1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20 */
21
22 /*
23 * @author Mark Callow, www.edgewise-consulting.com. Based on Jacob Lifshay's
24 * SDL_x11vulkan.c.
25 */
26
27 #include "../../SDL_internal.h"
28
29 #if SDL_VIDEO_VULKAN && SDL_VIDEO_DRIVER_WINDOWS
30
31 #include "SDL_windowsvideo.h"
32 #include "SDL_windowswindow.h"
33
34 #include "SDL_loadso.h"
35 #include "SDL_windowsvulkan.h"
36 #include "SDL_syswm.h"
37
WIN_Vulkan_LoadLibrary(_THIS,const char * path)38 int WIN_Vulkan_LoadLibrary(_THIS, const char *path)
39 {
40 VkExtensionProperties *extensions = NULL;
41 Uint32 extensionCount = 0;
42 Uint32 i;
43 SDL_bool hasSurfaceExtension = SDL_FALSE;
44 SDL_bool hasWin32SurfaceExtension = SDL_FALSE;
45 PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr = NULL;
46 if(_this->vulkan_config.loader_handle)
47 return SDL_SetError("Vulkan already loaded");
48
49 /* Load the Vulkan loader library */
50 if(!path)
51 path = SDL_getenv("SDL_VULKAN_LIBRARY");
52 if(!path)
53 path = "vulkan-1.dll";
54 _this->vulkan_config.loader_handle = SDL_LoadObject(path);
55 if(!_this->vulkan_config.loader_handle)
56 return -1;
57 SDL_strlcpy(_this->vulkan_config.loader_path, path,
58 SDL_arraysize(_this->vulkan_config.loader_path));
59 vkGetInstanceProcAddr = (PFN_vkGetInstanceProcAddr)SDL_LoadFunction(
60 _this->vulkan_config.loader_handle, "vkGetInstanceProcAddr");
61 if(!vkGetInstanceProcAddr)
62 goto fail;
63 _this->vulkan_config.vkGetInstanceProcAddr = (void *)vkGetInstanceProcAddr;
64 _this->vulkan_config.vkEnumerateInstanceExtensionProperties =
65 (void *)((PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr)(
66 VK_NULL_HANDLE, "vkEnumerateInstanceExtensionProperties");
67 if(!_this->vulkan_config.vkEnumerateInstanceExtensionProperties)
68 goto fail;
69 extensions = SDL_Vulkan_CreateInstanceExtensionsList(
70 (PFN_vkEnumerateInstanceExtensionProperties)
71 _this->vulkan_config.vkEnumerateInstanceExtensionProperties,
72 &extensionCount);
73 if(!extensions)
74 goto fail;
75 for(i = 0; i < extensionCount; i++)
76 {
77 if(SDL_strcmp(VK_KHR_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
78 hasSurfaceExtension = SDL_TRUE;
79 else if(SDL_strcmp(VK_KHR_WIN32_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
80 hasWin32SurfaceExtension = SDL_TRUE;
81 }
82 SDL_free(extensions);
83 if(!hasSurfaceExtension)
84 {
85 SDL_SetError("Installed Vulkan doesn't implement the "
86 VK_KHR_SURFACE_EXTENSION_NAME " extension");
87 goto fail;
88 }
89 else if(!hasWin32SurfaceExtension)
90 {
91 SDL_SetError("Installed Vulkan doesn't implement the "
92 VK_KHR_WIN32_SURFACE_EXTENSION_NAME "extension");
93 goto fail;
94 }
95 return 0;
96
97 fail:
98 SDL_UnloadObject(_this->vulkan_config.loader_handle);
99 _this->vulkan_config.loader_handle = NULL;
100 return -1;
101 }
102
WIN_Vulkan_UnloadLibrary(_THIS)103 void WIN_Vulkan_UnloadLibrary(_THIS)
104 {
105 if(_this->vulkan_config.loader_handle)
106 {
107 SDL_UnloadObject(_this->vulkan_config.loader_handle);
108 _this->vulkan_config.loader_handle = NULL;
109 }
110 }
111
WIN_Vulkan_GetInstanceExtensions(_THIS,SDL_Window * window,unsigned * count,const char ** names)112 SDL_bool WIN_Vulkan_GetInstanceExtensions(_THIS,
113 SDL_Window *window,
114 unsigned *count,
115 const char **names)
116 {
117 static const char *const extensionsForWin32[] = {
118 VK_KHR_SURFACE_EXTENSION_NAME, VK_KHR_WIN32_SURFACE_EXTENSION_NAME
119 };
120 if(!_this->vulkan_config.loader_handle)
121 {
122 SDL_SetError("Vulkan is not loaded");
123 return SDL_FALSE;
124 }
125 return SDL_Vulkan_GetInstanceExtensions_Helper(
126 count, names, SDL_arraysize(extensionsForWin32),
127 extensionsForWin32);
128 }
129
WIN_Vulkan_CreateSurface(_THIS,SDL_Window * window,VkInstance instance,VkSurfaceKHR * surface)130 SDL_bool WIN_Vulkan_CreateSurface(_THIS,
131 SDL_Window *window,
132 VkInstance instance,
133 VkSurfaceKHR *surface)
134 {
135 SDL_WindowData *windowData = (SDL_WindowData *)window->driverdata;
136 PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr =
137 (PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr;
138 PFN_vkCreateWin32SurfaceKHR vkCreateWin32SurfaceKHR =
139 (PFN_vkCreateWin32SurfaceKHR)vkGetInstanceProcAddr(
140 (VkInstance)instance,
141 "vkCreateWin32SurfaceKHR");
142 VkWin32SurfaceCreateInfoKHR createInfo;
143 VkResult result;
144
145 if(!_this->vulkan_config.loader_handle)
146 {
147 SDL_SetError("Vulkan is not loaded");
148 return SDL_FALSE;
149 }
150
151 if(!vkCreateWin32SurfaceKHR)
152 {
153 SDL_SetError(VK_KHR_WIN32_SURFACE_EXTENSION_NAME
154 " extension is not enabled in the Vulkan instance.");
155 return SDL_FALSE;
156 }
157 createInfo.sType = VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR;
158 createInfo.pNext = NULL;
159 createInfo.flags = 0;
160 createInfo.hinstance = windowData->hinstance;
161 createInfo.hwnd = windowData->hwnd;
162 result = vkCreateWin32SurfaceKHR(instance, &createInfo,
163 NULL, surface);
164 if(result != VK_SUCCESS)
165 {
166 SDL_SetError("vkCreateWin32SurfaceKHR failed: %s",
167 SDL_Vulkan_GetResultString(result));
168 return SDL_FALSE;
169 }
170 return SDL_TRUE;
171 }
172
173 #endif
174
175 /* vi: set ts=4 sw=4 expandtab: */
176