src/video/windows/SDL_windowsvulkan.c
author Alex Szpakowski <slime73@gmail.com>
Sat, 10 Nov 2018 16:15:48 -0400
changeset 12404 eb60e952b13f
parent 12201 8bdc4d340419
child 12503 806492103856
permissions -rw-r--r--
Add SDL_TouchDeviceType enum and SDL_GetTouchDeviceType(SDL_TouchID id).

Touch device types include SDL_TOUCH_DEVICE_DIRECT (a touch screen with window-relative coordinates for touches), SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE (a trackpad-style device with absolute device coordinates), and SDL_TOUCH_DEVICE_INDIRECT_RELATIVE (a trackpad-style device with screen cursor-relative coordinates).

Phone screens are an example of a direct device type. Mac trackpads are the indirect-absolute touch device type. The Apple TV remote is an indirect-relative touch device type.
     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_WINDOWS
    30 
    31 #include "SDL_windowsvideo.h"
    32 #include "SDL_windowswindow.h"
    33 #include "SDL_assert.h"
    34 
    35 #include "SDL_loadso.h"
    36 #include "SDL_windowsvulkan.h"
    37 #include "SDL_syswm.h"
    38 
    39 int WIN_Vulkan_LoadLibrary(_THIS, const char *path)
    40 {
    41     VkExtensionProperties *extensions = NULL;
    42     Uint32 extensionCount = 0;
    43     Uint32 i;
    44     SDL_bool hasSurfaceExtension = SDL_FALSE;
    45     SDL_bool hasWin32SurfaceExtension = SDL_FALSE;
    46     PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr = NULL;
    47     if(_this->vulkan_config.loader_handle)
    48         return SDL_SetError("Vulkan already loaded");
    49 
    50     /* Load the Vulkan loader library */
    51     if(!path)
    52         path = SDL_getenv("SDL_VULKAN_LIBRARY");
    53     if(!path)
    54         path = "vulkan-1.dll";
    55     _this->vulkan_config.loader_handle = SDL_LoadObject(path);
    56     if(!_this->vulkan_config.loader_handle)
    57         return -1;
    58     SDL_strlcpy(_this->vulkan_config.loader_path, path,
    59                 SDL_arraysize(_this->vulkan_config.loader_path));
    60     vkGetInstanceProcAddr = (PFN_vkGetInstanceProcAddr)SDL_LoadFunction(
    61         _this->vulkan_config.loader_handle, "vkGetInstanceProcAddr");
    62     if(!vkGetInstanceProcAddr)
    63         goto fail;
    64     _this->vulkan_config.vkGetInstanceProcAddr = (void *)vkGetInstanceProcAddr;
    65     _this->vulkan_config.vkEnumerateInstanceExtensionProperties =
    66         (void *)((PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr)(
    67             VK_NULL_HANDLE, "vkEnumerateInstanceExtensionProperties");
    68     if(!_this->vulkan_config.vkEnumerateInstanceExtensionProperties)
    69         goto fail;
    70     extensions = SDL_Vulkan_CreateInstanceExtensionsList(
    71         (PFN_vkEnumerateInstanceExtensionProperties)
    72             _this->vulkan_config.vkEnumerateInstanceExtensionProperties,
    73         &extensionCount);
    74     if(!extensions)
    75         goto fail;
    76     for(i = 0; i < extensionCount; i++)
    77     {
    78         if(SDL_strcmp(VK_KHR_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
    79             hasSurfaceExtension = SDL_TRUE;
    80         else if(SDL_strcmp(VK_KHR_WIN32_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
    81             hasWin32SurfaceExtension = SDL_TRUE;
    82     }
    83     SDL_free(extensions);
    84     if(!hasSurfaceExtension)
    85     {
    86         SDL_SetError("Installed Vulkan doesn't implement the "
    87                      VK_KHR_SURFACE_EXTENSION_NAME " extension");
    88         goto fail;
    89     }
    90     else if(!hasWin32SurfaceExtension)
    91     {
    92         SDL_SetError("Installed Vulkan doesn't implement the "
    93                      VK_KHR_WIN32_SURFACE_EXTENSION_NAME "extension");
    94         goto fail;
    95     }
    96     return 0;
    97 
    98 fail:
    99     SDL_UnloadObject(_this->vulkan_config.loader_handle);
   100     _this->vulkan_config.loader_handle = NULL;
   101     return -1;
   102 }
   103 
   104 void WIN_Vulkan_UnloadLibrary(_THIS)
   105 {
   106     if(_this->vulkan_config.loader_handle)
   107     {
   108         SDL_UnloadObject(_this->vulkan_config.loader_handle);
   109         _this->vulkan_config.loader_handle = NULL;
   110     }
   111 }
   112 
   113 SDL_bool WIN_Vulkan_GetInstanceExtensions(_THIS,
   114                                           SDL_Window *window,
   115                                           unsigned *count,
   116                                           const char **names)
   117 {
   118     static const char *const extensionsForWin32[] = {
   119         VK_KHR_SURFACE_EXTENSION_NAME, VK_KHR_WIN32_SURFACE_EXTENSION_NAME
   120     };
   121     if(!_this->vulkan_config.loader_handle)
   122     {
   123         SDL_SetError("Vulkan is not loaded");
   124         return SDL_FALSE;
   125     }
   126     return SDL_Vulkan_GetInstanceExtensions_Helper(
   127             count, names, SDL_arraysize(extensionsForWin32),
   128             extensionsForWin32);
   129 }
   130 
   131 SDL_bool WIN_Vulkan_CreateSurface(_THIS,
   132                                   SDL_Window *window,
   133                                   VkInstance instance,
   134                                   VkSurfaceKHR *surface)
   135 {
   136     SDL_WindowData *windowData = (SDL_WindowData *)window->driverdata;
   137     PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr =
   138         (PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr;
   139     PFN_vkCreateWin32SurfaceKHR vkCreateWin32SurfaceKHR =
   140         (PFN_vkCreateWin32SurfaceKHR)vkGetInstanceProcAddr(
   141                                             (VkInstance)instance,
   142                                             "vkCreateWin32SurfaceKHR");
   143     VkWin32SurfaceCreateInfoKHR createInfo;
   144     VkResult result;
   145 
   146     if(!_this->vulkan_config.loader_handle)
   147     {
   148         SDL_SetError("Vulkan is not loaded");
   149         return SDL_FALSE;
   150     }
   151 
   152     if(!vkCreateWin32SurfaceKHR)
   153     {
   154         SDL_SetError(VK_KHR_WIN32_SURFACE_EXTENSION_NAME
   155                      " extension is not enabled in the Vulkan instance.");
   156         return SDL_FALSE;
   157     }
   158     createInfo.sType = VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR;
   159     createInfo.pNext = NULL;
   160     createInfo.flags = 0;
   161     createInfo.hinstance = windowData->hinstance;
   162     createInfo.hwnd = windowData->hwnd;
   163     result = vkCreateWin32SurfaceKHR(instance, &createInfo,
   164                                        NULL, surface);
   165     if(result != VK_SUCCESS)
   166     {
   167         SDL_SetError("vkCreateWin32SurfaceKHR failed: %s",
   168                      SDL_Vulkan_GetResultString(result));
   169         return SDL_FALSE;
   170     }
   171     return SDL_TRUE;
   172 }
   173 
   174 #endif
   175 
   176 /* vi: set ts=4 sw=4 expandtab: */