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Add SDL2 sources
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elasota
251
SDL2-2.0.12/src/video/uikit/SDL_uikitvulkan.m
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251
SDL2-2.0.12/src/video/uikit/SDL_uikitvulkan.m
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/*
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* @author Mark Callow, www.edgewise-consulting.com. Based on Jacob Lifshay's
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* SDL_x11vulkan.c.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_VULKAN && SDL_VIDEO_DRIVER_UIKIT
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#include "SDL_uikitvideo.h"
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#include "SDL_uikitwindow.h"
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#include "SDL_assert.h"
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#include "SDL_loadso.h"
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#include "SDL_uikitvulkan.h"
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#include "SDL_uikitmetalview.h"
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#include "SDL_syswm.h"
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#include <dlfcn.h>
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const char* defaultPaths[] = {
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"libvulkan.dylib",
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};
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/* Since libSDL is static, could use RTLD_SELF. Using RTLD_DEFAULT is future
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* proofing. */
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#define DEFAULT_HANDLE RTLD_DEFAULT
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int UIKit_Vulkan_LoadLibrary(_THIS, const char *path)
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{
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VkExtensionProperties *extensions = NULL;
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Uint32 extensionCount = 0;
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SDL_bool hasSurfaceExtension = SDL_FALSE;
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SDL_bool hasIOSSurfaceExtension = SDL_FALSE;
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PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr = NULL;
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if (_this->vulkan_config.loader_handle) {
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return SDL_SetError("Vulkan Portability library is already loaded.");
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}
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/* Load the Vulkan loader library */
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if (!path) {
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path = SDL_getenv("SDL_VULKAN_LIBRARY");
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}
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if (!path) {
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/* Handle the case where Vulkan Portability is linked statically. */
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vkGetInstanceProcAddr =
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(PFN_vkGetInstanceProcAddr)dlsym(DEFAULT_HANDLE,
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"vkGetInstanceProcAddr");
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}
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if (vkGetInstanceProcAddr) {
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_this->vulkan_config.loader_handle = DEFAULT_HANDLE;
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} else {
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const char** paths;
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const char *foundPath = NULL;
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int numPaths;
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int i;
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if (path) {
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paths = &path;
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numPaths = 1;
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} else {
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/* Look for the .dylib packaged with the application instead. */
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paths = defaultPaths;
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numPaths = SDL_arraysize(defaultPaths);
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}
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for (i = 0; i < numPaths && _this->vulkan_config.loader_handle == NULL; i++) {
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foundPath = paths[i];
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_this->vulkan_config.loader_handle = SDL_LoadObject(foundPath);
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}
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if (_this->vulkan_config.loader_handle == NULL) {
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return SDL_SetError("Failed to load Vulkan Portability library");
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}
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SDL_strlcpy(_this->vulkan_config.loader_path, path,
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SDL_arraysize(_this->vulkan_config.loader_path));
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vkGetInstanceProcAddr =
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(PFN_vkGetInstanceProcAddr)SDL_LoadFunction(
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_this->vulkan_config.loader_handle,
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"vkGetInstanceProcAddr");
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}
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if (!vkGetInstanceProcAddr) {
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SDL_SetError("Failed to find %s in either executable or %s: %s",
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"vkGetInstanceProcAddr",
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"linked Vulkan Portability library",
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(const char *) dlerror());
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goto fail;
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}
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_this->vulkan_config.vkGetInstanceProcAddr = (void *)vkGetInstanceProcAddr;
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_this->vulkan_config.vkEnumerateInstanceExtensionProperties =
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(void *)((PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr)(
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VK_NULL_HANDLE, "vkEnumerateInstanceExtensionProperties");
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if (!_this->vulkan_config.vkEnumerateInstanceExtensionProperties) {
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SDL_SetError("No vkEnumerateInstanceExtensionProperties found.");
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goto fail;
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}
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extensions = SDL_Vulkan_CreateInstanceExtensionsList(
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(PFN_vkEnumerateInstanceExtensionProperties)
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_this->vulkan_config.vkEnumerateInstanceExtensionProperties,
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&extensionCount);
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if (!extensions) {
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goto fail;
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}
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for (Uint32 i = 0; i < extensionCount; i++) {
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if (SDL_strcmp(VK_KHR_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0) {
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hasSurfaceExtension = SDL_TRUE;
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} else if (SDL_strcmp(VK_MVK_IOS_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0) {
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hasIOSSurfaceExtension = SDL_TRUE;
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}
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}
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SDL_free(extensions);
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if (!hasSurfaceExtension) {
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SDL_SetError("Installed Vulkan Portability doesn't implement the "
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VK_KHR_SURFACE_EXTENSION_NAME " extension");
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goto fail;
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} else if (!hasIOSSurfaceExtension) {
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SDL_SetError("Installed Vulkan Portability doesn't implement the "
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VK_MVK_IOS_SURFACE_EXTENSION_NAME "extension");
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goto fail;
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}
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return 0;
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fail:
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_this->vulkan_config.loader_handle = NULL;
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return -1;
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}
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void UIKit_Vulkan_UnloadLibrary(_THIS)
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{
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if (_this->vulkan_config.loader_handle) {
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if (_this->vulkan_config.loader_handle != DEFAULT_HANDLE) {
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SDL_UnloadObject(_this->vulkan_config.loader_handle);
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}
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_this->vulkan_config.loader_handle = NULL;
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}
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}
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SDL_bool UIKit_Vulkan_GetInstanceExtensions(_THIS,
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SDL_Window *window,
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unsigned *count,
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const char **names)
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{
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static const char *const extensionsForUIKit[] = {
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VK_KHR_SURFACE_EXTENSION_NAME, VK_MVK_IOS_SURFACE_EXTENSION_NAME
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};
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if (!_this->vulkan_config.loader_handle) {
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SDL_SetError("Vulkan is not loaded");
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return SDL_FALSE;
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}
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return SDL_Vulkan_GetInstanceExtensions_Helper(
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count, names, SDL_arraysize(extensionsForUIKit),
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extensionsForUIKit);
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}
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SDL_bool UIKit_Vulkan_CreateSurface(_THIS,
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SDL_Window *window,
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VkInstance instance,
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VkSurfaceKHR *surface)
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{
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PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr =
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(PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr;
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PFN_vkCreateIOSSurfaceMVK vkCreateIOSSurfaceMVK =
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(PFN_vkCreateIOSSurfaceMVK)vkGetInstanceProcAddr(
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(VkInstance)instance,
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"vkCreateIOSSurfaceMVK");
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VkIOSSurfaceCreateInfoMVK createInfo = {};
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VkResult result;
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SDL_MetalView metalview;
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if (!_this->vulkan_config.loader_handle) {
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SDL_SetError("Vulkan is not loaded");
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return SDL_FALSE;
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}
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if (!vkCreateIOSSurfaceMVK) {
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SDL_SetError(VK_MVK_IOS_SURFACE_EXTENSION_NAME
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" extension is not enabled in the Vulkan instance.");
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return SDL_FALSE;
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}
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metalview = UIKit_Metal_CreateView(_this, window);
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if (metalview == NULL) {
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return SDL_FALSE;
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}
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createInfo.sType = VK_STRUCTURE_TYPE_IOS_SURFACE_CREATE_INFO_MVK;
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createInfo.pNext = NULL;
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createInfo.flags = 0;
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createInfo.pView = (const void *)metalview;
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result = vkCreateIOSSurfaceMVK(instance, &createInfo,
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NULL, surface);
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if (result != VK_SUCCESS) {
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UIKit_Metal_DestroyView(_this, metalview);
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SDL_SetError("vkCreateIOSSurfaceMVK failed: %s",
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SDL_Vulkan_GetResultString(result));
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return SDL_FALSE;
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}
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/* Unfortunately there's no SDL_Vulkan_DestroySurface function we can call
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* Metal_DestroyView from. Right now the metal view's ref count is +2 (one
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* from returning a new view object in CreateView, and one because it's
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* a subview of the window.) If we release the view here to make it +1, it
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* will be destroyed when the window is destroyed. */
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CFBridgingRelease(metalview);
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return SDL_TRUE;
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}
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void UIKit_Vulkan_GetDrawableSize(_THIS, SDL_Window *window, int *w, int *h)
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{
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UIKit_Metal_GetDrawableSize(window, w, h);
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}
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#endif
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/* vi: set ts=4 sw=4 expandtab: */
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