Discussion:
[PATCH 2 of 3] add vulkan implementation for x11
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Jacob Lifshay
2017-02-21 08:40:05 UTC
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# HG changeset patch
# User Jacob Lifshay <***@gmail.com>
# Date 1487661491 28800
# Mon Feb 20 23:18:11 2017 -0800
# Node ID 5046b8390345b414fabfe20bf6516a58101f3ba9
# Parent fd24ec69f7b848894158a1c19f5d4b05b68145fa
add vulkan implementation for x11

diff -r fd24ec69f7b8 -r 5046b8390345 src/video/x11/SDL_x11video.c
--- a/src/video/x11/SDL_x11video.c Mon Feb 20 23:18:11 2017 -0800
+++ b/src/video/x11/SDL_x11video.c Mon Feb 20 23:18:11 2017 -0800
@@ -39,6 +39,8 @@
#include "SDL_x11opengles.h"
#endif

+#include "SDL_x11vulkan.h"
+
/* Initialization/Query functions */
static int X11_VideoInit(_THIS);
static void X11_VideoQuit(_THIS);
@@ -106,6 +108,9 @@
X11_DeleteDevice(SDL_VideoDevice * device)
{
SDL_VideoData *data = (SDL_VideoData *) device->driverdata;
+ if (device->vulkan_config.loader_handle) {
+ device->Vulkan_UnloadLibrary(device);
+ }
if (data->display) {
X11_XCloseDisplay(data->display);
}
@@ -290,6 +295,13 @@

device->free = X11_DeleteDevice;

+#if SDL_VULKAN_SUPPORTED
+ device->Vulkan_LoadLibrary = X11_Vulkan_LoadLibrary;
+ device->Vulkan_UnloadLibrary = X11_Vulkan_UnloadLibrary;
+ device->Vulkan_GetInstanceExtensions = X11_Vulkan_GetInstanceExtensions;
+ device->Vulkan_CreateSurface = X11_Vulkan_CreateSurface;
+#endif
+
return device;
}

diff -r fd24ec69f7b8 -r 5046b8390345 src/video/x11/SDL_x11video.h
--- a/src/video/x11/SDL_x11video.h Mon Feb 20 23:18:11 2017 -0800
+++ b/src/video/x11/SDL_x11video.h Mon Feb 20 23:18:11 2017 -0800
@@ -68,6 +68,7 @@
#include "SDL_x11mouse.h"
#include "SDL_x11opengl.h"
#include "SDL_x11window.h"
+#include "SDL_x11vulkan.h"

/* Private display data */

@@ -139,6 +140,12 @@
KeyCode filter_code;
Time filter_time;

+#if SDL_VULKAN_SUPPORTED
+ /* Vulkan variables only valid if _this->vulkan_config.loader_handle is not NULL */
+ void *vulkan_xlib_xcb_library;
+ PFN_XGetXCBConnection vulkan_XGetXCBConnection;
+#endif
+
} SDL_VideoData;

extern SDL_bool X11_UseDirectColorVisuals(void);
diff -r fd24ec69f7b8 -r 5046b8390345 src/video/x11/SDL_x11vulkan.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/x11/SDL_x11vulkan.c Mon Feb 20 23:18:11 2017 -0800
@@ -0,0 +1,231 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2016 Sam Lantinga <***@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.
+*/
+#include "../../SDL_internal.h"
+
+#if SDL_VIDEO_DRIVER_X11
+
+#include "SDL_x11video.h"
+#include "SDL_assert.h"
+
+#include "SDL_loadso.h"
+#include "SDL_x11vulkan.h"
+
+#if SDL_VULKAN_SUPPORTED
+
+int X11_Vulkan_LoadLibrary(_THIS, const char *path)
+{
+ SDL_VideoData *videoData = (SDL_VideoData *)_this->driverdata;
+ VkExtensionProperties *extensions = NULL;
+ Uint32 extensionCount = 0;
+ SDL_bool hasSurfaceExtension = SDL_FALSE;
+ SDL_bool hasXlibSurfaceExtension = SDL_FALSE;
+ SDL_bool hasXCBSurfaceExtension = SDL_FALSE;
+ PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr = NULL;
+ if(_this->vulkan_config.loader_handle)
+ return SDL_SetError("Vulkan already loaded");
+
+ /* Load the Vulkan loader library */
+ if(!path)
+ path = SDL_getenv("SDL_VULKAN_LIBRARY");
+ if(!path)
+ path = "libvulkan.so.1";
+ _this->vulkan_config.loader_handle = SDL_LoadObject(path);
+ if(!_this->vulkan_config.loader_handle)
+ return -1;
+ SDL_strlcpy(_this->gl_config.driver_path, path, SDL_arraysize(_this->gl_config.driver_path));
+ vkGetInstanceProcAddr = (PFN_vkGetInstanceProcAddr)SDL_LoadFunction(
+ _this->vulkan_config.loader_handle, "vkGetInstanceProcAddr");
+ if(!vkGetInstanceProcAddr)
+ 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)
+ 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_KHR_XCB_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
+ hasXCBSurfaceExtension = SDL_TRUE;
+ else if(SDL_strcmp(VK_KHR_XLIB_SURFACE_EXTENSION_NAME, extensions[i].extensionName) == 0)
+ hasXlibSurfaceExtension = SDL_TRUE;
+ }
+ SDL_free(extensions);
+ if(!hasSurfaceExtension)
+ {
+ SDL_SetError("Vulkan doesn't implement the " VK_KHR_SURFACE_EXTENSION_NAME " extension");
+ goto fail;
+ }
+ if(hasXlibSurfaceExtension)
+ {
+ videoData->vulkan_xlib_xcb_library = NULL;
+ }
+ else if(!hasXCBSurfaceExtension)
+ {
+ SDL_SetError("Vulkan doesn't implement either of the " VK_KHR_XCB_SURFACE_EXTENSION_NAME
+ " extension or the " VK_KHR_XLIB_SURFACE_EXTENSION_NAME " extension");
+ goto fail;
+ }
+ else
+ {
+ const char *libX11XCBLibraryName = SDL_getenv("SDL_X11_XCB_LIBRARY");
+ if(!libX11XCBLibraryName)
+ libX11XCBLibraryName = "libX11-xcb.so";
+ videoData->vulkan_xlib_xcb_library = SDL_LoadObject(libX11XCBLibraryName);
+ if(!videoData->vulkan_xlib_xcb_library)
+ goto fail;
+ videoData->vulkan_XGetXCBConnection =
+ SDL_LoadFunction(videoData->vulkan_xlib_xcb_library, "XGetXCBConnection");
+ if(!videoData->vulkan_XGetXCBConnection)
+ {
+ SDL_UnloadObject(videoData->vulkan_xlib_xcb_library);
+ goto fail;
+ }
+ }
+ return 0;
+
+fail:
+ SDL_UnloadObject(_this->vulkan_config.loader_handle);
+ _this->vulkan_config.loader_handle = NULL;
+ return -1;
+}
+
+void X11_Vulkan_UnloadLibrary(_THIS)
+{
+ SDL_VideoData *videoData = (SDL_VideoData *)_this->driverdata;
+ if(_this->vulkan_config.loader_handle)
+ {
+ if(videoData->vulkan_xlib_xcb_library)
+ SDL_UnloadObject(videoData->vulkan_xlib_xcb_library);
+ SDL_UnloadObject(_this->vulkan_config.loader_handle);
+ _this->vulkan_config.loader_handle = NULL;
+ }
+}
+
+SDL_bool X11_Vulkan_GetInstanceExtensions(_THIS,
+ SDL_Window *window,
+ unsigned *count,
+ const char **names)
+{
+ SDL_VideoData *videoData = (SDL_VideoData *)_this->driverdata;
+ if(!_this->vulkan_config.loader_handle)
+ {
+ SDL_SetError("Vulkan is not loaded");
+ return SDL_FALSE;
+ }
+ if(videoData->vulkan_xlib_xcb_library)
+ {
+ static const char *const extensionsForXCB[] = {
+ VK_KHR_SURFACE_EXTENSION_NAME, VK_KHR_XCB_SURFACE_EXTENSION_NAME,
+ };
+ return SDL_Vulkan_GetInstanceExtensions_Helper(
+ count, names, SDL_arraysize(extensionsForXCB), extensionsForXCB);
+ }
+ else
+ {
+ static const char *const extensionsForXlib[] = {
+ VK_KHR_SURFACE_EXTENSION_NAME, VK_KHR_XLIB_SURFACE_EXTENSION_NAME,
+ };
+ return SDL_Vulkan_GetInstanceExtensions_Helper(
+ count, names, SDL_arraysize(extensionsForXlib), extensionsForXlib);
+ }
+}
+
+SDL_bool X11_Vulkan_CreateSurface(_THIS,
+ SDL_Window *window,
+ SDL_vulkanInstance instance,
+ SDL_vulkanSurface *surface)
+{
+ SDL_VideoData *videoData = (SDL_VideoData *)_this->driverdata;
+ SDL_WindowData *windowData = (SDL_WindowData *)window->driverdata;
+ PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr;
+ if(!_this->vulkan_config.loader_handle)
+ {
+ SDL_SetError("Vulkan is not loaded");
+ return SDL_FALSE;
+ }
+ vkGetInstanceProcAddr = (PFN_vkGetInstanceProcAddr)_this->vulkan_config.vkGetInstanceProcAddr;
+ if(videoData->vulkan_xlib_xcb_library)
+ {
+ PFN_vkCreateXcbSurfaceKHR vkCreateXcbSurfaceKHR =
+ (PFN_vkCreateXcbSurfaceKHR)vkGetInstanceProcAddr((VkInstance)instance,
+ "vkCreateXcbSurfaceKHR");
+ VkXcbSurfaceCreateInfoKHR createInfo = {};
+ VkResult result;
+ if(!vkCreateXcbSurfaceKHR)
+ {
+ SDL_SetError("Vulkan instance does not have " VK_KHR_XCB_SURFACE_EXTENSION_NAME
+ " extension");
+ return SDL_FALSE;
+ }
+ createInfo.sType = VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR;
+ createInfo.connection = videoData->vulkan_XGetXCBConnection(videoData->display);
+ if(!createInfo.connection)
+ {
+ SDL_SetError("XGetXCBConnection failed");
+ return SDL_FALSE;
+ }
+ createInfo.window = (xcb_window_t)windowData->xwindow;
+ result = vkCreateXcbSurfaceKHR(instance, &createInfo, NULL, (VkSurfaceKHR *)surface);
+ if(result != VK_SUCCESS)
+ {
+ SDL_SetError("vkCreateXcbSurfaceKHR failed: %s", SDL_Vulkan_GetResultString(result));
+ return SDL_FALSE;
+ }
+ return SDL_TRUE;
+ }
+ else
+ {
+ PFN_vkCreateXlibSurfaceKHR vkCreateXlibSurfaceKHR =
+ (PFN_vkCreateXlibSurfaceKHR)vkGetInstanceProcAddr((VkInstance)instance,
+ "vkCreateXlibSurfaceKHR");
+ VkXlibSurfaceCreateInfoKHR createInfo = {};
+ VkResult result;
+ if(!vkCreateXlibSurfaceKHR)
+ {
+ SDL_SetError("Vulkan instance does not have " VK_KHR_XLIB_SURFACE_EXTENSION_NAME
+ " extension");
+ return SDL_FALSE;
+ }
+ createInfo.sType = VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR;
+ createInfo.dpy = videoData->display;
+ createInfo.window = (xcb_window_t)windowData->xwindow;
+ result = vkCreateXlibSurfaceKHR(instance, &createInfo, NULL, (VkSurfaceKHR *)surface);
+ if(result != VK_SUCCESS)
+ {
+ SDL_SetError("vkCreateXlibSurfaceKHR failed: %s", SDL_Vulkan_GetResultString(result));
+ return SDL_FALSE;
+ }
+ return SDL_TRUE;
+ }
+}
+
+#endif
+
+#endif
diff -r fd24ec69f7b8 -r 5046b8390345 src/video/x11/SDL_x11vulkan.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/x11/SDL_x11vulkan.h Mon Feb 20 23:18:11 2017 -0800
@@ -0,0 +1,45 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2016 Sam Lantinga <***@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.
+*/
+#include "../../SDL_internal.h"
+
+#ifndef _SDL_x11vulkan_h
+#define _SDL_x11vulkan_h
+
+#include "../SDL_vulkan.h"
+
+#if SDL_VULKAN_SUPPORTED
+
+int X11_Vulkan_LoadLibrary(_THIS, const char *path);
+void X11_Vulkan_UnloadLibrary(_THIS);
+SDL_bool X11_Vulkan_GetInstanceExtensions(_THIS,
+ SDL_Window *window,
+ unsigned *count,
+ const char **names);
+SDL_bool X11_Vulkan_CreateSurface(_THIS,
+ SDL_Window *window,
+ SDL_vulkanInstance instance,
+ SDL_vulkanSurface *surface);
+
+#endif
+
+#endif /* _SDL_x11vulkan_h */
+
+/* vi: set ts=4 sw=4 expandtab: */

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