我试图通过制作一个窗口并将OpenGL上下文附加到它来自学win32 API。为了获取适当的像素格式，必须调用 ChoosePixelFormat，它应该返回系统支持并最能满足我需求的像素格式。当我检查错误时，一切都很顺利，直到调用该函数停止执行并记录错误 1150-ERR_OLD_WIN_VERSION 这应该意味着我的 Windows 版本不支持此函数。显然情况并非如此，msdn 确认此功能可在自 windows 2000 以来的所有 windows 版本上运行。现在我在桌面上运行 windows 7 x64，并确保我的视频驱动程序和操作系统已完全更新。很多人似乎在使用像素格式功能时遇到了问题，但我没有发现任何问题，所以我决定在这里发帖寻求帮助。这是我的完整代码；除了我自己的机器，我还没有在任何机器上测试过它。
WinMain.cpp（与之链接的唯一非默认 msvc 库是 opengl32.lib）
#include"Display.h"
#include<iostream>
#include<fstream>
MSG message;
DWORD error;
int status;
LRESULT CALLBACK WndProc(HWND hWindow, UINT message, WPARAM wParam, LPARAM lParam)
{ switch(message)
{case WM_CREATE:
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
case WM_KEYDOWN:
switch(wParam)
{case VK_ESCAPE:
PostQuitMessage(0);
return 0;}}
return DefWindowProc(hWindow, message, wParam, lParam);}
int MainLoop(Display d)
{
while((status = PeekMessage(&message, d.hWindow, 0, 0, PM_REMOVE)) != 0)
{
if (status == -1)
{
return -1;
}
DispatchMessage(&message);
}
return 0;
}
int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
std::ofstream file("log.txt", std::ios::trunc);
Display window("TEST", hInstance, WndProc, 50, 50, 50, 50, NULL, NULL);
if(window.status == -1)
{ error = GetLastError();
file << error;
return 1;}
ShowWindow(window.hWindow, SW_SHOWNORMAL);
EnableWindow(window.hWindow, true);
MainLoop(window);
return 0;
}
Display.h（类构造函数出现问题）
#include <Windows.h>
class Display
{public:
Display(const char*, HINSTANCE, WNDPROC, int, int, int, int, DWORD, DWORD);
~Display();
HWND hWindow;
int status;
private:
WNDCLASSEX data;
HDC hDeviceContext;
HGLRC hGLContext;
PIXELFORMATDESCRIPTOR PFD;
int x, y, width, height;};
Display::Display(const char* title, HINSTANCE InstanceHandle, WNDPROC WindowProcedure, int ScreenPositionX, int ScreenPositionY, int WindowWidth, int WindowHeight, DWORD StyleFlags, DWORD ExtendedStyleFlags)
{ data.cbSize = sizeof(WNDCLASSEX);
data.style = CS_OWNDC;
data.lpfnWndProc = WindowProcedure;
data.cbClsExtra = 0;
data.cbWndExtra = 0;
data.hInstance = InstanceHandle;
data.hIcon = NULL;
data.hCursor = NULL;
data.hbrBackground = NULL;
data.lpszMenuName = NULL;
data.lpszClassName = "WIN1";
data.hIconSm = NULL;
RegisterClassEx(&data);
hWindow = CreateWindowEx(ExtendedStyleFlags, data.lpszClassName, title, StyleFlags | WS_CLIPSIBLINGS | WS_CLIPCHILDREN, x = ScreenPositionX, y = ScreenPositionY, width = WindowWidth, height = WindowHeight, NULL, NULL, InstanceHandle, NULL);
PFD.nSize = sizeof(PIXELFORMATDESCRIPTOR);
PFD.nVersion = 1;
PFD.iPixelType = PFD_TYPE_RGBA;
PFD.iLayerType = PFD_MAIN_PLANE;
PFD.dwVisibleMask = 0;
PFD.dwLayerMask = 0;
PFD.dwDamageMask = 0;
PFD.dwFlags = PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER | PFD_SUPPORT_OPENGL;
PFD.cAuxBuffers = 0;
PFD.bReserved = 0;
PFD.cColorBits = 24;
PFD.cAccumBits = 0;
PFD.cDepthBits = 32;
PFD.cStencilBits = 0;
PFD.cAlphaBits = 0;
PFD.cAccumAlphaBits = 0;
PFD.cAlphaShift = 0;
PFD.cBlueBits = 0;
PFD.cAccumBlueBits = 0;
PFD.cBlueShift = 0;
PFD.cGreenBits = 0;
PFD.cAccumGreenBits = 0;
PFD.cGreenShift = 0;
PFD.cRedBits = 0;
PFD.cAccumRedBits = 0;
PFD.cRedShift = 0;
hDeviceContext = GetDC(hWindow);
int pf = ChoosePixelFormat(hDeviceContext, &PFD); //throws error 1150, next three throw error 2000 because of this failing
SetPixelFormat(hDeviceContext, pf, &PFD);
hGLContext = wglCreateContext(hDeviceContext);
wglMakeCurrent(hDeviceContext, hGLContext);
if(GetLastError() != ERROR_SUCCESS)
{status = -1;}
else
{status = 0;}
return;}
Display::~Display()
{ wglMakeCurrent(NULL, NULL);
wglDeleteContext(hGLContext);
DestroyWindow(hWindow);
UnregisterClass(data.lpszClassName, data.hInstance);}