I have a small problem while trying to test a very simple direct-x application even though it compiles using Mingw-64( with direct-x 64bit libraries ) and Mingw-32 the application will crash or simply not work at all ( no error message, just a black screen ). The applications compiles and works as intended on MinGw ( using gcc 4.6.2 ) and VS2010.
We need more info, best would be a small compilable code sample reproducing the problem. If that's not possible, at least the full code that exhibits the problem.
Here is the sample code, the end result should be a blue background window, what it actually happens just the black terminal window or the program will crash. ( i took the code from http://www.directxtutorial.com/tutorial9/b-direct3dbasics/dx9b1.aspx ). this happens with any direct-x application that i try to compile (while working with mingw)
// include the basic windows header files and the Direct3D header file
// global declarations
LPDIRECT3D9 d3d; // the pointer to our Direct3D interface
LPDIRECT3DDEVICE9 d3ddev; // the pointer to the device class
// function prototypes
void initD3D(HWND hWnd); // sets up and initializes Direct3D
void render_frame(void); // renders a single frame
void cleanD3D(void); // closes Direct3D and releases memory
// the WindowProc function prototype
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
// the entry point for any Windows program
int WINAPI WinMain(HINSTANCE hInstance,
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
wc.lpszClassName = "WindowClass";
hWnd = CreateWindowEx(NULL,
"Our First Direct3D Program",
// set up and initialize Direct3D
// enter the main loop:
while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
if(msg.message == WM_QUIT)
// clean up DirectX and COM
// this is the main message handler for the program
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
return DefWindowProc (hWnd, message, wParam, lParam);
// this function initializes and prepares Direct3D for use
void initD3D(HWND hWnd)
d3d = Direct3DCreate9(D3D_SDK_VERSION); // create the Direct3D interface
D3DPRESENT_PARAMETERS d3dpp; // create a struct to hold various device information
ZeroMemory(&d3dpp, sizeof(d3dpp)); // clear out the struct for use
d3dpp.Windowed = TRUE; // program windowed, not fullscreen
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; // discard old frames
d3dpp.hDeviceWindow = hWnd; // set the window to be used by Direct3D
// create a device class using this information and the info from the d3dpp stuct
// this is the function used to render a single frame
// clear the window to a deep blue
d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 40, 100), 1.0f, 0);
d3ddev->BeginScene(); // begins the 3D scene
// do 3D rendering on the back buffer here
d3ddev->EndScene(); // ends the 3D scene
d3ddev->Present(NULL, NULL, NULL, NULL); // displays the created frame on the screen
// this is the function that cleans up Direct3D and COM
d3ddev->Release(); // close and release the 3D device
d3d->Release(); // close and release Direct3D
just realized that I'm using the 4.7.0 experimental version, I should probably test this under a stable version. I will post the results later tonight. thanks.
Well, I compiled your code with my mingw-w64 toolchain using cmd 'x86_64-w64-mingw32-gcc -o t.exe t_dx.C -ld3d9 -mwindows -O2'. I get by compiling this code the following warning:
t_dx.C: In function 'int WinMain(HINSTANCE, HINSTANCE, LPSTR, int)':
t_dx.C:50:30: warning: passing NULL to non-pointer argument 1 of 'HWND__* Create
WindowExA(DWORD, LPCSTR, LPCSTR, DWORD, int, int, int, int, HWND, HMENU, HINSTANCE, LPVOID)' [-Wconversion-null]
And the generated application works without any issues. So question here is what gcc version and what mingw-w64 version you are using?
I can compile and see the expected result when I compile this with
g++ main.cpp -ld3d9 -mwindows -o test.exe
with both my i686 and x86_64 GCC 4.7.0 compiler. I tested this on Windows 7 x64. I do get a hang when I omit the "-mwindows". Did you forget to add this?
oh i did forget to add -mwindows :( thanks a lot guys for the help!
No, I didn't missed the -mwindows option. The issue is that hInstance and nCmdShow values are passed to WinMain wrong in our startup for console-mode.
By replacing hInstance in WinMain by '(HINSTANCE) &__ImageBase'. (don't miss to prototype __ImageBase as 'extern char __ImageBase;') and replace use of nCmdShow variable by SW_SHOWDEFAULT, console mode works, too.
Issue fixed on trunk rev 5047-5048
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