File: chart.h

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/*
 * Copyright © 2013 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#ifndef CHART_H
#define CHART_H

struct chart {
	const char *name;
	int x, y, w, h;
	int num_samples;
	int current_sample;
	int range_automatic;
	enum chart_mode {
		CHART_STROKE = 0,
		CHART_FILL,
		CHART_FILL_STROKE,
	} mode;
	enum chart_smooth {
		CHART_LINE = 0,
		CHART_CURVE,
	} smooth;
	float fill_rgb[4];
	float stroke_rgb[4];
	double stroke_width;
	double range[2];
	double *samples;
};

int chart_init(struct chart *chart, const char *name, int num_samples);
void chart_set_mode(struct chart *chart, enum chart_mode mode);
void chart_set_smooth(struct chart *chart, enum chart_smooth smooth);
void chart_set_fill_rgba(struct chart *chart, float red, float green, float blue, float alpha);
void chart_set_stroke_width(struct chart *chart, float width);
void chart_set_stroke_rgba(struct chart *chart, float red, float green, float blue, float alpha);
void chart_set_position(struct chart *chart, int x, int y);
void chart_set_size(struct chart *chart, int w, int h);
void chart_set_range(struct chart *chart, double min, double max);
void chart_add_sample(struct chart *chart, double value);
void chart_draw(struct chart *chart, cairo_t *cr);
void chart_fini(struct chart *chart);

void chart_get_range(struct chart *chart, double *range);

#endif /* CHART_H */