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cleanup cga

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This commit is contained in:
Christoph Urlacher
2022-07-23 21:51:29 +02:00
parent 94cc244868
commit 226a247043
3 changed files with 33 additions and 29 deletions
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27
c_os/devices/CGA.h
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@ -15,23 +15,21 @@
#define __CGA_include__
#include "kernel/IOport.h"
#include "user/lib/Array.h"
class CGA {
private:
IOport index_port; // Auswahl eines Register der Grafikkarte
IOport data_port; // Lese-/Schreib-Zugriff auf Register der Grafikk.
// Copy Konstrutkor unterbinden
CGA(const CGA& copy) = delete;
IOport index_port; // Auswahl eines Register der Grafikkarte
IOport data_port; // Lese-/Schreib-Zugriff auf Register der Grafikk.
public:
// NOTE: I change CGA_START to this const because I think the address should be constant and macro-like,
// not the data at this address (we want that data to change).
static const unsigned int CGA_START = 0xb8000U;
// Konstruktur mit Initialisierung der Ports
CGA() : index_port(0x3d4), data_port(0x3d5) {
// NOTE: I added this
this->setpos(0, 0);
}
@ -62,29 +60,32 @@ public:
enum { ROWS = 25,
COLUMNS = 80 };
// NOTE: I added this
// Easier access to memory (also easier copying of lines/pages etc)
typedef struct {
char cga_char;
unsigned char cga_attribute;
} cga_char_t;
typedef struct {
cga_char_t cga_line[COLUMNS];
// Can use these arrays since they don't have memory overhead (except for the methods that are elsewhere)
bse::array<cga_char_t, COLUMNS> cga_line;
} cga_line_t;
typedef struct {
cga_line_t cga_page[ROWS];
bse::array<cga_line_t, ROWS> cga_page;
} cga_page_t;
// Setzen des Cursors in Spalte x und Zeile y.
void setpos(int x, int y);
void setpos(unsigned int x, unsigned int y);
// Abfragen der Cursorpostion
void getpos(int& x, int& y) const;
void getpos(unsigned int& x, unsigned int& y) const;
// Anzeige eines Zeichens mit Attribut an einer bestimmten Stelle
void show(int x, int y, char character, unsigned char attrib = STD_ATTR);
static void show(unsigned int x, unsigned int y, char character, unsigned char attrib = STD_ATTR);
// Anzeige mehrerer Zeichen ab der aktuellen Cursorposition
virtual void print(char* string, int n, unsigned char attrib = STD_ATTR);
virtual void print(char* string, unsigned int n, unsigned char attrib = STD_ATTR);
// Verschiebt den Bildschirminhalt um eine Zeile nach oben.
// Neue Zeile am unteren Bildrand mit Leerzeichen fuellen