Moved graphics classes into own namespace, added unit testing with gtest

src/graphics/Image.cpp

@@ -0,0 +1,33 @@
+#include "Image.hpp"
+
+#include "pango/pango-font.h"
+
+namespace ptprnt::graphics {
+Image::Image() {
+    mSurface         = cairo_image_surface_create(CAIRO_FORMAT_A1, 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);
+
+    mLayout = pango_cairo_create_layout(cr);
+    pango_layout_set_font_description(mLayout, mFontDescription);
+    pango_layout_set_text(mLayout, "Hello, world", -1);
+
+    cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+    cairo_move_to(cr, 10.0, 94.0);
+    pango_cairo_show_layout_line(cr, pango_layout_get_line(mLayout, 0));
+
+    cairo_surface_write_to_png(mSurface, "hello.png");
+}
+
+uint8_t* Image::getRaw() {
+    return cairo_image_surface_get_data(mSurface);
+}
+
+Image::~Image() {
+    g_object_unref(mLayout);
+    pango_font_description_free(mFontDescription);
+}
+}  // namespace ptprnt::graphics