156 lines
4.5 KiB
C
156 lines
4.5 KiB
C
/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ch.h"
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#include "hal.h"
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#include "gdisp.h"
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#include "graph.h"
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#if GFX_USE_GRAPH
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static point_t origin; // origin of graph
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static void swapCoordinates(coord_t *a, coord_t *b) {
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coord_t temp;
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temp = *b;
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*b = *a;
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*a = temp;
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}
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static void _horizontalDotLine(coord_t x0, coord_t y0, coord_t x1, uint16_t space, color_t color) {
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uint16_t offset = x0;
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uint16_t count = ((x1 - x0) / space);
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do {
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gdispDrawPixel(offset, y0, color);
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offset += space;
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} while(count--);
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}
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static void _verticalDotLine(coord_t x0, coord_t y0, coord_t y1, uint16_t space, color_t color) {
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uint16_t offset = y0;
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uint16_t count = ((y1 - y0) / space);
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do {
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gdispDrawPixel(x0, offset, color);
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offset += space;
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} while(count--);
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}
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void graphDrawOneQuadrant(Graph *g) {
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if(g->x0 > g->x1)
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swapCoordinates(&g->x0, &g->x1);
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if(g->y0 > g->y1)
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swapCoordinates(&g->y0, &g->y1);
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uint16_t i;
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uint16_t length_x = (g->x1 - g->y0);
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uint16_t length_y = (g->y1 - g->y0);
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uint16_t middle_x = (g->x1 - g->x0) / 2;
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uint16_t middle_y = (g->y1 - g->y0) / 2;
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origin.x = g->x0;
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origin.y = g->y1;
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/* X Axis */
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gdispDrawLine(g->x0, g->y1, g->x1, g->y1, g->axis_color);
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if(g->grid_size > 0)
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for(i = 0; i <= (length_y / g->grid_size); i++)
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_horizontalDotLine(g->x0, g->y0 + g->grid_size * i, g->x1, g->dot_space, g->grid_color);
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/* Y Axis */
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gdispDrawLine(g->x0, g->y0, g->x0, g->y1, g->axis_color);
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if(g->grid_size > 0);
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for(i = 0; i <= (length_x / g->grid_size); i++)
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_verticalDotLine(g->x0 + g->grid_size * i, g->y0, g->y1, g->dot_space, g->grid_color);
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}
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void graphDrawFourQuadrants(Graph *g) {
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if(g->x0 > g->x1)
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swapCoordinates(&g->x0, &g->x1);
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if(g->y0 > g->y1)
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swapCoordinates(&g->y0, &g->y1);
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uint16_t i;
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uint16_t middle_x = (g->x1 - g->x0) / 2;
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uint16_t middle_y = (g->y1 - g->y0) / 2;
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origin.x = middle_x;
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origin.y = middle_y;
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/* X - Axis */
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gdispDrawLine(g->x0, middle_y, g->x1, middle_y, g->axis_color);
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/* draw X - Grid ? */
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if(g->grid_size > 0) {
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for(i = 1; i <= (middle_y / g->grid_size); i++) {
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if(g->grid_size + g->grid_size * i <= middle_y)
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_horizontalDotLine(g->x0, middle_y - g->grid_size * i, g->x1, g->dot_space, g->grid_color);
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if(g->grid_size * i <= middle_y)
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_horizontalDotLine(g->x0, middle_y + g->grid_size * i, g->x1, g->dot_space, g->grid_color);
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}
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}
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/* Y - Axis */
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gdispDrawLine(middle_x, g->y0, middle_x, g->y1, g->axis_color);
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/* draw Y - Grid ? */
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if(g->grid_size > 0) {
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for(i = 1; i <= (middle_x / g->grid_size); i++) {
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if(g->grid_size + g->grid_size * i <= middle_x)
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_verticalDotLine(middle_x - g->grid_size * i, g->y0, g->y1, g->dot_space, g->grid_color);
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if(g->grid_size * i <= middle_x)
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_verticalDotLine(middle_x + g->grid_size * i, g->y0, g->y1, g->dot_space, g->grid_color);
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}
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}
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}
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void graphDrawDot(coord_t x, coord_t y, uint16_t radius, color_t color) {
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if(radius == 0)
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gdispDrawPixel(origin.x + x, origin.y + y, color);
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else
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gdispFillCircle(origin.x + x, origin.y + y, radius, color);
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}
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void graphDrawDots(int coord[][2], uint16_t entries, uint16_t radius, uint16_t color) {
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uint16_t i;
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for(i = 0; i < entries; i++)
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gdispFillCircle(coord[i][0] + origin.x, origin.y - coord[i][1], radius, color);
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}
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void graphDrawNet(int coord[][2], uint16_t entries, uint16_t radius, uint16_t lineColor, uint16_t dotColor) {
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uint16_t i;
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for(i = 0; i < entries; ++i)
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gdispDrawLine(coord[i-1][0] + origin.x, origin.y - coord[i-1][1], coord[i][0] + origin.x, origin.y - coord[i][1], lineColor);
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for(i = 0; i < entries; ++i)
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if(radius != 0)
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lcdFillCircle(coord[i][0] + origin.x, origin.y - coord[i][1], radius, dotColor);
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}
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point_t graphGetOrigin(void) {
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return origin;
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}
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#endif /* GFX_USE_GRAPH */
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