retrieveing緩衝區我遇到的問題是與以下「訪問衝突讀取位置」的煩惱從DirectX的
ID3D10Texture2D *pBackBuffer;
hr = mpSwapChain->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID*) &pBackBuffer);
下面是我的代碼...
#include "DX3dApp.h"
bool DX3dApp::Init(HINSTANCE hInstance, int width, int height)
{
mhInst = hInstance;
mWidth = width;
mHeight = height;
if(!WindowsInit())
{
return false;
}
if(!InitDirect3D())
{
return false;
}
return true;
}
int DX3dApp::Run()
{
MSG msg = {0};
while (WM_QUIT != msg.message)
{
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE) == TRUE)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
Render();
}
return (int) msg.wParam;
}
bool DX3dApp::WindowsInit()
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = mhInst;
wcex.hIcon = 0;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = TEXT("DirectXExample");
wcex.hIconSm = 0;
RegisterClassEx(&wcex);
// Resize the window
RECT rect = { 0, 0, mWidth, mHeight };
AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, FALSE);
// create the window from the class above
mMainhWnd = CreateWindow(TEXT("DirectXExample"),
TEXT("DirectXExample"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
rect.right - rect.left,
rect.bottom - rect.top,
NULL,
NULL,
mhInst,
NULL);
if (!mMainhWnd)
{
return false;
}
ShowWindow(mMainhWnd, SW_SHOW);
UpdateWindow(mMainhWnd);
return true;
}
bool DX3dApp::InitDirect3D()
{
DXGI_SWAP_CHAIN_DESC scd;
ZeroMemory(&scd, sizeof(scd));
scd.BufferCount = 1;
scd.BufferDesc.Width = mWidth;
scd.BufferDesc.Height = mHeight;
scd.BufferDesc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
scd.BufferDesc.RefreshRate.Numerator = 60;
scd.BufferDesc.RefreshRate.Denominator = 1;
scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
scd.OutputWindow = mMainhWnd;
scd.SampleDesc.Count = 1;
scd.SampleDesc.Quality = 0;
scd.Windowed = TRUE;
HRESULT hr = D3D10CreateDeviceAndSwapChain(NULL,D3D10_DRIVER_TYPE_REFERENCE,
NULL,
0,
D3D10_SDK_VERSION,
&scd,
&mpSwapChain,
&mpD3DDevice);
if(!hr != S_OK)
{
return FALSE;
}
ID3D10Texture2D *pBackBuffer;
hr = mpSwapChain->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID*) &pBackBuffer);
return TRUE;
}
void DX3dApp::Render()
{
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
// Allow the user to press the escape key to end the application
case WM_KEYDOWN:
switch(wParam)
{
// Check if the user hit the escape key
case VK_ESCAPE:
PostQuitMessage(0);
break;
}
break;
// The user hit the close button, close the application
case WM_DESTROY:
PostQuitMessage(0);
break;
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
,我得到以下錯誤
chp1.exe': Unloaded 'C:\Windows\SysWOW64\oleaut32.dll'
First-chance exception at 0x757ce124 in chp1.exe: Microsoft C++ exception: _com_error at memory location 0x0018eeb0..
First-chance exception at 0x757ce124 in chp1.exe: Microsoft C++ exception: _com_error at memory location 0x0018edd0..
First-chance exception at 0x757ce124 in chp1.exe: Microsoft C++ exception: _com_error at memory location 0x0018ef1c..
The thread 'Win32 Thread' (0xfc4) has exited with code 0 (0x0).
'chp1.exe': Unloaded 'C:\Windows\SysWOW64\D3D10Ref.DLL'
First-chance exception at 0x00b71894 in chp1.exe: 0xC0000005: Access violation reading location 0x00000000.
Unhandled exception at 0x00b71894 in chp1.exe: 0xC0000005: Access violation reading location 0x00000000.
看來,錯誤發生在最後一個參數。 & pBackBuffer。我添加了這一行代碼併發生錯誤。
[編輯]
如下所述,這個問題是我在訪問一個空指針來緩衝。但我不知道我在做什麼錯了。
這是有道理的。但在同一時間我檢查了人力資源,看看它是否恢復正常。我上面更新了我的代碼。 – numerical25 2010-04-27 13:55:39
啊,很好,現在可以解決這個問題。現在我要找出爲什麼我的mpSwapChain沒有成功初始化 – numerical25 2010-04-27 14:11:38
@ numerical25:嚴重的是,永遠不要嘗試使用'!hr'。無論你認爲它做什麼,它都不會那樣做。 – Alan 2010-04-28 23:28:03