diff --git a/JavaDecoder/app/build.gradle b/JavaDecoder/app/build.gradle
new file mode 100644
index 00000000..8c030ab2
--- /dev/null
+++ b/JavaDecoder/app/build.gradle
@@ -0,0 +1,43 @@
+plugins {
+ id 'com.android.application'
+}
+
+android {
+ compileSdkVersion 30
+ buildToolsVersion "30.0.1"
+
+ defaultConfig {
+ applicationId "com.wolt.blurhash"
+ minSdkVersion 16
+ targetSdkVersion 30
+ versionCode 1
+ versionName "1.0"
+
+ testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+ }
+
+ dexOptions {
+ preDexLibraries = false
+ }
+
+ buildTypes {
+ release {
+ minifyEnabled false
+ proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+ }
+ }
+ compileOptions {
+ sourceCompatibility JavaVersion.VERSION_1_8
+ targetCompatibility JavaVersion.VERSION_1_8
+ }
+}
+
+dependencies {
+ implementation project(':library')
+
+ implementation 'androidx.appcompat:appcompat:1.2.0'
+ implementation 'com.google.android.material:material:1.2.1'
+ testImplementation 'junit:junit:4.+'
+ androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+ androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}
\ No newline at end of file
diff --git a/JavaDecoder/app/proguard-rules.pro b/JavaDecoder/app/proguard-rules.pro
new file mode 100644
index 00000000..481bb434
--- /dev/null
+++ b/JavaDecoder/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+# http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+# public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/JavaDecoder/app/src/androidTest/java/com/wolt/blurhash/ExampleInstrumentedTest.java b/JavaDecoder/app/src/androidTest/java/com/wolt/blurhash/ExampleInstrumentedTest.java
new file mode 100644
index 00000000..474d20f3
--- /dev/null
+++ b/JavaDecoder/app/src/androidTest/java/com/wolt/blurhash/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package com.wolt.blurhash;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see Testing documentation
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+ @Test
+ public void useAppContext() {
+ // Context of the app under test.
+ Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+ assertEquals("com.wolt.blurhash", appContext.getPackageName());
+ }
+}
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/AndroidManifest.xml b/JavaDecoder/app/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..e68dcf1e
--- /dev/null
+++ b/JavaDecoder/app/src/main/AndroidManifest.xml
@@ -0,0 +1,21 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/java/com/wolt/blurhash/MainActivity.java b/JavaDecoder/app/src/main/java/com/wolt/blurhash/MainActivity.java
new file mode 100644
index 00000000..d9782944
--- /dev/null
+++ b/JavaDecoder/app/src/main/java/com/wolt/blurhash/MainActivity.java
@@ -0,0 +1,39 @@
+package com.wolt.blurhash;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.graphics.Bitmap;
+import android.os.Bundle;
+import android.os.SystemClock;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.wolt.blurhash.decoder.BlurHashDecoder;
+
+/**
+ * @author Ilanthirayan Paramanathan
+ * @version 2.0.0
+ * @since 22nd of November 2020
+ */
+public class MainActivity extends AppCompatActivity {
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setContentView(R.layout.activity_main);
+ EditText etInput = findViewById(R.id.etInput);
+ TextView tvDecode = findViewById(R.id.tvDecode);
+ ImageView ivResult = findViewById(R.id.ivResult);
+ TextView ivResultTime = findViewById(R.id.ivResultTime);
+
+ tvDecode.setOnClickListener(view -> {
+ long tStart = SystemClock.elapsedRealtime();
+ Bitmap bitmap = BlurHashDecoder.getInstance().decode(etInput.getText().toString(), 20, 12, 1.0F, true);
+ long tEnd = SystemClock.elapsedRealtime();
+ long tRes = tEnd - tStart; // time in milliseconds
+ ivResult.setImageBitmap(bitmap);
+ ivResultTime.setText(String.format("Time : %dms", tRes));
+ });
+ }
+}
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/JavaDecoder/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
new file mode 100644
index 00000000..2b068d11
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -0,0 +1,30 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/res/drawable/ic_launcher_background.xml b/JavaDecoder/app/src/main/res/drawable/ic_launcher_background.xml
new file mode 100644
index 00000000..07d5da9c
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/drawable/ic_launcher_background.xml
@@ -0,0 +1,170 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/JavaDecoder/app/src/main/res/layout/activity_main.xml b/JavaDecoder/app/src/main/res/layout/activity_main.xml
new file mode 100644
index 00000000..3b22c57d
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,53 @@
+
+
+
+
+
+
+
+
+
+
+
diff --git a/JavaDecoder/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/JavaDecoder/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 00000000..eca70cfe
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+
+
+
+
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/JavaDecoder/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
new file mode 100644
index 00000000..eca70cfe
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -0,0 +1,5 @@
+
+
+
+
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/res/mipmap-hdpi/ic_launcher.png b/JavaDecoder/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 00000000..a571e600
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-hdpi/ic_launcher_round.png b/JavaDecoder/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
new file mode 100644
index 00000000..61da551c
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-hdpi/ic_launcher_round.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-mdpi/ic_launcher.png b/JavaDecoder/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 00000000..c41dd285
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-mdpi/ic_launcher_round.png b/JavaDecoder/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
new file mode 100644
index 00000000..db5080a7
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-mdpi/ic_launcher_round.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/JavaDecoder/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 00000000..6dba46da
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/JavaDecoder/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
new file mode 100644
index 00000000..da31a871
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/JavaDecoder/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 00000000..15ac6817
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/JavaDecoder/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
new file mode 100644
index 00000000..b216f2d3
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/JavaDecoder/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 00000000..f25a4197
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/JavaDecoder/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/JavaDecoder/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
new file mode 100644
index 00000000..e96783cc
Binary files /dev/null and b/JavaDecoder/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png differ
diff --git a/JavaDecoder/app/src/main/res/values-night/themes.xml b/JavaDecoder/app/src/main/res/values-night/themes.xml
new file mode 100644
index 00000000..b1630e68
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/values-night/themes.xml
@@ -0,0 +1,16 @@
+
+
+
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/res/values/colors.xml b/JavaDecoder/app/src/main/res/values/colors.xml
new file mode 100644
index 00000000..a6abb83c
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/values/colors.xml
@@ -0,0 +1,14 @@
+
+
+ #FFBB86FC
+ #FF6200EE
+ #FF3700B3
+ #FF03DAC5
+ #FF018786
+ #FF000000
+ #FFFFFFFF
+
+ #29b6f6
+ #0086c3
+ #444444
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/res/values/strings.xml b/JavaDecoder/app/src/main/res/values/strings.xml
new file mode 100644
index 00000000..012ffa78
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/values/strings.xml
@@ -0,0 +1,5 @@
+
+ BlurHash
+ BlurHash string
+ Decode!
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/main/res/values/themes.xml b/JavaDecoder/app/src/main/res/values/themes.xml
new file mode 100644
index 00000000..0557a0b9
--- /dev/null
+++ b/JavaDecoder/app/src/main/res/values/themes.xml
@@ -0,0 +1,16 @@
+
+
+
+
\ No newline at end of file
diff --git a/JavaDecoder/app/src/test/java/com/wolt/blurhash/ExampleUnitTest.java b/JavaDecoder/app/src/test/java/com/wolt/blurhash/ExampleUnitTest.java
new file mode 100644
index 00000000..bbcc2800
--- /dev/null
+++ b/JavaDecoder/app/src/test/java/com/wolt/blurhash/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package com.wolt.blurhash;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see Testing documentation
+ */
+public class ExampleUnitTest {
+ @Test
+ public void addition_isCorrect() {
+ assertEquals(4, 2 + 2);
+ }
+}
\ No newline at end of file
diff --git a/JavaDecoder/build.gradle b/JavaDecoder/build.gradle
new file mode 100644
index 00000000..4d24be2c
--- /dev/null
+++ b/JavaDecoder/build.gradle
@@ -0,0 +1,24 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+ repositories {
+ google()
+ jcenter()
+ }
+ dependencies {
+ classpath "com.android.tools.build:gradle:4.1.1"
+
+ // NOTE: Do not place your application dependencies here; they belong
+ // in the individual module build.gradle files
+ }
+}
+
+allprojects {
+ repositories {
+ google()
+ jcenter()
+ }
+}
+
+task clean(type: Delete) {
+ delete rootProject.buildDir
+}
\ No newline at end of file
diff --git a/JavaDecoder/gradle.properties b/JavaDecoder/gradle.properties
new file mode 100644
index 00000000..52f5917c
--- /dev/null
+++ b/JavaDecoder/gradle.properties
@@ -0,0 +1,19 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
\ No newline at end of file
diff --git a/JavaDecoder/gradlew b/JavaDecoder/gradlew
new file mode 100755
index 00000000..cccdd3d5
--- /dev/null
+++ b/JavaDecoder/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+## Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+ ls=`ls -ld "$PRG"`
+ link=`expr "$ls" : '.*-> \(.*\)$'`
+ if expr "$link" : '/.*' > /dev/null; then
+ PRG="$link"
+ else
+ PRG=`dirname "$PRG"`"/$link"
+ fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+ echo "$*"
+}
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+ CYGWIN* )
+ cygwin=true
+ ;;
+ Darwin* )
+ darwin=true
+ ;;
+ MINGW* )
+ msys=true
+ ;;
+ NONSTOP* )
+ nonstop=true
+ ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD="java"
+ which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+ MAX_FD_LIMIT=`ulimit -H -n`
+ if [ $? -eq 0 ] ; then
+ if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+ MAX_FD="$MAX_FD_LIMIT"
+ fi
+ ulimit -n $MAX_FD
+ if [ $? -ne 0 ] ; then
+ warn "Could not set maximum file descriptor limit: $MAX_FD"
+ fi
+ else
+ warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+ fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+ GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+ APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+ CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+ JAVACMD=`cygpath --unix "$JAVACMD"`
+
+ # We build the pattern for arguments to be converted via cygpath
+ ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+ SEP=""
+ for dir in $ROOTDIRSRAW ; do
+ ROOTDIRS="$ROOTDIRS$SEP$dir"
+ SEP="|"
+ done
+ OURCYGPATTERN="(^($ROOTDIRS))"
+ # Add a user-defined pattern to the cygpath arguments
+ if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+ OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+ fi
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ i=0
+ for arg in "$@" ; do
+ CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+ CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
+
+ if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
+ eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+ else
+ eval `echo args$i`="\"$arg\""
+ fi
+ i=$((i+1))
+ done
+ case $i in
+ (0) set -- ;;
+ (1) set -- "$args0" ;;
+ (2) set -- "$args0" "$args1" ;;
+ (3) set -- "$args0" "$args1" "$args2" ;;
+ (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+ (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+ (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+ (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+ (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+ (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+ esac
+fi
+
+# Escape application args
+save () {
+ for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+ echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+ cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/JavaDecoder/library/build.gradle b/JavaDecoder/library/build.gradle
new file mode 100644
index 00000000..56eb6683
--- /dev/null
+++ b/JavaDecoder/library/build.gradle
@@ -0,0 +1,38 @@
+plugins {
+ id 'com.android.library'
+}
+
+android {
+ compileSdkVersion 30
+ buildToolsVersion "30.0.1"
+
+ defaultConfig {
+ minSdkVersion 16
+ targetSdkVersion 30
+ versionCode 1
+ versionName "1.0"
+
+ testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+ consumerProguardFiles "consumer-rules.pro"
+ }
+
+ buildTypes {
+ release {
+ minifyEnabled false
+ proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+ }
+ }
+ compileOptions {
+ sourceCompatibility JavaVersion.VERSION_1_8
+ targetCompatibility JavaVersion.VERSION_1_8
+ }
+}
+
+dependencies {
+
+ implementation 'androidx.appcompat:appcompat:1.2.0'
+ implementation 'com.google.android.material:material:1.2.1'
+ testImplementation 'junit:junit:4.+'
+ androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+ androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}
\ No newline at end of file
diff --git a/JavaDecoder/library/consumer-rules.pro b/JavaDecoder/library/consumer-rules.pro
new file mode 100644
index 00000000..e69de29b
diff --git a/JavaDecoder/library/proguard-rules.pro b/JavaDecoder/library/proguard-rules.pro
new file mode 100644
index 00000000..481bb434
--- /dev/null
+++ b/JavaDecoder/library/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+# http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+# public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/JavaDecoder/library/src/androidTest/java/com/wolt/blurhash/ExampleInstrumentedTest.java b/JavaDecoder/library/src/androidTest/java/com/wolt/blurhash/ExampleInstrumentedTest.java
new file mode 100644
index 00000000..6d788f7c
--- /dev/null
+++ b/JavaDecoder/library/src/androidTest/java/com/wolt/blurhash/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package com.wolt.blurhash;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see Testing documentation
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+ @Test
+ public void useAppContext() {
+ // Context of the app under test.
+ Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+ assertEquals("com.wolt.blurhash.test", appContext.getPackageName());
+ }
+}
\ No newline at end of file
diff --git a/JavaDecoder/library/src/main/AndroidManifest.xml b/JavaDecoder/library/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..dd1f6ec7
--- /dev/null
+++ b/JavaDecoder/library/src/main/AndroidManifest.xml
@@ -0,0 +1,5 @@
+
+
+
+
\ No newline at end of file
diff --git a/JavaDecoder/library/src/main/java/com/wolt/blurhash/decoder/BlurHashDecoder.java b/JavaDecoder/library/src/main/java/com/wolt/blurhash/decoder/BlurHashDecoder.java
new file mode 100644
index 00000000..a9b8d42d
--- /dev/null
+++ b/JavaDecoder/library/src/main/java/com/wolt/blurhash/decoder/BlurHashDecoder.java
@@ -0,0 +1,204 @@
+package com.wolt.blurhash.decoder;
+
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.os.Build;
+
+import androidx.annotation.Nullable;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author Ilanthirayan Paramanathan
+ * @version 2.0.0
+ * @since 22nd of November 2020
+ */
+public class BlurHashDecoder {
+
+ // cache Math.cos() calculations to improve performance.
+ // The number of calculations can be huge for many bitmaps: width * height * numCompX * numCompY * 2 * nBitmaps
+ // the cache is enabled by default, it is recommended to disable it only when just a few images are displayed
+ private final HashMap cacheCosinesX = new HashMap<>();
+ private final HashMap cacheCosinesY = new HashMap<>();
+ private static Map charMap = new HashMap();
+
+ private static final BlurHashDecoder INSTANCE = new BlurHashDecoder();
+
+ public static BlurHashDecoder getInstance() {
+ return INSTANCE;
+ }
+
+ private BlurHashDecoder() {
+ }
+
+ static {
+ Character[] characters = {
+ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
+ 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
+ 'u', 'v', 'w', 'x', 'y', 'z', '#', '$', '%', '*', '+', ',', '-', '.', ':', ';', '=', '?', '@', '[', ']', '^', '_', '{', '|', '}', '~'
+ };
+ for (int i = 0; i < characters.length; i++) {
+ charMap.put(characters[i], i);
+ }
+ }
+
+ /**
+ * Clear calculations stored in memory cache.
+ * The cache is not big, but will increase when many image sizes are used,
+ * if the app needs memory it is recommended to clear it.
+ */
+ private void clearCache() {
+ cacheCosinesX.clear();
+ cacheCosinesY.clear();
+ }
+
+ /**
+ * Decode a blur hash into a new bitmap.
+ *
+ * @param useCache use in memory cache for the calculated math, reused by images with same size.
+ * if the cache does not exist yet it will be created and populated with new calculations.
+ * By default it is true.
+ */
+ public Bitmap decode(@Nullable String blurHash, int width, int height, float punch, boolean useCache) {
+ if (blurHash == null || blurHash.length() <= 6) {
+ return null;
+ }
+
+ int numCompEnc = decode83(blurHash, 0, 1);
+ int numCompX = numCompEnc % 9 + 1;
+ int numCompY = numCompEnc / 9 + 1;
+ if (blurHash.length() != 4 + 2 * numCompX * numCompY) {
+ return null;
+ } else {
+ int maxAcEnc = this.decode83(blurHash, 1, 2);
+ float maxAc = (float)(maxAcEnc + 1) / 166.0F;
+ float[][] colors = new float[numCompX * numCompY][];
+
+ for(int i = 0; i < numCompX * numCompY; ++i) {
+ if (i == 0) {
+ int colorEnc = decode83(blurHash, 2, 6);
+ colors [i] = decodeDc(colorEnc);
+ } else {
+ int from = 4 + i * 2;
+ int colorEnc = decode83(blurHash, from, from + 2);
+ colors [i] = decodeAc(colorEnc, maxAc * punch);
+ }
+ }
+ return composeBitmap(width, height, numCompX, numCompY, colors, useCache);
+ }
+ }
+
+ private int decode83(String str, int from, int to) {
+ int result = 0;
+ for (int i = from; i < to; i++) {
+ int index = charMap.get(str.charAt(i));
+ if (index != -1) {
+ result = result * 83 + index;
+ }
+ }
+ return result;
+ }
+
+
+ private float[] decodeDc(int colorEnc) {
+ int r = colorEnc >> 16;
+ int g = colorEnc >> 8 & 255;
+ int b = colorEnc & 255;
+ return new float[]{sRGBToLinear(r), sRGBToLinear(g), sRGBToLinear(b)};
+ }
+
+ private float sRGBToLinear(double colorEnc) {
+ float v = (float)colorEnc / 255.0F;
+ if (v <= 0.04045F) {
+ return v / 12.92F;
+ } else {
+ return (float)Math.pow((v + 0.055F) / 1.055F, 2.4F);
+ }
+ }
+
+ private float[] decodeAc(int value, float maxAc) {
+ int r = value / 361;
+ int g = (value / 19) % 19;
+ int b = value % 19;
+ return new float[]{
+ signedPow2((r - 9) / 9.0F) * maxAc,
+ signedPow2((g - 9) / 9.0F) * maxAc,
+ signedPow2((b - 9) / 9.0F) * maxAc
+ };
+ }
+
+ private float signedPow2(float value) {
+ return Math.copySign((float)Math.pow((double)value, (double)2.0F), value);
+ }
+
+ private Bitmap composeBitmap(int width, int height, int numCompX, int numCompY, float[][] colors , boolean useCache) {
+ // use an array for better performance when writing pixel colors
+ int[] imageArray = new int[width * height];
+ boolean calculateCosX = !useCache || !cacheCosinesX.containsKey(width * numCompX);
+ double[] cosinesX = getArrayForCosinesX(calculateCosX, width, numCompX);
+ boolean calculateCosY = !useCache || !cacheCosinesY.containsKey(height * numCompY);
+ double[] cosinesY = getArrayForCosinesY(calculateCosY, height, numCompY);
+ for (int y = 0; y < height; y++) {
+ for (int x = 0; x < width; x++) {
+ float r = 0.0F;
+ float g = 0.0F;
+ float b = 0.0F;
+ for (int j = 0; j < numCompY; j++) {
+ for (int i = 0; i < numCompX; i++) {
+ double cosX = getCos(cosinesX, calculateCosX, i, numCompX, x, width);
+ double cosY = getCos(cosinesY, calculateCosY, j, numCompY, y, height);
+ float basis = (float)(cosX * cosY);
+ float[] color = colors[j * numCompX + i];
+ r += color[0] * basis;
+ g += color[1] * basis;
+ b += color[2] * basis;
+ }
+ }
+
+ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+ imageArray[x + width * y] = Color.rgb(linearToSRGB(r), linearToSRGB(g), linearToSRGB(b));
+ } else {
+ imageArray[x + width * y] = Color.argb(255, linearToSRGB(r), linearToSRGB(g), linearToSRGB(b));
+ }
+ }
+ }
+ return Bitmap.createBitmap(imageArray, width, height, Bitmap.Config.ARGB_8888);
+ }
+
+ private double[] getArrayForCosinesY(boolean calculate, int height, int numCompY) {
+ if (calculate) {
+ double[] cosinesY = new double[height * numCompY];
+ cacheCosinesY.put(height * numCompY, cosinesY);
+ return cosinesY;
+ } else {
+ return (double[]) cacheCosinesY.get(height * numCompY);
+ }
+ }
+
+ private double[] getArrayForCosinesX(boolean calculate, int width, int numCompX) {
+ if (calculate) {
+ double[] cosinesX = new double[width * numCompX];
+ cacheCosinesX.put(width * numCompX, cosinesX);
+ return cosinesX;
+ } else {
+ return (double[]) cacheCosinesX.get(width * numCompX);
+ }
+ }
+
+ private double getCos(double[] getCos, boolean calculate, int x, int numComp, int y, int size) {
+ if (calculate) {
+ getCos[x + numComp * y] = Math.cos(Math.PI * y * x / size);
+ }
+ return getCos[x + numComp * y];
+ }
+
+ private int linearToSRGB(double value) {
+ double v = Math.max(0, Math.min(1, value));
+ if (v <= 0.0031308F) {
+ return (int) (v * 12.92F * 255.0F + 0.5F);
+ } else {
+ return (int) ((1.055F * Math.pow(v, (1 / 2.4F)) - 0.055F) * 255 + 0.5F);
+ }
+ }
+}
diff --git a/JavaDecoder/library/src/test/java/com/wolt/blurhash/ExampleUnitTest.java b/JavaDecoder/library/src/test/java/com/wolt/blurhash/ExampleUnitTest.java
new file mode 100644
index 00000000..bbcc2800
--- /dev/null
+++ b/JavaDecoder/library/src/test/java/com/wolt/blurhash/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package com.wolt.blurhash;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see Testing documentation
+ */
+public class ExampleUnitTest {
+ @Test
+ public void addition_isCorrect() {
+ assertEquals(4, 2 + 2);
+ }
+}
\ No newline at end of file
diff --git a/JavaDecoder/settings.gradle b/JavaDecoder/settings.gradle
new file mode 100644
index 00000000..c8b1ba68
--- /dev/null
+++ b/JavaDecoder/settings.gradle
@@ -0,0 +1,3 @@
+include ':library'
+include ':app'
+rootProject.name = "Java Decoder"
\ No newline at end of file