public static Drawable createBlurredImageFromBitmap(
Bitmap bitmap, Context context, int inSampleSize) {
RenderScript rs = RenderScript.create(context);
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = inSampleSize;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] imageInByte = stream.toByteArray();
ByteArrayInputStream bis = new ByteArrayInputStream(imageInByte);
Bitmap blurTemplate = BitmapFactory.decodeStream(bis, null, options);
final android.support.v8.renderscript.Allocation input =
android.support.v8.renderscript.Allocation.createFromBitmap(rs, blurTemplate);
final android.support.v8.renderscript.Allocation output =
android.support.v8.renderscript.Allocation.createTyped(rs, input.getType());
final android.support.v8.renderscript.ScriptIntrinsicBlur script =
android.support.v8.renderscript.ScriptIntrinsicBlur.create(
rs, android.support.v8.renderscript.Element.U8_4(rs));
script.setRadius(8f);
script.setInput(input);
script.forEach(output);
output.copyTo(blurTemplate);
Drawable dr = new BitmapDrawable(blurTemplate);
return dr;
}
@Override
protected void createFilter(
android.content.res.Resources res, float scaleFactor, int quality, Allocation in) {
RenderScript rsCtx = getRenderScriptContext();
Type.Builder tb_float = new Type.Builder(rsCtx, Element.F32_4(rsCtx));
tb_float.setX(in.getType().getX());
tb_float.setY(in.getType().getY());
mScript = new ScriptC_grad(rsCtx, res, R.raw.grad);
}
private void runSelectiveAdjust(Allocation in, Allocation out) {
int width = in.getType().getX();
int height = in.getType().getY();
LaunchOptions options = new LaunchOptions();
int ty;
options.setX(0, width);
for (ty = 0; ty < height; ty += STRIP_SIZE) {
int endy = ty + STRIP_SIZE;
if (endy > height) {
endy = height;
}
options.setY(ty, endy);
mScript.forEach_selectiveAdjust(in, out, options);
if (checkStop()) {
return;
}
}
}
private static void blurRenderScript(Bitmap bitmap, float radius) {
Allocation inAllocation =
Allocation.createFromBitmap(
renderScript, bitmap, Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
Allocation outAllocation = Allocation.createTyped(renderScript, inAllocation.getType());
blurShader.setRadius(radius);
blurShader.setInput(inAllocation);
blurShader.forEach(outAllocation);
outAllocation.copyTo(bitmap);
}
public static Bitmap blurBitmap(Bitmap bitmapToBlur, Context context) {
RenderScript rs = RenderScript.create(context);
// use this constructor for best performance, because it uses USAGE_SHARED mode which reuses
// memory
final Allocation input = Allocation.createFromBitmap(rs, bitmapToBlur);
final Allocation output = Allocation.createTyped(rs, input.getType());
final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setRadius(16f);
script.setInput(input);
script.forEach(output);
output.copyTo(bitmapToBlur);
return bitmapToBlur;
}
@SuppressLint("NewApi")
public static Bitmap blur(Context context, Bitmap sentBitmap, int radius) {
Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
final RenderScript rs = RenderScript.create(context);
final Allocation input =
Allocation.createFromBitmap(
rs, sentBitmap, Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
final Allocation output = Allocation.createTyped(rs, input.getType());
final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setRadius(radius);
script.setInput(input);
script.forEach(output);
output.copyTo(bitmap);
return bitmap;
}
protected boolean prepare() {
final int width = mBlurredView.getWidth();
final int height = mBlurredView.getHeight();
if (mBlurringCanvas == null
|| mDownSampleFactorChanged
|| mBlurredViewWidth != width
|| mBlurredViewHeight != height) {
mDownSampleFactorChanged = false;
mBlurredViewWidth = width;
mBlurredViewHeight = height;
int scaledWidth = width / mDownSampleFactor;
int scaledHeight = height / mDownSampleFactor;
// The following manipulation is to avoid some RenderScript artifacts at the edge.
scaledWidth = scaledWidth - scaledWidth % 4 + 4;
scaledHeight = scaledHeight - scaledHeight % 4 + 4;
if (mBlurredBitmap == null
|| mBlurredBitmap.getWidth() != scaledWidth
|| mBlurredBitmap.getHeight() != scaledHeight) {
mBitmapToBlur = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
if (mBitmapToBlur == null) {
return false;
}
mBlurredBitmap = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
if (mBlurredBitmap == null) {
return false;
}
}
mBlurringCanvas = new Canvas(mBitmapToBlur);
mBlurringCanvas.scale(1f / mDownSampleFactor, 1f / mDownSampleFactor);
mBlurInput =
Allocation.createFromBitmap(
mRenderScript,
mBitmapToBlur,
Allocation.MipmapControl.MIPMAP_NONE,
Allocation.USAGE_SCRIPT);
mBlurOutput = Allocation.createTyped(mRenderScript, mBlurInput.getType());
}
return true;
}
