
+float	displayVideoGamma ();
+
+
+#endif