diff --git a/.vscode/settings.json b/.vscode/settings.json
index c15385a..d24ff8e 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -85,5 +85,6 @@
   },
   "clang-tidy.buildPath": "builddir/",
   "clangd.onConfigChanged": "restart",
-  "C_Cpp.default.compileCommands": "./builddir/compile_commands.json"
+  "C_Cpp.default.compileCommands": "/home/moritz/Projekte/ptouch-prnt/builddir/compile_commands.json",
+  "gcovViewer.buildDirectories": ["/home/moritz/Projekte/ptouch-prnt/builddir"]
 }
diff --git a/generate_coverage.sh b/generate_coverage.sh
index 32b1ef4..0494499 100755
--- a/generate_coverage.sh
+++ b/generate_coverage.sh
@@ -2,6 +2,7 @@
 
 SCRIPT_PATH="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
 HTML_COV_PATH="coverageReport/html"
+XML_COV_PATH="coverageReport/xml"
 HTML_START_FILE="index.html"
 
 echo "Generating Coverage report for ptouch-prnt"
@@ -12,10 +13,15 @@ ninja -C builddir test
 mkdir -p ${HTML_COV_PATH}
 gcovr --html --html-details --html-syntax-highlighting --filter src --output ${HTML_COV_PATH}/${HTML_START_FILE}
 
+mkdir -p ${XML_COV_PATH}
+gcovr --xml-pretty --filter src --output ${XML_COV_PATH}/cov.xml
+
 if [ $? ] 
 then
   echo "Coverage report successful generated!"
   echo "Open: file://${SCRIPT_PATH}/${HTML_COV_PATH}/${HTML_START_FILE}"
 else
   echo "Error generating coverage report!"
-fi
\ No newline at end of file
+fi
+
+rm *.gcov
\ No newline at end of file
diff --git a/meson.build b/meson.build
index d523b8d..2ad425a 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('ptprnt', 'cpp',
     version: 'v0.1.0-'+run_command('git', 'rev-parse',  '--short', 'HEAD', check: true).stdout().strip(),
     license: 'GPLv3',
-    default_options : ['c_std=c11', 'cpp_std=c++17', 'b_sanitize=address,undefined', 'b_lto=true', 'b_lto_mode=thin', 'b_thinlto_cache=true']    
+    default_options : ['c_std=c11', 'cpp_std=c++17', 'b_sanitize=none', 'b_lto=true', 'b_lto_mode=thin', 'b_thinlto_cache=true']    
 )
 
 usb_dep = dependency('libusb-1.0')
diff --git a/src/P700Printer.cpp b/src/P700Printer.cpp
index 67ecdbd..6632294 100644
--- a/src/P700Printer.cpp
+++ b/src/P700Printer.cpp
@@ -122,21 +122,23 @@ bool P700Printer::detachUsbDevice() {
 }
 
 bool P700Printer::printBitmap(const graphics::Bitmap<graphics::ALPHA8>& bitmap) {
-    auto bm = graphics::Bitmap<graphics::ALPHA8>(512, 128);
-    {
-        auto img = graphics::Label();
-        bm.setPixels(std::vector<uint8_t>(img.getRaw(), img.getRaw() + 512 * 128));
+#ifdef DRYRUN
+    SPDLOG_DEBUG("DRYRUN enabled");
+    for (unsigned int lineNo = 0; lineNo < bitmap.getHeight(); lineNo++) {
+        auto line     = bitmap.getLine(lineNo);
+        auto monoLine = graphics::Monochrome(*line);
+        monoLine.visualize();
     }
+#endif
 
     send(commands["rasterstart"]);
-
     std::vector<uint8_t> rastercmd(4);
     rastercmd[0] = 0x47;
     rastercmd[1] = 0x00;  // size +1
     rastercmd[2] = 0x00;
     rastercmd[3] = 0x00;  // size -1
-    for (unsigned int i = 0; i < bm.getWidth(); i++) {
-        auto bmcol = bm.getCol(i);
+    for (unsigned int i = 0; i < bitmap.getWidth(); i++) {
+        auto bmcol = bitmap.getCol(i);
         if (!bmcol) {
             spdlog::error("Out of bounds bitmap access");
             break;
@@ -151,6 +153,7 @@ bool P700Printer::printBitmap(const graphics::Bitmap<graphics::ALPHA8>& bitmap)
         buf[1] = col.size() + 1;
         buf[3] = col.size() - 1;
         if (!send(buf)) {
+            spdlog::error("Error sending buffer to printer");
             break;
         };
     }
@@ -182,11 +185,11 @@ bool P700Printer::send(std::vector<uint8_t>& data) {
     }
 #else
     tx = data.size();
-    SPDLOG_DEBUG("USB raw data(len {}): {}", data.size(), spdlog::to_hex(data));
+    spdlog::info("USB raw data(len {}): {}", data.size(), spdlog::to_hex(data));
 #endif
 
     if (tx != static_cast<int>(data.size())) {
-        spdlog::error("Could not transfer all data via USB bulk transfer. Only send {} of {} bytes",
+        spdlog::error("Could not transfer all data via USB bulk transfer. Only sent {} of {} bytes",
                       tx, data.size());
         return false;
     }
diff --git a/src/P700Printer.hpp b/src/P700Printer.hpp
index a21fc55..0c26562 100644
--- a/src/P700Printer.hpp
+++ b/src/P700Printer.hpp
@@ -17,6 +17,7 @@
 
  */
 
+#include <spdlog/spdlog.h>
 #include <sys/types.h>
 
 #include <map>
@@ -67,7 +68,8 @@ class P700Printer : public ::ptprnt::IPrinterDriver {
                                        .name       = "Brother P-touch P700",
                                        .version    = "v1.0",
                                        .vid        = 0x04f9,
-                                       .pid        = 0x2061};
+                                       .pid        = 0x2061,
+                                       .pixelLines = 128};
     std::map<std::string, std::vector<uint8_t>> commands{
         {"rasterstart",
          {0x1b, 0x69, 0x61,
diff --git a/src/PtouchPrint.cpp b/src/PtouchPrint.cpp
index 42224d3..3f27ce6 100644
--- a/src/PtouchPrint.cpp
+++ b/src/PtouchPrint.cpp
@@ -16,12 +16,13 @@
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
  */
+#include <cstdint>
+
+#include "graphics/Monochrome.hpp"
 #define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
 #define SPDLOG_DEBUG_ON
 #define SPDLOG_TRACE_ON
 
-#include "PtouchPrint.hpp"
-
 #include <CLI/App.hpp>
 #include <fmt/core.h>
 #include <spdlog/common.h>
@@ -38,6 +39,7 @@
 
 #include "CLI/Option.hpp"
 #include "P700Printer.hpp"
+#include "PtouchPrint.hpp"
 #include "graphics/Bitmap.hpp"
 #include "graphics/Label.hpp"
 #include "libusbwrap/UsbDeviceFactory.hpp"
@@ -93,9 +95,6 @@ int PtouchPrint::run() {
     printer->attachUsbDevice(std::move(devices[0]));
     auto status = printer->getPrinterStatus();
     spdlog::info("Detected tape width is {}mm", status.tapeWidthMm);
-    auto bm = ptprnt::graphics::Bitmap<ptprnt::graphics::ALPHA8>(512, 128);
-    //printer->printBitmap(bm);
-    //printer->printText("wurst", 1);
 
     if (0 == mCommands.size()) {
         spdlog::warn("No command specified, nothing to do...");
@@ -106,7 +105,15 @@ int PtouchPrint::run() {
         SPDLOG_DEBUG("Command: {}", cmd.second);
         if (cmd.first == CliCmdType::Text) {
             auto label{graphics::Label()};
-            label.createLabel(cmd.second);
+            label.create(cmd.second, printer->getPrinterInfo().pixelLines);
+            auto bm = graphics::Bitmap<graphics::ALPHA8>(label.getLayoutWidth(),
+                                                         printer->getPrinterInfo().pixelLines);
+            if (!bm.setPixels(label.getRaw())) {
+                spdlog::error("Non-matching bitmap size");
+                return -1;
+            }
+            label.writeToPng("salat.png");
+            printer->printBitmap(bm);
         }
     }
 
diff --git a/src/graphics/Bitmap.cpp b/src/graphics/Bitmap.cpp
index bffb917..b31f045 100644
--- a/src/graphics/Bitmap.cpp
+++ b/src/graphics/Bitmap.cpp
@@ -22,6 +22,7 @@
 #include <algorithm>
 #include <spdlog/spdlog.h>
 
+#include <iostream>
 #include <iterator>
 #include <optional>
 #include <vector>
@@ -32,19 +33,20 @@ Bitmap<T>::Bitmap(uint16_t width, uint16_t height)
     : mWidth{width}, mHeight{height}, mPixels(width * height) {}
 
 template <class T>
-uint16_t Bitmap<T>::getWidth() {
+[[nodiscard]] uint16_t Bitmap<T>::getWidth() const {
     return mWidth;
 }
 
 template <class T>
-uint16_t Bitmap<T>::getHeight() {
+[[nodiscard]] uint16_t Bitmap<T>::getHeight() const {
     return mHeight;
 }
 
 template <class T>
 bool Bitmap<T>::setPixels(const std::vector<T>& pixels) {
     if (pixels.size() != mPixels.size()) {
-        spdlog::error("Invalid pixel buffer size.");
+        spdlog::error("Invalid pixel buffer size (got {} vs. {} bitmap size).", pixels.size(),
+                      mPixels.size());
         return false;
     }
 
@@ -53,12 +55,12 @@ bool Bitmap<T>::setPixels(const std::vector<T>& pixels) {
 }
 
 template <class T>
-std::vector<T> Bitmap<T>::getPixelsCpy() {
+[[nodiscard]] std::vector<T> Bitmap<T>::getPixelsCpy() const {
     return mPixels;
 }
 
 template <class T>
-std::optional<std::vector<T>> Bitmap<T>::getLine(uint16_t line) {
+[[nodiscard]] std::optional<std::vector<T>> Bitmap<T>::getLine(uint16_t line) const {
     if (line >= mHeight) {
         // out of bound
         return std::nullopt;
@@ -70,7 +72,7 @@ std::optional<std::vector<T>> Bitmap<T>::getLine(uint16_t line) {
 }
 
 template <class T>
-std::optional<std::vector<T>> Bitmap<T>::getCol(uint16_t col) {
+[[nodiscard]] std::optional<std::vector<T>> Bitmap<T>::getCol(uint16_t col) const {
     if (col >= mWidth) {
         // out of bound
         return std::nullopt;
diff --git a/src/graphics/Bitmap.hpp b/src/graphics/Bitmap.hpp
index 16325e8..1a2a84a 100644
--- a/src/graphics/Bitmap.hpp
+++ b/src/graphics/Bitmap.hpp
@@ -39,12 +39,18 @@ class Bitmap {
     Bitmap(uint16_t width, uint16_t height);
     ~Bitmap() = default;
 
-    uint16_t getWidth();
-    uint16_t getHeight();
+    Bitmap(const Bitmap&)            = default;
+    Bitmap& operator=(const Bitmap&) = default;
+    Bitmap(Bitmap&&)                 = default;
+    Bitmap& operator=(Bitmap&&)      = default;
+
+    [[nodiscard]] uint16_t getWidth() const;
+    [[nodiscard]] uint16_t getHeight() const;
     bool setPixels(const std::vector<T>& pixels);
-    std::vector<T> getPixelsCpy();
-    std::optional<std::vector<T>> getLine(uint16_t line);
-    std::optional<std::vector<T>> getCol(uint16_t col);
+    [[nodiscard]] std::vector<T> getPixelsCpy() const;
+    [[nodiscard]] std::optional<std::vector<T>> getLine(uint16_t line) const;
+    [[nodiscard]] std::optional<std::vector<T>> getCol(uint16_t col) const;
+    void visualize() const;
 
    private:
     uint16_t mWidth;
diff --git a/src/graphics/Label.cpp b/src/graphics/Label.cpp
index 8409755..1c5791e 100644
--- a/src/graphics/Label.cpp
+++ b/src/graphics/Label.cpp
@@ -22,9 +22,11 @@
 #include <algorithm>
 #include <spdlog/spdlog.h>
 
+#include <cassert>
 #include <cstddef>
 #include <iostream>  // remove me
 #include <string>
+#include <vector>
 
 #include "cairo.h"
 #include "pango/pango-context.h"
@@ -35,67 +37,69 @@
 #include "pango/pangocairo.h"
 
 namespace ptprnt::graphics {
-Label::Label() {
-    /*mSurface         = cairo_image_surface_create(CAIRO_FORMAT_A8, 512, 128);
-    cairo_t* cr      = cairo_create(mSurface);
-    mFontDescription = pango_font_description_new();
-    pango_font_description_set_family(mFontDescription, "sans");
-    pango_font_description_set_weight(mFontDescription, PANGO_WEIGHT_SEMIBOLD);
-    pango_font_description_set_size(mFontDescription, 60 * PANGO_SCALE);
+Label::Label()
+    : mPangoCtx(pango_font_map_create_context(pango_cairo_font_map_get_default())),
+      mPangoLyt(pango_layout_new(mPangoCtx)),
+      mPangoFontDesc(pango_font_description_from_string("Noto sans 32")) {}
 
-    std::string printThis("Mist 💩");
+std::vector<uint8_t> Label::getRaw() {
+    assert(mSurface != nullptr);
+    size_t len = mPrinterHeight * mLayoutWidth;
 
-    mLayout = pango_cairo_create_layout(cr);
-    pango_layout_set_font_description(mLayout, mFontDescription);
-    pango_layout_set_text(mLayout, printThis.c_str(), -1);
-
-    cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
-    cairo_move_to(cr, 0.0, 94.0);
-    pango_cairo_show_layout_line(cr, pango_layout_get_line(mLayout, 0));
-
-    cairo_surface_write_to_png(mSurface, "hello.png");*/
-}
-
-uint8_t* Label::getRaw() {
     cairo_surface_flush(mSurface);
-    return cairo_image_surface_get_data(mSurface);
+    auto data = cairo_image_surface_get_data(mSurface);
+    return {data, data + len};
 }
 
 uint8_t Label::getNumLines(std::string_view strv) {
     return std::count(strv.begin(), strv.end(), '\n');
 }
 
-void Label::createLabel(const std::string& str) {
+int Label::getLayoutHeight() {
+    return mLayoutHeight;
+}
 
-    // create Pango layout first, to get the render dimensions
-    auto pangoCtx{pango_font_map_create_context(pango_cairo_font_map_get_default())};
-    auto pangoLyt{pango_layout_new(pangoCtx)};
-    auto pangoFontDesc{pango_font_description_from_string("Noto sans 32")};
+int Label::getLayoutWidth() {
+    return mLayoutWidth;
+}
 
-    pango_layout_set_single_paragraph_mode(pangoLyt, true);
-    pango_layout_set_height(pangoLyt, getNumLines(str) * -1);
-    pango_layout_set_alignment(pangoLyt, PANGO_ALIGN_CENTER);
-    pango_layout_set_font_description(pangoLyt, pangoFontDesc);
-    pango_context_load_font(pangoCtx, pangoFontDesc);
-    pango_layout_set_text(pangoLyt, str.c_str(), static_cast<int>(str.length()));
+void Label::create(const std::string& labelText, const uint16_t heightPixel) {
+    mPrinterHeight = heightPixel;
+    pango_layout_set_single_paragraph_mode(mPangoLyt, true);
+    pango_layout_set_height(mPangoLyt, getNumLines(labelText) * -1);
+    pango_layout_set_alignment(mPangoLyt, PANGO_ALIGN_CENTER);
+    pango_layout_set_font_description(mPangoLyt, mPangoFontDesc);
+    pango_context_load_font(mPangoCtx, mPangoFontDesc);
+    pango_layout_set_text(mPangoLyt, labelText.c_str(), static_cast<int>(labelText.length()));
 
-    int width = 0, height = 0;
+    pango_layout_get_size(mPangoLyt, &mLayoutWidth, &mLayoutHeight);
 
-    pango_layout_get_size(pangoLyt, &width, &height);
+    mLayoutWidth /= PANGO_SCALE;
+    mLayoutHeight /= PANGO_SCALE;
 
-    SPDLOG_DEBUG("Layout width: {}, height: {}", width / PANGO_SCALE, height / PANGO_SCALE);
+    SPDLOG_DEBUG("Layout width: {}, height: {}", mLayoutWidth, mLayoutHeight);
 
-    auto surf   = cairo_image_surface_create(CAIRO_FORMAT_A8, width / PANGO_SCALE, 128);
-    cairo_t* cr = cairo_create(surf);
-    pango_cairo_show_layout(cr, pangoLyt);
+    mSurface    = cairo_image_surface_create(CAIRO_FORMAT_A8, mLayoutWidth, mPrinterHeight);
+    cairo_t* cr = cairo_create(mSurface);
+    pango_cairo_show_layout(cr, mPangoLyt);
 
     cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+    cairo_surface_flush(mSurface);
+    cairo_destroy(cr);
+}
 
-    // Debug only
-    cairo_surface_write_to_png(surf, "hellow.png");
+void Label::writeToPng(const std::string& file) {
+    if (mSurface) {
+        cairo_surface_flush(mSurface);
+        cairo_surface_write_to_png(mSurface, file.c_str());
+    }
 }
 
 Label::~Label() {
     SPDLOG_DEBUG("Image dtor...");
+    pango_font_description_free(mPangoFontDesc);
+    g_object_unref(mPangoCtx);
+    g_object_unref(mPangoLyt);
+    cairo_surface_destroy(mSurface);
 }
 }  // namespace ptprnt::graphics
\ No newline at end of file
diff --git a/src/graphics/Label.hpp b/src/graphics/Label.hpp
index db880de..ff6927a 100644
--- a/src/graphics/Label.hpp
+++ b/src/graphics/Label.hpp
@@ -23,6 +23,11 @@
 
 #include <cstdint>
 #include <string>
+#include <vector>
+
+#include "cairo.h"
+#include "pango/pango-font.h"
+#include "pango/pango-types.h"
 
 namespace ptprnt::graphics {
 
@@ -39,15 +44,21 @@ class Label {
     Label(Label&&)                 = delete;
     Label& operator=(Label&&)      = delete;
 
-    uint8_t* getRaw();
-    void createLabel(const std::string& labelText);
+    std::vector<uint8_t> getRaw();
+    void create(const std::string& labelText, const uint16_t heightPixel);
+    void writeToPng(const std::string& file);
+    int getLayoutWidth();
+    int getLayoutHeight();
 
    private:
     // methods
     uint8_t getNumLines(std::string_view str);
     // members
-    PangoLayout* mLayout;
-    PangoFontDescription* mFontDescription;
-    cairo_surface_t* mSurface;
+    PangoContext* mPangoCtx{nullptr};
+    PangoLayout* mPangoLyt{nullptr};
+    PangoFontDescription* mPangoFontDesc{nullptr};
+    cairo_surface_t* mSurface{nullptr};
+    int mLayoutWidth = 0, mLayoutHeight = 0;
+    int mPrinterHeight = 0;
 };
 }  // namespace ptprnt::graphics
\ No newline at end of file
diff --git a/src/graphics/Monochrome.cpp b/src/graphics/Monochrome.cpp
index b14b3fd..2c1a892 100644
--- a/src/graphics/Monochrome.cpp
+++ b/src/graphics/Monochrome.cpp
@@ -21,7 +21,8 @@
 
 #include <cmath>
 
-#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
 #include <iostream>
 #include <vector>
 
@@ -57,4 +58,20 @@ std::vector<uint8_t> Monochrome::get() {
     }
     return outPixels;
 }
+
+void Monochrome::visualize() {
+    auto mono = get();
+    for (unsigned char pix : mono) {
+        std::cout << ((pix & (1 << 7)) == 0 ? "." : "x");
+        std::cout << ((pix & (1 << 6)) == 0 ? "." : "x");
+        std::cout << ((pix & (1 << 5)) == 0 ? "." : "x");
+        std::cout << ((pix & (1 << 4)) == 0 ? "." : "x");
+        std::cout << ((pix & (1 << 3)) == 0 ? "." : "x");
+        std::cout << ((pix & (1 << 2)) == 0 ? "." : "x");
+        std::cout << ((pix & (1 << 1)) == 0 ? "." : "x");
+        std::cout << ((pix & (1 << 0)) == 0 ? "." : "x");
+    }
+    std::cout << std::endl;
+}
+
 }  // namespace ptprnt::graphics
\ No newline at end of file
diff --git a/src/graphics/Monochrome.hpp b/src/graphics/Monochrome.hpp
index b029de9..9b7db86 100644
--- a/src/graphics/Monochrome.hpp
+++ b/src/graphics/Monochrome.hpp
@@ -31,11 +31,12 @@ class Monochrome {
 
     void setThreshold(uint8_t);
     void invert(bool shouldInvert);
+    void visualize();
     std::vector<uint8_t> get();
 
    private:
     const std::vector<uint8_t>& mPixels;
-    uint8_t mThreshhold = 127;
+    uint8_t mThreshhold = UINT8_MAX / 2;
     bool mShouldInvert  = false;
 };
 }  // namespace ptprnt::graphics
\ No newline at end of file
diff --git a/src/interface/IPrinterTypes.hpp b/src/interface/IPrinterTypes.hpp
index 9e6e66d..dfcdfbc 100644
--- a/src/interface/IPrinterTypes.hpp
+++ b/src/interface/IPrinterTypes.hpp
@@ -30,6 +30,7 @@ struct PrinterInfo {
     std::string_view version    = "";
     uint16_t vid                = 0x00;
     uint16_t pid                = 0x00;
+    uint16_t pixelLines         = 0;
 };
 
 struct PrinterStatus {
diff --git a/src/libusbwrap/UsbDeviceFactory.cpp b/src/libusbwrap/UsbDeviceFactory.cpp
index f475fff..20991ba 100644
--- a/src/libusbwrap/UsbDeviceFactory.cpp
+++ b/src/libusbwrap/UsbDeviceFactory.cpp
@@ -32,7 +32,11 @@
 
 namespace libusbwrap {
 
-UsbDeviceFactory::~UsbDeviceFactory() = default;
+UsbDeviceFactory::~UsbDeviceFactory() {
+    if (mLibusbCtx) {
+        libusb_exit(mLibusbCtx);
+    }
+};
 
 std::vector<std::unique_ptr<IUsbDevice>> UsbDeviceFactory::findAllDevices() {
     refreshDeviceList();