6e4437255b
New low level driver interface: Only Win32 ported currently Significant reduction in GDISP stack usage Improved performance particularly for native streaming drivers New circle, ellipse, arc routines (draw and fill) that are significantly more efficient and don't overdraw New arc draw algorithm that measures angles correctly. New arc fill algorithm for that actually works without overdrawing or gaps. Much more to come...
195 lines
6.1 KiB
C
195 lines
6.1 KiB
C
/*
|
|
* This file is subject to the terms of the GFX License. If a copy of
|
|
* the license was not distributed with this file, you can obtain one at:
|
|
*
|
|
* http://ugfx.org/license.html
|
|
*/
|
|
|
|
/**
|
|
* @file include/gmisc/gmisc.h
|
|
* @brief GMISC - Miscellaneous Routines header file.
|
|
*
|
|
* @addtogroup GMISC
|
|
*
|
|
* @brief Module which contains different features such as array conversions
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _GMISC_H
|
|
#define _GMISC_H
|
|
|
|
#include "gfx.h"
|
|
|
|
/*===========================================================================*/
|
|
/* Type definitions */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Sample data formats
|
|
* @note These are defined regardless of whether you use the GMISC module
|
|
* or not as they are used in lots of places.
|
|
*/
|
|
typedef enum ArrayDataFormat_e {
|
|
ARRAY_DATA_4BITUNSIGNED = 4, ARRAY_DATA_4BITSIGNED = 5,
|
|
ARRAY_DATA_8BITUNSIGNED = 8, ARRAY_DATA_8BITSIGNED = 9,
|
|
ARRAY_DATA_10BITUNSIGNED = 10, ARRAY_DATA_10BITSIGNED = 11,
|
|
ARRAY_DATA_12BITUNSIGNED = 12, ARRAY_DATA_12BITSIGNED = 13,
|
|
ARRAY_DATA_14BITUNSIGNED = 14, ARRAY_DATA_14BITSIGNED = 15,
|
|
ARRAY_DATA_16BITUNSIGNED = 16, ARRAY_DATA_16BITSIGNED = 17,
|
|
} ArrayDataFormat;
|
|
|
|
/**
|
|
* @brief The type for a fixed point type.
|
|
* @details The top 16 bits are the integer component, the bottom 16 bits are the real component.
|
|
*/
|
|
typedef int32_t fixed;
|
|
|
|
/**
|
|
* @brief Macros to convert to and from a fixed point.
|
|
* @{
|
|
*/
|
|
#define FIXED(x) ((fixed)(x)<<16) /* @< integer to fixed */
|
|
#define NONFIXED(x) ((x)>>16) /* @< fixed to integer */
|
|
#define FIXED0_5 32768 /* @< 0.5 as a fixed (used for rounding) */
|
|
#define FP2FIXED(x) ((fixed)((x)*65536.0)) /* @< floating point to fixed */
|
|
#define FIXED2FP(x) ((double)(x)/65536.0) /* @< fixed to floating point */
|
|
/* @} */
|
|
|
|
/**
|
|
* @brief The famous number pi
|
|
*/
|
|
#define PI 3.1415926535897932384626433832795028841971693993751
|
|
|
|
/**
|
|
* @brief pi as a fixed point
|
|
*/
|
|
#define FIXED_PI FP2FIXED(PI)
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#if GFX_USE_GMISC || defined(__DOXYGEN__)
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if GMISC_NEED_ARRAYOPS || defined(__DOXYGEN__)
|
|
/**
|
|
* @brief Convert from one array format to another array format.
|
|
*
|
|
* @param[in] srcfmt The format of the source array
|
|
* @param[in] src The source array
|
|
* @param[in] dstfmt The format of the destination array
|
|
* @param[in] dst The dstination array
|
|
* @param[in] cnt The number of array elements to convert
|
|
*
|
|
* @note Assumes the destination buffer is large enough for the resultant data.
|
|
* @note This routine is optimised to perform as fast as possible.
|
|
* @note No type checking is performed on the source format. It is assumed to
|
|
* have only valid values eg. ARRAY_DATA_4BITSIGNED will have values
|
|
* 0000 -> 0111 for positive numbers and 1111 -> 1000 for negative numbers
|
|
* Bits 5 -> 8 in the storage byte are treated in an undefined manner.
|
|
* @note If srcfmt or dstfmt is an unknown format, this routine does nothing
|
|
* with no warning that something is wrong
|
|
*
|
|
* @api
|
|
*/
|
|
void gmiscArrayConvert(ArrayDataFormat srcfmt, void *src, ArrayDataFormat dstfmt, void *dst, size_t cnt);
|
|
|
|
#if 0
|
|
void gmiscArrayTranslate(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int trans);
|
|
|
|
void gmiscArrayMultiply(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int mult);
|
|
|
|
void gmiscArrayDivide(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int mdiv);
|
|
|
|
void gmiscArrayMultDiv(ArrayDataFormat fmt, void *src, void *dst, size_t cnt, int mult, int div);
|
|
|
|
void gmiscArrayAdd(ArrayDataFormat fmt, void *src1, void *src2, void *dst, size_t cnt);
|
|
|
|
void gmiscArrayAddNoOverflow(ArrayDataFormat fmt, void *src1, void *src2, void *dst, size_t cnt);
|
|
#endif
|
|
#endif
|
|
|
|
#if GMISC_NEED_FASTTRIG || defined(__DOXYGEN__)
|
|
extern const double sintabledouble[];
|
|
|
|
/**
|
|
* @brief Fast Table Based Trig functions
|
|
* @return A double in the range -1.0 .. 0.0 .. 1.0
|
|
*
|
|
* @param[in] degrees The angle in degrees (not radians)
|
|
*
|
|
* @note These functions use degrees rather than radians to describe the angle.
|
|
*
|
|
* @api
|
|
* @{
|
|
*/
|
|
double fsin(int degrees);
|
|
double fcos(int degrees);
|
|
/** @}
|
|
*
|
|
* @brief Fast Table Based Trig functions
|
|
* @return A double in the range -1.0 .. 0.0 .. 1.0
|
|
*
|
|
* @param[in] degrees The angle in degrees 0 .. 359
|
|
*
|
|
* @note These functions use degrees rather than radians to describe the angle.
|
|
* @note These functions are super fast but require the parameter to be in range.
|
|
* Use the lowercase functions if the parameter may not be in range or if a
|
|
* required trig function is not supported in this form.
|
|
*
|
|
* @api
|
|
* @{
|
|
*/
|
|
#define FSIN(degrees) sintabledouble[degrees];
|
|
/** @} */
|
|
#endif
|
|
|
|
#if GMISC_NEED_FIXEDTRIG || defined(__DOXYGEN__)
|
|
extern const fixed sintablefixed[];
|
|
|
|
/**
|
|
* @brief Fast Table Based Trig functions
|
|
* @return A fixed point in the range -1.0 .. 0.0 .. 1.0
|
|
*
|
|
* @param[in] degrees The angle in degrees (not radians)
|
|
*
|
|
* @note These functions use degrees rather than radians to describe the angle.
|
|
*
|
|
* @api
|
|
* @{
|
|
*/
|
|
fixed ffsin(int degrees);
|
|
fixed ffcos(int degrees);
|
|
/** @}
|
|
*
|
|
* @brief Fast Table Based Trig functions
|
|
* @return A fixed point in the range -1.0 .. 0.0 .. 1.0
|
|
*
|
|
* @param[in] degrees The angle in degrees 0 .. 359
|
|
*
|
|
* @note These functions use degrees rather than radians to describe the angle.
|
|
* @note These functions are super fast but require the parameter to be in range.
|
|
* Use the lowercase functions if the parameter may not be in range or if a
|
|
* required trig function is not supported in this form.
|
|
*
|
|
* @api
|
|
* @{
|
|
*/
|
|
#define FFSIN(degrees) sintablefixed[degrees];
|
|
/** @} */
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* GFX_USE_MISC */
|
|
|
|
#endif /* _GMISC_H */
|
|
/** @} */
|
|
|