学WTL/MFC,学不会了去看WIN32。
学C/C++,学不会了去看汇编。
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. ", image->GetWidth()); printf("The height of the image is %u. ", 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.csdn.net/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)); }