Drawing pixels on a window?
hi!
i want to make a software-renderer, like the one i did before in an other programming language. this time, i'll do it in C++. the problem is: how do i draw pixels on the window (FAST) ?
something like a pointer to the screen buffer would be nice :)
thanks for helping.
Code:
#include <windows.h>
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR szCmdLine, int iCmdShow)
{
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_APPLICATION);
wc.hInstance = hInstance;
wc.lpfnWndProc = WndProc;
wc.lpszClassName = TEXT("MainWindow");
wc.lpszMenuName = 0;
wc.style = CS_HREDRAW | CS_VREDRAW;
RegisterClass(&wc);
HWND hwnd = CreateWindow(
TEXT("MainWindow"),
TEXT("Test"),
WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX,
100, 100,
640, 480,
NULL, NULL,
hInstance, NULL
);
ShowWindow(hwnd, iCmdShow);
MSG msg;
while (GetMessage(&msg, NULL, 0, 0 ))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
switch (message)
{
case WM_PAINT:
HDC hdc;
PAINTSTRUCT ps;
hdc = BeginPaint(hwnd, &ps);
for (int y = 0; y < 480; y++)
{
for (int x = 0; x < 640; x++)
{
SetPixel(hdc, x, y, 0xffffff);
}
}
EndPaint(hwnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
}
return DefWindowProc(hwnd, message, wparam, lparam);
}
