ddrawwrapper.cpp

来自「VC++高级编程技巧与示例」· C++ 代码 · 共 148 行

// DDrawWrapper.cpp : Defines the entry point for the application.
//
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
//-----------------------------------------------------------------------------
// Include files
//-----------------------------------------------------------------------------
#include <windows.h>
#include <ddraw.h>
#include <stdio.h>
#include <stdarg.h>
#include "stdafx.h"
#include "HDirectDraw.h"

#define TIMER_ID            1
#define TIMER_RATE          500

#define CX 320
#define CY 240
#define LEN 100
BOOL g_bActive=FALSE;

LPCTSTR szMsg     ="Press the fucked F12!";

LPCTSTR szFrontMsg="Front!";
LPCTSTR szBackMsg ="Back!";

CDirectDraw DDraw;

UINT x[4]={
			CX-LEN,CX,CX+LEN,CX
			};
UINT y[4]={
			CY,CY-LEN,CY,CY+LEN
			};

static void DeleteAllObjects()
{
	DDraw.CloseDDraw();
}

void UpdateFrame(HWND hWnd)
{
	static BYTE phase = 0;
    static BYTE count = 0;
    static BYTE bc    = 0;
	DDraw.ClearBackBuffer();
	DDraw.GetDC(DDraw.lpDDSBack);
	DDraw.SetTextColor(RGB(255,255,0));
	DDraw.SetBkColor(RGB(0,0,255));
	if(phase==0)
	{
		DDraw.TextOut(400,20,"Prime");
		phase=1;
	}
	else
	{
		DDraw.TextOut(400,20,"Back");
		phase=0;
	}
	DDraw.TextOut(320,240,"Press the F12 key!");
	//画线：
	HPEN op;
	HPEN hp=::CreatePen(PS_SOLID,1,RGB(255,255,0));
	op=(HPEN)::SelectObject(DDraw.hDC,hp);
	DDraw.MoveTo(CX,CY);
	::LineTo(DDraw.hDC,x[count],y[count]);
	::SelectObject(DDraw.hDC,op);
	::DeleteObject(hp);
	count++;
	if(count==4) count=0;
	DDraw.ReleaseDC();
}

long FAR PASCAL
WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        case WM_ACTIVATEAPP:
            // Pause if minimized or not the top window
            g_bActive = (wParam == WA_ACTIVE) || (wParam == WA_CLICKACTIVE);
            return 0L;

        case WM_DESTROY:
            // Clean up and close the app
			DeleteAllObjects();
            PostQuitMessage(0);
            return 0L;

        case WM_KEYDOWN:
            // Handle any non-accelerated key commands
            switch (wParam)
            {
                case VK_ESCAPE:
                case VK_F12:
                    PostMessage(hWnd, WM_CLOSE, 0, 0);
                    return 0L;
            }
            break;

        case WM_SETCURSOR:
            // Turn off the cursor since this is a full-screen app
            SetCursor(NULL);
            return TRUE;

        case WM_TIMER:
            // Update and flip surfaces
            if (g_bActive && TIMER_ID == wParam)
            {
                UpdateFrame(hWnd);
				DDraw.Flip();
            }
            break;
    }
    return DefWindowProc(hWnd, message, wParam, lParam);
}

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
    MSG msg;

    if (DDraw.CreateDDrawWnd(hInstance, nCmdShow,WindowProc) != TRUE)
	{
        return FALSE;
	}
	if(DDraw.InitDDraw(640,480,32)!=TRUE)
	{
		return FALSE;
	}
	if(DDraw.SetTimer(1,1)!=TRUE)
	{
		return FALSE;
	}

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