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/****************************************************************************
* apps/graphics/tiff/tiff_internal.h
*
* Copyright (C) 2011 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_TIFF_TIFF_INTERNAL_H
#define __APPS_GRAPHICS_TIFF_TIFF_INTERNAL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <nuttx/nx/nxglib.h>
#include <apps/tiff.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Image Type ***************************************************************/
#define IMGFLAGS_BILEV_BIT (1 << 0)
#define IMGFLAGS_GREY_BIT (1 << 1)
#define IMGFLAGS_GREY8_BIT (1 << 2)
#define IMGFLAGS_RGB_BIT (1 << 3)
#define IMGFLAGS_RGB565_BIT (1 << 4)
#define IMGFLAGS_FMT_Y1 (IMGFLAGS_BILEV_BIT)
#define IMGFLAGS_FMT_Y4 (IMGFLAGS_GREY_BIT)
#define IMGFLAGS_FMT_Y8 (IMGFLAGS_GREY_BIT|IMGFLAGS_GREY8_BIT)
#define IMGFLAGS_FMT_RGB16_565 (IMGFLAGS_RGB_BIT)
#define IMGFLAGS_FMT_RGB24 (IMGFLAGS_RGB_BIT|IMGFLAGS_RGB565_BIT)
#define IMGFLAGS_ISBILEV(f) \
(((f) & IMGFLAGS_BILEV_BIT) != 0)
#define IMGFLAGS_ISGREY(f) \
(((f) & IMGFLAGS_GREY_BIT) != 0)
#define IMGFLAGS_ISGREY4(f) \
(((f) & (IMGFLAGS_GREY_BIT|IMGFLAGS_GREY8_BIT)) == IMGFLAGS_GREY_BIT)
#define IMGFLAGS_ISGREY8(f) \
(((f) & (IMGFLAGS_GREY_BIT|IMGFLAGS_GREY8_BIT)) == (IMGFLAGS_GREY_BIT|IMGFLAGS_GREY8_BIT))
#define IMGFLAGS_ISRGB(f) \
(((f) & IMGFLAGS_FMT_RGB24) != 0)
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: tiff_read
*
* Description:
* Read TIFF data from the specified file
*
* Input Parameters:
* fd - Open file descriptor to read from
* buffer - Read-only buffer containing the data to be written
* count - The number of bytes to write
*
* Returned Value:
* On success, then number of bytes read; Zero is returned on EOF.
* Otherwise, a negated errno value on failure.
*
****************************************************************************/
EXTERN ssize_t tiff_read(int fd, FAR void *buffer, size_t count);
/****************************************************************************
* Name: tiff_write
*
* Description:
* Write TIFF data to the specified file
*
* Input Parameters:
* fd - Open file descriptor to write to
* buffer - Read-only buffer containing the data to be written
* count - The number of bytes to write
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
EXTERN int tiff_write(int fd, FAR const void *buffer, size_t count);
/****************************************************************************
* Name: tiff_putint16
*
* Description:
* Write two bytes to the outfile.
*
* Input Parameters:
* fd - File descriptor to be used.
* value - The 2-byte, uint16_t value to write
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
EXTERN int tiff_putint16(int fd, uint16_t value);
/****************************************************************************
* Name: tiff_putint32
*
* Description:
* Write four bytes to the outfile.
*
* Input Parameters:
* fd - File descriptor to be used.
* value - The 4-byte, uint32_t value to write
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
EXTERN int tiff_putint32(int fd, uint32_t value);
/****************************************************************************
* Name: tiff_putstring
*
* Description:
* Write a string of fixed length to the outfile.
*
* Input Parameters:
* fd - File descriptor to be used.
* string - A pointer to the memory containing the string
* len - The length of the string (including the NUL terminator)
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
EXTERN int tiff_putstring(int fd, FAR const char *string, int len);
/****************************************************************************
* Name: tiff_wordalign
*
* Description:
* Pad a file with zeros as necessary to achieve word alignament.
*
* Input Parameters:
* fd - File descriptor to be used.
* size - The current size of the file
*
* Returned Value:
* The new size of the file on success. A negated errno value on failure.
*
****************************************************************************/
EXTERN ssize_t tiff_wordalign(int fd, size_t size);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __APPS_GRAPHICS_TIFF_TIFF_INTERNAL_H */
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