diff --git a/app/src/main/rs/blur.rsh b/app/src/main/rs/blur.rsh
index b7e1daa..8e6f6da 100644
--- a/app/src/main/rs/blur.rsh
+++ b/app/src/main/rs/blur.rsh
@@ -18,6 +18,7 @@ limitations under the License.
 #define BLUR_RSH
 
 #include "exports.rsh"
+#include "blur_generated.rsh"
 
 void incr_blur()
 {
@@ -29,344 +30,4 @@ void decr_blur()
     blur_power = blur_power >= 0 ? blur_power - 1 : blur_power;
 }
 
-/* used the following code generator:
-#include <math.h>
-#include <stdio.h>
-
-double gauss(double x, double radius)
-{
-	double sigma = radius / 3.0;
-	return radius ? exp(- x * x / (2.0 * sigma * sigma)) / sqrt(2.0 * M_PI * sigma * sigma) : 1.0;
-}
-void emit(int radius)
-{
-	printf("\t\tif (i < %d || (buffer_length - %d) <= i)\n\t\t\treturn 0;\n", radius, radius);
-	int sum = 0;
-	for (int i = -radius; i <= radius; ++i)
-		sum += 16384 * gauss(i, radius);
-	int factor = (16384 * 16384) / (sum + 1);
-	for (int i = -radius; i <= radius; ++i)
-		printf("\t\t%s%d * value_buffer[i%s%d]%s\n",
-			i != -radius ? "\t" : "return (",
-			(int)(factor * gauss(i, radius)),
-			i < 0 ? "" : "+",
-			i,
-			i != radius ? " +" : ") >> 14;"
-		);
-}
-int main()
-{
-	printf("static uchar value_blur(int i)\n{\n\tswitch (blur_power) {\n");
-	for (int i = 0; i < 7; ++i) {
-		printf("\tcase %d:\n", i);
-		emit((1 << i) | 1);
-	}
-	printf("\tdefault:\n\t\treturn value_buffer[i];\n\t}\n\treturn 0;\n}\n");
-	return 0;
-}
-*/
-
-static uchar value_blur(int i)
-{
-	switch (blur_power) {
-	case 0:
-		if (i < 1 || (buffer_length - 1) <= i)
-			return 0;
-		return (178 * value_buffer[i-1] +
-			16027 * value_buffer[i+0] +
-			178 * value_buffer[i+1]) >> 14;
-	case 1:
-		if (i < 3 || (buffer_length - 3) <= i)
-			return 0;
-		return (72 * value_buffer[i-3] +
-			884 * value_buffer[i-2] +
-			3966 * value_buffer[i-1] +
-			6539 * value_buffer[i+0] +
-			3966 * value_buffer[i+1] +
-			884 * value_buffer[i+2] +
-			72 * value_buffer[i+3]) >> 14;
-	case 2:
-		if (i < 5 || (buffer_length - 5) <= i)
-			return 0;
-		return (43 * value_buffer[i-5] +
-			220 * value_buffer[i-4] +
-			776 * value_buffer[i-3] +
-			1911 * value_buffer[i-2] +
-			3279 * value_buffer[i-1] +
-			3926 * value_buffer[i+0] +
-			3279 * value_buffer[i+1] +
-			1911 * value_buffer[i+2] +
-			776 * value_buffer[i+3] +
-			220 * value_buffer[i+4] +
-			43 * value_buffer[i+5]) >> 14;
-	case 3:
-		if (i < 9 || (buffer_length - 9) <= i)
-			return 0;
-		return (24 * value_buffer[i-9] +
-			62 * value_buffer[i-8] +
-			143 * value_buffer[i-7] +
-			295 * value_buffer[i-6] +
-			544 * value_buffer[i-5] +
-			897 * value_buffer[i-4] +
-			1323 * value_buffer[i-3] +
-			1747 * value_buffer[i-2] +
-			2064 * value_buffer[i-1] +
-			2182 * value_buffer[i+0] +
-			2064 * value_buffer[i+1] +
-			1747 * value_buffer[i+2] +
-			1323 * value_buffer[i+3] +
-			897 * value_buffer[i+4] +
-			544 * value_buffer[i+5] +
-			295 * value_buffer[i+6] +
-			143 * value_buffer[i+7] +
-			62 * value_buffer[i+8] +
-			24 * value_buffer[i+9]) >> 14;
-	case 4:
-		if (i < 17 || (buffer_length - 17) <= i)
-			return 0;
-		return (12 * value_buffer[i-17] +
-			21 * value_buffer[i-16] +
-			34 * value_buffer[i-15] +
-			54 * value_buffer[i-14] +
-			83 * value_buffer[i-13] +
-			122 * value_buffer[i-12] +
-			175 * value_buffer[i-11] +
-			243 * value_buffer[i-10] +
-			327 * value_buffer[i-9] +
-			427 * value_buffer[i-8] +
-			539 * value_buffer[i-7] +
-			660 * value_buffer[i-6] +
-			783 * value_buffer[i-5] +
-			901 * value_buffer[i-4] +
-			1005 * value_buffer[i-3] +
-			1087 * value_buffer[i-2] +
-			1139 * value_buffer[i-1] +
-			1156 * value_buffer[i+0] +
-			1139 * value_buffer[i+1] +
-			1087 * value_buffer[i+2] +
-			1005 * value_buffer[i+3] +
-			901 * value_buffer[i+4] +
-			783 * value_buffer[i+5] +
-			660 * value_buffer[i+6] +
-			539 * value_buffer[i+7] +
-			427 * value_buffer[i+8] +
-			327 * value_buffer[i+9] +
-			243 * value_buffer[i+10] +
-			175 * value_buffer[i+11] +
-			122 * value_buffer[i+12] +
-			83 * value_buffer[i+13] +
-			54 * value_buffer[i+14] +
-			34 * value_buffer[i+15] +
-			21 * value_buffer[i+16] +
-			12 * value_buffer[i+17]) >> 14;
-	case 5:
-		if (i < 33 || (buffer_length - 33) <= i)
-			return 0;
-		return (6 * value_buffer[i-33] +
-			8 * value_buffer[i-32] +
-			11 * value_buffer[i-31] +
-			14 * value_buffer[i-30] +
-			18 * value_buffer[i-29] +
-			23 * value_buffer[i-28] +
-			29 * value_buffer[i-27] +
-			36 * value_buffer[i-26] +
-			45 * value_buffer[i-25] +
-			55 * value_buffer[i-24] +
-			67 * value_buffer[i-23] +
-			80 * value_buffer[i-22] +
-			96 * value_buffer[i-21] +
-			114 * value_buffer[i-20] +
-			134 * value_buffer[i-19] +
-			156 * value_buffer[i-18] +
-			180 * value_buffer[i-17] +
-			207 * value_buffer[i-16] +
-			235 * value_buffer[i-15] +
-			265 * value_buffer[i-14] +
-			296 * value_buffer[i-13] +
-			329 * value_buffer[i-12] +
-			361 * value_buffer[i-11] +
-			394 * value_buffer[i-10] +
-			426 * value_buffer[i-9] +
-			457 * value_buffer[i-8] +
-			487 * value_buffer[i-7] +
-			514 * value_buffer[i-6] +
-			538 * value_buffer[i-5] +
-			558 * value_buffer[i-4] +
-			574 * value_buffer[i-3] +
-			586 * value_buffer[i-2] +
-			594 * value_buffer[i-1] +
-			596 * value_buffer[i+0] +
-			594 * value_buffer[i+1] +
-			586 * value_buffer[i+2] +
-			574 * value_buffer[i+3] +
-			558 * value_buffer[i+4] +
-			538 * value_buffer[i+5] +
-			514 * value_buffer[i+6] +
-			487 * value_buffer[i+7] +
-			457 * value_buffer[i+8] +
-			426 * value_buffer[i+9] +
-			394 * value_buffer[i+10] +
-			361 * value_buffer[i+11] +
-			329 * value_buffer[i+12] +
-			296 * value_buffer[i+13] +
-			265 * value_buffer[i+14] +
-			235 * value_buffer[i+15] +
-			207 * value_buffer[i+16] +
-			180 * value_buffer[i+17] +
-			156 * value_buffer[i+18] +
-			134 * value_buffer[i+19] +
-			114 * value_buffer[i+20] +
-			96 * value_buffer[i+21] +
-			80 * value_buffer[i+22] +
-			67 * value_buffer[i+23] +
-			55 * value_buffer[i+24] +
-			45 * value_buffer[i+25] +
-			36 * value_buffer[i+26] +
-			29 * value_buffer[i+27] +
-			23 * value_buffer[i+28] +
-			18 * value_buffer[i+29] +
-			14 * value_buffer[i+30] +
-			11 * value_buffer[i+31] +
-			8 * value_buffer[i+32] +
-			6 * value_buffer[i+33]) >> 14;
-	case 6:
-		if (i < 65 || (buffer_length - 65) <= i)
-			return 0;
-		return (3 * value_buffer[i-65] +
-			3 * value_buffer[i-64] +
-			4 * value_buffer[i-63] +
-			5 * value_buffer[i-62] +
-			5 * value_buffer[i-61] +
-			6 * value_buffer[i-60] +
-			7 * value_buffer[i-59] +
-			8 * value_buffer[i-58] +
-			9 * value_buffer[i-57] +
-			10 * value_buffer[i-56] +
-			12 * value_buffer[i-55] +
-			13 * value_buffer[i-54] +
-			15 * value_buffer[i-53] +
-			17 * value_buffer[i-52] +
-			19 * value_buffer[i-51] +
-			21 * value_buffer[i-50] +
-			23 * value_buffer[i-49] +
-			26 * value_buffer[i-48] +
-			28 * value_buffer[i-47] +
-			31 * value_buffer[i-46] +
-			35 * value_buffer[i-45] +
-			38 * value_buffer[i-44] +
-			42 * value_buffer[i-43] +
-			46 * value_buffer[i-42] +
-			50 * value_buffer[i-41] +
-			55 * value_buffer[i-40] +
-			60 * value_buffer[i-39] +
-			65 * value_buffer[i-38] +
-			70 * value_buffer[i-37] +
-			76 * value_buffer[i-36] +
-			82 * value_buffer[i-35] +
-			88 * value_buffer[i-34] +
-			95 * value_buffer[i-33] +
-			102 * value_buffer[i-32] +
-			109 * value_buffer[i-31] +
-			116 * value_buffer[i-30] +
-			123 * value_buffer[i-29] +
-			131 * value_buffer[i-28] +
-			139 * value_buffer[i-27] +
-			147 * value_buffer[i-26] +
-			156 * value_buffer[i-25] +
-			164 * value_buffer[i-24] +
-			172 * value_buffer[i-23] +
-			181 * value_buffer[i-22] +
-			189 * value_buffer[i-21] +
-			198 * value_buffer[i-20] +
-			206 * value_buffer[i-19] +
-			215 * value_buffer[i-18] +
-			223 * value_buffer[i-17] +
-			231 * value_buffer[i-16] +
-			238 * value_buffer[i-15] +
-			246 * value_buffer[i-14] +
-			253 * value_buffer[i-13] +
-			260 * value_buffer[i-12] +
-			266 * value_buffer[i-11] +
-			272 * value_buffer[i-10] +
-			278 * value_buffer[i-9] +
-			283 * value_buffer[i-8] +
-			288 * value_buffer[i-7] +
-			292 * value_buffer[i-6] +
-			295 * value_buffer[i-5] +
-			298 * value_buffer[i-4] +
-			300 * value_buffer[i-3] +
-			302 * value_buffer[i-2] +
-			303 * value_buffer[i-1] +
-			303 * value_buffer[i+0] +
-			303 * value_buffer[i+1] +
-			302 * value_buffer[i+2] +
-			300 * value_buffer[i+3] +
-			298 * value_buffer[i+4] +
-			295 * value_buffer[i+5] +
-			292 * value_buffer[i+6] +
-			288 * value_buffer[i+7] +
-			283 * value_buffer[i+8] +
-			278 * value_buffer[i+9] +
-			272 * value_buffer[i+10] +
-			266 * value_buffer[i+11] +
-			260 * value_buffer[i+12] +
-			253 * value_buffer[i+13] +
-			246 * value_buffer[i+14] +
-			238 * value_buffer[i+15] +
-			231 * value_buffer[i+16] +
-			223 * value_buffer[i+17] +
-			215 * value_buffer[i+18] +
-			206 * value_buffer[i+19] +
-			198 * value_buffer[i+20] +
-			189 * value_buffer[i+21] +
-			181 * value_buffer[i+22] +
-			172 * value_buffer[i+23] +
-			164 * value_buffer[i+24] +
-			156 * value_buffer[i+25] +
-			147 * value_buffer[i+26] +
-			139 * value_buffer[i+27] +
-			131 * value_buffer[i+28] +
-			123 * value_buffer[i+29] +
-			116 * value_buffer[i+30] +
-			109 * value_buffer[i+31] +
-			102 * value_buffer[i+32] +
-			95 * value_buffer[i+33] +
-			88 * value_buffer[i+34] +
-			82 * value_buffer[i+35] +
-			76 * value_buffer[i+36] +
-			70 * value_buffer[i+37] +
-			65 * value_buffer[i+38] +
-			60 * value_buffer[i+39] +
-			55 * value_buffer[i+40] +
-			50 * value_buffer[i+41] +
-			46 * value_buffer[i+42] +
-			42 * value_buffer[i+43] +
-			38 * value_buffer[i+44] +
-			35 * value_buffer[i+45] +
-			31 * value_buffer[i+46] +
-			28 * value_buffer[i+47] +
-			26 * value_buffer[i+48] +
-			23 * value_buffer[i+49] +
-			21 * value_buffer[i+50] +
-			19 * value_buffer[i+51] +
-			17 * value_buffer[i+52] +
-			15 * value_buffer[i+53] +
-			13 * value_buffer[i+54] +
-			12 * value_buffer[i+55] +
-			10 * value_buffer[i+56] +
-			9 * value_buffer[i+57] +
-			8 * value_buffer[i+58] +
-			7 * value_buffer[i+59] +
-			6 * value_buffer[i+60] +
-			5 * value_buffer[i+61] +
-			5 * value_buffer[i+62] +
-			4 * value_buffer[i+63] +
-			3 * value_buffer[i+64] +
-			3 * value_buffer[i+65]) >> 14;
-	default:
-		return value_buffer[i];
-	}
-	return 0;
-}
-
 #endif
diff --git a/app/src/main/rs/blur_generated.rsh b/app/src/main/rs/blur_generated.rsh
new file mode 100644
index 0000000..240402a
--- /dev/null
+++ b/app/src/main/rs/blur_generated.rsh
@@ -0,0 +1,303 @@
+/* code generated by 'utils/blur.c' */
+static uchar value_blur(int i)
+{
+	switch (blur_power) {
+	case 0:
+		if (i < 1 || (buffer_length - 1) <= i)
+			return 0;
+		return (178 * value_buffer[i-1] +
+			16027 * value_buffer[i+0] +
+			178 * value_buffer[i+1]) >> 14;
+	case 1:
+		if (i < 3 || (buffer_length - 3) <= i)
+			return 0;
+		return (72 * value_buffer[i-3] +
+			884 * value_buffer[i-2] +
+			3966 * value_buffer[i-1] +
+			6539 * value_buffer[i+0] +
+			3966 * value_buffer[i+1] +
+			884 * value_buffer[i+2] +
+			72 * value_buffer[i+3]) >> 14;
+	case 2:
+		if (i < 5 || (buffer_length - 5) <= i)
+			return 0;
+		return (43 * value_buffer[i-5] +
+			220 * value_buffer[i-4] +
+			776 * value_buffer[i-3] +
+			1911 * value_buffer[i-2] +
+			3279 * value_buffer[i-1] +
+			3926 * value_buffer[i+0] +
+			3279 * value_buffer[i+1] +
+			1911 * value_buffer[i+2] +
+			776 * value_buffer[i+3] +
+			220 * value_buffer[i+4] +
+			43 * value_buffer[i+5]) >> 14;
+	case 3:
+		if (i < 9 || (buffer_length - 9) <= i)
+			return 0;
+		return (24 * value_buffer[i-9] +
+			62 * value_buffer[i-8] +
+			143 * value_buffer[i-7] +
+			295 * value_buffer[i-6] +
+			544 * value_buffer[i-5] +
+			897 * value_buffer[i-4] +
+			1323 * value_buffer[i-3] +
+			1747 * value_buffer[i-2] +
+			2064 * value_buffer[i-1] +
+			2182 * value_buffer[i+0] +
+			2064 * value_buffer[i+1] +
+			1747 * value_buffer[i+2] +
+			1323 * value_buffer[i+3] +
+			897 * value_buffer[i+4] +
+			544 * value_buffer[i+5] +
+			295 * value_buffer[i+6] +
+			143 * value_buffer[i+7] +
+			62 * value_buffer[i+8] +
+			24 * value_buffer[i+9]) >> 14;
+	case 4:
+		if (i < 17 || (buffer_length - 17) <= i)
+			return 0;
+		return (12 * value_buffer[i-17] +
+			21 * value_buffer[i-16] +
+			34 * value_buffer[i-15] +
+			54 * value_buffer[i-14] +
+			83 * value_buffer[i-13] +
+			122 * value_buffer[i-12] +
+			175 * value_buffer[i-11] +
+			243 * value_buffer[i-10] +
+			327 * value_buffer[i-9] +
+			427 * value_buffer[i-8] +
+			539 * value_buffer[i-7] +
+			660 * value_buffer[i-6] +
+			783 * value_buffer[i-5] +
+			901 * value_buffer[i-4] +
+			1005 * value_buffer[i-3] +
+			1087 * value_buffer[i-2] +
+			1139 * value_buffer[i-1] +
+			1156 * value_buffer[i+0] +
+			1139 * value_buffer[i+1] +
+			1087 * value_buffer[i+2] +
+			1005 * value_buffer[i+3] +
+			901 * value_buffer[i+4] +
+			783 * value_buffer[i+5] +
+			660 * value_buffer[i+6] +
+			539 * value_buffer[i+7] +
+			427 * value_buffer[i+8] +
+			327 * value_buffer[i+9] +
+			243 * value_buffer[i+10] +
+			175 * value_buffer[i+11] +
+			122 * value_buffer[i+12] +
+			83 * value_buffer[i+13] +
+			54 * value_buffer[i+14] +
+			34 * value_buffer[i+15] +
+			21 * value_buffer[i+16] +
+			12 * value_buffer[i+17]) >> 14;
+	case 5:
+		if (i < 33 || (buffer_length - 33) <= i)
+			return 0;
+		return (6 * value_buffer[i-33] +
+			8 * value_buffer[i-32] +
+			11 * value_buffer[i-31] +
+			14 * value_buffer[i-30] +
+			18 * value_buffer[i-29] +
+			23 * value_buffer[i-28] +
+			29 * value_buffer[i-27] +
+			36 * value_buffer[i-26] +
+			45 * value_buffer[i-25] +
+			55 * value_buffer[i-24] +
+			67 * value_buffer[i-23] +
+			80 * value_buffer[i-22] +
+			96 * value_buffer[i-21] +
+			114 * value_buffer[i-20] +
+			134 * value_buffer[i-19] +
+			156 * value_buffer[i-18] +
+			180 * value_buffer[i-17] +
+			207 * value_buffer[i-16] +
+			235 * value_buffer[i-15] +
+			265 * value_buffer[i-14] +
+			296 * value_buffer[i-13] +
+			329 * value_buffer[i-12] +
+			361 * value_buffer[i-11] +
+			394 * value_buffer[i-10] +
+			426 * value_buffer[i-9] +
+			457 * value_buffer[i-8] +
+			487 * value_buffer[i-7] +
+			514 * value_buffer[i-6] +
+			538 * value_buffer[i-5] +
+			558 * value_buffer[i-4] +
+			574 * value_buffer[i-3] +
+			586 * value_buffer[i-2] +
+			594 * value_buffer[i-1] +
+			596 * value_buffer[i+0] +
+			594 * value_buffer[i+1] +
+			586 * value_buffer[i+2] +
+			574 * value_buffer[i+3] +
+			558 * value_buffer[i+4] +
+			538 * value_buffer[i+5] +
+			514 * value_buffer[i+6] +
+			487 * value_buffer[i+7] +
+			457 * value_buffer[i+8] +
+			426 * value_buffer[i+9] +
+			394 * value_buffer[i+10] +
+			361 * value_buffer[i+11] +
+			329 * value_buffer[i+12] +
+			296 * value_buffer[i+13] +
+			265 * value_buffer[i+14] +
+			235 * value_buffer[i+15] +
+			207 * value_buffer[i+16] +
+			180 * value_buffer[i+17] +
+			156 * value_buffer[i+18] +
+			134 * value_buffer[i+19] +
+			114 * value_buffer[i+20] +
+			96 * value_buffer[i+21] +
+			80 * value_buffer[i+22] +
+			67 * value_buffer[i+23] +
+			55 * value_buffer[i+24] +
+			45 * value_buffer[i+25] +
+			36 * value_buffer[i+26] +
+			29 * value_buffer[i+27] +
+			23 * value_buffer[i+28] +
+			18 * value_buffer[i+29] +
+			14 * value_buffer[i+30] +
+			11 * value_buffer[i+31] +
+			8 * value_buffer[i+32] +
+			6 * value_buffer[i+33]) >> 14;
+	case 6:
+		if (i < 65 || (buffer_length - 65) <= i)
+			return 0;
+		return (3 * value_buffer[i-65] +
+			3 * value_buffer[i-64] +
+			4 * value_buffer[i-63] +
+			5 * value_buffer[i-62] +
+			5 * value_buffer[i-61] +
+			6 * value_buffer[i-60] +
+			7 * value_buffer[i-59] +
+			8 * value_buffer[i-58] +
+			9 * value_buffer[i-57] +
+			10 * value_buffer[i-56] +
+			12 * value_buffer[i-55] +
+			13 * value_buffer[i-54] +
+			15 * value_buffer[i-53] +
+			17 * value_buffer[i-52] +
+			19 * value_buffer[i-51] +
+			21 * value_buffer[i-50] +
+			23 * value_buffer[i-49] +
+			26 * value_buffer[i-48] +
+			28 * value_buffer[i-47] +
+			31 * value_buffer[i-46] +
+			35 * value_buffer[i-45] +
+			38 * value_buffer[i-44] +
+			42 * value_buffer[i-43] +
+			46 * value_buffer[i-42] +
+			50 * value_buffer[i-41] +
+			55 * value_buffer[i-40] +
+			60 * value_buffer[i-39] +
+			65 * value_buffer[i-38] +
+			70 * value_buffer[i-37] +
+			76 * value_buffer[i-36] +
+			82 * value_buffer[i-35] +
+			88 * value_buffer[i-34] +
+			95 * value_buffer[i-33] +
+			102 * value_buffer[i-32] +
+			109 * value_buffer[i-31] +
+			116 * value_buffer[i-30] +
+			123 * value_buffer[i-29] +
+			131 * value_buffer[i-28] +
+			139 * value_buffer[i-27] +
+			147 * value_buffer[i-26] +
+			156 * value_buffer[i-25] +
+			164 * value_buffer[i-24] +
+			172 * value_buffer[i-23] +
+			181 * value_buffer[i-22] +
+			189 * value_buffer[i-21] +
+			198 * value_buffer[i-20] +
+			206 * value_buffer[i-19] +
+			215 * value_buffer[i-18] +
+			223 * value_buffer[i-17] +
+			231 * value_buffer[i-16] +
+			238 * value_buffer[i-15] +
+			246 * value_buffer[i-14] +
+			253 * value_buffer[i-13] +
+			260 * value_buffer[i-12] +
+			266 * value_buffer[i-11] +
+			272 * value_buffer[i-10] +
+			278 * value_buffer[i-9] +
+			283 * value_buffer[i-8] +
+			288 * value_buffer[i-7] +
+			292 * value_buffer[i-6] +
+			295 * value_buffer[i-5] +
+			298 * value_buffer[i-4] +
+			300 * value_buffer[i-3] +
+			302 * value_buffer[i-2] +
+			303 * value_buffer[i-1] +
+			303 * value_buffer[i+0] +
+			303 * value_buffer[i+1] +
+			302 * value_buffer[i+2] +
+			300 * value_buffer[i+3] +
+			298 * value_buffer[i+4] +
+			295 * value_buffer[i+5] +
+			292 * value_buffer[i+6] +
+			288 * value_buffer[i+7] +
+			283 * value_buffer[i+8] +
+			278 * value_buffer[i+9] +
+			272 * value_buffer[i+10] +
+			266 * value_buffer[i+11] +
+			260 * value_buffer[i+12] +
+			253 * value_buffer[i+13] +
+			246 * value_buffer[i+14] +
+			238 * value_buffer[i+15] +
+			231 * value_buffer[i+16] +
+			223 * value_buffer[i+17] +
+			215 * value_buffer[i+18] +
+			206 * value_buffer[i+19] +
+			198 * value_buffer[i+20] +
+			189 * value_buffer[i+21] +
+			181 * value_buffer[i+22] +
+			172 * value_buffer[i+23] +
+			164 * value_buffer[i+24] +
+			156 * value_buffer[i+25] +
+			147 * value_buffer[i+26] +
+			139 * value_buffer[i+27] +
+			131 * value_buffer[i+28] +
+			123 * value_buffer[i+29] +
+			116 * value_buffer[i+30] +
+			109 * value_buffer[i+31] +
+			102 * value_buffer[i+32] +
+			95 * value_buffer[i+33] +
+			88 * value_buffer[i+34] +
+			82 * value_buffer[i+35] +
+			76 * value_buffer[i+36] +
+			70 * value_buffer[i+37] +
+			65 * value_buffer[i+38] +
+			60 * value_buffer[i+39] +
+			55 * value_buffer[i+40] +
+			50 * value_buffer[i+41] +
+			46 * value_buffer[i+42] +
+			42 * value_buffer[i+43] +
+			38 * value_buffer[i+44] +
+			35 * value_buffer[i+45] +
+			31 * value_buffer[i+46] +
+			28 * value_buffer[i+47] +
+			26 * value_buffer[i+48] +
+			23 * value_buffer[i+49] +
+			21 * value_buffer[i+50] +
+			19 * value_buffer[i+51] +
+			17 * value_buffer[i+52] +
+			15 * value_buffer[i+53] +
+			13 * value_buffer[i+54] +
+			12 * value_buffer[i+55] +
+			10 * value_buffer[i+56] +
+			9 * value_buffer[i+57] +
+			8 * value_buffer[i+58] +
+			7 * value_buffer[i+59] +
+			6 * value_buffer[i+60] +
+			5 * value_buffer[i+61] +
+			5 * value_buffer[i+62] +
+			4 * value_buffer[i+63] +
+			3 * value_buffer[i+64] +
+			3 * value_buffer[i+65]) >> 14;
+	default:
+		return value_buffer[i];
+	}
+	return 0;
+}
diff --git a/utils/.gitignore b/utils/.gitignore
new file mode 100644
index 0000000..ba2929c
--- /dev/null
+++ b/utils/.gitignore
@@ -0,0 +1 @@
+blur
diff --git a/utils/Makefile b/utils/Makefile
new file mode 100644
index 0000000..df7f9b3
--- /dev/null
+++ b/utils/Makefile
@@ -0,0 +1,7 @@
+CFLAGS = -std=gnu99 -W -Wall -O3
+LDFLAGS = -lm
+
+generate: blur
+	./blur > ../app/src/main/rs/blur_generated.rsh
+
+blur: blur.c
diff --git a/utils/blur.c b/utils/blur.c
new file mode 100644
index 0000000..aeaa0b6
--- /dev/null
+++ b/utils/blur.c
@@ -0,0 +1,51 @@
+/*
+Copyright 2014 Ahmet Inan <xdsopl@googlemail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+ */
+
+#include <math.h>
+#include <stdio.h>
+
+double gauss(double x, double radius)
+{
+	double sigma = radius / 3.0;
+	return radius ? exp(- x * x / (2.0 * sigma * sigma)) / sqrt(2.0 * M_PI * sigma * sigma) : 1.0;
+}
+void emit(int radius)
+{
+	printf("\t\tif (i < %d || (buffer_length - %d) <= i)\n\t\t\treturn 0;\n", radius, radius);
+	int sum = 0;
+	for (int i = -radius; i <= radius; ++i)
+		sum += 16384 * gauss(i, radius);
+	int factor = (16384 * 16384) / (sum + 1);
+	for (int i = -radius; i <= radius; ++i)
+		printf("\t\t%s%d * value_buffer[i%s%d]%s\n",
+			i != -radius ? "\t" : "return (",
+			(int)(factor * gauss(i, radius)),
+			i < 0 ? "" : "+",
+			i,
+			i != radius ? " +" : ") >> 14;"
+		);
+}
+int main()
+{
+	printf("/* code generated by 'utils/blur.c' */\n");
+	printf("static uchar value_blur(int i)\n{\n\tswitch (blur_power) {\n");
+	for (int i = 0; i < 7; ++i) {
+		printf("\tcase %d:\n", i);
+		emit((1 << i) | 1);
+	}
+	printf("\tdefault:\n\t\treturn value_buffer[i];\n\t}\n\treturn 0;\n}\n");
+	return 0;
+}