nuttx-apps/graphics/traveler/include/trv_bitmaps.h

/****************************************************************************
 * apps/graphics/traveler/include/trv_bitmaps.h
 * This file contains definitions for the texture bitmaps
 *
 *   Copyright (C) 2014 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_INCLUDE_TRV_BITMAPS_H
#define __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_BITMAPS_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include "trv_types.h"

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

#define BITMAP_WIDTH  64
#define BITMAP_HEIGHT 64
#define BITMAP_LOG2H   6
#define BITMAP_SIZE   (BITMAP_WIDTH * BITMAP_HEIGHT)
#define BITMAP_IMASK  (BITMAP_HEIGHT-1)
#define BITMAP_JMASK  (BITMAP_WIDTH-1)
#define BITMAP_JSHIFT  6
#define BMICLIP(i)    ((i) & BITMAP_IMASK)
#define BMJCLIP(i)    ((i) & BITMAP_JMASK)
#define BMOFFSET(i,j) (((i) << BITMAP_JSHIFT) | (j))
#define MAX_BITMAPS   256

/****************************************************************************
 * Public Types
 ****************************************************************************/

struct trv_bitmap_s
{
  uint16_t w;
  uint16_t h;
  uint8_t log2h;
  FAR trv_pixel_t *bm;
};

/****************************************************************************
 * Public Data
 ****************************************************************************/

/* These point to the (allocated) bit map buffers for the even and odd
 * bitmaps
 */

extern FAR struct trv_bitmap_s *g_even_bitmaps[MAX_BITMAPS];
#ifndef WEDIT
extern FAR struct trv_bitmap_s *g_odd_bitmaps[MAX_BITMAPS];
#endif

/* This is the maximum value + 1 of a texture code */

extern uint16_t g_trv_nbitmaps;

/* These are the colors from the worldPalette which should used to rend
 * the sky and ground
 */

extern trv_pixel_t g_sky_color;
extern trv_pixel_t g_ground_color;

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

int trv_initialize_bitmaps(void);
void trv_free_bitmaps(void);
int trv_load_bitmapfile(FAR const char *bitmapfile);
FAR struct trv_bitmap_s *trv_read_texture(FAR char *filename);

#endif /* __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_BITMAPS_H */