138 lines
2.5 KiB
C
138 lines
2.5 KiB
C
#include <stdint.h>
|
|
#include "video.h"
|
|
|
|
static uint8_t * const video = (uint8_t*)0xB8000;
|
|
static uint8_t * currentVideo = (uint8_t*)0xB8000;
|
|
static const int width = 80;
|
|
static const int height = 25;
|
|
static int currentX = 0;
|
|
static int currentY = 0;
|
|
|
|
int limitX[2] = {0, 80};
|
|
int limitY[2] = {0, 25};
|
|
|
|
// char windowVideo = 1;
|
|
//
|
|
// void changeWindow() {
|
|
// windowVideo = 1 - windowVideo;
|
|
// moveToWindowVideo(windowVideo);
|
|
// }
|
|
//
|
|
// void moveToWindowVideo(char window) {
|
|
// if (window == -1) {
|
|
// windowVideo = -1;
|
|
// limitX[0] = 0;
|
|
// limitX[1] = 80;
|
|
// limitY[0] = 0;
|
|
// limitY[1] = 25;
|
|
// }
|
|
// if (window == 1) {
|
|
// windowVideo = 1;
|
|
// limitX[0] = 40;
|
|
// limitX[1] = 80;
|
|
// limitY[0] = 0;
|
|
// limitY[1] = 25;
|
|
// }
|
|
// if (window == 0) {
|
|
// windowVideo = 0;
|
|
// limitX[0] = 0;
|
|
// limitX[1] = 40;
|
|
// limitY[0] = 0;
|
|
// limitY[1] = 25;
|
|
// }
|
|
// currentX = limitX[0];
|
|
// currentY = limitY[0];
|
|
// }
|
|
|
|
void increment() {
|
|
currentX++;
|
|
if (currentX >= limitX[1]) {
|
|
currentY++;
|
|
currentX = limitX[0];
|
|
if (currentY >= limitY[1])
|
|
currentY = limitY[0];
|
|
}
|
|
}
|
|
|
|
int atoi(char * string, int length) {
|
|
int res = 0, i = 0;
|
|
while (i < length) {
|
|
res = res * 10 + string[i++] - '0';
|
|
}
|
|
return res;
|
|
}
|
|
|
|
// "\e\f" para clear
|
|
char checkIfEscapeSequence(const char * bufferAux) {
|
|
if (*bufferAux == '\e') {
|
|
bufferAux++;
|
|
if (*bufferAux == '\f') {
|
|
bufferAux++;
|
|
clear();
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int printStringLen(int color, const char * string, int maxLen) {
|
|
int i = 0;
|
|
|
|
while (*string != '\0' && i <= maxLen) {
|
|
if (currentX >= limitX[1]) {
|
|
currentX = limitX[0];
|
|
currentY++;
|
|
}
|
|
if (currentY >= limitY[1]) {
|
|
currentY = limitY[0];
|
|
}
|
|
|
|
if (*string == '\n') {
|
|
new_line();
|
|
return i;
|
|
}
|
|
else if (*string == '\b') {
|
|
backspace();
|
|
return i;
|
|
}
|
|
else if (checkIfEscapeSequence(string)) {
|
|
return i;
|
|
}
|
|
|
|
*(video + currentY * width * 2 + currentX * 2) = *string++;
|
|
*(video + currentY * width * 2 + currentX * 2 + 1) = color;
|
|
increment();
|
|
i++;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
void backspace() {
|
|
if (currentVideo > video) {
|
|
currentVideo -= 2;
|
|
*currentVideo = ' ';
|
|
currentX--;
|
|
if (currentX < limitX[0]) {
|
|
currentX = limitX[1];
|
|
if (currentY > limitY[0])
|
|
currentY--;
|
|
}
|
|
}
|
|
}
|
|
|
|
void new_line() {
|
|
currentX = limitX[0];
|
|
currentY++;
|
|
if (currentY == limitY[1])
|
|
currentY = limitY[0];
|
|
}
|
|
|
|
void clear() {
|
|
for (int i = limitX[0]; i < (limitX[1] - limitX[0]) * 2 * (limitY[1] - limitY[0]); i++) {
|
|
printStringLen(15, " ", 1);
|
|
}
|
|
|
|
currentX = limitX[0];
|
|
currentY = limitY[0];
|
|
} |