ks0108.c

Graphic Library for KS0108 Controller (128x64 Dot Display). Written with gss AVR- Compiler.

/*
 * Copyright:      Fabian Maximilian Thiele  mailto:[e-mail]
 * Author:         Fabian Maximilian Thiele
 * Remarks:        this Copyright must be included
 * known Problems: none
 * Version:        1.1
 * Description:    Graphic Library for KS0108- (and compatible) based LCDs
 * 
 */

#include <inttypes.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include "ks0108.h"

lcdCoord			ks0108Coord;
uint8_t				ks0108Inverted=0;
ks0108FontCallback	ks0108FontRead;
uint8_t				ks0108FontColor;
const uint8_t*		ks0108Font;

void ks0108DrawLine(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t color) {
	uint8_t length, i, y, yAlt, xTmp, yTmp;
	int16_t m;
	
	//
	// vertical line
	//
	if(x1 == x2) {
		// x1|y1 must be the upper point
		if(y1 > y2) {
			yTmp = y1;
			y1 = y2;
			y2 = yTmp;
		}
		ks0108DrawVertLine(x1, y1, y2-y1, color);
	
	//
	// horizontal line
	//
	} else if(y1 == y2) {	
		// x1|y1 must be the left point
		if(x1 > x2) {
			xTmp = x1;
			x1 = x2;
			x2 = xTmp;
		}
		ks0108DrawHoriLine(x1, y1, x2-x1, color);
	
	//
	// schiefe line :)
	//
	} else {
		// angle >= 45