Texture pipeline, pixel-art shader

assets/shaders.glsl

@@ -141,10 +141,22 @@ vec3 lightOutgoingRadiance(
     return (scatteredFactor + reflectedFactor) * incomingRadiance * dotNL;
 }
 
+vec4 texture2DArrayAA(texture2DArray tex, vec2 texCoord) {
+    vec2 size = vec2(textureSize(sampler2DArray(tex, _Sampler), 0).xy);
+    vec2 texCoordPX = texCoord * size;
+    vec2 seam = floor(texCoordPX + vec2(0.5));
+
+    texCoordPX = (texCoordPX - seam) / fwidth(texCoordPX) + seam;
+    texCoordPX = clamp(texCoordPX, seam - 0.5, seam + 0.5);
+
+    vec3 texCoord3 = vec3(texCoordPX / size, float(_TextureIndex));
+    return texture(sampler2DArray(tex, _Sampler), texCoord3);
+}
+
 void main() {
-    vec4 baseColorTexel = texture(sampler2DArray(_BaseColorTexture, _Sampler), vec3(var_texCoord, float(_TextureIndex)));
-    vec4 occlusionRoughnessMetallicTexel = texture(sampler2DArray(_OcclusionRoughnessMetallicTexture, _Sampler), vec3(var_texCoord, float(_TextureIndex)));
-    vec4 normalTextureTexel = texture(sampler2DArray(_NormalTexture, _Sampler), vec3(var_texCoord, float(_TextureIndex)));
+    vec4 baseColorTexel = texture2DArrayAA(_BaseColorTexture, var_texCoord);
+    vec4 occlusionRoughnessMetallicTexel = texture2DArrayAA(_OcclusionRoughnessMetallicTexture, var_texCoord);
+    vec4 normalTextureTexel = texture2DArrayAA(_NormalTexture, var_texCoord);
 
     vec3 baseColor = baseColorTexel.rgb;
     float occlusion = occlusionRoughnessMetallicTexel.r;