Support libzint >= 2.15 (#225,#222,#186))

- Update libzint support for 2.15 as new baseline version, removing support for earlier versions, avoiding '#ifdef'-hell
- Based on #186

---------

Co-authored-by: gitlost <burmartke@gmail.com>

backends/barcode/Zint.h

@@ -42,8 +42,11 @@ namespace glabels
 			{
 			protected:
 				int symbology;
-			
-			
+				int option_2;
+
+
+				Base();
+
 				bool validate( const std::string& rawData ) override;
 
 				void vectorize( const std::string& encodedData,
@@ -132,6 +135,19 @@ namespace glabels
 			};
 
 
+			/**
+			 * Channel Barcode
+			 */
+			class Channel : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Cbr Barcode
 			 */
@@ -145,6 +161,19 @@ namespace glabels
 			};
 
 
+			/**
+			 * Codeblock-F Barcode
+			 */
+			class Cblockf : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Code1 Barcode
 			 */
@@ -210,6 +239,19 @@ namespace glabels
 			};
 
 
+			/**
+			 * Code 2 of 5 Industrial Barcode
+			 */
+			class C25ind : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * C25dl Barcode
 			 */
@@ -366,6 +408,32 @@ namespace glabels
 			};
 
 
+			/**
+			 * DotCode Barcode
+			 */
+			class Dotcode : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
+			/**
+			 * DPD Code Barcode
+			 */
+			class Dpd : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Kix Barcode
 			 */
@@ -392,6 +460,58 @@ namespace glabels
 			};
 
 
+			/**
+			 * EAN-14 Barcode
+			 */
+			class Ean14 : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
+			/**
+			 * Facing Identification Mark Barcode
+			 */
+			class Fim : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
+			/**
+			 * Flattermarken Barcode
+			 */
+			class Flat : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
+			/**
+			 * Han Xin Barcode
+			 */
+			class Hanxin : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Hibc128 Barcode
 			 */
@@ -470,6 +590,19 @@ namespace glabels
 			};
 
 
+			/**
+			 * HIBC Codablock-F Barcode
+			 */
+			class Hibcblkf : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Hibcaz Barcode
 			 */
@@ -821,6 +954,32 @@ namespace glabels
 			};
 
 
+			/**
+			 * BC412 (SEMI T1-95) Barcode
+			 */
+			class Bc412 : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
+			/**
+			 * CEPNet Barcode
+			 */
+			class Cepnet : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Pdf Barcode
 			 */
@@ -860,6 +1019,19 @@ namespace glabels
 			};
 
 
+			/**
+			 * rMQR Barcode
+			 */
+			class Rmqr : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Rm4 Barcode
 			 */
@@ -873,6 +1045,32 @@ namespace glabels
 			};
 
 
+			/**
+			 * Royal Mail 4-State Mailmark Barcode
+			 */
+			class Rm4sm : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
+			/**
+			 * Royal Mail 2-D Mailmark Barcode
+			 */
+			class Rm2dm : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * UpcA Barcode
 			 */
@@ -899,6 +1097,19 @@ namespace glabels
 			};
 
 
+			/**
+			 * UPU S10 Barcode
+			 */
+			class UpuS10 : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 			/**
 			 * Usps Barcode
 			 */
@@ -925,6 +1136,19 @@ namespace glabels
 			};
 
 
+			/**
+			 * Vehicle Identification Number Barcode
+			 */
+			class Vin : public Base
+			{
+			public:
+				static Barcode* create();
+
+			protected:
+				std::string encode( const std::string& cookedData ) override;
+			};
+
+
 		}
 	}
 }