/// <summary>
/// 将图片逆时针旋转degress度，返回旋转后的图片对象。
/// </summary>
/// <param name="img">图片</param>
/// <param name="x">旋转中心x坐标，默认为图片中点</param>
/// <param name="y">旋转中心y坐标，默认为图片中点</param>
/// <param name="degree">旋转角度。</param>
/// <returns></returns>
public ImageWrapper rotate(ImageWrapper img, float x, float y, float degree)
{
var matrix = new Matrix();
matrix.PostRotate(degree, x, y);
return(ImageWrapper.OfBitmap(Bitmap.CreateBitmap(img.Bitmap, 0, 0, img.Width, img.Height, matrix, true)));
}
public Bitmap getRoundedShape(Bitmap scaleBitmapImage)
{
int targetWidth = 110;
int targetHeight = 110;
Bitmap targetBitmap = Bitmap.CreateBitmap(targetWidth,
targetHeight, Bitmap.Config.Argb4444);
Canvas canvas = new Canvas(targetBitmap);
Android.Graphics.Path path = new Android.Graphics.Path();
path.AddCircle(((float)targetWidth - 1) / 2,
((float)targetHeight - 1) / 2,
(Math.Min(((float)targetWidth),
((float)targetHeight)) / 2),
Android.Graphics.Path.Direction.Ccw);
canvas.ClipPath(path);
Bitmap sourceBitmap = scaleBitmapImage;
canvas.DrawBitmap(sourceBitmap,
new Rect(0, 0, sourceBitmap.Width,
sourceBitmap.Height),
new Rect(0, 0, targetWidth, targetHeight), null);
return(targetBitmap);
}
/// <summary>
/// 从图片img的位置(x, y)处剪切大小为w * h的区域，并返回该剪切区域的新图片。
/// </summary>
/// <param name="img">图片</param>
/// <param name="x">剪切区域的左上角横坐标</param>
/// <param name="y">剪切区域的左上角纵坐标</param>
/// <param name="x2">剪切区域的宽度</param>
/// <param name="y2">剪切区域的高度</param>
/// <returns></returns>
public ImageWrapper clip(ImageWrapper img, int x, int y, int x2, int y2)
{
var w = x2 - x;
var h = y2 - y;
return(ImageWrapper.OfBitmap(Bitmap.CreateBitmap(img.Bitmap, x, y, w, h)));
}
private SkiaSharp.SKSurface CreateSurface(out SkiaSharp.SKImageInfo info)
{
// get context details
info = this.info;
// if there are no pixels, clean up and return
if (info.Width == 0 || info.Height == 0)
{
Dispose();
return(null);
}
// if the memory size has changed, then reset the underlying memory
if (bitmap?.Handle == IntPtr.Zero || bitmap?.Width != info.Width || bitmap?.Height != info.Height)
{
FreeBitmap();
}
// create the bitmap data if we need it
if (bitmap == null)
{
bitmap = ABitmap.CreateBitmap(info.Width, info.Height, ABitmap.Config.Argb8888);
}
return(SkiaSharp.SKSurface.Create(info, bitmap.LockPixels(), info.RowBytes));
}
//LA ACTIVIDAD RESULTADO DEL INTENTO DE ARRIBA
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
if ((requestCode == PickImageId) && (resultCode == Result.Ok) && (data != null))
{
ISharedPreferences preff = PreferenceManager.GetDefaultSharedPreferences(this);
var jee = preff.GetString("Usuario", "");
//SE AGREGA LA IMAGEN AL IMAGEVIEW Y SU URL INTERNO
string path;
Uri uri = data.Data;
path = GetPathToImage(uri);
Bitmap cool = BitmapFactory.DecodeFile(path);
logoimage.SetImageBitmap(cool);
//MEDIANTE EL URL INTERNO SE CREA UN BITMAP INTERNO PARA POSTERIORMENTE SER CONVERTIDO EN BYTE[] Y ALMACENADO EN MYSQL
Bitmap seco = Bitmap.CreateBitmap(BitmapFactory.DecodeFile(path));
var nel = new MemoryStream();
seco.Compress(Bitmap.CompressFormat.Png, 0, nel);
byte [] bitmapData = nel.ToArray();
//FORMA CORRECTA PARA SUBIR UNA IMAGEN A MYSQL
var final = new MySqlCommand("UPDATE `TapFood`.`Restaurantes` SET `LogoRestaurante`= @logo WHERE(`IdRestaurante` = @iduser)", conn);
final.Parameters.Add(new MySqlParameter("logo", MySqlDbType.MediumBlob)).Value = bitmapData;
final.Parameters.Add(new MySqlParameter("iduser", MySqlDbType.String)).Value = jee.ToString();
final.ExecuteNonQuery();
Toast.MakeText(this, "Listo, hemos actualizado la imagen".ToString(), ToastLength.Long).Show();
}
}
private Bitmap CreateBufferImage()
{
if (paths == null || paths.Count == 0)
{
return(null);
}
var size = new SizeF(Width, Height);
var image = Bitmap.CreateBitmap((int)size.Width, (int)size.Height, Bitmap.Config.Argb8888);
using (var canvas = new Canvas(image))
using (var paint = new Paint())
{
paint.StrokeJoin = Paint.Join.Round;
paint.StrokeCap = Paint.Cap.Round;
paint.AntiAlias = true;
paint.SetStyle(Paint.Style.Stroke);
foreach (var path in paths)
{
paint.Color = path.Color;
paint.StrokeWidth = path.Width * ScreenDensity;
canvas.DrawPath(path.Path, paint);
path.IsDirty = false;
}
}
return(image);
}
public void DrawBitmap(Bitmap bmp, Rect sourceRect, Rect rect)
{
var bitmap = AndroidBitmap.CreateBitmap(bmp.Width, bmp.Height, AndroidBitmap.Config.Argb8888);
bitmap.SetPixels(bmp.Bytes.ToIntArray(), 0, bmp.Width, 0, 0, bmp.Width, bmp.Height);
canvas.DrawBitmap(bitmap, sourceRect.ToRect(), rect.ToRectF(), null);
}
public IBitmapImplementation Crop(IntRectangle cropArea)
{
return(new BitmapImplementation(
AndroidBitmap.CreateBitmap(
Bitmap,
cropArea.Left,
cropArea.Top,
cropArea.Width,
cropArea.Height)));
}
public BitmapImplementation(Color4[] data, int width, int height)
{
var colors = new int[data.Length];
for (int i = 0; i < data.Length; i++)
{
var pixel = data[i];
colors[i] = Color4.CreateArgb(pixel.A, pixel.R, pixel.G, pixel.B);
}
Bitmap = AndroidBitmap.CreateBitmap(colors, width, height, AndroidBitmap.Config.Argb8888);
Bitmap.HasAlpha = Lime.Bitmap.AnyAlpha(data);
}
private MemoryStream RenderToBitmapStreamPrivate(IViewport viewport, IEnumerable <ILayer> layers)
{
Bitmap target = Bitmap.CreateBitmap((int)viewport.Width, (int)viewport.Height, Bitmap.Config.Argb8888);
var canvas = new Canvas(target);
Render(canvas, viewport, layers, ShowDebugInfoInMap);
var stream = new MemoryStream();
target.Compress(Bitmap.CompressFormat.Png, 100, stream);
target.Dispose();
canvas.Dispose();
return(stream);
}
public static bool Reshape(ref ANDROIDBITMAP bmp, ANDROIDBITMAP.Config fmt, int w, int h)
{
if (w <= 0 || w <= 0)
{
if (bmp == null)
{
return(false);
}
System.Threading.Interlocked.Exchange(ref bmp, null)?.Dispose();
return(true);
}
if (bmp == null)
{
bmp = ANDROIDBITMAP.CreateBitmap(w, h, fmt);
return(true);
}
return(Reshape(bmp, fmt, w, h));
}
/// <summary>
/// 连接两张图片，并返回连接后的图像。如果两张图片大小不一致，小的那张将适当居中。
/// </summary>
/// <param name="img1">图片1</param>
/// <param name="img2">图片2</param>
/// <param name="direction">连接方向，默认为"RIGHT"，可选的值有：
/// LEFT 将图片2接到图片1左边
/// RIGHT 将图片2接到图片1右边
/// TOP 将图片2接到图片1上边
/// BOTTOM 将图片2接到图片1下边
/// </param>
/// <returns></returns>
public ImageWrapper concat(ImageWrapper img1, ImageWrapper img2, GravityFlags direction)
{
int width;
int height;
if (direction == GravityFlags.Left || direction == GravityFlags.Top)
{
var tmp = img1;
img1 = img2;
img2 = tmp;
}
if (direction == GravityFlags.Left || direction == GravityFlags.Right)
{
width = img1.Width + img2.Width;
height = Math.Max(img1.Height, img2.Height);
}
else
{
width = Math.Max(img1.Width, img2.Height);
height = img1.Height + img2.Height;
}
var bitmap = Bitmap.CreateBitmap(width, height, Bitmap.Config.Argb8888);
var canvas = new Canvas();
var paint = new Paint();
if (direction != GravityFlags.Left && direction != GravityFlags.Right)
{
return(ImageWrapper.OfBitmap(bitmap));
}
canvas.DrawBitmap(img1.Bitmap, (width - img1.Width) / 2, 0, paint);
canvas.DrawBitmap(img2.Bitmap, (width - img2.Width) / 2, img1.Height, paint);
return(ImageWrapper.OfBitmap(bitmap));
}
public ANDROIDBITMAP CreateCompatibleBitmap()
{
return(ANDROIDBITMAP.CreateBitmap(_Info.Width, _Info.Height, _Compatible));
}
