SDL_vulkan.h
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Simple DirectMedia Layer
Copyright (C) 2017, Mark Callow
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.
*/
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
/**
* \file SDL_vulkan.h
*
* Header file for functions to creating Vulkan surfaces on SDL windows.
*/
#ifndef SDL_vulkan_h_
#define SDL_vulkan_h_
#include "SDL_video.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif
39
40
41
42
43
/* Avoid including vulkan.h, don't define VkInstance if it's already included */
#ifdef VULKAN_H_
#define NO_SDL_VULKAN_TYPEDEFS
#endif
#ifndef NO_SDL_VULKAN_TYPEDEFS
44
45
46
47
48
49
50
51
52
53
54
#define VK_DEFINE_HANDLE(object) typedef struct object##_T* object;
#if defined(__LP64__) || defined(_WIN64) || defined(__x86_64__) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__)
#define VK_DEFINE_NON_DISPATCHABLE_HANDLE(object) typedef struct object##_T *object;
#else
#define VK_DEFINE_NON_DISPATCHABLE_HANDLE(object) typedef uint64_t object;
#endif
VK_DEFINE_HANDLE(VkInstance)
VK_DEFINE_NON_DISPATCHABLE_HANDLE(VkSurfaceKHR)
55
#endif /* !NO_SDL_VULKAN_TYPEDEFS */
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
typedef VkInstance SDL_vulkanInstance;
typedef VkSurfaceKHR SDL_vulkanSurface; /* for compatibility with Tizen */
/**
* \name Vulkan support functions
*
* \note SDL_Vulkan_GetInstanceExtensions & SDL_Vulkan_CreateSurface API
* is compatable with Tizen's implementation of Vulkan in SDL.
*/
/* @{ */
/**
* \brief Dynamically load a Vulkan loader library.
*
* \param [in] path The platform dependent Vulkan loader library name, or
* \c NULL to open the default Vulkan loader library.
*
* \return \c 0 on success, or \c -1 if the library couldn't be loaded.
*
* This should be done after initializing the video driver, but before
* creating any Vulkan windows. If no Vulkan loader library is loaded, the
* default library will be loaded upon creation of the first Vulkan window.
*
* \note If you specify a non-NULL \a path, you should retrieve all of the
* Vulkan functions used in your program from the dynamic library using
* \c SDL_Vulkan_GetVkGetInstanceProcAddr() unless you can guarantee
* \a path points to the same vulkan loader library that you linked to.
*
* \note On Apple devices, if \a path is NULL, SDL will attempt to find
* the vkGetInstanceProcAddr address within all the mach-o images of
* the current process. This is because the currently (v0.17.0)
* recommended MoltenVK (Vulkan on Metal) usage is as a static library.
* If it is not found then SDL will attempt to load \c libMoltenVK.dylib.
* Applications using the dylib alternative therefore do not need to do
* anything special when calling SDL.
*
* \note On non-Apple devices, SDL requires you to either not link to the
* Vulkan loader or link to a dynamic library version. This limitation
* may be removed in a future version of SDL.
*
* \note This function will fail if there are no working Vulkan drivers
* installed.
*
* \sa SDL_Vulkan_GetVkGetInstanceProcAddr()
* \sa SDL_Vulkan_UnloadLibrary()
*/
extern DECLSPEC int SDLCALL SDL_Vulkan_LoadLibrary(const char *path);
/**
* \brief Get the address of the \c vkGetInstanceProcAddr function.
*
* \note This should be called after either calling SDL_Vulkan_LoadLibrary
* or creating an SDL_Window with the SDL_WINDOW_VULKAN flag.
*/
extern DECLSPEC void *SDLCALL SDL_Vulkan_GetVkGetInstanceProcAddr(void);
/**
* \brief Unload the Vulkan loader library previously loaded by
* \c SDL_Vulkan_LoadLibrary().
*
* \sa SDL_Vulkan_LoadLibrary()
*/
extern DECLSPEC void SDLCALL SDL_Vulkan_UnloadLibrary(void);
/**
* \brief Get the names of the Vulkan instance extensions needed to create
* a surface with \c SDL_Vulkan_CreateSurface().
*
* \param [in] window Window for which the required Vulkan instance
* extensions should be retrieved
* \param [in,out] count pointer to an \c unsigned related to the number of
* required Vulkan instance extensions
* \param [out] names \c NULL or a pointer to an array to be filled with the
* required Vulkan instance extensions
*
* \return \c SDL_TRUE on success, \c SDL_FALSE on error.
*
* If \a pNames is \c NULL, then the number of required Vulkan instance
* extensions is returned in pCount. Otherwise, \a pCount must point to a
* variable set to the number of elements in the \a pNames array, and on
* return the variable is overwritten with the number of names actually
* written to \a pNames. If \a pCount is less than the number of required
* extensions, at most \a pCount structures will be written. If \a pCount
* is smaller than the number of required extensions, \c SDL_FALSE will be
* returned instead of \c SDL_TRUE, to indicate that not all the required
* extensions were returned.
*
* \note The returned list of extensions will contain \c VK_KHR_surface
* and zero or more platform specific extensions
*
* \note The extension names queried here must be enabled when calling
* VkCreateInstance, otherwise surface creation will fail.
*
* \note \c window should have been created with the \c SDL_WINDOW_VULKAN flag.
*
* \code
153
* unsigned int count;
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
* // get count of required extensions
* if(!SDL_Vulkan_GetInstanceExtensions(window, &count, NULL))
* handle_error();
*
* static const char *const additionalExtensions[] =
* {
* VK_EXT_DEBUG_REPORT_EXTENSION_NAME, // example additional extension
* };
* size_t additionalExtensionsCount = sizeof(additionalExtensions) / sizeof(additionalExtensions[0]);
* size_t extensionCount = count + additionalExtensionsCount;
* const char **names = malloc(sizeof(const char *) * extensionCount);
* if(!names)
* handle_error();
*
* // get names of required extensions
* if(!SDL_Vulkan_GetInstanceExtensions(window, &count, names))
* handle_error();
*
* // copy additional extensions after required extensions
* for(size_t i = 0; i < additionalExtensionsCount; i++)
* names[i + count] = additionalExtensions[i];
*
* VkInstanceCreateInfo instanceCreateInfo = {};
* instanceCreateInfo.enabledExtensionCount = extensionCount;
* instanceCreateInfo.ppEnabledExtensionNames = names;
* // fill in rest of instanceCreateInfo
*
* VkInstance instance;
* // create the Vulkan instance
* VkResult result = vkCreateInstance(&instanceCreateInfo, NULL, &instance);
* free(names);
* \endcode
*
* \sa SDL_Vulkan_CreateSurface()
*/
extern DECLSPEC SDL_bool SDLCALL SDL_Vulkan_GetInstanceExtensions(
SDL_Window *window,
191
unsigned int *pCount,
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
const char **pNames);
/**
* \brief Create a Vulkan rendering surface for a window.
*
* \param [in] window SDL_Window to which to attach the rendering surface.
* \param [in] instance handle to the Vulkan instance to use.
* \param [out] surface pointer to a VkSurfaceKHR handle to receive the
* handle of the newly created surface.
*
* \return \c SDL_TRUE on success, \c SDL_FALSE on error.
*
* \code
* VkInstance instance;
* SDL_Window *window;
*
* // create instance and window
*
* // create the Vulkan surface
* VkSurfaceKHR surface;
* if(!SDL_Vulkan_CreateSurface(window, instance, &surface))
* handle_error();
* \endcode
*
* \note \a window should have been created with the \c SDL_WINDOW_VULKAN flag.
*
* \note \a instance should have been created with the extensions returned
* by \c SDL_Vulkan_CreateSurface() enabled.
*
* \sa SDL_Vulkan_GetInstanceExtensions()
*/
extern DECLSPEC SDL_bool SDLCALL SDL_Vulkan_CreateSurface(
SDL_Window *window,
VkInstance instance,
VkSurfaceKHR* surface);
/**
* \brief Get the size of a window's underlying drawable in pixels (for use
* with setting viewport, scissor & etc).
*
* \param window SDL_Window from which the drawable size should be queried
* \param w Pointer to variable for storing the width in pixels,
* may be NULL
* \param h Pointer to variable for storing the height in pixels,
* may be NULL
*
* This may differ from SDL_GetWindowSize() if we're rendering to a high-DPI
* drawable, i.e. the window was created with SDL_WINDOW_ALLOW_HIGHDPI on a
* platform with high-DPI support (Apple calls this "Retina"), and not disabled
* by the \c SDL_HINT_VIDEO_HIGHDPI_DISABLED hint.
*
* \sa SDL_GetWindowSize()
* \sa SDL_CreateWindow()
*/
extern DECLSPEC void SDLCALL SDL_Vulkan_GetDrawableSize(SDL_Window * window,
int *w, int *h);
/* @} *//* Vulkan support functions */
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"
#endif /* SDL_vulkan_h_ */