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Buffered CGA refactor finish

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This commit is contained in:
churl
2022-05-20 16:15:43 +02:00
parent 80cbe0900d
commit 5e2196c898
5 changed files with 29 additions and 36 deletions
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20
c_os/devices/BufferedCGA.h
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@ -5,26 +5,32 @@
#include "devices/Keyboard.h"
#include "lib/ScrollbackBuffer.h"
// NOTE: I added this file
// NOTE: I added this file, I don't know if it will be used till the end but right know it's nice to have
// NOTE: I wanted to write to screen_buffer always and copy this to video mem to allow easier composition
// of different screen elements, but this would disable printing before initialization or I would
// have to replace print with unbuffered_print or something, which I don't like.
class BufferedCGA : public CGA {
private:
ScrollbackBuffer* scrollback_buffer;
bool initialized; // Don't do ScrollbackBuffer actions if not initialized
ScrollbackBuffer* scrollback_buffer; // Contains previous pages
CGA::cga_page_t* screen_buffer; // Contains the current page separately from the scrollback.
bool initialized; // Don't do ScrollbackBuffer actions if not initialized
BufferedCGA(const CGA& copy);
void display_scrollback(); // Write the current_page to CGA memory
BufferedCGA(const BufferedCGA&) = delete;
public:
BufferedCGA() : CGA(), initialized(false), scrollback(0) {};
~BufferedCGA() {
if (this->initialized) { delete this->scrollback_buffer; }
if (this->initialized) {
delete this->scrollback_buffer;
delete this->screen_buffer;
}
}
unsigned char scrollback; // The page that is displayed, public to enable page display
void init(unsigned int pages); // Scrollback needs to be initialized after memorymanagement
void display_scrollback(); // Write the current_page to CGA memory
void scroll_page_backward(); // Scroll up the page history
void scroll_page_forward(); // Scroll down the page history (to the current page)