/// <summary>
/// 合并N张图片（网络/本地）
/// </summary>
/// <param name="imageUrls">图片路径（网路路径或者本地路径）</param>
/// <param name="size"></param>
/// <returns></returns>
public static async Task <Image> MergeImagesAsync(List <string> imageUrls, MergeLayoutEnum mergeLayout, Size size)
{
if (imageUrls == null || imageUrls.Count <= 0)
{
return(null);
}
return(await MergeImagesInternalAsync(imageUrls, mergeLayout, size));
}
private static async Task TestMerge(string type, List <string> imagePath, MergeLayoutEnum layout, Size size)
{
var m1 = await ImageMergeHelper.MergeImagesAsync(imagePath, layout, size);
var m1Path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, type + "-" + layout.ToString() + ".png");
if (File.Exists(m1Path))
{
File.Delete(m1Path);
}
m1.Save(m1Path);
}
/// <summary>
/// 合并2张图片
/// </summary>
/// <param name="image1"></param>
/// <param name="image2"></param>
/// <param name="layout"></param>
/// <returns></returns>
private static Image MergeImages(List <Image> imageList, Size size, MergeLayoutEnum layout = MergeLayoutEnum.Merge2LR)
{
var width = size.Width;
var height = size.Height;
var pf = PixelFormat.Format32bppArgb;
using (var bg = new Bitmap(width, height, pf))
{
using (var g = Graphics.FromImage(bg))
{
g.FillRectangle(Brushes.Transparent, 0, 0, width, height);
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.HighQuality;
g.CompositingQuality = CompositingQuality.HighQuality;
List <ImageElement> list = GetImageElements(imageList, size, layout);
list.ForEach(data =>
{
var dest = ZoomRectangle(data.Image.Width, data.Image.Height, data.DestRectangle.Height, data.DestRectangle.Width);
dest = new Rectangle(dest.X + data.DestRectangle.X + data.OffsetX, dest.Y + data.DestRectangle.Y + data.OffsetY, dest.Width, dest.Height);
g.DrawImage(data.Image, dest, data.SrcRectangle, GraphicsUnit.Pixel);
data.Image.Dispose();
});
g.Save();
}
imageList.ForEach(image => { image.Dispose(); });
using (var ms = new MemoryStream())
{
bg.Save(ms, ImageFormat.Png);
var buffers = ms.ToArray();
return(ConvertToImage(buffers));
}
}
}
private static async Task <Image> MergeImagesInternalAsync(List <string> imageUrls, MergeLayoutEnum mergeLayout, Size size)
{
int picCount = 0;
var stringLayout = mergeLayout.ToString();
if (stringLayout.StartsWith("Merge1C"))
{
picCount = 1;
}
else if (stringLayout.StartsWith("Merge2"))
{
picCount = 2;
}
else if (stringLayout.StartsWith("Merge3"))
{
picCount = 3;
}
else if (stringLayout.StartsWith("Merge4"))
{
picCount = 4;
}
else if (stringLayout.StartsWith("Merge8"))
{
picCount = 8;
}
if (imageUrls.Count < picCount)
{
throw new ArgumentException("argument invalid.");
}
List <Image> list = new List <Image>(picCount);
for (int i = 0; i < picCount; i++)
{
var bytes = await GetImageByteArrayAsync(imageUrls[i]);
if (bytes != null && bytes.Length > 0)
{
list.Add(ConvertToImage(bytes));
}
}
var result = MergeImages(list, size, mergeLayout);
return(result);
}
private static List <ImageElement> GetImageElements(List <Image> images, Size size, MergeLayoutEnum mergeLayout)
{
List <ImageElement> list = new List <ImageElement>();
var height = size.Height;
var width = size.Width;
int newHeight = 0;
int newWidth = 0;
switch (mergeLayout)
{
case MergeLayoutEnum.Merge1C:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle = new Rectangle(0, 0, width, height);
var imageElement = GenerateImageElement(images[i], destRectangle, OffsetXType.NoOffsetX, OffsetYType.NoOffsetY);
list.Add(imageElement);
}
break;
case MergeLayoutEnum.Merge2TB:
for (int i = 0; i < images.Count; i++)
{
newHeight = height / 2; // =125
newWidth = width; // =250
(var zoomImage, var dest) = ZoomImage(images[i], newHeight, newWidth, true);
var element = new ImageElement {
Image = zoomImage, SrcRectangle = new Rectangle(0, 0, zoomImage.Width, zoomImage.Height)
};
element.DestRectangle = new Rectangle(0, 0, newWidth, newHeight);
if (i == 0)
{
element.OffsetY = dest.Y;
}
else if (i == 1)
{
element.DestRectangle = new Rectangle(0, size.Height / 2, newWidth, newHeight);
element.OffsetY = -dest.Y;
}
list.Add(element);
}
break;
case MergeLayoutEnum.Merge2LR:
for (int i = 0; i < images.Count; i++)
{
newWidth = width / 2; // =125
newHeight = height; // =250
(var zoomImage, var dest) = ZoomImage(images[i], newHeight, newWidth, true);
var element = new ImageElement {
Image = zoomImage, SrcRectangle = new Rectangle(0, 0, zoomImage.Width, zoomImage.Height)
};
element.DestRectangle = new Rectangle(0, 0, newWidth, newHeight);
if (i == 0)
{
element.OffsetX = dest.X;
}
if (i == 1)
{
element.DestRectangle = new Rectangle(size.Width / 2, 0, newWidth, newHeight);
element.OffsetX = -dest.X;
}
list.Add(element);
}
break;
case MergeLayoutEnum.Merge3T1B2:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle;
OffsetXType offsetX = OffsetXType.NoOffsetX;
OffsetYType offsetY = OffsetYType.NoOffsetY;
if (i == 0)
{
newHeight = height / 2; // =125
newWidth = width; // =250
destRectangle = new Rectangle(0, 0, newWidth, newHeight);
offsetY = OffsetYType.PositiveY;
}
else if (i == 1)
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(0, height / 2, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
offsetY = OffsetYType.NegativeY;
}
else
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(width / 2, height / 2, newWidth, newHeight);
offsetY = OffsetYType.NegativeY;
offsetX = OffsetXType.NegativeX;
}
var imageElement = GenerateImageElement(images[i], destRectangle, offsetX, offsetY);
list.Add(imageElement);
}
break;
case MergeLayoutEnum.Merge3T2B1:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle;
OffsetXType offsetX = OffsetXType.NoOffsetX;
OffsetYType offsetY = OffsetYType.NoOffsetY;
if (i == 0)
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(0, 0, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
offsetY = OffsetYType.PositiveY;
}
else if (i == 1)
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(width / 2, 0, newWidth, newHeight);
offsetY = OffsetYType.PositiveY;
offsetX = OffsetXType.NegativeX;
}
else
{
newHeight = height / 2; // =125
newWidth = width; // =250
destRectangle = new Rectangle(0, height / 2, newWidth, newHeight);
offsetY = OffsetYType.NegativeY;
}
var imageElement = GenerateImageElement(images[i], destRectangle, offsetX, offsetY);
list.Add(imageElement);
}
break;
case MergeLayoutEnum.Merge3L1R2:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle;
OffsetXType offsetX = OffsetXType.NoOffsetX;
OffsetYType offsetY = OffsetYType.NoOffsetY;
if (i == 0)
{
newHeight = height; // =250
newWidth = width / 2; // =125
destRectangle = new Rectangle(0, 0, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
}
else if (i == 1)
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(width / 2, 0, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
offsetY = OffsetYType.PositiveY;
}
else
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(width / 2, height / 2, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
offsetY = OffsetYType.NegativeY;
}
var imageElement = GenerateImageElement(images[i], destRectangle, offsetX, offsetY);
list.Add(imageElement);
}
break;
case MergeLayoutEnum.Merge3L2R1:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle;
OffsetXType offsetX = OffsetXType.NoOffsetX;
OffsetYType offsetY = OffsetYType.NoOffsetY;
if (i == 0)
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(0, 0, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
offsetY = OffsetYType.PositiveY;
}
else if (i == 1)
{
newHeight = height / 2; // =125
newWidth = width / 2; // =125
destRectangle = new Rectangle(0, height / 2, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
offsetY = OffsetYType.NegativeY;
}
else
{
newHeight = height; // =250
newWidth = width / 2; // =125
destRectangle = new Rectangle(width / 2, 0, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
}
var imageElement = GenerateImageElement(images[i], destRectangle, offsetX, offsetY);
list.Add(imageElement);
}
break;
case MergeLayoutEnum.Merge4S:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle;
newHeight = height / 2; // =125
newWidth = width / 2; // =125
OffsetXType offsetX = OffsetXType.NoOffsetX;
OffsetYType offsetY = OffsetYType.NoOffsetY;
if (i == 0)
{
destRectangle = new Rectangle(0, 0, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
offsetY = OffsetYType.PositiveY;
}
else if (i == 1)
{
destRectangle = new Rectangle(width / 2, 0, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
offsetY = OffsetYType.PositiveY;
}
else if (i == 2)
{
destRectangle = new Rectangle(0, height / 2, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
offsetY = OffsetYType.NegativeY;
}
else
{
destRectangle = new Rectangle(width / 2, height / 2, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
offsetY = OffsetYType.NegativeY;
}
var imageElement = GenerateImageElement(images[i], destRectangle, offsetX, offsetY);
list.Add(imageElement);
}
break;
case MergeLayoutEnum.Merge8T4B4:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle;
newHeight = height / 2; // =125
newWidth = width / 4; // =125
OffsetXType offsetX = OffsetXType.NoOffsetX;
OffsetYType offsetY = OffsetYType.NoOffsetY;
if (i == 0)
{
destRectangle = new Rectangle(0, 0, newWidth, newHeight);
offsetY = OffsetYType.PositiveY;
}
else if (i == 1)
{
destRectangle = new Rectangle(width / 4, 0, newWidth, newHeight);
offsetY = OffsetYType.PositiveY;
}
else if (i == 2)
{
destRectangle = new Rectangle(width / 2, 0, newWidth, newHeight);
offsetY = OffsetYType.PositiveY;
}
else if (i == 3)
{
destRectangle = new Rectangle(width / 4 * 3, 0, newWidth, newHeight);
offsetY = OffsetYType.PositiveY;
}
else if (i == 4)
{
destRectangle = new Rectangle(0, height / 2, newWidth, newHeight);
offsetY = OffsetYType.NegativeY;
}
else if (i == 5)
{
destRectangle = new Rectangle(width / 4, height / 2, newWidth, newHeight);
offsetY = OffsetYType.NegativeY;
}
else if (i == 6)
{
destRectangle = new Rectangle(width / 2, height / 2, newWidth, newHeight);
offsetY = OffsetYType.NegativeY;
}
else
{
destRectangle = new Rectangle(width / 4 * 3, height / 2, newWidth, newHeight);
offsetY = OffsetYType.NegativeY;
}
var imageElement = GenerateImageElement(images[i], destRectangle, offsetX, offsetY);
list.Add(imageElement);
}
break;
case MergeLayoutEnum.Merge8L4R4:
for (int i = 0; i < images.Count; i++)
{
Rectangle destRectangle;
newHeight = height / 4; // =125
newWidth = width / 2; // =125
OffsetXType offsetX = OffsetXType.NoOffsetX;
OffsetYType offsetY = OffsetYType.NoOffsetY;
if (i == 0)
{
destRectangle = new Rectangle(0, 0, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
}
else if (i == 1)
{
destRectangle = new Rectangle(0, height / 4, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
}
else if (i == 2)
{
destRectangle = new Rectangle(0, height / 2, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
}
else if (i == 3)
{
destRectangle = new Rectangle(0, height / 4 * 3, newWidth, newHeight);
offsetX = OffsetXType.PositiveX;
}
else if (i == 4)
{
destRectangle = new Rectangle(width / 2, 0, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
}
else if (i == 5)
{
destRectangle = new Rectangle(width / 2, height / 4, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
}
else if (i == 6)
{
destRectangle = new Rectangle(width / 2, height / 2, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
}
else
{
destRectangle = new Rectangle(width / 2, height / 4 * 3, newWidth, newHeight);
offsetX = OffsetXType.NegativeX;
}
var imageElement = GenerateImageElement(images[i], destRectangle, offsetX, offsetY);
list.Add(imageElement);
}
break;
}
return(list);
}
