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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include <string.h>
#include "bitmap.h"
#include "character.h"
#include "m.h"
#include "color.h"
#ifdef _DEBUG
#warning "Compiling with DEBUG"
#define DEBUG_PRINTF(...) { printf(__VA_ARGS__); }
#else
#define DEBUG_PRINTF(...) { }
#endif
#define CHAR_SIZE_X 2 //How many pixels should form one ASCII char?
#define CHAR_SIZE_Y (2 * CHAR_SIZE_X)
struct prog_param
{
char *filename;
char *character_map;
unsigned int charsize_x;
unsigned int charsize_y;
uint8_t color;
uint8_t use_stdin;
uint8_t use_whitespace;
uint8_t fit_width;
uint8_t dynamic_range;
};
struct prog_param parse_args(int argc, char *argv[]);
void print_help( void );
int main(int argc, char *argv[])
{
struct prog_param args = parse_args(argc, argv);
//Stores a luminance array
uint8_t **ascii_buff;
//Stores a color array
char* **col_buff;
uint8_t b_max = 0x00;
uint8_t b_min = 0xff;
struct bitmap_pixel_data bitmap;
bitmap = bitmap_read(args.filename);
if(bitmap.error) {
printf("Error reading file\n");
return 1;
}
//x and y size of ASCII-image
unsigned int size_x,size_y;
if(args.fit_width > 0) {
args.charsize_x = (unsigned int)((float)bitmap.x / (float)args.fit_width);
args.charsize_y = (unsigned int)(((float)bitmap.y / (float)bitmap.x) * (float)args.charsize_x * 2);
}
size_x = bitmap.x / args.charsize_x;
size_y = bitmap.y / args.charsize_y;
DEBUG_PRINTF("Output size: %u x %u\n", size_x, size_y);
//Allocate character sotrage
ascii_buff = malloc(sizeof(*ascii_buff) * size_x);
for (int i = 0; i < size_x; i++)
ascii_buff[i] = malloc(sizeof(ascii_buff[i]) * size_y);
//Allocate color storage if color enabled
if(args.color) {
col_buff = malloc(sizeof(*col_buff) * size_x);
for (int i = 0; i < size_x; i++)
col_buff[i] = malloc(sizeof(col_buff[i]) * size_y);
}
//Nest thine Lööps
//Very not optimal Variable names!!!!!!!!!!!!!
//
//For every size_x * size_y block: calculate average values of pixel blocks
for(unsigned int x = 0; x < size_x; x++) {
for(unsigned int y = 0; y < size_y; y++) {
uint8_t brightness [ args.charsize_x ][ args.charsize_y ]; //Average brightness of every pixel
uint8_t cc[ 3 ][ args.charsize_x * args.charsize_y ]; //RGB Values of Pixels
unsigned int cc_counter = 0;
//Iterate through Pixel block
for(unsigned int row_c = 0; row_c < args.charsize_y; row_c++) {
unsigned int row = y * args.charsize_y + row_c; //Actual position in Bitmap
for(unsigned int col_c = 0; col_c < args.charsize_x; col_c++) {
unsigned int col = x * args.charsize_x + col_c; //Actual position in bitmap
brightness[col_c][row_c] = rgb_avg(
bitmap.R[col][row],
bitmap.G[col][row],
bitmap.B[col][row]);
if(args.color) {
cc[0][cc_counter] = bitmap.R[col][row];
cc[1][cc_counter] = bitmap.G[col][row];
cc[2][cc_counter] = bitmap.B[col][row];
cc_counter++;
}//if
}//for col_c
}//for row_c
//Calculate average color / brightness
ascii_buff[x][y] = avg(args.charsize_x * args.charsize_y, *brightness);
if(args.color) {
if(args.use_whitespace)
col_buff[x][y] = calc_bg_col_ansi(
(uint8_t)avg(args.charsize_x * args.charsize_y, cc[0]),
(uint8_t)avg(args.charsize_x * args.charsize_y, cc[1]),
(uint8_t)avg(args.charsize_x * args.charsize_y, cc[2]));
else
col_buff[x][y] = calc_col_ansi(
(uint8_t)avg(args.charsize_x * args.charsize_y, cc[0]),
(uint8_t)avg(args.charsize_x * args.charsize_y, cc[1]),
(uint8_t)avg(args.charsize_x * args.charsize_y, cc[2]));
}
if((uint8_t)ascii_buff[x][y] < b_min)
b_min = ascii_buff[x][y];
if((uint8_t)ascii_buff[x][y] > b_max)
b_max = ascii_buff[x][y];
}//for y
}//for x
if(args.color)
printf("\e[0m");//Default colors
if(! args.dynamic_range) {
b_min = 0;
b_max = 255;
} else {
DEBUG_PRINTF("Dynamic Range: Brightness Values: Min: %u Max: %u\n", b_min, b_max);
}
//Print buffer
for(int y = 0; y<size_y; y++) {
for(int x = 0; x < size_x; x++) {
if(args.color)
printf("\e[%sm", col_buff[x][y]);
if(args.use_whitespace)
printf(" ");
else
printf("%c", calc_char(ascii_buff[x][y], b_min, b_max, args.character_map));
}
printf("\e[0m\n");
}
if(args.color)
printf("\e[0m");//Default colors
DEBUG_PRINTF("Finished!\n");
//Cleanup
for(int i = 0; i < size_x; i++)
free (ascii_buff[i]);
free(ascii_buff);
for(int i = 0; i < bitmap.x; i++) {
free(bitmap.R[i]);
free(bitmap.G[i]);
free(bitmap.B[i]);
}
free(bitmap.R);
free(bitmap.G);
free(bitmap.B);
/*
* NOTE Memory leaks bc every pixel-color is allocated as a single string.
* Since program is intended to terminate after a single run, 'free()' is left
* out for performance reasons.
if(args.color) {
for(int i = 0; i < size_x; i++)
free(col_buff[i]);
free(col_buff);
}*/
return 0;
}//main
struct prog_param parse_args(int argc, char *argv[])
{
struct prog_param ret;
memset(&ret, 0, sizeof ret);
ret.charsize_x = CHAR_SIZE_X;
for (int i = 1; i < argc; i++) {
if(argv[i][0] == '-') {
int icpy = i;
for(int o = 1; o < strlen(argv[icpy]); o++) {
switch(argv[icpy][o]) {
case 'h':
print_help();
exit(0);
break;
case 'x':
ret.charsize_x = atoi(argv[++i]);
break;
case 'y':
ret.charsize_y = atoi(argv[++i]);
break;
case 'c':
ret.color = 1;
break;
case 'i':
ret.use_stdin = 1;
break;
case 'w':
ret.use_whitespace = 1;
break;
case 's':
ret.fit_width = atoi(argv[++i]);
break;
case 'd':
ret.dynamic_range = 1;
break;
case 'm':
ret.character_map = argv[++i];
break;
default:
printf("Unrecognized Option '%c'\n", argv[icpy][o]);
print_help();
exit(1);
};//switch
}//for o
}//if
else if(ret.filename == NULL && !ret.use_stdin ) {
ret.filename = argv[i];
} else {
printf("Wrong number of arguments\n");
print_help();
exit(1);
}
}//for i
if(ret.filename == NULL && !ret.use_stdin )
{
printf("No input file. Use -i to read from stdin\n");
print_help();
exit(1);
}
if(!ret.charsize_y)
ret.charsize_y = 2 * ret.charsize_x;
return ret;
}
void print_help( void )
{
printf("ASCIIMap\n(c) 2019 Jonas Gunz, github.com/kompetenzbolzen/AsciiMap\n");
printf("ASCIIMap prints a ASCII representation of a bitmap image\n\nUsage: [OPTIONS] FILENAME\n");
printf("Options:\n -h: Print this help message\n -x VAL: set the width of block wich makes up one character. Default: %i\n", CHAR_SIZE_X);
printf(" -y VAL: set the height of block wich makes up one character. Default: 2*x\n -c: Print in ANSI color mode. Default: OFF\n");
printf(" -i: Read from STDIN instead of file.\n -w: print only whitespaces with background color\n");
printf(" -d: Dynamic brightness range\n -m PALETTE: specify custom character palette from darkest to brightest\n");
}
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