ビットマップの表示

メモリデバイスコンテキスト

//リソーススクリプト
KITTY BITMAP "test.bmp"

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hwnd , UINT msg , WPARAM wp , LPARAM lp) {
	HDC hdc , hBuffer;
	PAINTSTRUCT ps;
	static HBITMAP hBitmap;

	switch (msg) {
	case WM_DESTROY:
		DeleteObject(hBitmap);
		PostQuitMessage(0);
		return 0;
	case WM_CREATE:
		hBitmap = LoadBitmap(
			((LPCREATESTRUCT)lp)->hInstance ,
			TEXT("KITTY")
		);
		return 0;
	case WM_PAINT:
		hdc = BeginPaint(hwnd , &ps);
		hBuffer = CreateCompatibleDC(hdc);
		SelectObject(hBuffer , hBitmap);

		BitBlt(hdc , 0 , 0 , 400 , 120 , hBuffer , 70 , 80 , SRCCOPY);

		DeleteDC(hBuffer);
		EndPaint(hwnd , &ps);
		return 0;
	}
	return DefWindowProc(hwnd , msg , wp , lp);
}

int WINAPI WinMain(HINSTANCE hInstance , HINSTANCE hPrevInstance ,
			PSTR lpCmdLine , int nCmdShow ) {
	HWND hwnd;
	MSG msg;
	WNDCLASS winc;

	winc.style		= CS_HREDRAW | CS_VREDRAW;
	winc.lpfnWndProc	= WndProc;
	winc.cbClsExtra	= winc.cbWndExtra	= 0;
	winc.hInstance		= hInstance;
	winc.hIcon		= LoadIcon(NULL , IDI_APPLICATION);
	winc.hCursor		= LoadCursor(NULL , IDC_ARROW);
	winc.hbrBackground	= (HBRUSH)GetStockObject(WHITE_BRUSH);
	winc.lpszMenuName	= NULL;
	winc.lpszClassName	= TEXT("KITTY");

	if (!RegisterClass(&winc)) return -1;

	hwnd = CreateWindow(
			TEXT("KITTY") , TEXT("Kitty on your lap") ,
			WS_OVERLAPPEDWINDOW | WS_VISIBLE ,
			CW_USEDEFAULT , CW_USEDEFAULT ,
			CW_USEDEFAULT , CW_USEDEFAULT ,
			NULL , NULL ,
			hInstance , NULL
	);

	if (hwnd == NULL) return -1;

	while(GetMessage(&msg , NULL , 0 , 0)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}

CreateCompatibleDC()

LoadBitmap()