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https://github.com/yuzu-emu/FasTC.git
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79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
// Copyright 2016 The University of North Carolina at Chapel Hill
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Please send all BUG REPORTS to <pavel@cs.unc.edu>.
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// <http://gamma.cs.unc.edu/FasTC/>
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#ifndef _COMPRESSED_IMAGE_H_
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#define _COMPRESSED_IMAGE_H_
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#include "FasTC/TexCompTypes.h"
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#include "FasTC/CompressionFormat.h"
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#include "FasTC/Image.h"
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class CompressedImage : public FasTC::Image<FasTC::Pixel> {
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private:
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FasTC::ECompressionFormat m_Format;
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uint8 *m_CompressedData;
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typedef FasTC::Image<FasTC::Pixel> UncompressedImage;
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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 FasTC::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, FasTC::ECompressionFormat format);
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static uint32 GetUncompressedSize(uint32 compressedSize, FasTC::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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const uint8 *GetCompressedData() const { return m_CompressedData; }
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FasTC::ECompressionFormat GetFormat() const { return m_Format; }
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};
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#endif // _COMPRESSED_IMAGE_H_
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