src/video/android/SDL_androidvulkan.c

   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_ANDROID
  30
  31 #include "SDL_androidvideo.h"
  32 #include "SDL_androidwindow.h"
  33 #include "SDL_assert.h"
  34
  35 #include "SDL_loadso.h"
  36 #include "SDL_androidvulkan.h"
  37 #include "SDL_syswm.h"
  38
  39 int Android_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 hasAndroidSurfaceExtension = 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";
  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_ANDROID_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
  80             hasAndroidSurfaceExtension = 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(!hasAndroidSurfaceExtension)
  90     {
  91         SDL_SetError("Installed Vulkan doesn't implement the "
  92                      VK_KHR_ANDROID_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 Android_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 Android_Vulkan_GetInstanceExtensions(_THIS,
 113                                           SDL_Window *window,
 114                                           unsigned *count,
 115                                           const char **names)
 116 {
 117     static const char *const extensionsForAndroid[] = {
 118         VK_KHR_SURFACE_EXTENSION_NAME, VK_KHR_ANDROID_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(extensionsForAndroid),
 127             extensionsForAndroid);
 128 }
 129
 130 SDL_bool Android_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_vkCreateAndroidSurfaceKHR vkCreateAndroidSurfaceKHR =
 139         (PFN_vkCreateAndroidSurfaceKHR)vkGetInstanceProcAddr(
 140                                             (VkInstance)instance,
 141                                             "vkCreateAndroidSurfaceKHR");
 142     VkAndroidSurfaceCreateInfoKHR 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(!vkCreateAndroidSurfaceKHR)
 152     {
 153         SDL_SetError(VK_KHR_ANDROID_SURFACE_EXTENSION_NAME
 154                      " extension is not enabled in the Vulkan instance.");
 155         return SDL_FALSE;
 156     }
 157     SDL_zero(createInfo);
 158     createInfo.sType = VK_STRUCTURE_TYPE_ANDROID_SURFACE_CREATE_INFO_KHR;
 159     createInfo.pNext = NULL;
 160     createInfo.flags = 0;
 161     createInfo.window = windowData->native_window;
 162     result = vkCreateAndroidSurfaceKHR(instance, &createInfo,
 163                                        NULL, surface);
 164     if(result != VK_SUCCESS)
 165     {
 166         SDL_SetError("vkCreateAndroidSurfaceKHR 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: */