调用DrawImage时解决“内存不足"异常 [英] Resolve 'Out of memory' exception when calling DrawImage

问题描述

大约有百分之一的用户在使用我们的应用程序时遇到突然崩溃.日志显示以下异常，到目前为止，我唯一看到的共同点是它们都具有XP SP3.

About one percent of our users experience sudden crash while using our application. The logs show below exception, the only thing in common that I've seen so far is that, they all have XP SP3.

预先感谢

Out of memory.

   at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
   at System.Drawing.Graphics.DrawImage(Image image, Rectangle destRect, Int32 srcX, Int32 srcY, Int32 srcWidth, Int32 srcHeight, GraphicsUnit srcUnit, ImageAttributes imageAttrs, DrawImageAbort callback, IntPtr callbackData)
   at System.Drawing.Graphics.DrawImage(Image image, Rectangle destRect, Int32 srcX, Int32 srcY, Int32 srcWidth, Int32 srcHeight, GraphicsUnit srcUnit, ImageAttributes imageAttr, DrawImageAbort callback)
   at System.Drawing.Graphics.DrawImage(Image image, Rectangle destRect, Int32 srcX, Int32 srcY, Int32 srcWidth, Int32 srcHeight, GraphicsUnit srcUnit, ImageAttributes imageAttr)
   at System.Windows.Forms.ControlPaint.DrawBackgroundImage(Graphics g, Image backgroundImage, Color backColor, ImageLayout backgroundImageLayout, Rectangle bounds, Rectangle clipRect, Point scrollOffset, RightToLeft rightToLeft)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle)
   at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent)
   at System.Windows.Forms.ScrollableControl.OnPaintBackground(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle, Region transparentRegion)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle)
   at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent)
   at System.Windows.Forms.ScrollableControl.OnPaintBackground(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle, Region transparentRegion)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset)
   at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle)
   at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Operation System Information
----------------------------
Name = Windows XP
Edition = Home
Service Pack = Service Pack 3
Version = 5.1.2600.196608
Bits = 32

推荐答案

我确定您现在已经解决了这个问题，但是如果您还没有遇到同样的问题.这是GDI +中的错误，可以作为解决方法.不幸的是，我不知道为什么为什么，但是由于这些问题，我倾向于更关心它是否已解决，而不是为什么要解决. ;)

I'm sure you've figured this out by now, but in case you haven't we hit the same issue. It's a bug in GDI+ and this works as a workaround. Unfortunately I don't know why but with these sorts of issues I tend to care more that it's fixed and less why it's fixed. ;)

image = image.GetThumbnailImage(image.Width, image.Height, null, IntPtr.Zero);

显然，该调用会调整PixelFormat并将图像放置为imagelist的DrawImage用法可以处理的格式.

Apparently that call adjusts the PixelFormat and puts the image in a format that the imagelist's usage of DrawImage can handle.

发件人: https://siderite.dev/blog/outofmemoryexception-in.html

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