138 lines
2.5 KiB
C
138 lines
2.5 KiB
C
#include "terminal.h"
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#include <string.h>
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#define RESET_STR_LEN 7
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#define MAX_CH4_LEN 11
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usize TerminalMaxOut(usize wid, usize hgt)
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{
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return RESET_STR_LEN
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+ MAX_CH4_LEN * wid * hgt
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+ hgt
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+ 1;
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}
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bool CreateTerminal(struct Terminal *term, usize wid, usize hgt)
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{
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struct Char4 *ch4s = calloc(wid * hgt, sizeof(struct Char4));
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if (ch4s == nullptr)
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return false;
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char *str = malloc(TerminalMaxOut(wid, hgt));
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if (str == nullptr)
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return false;
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*term = (struct Terminal) {
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.buf = ch4s,
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.str = str,
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.wid = wid,
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.hgt = hgt
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};
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return true;
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}
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void FreeTerminal(struct Terminal *term)
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{
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free(term->buf);
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}
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usize u8_to_str(char *out, u8f x)
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{
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usize len = 1;
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if (x > 9) {
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u8f ones, tens;
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ones = x % 10;
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tens = x / 10;
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if (x > 99) {
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u8f hnds;
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tens %= 10;
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hnds = tens / 10;
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len = 3;
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out[0] = hnds + 48;
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out[1] = tens + 48;
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out[2] = ones + 48;
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} else {
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len = 2;
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out[0] = tens + 48;
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out[1] = ones + 48;
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}
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} else {
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out[0] = x + 48;
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}
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return len;
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}
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u8f ansi_bg(u8f bg)
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{
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return bg + (bg < 8 ? 40 : 92);
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}
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u8f ansi_fg(u8f fg)
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{
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return fg + (fg < 8 ? 30 : 82);
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}
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usize ch4_dif_to_str(char *out, struct Color4 *dif, struct Char4 *ch4)
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{
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usize len = 0;
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if (dif->bg != ch4->color.bg) {
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out[len++] = '\x1b';
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out[len++] = '[';
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len += u8_to_str(out + len, ansi_bg(ch4->color.bg));
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if (dif->fg != ch4->color.fg) {
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out[len++] = ';';
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len += u8_to_str(out + len, ansi_fg(ch4->color.fg));
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}
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out[len++] = 'm';
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} else if (dif->fg != ch4->color.fg) {
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out[len++] = '\x1b';
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out[len++] = '[';
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len += u8_to_str(out + len, ansi_fg(ch4->color.fg));
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out[len++] = 'm';
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}
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out[len++] = ch4->ch;
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*dif = ch4->color;
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return len;
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}
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usize TerminalPrint(struct Terminal *term)
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{
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struct Color4 dif = { 0, 0 };
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usize len = 7;
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memcpy(term->str, "\x1b[H\x1b[0m", 7);
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usize i = 0;
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for (usize y = 0; y < term->hgt; y++) {
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for (usize x = 0; x < term->wid; x++, i++) {
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struct Char4 *ch4 = &term->buf[i];
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// DEBUG
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if (ch4->ch == 0)
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ch4->ch = '#';
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// DEBUG
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len += ch4_dif_to_str(term->str + len, &dif, ch4);
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}
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term->str[len++] = '\n';
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}
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term->str[len] = 0;
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return len;
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} |