GDI+ Hello World

最新推荐文章于 2025-05-27 15:08:36 发布

weixin_30723433

最新推荐文章于 2025-05-27 15:08:36 发布

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/lgh1992314/p/6616366.html

本文介绍了如何使用GDI+进行基本的绘图操作，包括绘制文字和加载显示图片，并提供了完整的示例代码。此外，还对比了GDI+与GDI的区别。

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学WTL/MFC，学不会了去看WIN32。

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使用VS，不明白了去用cl.exe/link.exe

控制台下输出图片的分辨率：

#include <windows.h>
#include <gdiplus.h>
#include <stdio.h>
using namespace Gdiplus;

INT main()
{
   GdiplusStartupInput gdiplusStartupInput;
   ULONG_PTR gdiplusToken;
   GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

   Image *image = new Image(L"ing.png");
   printf("The width of the image is %u.\n", image->GetWidth());
   printf("The height of the image is %u.\n", image->GetHeight()); 

   delete image;
   GdiplusShutdown(gdiplusToken);
   return 0;
}

GDI+和GDI区别以及一些新特征

http://www.cnblogs.com/kekec/archive/2010/09/28/1837427.html

详细使用说明见MSDN:

https://msdn.microsoft.com/en-us/library/vs/alm/ms533802(v=vs.85).aspx

/**
* @file tutorial.cpp
* @CopyRight (C) http://blog.youkuaiyun.com/x_iya
* @brief Gdiplus学习记录
* @author lgh1992314@qq.com
* @date 2016-09-26
*/

#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")

VOID OnPaint(HDC hdc, RECT rect)
{
	Graphics    graphics(hdc);
	SolidBrush  brush(Color(255, 0, 0, 255));
	FontFamily  fontFamily(L"Times New Roman");
	Font        font(&fontFamily, 24, FontStyleRegular, UnitPixel);
	PointF      pointF(10.0f, 20.0f);

	graphics.DrawString(L"Hello World!", -1, &font, pointF, &brush);
}


LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
	PSTR szCmdLine, int iCmdShow)
{
	static TCHAR		szAppName[] = TEXT("GdiPlus");
	HWND				hwnd;
	MSG					msg;
	WNDCLASS			wndclass;
	GdiplusStartupInput gdiplusStartupInput;
	ULONG_PTR           gdiplusToken;

	// Initialize GDI+.
	GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

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

	if (!RegisterClass(&wndclass))
	{
		MessageBox(NULL, TEXT("This program requires Windows NT!"),
			szAppName, MB_ICONERROR);
		return 0;
	}

	hwnd = CreateWindow(szAppName,// window class name
		TEXT("Gdiplus"),			// window caption
		WS_OVERLAPPEDWINDOW,        // window style
		CW_USEDEFAULT,              // initial x position
		CW_USEDEFAULT,              // initial y position
		CW_USEDEFAULT,              // initial x size
		CW_USEDEFAULT,              // initial y size
		NULL,                       // parent window handle
		NULL,                       // window menu handle
		hInstance,                // program instance handle
		NULL);                     // creation parameters

	ShowWindow(hwnd, iCmdShow);
	UpdateWindow(hwnd);

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

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	HDC         hdc;
	PAINTSTRUCT ps;
	RECT        rect;

	switch (message)
	{
	case WM_CREATE:
		return 0;

	case WM_PAINT:
		hdc = BeginPaint(hwnd, &ps);

		GetClientRect(hwnd, &rect);

		OnPaint(hdc, rect);

		DrawText(hdc, TEXT("Hello World"), -1, &rect,
			DT_SINGLELINE | DT_CENTER | DT_VCENTER);

		EndPaint(hwnd, &ps);
		return 0;

	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}
	return DefWindowProc(hwnd, message, wParam, lParam);
}

加载图片：

VOID OnPaint(HDC hdc, RECT rect)
{
	Graphics    graphics(hdc);
	Image image(TEXT("ing.png"));
	graphics.DrawImage(&image, rect.left, rect.top, (rect.right - rect.left), (rect.bottom - rect.top));
}