src/video/mir/SDL_mirvulkan.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 03 Jan 2018 10:03:25 -0800
changeset 11811 5d94cb6b24d3
parent 11381 2610f8f0a9c6
child 11839 971881e55d61
permissions -rw-r--r--
Updated copyright for 2018
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2018 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_MIR
    30 
    31 #include "SDL_mirvideo.h"
    32 #include "SDL_mirwindow.h"
    33 #include "SDL_assert.h"
    34 
    35 #include "SDL_loadso.h"
    36 #include "SDL_mirvulkan.h"
    37 #include "SDL_syswm.h"
    38 
    39 int MIR_Vulkan_LoadLibrary(_THIS, const char *path)
    40 {
    41     VkExtensionProperties *extensions = NULL;
    42     Uint32 extensionCount = 0;
    43     SDL_bool hasSurfaceExtension = SDL_FALSE;
    44     SDL_bool hasMIRSurfaceExtension = 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 = "libvulkan.so.1";
    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(Uint32 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_MIR_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
    80             hasMIRSurfaceExtension = 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(!hasMIRSurfaceExtension)
    90     {
    91         SDL_SetError("Installed Vulkan doesn't implement the "
    92                      VK_KHR_MIR_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 
   103 void MIR_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 
   112 SDL_bool MIR_Vulkan_GetInstanceExtensions(_THIS,
   113                                           SDL_Window *window,
   114                                           unsigned *count,
   115                                           const char **names)
   116 {
   117     static const char *const extensionsForMir[] = {
   118         VK_KHR_SURFACE_EXTENSION_NAME, VK_KHR_MIR_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(extensionsForMir),
   127             extensionsForMir);
   128 }
   129 
   130 SDL_bool MIR_Vulkan_CreateSurface(_THIS,
   131                                   SDL_Window *window,
   132                                   VkInstance instance,
   133                                   VkSurfaceKHR *surface)
   134 {
   135     MIR_Window *windowData = (MIR_Window *)window->driverdata;
   136     PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr =
   137         (PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr;
   138     PFN_vkCreateMirSurfaceKHR vkCreateMirSurfaceKHR =
   139         (PFN_vkCreateMirSurfaceKHR)vkGetInstanceProcAddr(
   140                                             (VkInstance)instance,
   141                                             "vkCreateMirSurfaceKHR");
   142     VkMirSurfaceCreateInfoKHR 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(!vkCreateMirSurfaceKHR)
   152     {
   153         SDL_SetError(VK_KHR_MIR_SURFACE_EXTENSION_NAME
   154                      " extension is not enabled in the Vulkan instance.");
   155         return SDL_FALSE;
   156     }
   157     createInfo.sType = VK_STRUCTURE_TYPE_MIR_SURFACE_CREATE_INFO_KHR;
   158     createInfo.pNext = NULL;
   159     createInfo.flags = 0;
   160     createInfo.connection = windowData->mir_data->connection;
   161     createInfo.mirSurface = windowData->window;
   162     result = vkCreateMirSurfaceKHR(instance, &createInfo,
   163                                        NULL, surface);
   164     if(result != VK_SUCCESS)
   165     {
   166         SDL_SetError("vkCreateMirSurfaceKHR failed: %s",
   167                      SDL_Vulkan_GetResultString(result));
   168         return SDL_FALSE;
   169     }
   170     return SDL_TRUE;
   171 }
   172 
   173 #endif
   174 
   175 /* vim: set ts=4 sw=4 expandtab: */