| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org> |
| |
| 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. |
| */ |
| |
| /* |
| * @author Mark Callow, www.edgewise-consulting.com. Based on Jacob Lifshay's |
| * SDL_x11vulkan.c. |
| */ |
| |
| #include "../../SDL_internal.h" |
| |
| #if SDL_VIDEO_VULKAN && SDL_VIDEO_DRIVER_UIKIT |
| |
| #include "SDL_uikitvideo.h" |
| #include "SDL_uikitwindow.h" |
| |
| #include "SDL_loadso.h" |
| #include "SDL_uikitvulkan.h" |
| #include "SDL_uikitmetalview.h" |
| #include "SDL_syswm.h" |
| |
| #include <dlfcn.h> |
| |
| const char* defaultPaths[] = { |
| "libvulkan.dylib", |
| }; |
| |
| /* Since libSDL is static, could use RTLD_SELF. Using RTLD_DEFAULT is future |
| * proofing. */ |
| #define DEFAULT_HANDLE RTLD_DEFAULT |
| |
| int UIKit_Vulkan_LoadLibrary(_THIS, const char *path) |
| { |
| VkExtensionProperties *extensions = NULL; |
| Uint32 extensionCount = 0; |
| SDL_bool hasSurfaceExtension = SDL_FALSE; |
| SDL_bool hasIOSSurfaceExtension = SDL_FALSE; |
| PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr = NULL; |
| |
| if (_this->vulkan_config.loader_handle) { |
| return SDL_SetError("Vulkan Portability library is already loaded."); |
| } |
| |
| /* Load the Vulkan loader library */ |
| if (!path) { |
| path = SDL_getenv("SDL_VULKAN_LIBRARY"); |
| } |
| |
| if (!path) { |
| /* Handle the case where Vulkan Portability is linked statically. */ |
| vkGetInstanceProcAddr = |
| (PFN_vkGetInstanceProcAddr)dlsym(DEFAULT_HANDLE, |
| "vkGetInstanceProcAddr"); |
| } |
| |
| if (vkGetInstanceProcAddr) { |
| _this->vulkan_config.loader_handle = DEFAULT_HANDLE; |
| } else { |
| const char** paths; |
| const char *foundPath = NULL; |
| int numPaths; |
| int i; |
| |
| if (path) { |
| paths = &path; |
| numPaths = 1; |
| } else { |
| /* Look for the .dylib packaged with the application instead. */ |
| paths = defaultPaths; |
| numPaths = SDL_arraysize(defaultPaths); |
| } |
| |
| for (i = 0; i < numPaths && _this->vulkan_config.loader_handle == NULL; i++) { |
| foundPath = paths[i]; |
| _this->vulkan_config.loader_handle = SDL_LoadObject(foundPath); |
| } |
| |
| if (_this->vulkan_config.loader_handle == NULL) { |
| return SDL_SetError("Failed to load Vulkan Portability library"); |
| } |
| |
| SDL_strlcpy(_this->vulkan_config.loader_path, path, |
| SDL_arraysize(_this->vulkan_config.loader_path)); |
| vkGetInstanceProcAddr = |
| (PFN_vkGetInstanceProcAddr)SDL_LoadFunction( |
| _this->vulkan_config.loader_handle, |
| "vkGetInstanceProcAddr"); |
| } |
| |
| if (!vkGetInstanceProcAddr) { |
| SDL_SetError("Failed to find %s in either executable or %s: %s", |
| "vkGetInstanceProcAddr", |
| "linked Vulkan Portability library", |
| (const char *) dlerror()); |
| goto fail; |
| } |
| |
| _this->vulkan_config.vkGetInstanceProcAddr = (void *)vkGetInstanceProcAddr; |
| _this->vulkan_config.vkEnumerateInstanceExtensionProperties = |
| (void *)((PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr)( |
| VK_NULL_HANDLE, "vkEnumerateInstanceExtensionProperties"); |
| |
| if (!_this->vulkan_config.vkEnumerateInstanceExtensionProperties) { |
| SDL_SetError("No vkEnumerateInstanceExtensionProperties found."); |
| goto fail; |
| } |
| |
| extensions = SDL_Vulkan_CreateInstanceExtensionsList( |
| (PFN_vkEnumerateInstanceExtensionProperties) |
| _this->vulkan_config.vkEnumerateInstanceExtensionProperties, |
| &extensionCount); |
| |
| if (!extensions) { |
| goto fail; |
| } |
| |
| for (Uint32 i = 0; i < extensionCount; i++) { |
| if (SDL_strcmp(VK_KHR_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0) { |
| hasSurfaceExtension = SDL_TRUE; |
| } else if (SDL_strcmp(VK_MVK_IOS_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0) { |
| hasIOSSurfaceExtension = SDL_TRUE; |
| } |
| } |
| |
| SDL_free(extensions); |
| |
| if (!hasSurfaceExtension) { |
| SDL_SetError("Installed Vulkan Portability doesn't implement the " |
| VK_KHR_SURFACE_EXTENSION_NAME " extension"); |
| goto fail; |
| } else if (!hasIOSSurfaceExtension) { |
| SDL_SetError("Installed Vulkan Portability doesn't implement the " |
| VK_MVK_IOS_SURFACE_EXTENSION_NAME "extension"); |
| goto fail; |
| } |
| |
| return 0; |
| |
| fail: |
| _this->vulkan_config.loader_handle = NULL; |
| return -1; |
| } |
| |
| void UIKit_Vulkan_UnloadLibrary(_THIS) |
| { |
| if (_this->vulkan_config.loader_handle) { |
| if (_this->vulkan_config.loader_handle != DEFAULT_HANDLE) { |
| SDL_UnloadObject(_this->vulkan_config.loader_handle); |
| } |
| _this->vulkan_config.loader_handle = NULL; |
| } |
| } |
| |
| SDL_bool UIKit_Vulkan_GetInstanceExtensions(_THIS, |
| SDL_Window *window, |
| unsigned *count, |
| const char **names) |
| { |
| static const char *const extensionsForUIKit[] = { |
| VK_KHR_SURFACE_EXTENSION_NAME, VK_MVK_IOS_SURFACE_EXTENSION_NAME |
| }; |
| if (!_this->vulkan_config.loader_handle) { |
| SDL_SetError("Vulkan is not loaded"); |
| return SDL_FALSE; |
| } |
| |
| return SDL_Vulkan_GetInstanceExtensions_Helper( |
| count, names, SDL_arraysize(extensionsForUIKit), |
| extensionsForUIKit); |
| } |
| |
| SDL_bool UIKit_Vulkan_CreateSurface(_THIS, |
| SDL_Window *window, |
| VkInstance instance, |
| VkSurfaceKHR *surface) |
| { |
| PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr = |
| (PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr; |
| PFN_vkCreateIOSSurfaceMVK vkCreateIOSSurfaceMVK = |
| (PFN_vkCreateIOSSurfaceMVK)vkGetInstanceProcAddr( |
| (VkInstance)instance, |
| "vkCreateIOSSurfaceMVK"); |
| VkIOSSurfaceCreateInfoMVK createInfo = {}; |
| VkResult result; |
| SDL_MetalView metalview; |
| |
| if (!_this->vulkan_config.loader_handle) { |
| SDL_SetError("Vulkan is not loaded"); |
| return SDL_FALSE; |
| } |
| |
| if (!vkCreateIOSSurfaceMVK) { |
| SDL_SetError(VK_MVK_IOS_SURFACE_EXTENSION_NAME |
| " extension is not enabled in the Vulkan instance."); |
| return SDL_FALSE; |
| } |
| |
| metalview = UIKit_Metal_CreateView(_this, window); |
| if (metalview == NULL) { |
| return SDL_FALSE; |
| } |
| |
| createInfo.sType = VK_STRUCTURE_TYPE_IOS_SURFACE_CREATE_INFO_MVK; |
| createInfo.pNext = NULL; |
| createInfo.flags = 0; |
| createInfo.pView = (const void *)metalview; |
| result = vkCreateIOSSurfaceMVK(instance, &createInfo, |
| NULL, surface); |
| if (result != VK_SUCCESS) { |
| UIKit_Metal_DestroyView(_this, metalview); |
| SDL_SetError("vkCreateIOSSurfaceMVK failed: %s", |
| SDL_Vulkan_GetResultString(result)); |
| return SDL_FALSE; |
| } |
| |
| /* Unfortunately there's no SDL_Vulkan_DestroySurface function we can call |
| * Metal_DestroyView from. Right now the metal view's ref count is +2 (one |
| * from returning a new view object in CreateView, and one because it's |
| * a subview of the window.) If we release the view here to make it +1, it |
| * will be destroyed when the window is destroyed. */ |
| CFBridgingRelease(metalview); |
| |
| return SDL_TRUE; |
| } |
| |
| void UIKit_Vulkan_GetDrawableSize(_THIS, SDL_Window *window, int *w, int *h) |
| { |
| UIKit_Metal_GetDrawableSize(_this, window, w, h); |
| } |
| |
| #endif |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
