diff --git a/Libraries/formatlib/Sources/arm/format/JpgWriter.hx b/Libraries/formatlib/Sources/arm/format/JpgWriter.hx
index 87597d19..9d066ace 100644
--- a/Libraries/formatlib/Sources/arm/format/JpgWriter.hx
+++ b/Libraries/formatlib/Sources/arm/format/JpgWriter.hx
@@ -531,7 +531,7 @@ class JpgWriter {
 	var UDU: Array<Float>;
 	var VDU: Array<Float>;
 
-	function RGB2YUV(img: haxe.io.Bytes, width : Int, xpos: Int, ypos: Int) {
+	function ARGB2YUV(img: haxe.io.Bytes, width : Int, xpos: Int, ypos: Int) {
 		var pos = 0;
 		for( y in 0...8 ) {
 			var offset = ((y + ypos) * width + xpos) << 2;
@@ -587,7 +587,7 @@ class JpgWriter {
 		initCategoryNumber();
 	}
 
-	public function write( image : JpgData, type = 0, off = 0 ) {
+	public function write( image : JpgData, type = 0, off = 0, swapRG = false ) {
 		// init quality table
 		var quality = image.quality;
 		if( quality <= 0 ) quality = 1;
@@ -622,7 +622,7 @@ class JpgWriter {
 			while( ypos < height ) {
 				var xpos = 0;
 				while( xpos < width ) {
-					RGB2YUV(image.pixels, width, xpos, ypos);
+					ARGB2YUV(image.pixels, width, xpos, ypos);
 					DCY = processDU(YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT);
 					DCU = processDU(UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
 					DCV = processDU(VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
@@ -631,7 +631,20 @@ class JpgWriter {
 				ypos += 8;
 			}
 		}
-		else if (type == 1) {
+		else if (type == 1 && !swapRG) {
+			while( ypos < height ) {
+				var xpos = 0;
+				while( xpos < width ) {
+					RGBA2YUV(image.pixels, width, xpos, ypos);
+					DCY = processDU(YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT);
+					DCU = processDU(UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
+					DCV = processDU(VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
+					xpos += 8;
+				}
+				ypos += 8;
+			}
+		}
+		else if (type == 1 && swapRG) {
 			while( ypos < height ) {
 				var xpos = 0;
 				while( xpos < width ) {
@@ -648,7 +661,7 @@ class JpgWriter {
 			while( ypos < height ) {
 				var xpos = 0;
 				while( xpos < width ) {
-					BGRA2YUV_(image.pixels, width, xpos, ypos, off);
+					RRR2YUV(image.pixels, width, xpos, ypos, off);
 					DCY = processDU(YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT);
 					DCU = processDU(UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
 					DCV = processDU(VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
@@ -668,7 +681,7 @@ class JpgWriter {
 	}
 
 	// armory
-	function BGRA2YUV(img: haxe.io.Bytes, width : Int, xpos: Int, ypos: Int) {
+	function RGBA2YUV(img: haxe.io.Bytes, width : Int, xpos: Int, ypos: Int) {
 		var pos = 0;
 		for( y in 0...8 ) {
 			var offset = ((y + ypos) * width + xpos) << 2;
@@ -684,7 +697,23 @@ class JpgWriter {
 			}
 		}
 	}
-	function BGRA2YUV_(img: haxe.io.Bytes, width : Int, xpos: Int, ypos: Int, off: Int) {
+	function BGRA2YUV(img: haxe.io.Bytes, width : Int, xpos: Int, ypos: Int) {
+		var pos = 0;
+		for( y in 0...8 ) {
+			var offset = ((y + ypos) * width + xpos) << 2;
+			for( x in 0...8 ) {
+				var B = img.get(offset++);
+				var G = img.get(offset++);
+				var R = img.get(offset++);
+				offset++; // skip alpha
+				YDU[pos] = ((( 0.29900) * R + ( 0.58700) * G + ( 0.11400) * B)) -128;
+				UDU[pos] = (((-0.16874) * R + (-0.33126) * G + ( 0.50000) * B));
+				VDU[pos] = ((( 0.50000) * R + (-0.41869) * G + (-0.08131) * B));
+				pos++;
+			}
+		}
+	}
+	function RRR2YUV(img: haxe.io.Bytes, width : Int, xpos: Int, ypos: Int, off: Int) {
 		var pos = 0;
 		for( y in 0...8 ) {
 			var offset = ((y + ypos) * width + xpos) << 2;
diff --git a/Libraries/formatlib/Sources/arm/format/PngTools.hx b/Libraries/formatlib/Sources/arm/format/PngTools.hx
index b47f59dd..660d3f77 100644
--- a/Libraries/formatlib/Sources/arm/format/PngTools.hx
+++ b/Libraries/formatlib/Sources/arm/format/PngTools.hx
@@ -140,6 +140,26 @@ class PngTools {
 	}
 
 	// armory
+	public static function build32BGR1( width : Int, height : Int, data : haxe.io.Bytes, ?level = 9 ) : PngData {
+		var rgba = haxe.io.Bytes.alloc(width * height * 4 + height);
+		var w = 0, r = 0;
+		for( y in 0...height ) {
+			rgba.set(w++,0); // no filter for this scanline
+			for( x in 0...width ) {
+				rgba.set(w++,data.get(r+2)); // r
+				rgba.set(w++,data.get(r+1)); // g
+				rgba.set(w++,data.get(r)); // b
+				rgba.set(w++,255); // 1
+				r += 4;
+			}
+		}
+		var l = new List();
+		l.add(CHeader({ width : width, height : height, colbits : 8, color : ColTrue(true), interlaced : false }));
+		l.add(CData(deflate(rgba,level)));
+		l.add(CEnd);
+		return l;
+	}
+
 	public static function build32RGB1( width : Int, height : Int, data : haxe.io.Bytes, ?level = 9 ) : PngData {
 		var rgba = haxe.io.Bytes.alloc(width * height * 4 + height);
 		var w = 0, r = 0;
diff --git a/Sources/arm/io/ExportTexture.hx b/Sources/arm/io/ExportTexture.hx
index 94bed44e..186c396e 100644
--- a/Sources/arm/io/ExportTexture.hx
+++ b/Sources/arm/io/ExportTexture.hx
@@ -271,20 +271,41 @@ class ExportTexture {
 			var writer = new PngWriter(out);
 			var data =
 				type == 1 ?
+					#if kha_metal
+					PngTools.build32BGR1(res, res, pixels) :
+					#else
 					PngTools.build32RGB1(res, res, pixels) :
+					#end
 				type == 2 ?
+					#if kha_metal
+					PngTools.build32RRR1(res, res, pixels, 2 - off) :
+					#else
 					PngTools.build32RRR1(res, res, pixels, off) :
+					#end
+
+					#if kha_metal
+					PngTools.build32BGRA(res, res, pixels);
+					#else
 					PngTools.build32RGBA(res, res, pixels);
+					#end
 			writer.write(data);
 		}
 		else {
 			var writer = new JpgWriter(out);
-			writer.write({
-				width: res,
-				height: res,
-				quality: Context.formatQuality,
-				pixels: pixels
-			}, type, off);
+			writer.write(
+				{
+					width: res,
+					height: res,
+					quality: Context.formatQuality,
+					pixels: pixels
+				},
+				type,
+				#if kha_metal
+				2 - off, true
+				#else
+				off, false
+				#end
+			);
 		}
 		Krom.fileSaveBytes(file, out.getBytes().getData());
 	}