From fa8281de831a5ab301651b1be8b283ddd2aeb535 Mon Sep 17 00:00:00 2001 From: 2Ra66it Date: Sat, 14 May 2022 17:14:39 +0300 Subject: [PATCH] Add android support --- .idea/.gitignore | 3 + android/.gitignore | 175 ++++ android/app/build.gradle | 37 + android/app/proguard-rules.pro | 21 + .../ExampleInstrumentedTest.java | 26 + android/app/src/main/AndroidManifest.xml | 23 + .../qrcodegeneratorexample/MainActivity.java | 27 + .../QRCodeGenerator.java | 34 + .../drawable-v24/ic_launcher_foreground.xml | 30 + .../res/drawable/ic_launcher_background.xml | 170 ++++ .../app/src/main/res/layout/activity_main.xml | 28 + .../res/mipmap-anydpi-v26/ic_launcher.xml | 5 + .../mipmap-anydpi-v26/ic_launcher_round.xml | 5 + .../src/main/res/mipmap-hdpi/ic_launcher.webp | Bin 0 -> 1404 bytes .../res/mipmap-hdpi/ic_launcher_round.webp | Bin 0 -> 2898 bytes .../src/main/res/mipmap-mdpi/ic_launcher.webp | Bin 0 -> 982 bytes .../res/mipmap-mdpi/ic_launcher_round.webp | Bin 0 -> 1772 bytes .../main/res/mipmap-xhdpi/ic_launcher.webp | Bin 0 -> 1900 bytes .../res/mipmap-xhdpi/ic_launcher_round.webp | Bin 0 -> 3918 bytes .../main/res/mipmap-xxhdpi/ic_launcher.webp | Bin 0 -> 2884 bytes .../res/mipmap-xxhdpi/ic_launcher_round.webp | Bin 0 -> 5914 bytes .../main/res/mipmap-xxxhdpi/ic_launcher.webp | Bin 0 -> 3844 bytes .../res/mipmap-xxxhdpi/ic_launcher_round.webp | Bin 0 -> 7778 bytes .../app/src/main/res/values-night/themes.xml | 16 + android/app/src/main/res/values/colors.xml | 10 + android/app/src/main/res/values/strings.xml | 3 + android/app/src/main/res/values/themes.xml | 16 + .../ExampleUnitTest.java | 17 + android/build.gradle | 9 + android/gradle.properties | 21 + .../gradle/wrapper/gradle-wrapper.properties | 6 + android/gradlew | 185 ++++ android/gradlew.bat | 89 ++ android/qrcodegen/build.gradle | 28 + android/qrcodegen/consumer-rules.pro | 0 android/qrcodegen/proguard-rules.pro | 21 + .../ExampleInstrumentedTest.java | 26 + .../qrcodegen/src/main/AndroidManifest.xml | 2 + .../ru/ra66it/qrcodegenerator/BitBuffer.java | 134 +++ .../qrcodegenerator/DataTooLongException.java | 59 ++ .../ru/ra66it/qrcodegenerator/QrCode.java | 868 ++++++++++++++++++ .../ru/ra66it/qrcodegenerator/QrSegment.java | 330 +++++++ .../qrcodegenerator/QrSegmentAdvanced.java | 460 ++++++++++ .../qrcodegenerator/ExampleUnitTest.java | 17 + android/settings.gradle | 17 + 45 files changed, 2918 insertions(+) create mode 100644 .idea/.gitignore create mode 100644 android/.gitignore create mode 100644 android/app/build.gradle create mode 100644 android/app/proguard-rules.pro create mode 100644 android/app/src/androidTest/java/ru/ra66it/qrcodegeneratorexample/ExampleInstrumentedTest.java create mode 100644 android/app/src/main/AndroidManifest.xml create mode 100644 android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/MainActivity.java create mode 100644 android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/QRCodeGenerator.java create mode 100644 android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml create mode 100644 android/app/src/main/res/drawable/ic_launcher_background.xml create mode 100644 android/app/src/main/res/layout/activity_main.xml create mode 100644 android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml create mode 100644 android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml create mode 100644 android/app/src/main/res/mipmap-hdpi/ic_launcher.webp create mode 100644 android/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp create mode 100644 android/app/src/main/res/mipmap-mdpi/ic_launcher.webp create mode 100644 android/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp create mode 100644 android/app/src/main/res/mipmap-xhdpi/ic_launcher.webp create mode 100644 android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp create mode 100644 android/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp create mode 100644 android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp create mode 100644 android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp create mode 100644 android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp create mode 100644 android/app/src/main/res/values-night/themes.xml create mode 100644 android/app/src/main/res/values/colors.xml create mode 100644 android/app/src/main/res/values/strings.xml create mode 100644 android/app/src/main/res/values/themes.xml create mode 100644 android/app/src/test/java/ru/ra66it/qrcodegeneratorexample/ExampleUnitTest.java create mode 100644 android/build.gradle create mode 100644 android/gradle.properties create mode 100644 android/gradle/wrapper/gradle-wrapper.properties create mode 100755 android/gradlew create mode 100644 android/gradlew.bat create mode 100644 android/qrcodegen/build.gradle create mode 100644 android/qrcodegen/consumer-rules.pro create mode 100644 android/qrcodegen/proguard-rules.pro create mode 100644 android/qrcodegen/src/androidTest/java/ru/ra66it/qrcodegenerator/ExampleInstrumentedTest.java create mode 100644 android/qrcodegen/src/main/AndroidManifest.xml create mode 100644 android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/BitBuffer.java create mode 100644 android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/DataTooLongException.java create mode 100644 android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrCode.java create mode 100644 android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegment.java create mode 100644 android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegmentAdvanced.java create mode 100644 android/qrcodegen/src/test/java/ru/ra66it/qrcodegenerator/ExampleUnitTest.java create mode 100644 android/settings.gradle diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..26d3352 --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,3 @@ +# Default ignored files +/shelf/ +/workspace.xml diff --git a/android/.gitignore b/android/.gitignore new file mode 100644 index 0000000..b869903 --- /dev/null +++ b/android/.gitignore @@ -0,0 +1,175 @@ +# Created by https://www.gitignore.io/api/android,androidstudio +#gradle.properties +#gradlew +#gradlew.bat + +### Android ### +# Built application files +*.apk +*.ap_ + +# Files for the ART/Dalvik VM +*.dex + +# Java class files +*.class + +# Generated files +bin/ +gen/ +out/ + +# Gradle files +.gradle/ +build/ + +# Local configuration file (sdk path, etc) +local.properties + +# Proguard folder generated by Eclipse +proguard/ + +# Log Files +*.log + +# Android Studio Navigation editor temp files +.navigation/ + +# Android Studio captures folder +captures/ + +# Intellij +*.iml +.idea/ +.idea/workspace.xml +.idea/tasks.xml +.idea/gradle.xml +.idea/dictionaries +.idea/libraries + +# Keystore files +*.jks + +# External native build folder generated in Android Studio 2.2 and later +.externalNativeBuild + +# Google Services (e.g. APIs or Firebase) +google-services.json + +# Freeline +freeline.py +freeline/ +freeline_project_description.json + +### Android Patch ### +gen-external-apklibs + +### AndroidStudio ### +# Covers files to be ignored for android development using Android Studio. + +# Built application files + +# Files for the ART/Dalvik VM + +# Java class files + +# Generated files + +# Gradle files +.gradle + +# Signing files +.signing/ + +# Local configuration file (sdk path, etc) + +# Proguard folder generated by Eclipse + +# Log Files + +# Android Studio +/*/build/ +/*/local.properties +/*/out +/*/*/build +/*/*/production +*.ipr +*~ +*.swp + +# Android Patch + +# External native build folder generated in Android Studio 2.2 and later + +# NDK +obj/ + +# IntelliJ IDEA +*.iws +/out/ + +# User-specific configurations +.idea/libraries/ +.idea/.name +.idea/compiler.xml +.idea/copyright/profiles_settings.xml +.idea/encodings.xml +.idea/misc.xml +.idea/modules.xml +.idea/scopes/scope_settings.xml +.idea/vcs.xml +.idea/jsLibraryMappings.xml +.idea/datasources.xml +.idea/dataSources.ids +.idea/sqlDataSources.xml +.idea/dynamic.xml +.idea/uiDesigner.xml + +# Keystore files + +# OS-specific files +.DS_Store +.DS_Store? +._* +.Spotlight-V100 +.Trashes +ehthumbs.db +Thumbs.db + +# Legacy Eclipse project files +.classpath +.project + +# Mobile Tools for Java (J2ME) +.mtj.tmp/ + +# Package Files # +*.jar +*.war +*.ear + +# virtual machine crash logs (Reference: http://www.java.com/en/download/help/error_hotspot.xml) +hs_err_pid* + +## Plugin-specific files: + +# mpeltonen/sbt-idea plugin +.idea_modules/ + +# JIRA plugin +atlassian-ide-plugin.xml + +# Mongo Explorer plugin +.idea/mongoSettings.xml + +# Crashlytics plugin (for Android Studio and IntelliJ) +com_crashlytics_export_strings.xml +crashlytics.properties +crashlytics-build.properties +fabric.properties + + +# End of https://www.gitignore.io/api/android,androidstudio + +#gradle/* +publishing-scripts/* \ No newline at end of file diff --git a/android/app/build.gradle b/android/app/build.gradle new file mode 100644 index 0000000..be8e3ec --- /dev/null +++ b/android/app/build.gradle @@ -0,0 +1,37 @@ +plugins { + id 'com.android.application' +} + +android { + compileSdk 31 + + defaultConfig { + applicationId "ru.ra66it.qrcodegeneratorexample" + minSdk 19 + targetSdk 31 + versionCode 1 + versionName "1.0" + + testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" + } + + 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:1.4.1' + implementation 'com.google.android.material:material:1.5.0' + implementation project(path: ':qrcodegen') + testImplementation 'junit:junit:4.13.2' + androidTestImplementation 'androidx.test.ext:junit:1.1.3' + androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0' +} \ No newline at end of file diff --git a/android/app/proguard-rules.pro b/android/app/proguard-rules.pro new file mode 100644 index 0000000..481bb43 --- /dev/null +++ b/android/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/android/app/src/androidTest/java/ru/ra66it/qrcodegeneratorexample/ExampleInstrumentedTest.java b/android/app/src/androidTest/java/ru/ra66it/qrcodegeneratorexample/ExampleInstrumentedTest.java new file mode 100644 index 0000000..66786d6 --- /dev/null +++ b/android/app/src/androidTest/java/ru/ra66it/qrcodegeneratorexample/ExampleInstrumentedTest.java @@ -0,0 +1,26 @@ +package ru.ra66it.qrcodegeneratorexample; + +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("ru.ra66it.qrcodegeneratorexample", appContext.getPackageName()); + } +} \ No newline at end of file diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml new file mode 100644 index 0000000..3649a3a --- /dev/null +++ b/android/app/src/main/AndroidManifest.xml @@ -0,0 +1,23 @@ + + + + + + + + + + + + + + \ No newline at end of file diff --git a/android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/MainActivity.java b/android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/MainActivity.java new file mode 100644 index 0000000..6cacb20 --- /dev/null +++ b/android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/MainActivity.java @@ -0,0 +1,27 @@ +package ru.ra66it.qrcodegeneratorexample; + +import androidx.appcompat.app.AppCompatActivity; + +import android.graphics.Bitmap; +import android.os.Bundle; +import android.widget.ImageView; +import android.widget.TextView; + +public class MainActivity extends AppCompatActivity { + + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + setContentView(R.layout.activity_main); + + ImageView imageView = findViewById(R.id.imageView); + TextView textView = findViewById(R.id.textView); + + QRCodeGenerator qrCodeGenerator = new QRCodeGenerator(); + String content = "Hello World!"; + Bitmap bitmap = qrCodeGenerator.generate(content); + + imageView.setImageBitmap(bitmap); + textView.setText(content); + } +} \ No newline at end of file diff --git a/android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/QRCodeGenerator.java b/android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/QRCodeGenerator.java new file mode 100644 index 0000000..7cbefbb --- /dev/null +++ b/android/app/src/main/java/ru/ra66it/qrcodegeneratorexample/QRCodeGenerator.java @@ -0,0 +1,34 @@ +package ru.ra66it.qrcodegeneratorexample; + +import android.graphics.Bitmap; +import android.graphics.Color; + +import ru.ra66it.qrcodegenerator.QrCode; + +public class QRCodeGenerator { + + public Bitmap generate(String content) { + QrCode qr = QrCode.encodeText(content, QrCode.Ecc.HIGH); + int scale = 8; + + int size = qr.size * scale; + + Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888); + + for (int x = 0; x < size; x++) { + for (int y = 0; y < size; y++) { + boolean isDark = qr.getModule(x / scale, y / scale); + int color; + if (isDark) { + color = Color.BLACK; + } else { + color = Color.WHITE; + } + + bitmap.setPixel(x, y, color); + } + } + + return bitmap; + } +} diff --git a/android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml new file mode 100644 index 0000000..2b068d1 --- /dev/null +++ b/android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml @@ -0,0 +1,30 @@ + + + + + + + + + + + \ No newline at end of file diff --git a/android/app/src/main/res/drawable/ic_launcher_background.xml b/android/app/src/main/res/drawable/ic_launcher_background.xml new file mode 100644 index 0000000..07d5da9 --- /dev/null +++ b/android/app/src/main/res/drawable/ic_launcher_background.xml @@ -0,0 +1,170 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/android/app/src/main/res/layout/activity_main.xml b/android/app/src/main/res/layout/activity_main.xml new file mode 100644 index 0000000..21fc722 --- /dev/null +++ b/android/app/src/main/res/layout/activity_main.xml @@ -0,0 +1,28 @@ + + + + + + + + \ No newline at end of file diff --git a/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml new file mode 100644 index 0000000..eca70cf --- /dev/null +++ b/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml @@ -0,0 +1,5 @@ + + + + + \ No newline at end of file diff --git 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UmY2RIYtNPVDpE$%vda+HD#3m z&VuXJ{BK&Qe+rBa7eq}Q(bq|tn(RrJAk|ztj2(i{d>nmQnM?;HF2k&9sA6up5tmjl z7lySlzMbifH17-m-Lwa_F&e7nOH?ESi3#ckR3tsM+jsck3`oG!uMS}|eAwVXv>}qxwq?QY%QJ0}r@^;fhuUA9W z*BVl>TGo&N004@xSiwDUXUvp51sVmqO3m)=B55aPwf@0=e}cN+$-BdKxY`YrT_4)0 z_d10#i44Q*rFr8MC>*)v$EJvz``(pb{e&*6k+b zsMz%($|1+8hn8c2?P(l@;Rb&CsZeYoCI3?2!LqjbwPXW3z4G$Qfj=cT5Yb%vY0(AX oeb?AaKtwrnc|$|zzw9vfvn^aJJ!zd)XFXqqy0000001=f@-~a#s literal 0 HcmV?d00001 diff --git a/android/app/src/main/res/values-night/themes.xml b/android/app/src/main/res/values-night/themes.xml new file mode 100644 index 0000000..9500220 --- /dev/null +++ b/android/app/src/main/res/values-night/themes.xml @@ -0,0 +1,16 @@ + + + + \ No newline at end of file diff --git a/android/app/src/main/res/values/colors.xml b/android/app/src/main/res/values/colors.xml new file mode 100644 index 0000000..f8c6127 --- /dev/null +++ b/android/app/src/main/res/values/colors.xml @@ -0,0 +1,10 @@ + + + #FFBB86FC + #FF6200EE + #FF3700B3 + #FF03DAC5 + #FF018786 + #FF000000 + #FFFFFFFF + \ No newline at end of file diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml new file mode 100644 index 0000000..4ae974b --- /dev/null +++ b/android/app/src/main/res/values/strings.xml @@ -0,0 +1,3 @@ + + QRCodeGeneratorExample + \ No newline at end of file diff --git a/android/app/src/main/res/values/themes.xml b/android/app/src/main/res/values/themes.xml new file mode 100644 index 0000000..943a891 --- /dev/null +++ b/android/app/src/main/res/values/themes.xml @@ -0,0 +1,16 @@ + + + + \ No newline at end of file diff --git a/android/app/src/test/java/ru/ra66it/qrcodegeneratorexample/ExampleUnitTest.java b/android/app/src/test/java/ru/ra66it/qrcodegeneratorexample/ExampleUnitTest.java new file mode 100644 index 0000000..537b751 --- /dev/null +++ b/android/app/src/test/java/ru/ra66it/qrcodegeneratorexample/ExampleUnitTest.java @@ -0,0 +1,17 @@ +package ru.ra66it.qrcodegeneratorexample; + +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/android/build.gradle b/android/build.gradle new file mode 100644 index 0000000..905d3bd --- /dev/null +++ b/android/build.gradle @@ -0,0 +1,9 @@ +// Top-level build file where you can add configuration options common to all sub-projects/modules. +plugins { + id 'com.android.application' version '7.1.3' apply false + id 'com.android.library' version '7.1.3' apply false +} + +task clean(type: Delete) { + delete rootProject.buildDir +} \ No newline at end of file diff --git a/android/gradle.properties b/android/gradle.properties new file mode 100644 index 0000000..dab7c28 --- /dev/null +++ b/android/gradle.properties @@ -0,0 +1,21 @@ +# 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 +# Enables namespacing of each library's R class so that its R class includes only the +# resources declared in the library itself and none from the library's dependencies, +# thereby reducing the size of the R class for that library +android.nonTransitiveRClass=true \ No newline at end of file diff --git a/android/gradle/wrapper/gradle-wrapper.properties b/android/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..25a792e --- /dev/null +++ b/android/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,6 @@ +#Mon Apr 11 15:41:32 MSK 2022 +distributionBase=GRADLE_USER_HOME +distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip +distributionPath=wrapper/dists +zipStorePath=wrapper/dists +zipStoreBase=GRADLE_USER_HOME diff --git a/android/gradlew b/android/gradlew new file mode 100755 index 0000000..4f906e0 --- /dev/null +++ b/android/gradlew @@ -0,0 +1,185 @@ +#!/usr/bin/env sh + +# +# Copyright 2015 the original author or authors. +# +# 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 +# +# https://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. +# + +############################################################################## +## +## 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 "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn () { + echo "$*" +} + +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 or MSYS, switch paths to Windows format before running java +if [ "$cygwin" = "true" -o "$msys" = "true" ] ; 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=`expr $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" + +exec "$JAVACMD" "$@" diff --git a/android/gradlew.bat b/android/gradlew.bat new file mode 100644 index 0000000..107acd3 --- /dev/null +++ b/android/gradlew.bat @@ -0,0 +1,89 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/android/qrcodegen/build.gradle b/android/qrcodegen/build.gradle new file mode 100644 index 0000000..1dce886 --- /dev/null +++ b/android/qrcodegen/build.gradle @@ -0,0 +1,28 @@ +plugins { + id 'com.android.library' +} + +android { + compileSdk 31 + + defaultConfig { + minSdk 19 + targetSdk 31 + + testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" + consumerProguardFiles "consumer-rules.pro" + } + + buildTypes { + release { + minifyEnabled false + proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' + } + } +} + +dependencies { + testImplementation 'junit:junit:4.13.2' + androidTestImplementation 'androidx.test.ext:junit:1.1.3' + androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0' +} \ No newline at end of file diff --git a/android/qrcodegen/consumer-rules.pro b/android/qrcodegen/consumer-rules.pro new file mode 100644 index 0000000..e69de29 diff --git a/android/qrcodegen/proguard-rules.pro b/android/qrcodegen/proguard-rules.pro new file mode 100644 index 0000000..481bb43 --- /dev/null +++ b/android/qrcodegen/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/android/qrcodegen/src/androidTest/java/ru/ra66it/qrcodegenerator/ExampleInstrumentedTest.java b/android/qrcodegen/src/androidTest/java/ru/ra66it/qrcodegenerator/ExampleInstrumentedTest.java new file mode 100644 index 0000000..1970550 --- /dev/null +++ b/android/qrcodegen/src/androidTest/java/ru/ra66it/qrcodegenerator/ExampleInstrumentedTest.java @@ -0,0 +1,26 @@ +package ru.ra66it.qrcodegenerator; + +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("ru.ra66it.qrcodegenerator.test", appContext.getPackageName()); + } +} \ No newline at end of file diff --git a/android/qrcodegen/src/main/AndroidManifest.xml b/android/qrcodegen/src/main/AndroidManifest.xml new file mode 100644 index 0000000..6254cd4 --- /dev/null +++ b/android/qrcodegen/src/main/AndroidManifest.xml @@ -0,0 +1,2 @@ + + diff --git a/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/BitBuffer.java b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/BitBuffer.java new file mode 100644 index 0000000..5c1c305 --- /dev/null +++ b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/BitBuffer.java @@ -0,0 +1,134 @@ +/* + * QR Code generator library (Java) + * + * Copyright (c) Project Nayuki. (MIT License) + * https://www.nayuki.io/page/qr-code-generator-library + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * - The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * - The Software is provided "as is", without warranty of any kind, express or + * implied, including but not limited to the warranties of merchantability, + * fitness for a particular purpose and noninfringement. In no event shall the + * authors or copyright holders be liable for any claim, damages or other + * liability, whether in an action of contract, tort or otherwise, arising from, + * out of or in connection with the Software or the use or other dealings in the + * Software. + */ + +package ru.ra66it.qrcodegenerator; + +import java.util.BitSet; +import java.util.Objects; + + +/** + * An appendable sequence of bits (0s and 1s). Mainly used by {@link QrSegment}. + */ +public final class BitBuffer implements Cloneable { + + /*---- Fields ----*/ + + private BitSet data; + + private int bitLength; // Non-negative + + + + /*---- Constructor ----*/ + + /** + * Constructs an empty bit buffer (length 0). + */ + public BitBuffer() { + data = new BitSet(); + bitLength = 0; + } + + + + /*---- Methods ----*/ + + /** + * Returns the length of this sequence, which is a non-negative value. + * + * @return the length of this sequence + */ + public int bitLength() { + assert bitLength >= 0; + return bitLength; + } + + + /** + * Returns the bit at the specified index, yielding 0 or 1. + * + * @param index the index to get the bit at + * @return the bit at the specified index + * @throws IndexOutOfBoundsException if index < 0 or index ≥ bitLength + */ + public int getBit(int index) { + if (index < 0 || index >= bitLength) + throw new IndexOutOfBoundsException(); + return data.get(index) ? 1 : 0; + } + + + /** + * Appends the specified number of low-order bits of the specified value to this + * buffer. Requires 0 ≤ len ≤ 31 and 0 ≤ val < 2len. + * + * @param val the value to append + * @param len the number of low-order bits in the value to take + * @throws IllegalArgumentException if the value or number of bits is out of range + * @throws IllegalStateException if appending the data + * would make bitLength exceed Integer.MAX_VALUE + */ + public void appendBits(int val, int len) { + if (len < 0 || len > 31 || val >>> len != 0) + throw new IllegalArgumentException("Value out of range"); + if (Integer.MAX_VALUE - bitLength < len) + throw new IllegalStateException("Maximum length reached"); + for (int i = len - 1; i >= 0; i--, bitLength++) // Append bit by bit + data.set(bitLength, QrCode.getBit(val, i)); + } + + + /** + * Appends the content of the specified bit buffer to this buffer. + * + * @param bb the bit buffer whose data to append (not {@code null}) + * @throws NullPointerException if the bit buffer is {@code null} + * @throws IllegalStateException if appending the data + * would make bitLength exceed Integer.MAX_VALUE + */ + public void appendData(BitBuffer bb) { + Objects.requireNonNull(bb); + if (Integer.MAX_VALUE - bitLength < bb.bitLength) + throw new IllegalStateException("Maximum length reached"); + for (int i = 0; i < bb.bitLength; i++, bitLength++) // Append bit by bit + data.set(bitLength, bb.data.get(i)); + } + + + /** + * Returns a new copy of this buffer. + * + * @return a new copy of this buffer (not {@code null}) + */ + public BitBuffer clone() { + try { + BitBuffer result = (BitBuffer) super.clone(); + result.data = (BitSet) result.data.clone(); + return result; + } catch (CloneNotSupportedException e) { + throw new AssertionError(e); + } + } + +} diff --git a/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/DataTooLongException.java b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/DataTooLongException.java new file mode 100644 index 0000000..bab72c3 --- /dev/null +++ b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/DataTooLongException.java @@ -0,0 +1,59 @@ +/* + * QR Code generator library (Java) + * + * Copyright (c) Project Nayuki. (MIT License) + * https://www.nayuki.io/page/qr-code-generator-library + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * - The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * - The Software is provided "as is", without warranty of any kind, express or + * implied, including but not limited to the warranties of merchantability, + * fitness for a particular purpose and noninfringement. In no event shall the + * authors or copyright holders be liable for any claim, damages or other + * liability, whether in an action of contract, tort or otherwise, arising from, + * out of or in connection with the Software or the use or other dealings in the + * Software. + */ + +package ru.ra66it.qrcodegenerator; + + +/** + * Thrown when the supplied data does not fit any QR Code version. Ways to handle this exception include: + *

    + *

  • Decrease the error correction level if it was greater than {@code Ecc.LOW}.

    • + *

  • If the advanced {@code encodeSegments()} function with 6 arguments or the + * {@code makeSegmentsOptimally()} function was called, then increase the maxVersion argument + * if it was less than {@link QrCode#MAX_VERSION}. (This advice does not apply to the other + * factory functions because they search all versions up to {@code QrCode.MAX_VERSION}.)

    • + *

  • Split the text data into better or optimal segments in order to reduce the number of + * bits required. (See {@link QrSegmentAdvanced#makeSegmentsOptimally(String, QrCode.Ecc, int, int) + * QrSegmentAdvanced.makeSegmentsOptimally()}.)

    • + *

  • Change the text or binary data to be shorter.

    • + *

  • Change the text to fit the character set of a particular segment mode (e.g. alphanumeric).

    • + *

  • Propagate the error upward to the caller/user.

    • + *
+ * + * @see QrCode#encodeText(CharSequence, QrCode.Ecc) + * @see QrCode#encodeBinary(byte[], QrCode.Ecc) + * @see QrCode#encodeSegments(java.util.List, QrCode.Ecc) + * @see QrCode#encodeSegments(java.util.List, QrCode.Ecc, int, int, int, boolean) + * @see QrSegmentAdvanced#makeSegmentsOptimally(String, QrCode.Ecc, int, int) + */ +public class DataTooLongException extends IllegalArgumentException { + + public DataTooLongException() { + } + + + public DataTooLongException(String msg) { + super(msg); + } + +} diff --git a/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrCode.java b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrCode.java new file mode 100644 index 0000000..1dd8ea3 --- /dev/null +++ b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrCode.java @@ -0,0 +1,868 @@ +/* + * QR Code generator library (Java) + * + * Copyright (c) Project Nayuki. (MIT License) + * https://www.nayuki.io/page/qr-code-generator-library + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * - The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * - The Software is provided "as is", without warranty of any kind, express or + * implied, including but not limited to the warranties of merchantability, + * fitness for a particular purpose and noninfringement. In no event shall the + * authors or copyright holders be liable for any claim, damages or other + * liability, whether in an action of contract, tort or otherwise, arising from, + * out of or in connection with the Software or the use or other dealings in the + * Software. + */ + +package ru.ra66it.qrcodegenerator; + +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Objects; + + +/** + * A QR Code symbol, which is a type of two-dimension barcode. + * Invented by Denso Wave and described in the ISO/IEC 18004 standard. + *

Instances of this class represent an immutable square grid of dark and light cells. + * The class provides static factory functions to create a QR Code from text or binary data. + * The class covers the QR Code Model 2 specification, supporting all versions (sizes) + * from 1 to 40, all 4 error correction levels, and 4 character encoding modes.

+ *

Ways to create a QR Code object:

+ *
    + *

  • High level: Take the payload data and call {@link QrCode#encodeText(CharSequence, Ecc)} + * or {@link QrCode#encodeBinary(byte[], Ecc)}.

    • + *

  • Mid level: Custom-make the list of {@link QrSegment segments} + * and call {@link QrCode#encodeSegments(List, Ecc)} or + * {@link QrCode#encodeSegments(List, Ecc, int, int, int, boolean)}

    • + *

  • Low level: Custom-make the array of data codeword bytes (including segment headers and + * final padding, excluding error correction codewords), supply the appropriate version number, + * and call the {@link QrCode#QrCode(int, Ecc, byte[], int) constructor}.

    • + *
+ *

(Note that all ways require supplying the desired error correction level.)

+ * + * @see QrSegment + */ +public final class QrCode { + + /*---- Static factory functions (high level) ----*/ + + /** + * Returns a QR Code representing the specified Unicode text string at the specified error correction level. + * As a conservative upper bound, this function is guaranteed to succeed for strings that have 738 or fewer + * Unicode code points (not UTF-16 code units) if the low error correction level is used. The smallest possible + * QR Code version is automatically chosen for the output. The ECC level of the result may be higher than the + * ecl argument if it can be done without increasing the version. + * + * @param text the text to be encoded (not {@code null}), which can be any Unicode string + * @param ecl the error correction level to use (not {@code null}) (boostable) + * @return a QR Code (not {@code null}) representing the text + * @throws NullPointerException if the text or error correction level is {@code null} + * @throws DataTooLongException if the text fails to fit in the + * largest version QR Code at the ECL, which means it is too long + */ + public static QrCode encodeText(CharSequence text, Ecc ecl) { + Objects.requireNonNull(text); + Objects.requireNonNull(ecl); + List segs = QrSegment.makeSegments(text); + return encodeSegments(segs, ecl); + } + + + /** + * Returns a QR Code representing the specified binary data at the specified error correction level. + * This function always encodes using the binary segment mode, not any text mode. The maximum number of + * bytes allowed is 2953. The smallest possible QR Code version is automatically chosen for the output. + * The ECC level of the result may be higher than the ecl argument if it can be done without increasing the version. + * + * @param data the binary data to encode (not {@code null}) + * @param ecl the error correction level to use (not {@code null}) (boostable) + * @return a QR Code (not {@code null}) representing the data + * @throws NullPointerException if the data or error correction level is {@code null} + * @throws DataTooLongException if the data fails to fit in the + * largest version QR Code at the ECL, which means it is too long + */ + public static QrCode encodeBinary(byte[] data, Ecc ecl) { + Objects.requireNonNull(data); + Objects.requireNonNull(ecl); + QrSegment seg = QrSegment.makeBytes(data); + return encodeSegments(Collections.singletonList(seg), ecl); + } + + + /*---- Static factory functions (mid level) ----*/ + + /** + * Returns a QR Code representing the specified segments at the specified error correction + * level. The smallest possible QR Code version is automatically chosen for the output. The ECC level + * of the result may be higher than the ecl argument if it can be done without increasing the version. + *

This function allows the user to create a custom sequence of segments that switches + * between modes (such as alphanumeric and byte) to encode text in less space. + * This is a mid-level API; the high-level API is {@link #encodeText(CharSequence, Ecc)} + * and {@link #encodeBinary(byte[], Ecc)}.

+ * + * @param segs the segments to encode + * @param ecl the error correction level to use (not {@code null}) (boostable) + * @return a QR Code (not {@code null}) representing the segments + * @throws NullPointerException if the list of segments, any segment, or the error correction level is {@code null} + * @throws DataTooLongException if the segments fail to fit in the + * largest version QR Code at the ECL, which means they are too long + */ + public static QrCode encodeSegments(List segs, Ecc ecl) { + return encodeSegments(segs, ecl, MIN_VERSION, MAX_VERSION, -1, true); + } + + + /** + * Returns a QR Code representing the specified segments with the specified encoding parameters. + * The smallest possible QR Code version within the specified range is automatically + * chosen for the output. Iff boostEcl is {@code true}, then the ECC level of the + * result may be higher than the ecl argument if it can be done without increasing + * the version. The mask number is either between 0 to 7 (inclusive) to force that + * mask, or −1 to automatically choose an appropriate mask (which may be slow). + *

This function allows the user to create a custom sequence of segments that switches + * between modes (such as alphanumeric and byte) to encode text in less space. + * This is a mid-level API; the high-level API is {@link #encodeText(CharSequence, Ecc)} + * and {@link #encodeBinary(byte[], Ecc)}.

+ * + * @param segs the segments to encode + * @param ecl the error correction level to use (not {@code null}) (boostable) + * @param minVersion the minimum allowed version of the QR Code (at least 1) + * @param maxVersion the maximum allowed version of the QR Code (at most 40) + * @param mask the mask number to use (between 0 and 7 (inclusive)), or −1 for automatic mask + * @param boostEcl increases the ECC level as long as it doesn't increase the version number + * @return a QR Code (not {@code null}) representing the segments + * @throws NullPointerException if the list of segments, any segment, or the error correction level is {@code null} + * @throws IllegalArgumentException if 1 ≤ minVersion ≤ maxVersion ≤ 40 + * or −1 ≤ mask ≤ 7 is violated + * @throws DataTooLongException if the segments fail to fit in + * the maxVersion QR Code at the ECL, which means they are too long + */ + public static QrCode encodeSegments(List segs, Ecc ecl, int minVersion, int maxVersion, int mask, boolean boostEcl) { + Objects.requireNonNull(segs); + Objects.requireNonNull(ecl); + if (!(MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= MAX_VERSION) || mask < -1 || mask > 7) + throw new IllegalArgumentException("Invalid value"); + + // Find the minimal version number to use + int version, dataUsedBits; + for (version = minVersion; ; version++) { + int dataCapacityBits = getNumDataCodewords(version, ecl) * 8; // Number of data bits available + dataUsedBits = QrSegment.getTotalBits(segs, version); + if (dataUsedBits != -1 && dataUsedBits <= dataCapacityBits) + break; // This version number is found to be suitable + if (version >= maxVersion) { // All versions in the range could not fit the given data + String msg = "Segment too long"; + if (dataUsedBits != -1) + msg = String.format("Data length = %d bits, Max capacity = %d bits", dataUsedBits, dataCapacityBits); + throw new DataTooLongException(msg); + } + } + assert dataUsedBits != -1; + + // Increase the error correction level while the data still fits in the current version number + for (Ecc newEcl : Ecc.values()) { // From low to high + if (boostEcl && dataUsedBits <= getNumDataCodewords(version, newEcl) * 8) + ecl = newEcl; + } + + // Concatenate all segments to create the data bit string + BitBuffer bb = new BitBuffer(); + for (QrSegment seg : segs) { + bb.appendBits(seg.mode.modeBits, 4); + bb.appendBits(seg.numChars, seg.mode.numCharCountBits(version)); + bb.appendData(seg.data); + } + assert bb.bitLength() == dataUsedBits; + + // Add terminator and pad up to a byte if applicable + int dataCapacityBits = getNumDataCodewords(version, ecl) * 8; + assert bb.bitLength() <= dataCapacityBits; + bb.appendBits(0, Math.min(4, dataCapacityBits - bb.bitLength())); + bb.appendBits(0, (8 - bb.bitLength() % 8) % 8); + assert bb.bitLength() % 8 == 0; + + // Pad with alternating bytes until data capacity is reached + for (int padByte = 0xEC; bb.bitLength() < dataCapacityBits; padByte ^= 0xEC ^ 0x11) + bb.appendBits(padByte, 8); + + // Pack bits into bytes in big endian + byte[] dataCodewords = new byte[bb.bitLength() / 8]; + for (int i = 0; i < bb.bitLength(); i++) + dataCodewords[i >>> 3] |= bb.getBit(i) << (7 - (i & 7)); + + // Create the QR Code object + return new QrCode(version, ecl, dataCodewords, mask); + } + + + + /*---- Instance fields ----*/ + + // Public immutable scalar parameters: + + /** + * The version number of this QR Code, which is between 1 and 40 (inclusive). + * This determines the size of this barcode. + */ + public final int version; + + /** + * The width and height of this QR Code, measured in modules, between + * 21 and 177 (inclusive). This is equal to version × 4 + 17. + */ + public final int size; + + /** + * The error correction level used in this QR Code, which is not {@code null}. + */ + public final Ecc errorCorrectionLevel; + + /** + * The index of the mask pattern used in this QR Code, which is between 0 and 7 (inclusive). + *

Even if a QR Code is created with automatic masking requested (mask = + * −1), the resulting object still has a mask value between 0 and 7. + */ + public final int mask; + + // Private grids of modules/pixels, with dimensions of size*size: + + // The modules of this QR Code (false = light, true = dark). + // Immutable after constructor finishes. Accessed through getModule(). + private final boolean[][] modules; + + // Indicates function modules that are not subjected to masking. Discarded when constructor finishes. + private boolean[][] isFunction; + + + + /*---- Constructor (low level) ----*/ + + /** + * Constructs a QR Code with the specified version number, + * error correction level, data codeword bytes, and mask number. + *

This is a low-level API that most users should not use directly. A mid-level + * API is the {@link #encodeSegments(List, Ecc, int, int, int, boolean)} function.

+ * + * @param ver the version number to use, which must be in the range 1 to 40 (inclusive) + * @param ecl the error correction level to use + * @param dataCodewords the bytes representing segments to encode (without ECC) + * @param msk the mask pattern to use, which is either −1 for automatic choice or from 0 to 7 for fixed choice + * @throws NullPointerException if the byte array or error correction level is {@code null} + * @throws IllegalArgumentException if the version or mask value is out of range, + * or if the data is the wrong length for the specified version and error correction level + */ + public QrCode(int ver, Ecc ecl, byte[] dataCodewords, int msk) { + // Check arguments and initialize fields + if (ver < MIN_VERSION || ver > MAX_VERSION) + throw new IllegalArgumentException("Version value out of range"); + if (msk < -1 || msk > 7) + throw new IllegalArgumentException("Mask value out of range"); + version = ver; + size = ver * 4 + 17; + errorCorrectionLevel = Objects.requireNonNull(ecl); + Objects.requireNonNull(dataCodewords); + modules = new boolean[size][size]; // Initially all light + isFunction = new boolean[size][size]; + + // Compute ECC, draw modules, do masking + drawFunctionPatterns(); + byte[] allCodewords = addEccAndInterleave(dataCodewords); + drawCodewords(allCodewords); + + // Do masking + if (msk == -1) { // Automatically choose best mask + int minPenalty = Integer.MAX_VALUE; + for (int i = 0; i < 8; i++) { + applyMask(i); + drawFormatBits(i); + int penalty = getPenaltyScore(); + if (penalty < minPenalty) { + msk = i; + minPenalty = penalty; + } + applyMask(i); // Undoes the mask due to XOR + } + } + assert 0 <= msk && msk <= 7; + mask = msk; + applyMask(msk); // Apply the final choice of mask + drawFormatBits(msk); // Overwrite old format bits + + isFunction = null; + } + + + + /*---- Public instance methods ----*/ + + /** + * Returns the color of the module (pixel) at the specified coordinates, which is {@code false} + * for light or {@code true} for dark. The top left corner has the coordinates (x=0, y=0). + * If the specified coordinates are out of bounds, then {@code false} (light) is returned. + * + * @param x the x coordinate, where 0 is the left edge and size−1 is the right edge + * @param y the y coordinate, where 0 is the top edge and size−1 is the bottom edge + * @return {@code true} if the coordinates are in bounds and the module + * at that location is dark, or {@code false} (light) otherwise + */ + public boolean getModule(int x, int y) { + return 0 <= x && x < size && 0 <= y && y < size && modules[y][x]; + } + + + + /*---- Private helper methods for constructor: Drawing function modules ----*/ + + // Reads this object's version field, and draws and marks all function modules. + private void drawFunctionPatterns() { + // Draw horizontal and vertical timing patterns + for (int i = 0; i < size; i++) { + setFunctionModule(6, i, i % 2 == 0); + setFunctionModule(i, 6, i % 2 == 0); + } + + // Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules) + drawFinderPattern(3, 3); + drawFinderPattern(size - 4, 3); + drawFinderPattern(3, size - 4); + + // Draw numerous alignment patterns + int[] alignPatPos = getAlignmentPatternPositions(); + int numAlign = alignPatPos.length; + for (int i = 0; i < numAlign; i++) { + for (int j = 0; j < numAlign; j++) { + // Don't draw on the three finder corners + if (!(i == 0 && j == 0 || i == 0 && j == numAlign - 1 || i == numAlign - 1 && j == 0)) + drawAlignmentPattern(alignPatPos[i], alignPatPos[j]); + } + } + + // Draw configuration data + drawFormatBits(0); // Dummy mask value; overwritten later in the constructor + drawVersion(); + } + + + // Draws two copies of the format bits (with its own error correction code) + // based on the given mask and this object's error correction level field. + private void drawFormatBits(int msk) { + // Calculate error correction code and pack bits + int data = errorCorrectionLevel.formatBits << 3 | msk; // errCorrLvl is uint2, mask is uint3 + int rem = data; + for (int i = 0; i < 10; i++) + rem = (rem << 1) ^ ((rem >>> 9) * 0x537); + int bits = (data << 10 | rem) ^ 0x5412; // uint15 + assert bits >>> 15 == 0; + + // Draw first copy + for (int i = 0; i <= 5; i++) + setFunctionModule(8, i, getBit(bits, i)); + setFunctionModule(8, 7, getBit(bits, 6)); + setFunctionModule(8, 8, getBit(bits, 7)); + setFunctionModule(7, 8, getBit(bits, 8)); + for (int i = 9; i < 15; i++) + setFunctionModule(14 - i, 8, getBit(bits, i)); + + // Draw second copy + for (int i = 0; i < 8; i++) + setFunctionModule(size - 1 - i, 8, getBit(bits, i)); + for (int i = 8; i < 15; i++) + setFunctionModule(8, size - 15 + i, getBit(bits, i)); + setFunctionModule(8, size - 8, true); // Always dark + } + + + // Draws two copies of the version bits (with its own error correction code), + // based on this object's version field, iff 7 <= version <= 40. + private void drawVersion() { + if (version < 7) + return; + + // Calculate error correction code and pack bits + int rem = version; // version is uint6, in the range [7, 40] + for (int i = 0; i < 12; i++) + rem = (rem << 1) ^ ((rem >>> 11) * 0x1F25); + int bits = version << 12 | rem; // uint18 + assert bits >>> 18 == 0; + + // Draw two copies + for (int i = 0; i < 18; i++) { + boolean bit = getBit(bits, i); + int a = size - 11 + i % 3; + int b = i / 3; + setFunctionModule(a, b, bit); + setFunctionModule(b, a, bit); + } + } + + + // Draws a 9*9 finder pattern including the border separator, + // with the center module at (x, y). Modules can be out of bounds. + private void drawFinderPattern(int x, int y) { + for (int dy = -4; dy <= 4; dy++) { + for (int dx = -4; dx <= 4; dx++) { + int dist = Math.max(Math.abs(dx), Math.abs(dy)); // Chebyshev/infinity norm + int xx = x + dx, yy = y + dy; + if (0 <= xx && xx < size && 0 <= yy && yy < size) + setFunctionModule(xx, yy, dist != 2 && dist != 4); + } + } + } + + + // Draws a 5*5 alignment pattern, with the center module + // at (x, y). All modules must be in bounds. + private void drawAlignmentPattern(int x, int y) { + for (int dy = -2; dy <= 2; dy++) { + for (int dx = -2; dx <= 2; dx++) + setFunctionModule(x + dx, y + dy, Math.max(Math.abs(dx), Math.abs(dy)) != 1); + } + } + + + // Sets the color of a module and marks it as a function module. + // Only used by the constructor. Coordinates must be in bounds. + private void setFunctionModule(int x, int y, boolean isDark) { + modules[y][x] = isDark; + isFunction[y][x] = true; + } + + + /*---- Private helper methods for constructor: Codewords and masking ----*/ + + // Returns a new byte string representing the given data with the appropriate error correction + // codewords appended to it, based on this object's version and error correction level. + private byte[] addEccAndInterleave(byte[] data) { + Objects.requireNonNull(data); + if (data.length != getNumDataCodewords(version, errorCorrectionLevel)) + throw new IllegalArgumentException(); + + // Calculate parameter numbers + int numBlocks = NUM_ERROR_CORRECTION_BLOCKS[errorCorrectionLevel.ordinal()][version]; + int blockEccLen = ECC_CODEWORDS_PER_BLOCK[errorCorrectionLevel.ordinal()][version]; + int rawCodewords = getNumRawDataModules(version) / 8; + int numShortBlocks = numBlocks - rawCodewords % numBlocks; + int shortBlockLen = rawCodewords / numBlocks; + + // Split data into blocks and append ECC to each block + byte[][] blocks = new byte[numBlocks][]; + byte[] rsDiv = reedSolomonComputeDivisor(blockEccLen); + for (int i = 0, k = 0; i < numBlocks; i++) { + byte[] dat = Arrays.copyOfRange(data, k, k + shortBlockLen - blockEccLen + (i < numShortBlocks ? 0 : 1)); + k += dat.length; + byte[] block = Arrays.copyOf(dat, shortBlockLen + 1); + byte[] ecc = reedSolomonComputeRemainder(dat, rsDiv); + System.arraycopy(ecc, 0, block, block.length - blockEccLen, ecc.length); + blocks[i] = block; + } + + // Interleave (not concatenate) the bytes from every block into a single sequence + byte[] result = new byte[rawCodewords]; + for (int i = 0, k = 0; i < blocks[0].length; i++) { + for (int j = 0; j < blocks.length; j++) { + // Skip the padding byte in short blocks + if (i != shortBlockLen - blockEccLen || j >= numShortBlocks) { + result[k] = blocks[j][i]; + k++; + } + } + } + return result; + } + + + // Draws the given sequence of 8-bit codewords (data and error correction) onto the entire + // data area of this QR Code. Function modules need to be marked off before this is called. + private void drawCodewords(byte[] data) { + Objects.requireNonNull(data); + if (data.length != getNumRawDataModules(version) / 8) + throw new IllegalArgumentException(); + + int i = 0; // Bit index into the data + // Do the funny zigzag scan + for (int right = size - 1; right >= 1; right -= 2) { // Index of right column in each column pair + if (right == 6) + right = 5; + for (int vert = 0; vert < size; vert++) { // Vertical counter + for (int j = 0; j < 2; j++) { + int x = right - j; // Actual x coordinate + boolean upward = ((right + 1) & 2) == 0; + int y = upward ? size - 1 - vert : vert; // Actual y coordinate + if (!isFunction[y][x] && i < data.length * 8) { + modules[y][x] = getBit(data[i >>> 3], 7 - (i & 7)); + i++; + } + // If this QR Code has any remainder bits (0 to 7), they were assigned as + // 0/false/light by the constructor and are left unchanged by this method + } + } + } + assert i == data.length * 8; + } + + + // XORs the codeword modules in this QR Code with the given mask pattern. + // The function modules must be marked and the codeword bits must be drawn + // before masking. Due to the arithmetic of XOR, calling applyMask() with + // the same mask value a second time will undo the mask. A final well-formed + // QR Code needs exactly one (not zero, two, etc.) mask applied. + private void applyMask(int msk) { + if (msk < 0 || msk > 7) + throw new IllegalArgumentException("Mask value out of range"); + for (int y = 0; y < size; y++) { + for (int x = 0; x < size; x++) { + boolean invert; + switch (msk) { + case 0: + invert = (x + y) % 2 == 0; + break; + case 1: + invert = y % 2 == 0; + break; + case 2: + invert = x % 3 == 0; + break; + case 3: + invert = (x + y) % 3 == 0; + break; + case 4: + invert = (x / 3 + y / 2) % 2 == 0; + break; + case 5: + invert = x * y % 2 + x * y % 3 == 0; + break; + case 6: + invert = (x * y % 2 + x * y % 3) % 2 == 0; + break; + case 7: + invert = ((x + y) % 2 + x * y % 3) % 2 == 0; + break; + default: + throw new AssertionError(); + } + modules[y][x] ^= invert & !isFunction[y][x]; + } + } + } + + + // Calculates and returns the penalty score based on state of this QR Code's current modules. + // This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score. + private int getPenaltyScore() { + int result = 0; + + // Adjacent modules in row having same color, and finder-like patterns + for (int y = 0; y < size; y++) { + boolean runColor = false; + int runX = 0; + int[] runHistory = new int[7]; + for (int x = 0; x < size; x++) { + if (modules[y][x] == runColor) { + runX++; + if (runX == 5) + result += PENALTY_N1; + else if (runX > 5) + result++; + } else { + finderPenaltyAddHistory(runX, runHistory); + if (!runColor) + result += finderPenaltyCountPatterns(runHistory) * PENALTY_N3; + runColor = modules[y][x]; + runX = 1; + } + } + result += finderPenaltyTerminateAndCount(runColor, runX, runHistory) * PENALTY_N3; + } + // Adjacent modules in column having same color, and finder-like patterns + for (int x = 0; x < size; x++) { + boolean runColor = false; + int runY = 0; + int[] runHistory = new int[7]; + for (int y = 0; y < size; y++) { + if (modules[y][x] == runColor) { + runY++; + if (runY == 5) + result += PENALTY_N1; + else if (runY > 5) + result++; + } else { + finderPenaltyAddHistory(runY, runHistory); + if (!runColor) + result += finderPenaltyCountPatterns(runHistory) * PENALTY_N3; + runColor = modules[y][x]; + runY = 1; + } + } + result += finderPenaltyTerminateAndCount(runColor, runY, runHistory) * PENALTY_N3; + } + + // 2*2 blocks of modules having same color + for (int y = 0; y < size - 1; y++) { + for (int x = 0; x < size - 1; x++) { + boolean color = modules[y][x]; + if (color == modules[y][x + 1] && + color == modules[y + 1][x] && + color == modules[y + 1][x + 1]) + result += PENALTY_N2; + } + } + + // Balance of dark and light modules + int dark = 0; + for (boolean[] row : modules) { + for (boolean color : row) { + if (color) + dark++; + } + } + int total = size * size; // Note that size is odd, so dark/total != 1/2 + // Compute the smallest integer k >= 0 such that (45-5k)% <= dark/total <= (55+5k)% + int k = (Math.abs(dark * 20 - total * 10) + total - 1) / total - 1; + assert 0 <= k && k <= 9; + result += k * PENALTY_N4; + assert 0 <= result && result <= 2568888; // Non-tight upper bound based on default values of PENALTY_N1, ..., N4 + return result; + } + + + + /*---- Private helper functions ----*/ + + // Returns an ascending list of positions of alignment patterns for this version number. + // Each position is in the range [0,177), and are used on both the x and y axes. + // This could be implemented as lookup table of 40 variable-length lists of unsigned bytes. + private int[] getAlignmentPatternPositions() { + if (version == 1) + return new int[]{}; + else { + int numAlign = version / 7 + 2; + int step; + if (version == 32) // Special snowflake + step = 26; + else // step = ceil[(size - 13) / (numAlign * 2 - 2)] * 2 + step = (version * 4 + numAlign * 2 + 1) / (numAlign * 2 - 2) * 2; + int[] result = new int[numAlign]; + result[0] = 6; + for (int i = result.length - 1, pos = size - 7; i >= 1; i--, pos -= step) + result[i] = pos; + return result; + } + } + + + // Returns the number of data bits that can be stored in a QR Code of the given version number, after + // all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8. + // The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table. + private static int getNumRawDataModules(int ver) { + if (ver < MIN_VERSION || ver > MAX_VERSION) + throw new IllegalArgumentException("Version number out of range"); + + int size = ver * 4 + 17; + int result = size * size; // Number of modules in the whole QR Code square + result -= 8 * 8 * 3; // Subtract the three finders with separators + result -= 15 * 2 + 1; // Subtract the format information and dark module + result -= (size - 16) * 2; // Subtract the timing patterns (excluding finders) + // The five lines above are equivalent to: int result = (16 * ver + 128) * ver + 64; + if (ver >= 2) { + int numAlign = ver / 7 + 2; + result -= (numAlign - 1) * (numAlign - 1) * 25; // Subtract alignment patterns not overlapping with timing patterns + result -= (numAlign - 2) * 2 * 20; // Subtract alignment patterns that overlap with timing patterns + // The two lines above are equivalent to: result -= (25 * numAlign - 10) * numAlign - 55; + if (ver >= 7) + result -= 6 * 3 * 2; // Subtract version information + } + assert 208 <= result && result <= 29648; + return result; + } + + + // Returns a Reed-Solomon ECC generator polynomial for the given degree. This could be + // implemented as a lookup table over all possible parameter values, instead of as an algorithm. + private static byte[] reedSolomonComputeDivisor(int degree) { + if (degree < 1 || degree > 255) + throw new IllegalArgumentException("Degree out of range"); + // Polynomial coefficients are stored from highest to lowest power, excluding the leading term which is always 1. + // For example the polynomial x^3 + 255x^2 + 8x + 93 is stored as the uint8 array {255, 8, 93}. + byte[] result = new byte[degree]; + result[degree - 1] = 1; // Start off with the monomial x^0 + + // Compute the product polynomial (x - r^0) * (x - r^1) * (x - r^2) * ... * (x - r^{degree-1}), + // and drop the highest monomial term which is always 1x^degree. + // Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D). + int root = 1; + for (int i = 0; i < degree; i++) { + // Multiply the current product by (x - r^i) + for (int j = 0; j < result.length; j++) { + result[j] = (byte) reedSolomonMultiply(result[j] & 0xFF, root); + if (j + 1 < result.length) + result[j] ^= result[j + 1]; + } + root = reedSolomonMultiply(root, 0x02); + } + return result; + } + + + // Returns the Reed-Solomon error correction codeword for the given data and divisor polynomials. + private static byte[] reedSolomonComputeRemainder(byte[] data, byte[] divisor) { + Objects.requireNonNull(data); + Objects.requireNonNull(divisor); + byte[] result = new byte[divisor.length]; + for (byte b : data) { // Polynomial division + int factor = (b ^ result[0]) & 0xFF; + System.arraycopy(result, 1, result, 0, result.length - 1); + result[result.length - 1] = 0; + for (int i = 0; i < result.length; i++) + result[i] ^= reedSolomonMultiply(divisor[i] & 0xFF, factor); + } + return result; + } + + + // Returns the product of the two given field elements modulo GF(2^8/0x11D). The arguments and result + // are unsigned 8-bit integers. This could be implemented as a lookup table of 256*256 entries of uint8. + private static int reedSolomonMultiply(int x, int y) { + assert x >> 8 == 0 && y >> 8 == 0; + // Russian peasant multiplication + int z = 0; + for (int i = 7; i >= 0; i--) { + z = (z << 1) ^ ((z >>> 7) * 0x11D); + z ^= ((y >>> i) & 1) * x; + } + assert z >>> 8 == 0; + return z; + } + + + // Returns the number of 8-bit data (i.e. not error correction) codewords contained in any + // QR Code of the given version number and error correction level, with remainder bits discarded. + // This stateless pure function could be implemented as a (40*4)-cell lookup table. + static int getNumDataCodewords(int ver, Ecc ecl) { + return getNumRawDataModules(ver) / 8 + - ECC_CODEWORDS_PER_BLOCK[ecl.ordinal()][ver] + * NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal()][ver]; + } + + + // Can only be called immediately after a light run is added, and + // returns either 0, 1, or 2. A helper function for getPenaltyScore(). + private int finderPenaltyCountPatterns(int[] runHistory) { + int n = runHistory[1]; + assert n <= size * 3; + boolean core = n > 0 && runHistory[2] == n && runHistory[3] == n * 3 && runHistory[4] == n && runHistory[5] == n; + return (core && runHistory[0] >= n * 4 && runHistory[6] >= n ? 1 : 0) + + (core && runHistory[6] >= n * 4 && runHistory[0] >= n ? 1 : 0); + } + + + // Must be called at the end of a line (row or column) of modules. A helper function for getPenaltyScore(). + private int finderPenaltyTerminateAndCount(boolean currentRunColor, int currentRunLength, int[] runHistory) { + if (currentRunColor) { // Terminate dark run + finderPenaltyAddHistory(currentRunLength, runHistory); + currentRunLength = 0; + } + currentRunLength += size; // Add light border to final run + finderPenaltyAddHistory(currentRunLength, runHistory); + return finderPenaltyCountPatterns(runHistory); + } + + + // Pushes the given value to the front and drops the last value. A helper function for getPenaltyScore(). + private void finderPenaltyAddHistory(int currentRunLength, int[] runHistory) { + if (runHistory[0] == 0) + currentRunLength += size; // Add light border to initial run + System.arraycopy(runHistory, 0, runHistory, 1, runHistory.length - 1); + runHistory[0] = currentRunLength; + } + + + // Returns true iff the i'th bit of x is set to 1. + static boolean getBit(int x, int i) { + return ((x >>> i) & 1) != 0; + } + + + /*---- Constants and tables ----*/ + + /** + * The minimum version number (1) supported in the QR Code Model 2 standard. + */ + public static final int MIN_VERSION = 1; + + /** + * The maximum version number (40) supported in the QR Code Model 2 standard. + */ + public static final int MAX_VERSION = 40; + + + // For use in getPenaltyScore(), when evaluating which mask is best. + private static final int PENALTY_N1 = 3; + private static final int PENALTY_N2 = 3; + private static final int PENALTY_N3 = 40; + private static final int PENALTY_N4 = 10; + + + private static final byte[][] ECC_CODEWORDS_PER_BLOCK = { + // Version: (note that index 0 is for padding, and is set to an illegal value) + //0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level + {-1, 7, 10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28, 28, 28, 30, 30, 26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Low + {-1, 10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26, 26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28}, // Medium + {-1, 13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30, 28, 30, 30, 30, 30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Quartile + {-1, 17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28, 30, 24, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // High + }; + + private static final byte[][] NUM_ERROR_CORRECTION_BLOCKS = { + // Version: (note that index 0 is for padding, and is set to an illegal value) + //0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level + {-1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 12, 12, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25}, // Low + {-1, 1, 1, 1, 2, 2, 4, 4, 4, 5, 5, 5, 8, 9, 9, 10, 10, 11, 13, 14, 16, 17, 17, 18, 20, 21, 23, 25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49}, // Medium + {-1, 1, 1, 2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 12, 16, 12, 17, 16, 18, 21, 20, 23, 23, 25, 27, 29, 34, 34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68}, // Quartile + {-1, 1, 1, 2, 4, 4, 4, 5, 6, 8, 8, 11, 11, 16, 16, 18, 16, 19, 21, 25, 25, 25, 34, 30, 32, 35, 37, 40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81}, // High + }; + + + + /*---- Public helper enumeration ----*/ + + /** + * The error correction level in a QR Code symbol. + */ + public enum Ecc { + // Must be declared in ascending order of error protection + // so that the implicit ordinal() and values() work properly + /** + * The QR Code can tolerate about 7% erroneous codewords. + */ + LOW(1), + /** + * The QR Code can tolerate about 15% erroneous codewords. + */ + MEDIUM(0), + /** + * The QR Code can tolerate about 25% erroneous codewords. + */ + QUARTILE(3), + /** + * The QR Code can tolerate about 30% erroneous codewords. + */ + HIGH(2); + + // In the range 0 to 3 (unsigned 2-bit integer). + final int formatBits; + + // Constructor. + private Ecc(int fb) { + formatBits = fb; + } + } + +} diff --git a/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegment.java b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegment.java new file mode 100644 index 0000000..3d9061f --- /dev/null +++ b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegment.java @@ -0,0 +1,330 @@ +/* + * QR Code generator library (Java) + * + * Copyright (c) Project Nayuki. (MIT License) + * https://www.nayuki.io/page/qr-code-generator-library + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * - The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * - The Software is provided "as is", without warranty of any kind, express or + * implied, including but not limited to the warranties of merchantability, + * fitness for a particular purpose and noninfringement. In no event shall the + * authors or copyright holders be liable for any claim, damages or other + * liability, whether in an action of contract, tort or otherwise, arising from, + * out of or in connection with the Software or the use or other dealings in the + * Software. + */ + +package ru.ra66it.qrcodegenerator; + +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; +import java.util.List; +import java.util.Objects; +import java.util.regex.Pattern; + + +/** + * A segment of character/binary/control data in a QR Code symbol. + * Instances of this class are immutable. + *

The mid-level way to create a segment is to take the payload data and call a + * static factory function such as {@link QrSegment#makeNumeric(CharSequence)}. The low-level + * way to create a segment is to custom-make the bit buffer and call the {@link + * QrSegment#QrSegment(Mode, int, BitBuffer) constructor} with appropriate values.

+ *

This segment class imposes no length restrictions, but QR Codes have restrictions. + * Even in the most favorable conditions, a QR Code can only hold 7089 characters of data. + * Any segment longer than this is meaningless for the purpose of generating QR Codes. + * This class can represent kanji mode segments, but provides no help in encoding them + * - see {@link QrSegmentAdvanced} for full kanji support.

+ */ +public final class QrSegment { + + /*---- Static factory functions (mid level) ----*/ + + /** + * Returns a segment representing the specified binary data + * encoded in byte mode. All input byte arrays are acceptable. + *

Any text string can be converted to UTF-8 bytes ({@code + * s.getBytes(StandardCharsets.UTF_8)}) and encoded as a byte mode segment.

+ * + * @param data the binary data (not {@code null}) + * @return a segment (not {@code null}) containing the data + * @throws NullPointerException if the array is {@code null} + */ + public static QrSegment makeBytes(byte[] data) { + Objects.requireNonNull(data); + BitBuffer bb = new BitBuffer(); + for (byte b : data) + bb.appendBits(b & 0xFF, 8); + return new QrSegment(Mode.BYTE, data.length, bb); + } + + + /** + * Returns a segment representing the specified string of decimal digits encoded in numeric mode. + * + * @param digits the text (not {@code null}), with only digits from 0 to 9 allowed + * @return a segment (not {@code null}) containing the text + * @throws NullPointerException if the string is {@code null} + * @throws IllegalArgumentException if the string contains non-digit characters + */ + public static QrSegment makeNumeric(CharSequence digits) { + Objects.requireNonNull(digits); + if (!isNumeric(digits)) + throw new IllegalArgumentException("String contains non-numeric characters"); + + BitBuffer bb = new BitBuffer(); + for (int i = 0; i < digits.length(); ) { // Consume up to 3 digits per iteration + int n = Math.min(digits.length() - i, 3); + bb.appendBits(Integer.parseInt(digits.subSequence(i, i + n).toString()), n * 3 + 1); + i += n; + } + return new QrSegment(Mode.NUMERIC, digits.length(), bb); + } + + + /** + * Returns a segment representing the specified text string encoded in alphanumeric mode. + * The characters allowed are: 0 to 9, A to Z (uppercase only), space, + * dollar, percent, asterisk, plus, hyphen, period, slash, colon. + * + * @param text the text (not {@code null}), with only certain characters allowed + * @return a segment (not {@code null}) containing the text + * @throws NullPointerException if the string is {@code null} + * @throws IllegalArgumentException if the string contains non-encodable characters + */ + public static QrSegment makeAlphanumeric(CharSequence text) { + Objects.requireNonNull(text); + if (!isAlphanumeric(text)) + throw new IllegalArgumentException("String contains unencodable characters in alphanumeric mode"); + + BitBuffer bb = new BitBuffer(); + int i; + for (i = 0; i <= text.length() - 2; i += 2) { // Process groups of 2 + int temp = ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)) * 45; + temp += ALPHANUMERIC_CHARSET.indexOf(text.charAt(i + 1)); + bb.appendBits(temp, 11); + } + if (i < text.length()) // 1 character remaining + bb.appendBits(ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)), 6); + return new QrSegment(Mode.ALPHANUMERIC, text.length(), bb); + } + + + /** + * Returns a list of zero or more segments to represent the specified Unicode text string. + * The result may use various segment modes and switch modes to optimize the length of the bit stream. + * + * @param text the text to be encoded, which can be any Unicode string + * @return a new mutable list (not {@code null}) of segments (not {@code null}) containing the text + * @throws NullPointerException if the text is {@code null} + */ + public static List makeSegments(CharSequence text) { + Objects.requireNonNull(text); + + // Select the most efficient segment encoding automatically + List result = new ArrayList<>(); + if (text.equals("")) ; // Leave result empty + else if (isNumeric(text)) + result.add(makeNumeric(text)); + else if (isAlphanumeric(text)) + result.add(makeAlphanumeric(text)); + else + result.add(makeBytes(text.toString().getBytes(StandardCharsets.UTF_8))); + return result; + } + + + /** + * Returns a segment representing an Extended Channel Interpretation + * (ECI) designator with the specified assignment value. + * + * @param assignVal the ECI assignment number (see the AIM ECI specification) + * @return a segment (not {@code null}) containing the data + * @throws IllegalArgumentException if the value is outside the range [0, 106) + */ + public static QrSegment makeEci(int assignVal) { + BitBuffer bb = new BitBuffer(); + if (assignVal < 0) + throw new IllegalArgumentException("ECI assignment value out of range"); + else if (assignVal < (1 << 7)) + bb.appendBits(assignVal, 8); + else if (assignVal < (1 << 14)) { + bb.appendBits(0b10, 2); + bb.appendBits(assignVal, 14); + } else if (assignVal < 1_000_000) { + bb.appendBits(0b110, 3); + bb.appendBits(assignVal, 21); + } else + throw new IllegalArgumentException("ECI assignment value out of range"); + return new QrSegment(Mode.ECI, 0, bb); + } + + + /** + * Tests whether the specified string can be encoded as a segment in numeric mode. + * A string is encodable iff each character is in the range 0 to 9. + * + * @param text the string to test for encodability (not {@code null}) + * @return {@code true} iff each character is in the range 0 to 9. + * @throws NullPointerException if the string is {@code null} + * @see #makeNumeric(CharSequence) + */ + public static boolean isNumeric(CharSequence text) { + return NUMERIC_REGEX.matcher(text).matches(); + } + + + /** + * Tests whether the specified string can be encoded as a segment in alphanumeric mode. + * A string is encodable iff each character is in the following set: 0 to 9, A to Z + * (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon. + * + * @param text the string to test for encodability (not {@code null}) + * @return {@code true} iff each character is in the alphanumeric mode character set + * @throws NullPointerException if the string is {@code null} + * @see #makeAlphanumeric(CharSequence) + */ + public static boolean isAlphanumeric(CharSequence text) { + return ALPHANUMERIC_REGEX.matcher(text).matches(); + } + + + + /*---- Instance fields ----*/ + + /** + * The mode indicator of this segment. Not {@code null}. + */ + public final Mode mode; + + /** + * The length of this segment's unencoded data. Measured in characters for + * numeric/alphanumeric/kanji mode, bytes for byte mode, and 0 for ECI mode. + * Always zero or positive. Not the same as the data's bit length. + */ + public final int numChars; + + // The data bits of this segment. Not null. Accessed through getData(). + final BitBuffer data; + + + /*---- Constructor (low level) ----*/ + + /** + * Constructs a QR Code segment with the specified attributes and data. + * The character count (numCh) must agree with the mode and the bit buffer length, + * but the constraint isn't checked. The specified bit buffer is cloned and stored. + * + * @param md the mode (not {@code null}) + * @param numCh the data length in characters or bytes, which is non-negative + * @param data the data bits (not {@code null}) + * @throws NullPointerException if the mode or data is {@code null} + * @throws IllegalArgumentException if the character count is negative + */ + public QrSegment(Mode md, int numCh, BitBuffer data) { + mode = Objects.requireNonNull(md); + Objects.requireNonNull(data); + if (numCh < 0) + throw new IllegalArgumentException("Invalid value"); + numChars = numCh; + this.data = data.clone(); // Make defensive copy + } + + + /*---- Methods ----*/ + + /** + * Returns the data bits of this segment. + * + * @return a new copy of the data bits (not {@code null}) + */ + public BitBuffer getData() { + return data.clone(); // Make defensive copy + } + + + // Calculates the number of bits needed to encode the given segments at the given version. + // Returns a non-negative number if successful. Otherwise returns -1 if a segment has too + // many characters to fit its length field, or the total bits exceeds Integer.MAX_VALUE. + static int getTotalBits(List segs, int version) { + Objects.requireNonNull(segs); + long result = 0; + for (QrSegment seg : segs) { + Objects.requireNonNull(seg); + int ccbits = seg.mode.numCharCountBits(version); + if (seg.numChars >= (1 << ccbits)) + return -1; // The segment's length doesn't fit the field's bit width + result += 4L + ccbits + seg.data.bitLength(); + if (result > Integer.MAX_VALUE) + return -1; // The sum will overflow an int type + } + return (int) result; + } + + + /*---- Constants ----*/ + + // Describes precisely all strings that are encodable in numeric mode. + private static final Pattern NUMERIC_REGEX = Pattern.compile("[0-9]*"); + + // Describes precisely all strings that are encodable in alphanumeric mode. + private static final Pattern ALPHANUMERIC_REGEX = Pattern.compile("[A-Z0-9 $%*+./:-]*"); + + // The set of all legal characters in alphanumeric mode, where + // each character value maps to the index in the string. + static final String ALPHANUMERIC_CHARSET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:"; + + + + /*---- Public helper enumeration ----*/ + + /** + * Describes how a segment's data bits are interpreted. + */ + public enum Mode { + + /*-- Constants --*/ + + NUMERIC(0x1, 10, 12, 14), + ALPHANUMERIC(0x2, 9, 11, 13), + BYTE(0x4, 8, 16, 16), + KANJI(0x8, 8, 10, 12), + ECI(0x7, 0, 0, 0); + + + /*-- Fields --*/ + + // The mode indicator bits, which is a uint4 value (range 0 to 15). + final int modeBits; + + // Number of character count bits for three different version ranges. + private final int[] numBitsCharCount; + + + /*-- Constructor --*/ + + private Mode(int mode, int... ccbits) { + modeBits = mode; + numBitsCharCount = ccbits; + } + + + /*-- Method --*/ + + // Returns the bit width of the character count field for a segment in this mode + // in a QR Code at the given version number. The result is in the range [0, 16]. + int numCharCountBits(int ver) { + assert QrCode.MIN_VERSION <= ver && ver <= QrCode.MAX_VERSION; + return numBitsCharCount[(ver + 7) / 17]; + } + + } + +} diff --git a/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegmentAdvanced.java b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegmentAdvanced.java new file mode 100644 index 0000000..62f32fc --- /dev/null +++ b/android/qrcodegen/src/main/java/ru/ra66it/qrcodegenerator/QrSegmentAdvanced.java @@ -0,0 +1,460 @@ +/* + * QR Code generator library - Optional advanced logic (Java) + * + * Copyright (c) Project Nayuki. (MIT License) + * https://www.nayuki.io/page/qr-code-generator-library + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * - The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * - The Software is provided "as is", without warranty of any kind, express or + * implied, including but not limited to the warranties of merchantability, + * fitness for a particular purpose and noninfringement. In no event shall the + * authors or copyright holders be liable for any claim, damages or other + * liability, whether in an action of contract, tort or otherwise, arising from, + * out of or in connection with the Software or the use or other dealings in the + * Software. + */ + +package ru.ra66it.qrcodegenerator; + +import android.util.Base64; + +import java.nio.charset.StandardCharsets; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import java.util.Objects; + +import ru.ra66it.qrcodegenerator.QrSegment.Mode; + + +/** + * Splits text into optimal segments and encodes kanji segments. + * Provides static functions only; not instantiable. + * + * @see QrSegment + * @see QrCode + */ +public final class QrSegmentAdvanced { + + /*---- Optimal list of segments encoder ----*/ + + /** + * Returns a list of zero or more segments to represent the specified Unicode text string. + * The resulting list optimally minimizes the total encoded bit length, subjected to the constraints + * in the specified {error correction level, minimum version number, maximum version number}. + *

This function can utilize all four text encoding modes: numeric, alphanumeric, byte (UTF-8), + * and kanji. This can be considered as a sophisticated but slower replacement for {@link + * QrSegment#makeSegments(CharSequence)}. This requires more input parameters because it searches a + * range of versions, like {@link QrCode#encodeSegments(List, QrCode.Ecc, int, int, int, boolean)}.

+ * + * @param text the text to be encoded (not {@code null}), which can be any Unicode string + * @param ecl the error correction level to use (not {@code null}) + * @param minVersion the minimum allowed version of the QR Code (at least 1) + * @param maxVersion the maximum allowed version of the QR Code (at most 40) + * @return a new mutable list (not {@code null}) of segments (not {@code null}) + * containing the text, minimizing the bit length with respect to the constraints + * @throws NullPointerException if the text or error correction level is {@code null} + * @throws IllegalArgumentException if 1 ≤ minVersion ≤ maxVersion ≤ 40 is violated + * @throws DataTooLongException if the text fails to fit in the maxVersion QR Code at the ECL + */ + public static List makeSegmentsOptimally(String text, QrCode.Ecc ecl, int minVersion, int maxVersion) { + // Check arguments + Objects.requireNonNull(text); + Objects.requireNonNull(ecl); + if (!(QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= QrCode.MAX_VERSION)) + throw new IllegalArgumentException("Invalid value"); + + // Iterate through version numbers, and make tentative segments + List segs = null; + int[] codePoints = toCodePoints(text); + for (int version = minVersion; ; version++) { + if (version == minVersion || version == 10 || version == 27) + segs = makeSegmentsOptimally(codePoints, version); + assert segs != null; + + // Check if the segments fit + int dataCapacityBits = QrCode.getNumDataCodewords(version, ecl) * 8; // Number of data bits available + int dataUsedBits = QrSegment.getTotalBits(segs, version); + if (dataUsedBits != -1 && dataUsedBits <= dataCapacityBits) + return segs; // This version number is found to be suitable + if (version >= maxVersion) { // All versions in the range could not fit the given text + String msg = "Segment too long"; + if (dataUsedBits != -1) + msg = String.format("Data length = %d bits, Max capacity = %d bits", dataUsedBits, dataCapacityBits); + throw new DataTooLongException(msg); + } + } + } + + + // Returns a new list of segments that is optimal for the given text at the given version number. + private static List makeSegmentsOptimally(int[] codePoints, int version) { + if (codePoints.length == 0) + return new ArrayList<>(); + Mode[] charModes = computeCharacterModes(codePoints, version); + return splitIntoSegments(codePoints, charModes); + } + + + // Returns a new array representing the optimal mode per code point based on the given text and version. + private static Mode[] computeCharacterModes(int[] codePoints, int version) { + if (codePoints.length == 0) + throw new IllegalArgumentException(); + if (codePoints.length > 7089) // Upper bound is the number of characters that fit in QR Code version 40, low error correction, numeric mode + throw new DataTooLongException("String too long"); + final Mode[] modeTypes = {Mode.BYTE, Mode.ALPHANUMERIC, Mode.NUMERIC, Mode.KANJI}; // Do not modify + final int numModes = modeTypes.length; + + // Segment header sizes, measured in 1/6 bits + final int[] headCosts = new int[numModes]; + for (int i = 0; i < numModes; i++) { + headCosts[i] = (4 + modeTypes[i].numCharCountBits(version)) * 6; + assert 0 <= headCosts[i] && headCosts[i] <= (4 + 16) * 6; + } + + // charModes[i][j] represents the mode to encode the code point at + // index i such that the final segment ends in modeTypes[j] and the + // total number of bits is minimized over all possible choices + Mode[][] charModes = new Mode[codePoints.length][numModes]; + + // At the beginning of each iteration of the loop below, + // prevCosts[j] is the exact minimum number of 1/6 bits needed to + // encode the entire string prefix of length i, and end in modeTypes[j] + int[] prevCosts = headCosts.clone(); + + // Calculate costs using dynamic programming + for (int i = 0; i < codePoints.length; i++) { + int c = codePoints[i]; + int[] curCosts = new int[numModes]; + { // Always extend a byte mode segment + curCosts[0] = prevCosts[0] + countUtf8Bytes(c) * 8 * 6; + charModes[i][0] = modeTypes[0]; + } + // Extend a segment if possible + if (QrSegment.ALPHANUMERIC_CHARSET.indexOf(c) != -1) { // Is alphanumeric + curCosts[1] = prevCosts[1] + 33; // 5.5 bits per alphanumeric char + charModes[i][1] = modeTypes[1]; + } + if ('0' <= c && c <= '9') { // Is numeric + curCosts[2] = prevCosts[2] + 20; // 3.33 bits per digit + charModes[i][2] = modeTypes[2]; + } + if (isKanji(c)) { + curCosts[3] = prevCosts[3] + 78; // 13 bits per Shift JIS char + charModes[i][3] = modeTypes[3]; + } + + // Start new segment at the end to switch modes + for (int j = 0; j < numModes; j++) { // To mode + for (int k = 0; k < numModes; k++) { // From mode + int newCost = (curCosts[k] + 5) / 6 * 6 + headCosts[j]; + if (charModes[i][k] != null && (charModes[i][j] == null || newCost < curCosts[j])) { + curCosts[j] = newCost; + charModes[i][j] = modeTypes[k]; + } + } + } + + // A non-tight upper bound is when each of 7089 characters switches to + // byte mode (4-bit header + 16-bit count) and requires 4 bytes in UTF-8 + for (int cost : curCosts) + assert 0 <= cost && cost <= (4 + 16 + 32) * 6 * 7089; + prevCosts = curCosts; + } + + // Find optimal ending mode + Mode curMode = null; + for (int i = 0, minCost = 0; i < numModes; i++) { + if (curMode == null || prevCosts[i] < minCost) { + minCost = prevCosts[i]; + curMode = modeTypes[i]; + } + } + + // Get optimal mode for each code point by tracing backwards + Mode[] result = new Mode[charModes.length]; + for (int i = result.length - 1; i >= 0; i--) { + for (int j = 0; j < numModes; j++) { + if (modeTypes[j] == curMode) { + curMode = charModes[i][j]; + result[i] = curMode; + break; + } + } + } + return result; + } + + + // Returns a new list of segments based on the given text and modes, such that + // consecutive code points in the same mode are put into the same segment. + private static List splitIntoSegments(int[] codePoints, Mode[] charModes) { + if (codePoints.length == 0) + throw new IllegalArgumentException(); + List result = new ArrayList<>(); + + // Accumulate run of modes + Mode curMode = charModes[0]; + int start = 0; + for (int i = 1; ; i++) { + if (i < codePoints.length && charModes[i] == curMode) + continue; + String s = new String(codePoints, start, i - start); + if (curMode == Mode.BYTE) + result.add(QrSegment.makeBytes(s.getBytes(StandardCharsets.UTF_8))); + else if (curMode == Mode.NUMERIC) + result.add(QrSegment.makeNumeric(s)); + else if (curMode == Mode.ALPHANUMERIC) + result.add(QrSegment.makeAlphanumeric(s)); + else if (curMode == Mode.KANJI) + result.add(makeKanji(s)); + else + throw new AssertionError(); + if (i >= codePoints.length) + return result; + curMode = charModes[i]; + start = i; + } + } + + + // Returns a new array of Unicode code points (effectively + // UTF-32 / UCS-4) representing the given UTF-16 string. + private static int[] toCodePoints(String s) { + int[] result = new int[s.length()]; + + final int length = s.length(); + for (int offset = 0; offset < length; ) { + final int codepoint = s.codePointAt(offset); + + // do something with the codepoint + + offset += Character.charCount(codepoint); + } + for (int c : result) { + if (Character.isSurrogate((char) c)) + throw new IllegalArgumentException("Invalid UTF-16 string"); + } + return result; + } + + + // Returns the number of UTF-8 bytes needed to encode the given Unicode code point. + private static int countUtf8Bytes(int cp) { + if (cp < 0) throw new IllegalArgumentException("Invalid code point"); + else if (cp < 0x80) return 1; + else if (cp < 0x800) return 2; + else if (cp < 0x10000) return 3; + else if (cp < 0x110000) return 4; + else throw new IllegalArgumentException("Invalid code point"); + } + + + + /*---- Kanji mode segment encoder ----*/ + + /** + * Returns a segment representing the specified text string encoded in kanji mode. + * Broadly speaking, the set of encodable characters are {kanji used in Japan, + * hiragana, katakana, East Asian punctuation, full-width ASCII, Greek, Cyrillic}. + * Examples of non-encodable characters include {ordinary ASCII, half-width katakana, + * more extensive Chinese hanzi}. + * + * @param text the text (not {@code null}), with only certain characters allowed + * @return a segment (not {@code null}) containing the text + * @throws NullPointerException if the string is {@code null} + * @throws IllegalArgumentException if the string contains non-encodable characters + * @see #isEncodableAsKanji(String) + */ + public static QrSegment makeKanji(String text) { + Objects.requireNonNull(text); + BitBuffer bb = new BitBuffer(); + + char[] chars = text.toString().toCharArray(); + + for (char c : chars) { + int val = UNICODE_TO_QR_KANJI[c]; + if (val == -1) + throw new IllegalArgumentException("String contains non-kanji-mode characters"); + bb.appendBits(val, 13); + } + + return new QrSegment(Mode.KANJI, text.length(), bb); + } + + + /** + * Tests whether the specified string can be encoded as a segment in kanji mode. + * Broadly speaking, the set of encodable characters are {kanji used in Japan, + * hiragana, katakana, East Asian punctuation, full-width ASCII, Greek, Cyrillic}. + * Examples of non-encodable characters include {ordinary ASCII, half-width katakana, + * more extensive Chinese hanzi}. + * + * @param text the string to test for encodability (not {@code null}) + * @return {@code true} iff each character is in the kanji mode character set + * @throws NullPointerException if the string is {@code null} + * @see #makeKanji(String) + */ + public static boolean isEncodableAsKanji(String text) { + Objects.requireNonNull(text); + + boolean isEncodable = true; + for (char c : text.toCharArray()) { + if (!isKanji(c)) { + isEncodable = false; + break; + } + } + + return isEncodable; + } + + + private static boolean isKanji(int c) { + return c < UNICODE_TO_QR_KANJI.length && UNICODE_TO_QR_KANJI[c] != -1; + } + + + // Data derived from ftp://ftp.unicode.org/Public/MAPPINGS/OBSOLETE/EASTASIA/JIS/SHIFTJIS.TXT + private static final String PACKED_QR_KANJI_TO_UNICODE = + "MAAwATAC/wz/DjD7/xr/G/8f/wEwmzCcALT/QACo/z7/4/8/MP0w/jCdMJ4wA07dMAUwBjAHMPwgFSAQ/w8AXDAcIBb/XCAmICUgGCAZIBwgHf8I/wkwFDAV/zv/Pf9b/10wCDAJMAowCzAMMA0wDjAPMBAwEf8LIhIAsQDX//8A9/8dImD/HP8eImYiZyIeIjQmQiZA" + + "ALAgMiAzIQP/5f8EAKIAo/8F/wP/Bv8K/yAApyYGJgUlyyXPJc4lxyXGJaEloCWzJbIlvSW8IDswEiGSIZAhkSGTMBP/////////////////////////////IggiCyKGIocigiKDIioiKf////////////////////8iJyIoAKwh0iHUIgAiA///////////////////" + + "//////////8iICKlIxIiAiIHImEiUiJqImsiGiI9Ih0iNSIrIiz//////////////////yErIDAmbyZtJmogICAhALb//////////yXv/////////////////////////////////////////////////xD/Ef8S/xP/FP8V/xb/F/8Y/xn///////////////////8h" + + "/yL/I/8k/yX/Jv8n/yj/Kf8q/yv/LP8t/y7/L/8w/zH/Mv8z/zT/Nf82/zf/OP85/zr///////////////////9B/0L/Q/9E/0X/Rv9H/0j/Sf9K/0v/TP9N/07/T/9Q/1H/Uv9T/1T/Vf9W/1f/WP9Z/1r//////////zBBMEIwQzBEMEUwRjBHMEgwSTBKMEswTDBN" + + "ME4wTzBQMFEwUjBTMFQwVTBWMFcwWDBZMFowWzBcMF0wXjBfMGAwYTBiMGMwZDBlMGYwZzBoMGkwajBrMGwwbTBuMG8wcDBxMHIwczB0MHUwdjB3MHgweTB6MHswfDB9MH4wfzCAMIEwgjCDMIQwhTCGMIcwiDCJMIowizCMMI0wjjCPMJAwkTCSMJP/////////////" + + "////////////////////////MKEwojCjMKQwpTCmMKcwqDCpMKowqzCsMK0wrjCvMLAwsTCyMLMwtDC1MLYwtzC4MLkwujC7MLwwvTC+ML8wwDDBMMIwwzDEMMUwxjDHMMgwyTDKMMswzDDNMM4wzzDQMNEw0jDTMNQw1TDWMNcw2DDZMNow2zDcMN0w3jDf//8w4DDh" + + "MOIw4zDkMOUw5jDnMOgw6TDqMOsw7DDtMO4w7zDwMPEw8jDzMPQw9TD2/////////////////////wORA5IDkwOUA5UDlgOXA5gDmQOaA5sDnAOdA54DnwOgA6EDowOkA6UDpgOnA6gDqf////////////////////8DsQOyA7MDtAO1A7YDtwO4A7kDugO7A7wDvQO+" + + "A78DwAPBA8MDxAPFA8YDxwPIA8n/////////////////////////////////////////////////////////////////////////////////////////////////////////////BBAEEQQSBBMEFAQVBAEEFgQXBBgEGQQaBBsEHAQdBB4EHwQgBCEEIgQjBCQEJQQm" + + "BCcEKAQpBCoEKwQsBC0ELgQv////////////////////////////////////////BDAEMQQyBDMENAQ1BFEENgQ3BDgEOQQ6BDsEPAQ9//8EPgQ/BEAEQQRCBEMERARFBEYERwRIBEkESgRLBEwETQROBE///////////////////////////////////yUAJQIlDCUQ" + + "JRglFCUcJSwlJCU0JTwlASUDJQ8lEyUbJRclIyUzJSslOyVLJSAlLyUoJTclPyUdJTAlJSU4JUL/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////" + + "////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////" + + "////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////" + + 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"////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////" + + "/////////////////////////////////////////////w=="; + + + private static final short[] UNICODE_TO_QR_KANJI = new short[1 << 16]; + + static { // Unpack the Shift JIS table into a more computation-friendly form + Arrays.fill(UNICODE_TO_QR_KANJI, (short) -1); + byte[] bytes = Base64.decode(PACKED_QR_KANJI_TO_UNICODE, Base64.NO_WRAP); + for (int i = 0; i < bytes.length; i += 2) { + char c = (char) (((bytes[i] & 0xFF) << 8) | (bytes[i + 1] & 0xFF)); + if (c == 0xFFFF) + continue; + assert UNICODE_TO_QR_KANJI[c] == -1; + UNICODE_TO_QR_KANJI[c] = (short) (i / 2); + } + } + + + + /*---- Miscellaneous ----*/ + + private QrSegmentAdvanced() { + } // Not instantiable + +} diff --git a/android/qrcodegen/src/test/java/ru/ra66it/qrcodegenerator/ExampleUnitTest.java b/android/qrcodegen/src/test/java/ru/ra66it/qrcodegenerator/ExampleUnitTest.java new file mode 100644 index 0000000..66ed745 --- /dev/null +++ b/android/qrcodegen/src/test/java/ru/ra66it/qrcodegenerator/ExampleUnitTest.java @@ -0,0 +1,17 @@ +package ru.ra66it.qrcodegenerator; + +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/android/settings.gradle b/android/settings.gradle new file mode 100644 index 0000000..303bd5d --- /dev/null +++ b/android/settings.gradle @@ -0,0 +1,17 @@ +pluginManagement { + repositories { + gradlePluginPortal() + google() + mavenCentral() + } +} +dependencyResolutionManagement { + repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS) + repositories { + google() + mavenCentral() + } +} +rootProject.name = "QRCodeGeneratorExample" +include ':app' +include ':qrcodegen'