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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "SampleWidget.h"
#include <LibGUI/Painter.h>
SampleWidget::SampleWidget()
{
MUST(set_render_sample_count(512));
}
void SampleWidget::render(GUI::PaintEvent& event, FixedArray<float> const& samples)
{
GUI::Frame::paint_event(event);
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.fill_rect(frame_inner_rect(), Color::Black);
int x_offset = frame_inner_rect().x();
int x = x_offset;
int y_offset = frame_inner_rect().center().y();
if (samples.size() > 0) {
float samples_per_pixel = samples.size() / static_cast<float>(frame_inner_rect().width());
float sample_index = 0;
while (sample_index < samples.size()) {
float sample = AK::abs(samples[sample_index]);
for (size_t i = 1; i < static_cast<size_t>(samples_per_pixel + 0.5f); i++)
sample = max(sample, AK::abs(samples[sample_index]));
Gfx::IntPoint min_point = { x, y_offset + static_cast<int>(-sample * frame_inner_rect().height() / 2) };
Gfx::IntPoint max_point = { x, y_offset + static_cast<int>(sample * frame_inner_rect().height() / 2) };
painter.draw_line(min_point, max_point, Color::Green);
sample_index += samples_per_pixel;
x++;
}
} else {
painter.draw_line({ x, y_offset }, { frame_inner_rect().width(), y_offset }, Color::Green);
}
}
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