mirror of
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115 lines
4.6 KiB
C++
115 lines
4.6 KiB
C++
/* FasTC
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* Copyright (c) 2012 University of North Carolina at Chapel Hill. All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and its documentation for educational,
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* research, and non-profit purposes, without fee, and without a written agreement is hereby granted,
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* provided that the above copyright notice, this paragraph, and the following four paragraphs appear
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* in all copies.
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*
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* Permission to incorporate this software into commercial products may be obtained by contacting the
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* authors or the Office of Technology Development at the University of North Carolina at Chapel Hill <otd@unc.edu>.
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*
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* This software program and documentation are copyrighted by the University of North Carolina at Chapel Hill.
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* The software program and documentation are supplied "as is," without any accompanying services from the
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* University of North Carolina at Chapel Hill or the authors. The University of North Carolina at Chapel Hill
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* and the authors do not warrant that the operation of the program will be uninterrupted or error-free. The
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* end-user understands that the program was developed for research purposes and is advised not to rely
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* exclusively on the program for any reason.
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*
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* IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE AUTHORS BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE
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* USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE
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* AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND THE AUTHORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY
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* STATUTORY WARRANTY OF NON-INFRINGEMENT. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY
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* OF NORTH CAROLINA AT CHAPEL HILL AND THE AUTHORS HAVE NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
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* ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Please send all BUG REPORTS to <pavel@cs.unc.edu>.
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*
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* The authors may be contacted via:
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*
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* Pavel Krajcevski
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* Dept of Computer Science
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* 201 S Columbia St
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* Frederick P. Brooks, Jr. Computer Science Bldg
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* Chapel Hill, NC 27599-3175
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* USA
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*
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* <http://gamma.cs.unc.edu/FasTC/>
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*/
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#ifndef _TEX_COMP_H_
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#define _TEX_COMP_H_
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#include "CompressedImage.h"
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#include "CompressionJob.h"
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#include <iosfwd>
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#include "ImageFwd.h"
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// Forward declarations
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class ImageFile;
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struct SCompressionSettings {
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SCompressionSettings(); // defaults
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// The compression format for the image.
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ECompressionFormat format;
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// The flag that requests us to use SIMD, if it is available
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bool bUseSIMD;
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// The number of threads to spawn in order to process the data
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int iNumThreads;
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// Some compression formats take a measurement of quality when
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// compressing an image. If the format supports it, this value
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// will be used for quality purposes.
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int iQuality;
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// The number of compressions to perform. The program will compress
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// the image this many times, and then take the average of the timing.
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int iNumCompressions;
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// This setting measures the number of blocks that a thread
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// will process at any given time. If this value is zero,
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// which is the default, the work will be divided by the
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// number of threads, and each thread will do it's job and
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// exit.
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int iJobSize;
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// This flags instructs the compression routine to be launched in succession
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// with many threads at once. Atomic expressions based on the availability
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// in the platform and compiler will provide synchronization.
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bool bUseAtomics;
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// This is the output stream with which we should output the logs for the
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// compression functions.
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std::ostream *logStream;
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};
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template<typename PixelType>
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extern CompressedImage *CompressImage(FasTC::Image<PixelType> *img, const SCompressionSettings &settings);
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extern bool CompressImageData(
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const unsigned char *data,
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const unsigned int width,
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const unsigned int height,
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unsigned char *cmpData,
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const unsigned int cmpDataSz,
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const SCompressionSettings &settings
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);
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// This function computes the Peak Signal to Noise Ratio between a
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// compressed image and a raw image.
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extern double ComputePSNR(const CompressedImage &ci, const ImageFile &file);
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// This is a multi-platform yield function that preempts the current thread
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// based on the threading library that we're using.
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extern void YieldThread();
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#endif //_TEX_COMP_H_
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