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/*
* Copyright (C) 2005-2018 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.
*/
#pragma once
#include <memory>
#include <queue>
#include <gbm.h>
namespace KODI
{
namespace WINDOWING
{
namespace GBM
{
/**
* @brief A wrapper for gbm c classes to allow OOP and RAII.
*
*/
class CGBMUtils
{
public:
CGBMUtils(const CGBMUtils&) = delete;
CGBMUtils& operator=(const CGBMUtils&) = delete;
CGBMUtils() = default;
~CGBMUtils() = default;
/**
* @brief Create a gbm device for allocating buffers
*
* @param fd The file descriptor for a backend device
* @return true The device creation succeeded
* @return false The device creation failed
*/
bool CreateDevice(int fd);
/**
* @brief A wrapper for gbm_device to allow OOP and RAII
*
*/
class CGBMDevice
{
public:
CGBMDevice(const CGBMDevice&) = delete;
CGBMDevice& operator=(const CGBMDevice&) = delete;
explicit CGBMDevice(gbm_device* device);
~CGBMDevice() = default;
/**
* @brief Create a gbm surface
*
* @param width The width to use for the surface
* @param height The height to use for the surface
* @param format The format to use for the surface
* @param modifiers The modifiers to use for the surface
* @param modifiers_count The amount of modifiers in the modifiers param
* @return true The surface creation succeeded
* @return false The surface creation failed
*/
bool CreateSurface(int width,
int height,
uint32_t format,
const uint64_t* modifiers,
const int modifiers_count);
/**
* @brief Get the underlying gbm_device
*
* @return gbm_device* A pointer to the underlying gbm_device
*/
gbm_device* Get() const { return m_device; }
/**
* @brief A wrapper for gbm_surface to allow OOP and RAII
*
*/
class CGBMSurface
{
public:
CGBMSurface(const CGBMSurface&) = delete;
CGBMSurface& operator=(const CGBMSurface&) = delete;
explicit CGBMSurface(gbm_surface* surface);
~CGBMSurface() = default;
/**
* @brief Get the underlying gbm_surface
*
* @return gbm_surface* A pointer to the underlying gbm_surface
*/
gbm_surface* Get() const { return m_surface; }
/**
* @brief A wrapper for gbm_bo to allow OOP and RAII
*
*/
class CGBMSurfaceBuffer
{
public:
CGBMSurfaceBuffer(const CGBMSurfaceBuffer&) = delete;
CGBMSurfaceBuffer& operator=(const CGBMSurfaceBuffer&) = delete;
explicit CGBMSurfaceBuffer(gbm_surface* surface);
~CGBMSurfaceBuffer();
/**
* @brief Get the underlying gbm_bo
*
* @return gbm_bo* A pointer to the underlying gbm_bo
*/
gbm_bo* Get() const { return m_buffer; }
private:
gbm_surface* m_surface{nullptr};
gbm_bo* m_buffer{nullptr};
};
/**
* @brief Lock the surface's current front buffer.
*
* @return CGBMSurfaceBuffer* A pointer to a CGBMSurfaceBuffer object
*/
CGBMSurfaceBuffer* LockFrontBuffer();
private:
gbm_surface* m_surface{nullptr};
std::queue<std::unique_ptr<CGBMSurfaceBuffer>> m_buffers;
};
/**
* @brief Get the CGBMSurface object
*
* @return CGBMSurface* A pointer to the CGBMSurface object
*/
CGBMDevice::CGBMSurface* GetSurface() const { return m_surface.get(); }
private:
gbm_device* m_device{nullptr};
struct CGBMSurfaceDeleter
{
void operator()(CGBMSurface* p) const
{
if (p)
gbm_surface_destroy(p->Get());
}
};
std::unique_ptr<CGBMSurface, CGBMSurfaceDeleter> m_surface;
};
/**
* @brief Get the CGBMDevice object
*
* @return CGBMDevice* A pointer to the CGBMDevice object
*/
CGBMUtils::CGBMDevice* GetDevice() const { return m_device.get(); }
private:
struct CGBMDeviceDeleter
{
void operator()(CGBMDevice* p) const
{
if (p)
gbm_device_destroy(p->Get());
}
};
std::unique_ptr<CGBMDevice, CGBMDeviceDeleter> m_device;
};
}
}
}
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