57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
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//
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// ScreensaverPlugin.cpp
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// tmp
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//
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// Created by Bob Polis at 2020-10-26
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// Copyright (c) 2020 SwiftCoder. All rights reserved.
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//
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#include "ScreensaverPlugin.hpp"
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ScreensaverPlugin::ScreensaverPlugin(cairo_t* context, const cairo_rectangle_t& rect)
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: _c {context}, _r {rect}, _x_dist {rect.x, rect.width}, _y_dist {rect.y, rect.height} {
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}
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void ScreensaverPlugin::make_black() {
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cairo_set_source_rgb(_c, 0, 0, 0);
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cairo_rectangle(_c, 0, 0, _r.width, _r.height);
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cairo_fill(_c);
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}
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cairo_rectangle_t ScreensaverPlugin::random_rect() {
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cairo_rectangle_t rect;
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double v1, v2;
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v1 = random_x();
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v2 = random_x();
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if (v1 < v2) {
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rect.x = v1;
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rect.width = v2 - v1;
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} else {
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rect.x = v2;
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rect.width = v1 - v2;
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}
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v1 = random_y();
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v2 = random_y();
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if (v1 < v2) {
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rect.y = v1;
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rect.height = v2 - v1;
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} else {
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rect.y = v2;
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rect.height = v1 - v2;
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}
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return rect;
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}
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double ScreensaverPlugin::random_x() {
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return _x_dist(_eng);
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}
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double ScreensaverPlugin::random_y() {
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return _y_dist(_eng);
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}
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double ScreensaverPlugin::random01() {
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return _01_dist(_eng);
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}
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