android 高斯模糊
16lz
2021-01-26
BaseRender
import android.graphics.Bitmap;public interface BaseRender { public abstract void blur(float radius, Bitmap in, Bitmap out); public abstract void destory();}Blur
public class Blur { private static final float BITMAP_SCALE_NOMAL = 0.8f; private static final float BLUR_RADIUS_NOMAL = 12.0f; public static final float BITMAP_SCALE_FAST = 0.2f; public static final float BLUR_RADIUS_FAST = 5.0f; private boolean USE_JNI = false; private BaseRender mRender; private static Blur instance; public static Blur getInstance(Context context) { if(instance == null) instance = new Blur(context); return instance; } private Blur(Context context) { mRender = new ScriptIntrinsicBlurRender(context); } public Bitmap blur(Bitmap image, boolean fast) { float scale = BITMAP_SCALE_NOMAL; float radius = BLUR_RADIUS_NOMAL; if (fast) { scale = BITMAP_SCALE_FAST; radius = BLUR_RADIUS_FAST; } int width = Math.round(image.getWidth() * scale); int height = Math.round(image.getHeight() * scale); Bitmap bitmap = Bitmap.createScaledBitmap(image, width, height, true); Bitmap outputBitmap = bitmap.copy(bitmap.getConfig(), true); mRender.blur(radius, bitmap, outputBitmap); bitmap.recycle(); return outputBitmap; } public void destory() { if (mRender != null) { mRender.destory(); } } }RSRender
public abstract class RSRender implements BaseRender { protected RenderScript rs; public RSRender(Context ctx) { rs = RenderScript.create(ctx); } @Override public void blur(float radius, Bitmap in, Bitmap out) { Allocation tmpIn = Allocation.createFromBitmap(rs, in); Allocation tmpOut = Allocation.createFromBitmap(rs, out); blur(radius, tmpIn, tmpOut); tmpOut.copyTo(out); tmpIn.destroy(); tmpOut.destroy(); } public abstract void blur(float radius, Allocation tmpIn, Allocation tmpOut); @Override public void destory() { if (rs != null) rs.destroy(); }}ScriptIntrinsicBlurRender
public class ScriptIntrinsicBlurRender extends RSRender { private ScriptIntrinsicBlur theIntrinsic; public ScriptIntrinsicBlurRender(Context context) { super(context); theIntrinsic = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); } @Override public void blur(float radius, Allocation tmpIn, Allocation tmpOut) { theIntrinsic.setRadius(radius); theIntrinsic.setInput(tmpIn); theIntrinsic.forEach(tmpOut); } @Override public void destory() { super.destory(); theIntrinsic.destroy(); }}调用方式
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