public Bitmap Blur(Bitmap bitmap, float blurRadius)
{
// Allocation will use the same backing array of pixels as bitmap if created with USAGE_SHARED flag
using (var inAllocation = Allocation.CreateFromBitmap(_renderScript, bitmap)) {
if (!CanReuseAllocation(bitmap))
{
if (_outAllocation != null)
{
_outAllocation.Destroy();
_outAllocation.Dispose();
}
_outAllocation = Allocation.CreateTyped(_renderScript, inAllocation.Type);
_lastBitmapWidth = bitmap.Width;
_lastBitmapHeight = bitmap.Height;
}
_blurScript.SetRadius(blurRadius);
_blurScript.SetInput(inAllocation);
// Do not use inAllocation in forEach, it will caue visual artifacts on blurred bitmap
_blurScript.ForEach(_outAllocation);
_outAllocation.CopyTo(bitmap);
inAllocation.Destroy();
}
return(bitmap);
}
private void YUV_420_888_toRGBIntrinsicsProcess(int width, int height, byte[] yuv)
{
if (yuv.Length != _yuvLength)
{
Android.Renderscripts.Type.Builder yuvType =
new Android.Renderscripts.Type.Builder(rs, Element.U8(rs)).SetX(yuv.Length);
if (_input != null)
{
_input.Destroy();
}
_input = Allocation.CreateTyped(rs, yuvType.Create(), AllocationUsage.Script);
_yuvLength = yuv.Length;
}
if (_width != width || _height != height)
{
Android.Renderscripts.Type.Builder rgbaType = new Android.Renderscripts.Type.Builder(rs, Element.RGBA_8888(rs)).SetX(width).SetY(height);
if (_output != null)
{
_output.Destroy();
}
_output = Allocation.CreateTyped(rs, rgbaType.Create(), AllocationUsage.Script);
_width = width;
_height = height;
}
_input.CopyFromUnchecked(yuv);
_yuvToRgbIntrinsic.SetInput(_input);
_yuvToRgbIntrinsic.ForEach(_output);
}
public void Release()
{
if (_mBlurInput != null)
{
_mBlurInput.Destroy();
_mBlurInput = null;
}
if (_mBlurOutput != null)
{
_mBlurOutput.Destroy();
_mBlurOutput = null;
}
if (_mBlurScript != null)
{
_mBlurScript.Destroy();
_mBlurScript = null;
}
if (_mRenderScript != null)
{
_mRenderScript.Destroy();
_mRenderScript = null;
}
}
private void ReleaseBitmap()
{
if (mBlurInput != null)
{
mBlurInput.Destroy();
mBlurInput = null;
}
if (mBlurOutput != null)
{
mBlurOutput.Destroy();
mBlurOutput = null;
}
if (mBitmapToBlur != null)
{
mBitmapToBlur.Recycle();
mBitmapToBlur = null;
}
if (mBlurredBitmap != null)
{
mBlurredBitmap.Recycle();
mBlurredBitmap = null;
}
}
public void Release()
{
if (!_mBlurInput.IsNullOrDisposed())
{
_mBlurInput.Destroy();
_mBlurInput = null;
}
if (!_mBlurOutput.IsNullOrDisposed())
{
_mBlurOutput.Destroy();
_mBlurOutput = null;
}
if (!_mBlurScript.IsNullOrDisposed())
{
_mBlurScript.Destroy();
_mBlurScript = null;
}
if (!_mRenderScript.IsNullOrDisposed())
{
_mRenderScript.Destroy();
_mRenderScript = null;
}
}
public Bitmap blur(Bitmap bitmap, float radius, int repeat)
{
if (!IS_BLUR_SUPPORTED)
{
return(null);
}
if (radius > MAX_RADIUS)
{
radius = MAX_RADIUS;
}
int width = bitmap.Width;
int height = bitmap.Height;
// Create allocation type
Type bitmapType = new Type.Builder(rs, Element.RGBA_8888(rs))
.SetX(width)
.SetY(height)
.SetMipmaps(false) // We are using MipmapControl.MIPMAP_NONE
.Create();
// Create allocation
Allocation allocation = Allocation.CreateTyped(rs, bitmapType);
// Create blur script
ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.Create(rs, Element.U8_4(rs));
blurScript.SetRadius(radius);
// Copy data to allocation
allocation.CopyFrom(bitmap);
// set blur script input
blurScript.SetInput(allocation);
// invoke the script to blur
blurScript.ForEach(allocation);
// Repeat the blur for extra effect
for (int i = 0; i < repeat; i++)
{
blurScript.ForEach(allocation);
}
// copy data back to the bitmap
allocation.CopyTo(bitmap);
// release memory
allocation.Destroy();
blurScript.Destroy();
allocation = null;
blurScript = null;
return(bitmap);
}
Bitmap CreateBlurredImage(int radius)
{
Bitmap originalBitmap = BitmapFactory.DecodeResource(Resources, Resource.Drawable.imagebackground);
Bitmap blurredBitmap = Bitmap.CreateBitmap(originalBitmap);
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.Create(renderScript, Element.U8_4(renderScript));
Allocation input = Allocation.CreateFromBitmap(renderScript, originalBitmap, Allocation.MipmapControl.MipmapFull, AllocationUsage.Script);
script.SetInput(input);
script.SetRadius(radius);
Allocation output = Allocation.CreateTyped(renderScript, input.Type);
script.ForEach(output);
output.CopyTo(blurredBitmap);
output.Destroy();
input.Destroy();
script.Destroy();
return(blurredBitmap);
}
private void CreateBlurredImage(int radius)
{
// Load a clean bitmap and work from that.
Bitmap originalBitmap = BitmapFactory.DecodeResource(Resources, Resource.Drawable.dog_and_monkeys);
if (blurredBmp != null)
{
blurredBmp.Recycle();
blurredBmp.Dispose();
blurredBmp = null;
}
// Create another bitmap that will hold the results of the filter.
blurredBmp = Bitmap.CreateBitmap(originalBitmap);
// Create the Renderscript instance that will do the work.
RenderScript rs = RenderScript.Create(this);
// Allocate memory for Renderscript to work with
Allocation input = Allocation.CreateFromBitmap(rs, originalBitmap, Allocation.MipmapControl.MipmapFull, Allocation.UsageScript);
Allocation output = Allocation.CreateTyped(rs, input.Type);
// Load up an instance of the specific script that we want to use.
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.Create(rs, Element.U8_4(rs));
script.SetInput(input);
// Set the blur radius
script.SetRadius(radius);
// Start Renderscript working.
script.ForEach(output);
// Copy the output to the blurred bitmap
output.CopyTo(blurredBmp);
input.Destroy();
input.Dispose();
output.Destroy();
output.Dispose();
}
Bitmap CreateBlurredImage(int radius)
{
// Load a clean bitmap to work from.
Bitmap originalBitmap = BitmapFactory.DecodeResource(Resources, Resource.Drawable.dog_and_monkeys);
// Create another bitmap that will hold the results of the filter.
Bitmap blurredBitmap = Bitmap.CreateBitmap(originalBitmap);
// Load up an instance of the specific script that we want to use.
// An Element is similar to a C type. The second parameter, Element.U8_4,
// tells the Allocation is made up of 4 fields of 8 unsigned bits.
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.Create(renderScript, Element.U8_4(renderScript));
// Create an Allocation for the kernel inputs.
Allocation input = Allocation.CreateFromBitmap(renderScript, originalBitmap,
Allocation.MipmapControl.MipmapFull,
AllocationUsage.Script);
// Assign the input Allocation to the script.
script.SetInput(input);
// Set the blur radius
script.SetRadius(radius);
// Finally we need to create an output allocation to hold the output of the Renderscript.
Allocation output = Allocation.CreateTyped(renderScript, input.Type);
// Next, run the script. This will run the script over each Element in the Allocation, and copy it's
// output to the allocation we just created for this purpose.
script.ForEach(output);
// Copy the output to the blurred bitmap
output.CopyTo(blurredBitmap);
// Cleanup.
output.Destroy();
input.Destroy();
script.Destroy();
return(blurredBitmap);
}
