stuff

MaterialX/source/MaterialXRenderHw/SimpleWindowWindows.cpp

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+//
+// Copyright Contributors to the MaterialX Project
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#if defined(_WIN32)
+
+#include <MaterialXRenderHw/SimpleWindow.h>
+#include <MaterialXRenderHw/WindowWrapper.h>
+#include <string>
+
+MATERIALX_NAMESPACE_BEGIN
+
+SimpleWindow::SimpleWindow() :
+    _width(0),
+    _height(0)
+{
+    // Give a unique ID to this window.
+    //
+    static unsigned int windowCount = 1;
+    _id = windowCount;
+    windowCount++;
+
+    // Generate a unique string for our window class.
+    sprintf_s(_windowClassName, "_SW_%u", _id);
+}
+
+// No-op window procedure
+LRESULT CALLBACK NoOpProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
+{
+    switch (msg)
+    {
+        case WM_CLOSE:
+        case WM_DESTROY:
+            break;
+        default:
+            return DefWindowProc(hWnd, msg, wParam, lParam);
+            break;
+    }
+    return 0;
+}
+
+bool SimpleWindow::initialize(const char* title,
+                              unsigned int width, unsigned int height,
+                              void* /*applicationShell*/)
+{
+    HINSTANCE hInstance = GetModuleHandle(NULL);
+
+    // Basic windows class structure
+    //
+    WNDCLASS wc;
+    wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+    wc.lpfnWndProc = (WNDPROC) NoOpProc;
+    wc.cbClsExtra = 0;
+    wc.cbWndExtra = 0;
+    wc.hInstance = hInstance; // Set the instance to this application
+    wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
+    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+    wc.hbrBackground = NULL; // No background required
+    wc.lpszMenuName = NULL;  // No menu required
+    wc.lpszClassName = _windowClassName;
+
+    if (!RegisterClass(&wc))
+    {
+        _id = 0;
+        return false;
+    }
+
+    // Window style and extended style
+    //
+    DWORD dwStyle = WS_OVERLAPPEDWINDOW;
+    DWORD dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
+
+    // Set the rectangle of the client area.
+    RECT WindowRect;
+    WindowRect.left = (long) 0;
+    WindowRect.top = (long) 0;
+    WindowRect.right = (long) width;
+    WindowRect.bottom = (long) height;
+
+    // Calculate the exact window size (including border) so that the
+    // client area has the desired dimensions.
+    //
+    AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle);
+
+    // Attempt to create the window.
+    HWND hWnd = CreateWindowEx(dwExStyle, _windowClassName, title,
+        dwStyle | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
+        0, 0,                               // Window position
+        WindowRect.right - WindowRect.left, // Window width (including borders)
+        WindowRect.bottom - WindowRect.top, // Window height (including borders/title bar)
+        NULL,                               // No parent window
+        NULL,                               // No menu
+        hInstance,                          // Instance
+        NULL);                              // Don't pass anything To WM_CREATE
+
+    if (!hWnd)
+    {
+        _id = 0;
+        return false;
+    }
+
+    _windowWrapper = WindowWrapper::create(hWnd);
+
+    return true;
+}
+
+SimpleWindow::~SimpleWindow()
+{
+    HWND hWnd = _windowWrapper->externalHandle();
+    if (hWnd)
+    {
+        _windowWrapper->release();
+        DestroyWindow(hWnd);
+    }
+
+    UnregisterClass(_windowClassName, GetModuleHandle(NULL));
+}
+
+MATERIALX_NAMESPACE_END
+
+#endif