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42 lines
1,008 B
C
42 lines
1,008 B
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <cairo.h>
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#include <wlr/types/wlr_scene.h>
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#include "common/graphic-helpers.h"
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/* Draws a border with a specified line width */
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void
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draw_cairo_border(cairo_t *cairo, struct wlr_fbox fbox, double line_width)
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{
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cairo_save(cairo);
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/* The anchor point of a line is in the center */
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fbox.x += line_width / 2.0;
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fbox.y += line_width / 2.0;
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fbox.width -= line_width;
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fbox.height -= line_width;
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cairo_set_line_width(cairo, line_width);
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cairo_rectangle(cairo, fbox.x, fbox.y, fbox.width, fbox.height);
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cairo_stroke(cairo);
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cairo_restore(cairo);
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}
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/* Sets the cairo color. Splits the single color channels */
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void
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set_cairo_color(cairo_t *cairo, const float *c)
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{
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/*
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* We are dealing with pre-multiplied colors
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* but cairo expects unmultiplied colors here
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*/
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float alpha = c[3];
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if (alpha == 0.0f) {
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cairo_set_source_rgba(cairo, 0, 0, 0, 0);
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return;
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}
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cairo_set_source_rgba(cairo, c[0] / alpha, c[1] / alpha,
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c[2] / alpha, alpha);
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}
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