【发布时间】：2022-01-09 08:41:52
【问题描述】：
我有动画 gif，我正在使用一个类来解析其中的图像（帧）。 班级是：
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Collections.Generic;
using System.IO;
public class AnimatedGif
{
private List<AnimatedGifFrame> mImages = new List<AnimatedGifFrame>();
public AnimatedGif(string path)
{
Image img = Image.FromFile(path);
int frames = img.GetFrameCount(FrameDimension.Time);
if (frames <= 1) throw new ArgumentException("Image not animated");
byte[] times = img.GetPropertyItem(0x5100).Value;
int frame = 0;
for (; ; )
{
int dur = BitConverter.ToInt32(times, 4 * frame);
mImages.Add(new AnimatedGifFrame(new Bitmap(img), dur));
if (++frame >= frames) break;
img.SelectActiveFrame(FrameDimension.Time, frame);
}
img.Dispose();
}
public List<AnimatedGifFrame> Images { get { return mImages; } }
}
public class AnimatedGifFrame
{
private int mDuration;
private Image mImage;
internal AnimatedGifFrame(Image img, int duration)
{
mImage = img; mDuration = duration;
}
public Image Image { get { return mImage; } }
public int Duration { get { return mDuration; } }
}
现在在 form1 中，我在这种情况下循环帧 4，我想将动画旋转任意角度。现在它每旋转 45 或 90 度。我想为动画添加更多帧（图像），所以如果我将旋转设置为 31 或 10 度，我会看到动画旋转 10 度。
这是 Form1 中的代码，它不能正常工作。我正在使用一个我尚未测试的旋转函数是否有效。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace AnimatedGifEditor
{
public partial class Form1 : Form
{
Image myImage;
AnimatedGif myGif;
Bitmap bitmap;
public Form1()
{
InitializeComponent();
myImage = Image.FromFile(@"D:\fananimation.gif");
myGif = new AnimatedGif(@"D:\fananimation.gif");
for (int i = 0; i < myGif.Images.Count; i++)
{
pictureBox1.Image = myGif.Images[3].Image;
bitmap = new Bitmap(pictureBox1.Image);
rotateImage(bitmap, 76);
pictureBox1.Image = bitmap;
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
private Bitmap RotateImg(Bitmap bmp, float angle, Color bkColor)
{
int w = bmp.Width;
int h = bmp.Height;
bmp.PixelFormat pf = default(bmp.PixelFormat);
if (bkColor == Color.Transparent)
{
pf = bmp.Format32bppArgb;
}
else
{
pf = bmp.PixelFormat;
}
Bitmap tempImg = new Bitmap(w, h, pf);
Graphics g = Graphics.FromImage(tempImg);
g.Clear(bkColor);
g.DrawImageUnscaled(bmp, 1, 1);
g.Dispose();
GraphicsPath path = new GraphicsPath();
path.AddRectangle(new RectangleF(0f, 0f, w, h));
Matrix mtrx = new Matrix();
//Using System.Drawing.Drawing2D.Matrix class
mtrx.Rotate(angle);
RectangleF rct = path.GetBounds(mtrx);
Bitmap newImg = new Bitmap(Convert.ToInt32(rct.Width), Convert.ToInt32(rct.Height), pf);
g = Graphics.FromImage(newImg);
g.Clear(bkColor);
g.TranslateTransform(-rct.X, -rct.Y);
g.RotateTransform(angle);
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.DrawImageUnscaled(tempImg, 0, 0);
g.Dispose();
tempImg.Dispose();
return newImg;
}
}
}
我用于测试的动画 gif 可以在这里找到：
【问题讨论】：
-
"Im using a function for the rotation wich i didnt test yet if its any working."测试然后询问是否有问题。
标签： c#