mirror of
https://github.com/yuzu-emu/FasTC
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110 lines
4.3 KiB
C++
110 lines
4.3 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 _COMPRESSED_IMAGE_H_
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#define _COMPRESSED_IMAGE_H_
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#include "TexCompTypes.h"
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enum ECompressionFormat {
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eCompressionFormat_DXT1,
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eCompressionFormat_DXT5,
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eCompressionFormat_ETC1,
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eCompressionFormat_BPTC,
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eCompressionFormat_PVRTC,
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kNumCompressionFormats
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};
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#include "Image.h"
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class CompressedImage : public FasTC::Image<FasTC::Pixel> {
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private:
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ECompressionFormat m_Format;
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uint8 *m_CompressedData;
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public:
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CompressedImage(const CompressedImage &);
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CompressedImage &operator=(const CompressedImage &);
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// Create a compressed image from the given data according to
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// the passed format. The size of the data is expected to conform
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// to the width, height, and format specified.
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CompressedImage(
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const uint32 width,
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const uint32 height,
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const ECompressionFormat format,
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const uint8 *data
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);
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virtual ~CompressedImage();
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virtual FasTC::Image<FasTC::Pixel> *Clone() const {
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return new CompressedImage(*this);
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}
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virtual void ComputePixels();
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static uint32 GetCompressedSize(uint32 uncompressedSize, ECompressionFormat format);
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static uint32 GetUncompressedSize(uint32 compressedSize, ECompressionFormat format) {
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uint32 cmp = GetCompressedSize(compressedSize, format);
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return compressedSize * (compressedSize / cmp);
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}
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uint32 GetCompressedSize() const {
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return GetCompressedSize(GetUncompressedSize(), m_Format);
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}
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uint32 GetUncompressedSize() const {
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return GetWidth() * GetHeight() * sizeof(uint32);
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}
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// Decompress the compressed image data into outBuf. outBufSz is expected
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// to be the proper size determined by the width, height, and format.
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// !FIXME! We should have a function to explicitly return the in/out buf
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// size for a given compressed image.
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bool DecompressImage(uint8 *outBuf, uint32 outBufSz) const;
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ECompressionFormat GetFormat() const { return m_Format; }
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};
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#endif // _COMPRESSED_IMAGE_H_
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