pngview.c File Reference

#include "main.h"
#include "display.h"
#include "ff.h"
#include "jogwheel.h"
#include "dbg.h"

Functions
int	_f_fread (struct _reent *_r, void *pv, char *pc, int n)
int	_f_fwrite (struct _reent *_r, void *pv, const char *pc, int n)
int	_f_fclose (struct _reent *_r, void *pv)
_fpos_t	_f_fseek (struct _reent *_r, void *pv, _fpos_t fpos, int ipos)
FILE *	f_fopen (char *fn)
void	f_fclose (FILE *pf)
void	pngview (void)

Variables
char	png_fnames [256][8]
int	png_cnt = 0
FIL	fil

Function Documentation

_f_fread()

int _f_fread	(	struct _reent *	_r,
		void *	pv,
		char *	pc,
		int	n
	)

                                                           {
    UINT br = 0;
    f_read(&fil, pc, n, &br);
    return br;
}

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_f_fwrite()

int _f_fwrite	(	struct _reent *	_r,
		void *	pv,
		const char *	pc,
		int	n
	)

                                                                  {
    return 0;
}

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_f_fclose()

int _f_fclose	(	struct _reent *	_r,
		void *	pv
	)

                                           {
    return 0;
}

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_f_fseek()

_fpos_t _f_fseek	(	struct _reent *	_r,
		void *	pv,
		_fpos_t	fpos,
		int	ipos
	)

                                                                      {
    return 0;
}

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f_fopen()

FILE* f_fopen

(

char *

fn

)

                        {
    f_open(&fil, fn, FA_READ);
    FILE *pf = malloc(sizeof(FILE));
    memset(pf, 0, sizeof(FILE));
    pf->_read = _f_fread;
    pf->_write = _f_fwrite;
    pf->_close = _f_fclose;
    pf->_seek = _f_fseek;
    pf->_file = -1;
    //  pf->_flags = __SRD | __SNBF;
    pf->_flags = __SRD;
    pf->_lbfsize = 512;
    pf->_bf._base = (uint8_t *)malloc(pf->_lbfsize);
    pf->_bf._size = pf->_lbfsize;
 
    return pf;
}

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f_fclose()

void f_fclose

(

FILE *

pf

)

                        {
    f_close(&fil);
    if (pf != 0) {
        if (pf->_bf._base != 0)
            free(pf->_bf._base);
        free(pf);
    }
}

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pngview()

void pngview

(

void

)

                   {
    DIR dir;
    FRESULT fres = f_opendir(&dir, "/");
    if (fres == FR_OK) {
        FILINFO info;
        fres = f_findfirst(&dir, &info, "", "*.png");
        while (fres == FR_OK) {
            strncpy(png_fnames[png_cnt++], info.fname, 8);
            fres = f_findnext(&dir, &info);
            if (strncmp(png_fnames[png_cnt - 1], info.fname, 8) == 0) {
                png_cnt--;
                break; //hack because f_findnext returns allways FR_OK
            }
        }
    }
    f_closedir(&dir);
    jogwheel_encoder_set(0, 0, png_cnt - 1);
    int old_encoder = -1;
    while (png_cnt > 0) {
        if (jogwheel_encoder != old_encoder) {
            old_encoder = jogwheel_encoder;
            char fn[16] = "/";
            _dbg("%d\n", jogwheel_encoder);
            strncpy(fn + 1, png_fnames[jogwheel_encoder], 8);
            strcat(fn, ".PNG");
            _dbg("%s\n", fn);
            FILE *pf = f_fopen(fn);
            display->draw_png(point_ui16(0, 0), pf);
            f_fclose(pf);
        } else
            osDelay(1);
        if (jogwheel_button_down >= 1000)
            break;
    }
}

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Variable Documentation

png_fnames

char png_fnames[256][8]

png_cnt

int png_cnt = 0

fil

FIL fil