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https://github.com/RGBCube/serenity
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19a4b820c4
This has been overkill from the start, and it has been bugging me for a long time. With this change, we're probably a bit slower on most platforms but save huge amounts of space with all in-memory sample datastructures.
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 <AK/Math.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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