c++ gdi图像数组

发布于 2024-09-16 14:27:16 字数 181 浏览 2 评论 0原文

我试图制作一组图像

Image something(L"something.png");

而不是

Image something[2];
something[0]=(L"something.png");

任何想法

原文

im trying to make an array of images

Image something(L"something.png");

instead of that

Image something[2];
something[0]=(L"something.png");

any idea

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偏爱你一生 2024-09-23 14:27:16

通过指针使用 Gdiplus 图像和位图对象要容易得多。

考虑使用指针数组。如果您不想在完成后显式记住释放数组，则可以使用智能指针。在下面的代码示例中，我使用 CAutoPtr。

#include <Windows.h>
#include <gdiplus.h>
#include <atlbase.h>    

    void HandleImages(HDC hdc)
    {    
      typedef CAutoPtr<Gdiplus::Image> GdiplusImagePtr; // could be declared using CAutoPtr<Gdiplus::Bitmap>
      GdiplusImagePtr something[2];
      Gdiplus::Graphics g(hdc);

      something[0].Attach(new Gdiplus::Bitmap(L"something.png"));
      something[1].Attach(new Gdiplus::Bitmap(L"otherthing.png"));


      for (int x = 0; x < ARRAYSIZE(something); x++)
      {
          g.DrawImage(something[x], 50*x, 0);
      }

      // CAutoPtr will call destructor for each item in something array
   }

It's a lot easier to use Gdiplus image and bitmap objects by pointer.

Consider using an array of pointers. If you don't want to have to explicitly remember to free the array when you are done, you can use a smart pointer. In the code sample below I use CAutoPtr.

#include <Windows.h>
#include <gdiplus.h>
#include <atlbase.h>    

    void HandleImages(HDC hdc)
    {    
      typedef CAutoPtr<Gdiplus::Image> GdiplusImagePtr; // could be declared using CAutoPtr<Gdiplus::Bitmap>
      GdiplusImagePtr something[2];
      Gdiplus::Graphics g(hdc);

      something[0].Attach(new Gdiplus::Bitmap(L"something.png"));
      something[1].Attach(new Gdiplus::Bitmap(L"otherthing.png"));


      for (int x = 0; x < ARRAYSIZE(something); x++)
      {
          g.DrawImage(something[x], 50*x, 0);
      }

      // CAutoPtr will call destructor for each item in something array
   }

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