8Windows_paint2_bimap 位图

#include <windows.h>
#include <iostream>
#include "resource1.h"

//宏定义输出函数
#define PrintLog(x) WriteConsole(g_hStdout, x, strlen(x), NULL, NULL);

HINSTANCE g_hInst;
HANDLE g_hStdout = NULL;
CHAR szText[256] = { 0 };

//DrawBmp
void DrawBmp(HDC hDC)
{
	//加载位图
	HBITMAP hBMap = LoadBitmap(g_hInst, MAKEINTRESOURCE(IDB_BALL01));

	//获取位图相关信息。。。新增加，对应笔记里的第8条
	BITMAP bmpInfo = { 0 };
	GetObject(hBMap, sizeof(bmpInfo), &bmpInfo); //得到一个BITMAP结构体的数据，就可以直接使用得到bmpInfo.bmWidth


	//创建放置位图的DC
	HDC hBmpDC = CreateCompatibleDC(hDC);

	//将位图放入创建的hBmpDC中
	HBITMAP hOldBmp = (HBITMAP)SelectObject(hBmpDC, hBMap);

	//绘制位图 BitBlt 
	BitBlt(hDC, 100, 100, 48, 48, hBmpDC, 0, 0, SRCCOPY);

	//拉伸绘制位图 StretchBlt
	StretchBlt(hDC, 200, 100, 200, 200, hBmpDC, 0, 0, bmpInfo.bmWidth, bmpInfo.bmHeight, SRCCOPY); //拉伸方式绘制

	//取出位图
	SelectObject(hBmpDC, hOldBmp);

	//删除DC
	DeleteDC(hBmpDC);

	//删除位图
	DeleteObject(hBMap);
}

//OnPaint
void OnPaint(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
	PAINTSTRUCT ps = { 0 };
	HDC hDC = BeginPaint(hWnd, &ps);

	DrawBmp(hDC);


	EndPaint(hWnd, &ps);
}

//OnCommand
void OnCommand(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{

	int hMenuID = LOWORD(wParam);
	switch (hMenuID)
	{
	case ID_EXIT:
		PostQuitMessage(0);
		break;
	}
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam)
{
	switch (nMsg)
	{
	case WM_PAINT:
		OnPaint(hWnd, nMsg, wParam, lParam);
		break;

	case WM_COMMAND:
		OnCommand(hWnd, nMsg, wParam, lParam);
		break;

	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	}
	return DefWindowProc(hWnd, nMsg, wParam, lParam);
}

BOOL RegisterWnd(LPSTR pszClassName)
{
	WNDCLASSEX wce = { 0 };
	wce.cbSize = sizeof(wce);
	wce.cbClsExtra = 0;
	wce.cbWndExtra = 0;
	wce.hbrBackground = HBRUSH(COLOR_BTNFACE + 1);
	wce.hCursor = NULL;
	wce.hIcon = NULL;
	wce.hIconSm = NULL;
	wce.hInstance = g_hInst;
	wce.lpfnWndProc = WndProc;
	wce.lpszClassName = pszClassName;
	wce.lpszMenuName = NULL;
	wce.style = CS_VREDRAW | CS_HREDRAW;

	ATOM aTom = RegisterClassEx(&wce);
	if (aTom == 0)
	{
		return FALSE;
	}
	else
	{
		return TRUE;
	}
}

HWND CreateWnd(LPSTR pszClassName)
{
	//加入菜单
	HMENU hMainMenu = LoadMenu(g_hInst, MAKEINTRESOURCE(IDR_MAIN));

	HWND hWnd = CreateWindowEx(0, pszClassName, "风火中原", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
		NULL, hMainMenu, g_hInst, NULL);

	return hWnd;
}

void showWnd(HWND hWnd)
{
	ShowWindow(hWnd, SW_SHOW);
	UpdateWindow(hWnd);
}
void msg()
{
	MSG msg = { 0 };
	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
}

//控制台
void ConsoleWnd()
{
	AllocConsole();
	g_hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
	CHAR szText[] = "Debug start:\n";
	PrintLog(szText);
}

int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
{
	g_hInst = hInstance;
	ConsoleWnd();
	RegisterWnd("OOOO");
	HWND hWnd = CreateWnd("OOOO");
	showWnd(hWnd);
	msg();

	return 0;
}

来自为知笔记(Wiz)