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62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
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/*
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Copyright (c) 2014, Conor Stokes
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef INDEX_COMPRESSION_CONSTANTS_H__
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#define INDEX_COMPRESSION_CONSTANTS_H__
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#pragma once
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// Constant fifo and code sizes.
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const int VERTEX_FIFO_SIZE = 32;
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const int VERTEX_FIFO_MASK = VERTEX_FIFO_SIZE - 1;
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const int EDGE_FIFO_SIZE = 32;
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const int EDGE_FIFO_MASK = EDGE_FIFO_SIZE - 1;
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const int CACHED_EDGE_BITS = 5;
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const int CACHED_VERTEX_BITS = 5;
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const int IB_CODE_BITS = 2;
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// Edge in the edge fifo.
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struct Edge
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{
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uint32_t first;
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uint32_t second;
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};
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// Codes
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enum IndexBufferCodes
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{
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// Represents a yet un-seen vertex.
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IB_NEW_VERTEX = 0,
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// Represents 2 vertices on an edge in the edge fifo, which will be used as the first 2 vertices of the
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// triangle.
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IB_CACHED_EDGE = 1,
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// Represents a vertex that has been seen recently and is still in the vertex fifo.
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IB_CACHED_VERTEX = 2,
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// Represents a vertex that has been seen
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IB_FREE_VERTEX = 3
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};
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#endif
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