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#include "./memprint.h"
//Define global vars
u8 MEMPRINT_CURSORX=0;
u8 MEMPRINT_CURSORY=0;
u8 MEMPRINT_COLORS=0x0F;
//Move cursor
void memprint_updateCursor(){
//Update X axis
MEMPRINT_CURSORX++;
//Check X value
if(MEMPRINT_CURSORX >= MAXCURSORX){
//If X is out of the screen
MEMPRINT_CURSORX=0;
//Update Y
MEMPRINT_CURSORY++;
//Check Y value
if(MEMPRINT_CURSORY > MAXCURSORY){
//If Y is out of the screen
memprint_scrollUp(1);
//Decrease Y value
MEMPRINT_CURSORY--;
}
}
}
//Change character background color
void memprint_setBackground(colorBios color){
u8 newColor= (color << 4);
MEMPRINT_COLORS= newColor | ((MEMPRINT_COLORS << 4) >> 4);
}
//Change character color
void memprint_setForeground(colorBios color){
u8 newColor= color;
MEMPRINT_COLORS= newColor | ((MEMPRINT_COLORS >> 4) << 4);
}
//Print a char
void memprint_putChar(u8 character){
//Get the adresse with the cursor position
char *adress= ((char *) MEMPRINTSTARTADR) + (MEMPRINT_CURSORX * 2) + (MEMPRINT_CURSORY * MAXCURSORX * 2);
//Copy the character
*adress=character;
//Copy his attribute
adress++;
*adress=MEMPRINT_COLORS;
//Update cursor position
memprint_updateCursor();
}
//Print a char*
void memprint_print(char *str){
while(*str!=0x0){
memprint_putChar(*str);
str++;
}
}
//Clear the screen
void memprint_clear(){
memprint_scrollUp(MAXCURSORY);
}
//Scroll up "number" times
void memprint_scrollUp(u8 number){
//Get number of adress (char & his attribute) to scroll
int nbAdrToScroll=number*MAXCURSORX*2;
int i=0;
//Scroll all of the characters and attributes
for(i;i!=MAXCURSORX*2*MAXCURSORY;i++){
//Get source character or attribute
char* source=(((char *)MEMPRINTSTARTADR) + i);
//Get destination character or attribute
char* dest=source-nbAdrToScroll;
//Check if destination is out of the screen
if(dest >= (char *)MEMPRINTSTARTADR)
*dest=*source;
//Remove data from source
*source=0x0;
}
}
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