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/*
* Copyright (c) 2021, Valtteri Koskivuori <vkoskiv@gmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "MagnifierWidget.h"
#include <LibGUI/ConnectionToWindowServer.h>
#include <LibGUI/DisplayLink.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Window.h>
#include <LibGfx/Rect.h>
MagnifierWidget::MagnifierWidget()
{
GUI::DisplayLink::register_callback([this](auto) { sync(); });
}
void MagnifierWidget::set_scale_factor(int scale_factor)
{
VERIFY(scale_factor == 2 || scale_factor == 4 || scale_factor == 8);
m_scale_factor = scale_factor;
update();
}
void MagnifierWidget::set_color_filter(OwnPtr<Gfx::ColorBlindnessFilter> color_filter)
{
m_color_filter = move(color_filter);
sync();
}
void MagnifierWidget::display_previous_frame()
{
--m_frame_offset_from_head;
auto index = m_grabbed_bitmaps.head_index() + m_frame_offset_from_head;
m_grabbed_bitmap = m_grabbed_bitmaps.at(index);
update();
}
void MagnifierWidget::display_next_frame()
{
++m_frame_offset_from_head;
auto index = m_grabbed_bitmaps.head_index() + m_frame_offset_from_head;
m_grabbed_bitmap = m_grabbed_bitmaps.at(index);
update();
}
void MagnifierWidget::sync()
{
if (m_pause_capture)
return;
auto size = frame_inner_rect().size();
Gfx::IntSize grab_size { size.width() / m_scale_factor, size.height() / m_scale_factor };
m_grabbed_bitmap = GUI::ConnectionToWindowServer::the().get_screen_bitmap_around_cursor(grab_size).bitmap();
m_grabbed_bitmaps.enqueue(m_grabbed_bitmap);
update();
}
void MagnifierWidget::paint_event(GUI::PaintEvent& event)
{
GUI::Frame::paint_event(event);
GUI::Painter painter(*this);
if (m_grabbed_bitmap)
painter.draw_scaled_bitmap(frame_inner_rect(), *m_grabbed_bitmap, m_grabbed_bitmap->rect());
}
void MagnifierWidget::second_paint_event(GUI::PaintEvent&)
{
if (!m_color_filter)
return;
GUI::Painter painter(*this);
auto target = painter.target();
auto bitmap_clone_or_error = target->clone();
if (bitmap_clone_or_error.is_error())
return;
auto clone = bitmap_clone_or_error.release_value();
auto rect = target->rect();
m_color_filter->apply(*target, rect, *clone, rect);
}
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