From d84e36d50b68272e0e2b45bde041fc3bb8582119 Mon Sep 17 00:00:00 2001
From: Julian Hinxlage <hinxlage.julian@web.de>
Date: Tue, 15 Oct 2019 16:12:56 +0200
Subject: [PATCH] +Bitmap class +Bitmap file loading +string output using font

---
 CMakeLists.txt |  2 +-
 src/Bitmap.cpp | 54 +++++++++++++++++++++++++++++++++++++++
 src/Bitmap.h   | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/main.cpp   | 52 ++++++++++++++++++++++++++++++++++++--
 4 files changed, 173 insertions(+), 3 deletions(-)
 create mode 100644 src/Bitmap.cpp
 create mode 100644 src/Bitmap.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bfe6883..7a5296a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,7 +9,7 @@ include_directories(src)
 set(LIB_PATH "${CMAKE_SOURCE_DIR}/../library/build")
 
 include_directories(${LIB_PATH}/include)
-add_executable(TextRenderer ${SOURCES} ${HEADERS})
+add_executable(TextRenderer ${SOURCES} ${HEADERS} src/Bitmap.cpp src/Bitmap.h)
 
 target_link_libraries(TextRenderer ${LIB_PATH}/lib/liblibrary.a)
 
diff --git a/src/Bitmap.cpp b/src/Bitmap.cpp
new file mode 100644
index 0000000..9972e23
--- /dev/null
+++ b/src/Bitmap.cpp
@@ -0,0 +1,54 @@
+#include "Bitmap.h"
+#include <fstream>
+#include <iostream>
+
+Bitmap::Bitmap() {
+    offset = 0;
+    width = 0;
+    height = 0;
+    bpp = 0;
+    data = nullptr;
+}
+
+Bitmap::~Bitmap() {
+    if(data){
+        delete data;
+        data = nullptr;
+    }
+}
+
+void Bitmap::load(const std::string &file) {
+    std::ifstream stream(file);
+    if(stream.is_open()){
+        std::string str((std::istreambuf_iterator<char>(stream)),std::istreambuf_iterator<char>());
+        data = new char[str.size()];
+        for(int i = 0; i < str.size();i++){
+            data[i] = str[i];
+        }
+
+        offset = *(unsigned int*)(data + 10);
+        width = *(unsigned int*)(data + 18);
+        height = *(unsigned int*)(data + 22);
+        bpp = *(unsigned short*)(data + 28);
+    }
+}
+
+int Bitmap::getWidth() {
+    return width;
+}
+
+int Bitmap::getHeight() {
+    return height;
+}
+
+char *Bitmap::getData() {
+    return data + offset;
+}
+
+int Bitmap::getBitsPerPixel() {
+    return bpp;
+}
+
+char *Bitmap::getPixel(int x, int y) {
+    return getData() + ((getHeight() - y) * getWidth() + x) * getBitsPerPixel() / 8;
+}
diff --git a/src/Bitmap.h b/src/Bitmap.h
new file mode 100644
index 0000000..48cc47c
--- /dev/null
+++ b/src/Bitmap.h
@@ -0,0 +1,68 @@
+#ifndef TEXTRENDERER_BITMAP_H
+#define TEXTRENDERER_BITMAP_H
+
+#include <string>
+
+/*
+ * @author: Julian Hinxlage
+ * @since: v0.0.0
+ * @brief: Used to load a Bitmap from a file.
+ */
+class Bitmap {
+public:
+    Bitmap();
+
+    ~Bitmap();
+
+    /*
+     * @author: Julian Hinxlage
+     * @since: v0.0.0
+     * @brief: Used to load a Bitmap from a file.
+     */
+     void load(const std::string &file);
+
+    /*
+     * @author: Julian Hinxlage
+     * @since: v0.0.0
+     * @return: the width of the image.
+     */
+    int getWidth();
+
+    /*
+     * @author: Julian Hinxlage
+     * @since: v0.0.0
+     * @return: the height of the image
+     */
+    int getHeight();
+
+    /*
+     * @author: Julian Hinxlage
+     * @since: v0.0.0
+     * @return: the pixel data as an byte array
+     */
+    char *getData();
+
+    /*
+     * @author: Julian Hinxlage
+     * @since: v0.0.0
+     * @return: the number of bits uses per pixel
+     */
+    int getBitsPerPixel();
+
+    /*
+     * @author: Julian Hinxlage
+     * @since: v0.0.0
+     * @return: the pixel value by coordinates, (0,0) is on the top left
+     */
+    char *getPixel(int x, int y);
+
+private:
+    int width;
+    int height;
+    int offset;
+    int bpp;
+    char *data;
+};
+
+
+#endif //TEXTRENDERER_BITMAP_H
diff --git a/src/main.cpp b/src/main.cpp
index 227cd45..a498b2c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,9 +1,57 @@
 #include <iostream>
 
 #include "add.h"
+#include "Bitmap.h"
 
+/*
+ * @author: Julian Hinxlage
+ * @since: v0.0.0
+ * @brief: An image is loaded and used as a font.
+ * A string is converted and displayed in the console.
+ * Currently only to test.
+ */
 int main() {
-    std::cout << "Hello, World!" << std::endl;
-    std::cout << add(6,7) << std::endl;
+    Bitmap bitmap;
+    bitmap.load("../res/font.bmp");
+
+    std::string str = "Hello, World!";
+
+    //values used to calculate the coordinates of the characters
+    int xOffset = 1;
+    int yOffset = 2;
+    int xSize = 6;
+    int ySize = 7;
+    int xCount = 18;
+    int xStart = 0;
+    int yStart = 2;
+
+    //print vertical
+    //i is the current row
+    for (int i = 0; i < ySize; i++) {
+        //loop through the characters in the string
+        for (char c : str) {
+            //index of character(x and y)
+            int index = (c - ' ');
+            int xIndex = index % xCount;
+            int yIndex = index / xCount;
+
+            //character index to pixel index conversion
+            int x = xIndex * (xSize + xOffset) + xStart;
+            int y = yIndex * (ySize + yOffset) + yStart;
+
+            //print current row of the current character
+            for (int j = x; j < x + xSize; j++) {
+                auto *pixel = (unsigned int *) bitmap.getPixel(j, i + y);
+                if (*pixel == 0) {
+                    std::cout << " ";
+                } else {
+                    std::cout << "1";
+                }
+            }
+            std::cout << " ";
+        }
+        std::cout << std::endl;
+    }
+
     return 0;
 }
\ No newline at end of file