Android VideoRendererGui: Refactor GLES rendering

talk/app/webrtc/java/android/org/webrtc/GlShader.java

Index: talk/app/webrtc/java/android/org/webrtc/GlShader.java
diff --git a/talk/app/webrtc/java/android/org/webrtc/GlShader.java b/talk/app/webrtc/java/android/org/webrtc/GlShader.java
index 712af2b4469ea3b4da0829616c29a2756a877321..3014aab407e81f75b1c6e0097774a83633a0d62c 100644
--- a/talk/app/webrtc/java/android/org/webrtc/GlShader.java
+++ b/talk/app/webrtc/java/android/org/webrtc/GlShader.java
@@ -30,6 +30,8 @@ package org.webrtc;
 import android.opengl.GLES20;
 import android.util.Log;
 
+import java.nio.FloatBuffer;
+
 // Helper class for handling OpenGL shaders and shader programs.
 public class GlShader {
   private static final String TAG = "GlShader";
@@ -88,6 +90,20 @@ public class GlShader {
     return location;
   }
 
+  /**
+   * Enable and upload a vertex array for attribute |label|. The vertex data is specified in
+   * |buffer| with |dimension| number of components per vertex.
+   */
+  public void setVertexAttribArray(String label, int dimension, FloatBuffer buffer) {
+    if (program == -1) {
+      throw new RuntimeException("The program has been released");
+    }
+    int location = getAttribLocation(label);
+    GLES20.glEnableVertexAttribArray(location);
+    GLES20.glVertexAttribPointer(location, dimension, GLES20.GL_FLOAT, false, 0, buffer);
+    GlUtil.checkNoGLES2Error("setVertexAttribArray");
+  }
+
   public int getUniformLocation(String label) {
     if (program == -1) {
       throw new RuntimeException("The program has been released");