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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2023 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Window/Unix/VulkanImplX11.hpp>
#include <SFML/Window/Unix/Display.hpp>
#include <dlfcn.h>
#define VK_USE_PLATFORM_XLIB_KHR
#define VK_NO_PROTOTYPES
#include <vulkan/vulkan.h>
#include <string>
#include <map>
#include <cstring>
namespace
{
struct VulkanLibraryWrapper
{
VulkanLibraryWrapper() :
library(NULL)
{
}
~VulkanLibraryWrapper()
{
if (library)
dlclose(library);
}
// Try to load the library and all the required entry points
bool loadLibrary()
{
if (library)
return true;
library = dlopen("libvulkan.so.1", RTLD_LAZY);
if (!library)
return false;
if (!loadEntryPoint(vkGetInstanceProcAddr, "vkGetInstanceProcAddr"))
{
dlclose(library);
library = NULL;
return false;
}
if (!loadEntryPoint(vkEnumerateInstanceLayerProperties, "vkEnumerateInstanceLayerProperties"))
{
dlclose(library);
library = NULL;
return false;
}
if (!loadEntryPoint(vkEnumerateInstanceExtensionProperties, "vkEnumerateInstanceExtensionProperties"))
{
dlclose(library);
library = NULL;
return false;
}
return true;
}
template<typename T>
bool loadEntryPoint(T& entryPoint, const char* name)
{
entryPoint = reinterpret_cast<T>(dlsym(library, name));
return (entryPoint != NULL);
}
void* library;
PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr;
PFN_vkEnumerateInstanceLayerProperties vkEnumerateInstanceLayerProperties;
PFN_vkEnumerateInstanceExtensionProperties vkEnumerateInstanceExtensionProperties;
};
VulkanLibraryWrapper wrapper;
}
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
bool VulkanImplX11::isAvailable(bool requireGraphics)
{
static bool checked = false;
static bool computeAvailable = false;
static bool graphicsAvailable = false;
if (!checked)
{
checked = true;
// Check if the library is available
computeAvailable = wrapper.loadLibrary();
// To check for instance extensions we don't need to differentiate between graphics and compute
graphicsAvailable = computeAvailable;
if (graphicsAvailable)
{
// Retrieve the available instance extensions
std::vector<VkExtensionProperties> extensionProperties;
uint32_t extensionCount = 0;
wrapper.vkEnumerateInstanceExtensionProperties(0, &extensionCount, NULL);
extensionProperties.resize(extensionCount);
wrapper.vkEnumerateInstanceExtensionProperties(0, &extensionCount, &extensionProperties[0]);
// Check if the necessary extensions are available
bool has_VK_KHR_surface = false;
bool has_VK_KHR_platform_surface = false;
for (std::vector<VkExtensionProperties>::const_iterator iter = extensionProperties.begin(); iter != extensionProperties.end(); ++iter)
{
if (!std::strcmp(iter->extensionName, VK_KHR_SURFACE_EXTENSION_NAME))
{
has_VK_KHR_surface = true;
}
else if (!std::strcmp(iter->extensionName, VK_KHR_XLIB_SURFACE_EXTENSION_NAME))
{
has_VK_KHR_platform_surface = true;
}
}
if (!has_VK_KHR_surface || !has_VK_KHR_platform_surface)
graphicsAvailable = false;
}
}
if (requireGraphics)
return graphicsAvailable;
return computeAvailable;
}
////////////////////////////////////////////////////////////
VulkanFunctionPointer VulkanImplX11::getFunction(const char* name)
{
if (!isAvailable(false))
return 0;
return reinterpret_cast<VulkanFunctionPointer>(dlsym(wrapper.library, name));
}
////////////////////////////////////////////////////////////
const std::vector<const char*>& VulkanImplX11::getGraphicsRequiredInstanceExtensions()
{
static std::vector<const char*> extensions;
if (extensions.empty())
{
extensions.push_back(VK_KHR_SURFACE_EXTENSION_NAME);
extensions.push_back(VK_KHR_XLIB_SURFACE_EXTENSION_NAME);
}
return extensions;
}
////////////////////////////////////////////////////////////
bool VulkanImplX11::createVulkanSurface(const VkInstance& instance, WindowHandle windowHandle, VkSurfaceKHR& surface, const VkAllocationCallbacks* allocator)
{
if (!isAvailable())
return false;
// Make a copy of the instance handle since we get it passed as a reference
VkInstance inst = instance;
PFN_vkCreateXlibSurfaceKHR vkCreateXlibSurfaceKHR = reinterpret_cast<PFN_vkCreateXlibSurfaceKHR>(wrapper.vkGetInstanceProcAddr(inst, "vkCreateXlibSurfaceKHR"));
if (!vkCreateXlibSurfaceKHR)
return false;
// Since the surface is basically attached to the window, the connection
// to the X display will stay open even after we open and close it here
VkXlibSurfaceCreateInfoKHR surfaceCreateInfo = VkXlibSurfaceCreateInfoKHR();
surfaceCreateInfo.sType = VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR;
surfaceCreateInfo.dpy = OpenDisplay();
surfaceCreateInfo.window = windowHandle;
bool result = (vkCreateXlibSurfaceKHR(instance, &surfaceCreateInfo, allocator, &surface) == VK_SUCCESS);
CloseDisplay(surfaceCreateInfo.dpy);
return result;
}
} // namespace priv
} // namespace sf
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