Apply mask fixes

Shaders/painter/glsl/layer_copy.frag.glsl

@@ -1,23 +1,8 @@
 #version 330
 uniform sampler2D tex;
-uniform int channel;
 in vec2 texCoord;
 in vec4 color;
 out vec4 FragColor;
 void main() {
-	if (channel == 1) {
+	FragColor = textureLod(tex, texCoord, 0).rgba * color;
-		FragColor = textureLod(tex, texCoord, 0).rrra * color;
-	}
-	else if (channel == 2) {
-		FragColor = textureLod(tex, texCoord, 0).ggga * color;
-	}
-	else if (channel == 3) {
-		FragColor = textureLod(tex, texCoord, 0).bbba * color;
-	}
-	else if (channel == 4) {
-		FragColor = textureLod(tex, texCoord, 0).aaaa * color;
-	}
-	else {
-		FragColor = textureLod(tex, texCoord, 0).rgba * color;
-	}
 }

Shaders/painter/glsl/layer_view.frag.glsl

@@ -17,6 +17,9 @@ void main() {
 	else if (channel == 4) {
 		FragColor = textureLod(tex, texCoord, 0).aaaa * color;
 	}
+	else if (channel == 5) {
+		FragColor = textureLod(tex, texCoord, 0).rgba * color;
+	}
 	else {
 		vec4 tex_sample = textureLod(tex, texCoord, 0).rgba;
 		tex_sample.rgb *= tex_sample.a;

Shaders/painter/hlsl/src/layer_copy.frag.hlsl

@@ -1,20 +1,5 @@
 Texture2D<float4> tex;
 SamplerState _tex_sampler;
-uniform int channel;
 float4 main(float4 color : TEXCOORD0, float2 texCoord : TEXCOORD1) : SV_Target0 {
-	if (channel == 1) {
+	return tex.SampleLevel(_tex_sampler, texCoord, 0).rgba * color;
-		return tex.SampleLevel(_tex_sampler, texCoord, 0).rrra * color;
-	}
-	else if (channel == 2) {
-		return tex.SampleLevel(_tex_sampler, texCoord, 0).ggga * color;
-	}
-	else if (channel == 3) {
-		return tex.SampleLevel(_tex_sampler, texCoord, 0).bbba * color;
-	}
-	else if (channel == 4) {
-		return tex.SampleLevel(_tex_sampler, texCoord, 0).aaaa * color;
-	}
-	else {
-		return tex.SampleLevel(_tex_sampler, texCoord, 0).rgba * color;
-	}
 }

Shaders/painter/hlsl/src/layer_view.frag.hlsl

@@ -14,6 +14,9 @@ float4 main(float4 color : TEXCOORD0, float2 texCoord : TEXCOORD1) : SV_Target0
 	else if (channel == 4) {
 		return tex.SampleLevel(_tex_sampler, texCoord, 0).aaaa * color;
 	}
+	else if (channel == 5) {
+		return tex.SampleLevel(_tex_sampler, texCoord, 0).rgba * color;
+	}
 	else {
 		float4 sample = tex.SampleLevel(_tex_sampler, texCoord, 0).rgba;
 		sample.rgb *= sample.a;

Sources/arm/ui/UIView2D.hx

@@ -112,11 +112,12 @@ class UIView2D {
 										    layer.texpaint_pack;
 
 				channel =
-					Context.layerIsMask ? 1 :
+					Context.layerIsMask     ? 1 :
 					texType == TexOcclusion ? 1 :
 					texType == TexRoughness ? 2 :
 					texType == TexMetallic  ? 3 :
 					texType == TexOpacity   ? 4 :
+					texType == TexNormal    ? 5 :
 											  0;
 			}
 			else { // View2DAsset