43 lines
1.5 KiB
C++
Executable File
43 lines
1.5 KiB
C++
Executable File
#ifndef __SCROLLBACKBUFFER_INCLUDE_H_
|
|
#define __SCROLLBACKBUFFER_INCLUDE_H_
|
|
|
|
#include "devices/CGA.h"
|
|
#include "lib/MyStdLib.h"
|
|
#include <stddef.h>
|
|
|
|
// NOTE: I added this file
|
|
|
|
// The buffer dimensions must match with the destination dimensions
|
|
class ScrollbackBuffer {
|
|
private:
|
|
CGA::cga_page_t* buffer; // Circular buffer to store lines that left the screen
|
|
CGA::cga_page_t* pagebuffer; // Contains the current page separately from the scrollback.
|
|
// I thought this was easier since it also captures the little output
|
|
// generated before the scrollback buffer is initialized by accident
|
|
// (but only if it's less than a page)
|
|
unsigned int pos;
|
|
|
|
public:
|
|
const unsigned int pages; // Number of pages in buffer
|
|
const unsigned int rows; // Number of lines in buffer
|
|
|
|
ScrollbackBuffer(unsigned char rows, unsigned char pages)
|
|
: pos(0), pages(pages), rows(rows * pages) {
|
|
this->buffer = new CGA::cga_page_t[pages];
|
|
this->pagebuffer = new CGA::cga_page_t;
|
|
this->clear(); // Null out the buffer so no crap gets displayed
|
|
}
|
|
~ScrollbackBuffer() {
|
|
delete[] this->buffer;
|
|
delete this->pagebuffer;
|
|
}
|
|
|
|
void put(CGA::cga_line_t* line);
|
|
void get(CGA::cga_line_t* destination, unsigned char page) const;
|
|
void copy_from_pagebuffer(CGA::cga_page_t* destination) const;
|
|
void copy_to_pagebuffer(CGA::cga_page_t* source);
|
|
void clear();
|
|
};
|
|
|
|
#endif
|