【发布时间】:2010-09-09 17:03:31
【问题描述】:
当我在服务器上旋转图像时。它会导致内存不足异常。
/// <summary>
/// Rotates the specified img.
/// </summary>
/// <param name="img">The img.</param>
/// <param name="rotationAngle">The rotation angle.</param>
/// <returns></returns>
public static Bitmap Rotate(Image img, float rotationAngle)
{
//create an empty Bitmap image
Bitmap bmp = new Bitmap(img.Width, img.Height);
//turn the Bitmap into a Graphics object
using (Graphics gfx = Graphics.FromImage(bmp))
{
//now we set the rotation point to the center of our image
gfx.TranslateTransform((float) bmp.Width/2, (float) bmp.Height/2);
//now rotate the image
gfx.RotateTransform(rotationAngle);
gfx.TranslateTransform(-(float) bmp.Width/2, -(float) bmp.Height/2);
//set the InterpolationMode to HighQualityBicubic so to ensure a high
//quality image once it is transformed to the specified size
gfx.SmoothingMode = SmoothingMode.HighQuality;
gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;
gfx.CompositingQuality = CompositingQuality.HighQuality;
gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;
//now draw our new image onto the graphics object
gfx.DrawImage(img, new Point(0, 0));
}
//return the image
return bmp;
}
此行发生异常:gfx.DrawImage(img, new Point(0, 0));
我在互联网上搜索过,发现很多人有类似的问题,但没有解决方案。
有解决办法吗?或者除了 GDI+ 之外还有其他库可以用来旋转我的图像吗?也许 WPF 中有什么东西?
堆栈跟踪:
[OutOfMemoryException: Out of memory.]
System.Drawing.Graphics.CheckErrorStatus(Int32 status) +1588745
System.Drawing.Graphics.DrawImage(Image image, Int32 x, Int32 y) +227
System.Drawing.Graphics.DrawImage(Image image, Point point) +26
Chucksoft.Core.Drawing.ImageResizer.Rotate(Image img, Single rotationAngle) in C:\Projects\ChucksoftCore\Branches\2.5.0\Source\Chucksoft.Core\Drawing\ImageResizer.cs:245
Chucksoft.Core.Drawing.ImageResizer.Rotate(Byte[] b, Single angle, ImageFormat format) in C:\Projects\ChucksoftCore\Branches\2.5.0\Source\Chucksoft.Core\Drawing\ImageResizer.cs:22
TheMemorableMoments.Domain.Services.ImageService.Rotate(IEnumerable`1 media, User user, Single angle) in C:\Projects\TheMemorableMoments\Branches\2.1.0\Source\TheMemorableMoments\Domain\Services\ImageService.cs:34
TheMemorableMoments.Domain.Services.ImageService.RotateLeft(List`1 media, User user) in C:\Projects\TheMemorableMoments\Branches\2.1.0\Source\TheMemorableMoments\Domain\Services\ImageService.cs:69
TheMemorableMoments.UI.Controllers.User.PhotosController.Rotate(IMediaFiles media, Action`2 resizeMethod) in C:\Projects\TheMemorableMoments\Branches\2.1.0\Source\TheMemorableMoments.UI\Controllers\User\PhotosController.cs:408
TheMemorableMoments.UI.Controllers.User.PhotosController.RotateLeft(Media media) in C:\Projects\TheMemorableMoments\Branches\2.1.0\Source\TheMemorableMoments.UI\Controllers\User\PhotosController.cs:396
lambda_method(Closure , ControllerBase , Object[] ) +127
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +258
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +39
System.Web.Mvc.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a() +125
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +640
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +312
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +709
System.Web.Mvc.Controller.ExecuteCore() +162
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__4() +58
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +20
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +453
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
【问题讨论】:
-
你的图片有多大?
-
2 到 3 兆。它所在的服务器有 4 个演出。
-
这很奇怪。没有什么让我觉得有内存泄漏。就调试而言,您是否尝试过仅在位图上绘制而不进行任何转换?尝试找出哪个属性会导致异常缩小一点。泄漏是与此函数隔离的,还是只是在此特定调用中内存不足?
-
你的代码在使用完返回的
Bitmap后处理了吗? -
所有位图都被释放。仍然出现错误...
标签: c# out-of-memory