3. Direkter Zugriff auf Oberflaeche // Access-Violation

Direkter Zugriff auf Oberflaeche // Access-Violation

  • ?

    Fehlermeldung:

    First-chance exception at 0x00c72548 in DirectXSurfaces.exe: 0xC0000005: Access violation writing location 0x000000a4.

    Relevanter Code aus der Main.cpp:

    case WM_PAINT:

			D3DCOLOR TextColor = D3DCOLOR_XRGB(0xFF,0,0);

			Direct3D.BeginScene();

			StarField.Draw(Direct3D.GetBackbuffer());

			Direct3D.DrawText("Test",100,100,D3DCOLOR_XRGB(0,0,0));

			Direct3D.EndScene();
		break;

    Relevanter Code aus der StarField.cpp:

    void CStarField::Draw(LPDIRECT3DSURFACE9 lpSurface)
{
	D3DLOCKED_RECT LockedRect;

	//lock access to the surface
	lpSurface->LockRect(&LockedRect,NULL,0);

	int Pitch = LockedRect.Pitch / 4;

	//if the lock was successful, lpSurface is a legit pointer to the surface
	D3DCOLOR* Pixels = (D3DCOLOR*)LockedRect.pBits;

	for(int i=0;i<m_NumberOfStars;i++)
	{
		m_Stars[i].Draw(Pixels,Pitch);
		m_Stars[i].Move();
	}

	//important release surface
	lpSurface->UnlockRect();
}

    Relevanter Code aus der Star.cpp:

    void CStar::Draw(D3DCOLOR* Pixels, int Pitch)
{
	//calculate star position
	int index = ((int)m_y * Pitch + (int)m_x);

	//starcolors

	//take length into consideration and chose color
	for(int i=0;i<m_length;i++)
	{
		Pixels[index + i * Pitch] = D3DCOLOR_XRGB(112+i*16,112+i*16,112+i*16);
	}
}

    Anmerkungen!!!
    Selbst wenn ich m_Stars[i].Draw(Pixels,Pitch); aus der StarField.cpp auskommentiere, bekomme ich keine Fehlermeldungen. Wenn ich dann irgendeine Methode, die versucht, auf einen der Pixel zuzugreifen, hinzufuege, spuckt die Console wieder Fehlermeldungen aus.

    0
  • ?

    'DirectXSurfaces.exe': Loaded 'D:\Users\ICH\Documents\Visual Studio 2010\Projects\DirectXSurfaces\Debug\DirectXSurfaces.exe', Symbols loaded.
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\d3d9.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\msvcrt.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\sechost.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\rpcrt4.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\sspicli.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\cryptbase.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\user32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\gdi32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\lpk.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\usp10.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\advapi32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\version.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\d3d8thk.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\dwmapi.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\D3DX9_43.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\winmm.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Symbols loaded.
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\imm32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\msctf.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\uxtheme.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\ole32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\clbcatq.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\oleaut32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\aticfx32.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\atiu9pag.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\atiumdag.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\atiumdva.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Unloaded 'C:\Windows\SysWOW64\atiumdva.dll'
    'DirectXSurfaces.exe': Unloaded 'C:\Windows\SysWOW64\atiumdag.dll'
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\atiumdag.dll', Cannot find or open the PDB file
    'DirectXSurfaces.exe': Loaded 'C:\Windows\SysWOW64\atiumdva.dll', Cannot find or open the PDB file
    First-chance exception at 0x00c72548 in DirectXSurfaces.exe: 0xC0000005: Access violation writing location 0x000000a4.
    Der Fehler ca. 200 mal 😉
    ...
    ...
    ...
    ...
    The thread 'Win32 Thread' (0xa1c) has exited with code 0 (0x0).
    The thread 'Win32 Thread' (0xb4c) has exited with code 0 (0x0).
    The thread 'Win32 Thread' (0xa80) has exited with code 0 (0x0).
    The thread 'Win32 Thread' (0x1140) has exited with code 0 (0x0).
    The thread 'Win32 Thread' (0x109c) has exited with code 0 (0x0).
    The thread 'Win32 Thread' (0x12ec) has exited with code 0 (0x0).
    The program '[4484] DirectXSurfaces.exe: Native' has exited with code 0 (0x0).

    0
  • V

    ich würde mal sagen, du schreibst da in bereich, der dir nicht gehört.

    0
  • ?

    Aber wieso? Ich locke ein Rechteck aus dem Backbuffer und moechte dann den einen oder anderen Pixel aendern und das Rechteck wieder freigeben...

    0
  • ?

    So, habe eben das erste mal den Debugger laufen lassen und dabei kam es yu folgendem Ergebnis:

    http://u89t.img-up.net/starfield1dw1g.jpg

    scheinbar laesst sich der backgroundbuffer nicht richtig oeffnen oder zumindest nicht das rechteck darin...
    Ausserdem wundert es mich, dass i einen negativen Wert hat?

    Dabei ist das der erste Methoden-Aufruf

    0

  • Returncodes von Funktionen sind dazu da dass man sie auswertet.
    Versuch das mal mit dem Returncode von LockRect().
    Returncode ausgeben, googeln, verstehen, Programm entsprechend ändern, funktioniert.

    0
  • ?

    Das HRESULT ist -2005530516 ich finde dazu aber nichts... 😞

    0
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