109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file include/gmisc/gmisc.h
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* @brief GMISC - Miscellaneous Routines header file.
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*
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* @addtogroup GAUDIN
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*
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* @{
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*/
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#ifndef _GMISC_H
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#define _GMISC_H
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#include "gfx.h"
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/*===========================================================================*/
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/* Type definitions */
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/*===========================================================================*/
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/**
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* @brief Sample data formats
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* @note These are defined regardless of whether you use the GMISC module
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* or not as they are used in lots of places.
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*/
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typedef enum ArrayDataFormat_e {
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ARRAY_DATA_4BITUNSIGNED = 4, ARRAY_DATA_4BITSIGNED = 5,
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ARRAY_DATA_8BITUNSIGNED = 8, ARRAY_DATA_8BITSIGNED = 9,
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ARRAY_DATA_10BITUNSIGNED = 10, ARRAY_DATA_10BITSIGNED = 11,
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ARRAY_DATA_12BITUNSIGNED = 12, ARRAY_DATA_12BITSIGNED = 13,
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ARRAY_DATA_14BITUNSIGNED = 14, ARRAY_DATA_14BITSIGNED = 15,
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ARRAY_DATA_16BITUNSIGNED = 16, ARRAY_DATA_16BITSIGNED = 17,
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} ArrayDataFormat;
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if GFX_USE_GMISC || defined(__DOXYGEN__)
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if GMISC_NEED_ARRAYOPS || defined(__DOXYGEN__)
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/**
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* @brief Convert from one array format to another array format.
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*
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* @param[in] srcfmt The format of the source array
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* @param[in] src The source array
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* @param[in] dstfmt The format of the destination array
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* @param[in] dst The dstination array
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* @param[in] cnt The number of array elements to convert
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*
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* @note Assumes the destination buffer is large enough for the resultant data.
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* @note This routine is optimised to perform as fast as possible.
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* @note No type checking is performed on the source format. It is assumed to
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* have only valid values eg. ARRAY_DATA_4BITSIGNED will have values
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* 0000 -> 0111 for positive numbers and 1111 -> 1000 for negative numbers
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* Bits 5 -> 8 in the storage byte are treated in an undefined manner.
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* @note If srcfmt or dstfmt is an unknown format, this routine does nothing
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* with no warning that something is wrong
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*
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* @api
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*/
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void gmiscArrayConvert(ArrayDataFormat srcfmt, void *src, ArrayDataFormat dstfmt, void *dst, size_t cnt);
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#if 0
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void gmiscArrayTranslate(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int trans);
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void gmiscArrayMultiply(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int mult);
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void gmiscArrayDivide(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int mdiv);
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void gmiscArrayMultDiv(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int mult, int div);
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void gmiscArrayAdd(ArrayDataFormat fmt, void *src1, void *src2, void *dst, size_t cnt);
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void gmiscArrayAddNoOverflow(ArrayDataFormat fmt, void *src1, void *src2, void *dst, size_t cnt);
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* GFX_USE_MISC */
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#endif /* _GMISC_H */
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/** @} */
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