private static Stretch GetStretch(Xamarin.Forms.Aspect aspect)
{
switch (aspect)
{
case Xamarin.Forms.Aspect.AspectFill:
return(Stretch.UniformToFill);
case Xamarin.Forms.Aspect.Fill:
return(Stretch.Fill);
default:
return(Stretch.Uniform);
}
}
public ImageSlideAdapter(Context _context, List <string> _imageItems, Xamarin.Forms.Aspect aspect)
{
imageItems = _imageItems;
context = _context;
switch (aspect)
{
case Xamarin.Forms.Aspect.Fill:
scaleType = ImageView.ScaleType.FitXy;
break;
case Xamarin.Forms.Aspect.AspectFill:
scaleType = ImageView.ScaleType.CenterCrop;
break;
case Xamarin.Forms.Aspect.AspectFit:
scaleType = ImageView.ScaleType.FitCenter;
break;
}
}
public void DrawImage(IImage image, float x, float y, float width, float height, Xamarin.Forms.Aspect aspect)
{
if (image != null)
{
CGImage cgImage = ((Image)image).NativeImage;
if (cgImage != null)
{
if (aspect == Xamarin.Forms.Aspect.Fill)
{
context.DrawImage(new CGRect(x, y, width, height), cgImage);
}
else
{
Xamarin.Forms.Size bounding = new Xamarin.Forms.Size(width, height);
if (aspect == Xamarin.Forms.Aspect.AspectFill)
{
Xamarin.Forms.Rectangle imageBox = MathHelper.Fill(new Xamarin.Forms.Rectangle(Xamarin.Forms.Point.Zero, image.Size), bounding);
using (CGImage newImage = cgImage.WithImageInRect(new CGRect(imageBox.X, imageBox.Y, imageBox.Width, imageBox.Height)))
context.DrawImage(new CGRect(x, y, width, height), newImage);
}
else
{
Xamarin.Forms.Rectangle boundingBox = MathHelper.Fit(image.Size, new Xamarin.Forms.Rectangle(x, y, width, height));
context.DrawImage(new CGRect(boundingBox.X, boundingBox.Y, boundingBox.Width, boundingBox.Height), cgImage);
}
}
}
context.DrawImage(new CGRect(x, y, width, height), cgImage);
}
}
public void DrawImage(IImage image, float x, float y, float width, float height, Xamarin.Forms.Aspect aspect)
{
if (image != null)
{
CanvasBitmap bitmap = ((Image)image).NativeBitmap;
if (bitmap != null)
{
if (aspect == Xamarin.Forms.Aspect.Fill)
{
ds.DrawImage(bitmap, new Rect(x, y, width, height));
}
else
{
Xamarin.Forms.Size bounding = new Xamarin.Forms.Size(width, height);
if (aspect == Xamarin.Forms.Aspect.AspectFill)
{
Xamarin.Forms.Rectangle imageBox = MathHelper.Fill(new Xamarin.Forms.Rectangle(Xamarin.Forms.Point.Zero, image.Size), bounding);
ds.DrawImage(bitmap, new Rect(x, y, width, height), new Rect(imageBox.X, imageBox.Y, imageBox.Width, imageBox.Height));
}
else
{
Xamarin.Forms.Rectangle boundingBox = MathHelper.Fit(image.Size, new Xamarin.Forms.Rectangle(x, y, width, height));
ds.DrawImage(bitmap, new Rect(boundingBox.X, boundingBox.Y, boundingBox.Width, boundingBox.Height));
}
}
}
}
}
public void DrawImage(IImage image, float x, float y, float width, float height, Xamarin.Forms.Aspect aspect)
{
if (image != null)
{
Bitmap bitmap = ((Image)image).NativeImage;
if (bitmap != null)
{
if (aspect == Xamarin.Forms.Aspect.Fill)
{
using (RectF rect = new RectF(x, y, x + width - 1, y + height - 1))
canvas.DrawBitmap(bitmap, null, rect, null);
}
else
{
Xamarin.Forms.Size bounding = new Xamarin.Forms.Size(width, height);
if (aspect == Xamarin.Forms.Aspect.AspectFill)
{
Xamarin.Forms.Rectangle imageBox = MathHelper.Fill(new Xamarin.Forms.Rectangle(Xamarin.Forms.Point.Zero, image.Size), bounding);
using (RectF rectB = new RectF(x, y, x + width - 1, y + height - 1))
using (Rect rectI = new Rect((int)imageBox.X, (int)imageBox.Y, (int)imageBox.X + (int)imageBox.Width - 1, (int)imageBox.Y + (int)imageBox.Height - 1))
canvas.DrawBitmap(bitmap, rectI, rectB, null);
}
else
{
Xamarin.Forms.Rectangle boundingBox = MathHelper.Fit(image.Size, new Xamarin.Forms.Rectangle(x, y, width, height));
using (RectF rect = new RectF((float)boundingBox.X, (float)boundingBox.Y, (float)boundingBox.X + (float)boundingBox.Width - 1, (float)boundingBox.Y + (float)boundingBox.Height - 1))
canvas.DrawBitmap(bitmap, null, rect, null);
}
}
}
}
}
