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

meson.build

@@ -4,23 +4,59 @@ project('ptprnt', 'cpp',
     default_options : ['c_std=c11', 'cpp_std=c++17']
 )
 
-usbdep = dependency('libusb-1.0')
-logdep = dependency('spdlog')
+usb_dep = dependency('libusb-1.0')
+log_dep = dependency('spdlog')
+pangocairo_dep = dependency('pangocairo')
 
 incdir = include_directories('src')
 
-srcs = [
-    'src/main.cpp',
-    'src/PtouchPrint.cpp',
-    'src/P700Printer.cpp',
-    'src/libusbwrap/UsbDeviceFactory.cpp',
-    'src/libusbwrap/UsbDevice.cpp'
+ptprnt_hpps = [
+    'src/libusbwrap/interface/IUsbDeviceFactory.hpp',
+    'src/libusbwrap/interface/IUsbDevice.hpp',
+    'src/libusbwrap/UsbDeviceFactory.hpp',
+    'src/libusbwrap/LibUsbTypes.hpp',
+    'src/libusbwrap/UsbDevice.hpp',
+    'src/interface/IPrinterDriver.hpp',
+    'src/interface/IPrinterTypes.hpp',
+    'src/P700Printer.hpp',
+    'src/PtouchPrint.hpp',
+    'src/graphics/Bitmap.hpp',
+    'src/graphics/Image.hpp',
 ]
 
-executable(
+ptprnt_srcs = [
+    'src/PtouchPrint.cpp',
+    'src/P700Printer.cpp',
+    'src/graphics/Image.cpp',
+    'src/graphics/Bitmap.cpp',
+    'src/libusbwrap/UsbDeviceFactory.cpp',
+    'src/libusbwrap/UsbDevice.cpp',
+]
+
+ptprnt_lib = library('ptprnt', 
+                     include_directories: incdir,
+                     install: true,
+                     dependencies: [usb_dep, log_dep, pangocairo_dep],
+                     sources: [ptprnt_hpps, ptprnt_srcs])
+
+ptprnt_dep = declare_dependency(include_directories: incdir,
+                                link_with: ptprnt_lib)
+
+ptprnt_debug_exe = executable(
     'ptprnt', 
-    srcs,
-    include_directories : incdir,
-    dependencies : [usbdep, logdep],
+    'src/main.cpp',
+    install: true,
+    dependencies : [usb_dep, log_dep, ptprnt_dep],
     cpp_args : ['-DPROJ_VERSION="'+meson.project_version()+'"']
-)
+)
+
+
+
+#cmake = import('cmake')
+gtest_proj = subproject('gtest')
+gtest_dep = gtest_proj.get_variable('gtest_main_dep')
+if not gtest_dep.found()
+    error('MESON_SKIP_TEST: gtest not installed.')
+endif
+
+subdir('tests')