Commit 0353e6e

nsxiv0353e6e

Add support for changing the gamma value

Author: András Mohari
Date: 2013-11-13 20:54 +0100
Parent: 450c1ed
Commit: 0353e6eea265f5f6fa53eb75300529d9ffa6d4fa

+91 −3

9 files changed

Browse files Patch

−Context 3+

M commands.c +16 −0
M commands.h +1 −0
M config.def.h +11 −0
M image.c +30 −0
M image.h +5 −0
M main.c +2 −0
M options.c +12 −3
M options.h +1 −0
M sxiv.1 +13 −0

M commands.c View

M commands.h View

M config.def.h View

M image.c View

M image.h View

M main.c View

M options.c View

M options.h View

M sxiv.1 View

		@@ -474,6 +474,22 @@ bool i_toggle_antialias(arg_t a)
474	474		}
475	475		}
476	476
	477	+	/* a < 0: decrease gamma
	478	+	* a == 0: reset gamma
	479	+	* a > 0: increase gamma
	480	+	*/
	481	+	bool i_change_gamma(arg_t a)
	482	+	{
	483	+	if (mode == MODE_IMAGE) {
	484	+	long val = (long) a;
	485	+	int delta = val > 0 ? 1 : (val < 0 ? -1 : -img.gamma);
	486	+	img_set_gamma(&img, img.gamma + delta);
	487	+	return true;
	488	+	} else {
	489	+	return false;
	490	+	}
	491	+	}
	492	+
477	493		bool it_toggle_alpha(arg_t a)
478	494		{
479	495		img.alpha = tns.alpha = !img.alpha;

		@@ -67,6 +67,7 @@ bool i_fit_to_img(arg_t);
67	67		bool i_rotate(arg_t);
68	68		bool i_flip(arg_t);
69	69		bool i_toggle_antialias(arg_t);
	70	+	bool i_change_gamma(arg_t);
70	71		bool it_toggle_alpha(arg_t);
71	72		bool it_open_with(arg_t);
72	73		bool it_shell_cmd(arg_t);

		@@ -46,6 +46,12 @@ enum {
46	46		GIF_LOOP = 0 /* endless loop [0/1] */
47	47		};
48	48
	49	+	/* gamma correction: the user-visible ranges [-GAMMA_RANGE, 0] and
	50	+	* (0, GAMMA_RANGE] are mapped to the ranges [0, 1], and (1, GAMMA_MAX].
	51	+	* */
	52	+	static const double GAMMA_MAX = 10.0;
	53	+	static const int GAMMA_RANGE = 32;
	54	+
49	55		#endif
50	56		#ifdef _THUMBS_CONFIG
51	57
		@@ -141,6 +147,11 @@ static const keymap_t keys[] = {
141	147		{ false, XK_a, i_toggle_antialias, (arg_t) None },
142	148		{ false, XK_A, it_toggle_alpha, (arg_t) None },
143	149
	150	+	/* decrease/increase/reset gamma */
	151	+	{ false, XK_braceleft, i_change_gamma, (arg_t) -1 },
	152	+	{ false, XK_braceright, i_change_gamma, (arg_t) +1 },
	153	+	{ true, XK_G, i_change_gamma, (arg_t) 0 },
	154	+
144	155		/* open current image with given program: */
145	156		{ true, XK_g, it_open_with, (arg_t) "gimp" },
146	157

		@@ -67,6 +67,9 @@ void img_init(img_t img, win_t win)
67	67		img->alpha = !RENDER_WHITE_ALPHA;
68	68		img->multi.cap = img->multi.cnt = 0;
69	69		img->multi.animate = false;
	70	+
	71	+	img->cmod = imlib_create_color_modifier();
	72	+	img_set_gamma(img, options->gamma);
70	73		}
71	74
72	75		void exif_auto_orientate(const fileinfo_t *file)
		@@ -303,6 +306,8 @@ bool img_load(img_t img, const fileinfo_t file)
303	306		img_load_gif(img, file);
304	307		#endif
305	308
	309	+	img_set_gamma(img, img->gamma);
	310	+
306	311		img->w = imlib_image_get_width();
307	312		img->h = imlib_image_get_height();
308	313		img->scalemode = options->scalemode;
		@@ -335,6 +340,9 @@ void img_close(img_t *img, bool decache)
335	340		imlib_free_image();
336	341		img->im = NULL;
337	342		}
	343	+
	344	+	if (img->cmod)
	345	+	imlib_context_set_color_modifier(NULL);
338	346		}
339	347
340	348		void img_check_pan(img_t *img, bool moved)
		@@ -706,6 +714,28 @@ void img_toggle_antialias(img_t *img)
706	714		img->dirty = true;
707	715		}
708	716
	717	+	void img_set_gamma(img_t *img, int gamma)
	718	+	{
	719	+	if (img == NULL)
	720	+	return;
	721	+
	722	+	img->gamma = MIN(MAX(gamma, -GAMMA_RANGE), GAMMA_RANGE);
	723	+
	724	+	if (img->im && img->cmod) {
	725	+	if (img->gamma == 0) {
	726	+	imlib_context_set_color_modifier(NULL);
	727	+	} else {
	728	+	double range = img->gamma <= 0 ? 1.0 : GAMMA_MAX - 1.0;
	729	+	imlib_context_set_color_modifier(img->cmod);
	730	+	imlib_reset_color_modifier();
	731	+	imlib_modify_color_modifier_gamma(
	732	+	1.0 + (double) img->gamma
	733	+	* (range / (double) GAMMA_RANGE));
	734	+	}
	735	+	img->dirty = true;
	736	+	}
	737	+	}
	738	+
709	739		bool img_frame_goto(img_t *img, int n)
710	740		{
711	741		if (img == NULL \|\| img->im == NULL)

		@@ -55,6 +55,9 @@ typedef struct {
55	55		bool aa;
56	56		bool alpha;
57	57
	58	+	Imlib_Color_Modifier cmod;
	59	+	int gamma;
	60	+
58	61		multi_img_t multi;
59	62		} img_t;
60	63
		@@ -81,6 +84,8 @@ void img_flip(img_t*, flipdir_t);
81	84
82	85		void img_toggle_antialias(img_t*);
83	86
	87	+	void img_set_gamma(img_t*, int);
	88	+
84	89		bool img_frame_navigate(img_t*, int);
85	90		bool img_frame_animate(img_t*, bool);
86	91

		@@ -352,6 +352,8 @@ void update_info(void)
352	352		n += snprintf(rt + n, rlen - n, "%0*d/%d \| ",
353	353		fn, img.multi.sel + 1, img.multi.cnt);
354	354		}
	355	+	if (img.gamma != 0)
	356	+	n += snprintf(rt + n, rlen - n, "g%d \| ", img.gamma);
355	357		n += snprintf(rt + n, rlen - n, "%0*d/%d", fw, sel + 1, filecnt);
356	358		ow_info = info.script == NULL;
357	359		}

		@@ -33,7 +33,7 @@ const options_t options = (const options_t) &_options;
33	33
34	34		void print_usage(void)
35	35		{
36		−	printf("usage: sxiv [-bcdFfhioqrstvZ] [-g GEOMETRY] [-n NUM] "
	36	+	printf("usage: sxiv [-bcdFfhioqrstvZ] [-g GEOMETRY] [-G GAMMA] [-n NUM] "
37	37		"[-N name] [-z ZOOM] FILES...\n");
38	38		}
39	39
		@@ -44,7 +44,7 @@ void print_version(void)
44	44
45	45		void parse_options(int argc, char **argv)
46	46		{
47		−	int opt, t;
	47	+	int opt, t, gamma;
48	48
49	49		_options.from_stdin = false;
50	50		_options.to_stdout = false;
		@@ -53,6 +53,7 @@ void parse_options(int argc, char **argv)
53	53
54	54		_options.scalemode = SCALE_MODE;
55	55		_options.zoom = 1.0;
	56	+	_options.gamma = 0;
56	57
57	58		_options.fixed_win = false;
58	59		_options.fullscreen = false;
		@@ -64,7 +65,7 @@ void parse_options(int argc, char **argv)
64	65		_options.thumb_mode = false;
65	66		_options.clean_cache = false;
66	67
67		−	while ((opt = getopt(argc, argv, "bcdFfg:hin:N:oqrstvZz:")) != -1) {
	68	+	while ((opt = getopt(argc, argv, "bcdFfg:G:hin:N:oqrstvZz:")) != -1) {
68	69		switch (opt) {
69	70		case '?':
70	71		print_usage();
		@@ -87,6 +88,14 @@ void parse_options(int argc, char **argv)
87	88		case 'g':
88	89		_options.geometry = optarg;
89	90		break;
	91	+	case 'G':
	92	+	if (sscanf(optarg, "%d", &gamma) <= 0) {
	93	+	fprintf(stderr, "sxiv: invalid argument for option -G: %s\n",
	94	+	optarg);
	95	+	exit(EXIT_FAILURE);
	96	+	}
	97	+	_options.gamma = gamma;
	98	+	break;
90	99		case 'h':
91	100		print_usage();
92	101		exit(EXIT_SUCCESS);

		@@ -34,6 +34,7 @@ typedef struct {
34	34		/* image: */
35	35		scalemode_t scalemode;
36	36		float zoom;
	37	+	int gamma;
37	38
38	39		/* window: */
39	40		bool fixed_win;

		@@ -49,6 +49,9 @@ Set window position and size. See section GEOMETRY SPECIFICATIONS of X(7) for
49	49		more information on
50	50		.IR GEOMETRY .
51	51		.TP
	52	+	.BI "\-G " GAMMA
	53	+	Set gamma to GAMMA (-32..32).
	54	+	.TP
52	55		.BI "\-n " NUM
53	56		Start at picture number NUM.
54	57		.TP
		@@ -282,6 +285,16 @@ Flip image horizontally.
282	285		.TP
283	286		.B _
284	287		Flip image vertically.
	288	+	.SS Gamma Correction
	289	+	.TP
	290	+	.B {
	291	+	Decrease gamma.
	292	+	.TP
	293	+	.B }
	294	+	Increase gamma.
	295	+	.TP
	296	+	.B Ctrl-G
	297	+	Reset gamma.
285	298		.SS Miscellaneous
286	299		.TP
287	300		.B a

nsxiv/0353e6e

Add support for changing the gamma value

nsxiv0353e6e