diff --git a/app/src/main/java/com/kabouzeid/gramophone/helper/StackBlur.java b/app/src/main/java/com/kabouzeid/gramophone/helper/StackBlur.java
new file mode 100644
index 00000000..535d2a7a
--- /dev/null
+++ b/app/src/main/java/com/kabouzeid/gramophone/helper/StackBlur.java
@@ -0,0 +1,333 @@
+package com.kabouzeid.gramophone.helper;
+
+import android.graphics.Bitmap;
+
+import java.util.ArrayList;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * Blur using Java code.
+ *
+ * This is a compromise between Gaussian Blur and Box blur
+ * It creates much better looking blurs than Box Blur, but is
+ * 7x faster than my Gaussian Blur implementation.
+ *
+ * I called it Stack Blur because this describes best how this
+ * filter works internally: it creates a kind of moving stack
+ * of colors whilst scanning through the image. Thereby it
+ * just has to add one new block of color to the right side
+ * of the stack and remove the leftmost color. The remaining
+ * colors on the topmost layer of the stack are either added on
+ * or reduced by one, depending on if they are on the right or
+ * on the left side of the stack.
+ *
+ * @author Enrique López Mañas
+ * http://www.neo-tech.es
+ *
+ * Author of the original algorithm: Mario Klingemann
+ *
+ * Based heavily on http://vitiy.info/Code/stackblur.cpp
+ * See http://vitiy.info/stackblur-algorithm-multi-threaded-blur-for-cpp/
+ * @copyright: Enrique López Mañas
+ * @license: Apache License 2.0
+ */
+public class StackBlur {
+
+ static final int EXECUTOR_THREADS = Runtime.getRuntime().availableProcessors();
+ static final ExecutorService EXECUTOR = Executors.newFixedThreadPool(EXECUTOR_THREADS);
+
+ private static final short[] stackblur_mul = {
+ 512, 512, 456, 512, 328, 456, 335, 512, 405, 328, 271, 456, 388, 335, 292, 512,
+ 454, 405, 364, 328, 298, 271, 496, 456, 420, 388, 360, 335, 312, 292, 273, 512,
+ 482, 454, 428, 405, 383, 364, 345, 328, 312, 298, 284, 271, 259, 496, 475, 456,
+ 437, 420, 404, 388, 374, 360, 347, 335, 323, 312, 302, 292, 282, 273, 265, 512,
+ 497, 482, 468, 454, 441, 428, 417, 405, 394, 383, 373, 364, 354, 345, 337, 328,
+ 320, 312, 305, 298, 291, 284, 278, 271, 265, 259, 507, 496, 485, 475, 465, 456,
+ 446, 437, 428, 420, 412, 404, 396, 388, 381, 374, 367, 360, 354, 347, 341, 335,
+ 329, 323, 318, 312, 307, 302, 297, 292, 287, 282, 278, 273, 269, 265, 261, 512,
+ 505, 497, 489, 482, 475, 468, 461, 454, 447, 441, 435, 428, 422, 417, 411, 405,
+ 399, 394, 389, 383, 378, 373, 368, 364, 359, 354, 350, 345, 341, 337, 332, 328,
+ 324, 320, 316, 312, 309, 305, 301, 298, 294, 291, 287, 284, 281, 278, 274, 271,
+ 268, 265, 262, 259, 257, 507, 501, 496, 491, 485, 480, 475, 470, 465, 460, 456,
+ 451, 446, 442, 437, 433, 428, 424, 420, 416, 412, 408, 404, 400, 396, 392, 388,
+ 385, 381, 377, 374, 370, 367, 363, 360, 357, 354, 350, 347, 344, 341, 338, 335,
+ 332, 329, 326, 323, 320, 318, 315, 312, 310, 307, 304, 302, 299, 297, 294, 292,
+ 289, 287, 285, 282, 280, 278, 275, 273, 271, 269, 267, 265, 263, 261, 259
+ };
+
+ private static final byte[] stackblur_shr = {
+ 9, 11, 12, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17,
+ 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23,
+ 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
+ 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
+ 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
+ 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24
+ };
+
+ public static Bitmap blur(Bitmap original, float radius) {
+ int w = original.getWidth();
+ int h = original.getHeight();
+ int[] currentPixels = new int[w * h];
+ original.getPixels(currentPixels, 0, w, 0, 0, w, h);
+ int cores = EXECUTOR_THREADS;
+
+ ArrayList horizontal = new ArrayList(cores);
+ ArrayList vertical = new ArrayList(cores);
+ for (int i = 0; i < cores; i++) {
+ horizontal.add(new BlurTask(currentPixels, w, h, (int) radius, cores, i, 1));
+ vertical.add(new BlurTask(currentPixels, w, h, (int) radius, cores, i, 2));
+ }
+
+ try {
+ EXECUTOR.invokeAll(horizontal);
+ } catch (InterruptedException e) {
+ return null;
+ }
+
+ try {
+ EXECUTOR.invokeAll(vertical);
+ } catch (InterruptedException e) {
+ return null;
+ }
+
+ return Bitmap.createBitmap(currentPixels, w, h, Bitmap.Config.ARGB_8888);
+ }
+
+ private static void blurIteration(int[] src, int w, int h, int radius, int cores, int core, int step) {
+ int x, y, xp, yp, i;
+ int sp;
+ int stack_start;
+ int stack_i;
+
+ int src_i;
+ int dst_i;
+
+ long sum_r, sum_g, sum_b,
+ sum_in_r, sum_in_g, sum_in_b,
+ sum_out_r, sum_out_g, sum_out_b;
+
+ int wm = w - 1;
+ int hm = h - 1;
+ int div = (radius * 2) + 1;
+ int mul_sum = stackblur_mul[radius];
+ byte shr_sum = stackblur_shr[radius];
+ int[] stack = new int[div];
+
+ if (step == 1) {
+ int minY = core * h / cores;
+ int maxY = (core + 1) * h / cores;
+
+ for (y = minY; y < maxY; y++) {
+ sum_r = sum_g = sum_b =
+ sum_in_r = sum_in_g = sum_in_b =
+ sum_out_r = sum_out_g = sum_out_b = 0;
+
+ src_i = w * y; // start of line (0,y)
+
+ for (i = 0; i <= radius; i++) {
+ stack_i = i;
+ stack[stack_i] = src[src_i];
+ sum_r += ((src[src_i] >>> 16) & 0xff) * (i + 1);
+ sum_g += ((src[src_i] >>> 8) & 0xff) * (i + 1);
+ sum_b += (src[src_i] & 0xff) * (i + 1);
+ sum_out_r += ((src[src_i] >>> 16) & 0xff);
+ sum_out_g += ((src[src_i] >>> 8) & 0xff);
+ sum_out_b += (src[src_i] & 0xff);
+ }
+
+
+ for (i = 1; i <= radius; i++) {
+ if (i <= wm) src_i += 1;
+ stack_i = i + radius;
+ stack[stack_i] = src[src_i];
+ sum_r += ((src[src_i] >>> 16) & 0xff) * (radius + 1 - i);
+ sum_g += ((src[src_i] >>> 8) & 0xff) * (radius + 1 - i);
+ sum_b += (src[src_i] & 0xff) * (radius + 1 - i);
+ sum_in_r += ((src[src_i] >>> 16) & 0xff);
+ sum_in_g += ((src[src_i] >>> 8) & 0xff);
+ sum_in_b += (src[src_i] & 0xff);
+ }
+
+
+ sp = radius;
+ xp = radius;
+ if (xp > wm) xp = wm;
+ src_i = xp + y * w; // img.pix_ptr(xp, y);
+ dst_i = y * w; // img.pix_ptr(0, y);
+ for (x = 0; x < w; x++) {
+ src[dst_i] = (int)
+ ((src[dst_i] & 0xff000000) |
+ ((((sum_r * mul_sum) >>> shr_sum) & 0xff) << 16) |
+ ((((sum_g * mul_sum) >>> shr_sum) & 0xff) << 8) |
+ ((((sum_b * mul_sum) >>> shr_sum) & 0xff)));
+ dst_i += 1;
+
+ sum_r -= sum_out_r;
+ sum_g -= sum_out_g;
+ sum_b -= sum_out_b;
+
+ stack_start = sp + div - radius;
+ if (stack_start >= div) stack_start -= div;
+ stack_i = stack_start;
+
+ sum_out_r -= ((stack[stack_i] >>> 16) & 0xff);
+ sum_out_g -= ((stack[stack_i] >>> 8) & 0xff);
+ sum_out_b -= (stack[stack_i] & 0xff);
+
+ if (xp < wm) {
+ src_i += 1;
+ ++xp;
+ }
+
+ stack[stack_i] = src[src_i];
+
+ sum_in_r += ((src[src_i] >>> 16) & 0xff);
+ sum_in_g += ((src[src_i] >>> 8) & 0xff);
+ sum_in_b += (src[src_i] & 0xff);
+ sum_r += sum_in_r;
+ sum_g += sum_in_g;
+ sum_b += sum_in_b;
+
+ ++sp;
+ if (sp >= div) sp = 0;
+ stack_i = sp;
+
+ sum_out_r += ((stack[stack_i] >>> 16) & 0xff);
+ sum_out_g += ((stack[stack_i] >>> 8) & 0xff);
+ sum_out_b += (stack[stack_i] & 0xff);
+ sum_in_r -= ((stack[stack_i] >>> 16) & 0xff);
+ sum_in_g -= ((stack[stack_i] >>> 8) & 0xff);
+ sum_in_b -= (stack[stack_i] & 0xff);
+ }
+
+ }
+ }
+
+ // step 2
+ else if (step == 2) {
+ int minX = core * w / cores;
+ int maxX = (core + 1) * w / cores;
+
+ for (x = minX; x < maxX; x++) {
+ sum_r = sum_g = sum_b =
+ sum_in_r = sum_in_g = sum_in_b =
+ sum_out_r = sum_out_g = sum_out_b = 0;
+
+ src_i = x; // x,0
+ for (i = 0; i <= radius; i++) {
+ stack_i = i;
+ stack[stack_i] = src[src_i];
+ sum_r += ((src[src_i] >>> 16) & 0xff) * (i + 1);
+ sum_g += ((src[src_i] >>> 8) & 0xff) * (i + 1);
+ sum_b += (src[src_i] & 0xff) * (i + 1);
+ sum_out_r += ((src[src_i] >>> 16) & 0xff);
+ sum_out_g += ((src[src_i] >>> 8) & 0xff);
+ sum_out_b += (src[src_i] & 0xff);
+ }
+ for (i = 1; i <= radius; i++) {
+ if (i <= hm) src_i += w; // +stride
+
+ stack_i = i + radius;
+ stack[stack_i] = src[src_i];
+ sum_r += ((src[src_i] >>> 16) & 0xff) * (radius + 1 - i);
+ sum_g += ((src[src_i] >>> 8) & 0xff) * (radius + 1 - i);
+ sum_b += (src[src_i] & 0xff) * (radius + 1 - i);
+ sum_in_r += ((src[src_i] >>> 16) & 0xff);
+ sum_in_g += ((src[src_i] >>> 8) & 0xff);
+ sum_in_b += (src[src_i] & 0xff);
+ }
+
+ sp = radius;
+ yp = radius;
+ if (yp > hm) yp = hm;
+ src_i = x + yp * w; // img.pix_ptr(x, yp);
+ dst_i = x; // img.pix_ptr(x, 0);
+ for (y = 0; y < h; y++) {
+ src[dst_i] = (int)
+ ((src[dst_i] & 0xff000000) |
+ ((((sum_r * mul_sum) >>> shr_sum) & 0xff) << 16) |
+ ((((sum_g * mul_sum) >>> shr_sum) & 0xff) << 8) |
+ ((((sum_b * mul_sum) >>> shr_sum) & 0xff)));
+ dst_i += w;
+
+ sum_r -= sum_out_r;
+ sum_g -= sum_out_g;
+ sum_b -= sum_out_b;
+
+ stack_start = sp + div - radius;
+ if (stack_start >= div) stack_start -= div;
+ stack_i = stack_start;
+
+ sum_out_r -= ((stack[stack_i] >>> 16) & 0xff);
+ sum_out_g -= ((stack[stack_i] >>> 8) & 0xff);
+ sum_out_b -= (stack[stack_i] & 0xff);
+
+ if (yp < hm) {
+ src_i += w; // stride
+ ++yp;
+ }
+
+ stack[stack_i] = src[src_i];
+
+ sum_in_r += ((src[src_i] >>> 16) & 0xff);
+ sum_in_g += ((src[src_i] >>> 8) & 0xff);
+ sum_in_b += (src[src_i] & 0xff);
+ sum_r += sum_in_r;
+ sum_g += sum_in_g;
+ sum_b += sum_in_b;
+
+ ++sp;
+ if (sp >= div) sp = 0;
+ stack_i = sp;
+
+ sum_out_r += ((stack[stack_i] >>> 16) & 0xff);
+ sum_out_g += ((stack[stack_i] >>> 8) & 0xff);
+ sum_out_b += (stack[stack_i] & 0xff);
+ sum_in_r -= ((stack[stack_i] >>> 16) & 0xff);
+ sum_in_g -= ((stack[stack_i] >>> 8) & 0xff);
+ sum_in_b -= (stack[stack_i] & 0xff);
+ }
+ }
+ }
+
+ }
+
+ private static class BlurTask implements Callable {
+ private final int[] _src;
+ private final int _w;
+ private final int _h;
+ private final int _radius;
+ private final int _totalCores;
+ private final int _coreIndex;
+ private final int _round;
+
+ public BlurTask(int[] src, int w, int h, int radius, int totalCores, int coreIndex, int round) {
+ _src = src;
+ _w = w;
+ _h = h;
+ _radius = radius;
+ _totalCores = totalCores;
+ _coreIndex = coreIndex;
+ _round = round;
+ }
+
+ @Override
+ public Void call() throws Exception {
+ blurIteration(_src, _w, _h, _radius, _totalCores, _coreIndex, _round);
+ return null;
+ }
+
+ }
+}
diff --git a/app/src/main/java/com/kabouzeid/gramophone/imageloader/BlurProcessor.java b/app/src/main/java/com/kabouzeid/gramophone/imageloader/BlurProcessor.java
index 40c4ee6e..8034bed1 100644
--- a/app/src/main/java/com/kabouzeid/gramophone/imageloader/BlurProcessor.java
+++ b/app/src/main/java/com/kabouzeid/gramophone/imageloader/BlurProcessor.java
@@ -8,9 +8,13 @@ import android.support.annotation.FloatRange;
import android.support.annotation.NonNull;
import android.support.v8.renderscript.Allocation;
import android.support.v8.renderscript.Element;
+import android.support.v8.renderscript.RSRuntimeException;
import android.support.v8.renderscript.RenderScript;
import android.support.v8.renderscript.ScriptIntrinsicBlur;
+import com.kabouzeid.gramophone.BuildConfig;
+import com.kabouzeid.gramophone.helper.StackBlur;
+import com.kabouzeid.gramophone.misc.LagTracker;
import com.kabouzeid.gramophone.util.ImageUtil;
import com.nostra13.universalimageloader.core.process.BitmapProcessor;
@@ -53,20 +57,29 @@ public class BlurProcessor implements BitmapProcessor {
paint.setFlags(Paint.FILTER_BITMAP_FLAG);
canvas.drawBitmap(bitmap, 0, 0, paint);
- final RenderScript rs = RenderScript.create(context.getApplicationContext());
- final Allocation input = Allocation.createFromBitmap(rs, out, 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));
+ try {
+ final RenderScript rs = RenderScript.create(context.getApplicationContext());
+ final Allocation input = Allocation.createFromBitmap(rs, out, 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(blurRadius);
- script.setInput(input);
- script.forEach(output);
+ script.setRadius(blurRadius);
+ script.setInput(input);
+ script.forEach(output);
- output.copyTo(out);
+ output.copyTo(out);
- rs.destroy();
+ rs.destroy();
+ LagTracker.get().end("BLUR RENDERSCRIPT");
- return out;
+ return out;
+
+ } catch (RSRuntimeException e) {
+ // on some devices RenderScript.create() throws: android.support.v8.renderscript.RSRuntimeException: Error loading libRSSupport library
+ if (BuildConfig.DEBUG) e.printStackTrace();
+
+ return StackBlur.blur(out, blurRadius);
+ }
}
public static class Builder {