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