RenderScript for Android

RenderScript + Blur

1. RenderScript + Blur Wasabeef
2. About Me @wasabeef_jp CyberAgent, Inc.
3. RenderScript?
4. RenderScript? ɾAPI Level 11 (Support Library v8) ɾUsing C99 lang (RenderScript Kernel) ɾUsing Java API ɾImage Processing ɾBlur … etc
5. RenderScript Kernel? blur.rs LLVM RS CC blur.bc ScriptC_blur .java ScriptField_point .java
6. RenderScript Intrinsics ɾScriptIntrinsicConvolve3x3 ɾScriptIntrinsicConvolve5x5 ɾScriptIntrinsicBlur ɾScriptIntrinsicYuvToRGB ɾScriptIntrinsicColorMatrix ɾScriptIntrinsicBlend ɾScriptIntrinsicLUT ɾScriptIntrinsic3DLUT
7. RenderScript Settings
8. Gradle android { compileSdkVersion 23 buildToolsVersion “23.0.1” defaultConfig { minSdkVersion 23 targetSdkVersion 23 renderscriptTargetApi 23 renderscriptSupportModeEnabled true } }
9. Gradle android { compileSdkVersion 23 buildToolsVersion “23.0.1” defaultConfig { minSdkVersion 23 targetSdkVersion 23 renderscriptTargetApi 23 renderscriptSupportModeEnabled true } }
10. Blur?
11. Blur
12. Algorithms ɾRS Gaussian Fast (ScriptIntrinsicBlur) ɾRS Box, Gaussian 5x5 (ScriptIntrinsicConvolve5x5) ɾStack Blur ɾGaussian Fast Blur ɾBox Blur
13. Gaussian Blur (Java) public static void blur(Bitmap bmp, int radius) {
 int w = bmp.getWidth();
 int h = bmp.getHeight();
 int[] pix = new int[w * h];
 bmp.getPixels(pix, 0, w, 0, 0, w, h);
 
 for (int r = radius; r >= 1; r /= 2) {
 for (int i = r; i < h - r; i++) {
 for (int j = r; j < w - r; j++) {
 int tl = pix[(i - r) * w + j - r];
 int tr = pix[(i - r) * w + j + r];
 int tc = pix[(i - r) * w + j];
 int bl = pix[(i + r) * w + j - r];
 int br = pix[(i + r) * w + j + r];
 int bc = pix[(i + r) * w + j];
 int cl = pix[i * w + j - r];
 int cr = pix[i * w + j + r];
 
 pix[(i * w) + j] = 0xFF000000 |
 (((tl & 0xFF) + (tr & 0xFF) + (tc & 0xFF) + (bl & 0xFF) + (br & 0xFF) + (bc & 0xFF)
 + (cl & 0xFF) + (cr & 0xFF)) >> 3) & 0xFF |
 (((tl & 0xFF00) + (tr & 0xFF00) + (tc & 0xFF00) + (bl & 0xFF00) + (br & 0xFF00) + (bc
 & 0xFF00) + (cl & 0xFF00) + (cr & 0xFF00)) >> 3) & 0xFF00 |
 (((tl & 0xFF0000) + (tr & 0xFF0000) + (tc & 0xFF0000) + (bl & 0xFF0000) + (br
 & 0xFF0000) + (bc & 0xFF0000) + (cl & 0xFF0000) + (cr & 0xFF0000)) >> 3)
 & 0xFF0000;
 }
 }
 }
 bmp.setPixels(pix, 0, w, 0, 0, w, h);
 }
14. RS Gaussian Blur (Java) public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
15. RenderScript public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
16. Allocation public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
17. ScriptIntrinsicBlur public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
18. RenderScript Intrinsics ɾScriptIntrinsicConvolve3x3 ɾScriptIntrinsicConvolve5x5 ɾScriptIntrinsicBlur ɾScriptIntrinsicYuvToRGB ɾScriptIntrinsicColorMatrix ɾScriptIntrinsicBlend ɾScriptIntrinsicLUT ɾScriptIntrinsic3DLUT
19. Element ɾRoughly equivalent to a C type ɾfloat ɾfloat4 ɾunsigned 32-bit int ɾsigned 8-bit int
20. ScriptIntrinsicBlur::setRadius public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
21. ScriptIntrinsicBlur::setInput public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
22. ScriptIntrinsicBlur::forEach public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
23. Allocation::copyTo public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
24. RenderScript::destroy public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
25. RS Gaussian Blur public static void blur(Bitmap src, int radius) { RenderScript rs = RenderScript.create(context);
 Allocation input = Allocation.createFromBitmap(rs, src); Allocation output = Allocation.createTyped(rs, input.getType()); ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); script.setRadius(radius); script.setInput(input); script.forEach(output); output.copyTo(src);
 rs.destroy(); }
26. github.com/wasabeef Blurry Glide Transformations Picasso Transformations Fresco Processors
27. Thanks.