BATC Forum

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111111111111000  11110 ############     #### 
111111111111000  10001 ############     #   # 
111000000000111  11110 ###         ###  #### 
111000000000111  10000 ###         ###  #    
111111111111000  10000 ############     #    
111111111111000  10000 ############     #    
111000000000000  00000 ###                   
111000000000000        ###                   
111000000000000        ###                   
111000000000000        ###                   
111000000000000        ###                   
111000000000000        ###                   
000000000000000                              
000000000000000                              

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/* print a character c at x,y with a scale of scale_x, scale_y
*/
void TVout::print_scaled_char(unsigned char x, unsigned char y, char c, unsigned char scale_x, unsigned char scale_y) { 
	char i;  // i is used to determine which character row we are reading from the EEPROM
	char y_pos; // y_pos stores where we will be writing on screen
	uint8_t j; // j is the actual byte read from the EEPROM to make up the character line by line.  It will contain the horizontal pixels for one line
	uint8 rx, ry; // repeat x times, repeat y times
	for (i = 0; i < 7; i++) {
		j = pgm_read_byte(((uint32_t)(ascii)) + c*7 + i); // we moved this line because we do not want to keep reading the same byte
		
		for(ry = 0; ry < scale_y; ry++) { // loop through each row
			y_pos = y + (i * scale_y) + ry; // we need to modify this so the pixels are scaled
			for(rx = 0; rx < scale_x; rx++) {
				sp(x + rx, y_pos, (j & 0x80)==0x80);  
				sp(x + rx + (scale_x * 1), y_pos, (j & 0x40)==0x40); 
				sp(x + rx + (scale_x * 2), y_pos, (j & 0x20)==0x20);
				sp(x + rx + (scale_x * 3), y_pos, (j & 0x10)==0x10);
				sp(x + rx + (scale_x * 4), y_pos, (j & 0x08)==0x08);
			}
		}
	}
}

/* print a null terminated string at x,y, scaled by scale_x, scale_y
*/
void TVout::print_scaled_str(unsigned char x, unsigned char y, char *str, unsigned char scale_x, unsigned char scale_y) {
	if (x >= _RESOLUTION_HORIZONTAL || y >= _RESOLUTION_VERTICAL)
		return;
	unsigned char font_width = 5, font_height = 7;
	for (char i=0; str[i]!=0; i++) { 
		print_scaled_char(x, y, str[i], scale_x, scale_y);
		x += font_width * scale_x;
		if(x / font_width >= char_line()) {
			x = 0;
			y += font_height * scale_y;
			if(y >= _RESOLUTION_VERTICAL)
				return;
		}
	}
}

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// macros for readability when selecting mode.
#define _PAL					1
#define _NTSC					0

/*
 TVout.cpp contains a brief explanation of each function.
*/
class TVout {
	public:
		void start_render(unsigned char mode);
		void pause_render();
		void resume_render();
		void clear_screen();
		unsigned char horz_res();
		unsigned char vert_res();
		char char_line();
		void delay_frame(unsigned int x);
		void set_pixel(unsigned char x, unsigned char y, char c);
		unsigned char get_pixel(unsigned char x, unsigned char y);
		void draw_line(unsigned char x0, unsigned char y0, 
					   unsigned char x1, unsigned char y1, char c);
		void print_char(unsigned char x, unsigned char y, char c);
		void print_str(unsigned char x, unsigned char y, char *str);
		void print_scaled_char(unsigned char x, unsigned char y, char c,
					   unsigned char scale_x, unsigned char scale_y);
		void print_scaled_str(unsigned char x, unsigned char y, char *str,
					   unsigned char scale_x, unsigned char scale_y);
};

static void inline sp(unsigned char x, unsigned char y, char c);
#endif

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TV.print_scaled_str(10, 5, "M0ODZ Testing", 2, 3);