1 files changed, 30 insertions, 0 deletions
diff --git a/samples/post-processing/shaders/sobel.jsl b/samples/post-processing/shaders/sobel.jsl
new file mode 100644
index 0000000..7700dee
--- /dev/null
+++ b/samples/post-processing/shaders/sobel.jsl
@@ -0,0 +1,30 @@
+#VERTEX_SHADER
+Vertex vert(Vertex v)
+{
+	return v;
+}
+#END_VERTEX_SHADER
+#FRAGMENT_SHADER
+Color frag(Color col, Texture texture, Vertex v)
+{
+      float x = 1.0 / jin_RenderTargetSize.x;
+      float y = 1.0 / jin_RenderTargetSize.y;
+      vec4 horizEdge = vec4( 0.0 );
+      horizEdge -= texture2D( texture, vec2( v.uv.x - x, v.uv.y - y ) ) * 1.0;
+      horizEdge -= texture2D( texture, vec2( v.uv.x - x, v.uv.y     ) ) * 2.0;
+      horizEdge -= texture2D( texture, vec2( v.uv.x - x, v.uv.y + y ) ) * 1.0;
+      horizEdge += texture2D( texture, vec2( v.uv.x + x, v.uv.y - y ) ) * 1.0;
+      horizEdge += texture2D( texture, vec2( v.uv.x + x, v.uv.y     ) ) * 2.0;
+      horizEdge += texture2D( texture, vec2( v.uv.x + x, v.uv.y + y ) ) * 1.0;
+      vec4 vertEdge = vec4( 0.0 );
+      vertEdge -= texture2D( texture, vec2( v.uv.x - x, v.uv.y - y ) ) * 1.0;
+      vertEdge -= texture2D( texture, vec2( v.uv.x    , v.uv.y - y ) ) * 2.0;
+      vertEdge -= texture2D( texture, vec2( v.uv.x + x, v.uv.y - y ) ) * 1.0;
+      vertEdge += texture2D( texture, vec2( v.uv.x - x, v.uv.y + y ) ) * 1.0;
+      vertEdge += texture2D( texture, vec2( v.uv.x    , v.uv.y + y ) ) * 2.0;
+      vertEdge += texture2D( texture, vec2( v.uv.x + x, v.uv.y + y ) ) * 1.0;
+      vec3 edge = sqrt((horizEdge.rgb * horizEdge.rgb) + (vertEdge.rgb * vertEdge.rgb));
+
+      return vec4(edge, texture2D(texture, v.uv.xy).a);
+}
+#END_FRAGMENT_SHADER
+\ No newline at end of file