132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
#include <debugio.h>
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#include <memory.h>
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#include <stdio.h>
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uint8* VideoPtr = (uint8*) 0xb8000;
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Point ConsoleCursor = {0, 0};
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UPoint ConsoleSize = {80, 25};
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uint8 ConsoleDefaultColor = CONSOLE_DEFAULT_COLOR;
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/**************************************
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* Basic console operations *
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**************************************/
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void ConsoleClear()
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{
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uint32 temp;
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for (temp = 0; temp < ConsoleSize.X * ConsoleSize.Y; temp++)
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{
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VideoPtr[2 * temp] = 0;
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VideoPtr[2 * temp + 1] = ConsoleDefaultColor;
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}
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ConsoleCursor.X = ConsoleCursor.Y = 0;
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ConsoleCursorUpdateHardware();
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}
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void ConsoleScroll (uint32 lines)
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{
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// Sanity check, don't scroll too much
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if (lines > ConsoleSize.Y) lines = ConsoleSize.Y;
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uint32 x, y;
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for (y = 0; y < ConsoleSize.Y - lines; y++)
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for (x = 0; x < 2*ConsoleSize.X; x++)
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VideoPtr[y * ConsoleSize.X * 2 + x] = VideoPtr[(y+lines)*ConsoleSize.X*2 + x];
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for (y = ConsoleSize.Y - lines; y < ConsoleSize.Y; y++)
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for (x = 0; x < ConsoleSize.X; x++)
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{
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VideoPtr[2 * (y * ConsoleSize.X + x)] = 0;
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VideoPtr[2 * (y * ConsoleSize.X + x) + 1] = ConsoleDefaultColor;
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}
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ConsoleCursor.Y -= lines;
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}
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/**************************************
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* Cursor position *
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**************************************/
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Point ConsoleGetCursor()
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{
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return ConsoleCursor;
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}
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extern void ConsoleSetCursor(Point p)
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{
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ConsoleCursor = p;
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}
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void ConsoleCursorIncreasePos (int32 delta)
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{
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// Increase X, Y positions
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ConsoleCursor.Y += delta / ConsoleSize.X;
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ConsoleCursor.X += delta % ConsoleSize.X;
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// Next line if X > Screen width
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while (ConsoleCursor.X >= (int32)ConsoleSize.X)
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{
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ConsoleCursor.Y++;
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ConsoleCursor.X -= ConsoleSize.X;
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}
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// Previous line if X < 0
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while (ConsoleCursor.X < 0)
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{
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ConsoleCursor.Y--;
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ConsoleCursor.X += ConsoleSize.X;
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}
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// Scroll if Y > Screen height
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if (ConsoleCursor.Y >= (int32)ConsoleSize.Y)
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ConsoleScroll(1);
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}
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void ConsoleCursorNewline()
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{
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ConsoleCursor.X = 0;
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if (++ConsoleCursor.Y >= (int32)ConsoleSize.Y)
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ConsoleScroll(1);
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}
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void ConsoleCursorUpdateHardware()
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{
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uint16 temp = (uint16) (ConsoleCursor.Y * ConsoleSize.X + ConsoleCursor.X);
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uint16* port = (uint16*) 0x463 ;
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outportb(*port, 14);
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outportb(*port + 1, (temp >> 8) & 0xff);
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outportb(*port, 15);
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outportb(*port + 1, temp & 0xff);
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}
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uint8 Color (uint8 back, uint8 fore)
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{
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return ((back<<4) | fore);
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}
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void ConsoleSetDefaultColor(uint8 color)
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{
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ConsoleDefaultColor = color;
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}
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uint8 ConsoleGetDefaultColor ()
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{
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return ConsoleDefaultColor;
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}
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UPoint ConsoleGetSize()
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{
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return ConsoleSize;
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}
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void ConsoleCursorGoto(Point p)
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{
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if (p.X >= 0 && p.X < (int32)ConsoleSize.X) ConsoleCursor.X = p.X;
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if (p.Y >= 0 && p.Y < (int32)ConsoleSize.Y) ConsoleCursor.Y = p.Y;
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}
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