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