/**
 * \file
 * <!--
 * This file is part of BeRTOS.
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 * it under the terms of the GNU General Public License as published by
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 *
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 * 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.
 *
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 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
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 *
 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
 * Copyright 1999, 2000, 2001, 2003 Bernie Innocenti <bernie@codewiz.org>
 *
 * -->
 *
 * \author Bernie Innocenti <bernie@codewiz.org>
 *
 * \brief Simple charts on top of mware/gfx routines (implementation).
 *
 */

#include "charts.h"
#include <gfx/gfx.h>


#ifndef CONFIG_CHART_ARROWS
#define CONFIG_CHART_ARROWS 0
#endif


void chart_init(Bitmap *bm, coord_t xmin, coord_t ymin, coord_t xmax, coord_t ymax)
{
	/* Clear the chart area */
	gfx_rectClear(bm, xmin, ymin, xmax, ymax);

	gfx_setClipRect(bm, xmin + CHART_BORDERLEFT, ymin + CHART_BORDERTOP,
		xmax - CHART_BORDERRIGHT, ymax - CHART_BORDERBOTTOM);

	chart_drawAxis(bm);
}


void chart_setScale(Bitmap *bm, chart_x_t xmin, chart_y_t ymin, chart_x_t xmax, chart_y_t ymax)
{
	gfx_setViewRect(bm, xmin, ymin, xmax, ymax);
}


/**
 * Draw the chart axes
 */
void chart_drawAxis(Bitmap *bm)
{
#if CONFIG_CHART_ARROWS

	/* Draw axis */
	gfx_moveTo(bm, bm->cr.xmin, bm->cr.ymin + 4);
	gfx_lineTo(bm, bm->cr.xmin, bm->cr.ymax - 1);
	gfx_lineTo(bm, bm->cr.xmax - 4 - 1, bm->cr.ymax - 1);

	/* Draw up arrow */
	gfx_moveTo(bm, bm->cr.xmin - 2, bm->cr.ymin + 3);
	gfx_lineTo(bm, bm->cr.xmin + 2, bm->cr.ymin + 3);
	gfx_lineTo(bm, bm->cr.xmin, bm->cr.ymin);
	gfx_lineTo(bm, bm->cr.xmin - 2, bm->cr.ymin + 3);

	/* Draw right arrow */
	gfx_moveTo(bm, bm->cr.xmax - 4, bm->cr.ymax - 3);
	gfx_lineTo(bm, bm->cr.xmax - 4, bm->cr.ymax + 1);
	gfx_lineTo(bm, bm->cr.xmax - 1, bm->cr.ymax - 1);
	gfx_lineTo(bm, bm->cr.xmax - 4, bm->cr.ymax - 3);

#else /* CONFIG_CHART_ARROWS */

	/* Draw a box around the chart */
	gfx_rectDraw(bm, bm->cr.xmin, bm->cr.ymin, bm->cr.xmax, bm->cr.ymax);

#endif /* CONFIG_CHART_ARROWS */

	//CHECK_WALL(wall_before_raster, WALL_SIZE);
	//CHECK_WALL(wall_after_raster, WALL_SIZE);
}


/**
 * Draw a set of \a curve_cnt connected segments, whose Y coordinates
 * are identified by the \a curve_y array and X-coordinates are
 * are evenly spaced by one virtual unit.
 */
void chart_drawCurve(Bitmap *bm, const chart_y_t *curve_y, int curve_cnt)
{
	int i;

	gfx_moveTo(bm, gfx_transformX(bm, 0), gfx_transformY(bm, curve_y[0]));

	for (i = 1; i < curve_cnt; i++)
		gfx_lineTo(bm, gfx_transformX(bm, i), gfx_transformY(bm, curve_y[i]));

	//CHECK_WALL(wall_before_raster, WALL_SIZE);
	//CHECK_WALL(wall_after_raster, WALL_SIZE);
}


/**
 * Disegna dei dot in corrispondenza delle coppie (dotsx[i];dotsy[i])
 * Se dotsx e' NULL, i punti vengono disegnati ad intervalli regolari.
 */
void chart_drawDots(Bitmap *bm, const chart_x_t *dots_x, const chart_y_t *dots_y, int cnt)
{
	int i;
	coord_t x, y;

	for (i = 0; i < cnt; i++)
	{
		if (dots_x)
			x = gfx_transformX(bm, dots_x[i]);
		else
			x = gfx_transformX(bm, i);

		y = gfx_transformY(bm, dots_y[i]);

		/* Draw tick over the curve */
		gfx_rectFill(bm,
			x - TICKS_WIDTH / 2, y - TICKS_HEIGHT / 2,
			x + (TICKS_WIDTH + 1) / 2, y + (TICKS_HEIGHT + 1) / 2);

		/* Draw vertical line from the curve to the X-axis */
		//gfx_drawLine(bm, x, y, x, bm->cr.ymax - 1);
	}

	//CHECK_WALL(wall_before_raster, WALL_SIZE);
	//CHECK_WALL(wall_after_raster, WALL_SIZE);
}