BufferSizeHint

ImageOptionsBase.BufferSizeHint property

获取或设置缓冲区大小提示，该提示定义了所有内部缓冲区的最大允许大小。

public int BufferSizeHint { get; set; }

适当的价值

缓冲区大小提示，以兆字节为单位。非正值表示内部缓冲区没有内存限制

例子

以下示例显示了如何在创建新的 JPEG 图像时设置内存限制。内存限制是所有内部缓冲区的最大允许大小（以兆字节为单位）。

[C#]

string dir = "c:\\aspose.imaging\\issues\\net\\3404\\";

// 为目标创建的图像设置 50 兆字节的内存限制
Aspose.Imaging.ImageOptionsBase createOptions = new Aspose.Imaging.ImageOptions.JpegOptions
{
    CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive,
    BufferSizeHint = 50,
    Source = new Aspose.Imaging.Sources.FileCreateSource(dir + "createdFile.jpg", false),
};
    
using (var image = Aspose.Imaging.Image.Create(createOptions, 1000, 1000))
{
    image.Save(); // 保存到同一个位置
}

以下示例显示了在创建 PNG 图像并在其上绘制复杂图形时如何设置内存限制。内存限制是所有内部缓冲区的最大允许大小（以兆字节为单位）。

[C#]

string dir = "c:\\aspose.imaging\\issues\\net\\3383\\";

const int ImageSize = 2000;
Aspose.Imaging.ImageOptionsBase createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
createOptions.Source = new Aspose.Imaging.Sources.FileCreateSource(dir + "graphics_simple.png", false);
createOptions.BufferSizeHint = 30; // 内存限制为 30 Mb

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Create(createOptions, ImageSize, ImageSize))
{
    Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(image);
    // 这里可以使用任何图形操作，都将在既定的内存限制内执行
    // 例如：
    graphics.Clear(Aspose.Imaging.Color.LightSkyBlue);
    graphics.DrawLine(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Red, 3f), 0, 0, image.Width, image.Height);

    image.Save();
}

// 还支持大量的图形操作：
const int OperationAreaSize = 10;
createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
createOptions.Source = new Aspose.Imaging.Sources.FileCreateSource(dir + "graphics_complex.png", false);
createOptions.BufferSizeHint = 30; // 内存限制为 30 Mb

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Create(createOptions, ImageSize, ImageSize))
{
    Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(image);
    graphics.BeginUpdate();
    graphics.Clear(Aspose.Imaging.Color.LightSkyBlue);

    int x, y;
    int numberOfOperations = 0;
    for (int column = 0; column * OperationAreaSize < ImageSize; column++)
    {
        for (int row = 0; row * OperationAreaSize < ImageSize; row++)
        {
            x = column * OperationAreaSize;
            y = row * OperationAreaSize;

            bool reversed = (column + row) % 2 != 0;
            if (reversed)
            {
                graphics.DrawLine(
                    new Aspose.Imaging.Pen(Aspose.Imaging.Color.Red),
                    x + OperationAreaSize - 2,
                    y,
                    x,
                    y + OperationAreaSize);
            }
            else
            {
                graphics.DrawLine(
                    new Aspose.Imaging.Pen(Aspose.Imaging.Color.Red),
                    x,
                    y,
                    x + OperationAreaSize - 2,
                    y + OperationAreaSize);
            }

            numberOfOperations++;
        }
    }

    // 这里会应用大约 40k 的操作，但不会占用太多内存 
    // 因为它们已经被卸载到外部文件中，并且会从那里一次加载一个
    graphics.EndUpdate();

    image.Save();
}

也可以看看

FullFrame