Initial commit

Lts/Application/THP/THP-Starter/thp_starter.cpp

@@ -0,0 +1,149 @@
+/**
+  * @RDE_HEADER@
+  * Small wrapper to automatically start thp_viewer
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2016-02-29
+  */
+
+#include <windows.h>
+#include <gl/gl.h>
+#include <gl/glu.h>
+
+static void* getGLExtensionFuncPtr(const char *funcName, const char *fallbackFuncName)
+{
+  void* ptr = wglGetProcAddress(funcName);
+  if (ptr)
+    return ptr;
+  return wglGetProcAddress(fallbackFuncName);
+}
+
+static int checkOpenGL(HWND hWnd)
+{
+  HDC hDC = GetDC( hWnd );
+
+  PIXELFORMATDESCRIPTOR pfd;
+  ZeroMemory( &pfd, sizeof( pfd ) );
+  pfd.nSize = sizeof( pfd );
+  pfd.nVersion = 1;
+  pfd.dwFlags  = PFD_DRAW_TO_WINDOW |
+                 PFD_SUPPORT_OPENGL |
+                 PFD_DOUBLEBUFFER   |
+                 PFD_SWAP_EXCHANGE;
+  pfd.iPixelType = PFD_TYPE_RGBA;
+  pfd.cColorBits = 32;
+  pfd.cRedBits   = 8;
+  pfd.cGreenBits = 8;
+  pfd.cBlueBits  = 8;
+  pfd.cAlphaBits = 8;
+  pfd.cDepthBits = 0;
+  pfd.iLayerType = PFD_MAIN_PLANE;
+  int iFormat = ChoosePixelFormat( hDC, &pfd );
+  if( !SetPixelFormat( hDC, iFormat, &pfd ) ) {
+    DWORD dw = GetLastError();
+    int ret = MessageBox(NULL,
+               L"Your system does not support some mandatory OpenGL Functions.\nThe THP-Viewer may not display all things correct!\nDo you really want to start the THP-viewer?",
+               L"THP-Viewer startup",
+               MB_ICONWARNING|MB_YESNO);
+    if(ret == IDNO) {
+      ReleaseDC( hWnd, hDC );
+     return 1;
+    }
+  }
+
+  HGLRC hRC = wglCreateContext( hDC );
+
+  DWORD dw = wglMakeCurrent( hDC, hRC );
+  void *_glCompressedTexImage2D = getGLExtensionFuncPtr( "glCompressedTexImage2D", "glCompressedTexImage2DARB" );
+  if(!_glCompressedTexImage2D) {
+    int ret = MessageBox(NULL,
+               L"Your system does not support the mandatory OpenGL Function glCompressedTexImage2D.\nThe THP-Viewer may not display all things correct!\nDo you really want to start the THP-viewer?",
+               L"THP-Viewer startup",
+               MB_ICONWARNING|MB_YESNO);
+    if(ret == IDNO) {
+      wglDeleteContext( hRC );
+      ReleaseDC( hWnd, hDC );
+      return 1;
+    }
+  }
+
+  wglDeleteContext( hRC );
+  ReleaseDC( hWnd, hDC );
+
+  return 0;
+}
+
+static int startThpViewer(HINSTANCE hInstance)
+{
+  TCHAR fn[MAX_PATH*10];
+  DWORD len = GetModuleFileName(hInstance, fn, sizeof(fn));
+  
+  for(int i = len - 1; i >= 0; --i) {
+    if(fn[i] == '\\')
+      break;
+    fn[i] = '\0';
+  }
+  wcscat(fn, L"thp\\thp_viewer.exe");
+
+  STARTUPINFO si; ZeroMemory(&si, sizeof(si));
+  PROCESS_INFORMATION pi; ZeroMemory(&pi, sizeof(pi));
+  si.cb = sizeof(si);
+  
+  DWORD ret = CreateProcess(fn,
+                            NULL,   // lpCommandLine
+                            NULL,   // lpProcessAttributes
+                            NULL,   // lpThreadAttributes
+                            NULL,   // bInheritHandles
+                            0,      // dwCreationFlags
+                            NULL,   // lpEnvironment
+                            NULL,   // lpCurrentDirectory
+                            &si,    // lpStartupInfo
+                            &pi);   // lpProcessInformation
+
+  if(ret == 0) {
+    MessageBox(NULL,
+               L"Error starting the THP-Viewer!",
+               L"THP-Viewer startup",
+               MB_ICONWARNING|MB_OK);
+    return 1;
+  }
+  // Wait until child process exits.
+  WaitForSingleObject( pi.hProcess, INFINITE );
+
+  // Close process and thread handles. 
+  CloseHandle( pi.hProcess );
+  CloseHandle( pi.hThread );
+
+  return 0;
+}
+
+LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+  return DefWindowProc( hWnd, message, wParam, lParam );
+}
+
+int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
+               LPSTR lpCmdLine, int nCmdShow)
+{
+  WNDCLASS wc;
+  ZeroMemory( &wc, sizeof(wc) );
+  // register window class
+  wc.style = CS_OWNDC;
+  wc.lpfnWndProc = WndProc;
+  wc.hInstance = hInstance;
+  wc.lpszClassName = L"THP_Viewer_startup";
+  RegisterClass( &wc );
+
+  // create main window
+  HWND hWnd = CreateWindow(L"THP_Viewer_startup",
+                           L"THP-Viewer startup", 
+                           WS_CAPTION | WS_POPUPWINDOW,
+                           0, 0, 256, 256,
+                           NULL, NULL, hInstance, NULL );
+
+  int iRet = checkOpenGL(hWnd);
+  if(iRet != 0)
+    return iRet;
+  return startThpViewer(hInstance);
+}