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