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https://github.com/SerenityOS/serenity
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345662d617
These instances were detected by searching for files that include Kernel/Debug.h, but don't match the regex: \\b(acos|acosh|asin|asinh|atan|atan2|atanh|cbrt|ceil|cos|cosh|E|exp|exp2 |fabs|fmod|hypot|log|log10|log2|NaN|Pi|pow|product_even|product_odd|rema inder|round_to|rsqrt|sin|sincos|sinh|sqrt|Sqrt1_2|Sqrt2|tan|tanh)\\b (Without the linebreaks.) This regex is pessimistic, so there might be more files that don't actually use any math functions. In theory, one might use LibCPP to detect things like this automatically, but let's do this one step after another.
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "SampleWidget.h"
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#include <LibGUI/Painter.h>
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SampleWidget::SampleWidget()
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{
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MUST(set_render_sample_count(512));
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}
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void SampleWidget::render(GUI::PaintEvent& event, FixedArray<float> const& samples)
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{
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GUI::Frame::paint_event(event);
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GUI::Painter painter(*this);
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painter.add_clip_rect(event.rect());
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painter.fill_rect(frame_inner_rect(), Color::Black);
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int x_offset = frame_inner_rect().x();
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int x = x_offset;
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int y_offset = frame_inner_rect().center().y();
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if (samples.size() > 0) {
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float samples_per_pixel = samples.size() / static_cast<float>(frame_inner_rect().width());
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float sample_index = 0;
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while (sample_index < samples.size()) {
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float sample = AK::abs(samples[sample_index]);
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for (size_t i = 1; i < static_cast<size_t>(samples_per_pixel + 0.5f); i++)
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sample = max(sample, AK::abs(samples[sample_index]));
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Gfx::IntPoint min_point = { x, y_offset + static_cast<int>(-sample * frame_inner_rect().height() / 2) };
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Gfx::IntPoint max_point = { x, y_offset + static_cast<int>(sample * frame_inner_rect().height() / 2) };
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painter.draw_line(min_point, max_point, Color::Green);
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sample_index += samples_per_pixel;
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x++;
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}
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} else {
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painter.draw_line({ x, y_offset }, { frame_inner_rect().width(), y_offset }, Color::Green);
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}
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}
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