124 lines
4.4 KiB
C
124 lines
4.4 KiB
C
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#ifndef INCLUDED_APPLY_CTL_H
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#define INCLUDED_APPLY_CTL_H
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//////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2005, Industrial Light & Magic, a division of Lucasfilm
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// Entertainment Company Ltd. Portions contributed and copyright held by
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// others as indicated. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above
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// copyright notice, this list of conditions and the following
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// disclaimer.
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//
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided with
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// the distribution.
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//
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// * Neither the name of Industrial Light & Magic nor the names of
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// any other contributors to this software may be used to endorse or
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// promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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//////////////////////////////////////////////////////////////////////////////
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//----------------------------------------------------------------------------
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//
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// Apply CTL transforms
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//
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//----------------------------------------------------------------------------
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#include "namespaceAlias.h"
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#include <ImfRgba.h>
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#include <ImfArray.h>
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#include <ImfHeader.h>
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#include <vector>
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#include <cstdlib>
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//
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// Apply a series of CTL transforms to the raw pixel data from an image file
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// in order to generate pixel data that can be displayed on the screen.
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//
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// transformNames A list of the names of the CTL transforms that will
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// be applied to raw pixels. If this list is empty,
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// applyCtl() looks for a rendering transform and a
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// display transform:
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//
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// If inHeader contains a string attribute called
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// "renderingTransform" then the value of this attribute
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// is the name of the rendering transform.
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// If inHeader contains no such attribute, then the
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// name of the rendering transform is "transform_RRT".
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//
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// If the environment variable CTL_DISPLAY_TRANSFORM
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// is set, the value of the environment variable is
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// the name of the display transform.
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// If the environment variable is not set, then the name
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// of the display transform is "transform_display_video".
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//
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// inHeader The header of the image file.
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//
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// inPixels Raw pixels from the image file.
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//
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// w, h Width and height of the inPixels and outPixels
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// arrays. (The caller must set the size of the
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// arrays to w*h, before calling applyCtl().)
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//
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// outPixels Output -- pixels for display on the screen.
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// The data in outPixels represent relative
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// luminance values; an R, G or B value of 1.0
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// represents the maximum red, green or blue
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// luminance that the display can achieve.
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//
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void applyCtl (std::vector<std::string> transformNames,
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IMF::Header inHeader,
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const IMF::Array<IMF::Rgba> &inPixels,
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int w,
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int h,
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IMF::Array<IMF::Rgba> &outPixels);
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//
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// If the chromaticities of the RGB pixel loaded from a file
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// are not the same as the chromaticities of the display,
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// then transform the pixels from the RGB coordinate system
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// of the file to the RGB coordinate system of the display.
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//
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void adjustChromaticities (const IMF::Header &header,
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const IMF::Array<IMF::Rgba> &inPixels,
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int w,
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int h,
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IMF::Array<IMF::Rgba> &outPixels);
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//
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// Get the gamma factor that must be used in order to convert luminance
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// values output by applyCtl() into display frame buffer values.
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//
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float displayVideoGamma ();
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#endif
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