Fix building love on Windows for SDL3-3.1.0

src/love.cpp

@@ -26,6 +26,10 @@
 
 #ifdef LOVE_BUILD_EXE
 
+#if SDL_VERSION_ATLEAST(3, 0, 0)
+#include <SDL_main.h>
+#endif
+
 // Lua
 extern "C" {
 	#include <lua.h>

src/modules/event/sdl/Event.cpp

@@ -383,7 +383,11 @@ Message *Event::convert(const SDL_Event &e)
 		// (and SDL doesn't differentiate.) Non-screen touch devices like Mac
 		// trackpads won't give touch coords in the window's coordinate-space.
 #ifndef LOVE_MACOS
-		touchinfo.id = (int64) e.tfinger.fingerId;
+#if SDL_VERSION_ATLEAST(3, 0, 0)
+		touchinfo.id = (int64) e.tfinger.fingerID;
+#else
+		touchinfo.id = (int64)e.tfinger.fingerId;
+#endif
 		touchinfo.x = e.tfinger.x;
 		touchinfo.y = e.tfinger.y;
 		touchinfo.dx = e.tfinger.dx;

src/modules/graphics/vulkan/Graphics.cpp

@@ -29,6 +29,7 @@
 #include "Shader.h"
 #include "Vulkan.h"
 
+#include <SDL_version.h>
 #include <SDL_vulkan.h>
 
 #include <algorithm>
@@ -120,10 +121,18 @@ Graphics::Graphics()
 	// GetInstanceExtensions works with a null window parameter as long as
 	// SDL_Vulkan_LoadLibrary has been called (which we do earlier).
 	unsigned int count;
+#if SDL_VERSION_ATLEAST(3, 0, 0)
+	char const* const* extensions_string = SDL_Vulkan_GetInstanceExtensions(&count);
+	if (extensions_string == nullptr)
+		throw love::Exception("couldn't retrieve sdl vulkan extensions");
+
+	std::vector<const char*> extensions(extensions_string, extensions_string + count);
+#else
 	if (SDL_Vulkan_GetInstanceExtensions(nullptr, &count, nullptr) != SDL_TRUE)
 		throw love::Exception("couldn't retrieve sdl vulkan extensions");
 
 	std::vector<const char*> extensions = {};
+#endif
 
 	checkOptionalInstanceExtensions(optionalInstanceExtensions);
 
@@ -132,11 +141,13 @@ Graphics::Graphics()
 	if (optionalInstanceExtensions.debugInfo)
 		extensions.push_back(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
 
+#if !SDL_VERSION_ATLEAST(3, 0, 0)
 	size_t additional_extension_count = extensions.size();
 	extensions.resize(additional_extension_count + count);
 
 	if (SDL_Vulkan_GetInstanceExtensions(nullptr, &count, extensions.data() + additional_extension_count) != SDL_TRUE)
 		throw love::Exception("couldn't retrieve sdl vulkan extensions");
+#endif
 
 	createInfo.enabledExtensionCount = static_cast<uint32_t>(extensions.size());
 	createInfo.ppEnabledExtensionNames = extensions.data();
@@ -1769,8 +1780,13 @@ void Graphics::createSurface()
 {
 	auto window = Module::getInstance<love::window::Window>(M_WINDOW);
 	const void *handle = window->getHandle();
+#if SDL_VERSION_ATLEAST(3, 0, 0)
+	if (SDL_Vulkan_CreateSurface((SDL_Window*)handle, instance, nullptr, &surface) != SDL_TRUE)
+		throw love::Exception("failed to create window surface");
+#else
 	if (SDL_Vulkan_CreateSurface((SDL_Window*)handle, instance, &surface) != SDL_TRUE)
 		throw love::Exception("failed to create window surface");
+#endif
 }
 
 SwapChainSupportDetails Graphics::querySwapChainSupport(VkPhysicalDevice device)

src/modules/window/sdl/Window.cpp

@@ -1472,15 +1472,27 @@ void Window::swapBuffers()
 					dwmRefreshRate = (double)info.rateRefresh.uiNumerator / (double)info.rateRefresh.uiDenominator;
 
 				SDL_DisplayMode dmode = {};
+#if SDL_VERSION_ATLEAST(3, 0, 0)
+				SDL_DisplayID display = SDL_GetDisplayForWindow(window);
+				const SDL_DisplayMode* modePtr = SDL_GetCurrentDisplayMode(display);
+				if (modePtr)
+					dmode = *modePtr;
+#else
 				int displayindex = SDL_GetWindowDisplayIndex(window);
 
 				if (displayindex >= 0)
 					SDL_GetCurrentDisplayMode(displayindex, &dmode);
+#endif
 
 				if (dmode.refresh_rate > 0 && dwmRefreshRate > 0 && (fabs(dmode.refresh_rate - dwmRefreshRate) < 2))
 				{
 					SDL_GL_SetSwapInterval(0);
+#if SDL_VERSION_ATLEAST(3, 0, 0)
+					int interval = 0;
+					if (SDL_GL_GetSwapInterval(&interval) == 0 && interval == 0)
+#else
 					if (SDL_GL_GetSwapInterval() == 0)
+#endif
 						useDwmFlush = true;
 					else
 						SDL_GL_SetSwapInterval(swapInterval);
@@ -1735,26 +1747,30 @@ void Window::requestAttention(bool continuous)
 	if (hasFocus())
 		return;
 
+	FLASHWINFO flashinfo = { sizeof(FLASHWINFO) };
+
+#if SDL_VERSION_ATLEAST(3, 0, 0)
+	flashinfo.hwnd = (HWND)SDL_GetProperty(SDL_GetWindowProperties(window), SDL_PROP_WINDOW_WIN32_HWND_POINTER, NULL);
+#else
 	SDL_SysWMinfo wminfo = {};
 	SDL_VERSION(&wminfo.version);
+	if (!SDL_GetWindowWMInfo(window, &wminfo))
+		return;
 
-	if (SDL_GetWindowWMInfo(window, &wminfo))
-	{
-		FLASHWINFO flashinfo = {};
-		flashinfo.cbSize = sizeof(FLASHWINFO);
-		flashinfo.hwnd = wminfo.info.win.window;
-		flashinfo.uCount = 1;
-		flashinfo.dwFlags = FLASHW_ALL;
+	flashinfo.hwnd = wminfo.info.win.window;
+#endif
 
-		if (continuous)
-		{
-			flashinfo.uCount = 0;
-			flashinfo.dwFlags |= FLASHW_TIMERNOFG;
-		}
+	flashinfo.uCount = 1;
+	flashinfo.dwFlags = FLASHW_ALL;
 
-		FlashWindowEx(&flashinfo);
+	if (continuous)
+	{
+		flashinfo.uCount = 0;
+		flashinfo.dwFlags |= FLASHW_TIMERNOFG;
 	}
 
+	FlashWindowEx(&flashinfo);
+
 #elif defined(LOVE_MACOS)
 
 	love::macos::requestAttention(continuous);