Added support for Multisampling to RenderBuffer

* Extended RenderBufferControl accordingly

include/ACGL/OpenGL/Controller/RenderBufferControl.hh

@@ -24,6 +24,7 @@ public:
     RenderBufferControl(void)
     :   mWidth(0),
         mHeight(0),
+        mSamples(0),
         mInternalFormat()
     {}
     virtual ~RenderBufferControl() {}
@@ -32,8 +33,10 @@ public:
     // ============================================================================================ METHODS \/
     // ==================================================================================================== \/
 public:
-    inline RenderBufferControl& size           (GLsizei _width, GLsizei _height) { mWidth = _width; mHeight = _height; return *this; }
-    inline RenderBufferControl& internalFormat (GLenum _internalFormat)          { mInternalFormat = _internalFormat;  return *this; }
+    inline RenderBufferControl& size           (GLsizei _width, GLsizei _height)                   { mWidth = _width; mHeight = _height; return *this; }
+    inline RenderBufferControl& size           (GLsizei _width, GLsizei _height, GLsizei _samples) { mWidth = _width; mHeight = _height; mSamples = _samples; return *this; }
+    inline RenderBufferControl& samples        (GLsizei _samples)                                  { mSamples = _samples; return *this; }
+    inline RenderBufferControl& internalFormat (GLenum _internalFormat)                            { mInternalFormat = _internalFormat;  return *this; }
 
     // ===================================================================================================== \/
     // ============================================================================================ OVERRIDE \/
@@ -42,7 +45,7 @@ public:
     virtual SharedRenderBuffer create(void)
     {
         SharedRenderBuffer renderBuffer(new RenderBuffer(mInternalFormat));
-        renderBuffer->setSize(mWidth, mHeight);
+        renderBuffer->setSize(mWidth, mHeight, mSamples);
         return renderBuffer;
     }
 
@@ -52,6 +55,7 @@ public:
 protected:
     GLsizei mWidth;
     GLsizei mHeight;
+    GLsizei mSamples;
     GLenum  mInternalFormat;
 };
 

include/ACGL/OpenGL/Objects/RenderBuffer.hh

@@ -30,7 +30,8 @@ public:
     :   mObjectName(0),
         mInternalFormat(_internalFormat),
         mWidth(0),
-        mHeight(0)
+        mHeight(0),
+        mSamples(0)
     {
         glGenRenderbuffers(1, &mObjectName);
         if (openGLCriticalErrorOccured() ) {
@@ -55,10 +56,23 @@ public:
     inline GLsizei getWidth          (void) const { return mWidth;          }
     inline GLsizei getHeight         (void) const { return mHeight;         }
 
+    // ==================================================================================================== \/
+    // ============================================================================================ METHODS \/
+    // ==================================================================================================== \/
+public:
+    //! Get the actual number of samples
+    inline int_t getSamples(void) const
+    {
+        glBindRenderbuffer(GL_RENDERBUFFER, mObjectName);
+        GLint samples;
+        glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);
+        return (int_t)samples;
+    }
+
     // ===================================================================================================== \/
     // ============================================================================================ WRAPPERS \/
     // ===================================================================================================== \/
-public:
+public:    
     //! Bind the renderbuffer
     inline void bind(void) const
     {
@@ -68,12 +82,20 @@ public:
     //! Set texture size and NULL data
     inline void setSize(
         GLsizei _width,
-        GLsizei _height)
+        GLsizei _height,
+        GLsizei _samples = 0)
     {
         mWidth = _width;
         mHeight = _height;
+        mSamples = _samples;
         glBindRenderbuffer(GL_RENDERBUFFER, mObjectName);
+
+#if (ACGL_OPENGL_VERSION >= 30)
+        glRenderbufferStorageMultisample(GL_RENDERBUFFER, mSamples, mInternalFormat, mWidth, mHeight);
+#else
         glRenderbufferStorage(GL_RENDERBUFFER, mInternalFormat, mWidth, mHeight);
+#endif // OpenGL >= 3.0
+
     }
 
     // =================================================================================================== \/
@@ -84,6 +106,7 @@ protected:
     GLenum  mInternalFormat;
     GLsizei mWidth;
     GLsizei mHeight;
+    GLsizei mSamples;
 };
 
 ACGL_SHARED_TYPEDEF(RenderBuffer)