shadowmap_*.glsl: added texture2DCompare()

src/renderers/shaders/ShaderChunk/shadowmap_fragment.glsl

@@ -112,15 +112,15 @@ vec3 shadowMask = vec3( 1.0 );
 				float dx1 = + texelSizeX;
 				float dy1 = + texelSizeY;
 
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy0 ) ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy0 ) ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy0 ) ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, 0.0 ) ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, 0.0 ) ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy1 ) ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy1 ) ) ), shadowCoord.z );
-				shadow += step( unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy1 ) ) ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy, shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z );
+				shadow += texture2DCompare( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z );
 				shadow *= 1.0 / 9.0;
 
 				shadow *= shadowDarkness[ i ];
@@ -170,8 +170,7 @@ vec3 shadowMask = vec3( 1.0 );
 
 	#else // no percentage-closer filtering:
 
-				vec4 rgbaDepth = texture2D( shadowMap[ i ], shadowCoord.xy );
-				shadow = step( unpackDepth( rgbaDepth ), shadowCoord.z ) * shadowDarkness[ i ];
+				shadow = texture2DCompare( shadowMap[ i ], shadowCoord.xy, shadowCoord.z ) * shadowDarkness[ i ];
 
 	#endif
 

src/renderers/shaders/ShaderChunk/shadowmap_pars_fragment.glsl

@@ -11,8 +11,13 @@
 	float unpackDepth( const in vec4 rgba_depth ) {
 
 		const vec4 bit_shift = vec4( 1.0 / ( 256.0 * 256.0 * 256.0 ), 1.0 / ( 256.0 * 256.0 ), 1.0 / 256.0, 1.0 );
-		float depth = dot( rgba_depth, bit_shift );
-		return depth;
+		return dot( rgba_depth, bit_shift );
+
+	}
+
+	float texture2DCompare( sampler2D depths, vec2 uv, float compare ) {
+
+		return step( unpackDepth( texture2D( depths, uv ) ), compare );
 
 	}