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Shrink bitmap before blur,then zoom bitmap after blured #25

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Shrink bitmap before blur,then zoom bitmap after blured #25

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38b03be
Shrink bitmap before blur,then zoom bitmap after blured
Dec 18, 2016
ee639e5
Update Blur.java
RosesJack Dec 18, 2016
0e330b2
Correct the error
RosesJack Dec 19, 2016
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19 changes: 16 additions & 3 deletions library/src/main/java/com/daimajia/androidviewhover/tools/Blur.java
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Original file line number Diff line number Diff line change
@@ -1,6 +1,8 @@
package com.daimajia.androidviewhover.tools;

import android.graphics.Bitmap;
import android.content.Context;
import android.graphics.Matrix;
import android.support.v8.renderscript.Allocation;
import android.support.v8.renderscript.Element;
import android.support.v8.renderscript.RenderScript;
Expand All @@ -10,12 +12,15 @@
public class Blur {

private static final int DEFAULT_BLUR_RADIUS = 10;
private static final float DEFAULT_SCALE = 2;

public static Bitmap apply(Context context, Bitmap sentBitmap) {
return apply(context, sentBitmap, DEFAULT_BLUR_RADIUS);
}

public static Bitmap apply(Context context, Bitmap sentBitmap, int radius) {
// shrink half
sentBitmap = scaleBitmap(sentBitmap, 1 / DEFAULT_SCALE);
final 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);
Expand All @@ -26,13 +31,21 @@ public static Bitmap apply(Context context, Bitmap sentBitmap, int radius) {
script.setInput(input);
script.forEach(output);
output.copyTo(bitmap);

//zoom bitmap
final Bitmap zoomBitmap = scaleBitmap(bitmap, DEFAULT_SCALE);
bitmap.recycle();
sentBitmap.recycle();
rs.destroy();
input.destroy();
output.destroy();
script.destroy();

return bitmap;
return zoomBitmap;
}

public static Bitmap scaleBitmap(Bitmap oldBitmap, float scale) {
Matrix matrix = new Matrix();
matrix.postScale(scale, scale);
return Bitmap.createBitmap(oldBitmap, 0, 0, oldBitmap.getWidth(), oldBitmap.getHeight(), matrix, true);
}
}
}