103 lines
3.9 KiB
C
103 lines
3.9 KiB
C
|
/****************************************************************************
|
||
|
|
* apps/graphics/traveler/tools/libwld/wld_paltable.h
|
||
|
|
* This file contains definitions for the world model
|
||
|
|
*
|
||
|
|
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
||
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
||
|
|
* used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* 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 __APPS_GRAPHICS_TRAVELER_TOOSL_LIBWLD_WLD_PALTABLE_H
|
||
|
|
#define __APPS_GRAPHICS_TRAVELER_TOOSL_LIBWLD_WLD_PALTABLE_H
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C"
|
||
|
|
{
|
||
|
|
#endif /* __cplusplus */
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Pre-processor Definitions
|
||
|
|
*************************************************************************/
|
||
|
|
|
||
|
|
/* Here some palette-related definitions. */
|
||
|
|
|
||
|
|
#define PALETTE_SIZE 256 /* This is the number of colors in the palette */
|
||
|
|
#define NUM_ZONES 16 /* This is the number of distance zones in the palette table */
|
||
|
|
|
||
|
|
/* Here are some macros used to access the palTable. */
|
||
|
|
|
||
|
|
#define PAL_SCALE_BITS 2
|
||
|
|
#define GET_DISTANCE(x,y) ( (x) >= (y) ? ((x) + ((y) >>1)) : ((y) + ((x) >>1)))
|
||
|
|
#define GET_ZONE(x,y) (GET_DISTANCE(x,y) >> (sSHIFT+PAL_SCALE_BITS))
|
||
|
|
#define GET_PALINDEX(d) ((d) >= NUM_ZONES ? (NUM_ZONES-1) : (d))
|
||
|
|
#define GET_PALPTR(d) palTable[GET_PALINDEX(d)]
|
||
|
|
|
||
|
|
/* This is a special version which is used by the texture logic. The
|
||
|
|
* texture engine used 8 bits of fraction in many of its calculation
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define GET_FZONE(x,y,n) (GET_DISTANCE(x,y) >> (sSHIFT+PAL_SCALE_BITS-(n)))
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Public Type Definitions
|
||
|
|
*************************************************************************/
|
||
|
|
|
||
|
|
/* World file return codes */
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
PALR_FILE_OPEN_ERROR = 150,
|
||
|
|
PALR_TOO_MANY_RANGES
|
||
|
|
};
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Public Data
|
||
|
|
*************************************************************************/
|
||
|
|
|
||
|
|
/* This is the palette table which is used to adjust the texture values
|
||
|
|
* with distance
|
||
|
|
*/
|
||
|
|
|
||
|
|
extern pixelType *palTable[NUM_ZONES];
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Pulblic Function Prototypes
|
||
|
|
*************************************************************************/
|
||
|
|
|
||
|
|
uint8_t wld_LoadPalTable(char *file);
|
||
|
|
void wld_DiscardPalTable(void);
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* __APPS_GRAPHICS_TRAVELER_TOOSL_LIBWLD_WLD_PALTABLE_H */
|
||
|
|
|