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//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// DESCRIPTION:
// Refresh/rendering module, shared data struct definitions.
//
#ifndef V_PATCH_H
#define V_PATCH_H
// Patches.
// A patch holds one or more columns.
// Patches are used for sprites and all masked pictures,
// and we compose textures from the TEXTURE1/2 lists
// of patches.
typedef struct
{
short width; // bounding box size
short height;
short leftoffset; // pixels to the left of origin
short topoffset; // pixels below the origin
int columnofs[8]; // only [width] used
// the [0] is &columnofs[width]
} PACKEDATTR patch_t;
// posts are runs of non masked source pixels
typedef struct
{
byte topdelta; // -1 is the last post in a column
byte length; // length data bytes follows
} PACKEDATTR post_t;
// column_t is a list of 0 or more post_t, (byte)-1 terminated
typedef post_t column_t;
#endif
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