add black white example

Signed-off-by: Umair Khan <[email protected]>

Author: omerjerk

examples/Capture/BlackWhite/BlachWhite.pde

@@ -0,0 +1,21 @@
+import in.omerjerk.processing.video.android.*;
+
+Capture cap;
+
+PShader bwShader;
+
+void setup() {
+  
+  fullscreen(P2D);
+  
+  cap = new Capture(this);
+  String[] list = cap.list();
+  cap.setCamera(list[0]);
+  cap.start();
+  bwShader = loadShader("fragmentShader.glsl");
+}
+
+void draw() {
+  shader(bwShader);
+  image(cap, 0, 0);
+}

examples/Capture/BlackWhite/data/fragmentShader.glsl

@@ -0,0 +1,23 @@
+#ifdef GL_ES
+precision mediump float;
+precision mediump int;
+#endif
+
+#define PROCESSING_TEXTURE_SHADER
+
+uniform sampler2D texture;
+
+varying vec4 vertColor;
+varying vec4 vertTexCoord;
+
+const vec4 lumcoeff = vec4(0.299, 0.587, 0.114, 0);
+
+void main() {
+  vec4 col = texture2D(texture, vertTexCoord.st);
+  float lum = dot(col, lumcoeff);
+  if (0.5 < lum) {
+    gl_FragColor = vertColor;
+  } else {
+    gl_FragColor = vec4(0, 0, 0, 1);
+  }     
+}