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choelzl
2022-04-07 18:46:57 +02:00
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commit 15e7120d6d
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cs440-acg/ext/openexr/OpenEXR/IlmImf/ImfDeepCompositing.h Normal file
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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012, Weta Digital Ltd
//
// 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 Weta Digital nor the names of
// its contributors 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.
//
///////////////////////////////////////////////////////////////////////////
#ifndef INCLUDED_IMF_DEEPCOMPOSITING_H
#define INCLUDED_IMF_DEEPCOMPOSITING_H
//-----------------------------------------------------------------------------
//
// Class to sort and composite deep samples into a frame buffer
// You may derive from this class to change the way that CompositeDeepScanLine
// and CompositeDeepTile combine samples together - pass an instance of your derived
// class to the compositing engine
//
//-----------------------------------------------------------------------------
#include "ImfForward.h"
#include "ImfNamespace.h"
#include "ImfExport.h"
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
class IMF_EXPORT DeepCompositing
{
public:
DeepCompositing();
virtual ~DeepCompositing();
//////////////////////////////////////////////
///
/// composite together the given channels
///
/// @param outputs - return array of pixel values -
/// @param inputs - arrays of input sample
/// @param channel_names - array of channel names for corresponding channels
/// @param num_channels - number of active channels (3 or greater)
/// @param num_samples - number of values in all input arrays
/// @param sources - number of different sources
///
/// each array input has num_channels entries: outputs[n] should be the composited
/// values in array inputs[n], whose name will be given by channel_names[n]
///
/// The channel ordering shall be as follows:
/// Position Channel
/// 0 Z
/// 1 ZBack (if no ZBack, then inputs[1]==inputs[0] and channel_names[1]==channel_names[0])
/// 2 A (alpha channel)
/// 3-n other channels - only channels in the frame buffer will appear here
///
/// since a Z and Alpha channel is required, and channel[1] is ZBack or another copy of Z
/// there will always be 3 or more channels.
///
/// The default implementation calls sort() if and only if more than one source is active,
/// composites all samples together using the Over operator from front to back,
/// stopping as soon as a sample with alpha=1 is found
/// It also blanks all outputs if num_samples==0
///
/// note - multiple threads may call composite_pixel simultaneously for different pixels
///
///
//////////////////////////////////////////////
virtual void composite_pixel(float outputs[],
const float * inputs[],
const char * channel_names[],
int num_channels,
int num_samples,
int sources
);
////////////////////////////////////////////////////////////////
///
/// find the depth order for samples with given channel values
/// does not sort the values in-place. Instead it populates
/// array 'order' with the desired sorting order
///
/// the default operation sorts samples from front to back according to their Z channel
///
/// @param order - required output order. order[n] shall be the nth closest sample
/// @param inputs - arrays of input samples, one array per channel_name
/// @param channel_names - array of channel names for corresponding channels
/// @param num_channels - number of channels (3 or greater)
/// @param num_samples - number of samples in each array
/// @param sources - number of different sources the data arises from
///
/// the channel layout is identical to composite_pixel()
///
///////////////////////////////////////////////////////////////
virtual void sort(int order[],
const float * inputs[],
const char * channel_names[],
int num_channels,
int num_samples,
int sources);
};
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
#endif