DOGS102_Example1 - DOGS-102 Graphic LCD module Example. Based on Igo…

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DOGS-102 Graphic LCD module Example. Based on Igor Skochinsky's "DOGLCDDemo" program.

Dependencies: DOG-S_GraphicLCD mbed

Fork of DOGLCDDemo by Igor Skochinsky

Graphics/Graphics.cpp@0:2a5dccfd318f, 2010-01-14 (annotated)

Committer:: igorsk
Date:: Thu Jan 14 00:49:39 2010 +0000
Revision:: 0:2a5dccfd318f

Who changed what in which revision?

User	Revision	Line number	New contents of line
igorsk	0:2a5dccfd318f	1	/*
igorsk	0:2a5dccfd318f	2	* libmbed-graphics 2D and wireframe 3D graphics library for the MBED
igorsk	0:2a5dccfd318f	3	* microcontroller platform
igorsk	0:2a5dccfd318f	4	* Copyright (C) <2009> Michael Sheldon <mike@mikeasoft.com>
igorsk	0:2a5dccfd318f	5	* Optimized and adapted for AbstractLCD interface
igorsk	0:2a5dccfd318f	6	* Copyright (C) <2010> Igor Skochinsky <skochinsky@gmail.com>
igorsk	0:2a5dccfd318f	7	*
igorsk	0:2a5dccfd318f	8	* This library is free software; you can redistribute it and/or
igorsk	0:2a5dccfd318f	9	* modify it under the terms of the GNU Library General Public
igorsk	0:2a5dccfd318f	10	* License as published by the Free Software Foundation; either
igorsk	0:2a5dccfd318f	11	* version 2 of the License, or (at your option) any later version.
igorsk	0:2a5dccfd318f	12	*
igorsk	0:2a5dccfd318f	13	* This library is distributed in the hope that it will be useful,
igorsk	0:2a5dccfd318f	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
igorsk	0:2a5dccfd318f	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
igorsk	0:2a5dccfd318f	16	* Library General Public License for more details.
igorsk	0:2a5dccfd318f	17	*
igorsk	0:2a5dccfd318f	18	* You should have received a copy of the GNU Library General Public
igorsk	0:2a5dccfd318f	19	* License along with this library; if not, write to the
igorsk	0:2a5dccfd318f	20	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
igorsk	0:2a5dccfd318f	21	* Boston, MA 02111-1307, USA.
igorsk	0:2a5dccfd318f	22	*/
igorsk	0:2a5dccfd318f	23
igorsk	0:2a5dccfd318f	24	#include "Graphics.h"
igorsk	0:2a5dccfd318f	25
igorsk	0:2a5dccfd318f	26	// swap two values
igorsk	0:2a5dccfd318f	27	#define SWAP(a, b) (((a) == (b)) \|\| (((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b))))
igorsk	0:2a5dccfd318f	28
igorsk	0:2a5dccfd318f	29	Graphics::Graphics(AbstractLCD *lcd)
igorsk	0:2a5dccfd318f	30	: _lcd(lcd) {
igorsk	0:2a5dccfd318f	31	_cx3d = _lcd->width() / 2;
igorsk	0:2a5dccfd318f	32	_cy3d = _lcd->height() / 2;
igorsk	0:2a5dccfd318f	33	_cz3d = 150;
igorsk	0:2a5dccfd318f	34	}
igorsk	0:2a5dccfd318f	35
igorsk	0:2a5dccfd318f	36	void Graphics::line(int x0, int y0, int x1, int y1, int colour) {
igorsk	0:2a5dccfd318f	37	// Bresenham
igorsk	0:2a5dccfd318f	38	//printf("line(%d, %d, %d, %d, %d)\n", x0, y0, x1, y1, colour);
igorsk	0:2a5dccfd318f	39	bool steep = abs(y1 - y0) > abs(x1 - x0);
igorsk	0:2a5dccfd318f	40	int temp, deltax, deltay, error, ystep, y, x;
igorsk	0:2a5dccfd318f	41	if (steep) {
igorsk	0:2a5dccfd318f	42	temp = y0;
igorsk	0:2a5dccfd318f	43	y0 = x0;
igorsk	0:2a5dccfd318f	44	x0 = temp;
igorsk	0:2a5dccfd318f	45	temp = y1;
igorsk	0:2a5dccfd318f	46	y1 = x1;
igorsk	0:2a5dccfd318f	47	x1 = temp;
igorsk	0:2a5dccfd318f	48	}
igorsk	0:2a5dccfd318f	49	if (x0 > x1) {
igorsk	0:2a5dccfd318f	50	temp = x1;
igorsk	0:2a5dccfd318f	51	x1 = x0;
igorsk	0:2a5dccfd318f	52	x0 = temp;
igorsk	0:2a5dccfd318f	53	temp = y1;
igorsk	0:2a5dccfd318f	54	y1 = y0;
igorsk	0:2a5dccfd318f	55	y0 = temp;
igorsk	0:2a5dccfd318f	56	}
igorsk	0:2a5dccfd318f	57	deltax = x1 - x0;
igorsk	0:2a5dccfd318f	58	deltay = abs(y1 - y0);
igorsk	0:2a5dccfd318f	59	error = deltax / 2;
igorsk	0:2a5dccfd318f	60	y = y0;
igorsk	0:2a5dccfd318f	61	if (y0 < y1) {
igorsk	0:2a5dccfd318f	62	ystep = 1;
igorsk	0:2a5dccfd318f	63	} else {
igorsk	0:2a5dccfd318f	64	ystep = -1;
igorsk	0:2a5dccfd318f	65	}
igorsk	0:2a5dccfd318f	66	for (x=x0; x<=x1; x++) {
igorsk	0:2a5dccfd318f	67	if (steep) {
igorsk	0:2a5dccfd318f	68	_lcd->pixel(y, x, colour);
igorsk	0:2a5dccfd318f	69	} else {
igorsk	0:2a5dccfd318f	70	_lcd->pixel(x, y, colour);
igorsk	0:2a5dccfd318f	71	}
igorsk	0:2a5dccfd318f	72	error = error - deltay;
igorsk	0:2a5dccfd318f	73	if (error < 0) {
igorsk	0:2a5dccfd318f	74	y = y + ystep;
igorsk	0:2a5dccfd318f	75	error = error + deltax;
igorsk	0:2a5dccfd318f	76	}
igorsk	0:2a5dccfd318f	77	}
igorsk	0:2a5dccfd318f	78	}
igorsk	0:2a5dccfd318f	79
igorsk	0:2a5dccfd318f	80	void Graphics::line3d(int x0, int y0, int z0, int x1, int y1, int z1, int colour) {
igorsk	0:2a5dccfd318f	81	if (z0 + _cz3d <= 0 \|\| z1 + _cz3d <= 0) {
igorsk	0:2a5dccfd318f	82	// Behind the camera
igorsk	0:2a5dccfd318f	83	return;
igorsk	0:2a5dccfd318f	84	}
igorsk	0:2a5dccfd318f	85
igorsk	0:2a5dccfd318f	86	int u0 = _cx3d + x0 * _cz3d / (z0 + _cz3d);
igorsk	0:2a5dccfd318f	87	int v0 = _cy3d + y0 * _cz3d / (z0 + _cz3d);
igorsk	0:2a5dccfd318f	88	int u1 = _cx3d + x1 * _cz3d / (z1 + _cz3d);
igorsk	0:2a5dccfd318f	89	int v1 = _cy3d + y1 * _cz3d / (z1 + _cz3d);
igorsk	0:2a5dccfd318f	90	line(u0, v0, u1, v1, colour);
igorsk	0:2a5dccfd318f	91	}
igorsk	0:2a5dccfd318f	92
igorsk	0:2a5dccfd318f	93	void Graphics::circle(int cx, int cy, int radius, int colour) {
igorsk	0:2a5dccfd318f	94	int x = 0;
igorsk	0:2a5dccfd318f	95	int y = radius;
igorsk	0:2a5dccfd318f	96	int d = 3 - (2 * radius);
igorsk	0:2a5dccfd318f	97
igorsk	0:2a5dccfd318f	98	while (x <= y) {
igorsk	0:2a5dccfd318f	99	_lcd->pixel(cx + x, cy + y, colour);
igorsk	0:2a5dccfd318f	100	_lcd->pixel(cx + y, cy + x, colour);
igorsk	0:2a5dccfd318f	101	_lcd->pixel(cx - x, cy + y, colour);
igorsk	0:2a5dccfd318f	102	_lcd->pixel(cx + y, cy - x, colour);
igorsk	0:2a5dccfd318f	103	_lcd->pixel(cx - x, cy - y, colour);
igorsk	0:2a5dccfd318f	104	_lcd->pixel(cx - y, cy - x, colour);
igorsk	0:2a5dccfd318f	105	_lcd->pixel(cx + x, cy - y, colour);
igorsk	0:2a5dccfd318f	106	_lcd->pixel(cx - y, cy + x, colour);
igorsk	0:2a5dccfd318f	107
igorsk	0:2a5dccfd318f	108	if (d<0)
igorsk	0:2a5dccfd318f	109	d += (4 * x) + 6;
igorsk	0:2a5dccfd318f	110	else
igorsk	0:2a5dccfd318f	111	{
igorsk	0:2a5dccfd318f	112	d += (4 * (x - y)) + 10;
igorsk	0:2a5dccfd318f	113	y--;
igorsk	0:2a5dccfd318f	114	}
igorsk	0:2a5dccfd318f	115	x++;
igorsk	0:2a5dccfd318f	116	}
igorsk	0:2a5dccfd318f	117	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	03 May 2014
Imports:	126
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	2
Followers:	2

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EA DOGS102-6 Graphic LCD

Graphics/Graphics.cpp@0:2a5dccfd318f, 2010-01-14 (annotated)

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