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/*
* Copyright (C) 2017-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#include "Output.h"
#include <cassert>
#include <cmath>
#include <mutex>
#include <set>
#include <stdexcept>
#include <utility>
using namespace KODI::WINDOWING::WAYLAND;
COutput::COutput(std::uint32_t globalName,
wayland::output_t const& output,
std::function<void()> doneHandler)
: m_globalName{globalName}, m_output{output}, m_doneHandler{std::move(doneHandler)}
{
assert(m_output);
m_output.on_geometry() = [this](std::int32_t x, std::int32_t y, std::int32_t physWidth,
std::int32_t physHeight, wayland::output_subpixel,
std::string const& make, std::string const& model,
const wayland::output_transform&)
{
std::unique_lock<CCriticalSection> lock(m_geometryCriticalSection);
m_position = {x, y};
// Some monitors report invalid (negative) values that would cause an exception
// with CSizeInt
if (physWidth < 0 || physHeight < 0)
m_physicalSize = {};
else
m_physicalSize = {physWidth, physHeight};
m_make = make;
m_model = model;
};
m_output.on_mode() = [this](const wayland::output_mode& flags, std::int32_t width,
std::int32_t height, std::int32_t refresh) {
// std::set.emplace returns pair of iterator to the (possibly) inserted
// element and boolean information whether the element was actually added
// which we do not need
auto modeIterator = m_modes.emplace(CSizeInt{width, height}, refresh).first;
std::unique_lock<CCriticalSection> lock(m_iteratorCriticalSection);
// Remember current and preferred mode
// Current mode is the last one that was sent with current flag set
if (flags & wayland::output_mode::current)
{
m_currentMode = modeIterator;
}
if (flags & wayland::output_mode::preferred)
{
m_preferredMode = modeIterator;
}
};
m_output.on_scale() = [this](std::int32_t scale)
{
m_scale = scale;
};
m_output.on_done() = [this]()
{
m_doneHandler();
};
}
COutput::~COutput() noexcept
{
// Reset event handlers - someone might still hold a reference to the output_t,
// causing events to be dispatched. They should not go to a deleted class.
m_output.on_geometry() = nullptr;
m_output.on_mode() = nullptr;
m_output.on_done() = nullptr;
m_output.on_scale() = nullptr;
}
const COutput::Mode& COutput::GetCurrentMode() const
{
std::unique_lock<CCriticalSection> lock(m_iteratorCriticalSection);
if (m_currentMode == m_modes.end())
{
throw std::runtime_error("Current mode not set");
}
return *m_currentMode;
}
const COutput::Mode& COutput::GetPreferredMode() const
{
std::unique_lock<CCriticalSection> lock(m_iteratorCriticalSection);
if (m_preferredMode == m_modes.end())
{
throw std::runtime_error("Preferred mode not set");
}
return *m_preferredMode;
}
float COutput::GetPixelRatioForMode(const Mode& mode) const
{
std::unique_lock<CCriticalSection> lock(m_geometryCriticalSection);
if (m_physicalSize.IsZero() || mode.size.IsZero())
{
return 1.0f;
}
else
{
return (
(static_cast<float> (m_physicalSize.Width()) / static_cast<float> (mode.size.Width()))
/
(static_cast<float> (m_physicalSize.Height()) / static_cast<float> (mode.size.Height()))
);
}
}
float COutput::GetDpiForMode(const Mode& mode) const
{
std::unique_lock<CCriticalSection> lock(m_geometryCriticalSection);
if (m_physicalSize.IsZero())
{
// We really have no idea, so use a "sane" default
return 96.0;
}
else
{
constexpr float INCH_MM_RATIO{25.4f};
float diagonalPixels = std::sqrt(mode.size.Width() * mode.size.Width() + mode.size.Height() * mode.size.Height());
// physicalWidth/physicalHeight is in millimeters
float diagonalInches =
std::sqrt(static_cast<float>(m_physicalSize.Width() * m_physicalSize.Width() +
m_physicalSize.Height() * m_physicalSize.Height())) /
INCH_MM_RATIO;
return diagonalPixels / diagonalInches;
}
}
float COutput::GetCurrentDpi() const
{
return GetDpiForMode(GetCurrentMode());
}
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