diff options
Diffstat (limited to 'Source/external/SDL2/src/video/uikit/SDL_uikitvulkan.m')
| -rw-r--r-- | Source/external/SDL2/src/video/uikit/SDL_uikitvulkan.m | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/video/uikit/SDL_uikitvulkan.m b/Source/external/SDL2/src/video/uikit/SDL_uikitvulkan.m new file mode 100644 index 0000000..771c7a4 --- /dev/null +++ b/Source/external/SDL2/src/video/uikit/SDL_uikitvulkan.m @@ -0,0 +1,222 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 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_assert.h" + +#include "SDL_loadso.h" +#include "SDL_uikitvulkan.h" +#include "SDL_uikitmetalview.h" +#include "SDL_syswm.h" + +#include <dlfcn.h> + +#define DEFAULT_MOLTENVK "libMoltenVK.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("MoltenVK/Vulkan already loaded"); + } + + /* Load the Vulkan loader library */ + if (!path) { + path = SDL_getenv("SDL_VULKAN_LIBRARY"); + } + + if (!path) { + /* MoltenVK framework, currently, v0.17.0, has a static library and is + * the recommended way to use the package. There is likely no object to + * load. */ + vkGetInstanceProcAddr = + (PFN_vkGetInstanceProcAddr)dlsym(DEFAULT_HANDLE, + "vkGetInstanceProcAddr"); + } + + if (vkGetInstanceProcAddr) { + _this->vulkan_config.loader_handle = DEFAULT_HANDLE; + } else { + if (!path) { + /* Look for the .dylib packaged with the application instead. */ + path = DEFAULT_MOLTENVK; + } + + _this->vulkan_config.loader_handle = SDL_LoadObject(path); + if (!_this->vulkan_config.loader_handle) { + return -1; + } + 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", + DEFAULT_MOLTENVK, + (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 MoltenVK/Vulkan doesn't implement the " + VK_KHR_SURFACE_EXTENSION_NAME " extension"); + goto fail; + } else if (!hasIOSSurfaceExtension) { + SDL_SetError("Installed MoltenVK/Vulkan 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; + + 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; + } + + createInfo.sType = VK_STRUCTURE_TYPE_IOS_SURFACE_CREATE_INFO_MVK; + createInfo.pNext = NULL; + createInfo.flags = 0; + createInfo.pView = (__bridge void *)UIKit_Mtl_AddMetalView(window); + result = vkCreateIOSSurfaceMVK(instance, &createInfo, + NULL, surface); + if (result != VK_SUCCESS) { + SDL_SetError("vkCreateIOSSurfaceMVK failed: %s", + SDL_Vulkan_GetResultString(result)); + return SDL_FALSE; + } + + return SDL_TRUE; +} + +void UIKit_Vulkan_GetDrawableSize(_THIS, SDL_Window *window, int *w, int *h) +{ + UIKit_Mtl_GetDrawableSize(window, w, h); +} + +#endif + +/* vi: set ts=4 sw=4 expandtab: */ |