Generate labels with pangocairo (#8)

Goal of this PR is to have some basic labels generated with pangocairo
- size of the canvas should be matching the input text and grow/shrink accordingly
- basic formatting options like fontsize and align should be working

Reviewed-on: moritz/ptouch-prnt#8

meson.build

@@ -1,7 +1,22 @@
-project('ptprnt', 'cpp',
-    version: 'v0.1.0-'+run_command('git', 'rev-parse',  '--short', 'HEAD', check: true).stdout().strip(),
+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']    
+    default_options: [
+        'c_std=c11',
+        'cpp_std=c++20',
+        'b_sanitize=none',
+        'b_lto=true',
+        'b_lto_mode=thin',
+        'b_thinlto_cache=true',
+    ],
 )
 
 usb_dep = dependency('libusb-1.0')
@@ -20,14 +35,23 @@ incdir = include_directories('src')
 
 subdir('src')
 
+# Build arguments
+cpp_args = ['-DPROJ_VERSION="' + meson.project_version() + '"']
+
+# USB trace mode option (for debugging without sending to hardware)
+if get_option('usb_trace_only')
+    cpp_args += ['-DUSB_TRACE_ONLY']
+    message('USB_TRACE_ONLY enabled: USB data will be logged but not sent to device')
+endif
+
 ptprnt_exe = executable(
-    'ptprnt', 
+    'ptprnt',
     'src/main.cpp',
     install: true,
-    dependencies : [usb_dep, log_dep, fmt_dep, pangocairo_dep, cli11_dep],
+    dependencies: [usb_dep, log_dep, fmt_dep, pangocairo_dep, cli11_dep],
     include_directories: incdir,
     sources: [ptprnt_srcs],
-    cpp_args : ['-DPROJ_VERSION="'+meson.project_version()+'"'],
+    cpp_args: cpp_args,
 )
 
 
@@ -40,4 +64,4 @@ if not gtest_dep.found()
     error('MESON_SKIP_TEST: gtest not installed.')
 endif
 
-subdir('tests')
+subdir('tests')