/*
    ChibiOS/GFX - Copyright (C) 2012, 2013
                 Joel Bodenmann aka Tectu <joel@unormal.org>

    This file is part of ChibiOS/GFX.

    ChibiOS/GFX is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/GFX is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "ch.h"
#include "hal.h"
#include "gfx.h"

#define COLOR_SIZE	20
#define PEN_SIZE	20
#define OFFSET		3

#define COLOR_BOX(a)		(ev.x >= a && ev.x <= a + COLOR_SIZE)
#define PEN_BOX(a)			(ev.y >= a && ev.y <= a + COLOR_SIZE)
#define GET_COLOR(a)		(COLOR_BOX(a * COLOR_SIZE + OFFSET))
#define GET_PEN(a)			(PEN_BOX(a * 2 * PEN_SIZE + OFFSET))
#define DRAW_COLOR(a)		(a * COLOR_SIZE + OFFSET)
#define DRAW_PEN(a)			(a * 2 * PEN_SIZE + OFFSET)
#define DRAW_AREA(x, y)		(x >= PEN_SIZE + OFFSET + 3 && x <= gdispGetWidth() && \
							 y >= COLOR_SIZE + OFFSET + 3 && y <= gdispGetHeight())

void drawScreen(void) {
	char *msg = "ChibiOS/GFX";
	font_t		font1, font2;

	font1 = gdispOpenFont("UI2 Double");
	font2 = gdispOpenFont("LargeNumbers");

	gdispClear(White);
	gdispDrawString(gdispGetWidth()-gdispGetStringWidth(msg, font1)-3, 3, msg, font1, Black);
	
	/* colors */
	gdispFillArea(0 * COLOR_SIZE + 3, 3, COLOR_SIZE, COLOR_SIZE, Black);	/* Black */
	gdispFillArea(1 * COLOR_SIZE + 3, 3, COLOR_SIZE, COLOR_SIZE, Red);		/* Red */
	gdispFillArea(2 * COLOR_SIZE + 3, 3, COLOR_SIZE, COLOR_SIZE, Yellow);	/* Yellow */
	gdispFillArea(3 * COLOR_SIZE + 3, 3, COLOR_SIZE, COLOR_SIZE, Green);	/* Green */
	gdispFillArea(4 * COLOR_SIZE + 3, 3, COLOR_SIZE, COLOR_SIZE, Blue);		/* Blue */
	gdispDrawBox (5 * COLOR_SIZE + 3, 3, COLOR_SIZE, COLOR_SIZE, Black);	/* White */

	/* pens */	
	gdispDrawString(OFFSET * 2, DRAW_PEN(1), "1", font2, Black);
	gdispDrawString(OFFSET * 2, DRAW_PEN(2), "2", font2, Black);
	gdispDrawString(OFFSET * 2, DRAW_PEN(3), "3", font2, Black);
	gdispDrawString(OFFSET * 2, DRAW_PEN(4), "4", font2, Black);
	gdispDrawString(OFFSET * 2, DRAW_PEN(5), "5", font2, Black);

	gdispCloseFont(font1);
	gdispCloseFont(font2);
}

GEventMouse		ev;

int main(void) {
	color_t color = Black;
	uint16_t pen = 0;

	halInit();
	chSysInit();

	gdispInit();
	ginputGetMouse(0);
	gdispSetOrientation(GDISP_ROTATE_90);

	drawScreen();

	while (TRUE) {
		ginputGetMouseStatus(0, &ev);
		if (!(ev.current_buttons & GINPUT_MOUSE_BTN_LEFT))
			continue;

		/* inside color box ? */
		if(ev.y >= OFFSET && ev.y <= COLOR_SIZE) {
			     if(GET_COLOR(0)) 	color = Black;
			else if(GET_COLOR(1))	color = Red;
			else if(GET_COLOR(2))	color = Yellow;
			else if(GET_COLOR(3))	color = Green;
			else if(GET_COLOR(4))	color = Blue;
			else if(GET_COLOR(5))	color = White;
		
		/* inside pen box ? */
		} else if(ev.x >= OFFSET && ev.x <= PEN_SIZE) {
			     if(GET_PEN(1))		pen = 0;
			else if(GET_PEN(2))		pen = 1;
			else if(GET_PEN(3))		pen = 2;
			else if(GET_PEN(4))		pen = 3;
			else if(GET_PEN(5))		pen = 4;		

		/* inside drawing area ? */
		} else if(DRAW_AREA(ev.x, ev.y)) {
			if(pen == 0)
				gdispDrawPixel(ev.x, ev.y, color);
			else
				gdispFillCircle(ev.x, ev.y, pen, color);
		}
	}
}