40 lines
1.5 KiB
C++
Executable File
40 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_line_t* buffer; // Circular buffer to store lines that left the screen
|
|
CGA::cga_page_t* pagebuffer; // Contains the current page separately from the scrollback
|
|
unsigned int current_linenumber;
|
|
|
|
CGA::cga_line_t* get_current_line() const; // Translate linenumber to memory location
|
|
void buffer_next_line(); // Moves the current_line one line forward
|
|
|
|
public:
|
|
const unsigned int pageheight, // Number of lines per page
|
|
pages, // Number of pages in buffer
|
|
lines; // Total number of lines in buffer
|
|
|
|
ScrollbackBuffer(unsigned char width, unsigned char height, unsigned char pages)
|
|
: current_linenumber(0), pageheight(height), pages(pages), lines(height * pages) {
|
|
this->buffer = new CGA::cga_line_t[lines];
|
|
this->pagebuffer = new CGA::cga_page_t;
|
|
this->clear(); // Null out the buffer so no crap gets displayed
|
|
}
|
|
|
|
void line_to_buffer(CGA::cga_line_t* line);
|
|
void copy_page_from_buffer(CGA::cga_line_t* destination, unsigned char page) const;
|
|
void copy_page_from_pagebuffer(CGA::cga_page_t* destination) const;
|
|
void copy_page_to_pagebuffer(CGA::cga_page_t* source);
|
|
void clear();
|
|
};
|
|
|
|
#endif
|