.gitignore

@@ -51,6 +51,7 @@ cmake-build-*/
 
 # IntelliJ
 out/
+.idea
 
 # mpeltonen/sbt-idea plugin
 .idea_modules/

.gitlab-ci.yml

-image: gradle:jdk16
+image: openjdk:17-alpine
+
+variables:
+  GRADLE_OPTS: "-Dorg.gradle.daemon=false"
 
 before_script:
   - export GRADLE_USER_HOME=`pwd`/.gradle
@@ -8,12 +11,30 @@ cache:
     - .gradle/wrapper
     - .gradle/caches
 
-package:
+stages:
+  - build
+  - test
+
+build:
   stage: build
-  script:
-    - ./gradlew assemble
+  script: ./gradlew --build-cache assemble
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: push
+    paths:
+      - build
+      - .gradle
 
-test:
+java:
   stage: test
-  script:
-    - ./gradlew check
\ No newline at end of file
+  script: ./gradlew test
+  artifacts:
+    when: always
+    reports:
+      junit: build/test-results/test/**/TEST-*.xml
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: pull
+    paths:
+      - build
+      - .gradle
\ No newline at end of file

README.md

-# Gestion des notes des étudiants
+# Image
 
 ## Description du projet
 
-Le but de ce TP est de créer des classes permettant de représenter des étudiants (classe `Student`), des notes (classe `Grade`), des résultats à une unité d'enseignement (classe `TeachingUnitResult`) et des promotions d'étudiants (classe `Cohort`).
+Ce projet est l'occasion de travailler sur la représentation et la manipulation d'images. Ces images seront constituées de pixels caractérisés par une couleur représentant un niveau de gris.
 
-## Membres du projet
+## Membre du projet
 
-- NOM, prénom, numéro de groupe, du premier participant
-- NOM, prénom, numéro de groupe, du deuxième participant
+- NOM, prénom

build.gradle

+plugins {
+    id 'java'
+    id 'application'
+    id "org.openjfx.javafxplugin" version "0.0.14"
+}
+
+group 'M2_BIO_INFO'
+version '1.0-SNAPSHOT'
+
+javafx {
+    version = "20"
+    modules = [ 'javafx.controls', 'javafx.fxml' ]
+}
+
+repositories {
+    mavenCentral()
+}
+
+test {
+    useJUnitPlatform()
+}
+
+dependencies {
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher") {
+        because("Only needed to run tests in a version of IntelliJ IDEA that bundles older versions")
+    }
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
+    testImplementation("org.assertj:assertj-core:3.24.2")
+    testImplementation("org.junit.jupiter:junit-jupiter:5.10.0")
+}
+
+
+
+application {
+    mainClass.set("Main")
+}

gradle/wrapper/gradle-wrapper.properties

+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

-#!/usr/bin/env sh
+#!/bin/sh
 
 #
-# Copyright 2015 the original author or authors.
+# Copyright © 2015-2021 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,67 +17,101 @@
 #
 
 ##############################################################################
-##
-##  Gradle start up script for UN*X
-##
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
 ##############################################################################
 
 # 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
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
 done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
 
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 # 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"'
+DEFAULT_JVM_OPTS='-Dfile.encoding=UTF-8 "-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
+MAX_FD=maximum
 
 warn () {
     echo "$*"
-}
+} >&2
 
 die () {
     echo
     echo "$*"
     echo
     exit 1
-}
+} >&2
 
 # 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
-    ;;
-  MSYS* | MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
 esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
@@ -87,9 +121,9 @@ CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 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="$JAVA_HOME/jre/sh/java"
+        JAVACMD=$JAVA_HOME/jre/sh/java
     else
-        JAVACMD="$JAVA_HOME/bin/java"
+        JAVACMD=$JAVA_HOME/bin/java
     fi
     if [ ! -x "$JAVACMD" ] ; then
         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
@@ -98,7 +132,7 @@ Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
 else
-    JAVACMD="java"
+    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
@@ -106,80 +140,105 @@ 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: $MAX_FD_LIMIT"
-    fi
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
 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
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
 
 # 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 "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
-        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`="\"$arg\""
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
         fi
-        i=`expr $i + 1`
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
     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;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
 
-# 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"
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
 
 exec "$JAVACMD" "$@"

settings.gradle

+rootProject.name = 'image'
+

src/main/java/ByteGrayColor.java

+import javafx.scene.paint.Color;
+
+/**
+ * Created by Arnaud Labourel on 02/10/2018.
+ */
+
+public class ByteGrayColor implements GrayColor {
+
+    private static final int MINIMUM_GRAY_LEVEL = 0;
+    private static final int MAXIMUM_GRAY_LEVEL = 255;
+    private static final int OPACITY = 1;
+
+    // TODO : add static ByteGrayColors WHITE and BLACK
+
+    private final int grayLevel;
+
+
+    public ByteGrayColor(){
+       this.grayLevel = MINIMUM_GRAY_LEVEL;
+    }
+
+    public ByteGrayColor(int grayLevel) {
+        // TODO : Corriger l'initialisation de la propriété grayLevel de l'instance.
+        this.grayLevel = 0;
+    }
+
+    public ByteGrayColor(double luminosity) {
+        // TODO : Corriger l'initialisation de la propriété grayLevel de l'instance.
+        this.grayLevel = 0;
+    }
+
+    @Override
+    public double getLuminosity() {
+        // TODO : Retourner la luminosité de la couleur (entre 0 noir et 1 blanc)
+        return 0;
+    }
+
+    @Override
+    public Color getColor(){
+        double component = getLuminosity();
+        return new Color(component, component, component, OPACITY);
+    }
+
+
+    @Override
+    public int compareTo(GrayColor o) {
+        // TODO : Retourner la différence de niveau de gris.
+        return 0;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (this.getClass() != o.getClass()) return false;
+        ByteGrayColor color = (ByteGrayColor) o;
+        return grayLevel == color.grayLevel;
+    }
+
+}

src/main/java/Cohort.java

-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * A group of students.
- */
-
-public class Cohort {
-  private final String name;
-  private final List<Student> students;
-
-  /**
-   * Constructs a cohort with a name equals to the specified {@code name} and no students.
-   * @param name the name of the constructed Cohort
-   */
-
-  public Cohort(String name) {
-    this.name = name;
-    this.students = new ArrayList<>();
-  }
-
-  /**
-   * Add the specified {@code student} to the students of the cohort.
-   * @param student the student to be added to the cohort
-   */
-  public void addStudent(Student student){
-    // TODO : add code
-  }
-
-  /**
-   * Returns the list of students of the cohort.
-   * @return the list of students of the cohort.
-   */
-  public List<Student> getStudents(){
-    // TODO : change code
-    return null;
-  }
-
-  /**
-   * Print via the standard output the name of the cohort and all results associated to the students with their average
-   * grade.
-   */
-  public void printStudentsResults(){
-    // TODO : add code
-  }
-
-  /**
-   * Returns the name of the cohort.
-   * @return the name of the cohort
-   */
-  @Override
-  public String toString() {
-    // TODO : change code
-    return null;
-  }
-}

src/main/java/Display.java

+import javafx.fxml.FXML;
+import javafx.fxml.Initializable;
+import javafx.scene.canvas.Canvas;
+import javafx.scene.canvas.GraphicsContext;
+import javafx.scene.image.PixelWriter;
+
+import java.net.URL;
+import java.util.ResourceBundle;
+
+/**
+ * Created by Arnaud Labourel on 04/10/2018.
+ */
+public class Display implements Initializable {
+    @FXML
+    private Canvas canvas;
+
+    MatrixGrayImage image;
+
+    @Override
+    public void initialize(URL location, ResourceBundle resources) {
+
+        this.image = MatrixGrayImage.createImageFromPGMFile("images/luminy.pgm");
+
+        // TODO : Ajouter les transformations d'image.
+
+        render();
+    }
+
+    public void render() {
+        int pixelWidth = image.getWidth();
+        int pixelHeight = image.getHeight();
+
+        canvas.setWidth(pixelWidth);
+        canvas.setHeight(pixelHeight);
+
+        GraphicsContext graphicsContext = canvas.getGraphicsContext2D();
+
+        PixelWriter pixelWriter = graphicsContext.getPixelWriter();
+
+        for (int i = 0; i < pixelWidth; i++) {
+            for (int j = 0; j < pixelHeight; j++) {
+                renderPixel(i,j, pixelWriter);
+            }
+        }
+    }
+
+    private void renderPixel(int x, int y, PixelWriter pixelWriter) {
+        pixelWriter.setColor(x, y, image.getPixelColor(x, y));
+    }
+
+}

src/main/java/Grade.java

-import java.util.List;
-
-/**
- * A grade with a float value comprised between 0 and 20.
- *
- */
-public class Grade {
-  /**
-   * The maximum value of a grade.
-   */
-  private static final int MAXIMUM_GRADE = 20;
-  private final double value;
-
-  /**
-   * Constructs a grade with a value equals to the specified {@code value}.
-   *
-   * @param value the value of the constructed grade
-   */
-
-  public Grade(double value) {
-    this.value = value;
-  }
-
-  /**
-   * Returns the value of the grade as a double.
-   *
-   * @return the value of the grade
-   */
-
-  public double getValue() {
-    // TODO : change code
-    return 0.;
-  }
-
-  /**
-   * Returns a string representation of the grade in the format X.X/20.
-   * @return a string representation of the grade
-   */
-  @Override
-  public String toString() {
-    // TODO : change code
-    return null;
-  }
-
-  /**
-   * Returns a grade with a value equals to the arithmetic mean of the values of the grade in
-   * the specified list.
-   *
-   * @param grades a list of grades
-   * @return a grade corresponding to the mean of grade in {@code grades}
-   */
-  public static Grade averageGrade(List<Grade> grades){
-    // TODO : change code
-    return null;
-  }
-
-  /**
-   * Determines whether or not two grades are equal. Two instances of Grade are equal if the values
-   * of their {@code value} member field are the same.
-   * @param o  an object to be compared with this Grade
-   * @return {@code true} if the object to be compared is an instance of Grade and has the same value; {@code false}
-   * otherwise.
-   */
-  @Override
-  public boolean equals(Object o) {
-    if (this == o) return true;
-    if (o == null || getClass() != o.getClass()) return false;
-
-    Grade grade = (Grade) o;
-
-    return Double.compare(grade.value, value) == 0;
-  }
-
-  /**
-   * Returns a hash code value for the object.
-   * @return a hash code value for this object.
-   */
-  @Override
-  public int hashCode() {
-    long temp = Double.doubleToLongBits(value);
-    return (int) (temp ^ (temp >>> 32));
-  }
-}

src/main/java/GrayColor.java

+import javafx.scene.paint.Color;
+
+/**
+ * Created by Arnaud Labourel on 04/10/2018.
+ * Interface correspondant à une couleur de gris.
+ */
+public interface GrayColor extends Comparable<GrayColor> {
+    double getLuminosity();
+    Color getColor();
+}

src/main/java/GrayImage.java

+/**
+ * Created by Arnaud Labourel on 04/10/2018.
+ */
+
+public interface GrayImage extends Image {
+    void setPixel(GrayColor gray, int x, int y);
+    GrayColor getPixelGrayColor(int x, int y);
+}

src/main/java/Image.java

+import javafx.scene.paint.Color;
+
+/**
+ * Created by Arnaud Labourel on 02/10/2018.
+ */
+public interface Image {
+    Color getPixelColor(int x, int y);
+    int getWidth();
+    int getHeight();
+}

src/main/java/Main.java

-public class Main {
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+
+
+public class Main extends Application
+{
+
     public static void main(String[] args) {
-    // TODO: add code.
+        launch(args);
+    }
+
+    @Override
+    public void start(Stage primaryStage) throws IOException {
+        Parent root =FXMLLoader.load(getClass().getResource("fxml/Display.fxml"));
+        primaryStage.setTitle("Image display");
+        primaryStage.setScene(new Scene(root));
+        primaryStage.show();
+
     }
 }

src/main/java/MatrixGrayImage.java

+import javafx.scene.paint.Color;
+
+import java.io.FileWriter;
+import java.io.InputStream;
+import java.io.PrintWriter;
+import java.util.Scanner;
+
+/**
+ * Created by Arnaud Labourel on 02/10/2018.
+ */
+public class MatrixGrayImage implements GrayImage {
+
+    private final GrayColor[][] pixels;
+    private final int width;
+    private final int height;
+
+
+    @Override
+    public void setPixel(GrayColor gray, int x, int y) {
+        // TODO : Compléter la méthode pour modifier le pixel.
+    }
+
+    @Override
+    public GrayColor getPixelGrayColor(int x, int y) {
+        // TODO : Changer les instructions pour retourner le bon pixel.
+        return new ByteGrayColor();
+    }
+
+    @Override
+    public Color getPixelColor(int x, int y) {
+        // TODO : Changer les instructions pour retourner la couleur du pixel.
+        return Color.WHITE;
+    }
+
+    @Override
+    public int getWidth() {
+        // TODO : Changer les instructions pour retourner la largeur de l'image.
+        return 600;
+    }
+
+    @Override
+    public int getHeight() {
+        // TODO : Changer les instructions pour retourner la hauteur de l'image.
+        return 400;
+    }
+
+    public MatrixGrayImage(int width, int height){
+        /* TODO : Modifier les instructions pour initialiser correctement
+            les propriétés de l'instance.
+         */
+        this.width = 0;
+        this.height = 0;
+        this.pixels = null;
+    }
+
+
+    public static MatrixGrayImage createImageFromPGMFile(String fileName) {
+        // NE PAS MODIFIER !
+        InputStream file = ClassLoader.getSystemResourceAsStream(fileName);
+        Scanner scan = new Scanner(file);
+        scan.nextLine();
+        scan.nextLine();
+
+        int width = scan.nextInt();
+        int height = scan.nextInt();
+
+        MatrixGrayImage result = new MatrixGrayImage(width, height);
+
+        scan.nextInt();
+
+        for(int y = 0; y < height; y++){
+            for(int x = 0; x < width; x++) {
+                GrayColor color = new ByteGrayColor(scan.nextInt());
+                result.setPixel(color, x, y);
+            }
+        }
+
+        return result;
+    }
+
+    public void writeIntoPGMFormat(String fileName){
+        // NE PAS MODIFIER !
+        try {
+            FileWriter fileWriter = new FileWriter(fileName);
+            PrintWriter printWriter = new PrintWriter(fileWriter);
+            printWriter.println("P2");
+            printWriter.println("# CREATOR: TP3 Version 1.0");
+            printWriter.printf("%d %d\n",this.width, this.height);
+
+            printWriter.println(pgmCodeOfGrayColor(pixels[0][0]));
+
+            for(int y = 0; y < height; y++){
+                for(int x = 0; x < width; x++) {
+                    printWriter.println(pgmCodeOfGrayColor(getPixelGrayColor(x,y)));
+                }
+            }
+            printWriter.close();
+        }
+        catch (Exception e){
+            e.printStackTrace();
+        }
+    }
+
+    private static final int PGM_MAXIMUM_CODE = 255;
+
+    private int pgmCodeOfGrayColor(GrayColor pixelGrayColor) {
+        return (int) (pixelGrayColor.getLuminosity() * (double) PGM_MAXIMUM_CODE);
+    }
+}

src/main/java/Student.java

-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * A students with results.
- */
-
-public class Student {
-  private final String firstName;
-  private final String lastName;
-  private final List<TeachingUnitResult> results;
-
-  /**
-   * Constructs a student with the specified first name and last name and no associated results.
-   *
-   * @param firstName the first name of the constructed student
-   * @param lastName the last name of the constructed student
-   */
-
-  public Student(String firstName, String lastName) {
-    this.firstName = firstName;
-    this.lastName = lastName;
-    this.results = new ArrayList<>();
-  }
-
-  /**
-   * Add a grade associated to a teaching unit to the results of the student.
-   *
-   * @param teachingUnitName the name of the teaching unit of the added result
-   * @param grade the grade of the added result
-   */
-  public void addResult(String teachingUnitName, Grade grade){
-    // TODO : add code
-  }
-
-  /**
-   * Returns a string representation of the student in the format first name last name.
-   * @return a string representation of the student
-   */
-  @Override
-  public String toString() {
-    // TODO : change code
-    return null;
-  }
-
-
-  /**
-   * Returns the grades of the student.
-   *
-   * @return the grades of the student
-   */
-  public List<Grade> getGrades(){
-    // TODO : change code
-    return null;
-  }
-
-  /**
-   * Returns the average grade of the student.
-   *
-   * @return the average grade of the student
-   */
-  public Grade averageGrade() {
-    // TODO : change code
-    return null;
-  }
-
-  /**
-   * Print via the standard output the name of the student, all results associated to the students and
-   * the average grade of the student.
-   */
-  public void printResults(){
-    // TODO : add code
-  }
-
-
-  /**
-   * Determines whether or not two students are equal. Two instances of Student are equal if the values
-   * of their {@code firtName}  and {@code lastName} member fields are the same.
-   * @param o  an object to be compared with this Student
-   * @return {@code true} if the object to be compared is an instance of Student and has the same name; {@code false}
-   * otherwise.
-   */
-  @Override
-  public boolean equals(Object o) {
-    if (this == o) return true;
-    if (o == null || getClass() != o.getClass()) return false;
-
-    Student student = (Student) o;
-
-    if (!firstName.equals(student.firstName)) return false;
-    return lastName.equals(student.lastName);
-  }
-
-  /**
-   * Returns a hash code value for the object.
-   * @return a hash code value for this object.
-   */
-  @Override
-  public int hashCode() {
-    int result = firstName.hashCode();
-    result = 31 * result + lastName.hashCode();
-    return result;
-  }
-
-
-
-
-}

src/main/java/TeachingUnitResult.java

-/**
- * A result corresponding to a grade associated with a teaching unit.
- */
-
-public class TeachingUnitResult {
-  private final String teachingUnitName;
-  private final Grade grade;
-
-
-  /**
-   * Constructs an instance of TeachingUnitResult with a grade equals to the specified {@code grade}
-   * and a teaching unit name equals to the specified {@code teachingUnitName}.
-   *
-   * @param teachingUnitName the name of the teaching unit of the constructed TeachingUnitResult
-   * @param grade the grade of the constructed TeachingUnitResult
-   */
-
-  public TeachingUnitResult(String teachingUnitName, Grade grade) {
-    this.teachingUnitName = teachingUnitName;
-    this.grade = grade;
-  }
-
-  /**
-   * Returns the grade associated to the result.
-   *
-   * @return the grade associated to the result
-   */
-  public Grade getGrade() {
-    // TODO : change code
-    return null;
-  }
-
-  /**
-   * Returns a string representation of the result in the format Name of the teaching unit : X.X.
-   * @return a string representation of the result
-   */
-  @Override
-  public String toString() {
-    // TODO : change code
-    return null;
-  }
-
-
-  /**
-   * Determines whether or not two results are equal. Two instances of TeachingUnitResult are equal if the values
-   * of their {@code teachingUnitName} and {@code grade} member fields are the same.
-   * @param o  an object to be compared with this TeachingUnitResult
-   * @return {@code true} if the object to be compared is an instance of TeachingUnitResult and has the same grad and
-   * teaching unit name; {@code false} otherwise.
-   */
-  @Override
-  public boolean equals(Object o) {
-    if (this == o) return true;
-    if (o == null || getClass() != o.getClass()) return false;
-
-    TeachingUnitResult that = (TeachingUnitResult) o;
-
-    if (!teachingUnitName.equals(that.teachingUnitName)) return false;
-    return grade.equals(that.grade);
-  }
-
-  /**
-   * Returns a hash code value for the object.
-   * @return a hash code value for this object.
-   */
-  @Override
-  public int hashCode() {
-    int result = teachingUnitName.hashCode();
-    result = 31 * result + grade.hashCode();
-    return result;
-  }
-}

src/main/resources/fxml/Display.fxml

+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.layout.*?>
+
+
+<?import javafx.scene.canvas.Canvas?>
+<AnchorPane xmlns="http://javafx.com/javafx"
+            xmlns:fx="http://javafx.com/fxml"
+            fx:controller="Display">
+    <Canvas  fx:id="canvas"/>
+</AnchorPane>