003
26.03.2005, 20:00 Uhr
~radix
Gast
|
Danke ich werds mir mal anschauen....
Hab mal n Prob mit der WinGDI:
| C++: |
#define STRICT
#define CName "My Application"
#include <windows.h>
const int WindowXSize = 640;
const int WindowYSize = 480;
HWND hwnd;
inline int MyLoop();
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASS wc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hbrBackground = (HBRUSH) GetStockObject(BLACK_BRUSH);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
wc.hInstance = hInstance;
wc.lpfnWndProc = WndProc;
wc.lpszClassName = CName;
wc.lpszMenuName = NULL;
wc.style = CS_VREDRAW|CS_HREDRAW;
RegisterClass(&wc);
hwnd = CreateWindow(CName, CName, WS_POPUP|WS_SYSMENU, 100, 100, WindowXSize, WindowYSize, NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
MSG msg;
while ( msg.message != WM_QUIT )
{
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
MyLoop();
}
return msg.wParam;
}
//////////////////////////
//////////////////////////
HDC hdc;
HDC hdc2;
HBITMAP bmp;
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
{
switch(msg)
{
case WM_CREATE:
hdc = GetDC(hwnd);
hdc2 = CreateCompatibleDC(hdc);
bmp = CreateCompatibleBitmap(hdc, WindowXSize, WindowYSize);
SelectObject(hdc2, bmp);
return 0;
case WM_PAINT:
BitBlt(hdc, 0, 0, WindowXSize, WindowYSize, hdc2, 0, 0, SRCCOPY);
return 0;
case WM_DESTROY:
DeleteObject(bmp);
ReleaseDC(hwnd, hdc2);
ReleaseDC(hwnd, hdc);
PostQuitMessage(0);
return 0;
case WM_KEYDOWN:
if (wp == VK_ESCAPE)
SendMessage(hwnd, WM_DESTROY, 0, 0);
return 0;
}
return DefWindowProc(hwnd, msg, wp, lp);
}
inline int MyLoop()
{
TextOut(hdc2, 10,10,"H", 1);
InvalidateRect(hwnd, NULL, FALSE);
return 0;
}
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Soviel zum Code:
Soll n Double Buffering test darstellen. Nur es funzt nich, irgenwie wird kein "H" angezeit...
Wenn ich aber das TextOut(hdc2,...) in die WM_PAINT rein packe, dann gehts.
Ich wollt aber unbedingt in der MyLoop() auf den BackBuffer zeichnen.
Hilfe und sonstige Verbesserungsvorschläge zum Code herzlich willkommen 
MfG radix |
