Sprite order for tileset plugin

src/main.rs

@@ -27,6 +27,14 @@ fn main() {
                         .default_value( "bin" )
                         .takes_value( true )
                 )
+                .arg(
+                    Arg::with_name( "TILEORDER" )
+                        .short( "to" )
+                        .long( "tile-order" )
+                        .help( "Specify tile order for tileset (valid TILEORDER options: tile, sprite" )
+                        .default_value( "tile" )
+                        .takes_value( true )
+                )
         )
         .get_matches();
 
@@ -35,7 +43,12 @@ fn main() {
         // Get input and output filenames
         if let Some( input_filename ) = matches.value_of( "input" ) {
             if let Some( output_filename ) = matches.value_of( "output" ) {
-                return tileset::generate( input_filename, output_filename, matches.value_of( "FORMAT" ).unwrap() );
+                return tileset::generate(
+                    input_filename,
+                    output_filename,
+                    matches.value_of( "FORMAT" ).unwrap(),
+                    matches.value_of( "TILEORDER" ).unwrap()
+                );
             } else {
                 utility::print_error( "expected: output_filename (-o,--output)" );
             }

src/reskit/tileset.rs

@@ -114,7 +114,7 @@ fn output_inc( image_filename: &str, output_filename: &str, palette: [u16; 16],
 	utility::print_good( format!( "converted file {}", image_filename ).as_str() );
 }
 
-pub fn generate( image_filename: &str, output_filename: &str, output_mode: &str ) {
+pub fn generate( image_filename: &str, output_filename: &str, output_mode: &str, tile_order: &str ) {
 	let img = image::open( image_filename );
 	if let Ok( img ) = img {
 		let ( mut max_x, mut max_y ) = img.dimensions();
@@ -124,6 +124,35 @@ pub fn generate( image_filename: &str, output_filename: &str, output_mode: &str
 		let mut palette: [u16; 16] = [ 0; 16 ];
 		let mut body: Vec< u8 > = Vec::new();
 
+		if tile_order == "sprite" {
+			/*
+			 * Tile order:
+			 * 1 3
+			 * 2 4
+			 */
+			 for x in ( 0..max_x ).step_by( 8 ) {
+				for y in ( 0..max_y ).step_by( 8 ) {
+					for cell_y in 0..8 {
+						let mut series: u32 = 0;
+
+						for cell_x in 0..8 {
+							let nibble: u32 = get_pixel( &img, &mut palette, cell_x + x, cell_y + y ) << ( ( 7 - cell_x ) * 4 );
+							series = series | nibble;
+						}
+
+						let bytes = series.to_be_bytes();
+						for i in 0..4 {
+							body.push( bytes[ i ] );
+						}
+					}
+				}
+			}
+		} else {
+			/*
+			 * Tile order:
+			 * 1 2
+			 * 3 4
+			 */
 			for y in ( 0..max_y ).step_by( 8 ) {
 				for x in ( 0..max_x ).step_by( 8 ) {
 					for cell_y in 0..8 {
@@ -141,6 +170,7 @@ pub fn generate( image_filename: &str, output_filename: &str, output_mode: &str
 					}
 				}
 			}
+		}
 
 		if output_mode == "bin" {
 			output_bin( image_filename, output_filename, palette, body );