Director supports setting clear color

cocos/base/CCDirector.cpp

@@ -158,6 +158,12 @@ bool Director::init(void)
 
     _console = new (std::nothrow) Console;
     
+    // default clear color
+    _clearColor.r = 0;
+    _clearColor.g = 0;
+    _clearColor.b = 0;
+    _clearColor.a = 1.0;
+
     return true;
 }
 
@@ -242,7 +248,7 @@ void Director::setGLDefaultValues()
     setProjection(_projection);
 
     // set other opengl default values
-    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+    glClearColor(_clearColor.r, _clearColor.g, _clearColor.b, _clearColor.a);
 }
 
 // Draw the Scene
@@ -705,6 +711,12 @@ void Director::setDepthTest(bool on)
     CHECK_GL_ERROR_DEBUG();
 }
 
+void Director::setClearColor(const Color4F& clearColor)
+{
+    _clearColor = clearColor;
+    glClearColor(clearColor.r, clearColor.g, clearColor.b, clearColor.a);
+}
+
 static void GLToClipTransform(Mat4 *transformOut)
 {
     if(nullptr == transformOut) return;

cocos/base/CCDirector.h

@@ -323,6 +323,9 @@ public:
     /** enables/disables OpenGL alpha blending */
     void setAlphaBlending(bool on);
     
+    /** set clear values for the color buffers, value range of each element is [0.0, 1.0] */
+    void setClearColor(const Color4F& clearColor);
+
     /** enables/disables OpenGL depth test */
     void setDepthTest(bool on);
 
@@ -463,6 +466,9 @@ protected:
     unsigned int _totalFrames;
     float _secondsPerFrame;
     
+    /* clear color set outside be used in setGLDefaultValues() */
+    Color4F _clearColor;
+    
     /* The running scene */
     Scene *_runningScene;