1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 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 Wladimir J. van der Laan. Based on Jacob Lifshay's
24 * SDL_x11vulkan.c, Mark Callow's SDL_androidvulkan.c, and
25 * the FSL demo framework.
26 */
27
28 #include "../../SDL_internal.h"
29
30 #if SDL_VIDEO_VULKAN && SDL_VIDEO_DRIVER_VIVANTE
31
32 #include "SDL_vivantevideo.h"
33 #include "SDL_assert.h"
34
35 #include "SDL_loadso.h"
36 #include "SDL_vivantevulkan.h"
37 #include "SDL_syswm.h"
38
VIVANTE_Vulkan_LoadLibrary(_THIS,const char * path)39 int VIVANTE_Vulkan_LoadLibrary(_THIS, const char *path)
40 {
41 VkExtensionProperties *extensions = NULL;
42 Uint32 i, extensionCount = 0;
43 SDL_bool hasSurfaceExtension = SDL_FALSE;
44 SDL_bool hasDisplayExtension = 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 {
54 /* If no path set, try Vivante fb vulkan driver explicitly */
55 path = "libvulkan-fb.so";
56 _this->vulkan_config.loader_handle = SDL_LoadObject(path);
57 if(!_this->vulkan_config.loader_handle)
58 {
59 /* If that couldn't be loaded, fall back to default name */
60 path = "libvulkan.so";
61 _this->vulkan_config.loader_handle = SDL_LoadObject(path);
62 }
63 } else {
64 _this->vulkan_config.loader_handle = SDL_LoadObject(path);
65 }
66 if(!_this->vulkan_config.loader_handle)
67 return -1;
68 SDL_strlcpy(_this->vulkan_config.loader_path, path,
69 SDL_arraysize(_this->vulkan_config.loader_path));
70 SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "vivante: Loaded vulkan driver %s", path);
71 vkGetInstanceProcAddr = (PFN_vkGetInstanceProcAddr)SDL_LoadFunction(
72 _this->vulkan_config.loader_handle, "vkGetInstanceProcAddr");
73 if(!vkGetInstanceProcAddr)
74 goto fail;
75 _this->vulkan_config.vkGetInstanceProcAddr = (void *)vkGetInstanceProcAddr;
76 _this->vulkan_config.vkEnumerateInstanceExtensionProperties =
77 (void *)((PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr)(
78 VK_NULL_HANDLE, "vkEnumerateInstanceExtensionProperties");
79 if(!_this->vulkan_config.vkEnumerateInstanceExtensionProperties)
80 goto fail;
81 extensions = SDL_Vulkan_CreateInstanceExtensionsList(
82 (PFN_vkEnumerateInstanceExtensionProperties)
83 _this->vulkan_config.vkEnumerateInstanceExtensionProperties,
84 &extensionCount);
85 if(!extensions)
86 goto fail;
87 for(i = 0; i < extensionCount; i++)
88 {
89 if(SDL_strcmp(VK_KHR_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
90 hasSurfaceExtension = SDL_TRUE;
91 else if(SDL_strcmp(VK_KHR_DISPLAY_EXTENSION_NAME, extensions[i].extensionName) == 0)
92 hasDisplayExtension = SDL_TRUE;
93 }
94 SDL_free(extensions);
95 if(!hasSurfaceExtension)
96 {
97 SDL_SetError("Installed Vulkan doesn't implement the "
98 VK_KHR_SURFACE_EXTENSION_NAME " extension");
99 goto fail;
100 }
101 else if(!hasDisplayExtension)
102 {
103 SDL_SetError("Installed Vulkan doesn't implement the "
104 VK_KHR_DISPLAY_EXTENSION_NAME "extension");
105 goto fail;
106 }
107 return 0;
108
109 fail:
110 SDL_UnloadObject(_this->vulkan_config.loader_handle);
111 _this->vulkan_config.loader_handle = NULL;
112 return -1;
113 }
114
VIVANTE_Vulkan_UnloadLibrary(_THIS)115 void VIVANTE_Vulkan_UnloadLibrary(_THIS)
116 {
117 if(_this->vulkan_config.loader_handle)
118 {
119 SDL_UnloadObject(_this->vulkan_config.loader_handle);
120 _this->vulkan_config.loader_handle = NULL;
121 }
122 }
123
VIVANTE_Vulkan_GetInstanceExtensions(_THIS,SDL_Window * window,unsigned * count,const char ** names)124 SDL_bool VIVANTE_Vulkan_GetInstanceExtensions(_THIS,
125 SDL_Window *window,
126 unsigned *count,
127 const char **names)
128 {
129 static const char *const extensionsForVivante[] = {
130 VK_KHR_SURFACE_EXTENSION_NAME, VK_KHR_DISPLAY_EXTENSION_NAME
131 };
132 if(!_this->vulkan_config.loader_handle)
133 {
134 SDL_SetError("Vulkan is not loaded");
135 return SDL_FALSE;
136 }
137 return SDL_Vulkan_GetInstanceExtensions_Helper(
138 count, names, SDL_arraysize(extensionsForVivante),
139 extensionsForVivante);
140 }
141
VIVANTE_Vulkan_CreateSurface(_THIS,SDL_Window * window,VkInstance instance,VkSurfaceKHR * surface)142 SDL_bool VIVANTE_Vulkan_CreateSurface(_THIS,
143 SDL_Window *window,
144 VkInstance instance,
145 VkSurfaceKHR *surface)
146 {
147 if(!_this->vulkan_config.loader_handle)
148 {
149 SDL_SetError("Vulkan is not loaded");
150 return SDL_FALSE;
151 }
152 return SDL_Vulkan_Display_CreateSurface(_this->vulkan_config.vkGetInstanceProcAddr, instance, surface);
153 }
154
155 #endif
156
157 /* vi: set ts=4 sw=4 expandtab: */
158
159