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hellwal.c
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/* hellwal - v1.0.3 - MIT LICENSE
*
* [ ] TODO: support for other OS's like Mac or Win
* ------------------------------------------------------------------------
* [x] TODO: tweaking options for generated colors (func + dark-light mode
* [x] TODO: bright & dark offset value as cmd line argument
* [x] TODO: support for already built themes (like gruvbox etc.)
* [x] TODO: do more pleasant color schemes
* [x] TODO: better light theme
* [x] TODO: print proper program usage
* [x] TODO: -r for random
* [x] TODO: -s for scripts
* [x] TODO: gen. colors
* [x] TODO: templating
* [x] TODO: parsing
*
* changelog v1.0.4:
* - changed visuals of color blocks - they are 3 spaces wide, it's more visible now
* - added --preview and --preview-small cmdline argument
* - added alpha variable, you can set alpha by providing it right after keyword in templates (e.g. "%% color1.hex alpha=0.5%%") - requested in issues by @chinh4thepro
* - added --skip-term-colors - it skips setting colors(printing escape codes) to the terminals - requested in issues by @SherLock707
* - separeted color related functions from hellwal.c into its own header only library
*
* changelog v1.0.3:
* - added --json (-j) mode - it prints colors in stdout in json format, REAMDE
* - fixed --help, I forgot to add some --cmdline args
* - new NEON MODE
* - added hellwm template
* - added fish template
* - changed: README typo
* - changed: Makefile - Fixed the order of compiler flags
* - changed: hellwal.c - Removed problematic free(pal) line
*
* changelog v1.0.2:
* - changed ~~arc4random()~~ to rand(), because it's not available on all platforms
* - changed rand() to ~~arc4random()~~
* - created palettes caching
* - added '--no-cache' cmd line argument
* - fixed applying addtional arguments for themes
*
* changelog v1.0.1:
* - fixed loading incorrect number of channels from image, this casued unmatched palette
* - added proper support for light mode
* - added --debug cmd line argument for more verbose output
* - added --dark-offset and --bright-offset cmd line arguments
* - added --inverted cmd line argument, it inverts color palette colors
* - added --color -c argument. Now we have 3 modes: dark, light and color
* - added --gray-scale argument to manipulate 'grayness' of color palette
* - added --static-background arg to set static background color
* - added --static-foreground arg to set static foreground color
*
* changelog v1.0.0:
* - first decent verision to release.
* - combined couple of ways into one for generating colorpalette
* - added bins to obtains more precise colors
* - fixed: half of palette is no more white randomly
* - get rid of unecessary functions
*
* ----------------------------------------------------------------------------------------------------
*
* changelog v0.0.7:
* - improved colors, gen_palette() function is re-designed (again)
* - changed wallpaper gen_palette algorithm to median cut
* - fixed some templates
*
* changelog v0.0.6:
* - improved colors, gen_palette() function is re-designed
* - added in ./assests example script how you can use hellwal
* - removed colors.sh
*
* changelog v0.0.5:
* - fixed .hex, .rgb while using keyword like (background, foreground etc.)
* - themes adjustments
* - added rgb template
* - changed directories errors to warn, to allow to use same variable as path
*
* changelog v0.0.4:
* - combined logging palletes into one
* - support for --random (pics random image or template from specified directory)
* - support for executing scripts after running hellwal
* - added terminal template, adjusted colors.sh
* - better --help
*
* changelog v0.0.3:
* - removed TEMPLATE_ARG, OUTPUT_NAME_ARG - I've come to conclusion that it's useless.
* - changed how 'variables' are parsed. Now index of colors ex. "color|0|.hex" is depracated. Use "color0.hex" instead.
* - added support for static themes, for example you can add gruvbox, catppuccin etc.
* - added THEME_ARG, THEME_FOLDER_ARG
* - added keyword "wallpaper" for wallpaper path.
* - added example themes in ./themes folder
*
* changelog v0.0.2:
* - actually working and better generated colorschemes
* - silent output: -q or --quiet
* - variable |w|, that recognized in templates returns IMAGE_ARG path
* - support for both light/dark mode
* - added more example templates
*/
#include <math.h>
#include <time.h>
#include <glob.h>
#include <fcntl.h>
#include <stdio.h>
#include <libgen.h>
#include <dirent.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#define HELL_PARSER_IMPLEMENTATION
#include "hell_parser.h"
#define HELL_COLORS_IMPLEMENTATION
#include "hell_colors.h"
/***
* MACROS
***/
/* just palette size */
#define PALETTE_SIZE 16
#define BINS 8
/* set default value for global char* variables */
#define SET_DEF(x, s) \
if (x == NULL) \
x = home_full_path(s); \
else \
x = home_full_path(x);
/***
* STRUCTURES
***/
/* IMG
*
* image structure that contains all image data,
* we need to create color palette
*/
typedef struct
{
/* With 3 channels it goes from 0 -> size:
* pixels[0] = Red;
* pixels[1] = Green;
* pixels[2] = Blue;
* pixels[3] = Red;
* .. And so on
*
* Also, we are using uint8_t instead of RGB structure
* here, only because I dont know how to do it.
*/
uint8_t *pixels;
size_t size; /* Size is width * height * channels(3) */
unsigned width;
unsigned height;
} IMG;
/* PALETTE
*
* stores all RGB colors */
typedef struct
{
RGB colors[PALETTE_SIZE];
} PALETTE;
/* TEMPLATE
*
* helps read and write and store processed buffer*/
typedef struct
{
char *name;
char *path;
char *content;
} TEMPLATE;
/* COLOR_TYPES - helps to manage colors within the code */
enum COLOR_TYPES { HEX_t, RGB_t };
/***
* GLOBAL VARIABLES
***/
/* these are being set in set_args() */
char HELLWAL_DELIM = '%';
char HELLWAL_DELIM_COUNT = 2;
/* image path, which will be used to create PALETTE */
char *IMAGE_ARG = NULL;
/* quiet arg, if NULL you will get verbose output,
* otherwise its going to print everthing normally
*/
char *QUIET_ARG = NULL;
/* if used, it will skip
* setting colors to terminals */
char *SKIP_TERM_COLORS = NULL;
/* darkmode, lightmode and colormode - darkmode is default */
char *DARK_ARG = NULL;
char *LIGHT_ARG = NULL;
char *COLOR_ARG = NULL;
/* folder that contains templates */
char *TEMPLATE_FOLDER_ARG = NULL;
/*
* output folder for generated templates,
* default one is in ~/.cache/hellwal/
*/
char *OUTPUT_ARG = NULL;
/* ouputs json formatted colors to stdout,
* without using templates.
* https://www.reddit.com/r/unixporn/comments/1h9aawb/comment/m12o2og/
*/
char *JSON_ARG = NULL;
/* name of theme in THEME_FOLDER_ARG,
* or (in case was not found) path to file */
char *THEME_ARG = NULL;
/* folder that contains static themes */
char *THEME_FOLDER_ARG = NULL;
/* pick random THING (image or theme) of provided folder path:
* - provide path to IMG using *IMAGE_ARG
* - or *THEME_FOLDER_ARG
*/
char *RANDOM_ARG = NULL;
/* enables more verbose output, to see what's going on */
char *DEBUG_ARG = NULL;
/* run script after successfull hellwal job */
char *SCRIPT_ARG = NULL;
/* do not cache palette, do not read cached palettes */
char *NO_CACHE_ARG = NULL;
/* invert color palette colors */
char *INVERT_ARG = NULL;
/* neon-like color palette colors */
char *NEON_MODE_ARG = NULL;
/* Set Static Background colors */
RGB *STATIC_BG_ARG = NULL;
/* Set Static Foreground colors */
RGB *STATIC_FG_ARG = NULL;
/* defines 'grayness' of colorpalette */
float GRAY_SCALE_ARG = -1;
/* defines offsets to manipulate darkness and brightness */
float BRIGHTNESS_OFFSET_ARG = -1;
float DARKNESS_OFFSET_ARG = -1;
float OFFSET_GLOBAL = 0;
/* default color template to save cached themes */
char *CACHE_TEMPLATE = "\
\\%\\%wallpaper = %% wallpaper %% \\%\\%\n\
\
\\%\\%background = #%% background %% \\%\\%\n\
\\%\\%foreground = #%% foreground %% \\%\\%\n\
\\%\\%cursor = #%% cursor %% \\%\\%\n\
\\%\\%border = #%% border %% \\%\\%\n\
\
\\%\\%color0 = #%% color0.hex %% \\%\\%\n\
\\%\\%color1 = #%% color1.hex %% \\%\\%\n\
\\%\\%color2 = #%% color2.hex %% \\%\\%\n\
\\%\\%color3 = #%% color3.hex %% \\%\\%\n\
\\%\\%color4 = #%% color4.hex %% \\%\\%\n\
\\%\\%color5 = #%% color5.hex %% \\%\\%\n\
\\%\\%color6 = #%% color6.hex %% \\%\\%\n\
\\%\\%color7 = #%% color7.hex %% \\%\\%\n\
\\%\\%color8 = #%% color8.hex %% \\%\\%\n\
\\%\\%color9 = #%% color9.hex %% \\%\\%\n\
\\%\\%color10 = #%% color10.hex %% \\%\\%\n\
\\%\\%color11 = #%% color11.hex %% \\%\\%\n\
\\%\\%color12 = #%% color12.hex %% \\%\\%\n\
\\%\\%color13 = #%% color13.hex %% \\%\\%\n\
\\%\\%color14 = #%% color14.hex %% \\%\\%\n\
\\%\\%color15 = #%% color15.hex %% \\%\\%\n";
/* default color template to save cached themes */
char *JSON_TEMPLATE =
"{\n"
" \"wallpaper\": \"%% wallpaper %%\",\n"
" \"alpha\": \"100\",\n"
" \"special\": {\n"
" \"background\": \"#%% background %%\",\n"
" \"foreground\": \"#%% foreground %%\",\n"
" \"cursor\": \"#%% cursor %%\",\n"
" \"border\": \"#%% border %%\"\n"
" },\n"
" \"colors\": {\n"
" \"color0\": \"#%% color0.hex %%\",\n"
" \"color1\": \"#%% color1.hex %%\",\n"
" \"color2\": \"#%% color2.hex %%\",\n"
" \"color3\": \"#%% color3.hex %%\",\n"
" \"color4\": \"#%% color4.hex %%\",\n"
" \"color5\": \"#%% color5.hex %%\",\n"
" \"color6\": \"#%% color6.hex %%\",\n"
" \"color7\": \"#%% color7.hex %%\",\n"
" \"color8\": \"#%% color8.hex %%\",\n"
" \"color9\": \"#%% color9.hex %%\",\n"
" \"color10\": \"#%% color10.hex %%\",\n"
" \"color11\": \"#%% color11.hex %%\",\n"
" \"color12\": \"#%% color12.hex %%\",\n"
" \"color13\": \"#%% color13.hex %%\",\n"
" \"color14\": \"#%% color14.hex %%\",\n"
" \"color15\": \"#%% color15.hex %%\"\n"
" }\n"
"}\n";
/***
* FUNCTIONS DECLARATIONS
***/
/* args */
int set_args(int argc, char *argv[]);
/* utils */
float clamp_float(float value, float min, float max);
int is_between_01_float(const char *str);
int _compare_luminance_qsort(const void *a, const void *b);
char *rand_file(char *path);
char *home_full_path(const char* path);
void check_output_dir(char *path);
void remove_whitespaces(char *str);
void run_script(const char *script);
void hellwal_usage(const char *name);
void remove_extra_whitespaces(char *str);
/* logging */
void eu(const char *format, ...);
void err(const char *format, ...);
void warn(const char *format, ...);
void log_c(const char *format, ...);
/* IMG */
IMG *img_load(char *filename);
void img_free(IMG *img);
/* color related stuff */
int hex_to_rgb(const char *hex, RGB *p);
int get_channel(RGB *colors, size_t start, size_t end, int channel);
int is_color_too_similar(RGB *palette, int num_colors, RGB new_color);
RGB apply_offsets(RGB c);
RGB apply_grayscale(RGB c);
RGB bin_to_color(int r_bin, int g_bin, int b_bin);
RGB average_color(IMG *img, size_t start, size_t end);
void print_color(RGB c);
void print_term_colors();
void print_term_colors_small();
void median_cut(RGB *colors, size_t *starts, size_t *ends, size_t *num_boxes, size_t target_boxes);
/* term, set for all active terminals ANSI escape codes */
void set_term_colors(PALETTE pal);
/* palettes */
PALETTE gen_palette(IMG *img);
PALETTE get_color_palette(PALETTE p);
int is_color_palette_var(char *name);
int check_cached_palette(char *filepath, PALETTE *p);
void palette_write_cache(char *filepath, PALETTE *p);
char *process_variable_alpha(char *color, char *value, enum COLOR_TYPES type);
char *palette_color(PALETTE pal, unsigned c, enum COLOR_TYPES type);
char *process_addtional_variables(char *color, char *right_token, enum COLOR_TYPES type);
void invert_palette(PALETTE *p);
void print_palette(PALETTE pal);
void reverse_palette(PALETTE *palette);
void palette_handle_neon_mode(PALETTE *p);
void palette_handle_dark_mode(PALETTE *p);
void palette_handle_light_mode(PALETTE *p);
void palette_handle_color_mode(PALETTE *p);
void apply_addtional_arguments(PALETTE *p);
void sort_palette_by_luminance(PALETTE *palette);
/* templates */
char *load_file(char *filename);
void process_templating(PALETTE pal);
size_t template_write(TEMPLATE *t, char *dir);
void process_template(TEMPLATE *t, PALETTE pal);
TEMPLATE **get_template_structure_dir(const char *dir_path, size_t *_size);
/* themes */
char *load_theme(char *themename);
PALETTE process_themeing(char *theme);
int process_theme(char *t, PALETTE *pal);
/***
* FUNCTIONS DECLARATIONS
***/
/* prints usage to stdout */
void hellwal_usage(const char *name)
{
printf("Usage:\n");
printf(" %s -i <image> [OPTIONS]\n\n", name);
printf("Options:\n");
printf(" -i, --image <image> Set image file\n");
printf(" -d, --dark Set dark mode (default)\n");
printf(" -l, --light Set light mode\n");
printf(" -c, --color Enable colorized mode (experimental)\n");
printf(" -v, --invert Invert colors in the palette\n");
printf(" -m, --neon-mode Enhance colors for a neon effect\n");
printf(" -r, --random Pick random image or theme\n");
printf(" -q, --quiet Suppress output\n");
printf(" -j, --json Prints colors to stdout in json format, it's skipping templates\n");
printf(" -s, --script <script> Execute script after running hellwal\n");
printf(" -f, --template-folder <dir> Set folder containing templates\n");
printf(" -o, --output <dir> Set output folder for generated templates\n");
printf(" -t, --theme <file> Set theme file or name\n");
printf(" -k, --theme-folder <dir> Set folder containing themes\n");
printf(" -g, --gray-scale <value> Apply grayscale filter (0-1) (float)\n");
printf(" -n, --dark-offset <value> Adjust darkness offset (0-1) (float)\n");
printf(" -b, --bright-offset <value> Adjust brightness offset (0-1) (float)\n");
printf(" --preview Preview current terminal colorscheme\n");
printf(" --preview-small Preview current terminal colorscheme - small factor\n");
printf(" --debug Enable debug mode\n");
printf(" --no-cache Disable caching\n");
printf(" --skip-term-colors Skip setting colors to the terminal\n");
printf(" --static-background \"#hex\" Set static background color\n");
printf(" --static-foreground \"#hex\" Set static foreground color\n");
printf(" -h, --help Display this help and exit\n\n");
printf("Defaults:\n");
printf(" Template folder: ~/.config/hellwal/templates\n");
printf(" Theme folder: ~/.config/hellwal/themes\n");
printf(" Output folder: ~/.cache/hellwal/\n\n");
}
/* set given arguments */
int set_args(int argc, char *argv[])
{
int j = 0; /* 'int i' from for loop counter to track incomplete option error */
for (int i = 1; i < argc; i++)
{
j = i;
if (strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "-h") == 0)
{
hellwal_usage(argv[0]);
exit(EXIT_SUCCESS);
}
else if ((strcmp(argv[i], "--image") == 0 || strcmp(argv[i], "-i") == 0))
{
if (i + 1 < argc)
IMAGE_ARG = argv[++i];
else {
argc = -1;
}
}
else if ((strcmp(argv[i], "--dark") == 0 || strcmp(argv[i], "-d") == 0))
{
/* anything other than NULL, makes dark mode */
DARK_ARG = "";
}
else if ((strcmp(argv[i], "--light") == 0 || strcmp(argv[i], "-l") == 0))
{
LIGHT_ARG = "";
}
else if ((strcmp(argv[i], "--color") == 0 || strcmp(argv[i], "-c") == 0))
{
COLOR_ARG = "";
}
else if ((strcmp(argv[i], "--invert") == 0 || strcmp(argv[i], "-v") == 0))
{
INVERT_ARG = "";
}
else if ((strcmp(argv[i], "--neon-mode") == 0 || strcmp(argv[i], "-m") == 0))
{
NEON_MODE_ARG = "";
}
else if ((strcmp(argv[i], "--random") == 0 || strcmp(argv[i], "-r") == 0))
{
RANDOM_ARG = "";
}
else if ((strcmp(argv[i], "--json") == 0 || strcmp(argv[i], "-j") == 0))
{
JSON_ARG = "";
QUIET_ARG = "";
}
else if ((strcmp(argv[i], "--quiet") == 0 || strcmp(argv[i], "-q") == 0))
{
QUIET_ARG = "";
}
else if (strcmp(argv[i], "--skip-term-colors") == 0)
{
SKIP_TERM_COLORS = "";
}
else if (strcmp(argv[i], "--debug") == 0)
{
DEBUG_ARG = "";
}
else if (strcmp(argv[i], "--preview") == 0)
{
print_term_colors();
exit(EXIT_SUCCESS);
}
else if (strcmp(argv[i], "--preview-small") == 0)
{
print_term_colors_small();
exit(EXIT_SUCCESS);
}
else if (strcmp(argv[i], "--no-cache") == 0)
{
NO_CACHE_ARG = "";
}
else if ((strcmp(argv[i], "--template-folder") == 0 || strcmp(argv[i], "-f") == 0))
{
if (i + 1 < argc)
TEMPLATE_FOLDER_ARG = argv[++i];
else {
argc = -1;
}
}
else if ((strcmp(argv[i], "--output") == 0 || strcmp(argv[i], "-o") == 0))
{
if (i + 1 < argc)
OUTPUT_ARG = argv[++i];
else {
argc = -1;
}
}
else if ((strcmp(argv[i], "--theme") == 0 || strcmp(argv[i], "-t") == 0))
{
if (i + 1 < argc)
THEME_ARG = argv[++i];
else {
argc = -1;
}
}
else if ((strcmp(argv[i], "--theme-folder") == 0 || strcmp(argv[i], "-k") == 0))
{
if (i + 1 < argc)
THEME_FOLDER_ARG = argv[++i];
else {
argc = -1;
}
}
else if ((strcmp(argv[i], "--script") == 0 || strcmp(argv[i], "-s") == 0))
{
if (i + 1 < argc)
SCRIPT_ARG = argv[++i];
else
argc = -1;
}
else if ((strcmp(argv[i], "--dark-offset") == 0 || strcmp(argv[i], "-n") == 0))
{
if (i + 1 < argc)
{
if (is_between_01_float(argv[++i]))
DARKNESS_OFFSET_ARG = strtod(argv[i], NULL);
else
warn("Dark offset value have to be floating point number between 0-1!, skipping argument.");
}
else
argc = -1;
}
else if ((strcmp(argv[i], "--bright-offset") == 0 || strcmp(argv[i], "-b") == 0))
{
if (i + 1 < argc)
{
if (is_between_01_float(argv[++i]))
BRIGHTNESS_OFFSET_ARG = strtod(argv[i], NULL);
else
warn("Bright offset value have to be floating point number between 0-1!, skipping argument.");
}
else
argc = -1;
}
else if ((strcmp(argv[i], "--gray-scale") == 0 || strcmp(argv[i], "-g") == 0))
{
if (i + 1 < argc)
{
if (is_between_01_float(argv[++i]))
GRAY_SCALE_ARG = strtod(argv[i], NULL);
else
warn("Grayscale value have to be floating point number between 0-1!, skipping argument.");
}
else
argc = -1;
}
else if (strcmp(argv[i], "--static-background") == 0)
{
if (i + 1 < argc)
{
STATIC_BG_ARG = calloc(1, sizeof(RGB));
if (!hex_to_rgb(argv[++i], STATIC_BG_ARG))
{
free(STATIC_BG_ARG);
err("Failed to parse static background: %s", argv[i-1]);
}
}
else
{
argc = -1;
}
}
else if (strcmp(argv[i], "--static-foreground") == 0)
{
if (i + 1 < argc)
{
STATIC_FG_ARG = calloc(1, sizeof(RGB));
if (!hex_to_rgb(argv[++i], STATIC_FG_ARG))
{
free(STATIC_FG_ARG);
err("Failed to parse static foreground: %s", argv[i-1]);
}
}
else
{
argc = -1;
}
}
else {
eu("Unknown option: %s", argv[i]);
}
}
if (argc == -1)
err("Incomplete option: %s", argv[j]);
/* handle needed arguments and warns - idk how to do this the other way */
if (RANDOM_ARG != NULL && (THEME_FOLDER_ARG == NULL && IMAGE_ARG == NULL))
err("you have to specify --image to provide image folder or --theme-folder to use RANDOM");
if (IMAGE_ARG == NULL && THEME_ARG == NULL && ((THEME_FOLDER_ARG == NULL || TEMPLATE_FOLDER_ARG == NULL) && RANDOM_ARG == NULL))
err("You have to provide image file or theme!: --image, --theme, \n\t");
if ((THEME_ARG != NULL || THEME_FOLDER_ARG != NULL) && IMAGE_ARG != NULL)
{
if (THEME_FOLDER_ARG != NULL)
err("you cannot use both --image and --theme-folder");
else
err("you cannot use both --image and --theme");
}
if (RANDOM_ARG != NULL && THEME_ARG != NULL)
warn("specified theme is not used: \"%s\"", THEME_ARG);
if (THEME_ARG == NULL && THEME_FOLDER_ARG != NULL && RANDOM_ARG == NULL)
warn("specified theme folder is not used: \"%s\", you also have to provide --theme", THEME_FOLDER_ARG);
/* if RANDOM, get file */
if (RANDOM_ARG != NULL)
{
if (IMAGE_ARG != NULL)
IMAGE_ARG = rand_file(IMAGE_ARG);
else
THEME_ARG = rand_file(THEME_FOLDER_ARG);
}
/* set offset values - you can provide both, but they will interfier with each other */
if (DARKNESS_OFFSET_ARG != -1)
OFFSET_GLOBAL -= DARKNESS_OFFSET_ARG;
if (BRIGHTNESS_OFFSET_ARG != -1)
OFFSET_GLOBAL += BRIGHTNESS_OFFSET_ARG;
/* If not specified, set default ones */
SET_DEF(OUTPUT_ARG, "~/.cache/hellwal/");
SET_DEF(THEME_FOLDER_ARG , "~/.config/hellwal/themes");
SET_DEF(TEMPLATE_FOLDER_ARG, "~/.config/hellwal/templates");
return 0;
}
// prints current terminal colors
void print_term_colors()
{
for (int i = 0; i < PALETTE_SIZE; i++)
{
// set foreground color
printf("\033[38;5;%dm", i);
printf(" FG %2d ", i);
// reset and set background color
printf("\033[0m");
printf("\033[48;5;%dm", i);
printf(" BG %2d ", i);
// reset again
printf("\033[0m\n");
}
printf("\n");
print_term_colors_small();
// reset at the end
printf("\033[0m\n");
}
void print_term_colors_small()
{
for (int i=0; i<PALETTE_SIZE; i++)
{
if (i == PALETTE_SIZE/2)
printf("\n");
//printf("\033[38;5;%dm", i); // if you want to set foreground color
printf("\033[48;5;%dm", i); // if you want to set background color
printf(" "); // two spaces as a "block" of a color
}
// reset at the end
printf("\033[0m\n");
}
/* Writes color as block to stdout - it does not perform new line by itself */
void print_color(RGB col)
{
if (QUIET_ARG != NULL)
return;
char *color_block = " "; // color_block is 3 spaces wide
// color_block + ↓↓↓↓↓↓
/* Write color from as colored block */
fprintf(stdout, "\x1b[48;2;%d;%d;%dm%s\033[0m", col.R, col.G, col.B, color_block);
}
/*
* prints to stderr formatted output and exits with EXIT_FAILURE,
* also prints hellwal_usage()
*/
void eu(const char *format, ...)
{
fprintf(stderr, "\033[91m[ERROR]: ");
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
fprintf(stderr, "\033[0m\n");
hellwal_usage("hellwal");
exit(EXIT_FAILURE);
}
/* prints to stderr formatted output and exits with EXIT_FAILURE */
void err(const char *format, ...)
{
/*
* ignores QUIET_ARG
*
if (QUIET_ARG != NULL)
return;
*/
va_list ap;
va_start(ap, format);
fprintf(stderr, "\033[91m[ERROR]: ");
vfprintf(stderr, format, ap);
fprintf(stderr, "\033[0m");
va_end(ap);
fprintf(stderr, "\n");
exit(EXIT_FAILURE);
}
/* prints to stderr formatted output, but not exits */
void warn(const char *format, ...)
{
if (QUIET_ARG != NULL)
return;
va_list ap;
va_start(ap, format);
fprintf(stderr, "\033[93m[WARN]: ");
vfprintf(stderr, format, ap);
fprintf(stderr, "\033[0m");
va_end(ap);
fprintf(stderr, "\n");
}
/* prints formatted output to stdout with colors */
void log_c(const char *format, ...)
{
if (QUIET_ARG != NULL)
return;
va_list ap;
va_start(ap, format);
const char *default_color = "\033[96m";
fprintf(stdout, "%s[INFO]: ", default_color);
vfprintf(stdout, format, ap);
fprintf(stdout, "\033[0m");
va_end(ap);
fprintf(stdout, "\n");
}
/* get full path from '~/' or other relative paths */
char* home_full_path(const char* path)
{
if (path[0] == '~')
{
const char* home = getenv("HOME");
if (home)
{
char* full_path = malloc(strlen(home) + strlen(path) + 1);
if (full_path)
{
sprintf(full_path, "%s%s", home, path + 1);
return full_path;
}
}
}
return strdup(path);
}
/*
* checks if output directory exists,
* if not creates it
*/
void check_output_dir(char *path)
{
struct stat st;
if (stat(path, &st) == -1)
mkdir(path, 0700);
}
/* run script from given path */
void run_script(const char *script)
{
if (script == NULL)
return;
log_c("Starting script: %s", script);
size_t exit_code = system(script);
if (exit_code == 0)
log_c("Script \"%s\" exited with code: %d", script, exit_code);
else
err("Script \"%s\" exited with code: %d", script, exit_code);
}
/* avoid exceeding max value for float */
float clamp_float(float value, float min, float max)
{
return value < min ? min : (value > max ? max : value);
}
/* get random file from given path */
char *rand_file(char *path)
{
DIR *dir = opendir(path);
if (dir == NULL)
err("Cannot access directory %s: ", path);
struct dirent *entry;
char **files = NULL;
size_t count = 0;
while ((entry = readdir(dir)) != NULL) {
if (entry->d_type == DT_REG)
{
files = realloc(files, sizeof(char *) * (count + 1));
if (files == NULL)
{
perror("Memory allocation failed");
closedir(dir);
return NULL;
}
files[count++] = strdup(entry->d_name);
}
}
closedir(dir);
if (count == 0) {
free(files);
err("No files found in directory: %s\n", path);
}
srand((unsigned int)(time(NULL) ^ getpid()));
size_t r_idx = rand() % count;
char *choosen = calloc(1, strlen(path) + strlen(files[r_idx]) + 2);
sprintf(choosen, "%s/%s", path, strdup(files[r_idx]));
for (size_t i = 0; i < count; i++)
free(files[i]);
free(files);
return choosen;
}
/* removes whitespaces from buffer */
void remove_whitespaces(char *str)
{
if (!str) return;
char *read = str;
char *write = str;
while (*read) {
if (*read != ' ' && *read != '\t' && *read != '\n' && *read != '\r') {
*write++ = *read;
}
read++;
}
*write = '\0';
}
/* make sure that buffer does not
* start or ends with space, and
* only occurs once between characters
*/
void remove_extra_whitespaces(char *str)
{
int read = 0, write = 0;
int space_found = 0;
while (str[read] == ' ' || str[read] == '\t' || str[read] == '\n' || str[read] == '\r') read++;
while (str[read])
{
if (str[read] == ' ' || str[read] == '\t' || str[read] == '\n' || str[read] == '\r')
{
if (!space_found)
{
str[write++] = ' ';
space_found = 1;
}
}
else
{
str[write++] = str[read];
space_found = 0;
}
read++;
}
if (write > 0 && str[write - 1] == ' ')
{
write--;
}
str[write] = '\0';
}
int is_between_01_float(const char *str)
{
char *end;
double number = strtod(str, &end);
if (*end != '\0')
return 0;
return (number >= 0.0 && number <= 1.0);
}
int _compare_luminance_qsort(const void *a, const void *b)
{
RGB *color_a = (RGB *)a;
RGB *color_b = (RGB *)b;
if (color_a == NULL || color_b == NULL) return 1;
return compare_luminance(*color_a, *color_b);
}
/* sort palette by luminance to spread out colors */
void sort_palette_by_luminance(PALETTE *palette)
{
qsort(palette->colors, PALETTE_SIZE/2, sizeof(RGB), _compare_luminance_qsort);
}
/* function to reverse the palette, used when light mode is specified */
void reverse_palette(PALETTE *palette)
{
for (int i = 0; i < PALETTE_SIZE / 2; i++)
{
RGB temp = palette->colors[i];
palette->colors[i] = palette->colors[PALETTE_SIZE - 1 - i];