RemoveAllFrames

ApngImage.RemoveAllFrames method

从自己的帧集合中删除所有帧。

public void RemoveAllFrames()

例子

以下示例显示如何从另一个光栅单页图像创建 APNG 图像。

[C#]

using Aspose.Imaging;
using Aspose.Imaging.ImageOptions;
using Aspose.Imaging.FileFormats.Apng;

const int AnimationDuration = 1000; // 1 秒
const int FrameDuration = 70; // 70 毫秒
using (RasterImage sourceImage = (RasterImage)Image.Load("not_animated.png"))
{
    ApngOptions createOptions = new ApngOptions
    {
        Source = new FileCreateSource("raster_animation.png", false),
        DefaultFrameTime = (uint)FrameDuration,
        ColorType = PngColorType.TruecolorWithAlpha,
    };

    using (ApngImage apngImage = (ApngImage)Image.Create(
        createOptions,
        sourceImage.Width,
        sourceImage.Height))
    {
        // 可以在那里设置图像默认帧时间：apngImage.DefaultFrameTime = (uint)FrameDuration;

        int numOfFrames = AnimationDuration / FrameDuration;
        int numOfFrames2 = numOfFrames / 2;

        // 清理因为图片默认包含一帧
        apngImage.RemoveAllFrames();

        // 添加第一帧
        apngImage.AddFrame(sourceImage);

        // 添加中间帧
        for (int frameIndex = 1; frameIndex < numOfFrames - 1; ++frameIndex)
        {
            apngImage.AddFrame(sourceImage);
            ApngFrame lastFrame = (ApngFrame)apngImage.Pages[apngImage.PageCount - 1];
            float gamma = frameIndex >= numOfFrames2 ? numOfFrames - frameIndex - 1 : frameIndex;
            lastFrame.AdjustGamma(gamma);
        }

        // 添加最后一帧
        apngImage.AddFrame(sourceImage);

        apngImage.Save();
    }
}

也可以看看

PopFrameAt RemoveFrameAt