/****************************************************************************
* graphics/nxglib/nxglib_bitblit.h
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 __GRAPHICS_NXGLIB_NXGLIB_BITBLIT_H
#define __GRAPHICS_NXGLIB_NXGLIB_BITBLIT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <nuttx/nxglib.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Make sure the the bits-per-pixel value has been set by the includer of
* this header file.
*/
#ifndef NXGLIB_BITSPERPIXEL
# error "NXGLIB_BITSPERPIXEL must be defined before including this header file"
#endif
/* Set up bit blit macros for this BPP */
#if NXGLIB_BITSPERPIXEL == 1
# define NXGL_PIXELSHIFT 3
# define NXGL_PIXELMASK 7
# define NXGL_MULTIPIXEL(p) ((p) ? 0xff : 0x00)
# define NXGL_PIXEL_T ubyte
#elif NXGLIB_BITSPERPIXEL == 2
# define NXGL_PIXELSHIFT 2
# define NXGL_PIXELMASK 3
# define NXGL_MULTIPIXEL(p) ((ubyte)(p) << 6 | (ubyte)(p) << 4 | (ubyte)(p) << 2 | (p))
# define NXGL_PIXEL_T ubyte
#elif NXGLIB_BITSPERPIXEL == 4
# define NXGL_PIXELSHIFT 1
# define NXGL_PIXELMASK 1
# define NXGL_MULTIPIXEL(p) ((ubyte)(p) << 4 | (p))
# define NXGL_PIXEL_T ubyte
#elif NXGLIB_BITSPERPIXEL == 8
# define NXGL_SCALEX(x) (x)
# define NXGL_PIXEL_T ubyte
#elif NXGLIB_BITSPERPIXEL == 16
# define NXGL_SCALEX(x) ((x) << 1)
# define NXGL_PIXEL_T uint16
#elif NXGLIB_BITSPERPIXEL == 24
# define NXGL_SCALEX(x) (((x) << 1) + (x))
# define NXGL_PIXEL_T uint32
#elif NXGLIB_BITSPERPIXEL == 32
# define NXGL_SCALEX(x) ((x) << 2)
# define NXGL_PIXEL_T uint32
#endif
#if NXGLIB_BITSPERPIXEL < 8
# define NXGL_SCALEX(x) ((x) >> NXGL_PIXELSHIFT)
# define NXGL_REMAINDERX(x) ((x) & NXGL_PIXELMASK)
# define NXGL_ALIGNDOWN(x) ((x) & ~NXGL_PIXELMASK)
# define NXGL_ALIGNUP(x) (((x) + NXGL_PIXELMASK) & ~NXGL_PIXELMASK)
# define NXGL_MEMSET(dest,value,width) \
{ \
FAR ubyte *_ptr = (FAR ubyte*)dest; \
int _nby = NXGL_SCALEX(width); \
while (_nby--) \
{ \
*_ptr++ = value; \
} \
}
# define NXGL_MEMCPY(dest,src,width) \
{ \
FAR ubyte *_dptr = (FAR ubyte*)dest; \
FAR ubyte *_sptr = (FAR ubyte*)src; \
int _nby = NXGL_SCALEX(width); \
while (_nby--) \
{ \
*_dptr++ = *_sptr++; \
} \
}
#elif NXGLIB_BITSPERPIXEL == 24
# define NXGL_MEMSET(dest,value,width) \
{ \
FAR ubyte *_ptr = (FAR ubyte*)dest; \
nxgl_coord_t _npix = width; \
while (_npix--) \
{ \
*_ptr++ = value; \
*_ptr++ = value >> 8; \
*_ptr++ = value >> 16; \
} \
}
# define NXGL_MEMCPY(dest,src,width) \
{ \
FAR ubyte *_dptr = (FAR ubyte*)dest; \
FAR ubyte *_sptr = (FAR ubyte*)src; \
nxgl_coord_t _npix = width; \
while (_npix--) \
{ \
*_dptr++ = *_sptr++; \
*_dptr++ = *_sptr++; \
*_dptr++ = *_sptr++; \
} \
}
#else
# define NXGL_MEMSET(dest,value,width) \
{ \
FAR NXGL_PIXEL_T *_ptr = (FAR NXGL_PIXEL_T*)dest; \
nxgl_coord_t _npix = width; \
while (_npix--) \
{ \
*_ptr++ = value; \
} \
}
# define NXGL_MEMCPY(dest,src,width) \
{ \
FAR NXGL_PIXEL_T *_dptr = (FAR NXGL_PIXEL_T*)dest; \
FAR NXGL_PIXEL_T *_sptr = (FAR NXGL_PIXEL_T*)src; \
nxgl_coord_t _npix = width; \
while (_npix--) \
{ \
*_dptr++ = *_sptr++; \
} \
}
#endif
/* Form a function name by concatenating two strings */
#define _NXGL_FUNCNAME(a,b) a ## b
#define NXGL_FUNCNAME(a,b) _NXGL_FUNCNAME(a,b)
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __GRAPHICS_NXGLIB_NXGLIB_BITBLIT_H */
