exposurses

Check-in [7312ab2b6f]
Login
Home Timeline Branches Tags Tickets Wiki

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Add under/over exposure indication in to the shutter/aperture menus

Keeping the NULLs in makes array indices very confusing, but this seems
to be the right thing to do.

Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | origin/master | trunk
Files: files | file ages | folders
SHA3-256: 7312ab2b6fc9fee492c9f7e8ed50abeef074a5051e38a8a3c9d5674f837df4f4
User & Date: base@atomicules.co.uk 2013-09-18 12:48:35
Context
2013-09-18
12:49
Ignore selection of OVER/UNDER in shutter/aperture menus

Since this seems easier than trying to prevent selection. check-in: 4cc8e33f3c user: base@atomicules.co.uk tags: origin/master, trunk

12:48
Add under/over exposure indication in to the shutter/aperture menus

Keeping the NULLs in makes array indices very confusing, but this seems
to be the right thing to do. check-in: 7312ab2b6f user: base@atomicules.co.uk tags: origin/master, trunk

11:01
Fix menu numbering (from adding exposure menu in)

Didn't change functionality (it was still working), but just gives
better consistency to the code. check-in: 4a3cabadc2 user: base@atomicules.co.uk tags: origin/master, trunk

Changes
Hide Diffs Unified Diffs Show Whitespace Changes Patch

Changes to exposurses.c. 

43
44
45
46
47
48
49

50
51
52
53
54
55
56
57
58
59
60

61
62
63
64

65
66
67
68
69
70
71
72

73
74
75
76
77
78
79
..
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
...
228
229
230
231
232
233
234
235

236
237
238
239
240
241
242
243
244
245
246
247
248
249

250
251
252
253
254
255
256
...
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397


398
399
400

401
402
403
404
405











406
407
408
409
410
411
412
413
414
415
416
















417
418
419
420
421
422
423

	"800",
	"1600",
	"3200",
	NULL
};

char *shutter_array[] = {

	"1/1000",
	"1/500",
	"1/250",
	"1/125",
	"1/60",
	"1/30",
	"1/15",
	"1/8",
	"1/4",
	"1/2",
	"1",

	NULL
};

char *aperture_array[] = {

	"f/1.4",
	"f/2",
	"f/2.8",
	"f/4",
	"f/5.6",
	"f/8",
	"f/11",
	"f/16",

	NULL
};

ITEM **exposure_items;
ITEM **iso_items;
ITEM **shutter_items;
ITEM **aperture_items;
................................................................................
void remove_menu(ITEM **items, MENU *men, int n);
void print_in_middle(WINDOW *win, int starty, int startx, int width, char *string, chtype color);
MENU *add_menu(char **array, ITEM **items, int n);
WINDOW *add_window(int xpos, char *title);
int exposure(int iso);
double shutter(int exposure, double aperture);
double aperture(int exposure, double shutter);
int nearest_match(double x, int menu);
double fraction_to_double(char *fraction);
/* No one will ever need more than 9 bytes! */
char exposure_sel[9] = "";
char iso_sel[9] = "";
char shutter_sel[9] = "";
char aperture_sel[9] = "";
int selection_counter = 1;
................................................................................
							menu_driver(shutter_menu, REQ_SCR_UPAGE);
							menu_driver(shutter_menu, REQ_SCR_DPAGE);
							/* There is probably a nicer way to format the below */
							set_menu_pattern(
								shutter_menu,
								shutter_array[nearest_match(
									shutter(exposure(atoi(iso_sel)), strtod(aperture_sel_, NULL)),
									3

								)]
							);
							menu_driver(shutter_menu, REQ_DOWN_ITEM);
							menu_driver(shutter_menu, REQ_UP_ITEM);
							wrefresh(shutter_win);
						}
						if (strcmp("", aperture_sel) == 0) {
							menu_driver(aperture_menu, REQ_SCR_UPAGE);
							menu_driver(aperture_menu, REQ_SCR_DPAGE);
							set_menu_pattern(
								aperture_menu,
								aperture_array[nearest_match(
									aperture(exposure(atoi(iso_sel)), fraction_to_double(shutter_sel)),
									4

								)]
							);
							menu_driver(aperture_menu, REQ_DOWN_ITEM);
							menu_driver(aperture_menu, REQ_UP_ITEM);
							wrefresh(aperture_win);
						}
						/* clear the selections for next time */
................................................................................
}

double aperture (int exposure, double shutter) {
	/* EV = log2 (N^2/t) */
	return sqrt(pow(2, exposure) * shutter);
}

int nearest_match (double x, int menu) {
	/* Need to search array for closest match */
	int n;
	int diff_idx = 0;
	char array_value_str[9];
	double array_value_db;
	double diff;

	/* Need a starting value for difference */
	switch(menu) {
		case 3:
			array_value_db = fraction_to_double(shutter_array[0]);
			break;
		case 4:
			strncpy(array_value_str, aperture_array[0]+2, 4);
			array_value_db = strtod(array_value_str, NULL);
			break;
	}
	diff = fabs(array_value_db - x);
	/* lots of repetition here but pointers to arrays seem to be a bad thing */


	switch(menu) {
		case 3:
			for ( n = 1; shutter_array[n] != NULL; ++n ) {

				array_value_db = fraction_to_double(shutter_array[n]);
				if (fabs(array_value_db - x) < diff) {
					diff_idx = n;
					diff = fabs(array_value_db - x);
				}











			}
			break;
		case 4:
			for ( n = 1; aperture_array[n] != NULL; ++n ) {
				strncpy(array_value_str, aperture_array[n]+2, 4);
				array_value_db = strtod(array_value_str, NULL);
				if (fabs(array_value_db - x) < diff) { 
					diff_idx = n;
					diff = fabs(array_value_db - x);
				}
			}
















			break;
	}
	return diff_idx;
}

double fraction_to_double(char *fraction) {
	double fraction_as_db;








>











>




>








>







 







|







 







|
>













|
>







 







|


|







|


|





>
>


<
>





>
>
>
>
>
>
>
>
>
>
>



|







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>








43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
..
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
...
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
...
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407

408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458

	"800",
	"1600",
	"3200",
	NULL
};

char *shutter_array[] = {
	"OVER",
	"1/1000",
	"1/500",
	"1/250",
	"1/125",
	"1/60",
	"1/30",
	"1/15",
	"1/8",
	"1/4",
	"1/2",
	"1",
	"UNDER",
	NULL
};

char *aperture_array[] = {
	"UNDER",
	"f/1.4",
	"f/2",
	"f/2.8",
	"f/4",
	"f/5.6",
	"f/8",
	"f/11",
	"f/16",
	"OVER",
	NULL
};

ITEM **exposure_items;
ITEM **iso_items;
ITEM **shutter_items;
ITEM **aperture_items;
................................................................................
void remove_menu(ITEM **items, MENU *men, int n);
void print_in_middle(WINDOW *win, int starty, int startx, int width, char *string, chtype color);
MENU *add_menu(char **array, ITEM **items, int n);
WINDOW *add_window(int xpos, char *title);
int exposure(int iso);
double shutter(int exposure, double aperture);
double aperture(int exposure, double shutter);
int nearest_match(double x, int menu, int n_array);
double fraction_to_double(char *fraction);
/* No one will ever need more than 9 bytes! */
char exposure_sel[9] = "";
char iso_sel[9] = "";
char shutter_sel[9] = "";
char aperture_sel[9] = "";
int selection_counter = 1;
................................................................................
							menu_driver(shutter_menu, REQ_SCR_UPAGE);
							menu_driver(shutter_menu, REQ_SCR_DPAGE);
							/* There is probably a nicer way to format the below */
							set_menu_pattern(
								shutter_menu,
								shutter_array[nearest_match(
									shutter(exposure(atoi(iso_sel)), strtod(aperture_sel_, NULL)),
									3,
									n_shutter
								)]
							);
							menu_driver(shutter_menu, REQ_DOWN_ITEM);
							menu_driver(shutter_menu, REQ_UP_ITEM);
							wrefresh(shutter_win);
						}
						if (strcmp("", aperture_sel) == 0) {
							menu_driver(aperture_menu, REQ_SCR_UPAGE);
							menu_driver(aperture_menu, REQ_SCR_DPAGE);
							set_menu_pattern(
								aperture_menu,
								aperture_array[nearest_match(
									aperture(exposure(atoi(iso_sel)), fraction_to_double(shutter_sel)),
									4,
									n_aperture
								)]
							);
							menu_driver(aperture_menu, REQ_DOWN_ITEM);
							menu_driver(aperture_menu, REQ_UP_ITEM);
							wrefresh(aperture_win);
						}
						/* clear the selections for next time */
................................................................................
}

double aperture (int exposure, double shutter) {
	/* EV = log2 (N^2/t) */
	return sqrt(pow(2, exposure) * shutter);
}

int nearest_match (double x, int menu, int n_array) {
	/* Need to search array for closest match */
	int n;
	int diff_idx = 1;
	char array_value_str[9];
	double array_value_db;
	double diff;

	/* Need a starting value for difference */
	switch(menu) {
		case 3:
			array_value_db = fraction_to_double(shutter_array[1]);
			break;
		case 4:
			strncpy(array_value_str, aperture_array[1]+2, 4);
			array_value_db = strtod(array_value_str, NULL);
			break;
	}
	diff = fabs(array_value_db - x);
	/* lots of repetition here but pointers to arrays seem to be a bad thing */
	/* Could do from n = 3 (2 above) until != under/over
	 * but also need to do something like if diff is more than twice max/min then under/over */
	switch(menu) {
		case 3:

			for ( n = 2; n < n_array-2; ++n ) {
				array_value_db = fraction_to_double(shutter_array[n]);
				if (fabs(array_value_db - x) < diff) {
					diff_idx = n;
					diff = fabs(array_value_db - x);
				}
			}
			/* Check if at extremities and then if under/over exposed */
			if (diff_idx == 1) {
				if (diff >= fraction_to_double(shutter_array[1])/2) { /* diff is greater than diff of next one down minus max/min */
					diff_idx = 0;
				}
			}
			if (diff_idx == n_array-3) {
				if (diff >= fraction_to_double(shutter_array[n_array-3])*2) {
					diff_idx = n_array-2;	
				}
			}
			break;
		case 4:
			for ( n = 2; n < n_array-2; ++n ) {
				strncpy(array_value_str, aperture_array[n]+2, 4);
				array_value_db = strtod(array_value_str, NULL);
				if (fabs(array_value_db - x) < diff) { 
					diff_idx = n;
					diff = fabs(array_value_db - x);
				}
			}
			/* Apertures similarly. Although progression is fiddlier.*/
			if (diff_idx == 1) {
				strncpy(array_value_str, aperture_array[1]+2, 4);
				array_value_db = strtod(array_value_str, NULL);
				if (diff >= array_value_db/sqrt(2.0)) { /* diff is greater than diff of next one down minus max/min */
					diff_idx = 0;
				}
			}
			if (diff_idx == n_array-3) {
				strncpy(array_value_str, aperture_array[n_array-3]+2, 4);
				array_value_db = strtod(array_value_str, NULL);
				if (diff >= array_value_db*sqrt(2.0)) {
					diff_idx = n_array-2;	
				}
			}

			break;
	}
	return diff_idx;
}

double fraction_to_double(char *fraction) {
	double fraction_as_db;

This page was generated in about 0.011s by Fossil 2.11.1 [307d94c549] 2020-06-08 19:48:29