RWindow::Flash windows.

include/ReWindow/data/WindowsEventLoop.h

@@ -36,13 +36,21 @@ inline LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM l
             case WM_SETFOCUS: {
                 window->processFocusIn();
                 window->SetFlag(WindowFlag::IN_FOCUS, true);
+
+                // TODO actually check if it's flashing.
+                FLASHWINFO fi;
+                fi.cbSize = sizeof(FLASHWINFO);
+                fi.hwnd = hwnd;
+                fi.dwFlags = FLASHW_STOP;
+                fi.uCount = 0;
+                fi.dwTimeout = 0;
+                FlashWindowEx(&fi);
                 break;
             }
 
             case WM_KILLFOCUS: {
                 window->processFocusOut();
                 window->SetFlag(WindowFlag::IN_FOCUS, false);
-                break;
             }
 
             case WM_SETCURSOR: {

main.cpp

@@ -67,7 +67,7 @@ int main() {
 	auto* window = new MyWindow("Test Window", 600, 480);
 	Logger::Debug(std::format("New window '{}' created. width={} height={}", window->GetTitle(), window->GetWidth(), window->GetHeight()));
 
-	window->Open();
+	if (window->Open())
 		Logger::Debug(std::format("Opened window '{}'", window->GetTitle()));
 
 	Logger::Debug("TODO: Cannot set flags until after window is open");

src/platform/windows/OpenGLWindow.cpp

@@ -100,7 +100,7 @@ void OpenGLWindow::SetVsyncEnabled(bool b) {
 }
 
 bool OpenGLWindow::SoftwareRendered() {
-    std::string renderer(reinterpret_cast<const char*>(glGetString(GL_RENDERER)));
+    std::string renderer(reinterpret_cast<const char*>(OpenGL::glGetString(GL_RENDERER)));
     if (renderer.find("llvmpipe"))
         return true;
     if (renderer.find("softpipe"))

src/platform/windows/Window.cpp

@@ -16,6 +16,18 @@ bool open = false;
 void RWindow::Raise() { SetWindowPos(platform->hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE); }
 void RWindow::Lower() { SetWindowPos(platform->hwnd, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE); }
 
+void RWindow::Flash() {
+    if (!GetFlag(WindowFlag::IN_FOCUS)) {
+        FLASHWINFO fi;
+        fi.cbSize = sizeof(FLASHWINFO);
+        fi.hwnd = platform->hwnd;
+        fi.dwFlags = FLASHW_ALL;
+        fi.uCount = 0;
+        fi.dwTimeout = 0;
+        FlashWindowEx(&fi);
+    }
+}
+
 void RWindow::DestroyOSWindowHandle() {
     DestroyWindow(platform->hwnd);
 }