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73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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Copyright 2007 nVidia, Inc.
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Licensed under the Apache License, Version 2.0 (the "License"); 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 http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software 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 limitations under the License.
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*/
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#pragma once
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#ifndef _ZOH_H
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#define _ZOH_H
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#include "tile.h"
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// UNUSED ZOH MODES are 0x13, 0x17, 0x1b, 0x1f
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#define EXTERNAL_RELEASE 1 // define this if we're releasing this code externally
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#define NREGIONS_TWO 2
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#define NREGIONS_ONE 1
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#define NCHANNELS 3
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// Note: this code only reads OpenEXR files, which are only in F16 format.
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// if unsigned is selected, the input is clamped to >= 0.
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// if f16 is selected, the range is clamped to 0..0x7bff.
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struct FltEndpts
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{
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nv::Vector3 A;
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nv::Vector3 B;
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};
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struct IntEndpts
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{
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int A[NCHANNELS];
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int B[NCHANNELS];
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};
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struct ComprEndpts
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{
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uint A[NCHANNELS];
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uint B[NCHANNELS];
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};
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class ZOH
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{
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public:
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static const int BLOCKSIZE=16;
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static const int BITSIZE=128;
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static Format FORMAT;
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static void compress(const Tile &t, char *block);
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static void decompress(const char *block, Tile &t);
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static double compressone(const Tile &t, char *block);
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static double compresstwo(const Tile &t, char *block);
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static void decompressone(const char *block, Tile &t);
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static void decompresstwo(const char *block, Tile &t);
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static double refinetwo(const Tile &tile, int shapeindex_best, const FltEndpts endpts[NREGIONS_TWO], char *block);
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static double roughtwo(const Tile &tile, int shape, FltEndpts endpts[NREGIONS_TWO]);
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static double refineone(const Tile &tile, int shapeindex_best, const FltEndpts endpts[NREGIONS_ONE], char *block);
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static double roughone(const Tile &tile, int shape, FltEndpts endpts[NREGIONS_ONE]);
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static bool isone(const char *block);
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};
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#endif // _ZOH_H
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