diff --git a/CMakeLists.txt b/CMakeLists.txt
index 808d4a5..4b7dad2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,7 @@ include_directories(lib/toml)
 set(LIB_PATH "${CMAKE_SOURCE_DIR}/../library")
 
 include_directories(${LIB_PATH}/include)
-add_executable(TextRenderer ${SOURCES} ${HEADERS} main/main.cpp)
+add_executable(TextRenderer ${SOURCES} ${HEADERS} main/main.cpp src/TextRenderer.cpp src/TextRenderer.h)
 
 target_link_libraries(TextRenderer ${LIB_PATH}/lib/liblibrary.a)
 
diff --git a/main/main.cpp b/main/main.cpp
index a9a229c..cd16cca 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1,8 +1,11 @@
 #include "Bitmap.h"
 #include "Font.h"
-
+#include "TextRenderer.h"
+#include "internal.hpp"
 #include <iostream>
 
+bool isQuit(std::string command);
+
 /**
  * @author: Julian Hinxlage
  * @since: v0.0.0
@@ -10,27 +13,102 @@
  * A string is converted and displayed in the console.
  * Currently only to test.
  */
+void outPutPixel(int windowHeight, int windowWidth, vkvm::Color fontColor);
+
 int main() {
-    Font font("../res/profont-IIx.bmp","../res/profont-IIx.toml");
-    //Font font("../res/font2.bmp","../res/font2.toml");
+    vkvm::initialize(0);
 
-    std::string str;
-    std::cout << "string to draw: ";
-    std::getline(std::cin, str);
+    std::string currentText;
 
-    for (int i = 0; i < font.height(); i++) {
-        for (char c : str) {
-            for (int j = 0; j < font.width(); j++) {
-                if (font.getPixel(c,j,i)) {
-                    std::cout << "█";
-                } else {
-                    std::cout << " ";
-                }
-            }
-            std::cout << " ";
+
+    /*************************set back to shared memory(only for test)********************************************/
+    int windowWidth = vkvm::getWidth();
+    int windowHeight = vkvm::getHeight();
+    vkvm::setWidth(windowWidth);
+    vkvm::setHeight(windowHeight);
+
+    vkvm::Color fontColor1(0, 0, 0);
+    vkvm::Color backgroudColor1(255, 255, 255);
+    Font font1("../res/font3.bmp", "../res/font3.toml");
+    vkvm::setFont(vkvm::FontType(3, "font", font1.height(), font1.width()));
+    vkvm::setForegroundColor(fontColor1);
+    vkvm::setBackgroundColor(backgroudColor1);
+    /**************************get text and font from shared memory*******************************************/
+    std::string fontResourcePath = "../res/font" + std::to_string(vkvm::getFont().getId())  + ".bmp";
+    std::string fontConfigureFilePath = "../res/font" + std::to_string(vkvm::getFont().getId())  + ".toml";
+    Font font = Font(fontResourcePath, fontConfigureFilePath);
+    vkvm::Color fontColor = vkvm::getForegroundColor();
+    vkvm::Color backgroundColor = vkvm::getBackgroundColor();
+    TextRenderer textRenderer(windowWidth, windowHeight, backgroundColor, fontColor, font);
+    textRenderer.setLeftMargin(1);
+    textRenderer.setBottomMargin(1);
+    /*************************get Text and update back to shared meomory********************************************/
+
+    vkvm::registerEvent(vkvm::EventType::RenderText, [&textRenderer](){
+        std::string currentText = vkvm::getText();
+        textRenderer.update(currentText);
+        vkvm::callEvent(vkvm::EventType::Redraw);
+    });
+
+
+
+    std::string command;
+    std::cout << "TextRender: ";
+    std::getline(std::cin, command);
+    while(!isQuit(command)) {
+        if(command.compare("clear")) {
+            vkvm::setText(command);
+            currentText = vkvm::getText();
+            textRenderer.update(currentText);
+            outPutPixel(windowHeight, windowWidth, fontColor);
+            std::cout << "TextRender: ";
+            std::getline(std::cin, command);
+        } else {
+            textRenderer.clear();
         }
-        std::cout << std::endl;
     }
 
+
+    std::cout << "TextRender finished." << std::endl;
+
     return 0;
 }
+
+/***************************read pixel in shared memory and test output in console******************************************/
+void outPutPixel(int windowHeight, int windowWidth, vkvm::Color fontColor) {
+    for(int y = 0; y < windowHeight; y++) {
+        for(int x = 0; x < windowWidth; x++) {
+            if(vkvm::getPixel(x, y).getRed() == fontColor.getRed()) {
+                std::cout << "*";
+            } else {
+                std::cout << " ";
+            }
+        }
+        std::cout << "\n";
+    }
+}
+
+
+//    std::string str;
+//    std::cout << "string to draw: ";
+//    std::getline(std::cin, str);
+//
+//    for (int i = 0; i < font.height(); i++) {
+//        for (char c : str) {
+//            for (int j = 0; j < font.width(); j++) {
+//                if (font.getPixel(c,j,i)) {
+//                    std::cout << "█";
+//                } else {
+//                    std::cout << " ";
+//                }
+//            }
+//            std::cout << " ";
+//        }
+//        std::cout << std::endl;
+//    }
+//
+//    return 0;
+
+bool isQuit(std::string command) {
+    return command.compare("quit") == 0;
+}
diff --git a/res/profont-IIx.bmp b/res/font3.bmp
similarity index 100%
rename from res/profont-IIx.bmp
rename to res/font3.bmp
diff --git a/res/profont-IIx.toml b/res/font3.toml
similarity index 88%
rename from res/profont-IIx.toml
rename to res/font3.toml
index 5bed19f..102a09f 100644
--- a/res/profont-IIx.toml
+++ b/res/font3.toml
@@ -9,4 +9,4 @@ yStart = 9
 fillValue = 4294967295
 firstChar = 25
 pixelSize = 1
-invertedColors = 1
\ No newline at end of file
+invertedColors = 1
diff --git a/src/Bitmap.h b/src/Bitmap.h
index 7c82032..fd73947 100644
--- a/src/Bitmap.h
+++ b/src/Bitmap.h
@@ -19,7 +19,7 @@ public:
      * @since: v0.0.0
      * @brief: Used to load a Bitmap from a file.
      */
-     void load(const std::string &file);
+    void load(const std::string &file);
 
     /**
      * @author: Julian Hinxlage
diff --git a/src/TextRenderer.cpp b/src/TextRenderer.cpp
new file mode 100644
index 0000000..c827131
--- /dev/null
+++ b/src/TextRenderer.cpp
@@ -0,0 +1,128 @@
+//
+// Created by my on 2019/11/16.
+//
+#include "TextRenderer.h"
+
+TextRenderer::TextRenderer(int windowWidth, int windowHeight, vkvm::Color backgroundColor, vkvm::Color fontColor, Font font)
+                            : backgroundColor(backgroundColor), fontColor(fontColor), font(font) {
+    this-> windowWidth = windowWidth;
+    this-> windowHeight = windowHeight;
+    fontWidth = font.width();
+    fontHeight = font.height();
+}
+
+void TextRenderer::update(std::string newText) {
+    int startX = 0;
+    int startY = 0;
+    int i;
+    int fontNumbersInOneLine = windowWidth / (fontWidth + left_margin);
+    std::vector<std::vector<bool>> characterBitmap;
+
+    for(i = 0; i < newText.size(); i++) {
+        if(i > oldText.size() || oldText[i] != newText[i]) {
+            startX = (i % fontNumbersInOneLine) * (fontWidth + left_margin);
+            startY = (i / fontNumbersInOneLine) * (fontHeight + bottom_margin);
+            characterBitmap = getCharacter(newText[i], font);
+//            fontProcessing(characterBitmap);
+            translateToSharedMemory(characterBitmap, startX, startY);
+        }
+    }
+
+    setOldText(newText);
+}
+
+void TextRenderer::clear() {
+    int x, y;
+    for(y = 0; y < windowHeight; y++) {
+        for(x = 0; x < windowWidth; x++) {
+            vkvm::setPixel(x, y, backgroundColor);
+        }
+    }
+}
+
+void TextRenderer::setOldText(std::string text) {
+    oldText = text;
+}
+
+std::vector<std::vector<bool>> TextRenderer::getCharacter(unsigned char character, Font font) {
+    int fontHeight = font.height();
+    int fontWidth = font.width();
+    std::vector<std::vector<bool>> bitmap_character;
+
+//    bitmap_character = (bool**)malloc(fontHeight * sizeof(bool*));
+    bitmap_character.resize(fontHeight);
+    for (int i = 0; i < fontHeight; i++) {
+//        bitmap_character[i] = (bool*)malloc(fontWidth * sizeof(bool));
+        bitmap_character[i].resize(fontWidth);
+        for (int j = 0; j < fontWidth; j++) {
+            bitmap_character[i][j] = font.getPixel(character, j, i);
+        }
+    }
+
+    return bitmap_character;
+}
+
+void TextRenderer::fontProcessing(std::vector<std::vector<bool>> characterBitmap) {
+//    if(isBold()) {
+        for (int i = fontHeight - 1; i >= 0; i--) {
+            for (int j = fontWidth - 1; j >= 0; j--) {
+                if (i != fontHeight - 1 && j != fontWidth - 1 && characterBitmap[i][j]) {
+                    characterBitmap[i + 1][j] = true;
+                    characterBitmap[i][j + 1] = true;
+                }
+            }
+        }
+//    }
+//    if(isUnderline()) {
+//        for (int j = 0; j < fontWidth; j++)
+//            characterBitmap[fontHeight - 1][j] = true;
+//    }
+}
+
+bool TextRenderer::isBold() {
+    return type & BOLD != 0;
+}
+
+bool TextRenderer::isUnderline() {
+    return type & UNDERLINE != 0;
+}
+
+void TextRenderer::translateToSharedMemory(std::vector<std::vector<bool>> characterBitmap, int startX, int startY) {
+    int x, y;
+    int currentX = startX;
+    int currentY = startY;
+
+    for(y = 0; y < fontHeight; y++) {
+        for(x = 0; x < fontWidth; x++) {
+            if(characterBitmap[y][x]) {
+                vkvm::setPixel(currentX, currentY, fontColor);
+            }
+            else {
+                vkvm::setPixel(currentX, currentY, backgroundColor);
+            }
+            currentX++;
+        }
+        currentX = startX;
+        currentY++;
+    }
+
+    for(x = 0; x < left_margin; x++) {
+        for(y = 0; y < fontHeight; y++) {
+            vkvm::setPixel(startX + fontWidth + x, startY + y, backgroundColor);
+        }
+    }
+
+    for(y = 0; y < bottom_margin; y++) {
+        for(x = 0; x < fontWidth + left_margin; x++) {
+            vkvm::setPixel(startX + x, startY + fontHeight + y, backgroundColor);
+        }
+    }
+}
+
+void TextRenderer::setLeftMargin(int margin) {
+    left_margin = margin;
+}
+
+void TextRenderer::setBottomMargin(int margin) {
+    bottom_margin = margin;
+}
diff --git a/src/TextRenderer.h b/src/TextRenderer.h
new file mode 100644
index 0000000..1195563
--- /dev/null
+++ b/src/TextRenderer.h
@@ -0,0 +1,54 @@
+//
+// Created by my on 2019/11/16.
+//
+
+#ifndef TEXTRENDERER_TEXTRENDERER_H
+#define TEXTRENDERER_TEXTRENDERER_H
+
+#define BOLD 0b001
+#define ITALICS 0b010
+#define UNDERLINE 0b100
+
+#include <string>
+#include <Color.hpp>
+#include <vkvm.hpp>
+#include <iostream>
+#include "Font.h"
+
+/**
+ * @author: Yajie Qi, Shaohua Tong
+ * @since: v0.0.0
+ * @brief:  gets a string from the Shared Memory and converts the text into a bitmap-array.
+ */
+class TextRenderer {
+public:
+    TextRenderer(int windowWidth, int windowHeight, vkvm::Color defaultBackgroundColor, vkvm::Color fontColor, Font font);
+
+    void update(std::string text);
+    void setOldText(std::string text);
+    std::vector<std::vector<bool>> getCharacter(unsigned char character, Font font);
+    void setLeftMargin(int margin);
+    void setBottomMargin(int margin);
+    void clear();
+
+private:
+    std::string oldText;
+    vkvm::Color backgroundColor;
+    vkvm::Color fontColor;
+    Font font;
+    int left_margin = 1;
+    int bottom_margin = 1;
+    int type;
+    int windowWidth;
+    int windowHeight;
+    int fontWidth;
+    int fontHeight;
+    bool isBold();
+    bool isItalics();
+    bool isUnderline();
+    void fontProcessing(std::vector<std::vector<bool>> characterBitmap);
+    void translateToSharedMemory(std::vector<std::vector<bool>> characterBitmap, int startX, int startY);
+};
+
+
+#endif //TEXTRENDERER_TEXTRENDERER_H