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common/graphic-helpers: Add cairo helpers

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Consolatis 2022-08-20 20:11:58 +02:00 • committed by Johan Malm
parent 8c8583ef94
commit fb36463c34
4 changed files with 48 additions and 61 deletions
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26
src/common/graphic-helpers.c
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@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
#include <assert.h>
#include <cairo.h>
#include <stdlib.h>
#include <wlr/types/wlr_scene.h>
#include "common/graphic-helpers.h"
@ -58,3 +59,28 @@ multi_rect_set_size(struct multi_rect *rect, int width, int height)
line_width, height - i * line_width * 2);
}
}
/* Draws a border with a specified line width */
void
draw_cairo_border(cairo_t *cairo, double width, double height, double line_width)
{
cairo_save(cairo);
double x, y, w, h;
/* The anchor point of a line is in the center */
x = y = line_width / 2;
w = width - line_width;
h = height - line_width;
cairo_set_line_width(cairo, line_width);
cairo_rectangle(cairo, x, y, w, h);
cairo_stroke(cairo);
cairo_restore(cairo);
}
/* Sets the cairo color. Splits the single color channels */
void
set_cairo_color(cairo_t *cairo, float *c)
{
cairo_set_source_rgba(cairo, c[0], c[1], c[2], c[3]);
}