now clearing all buffers

CMakeLists.txt

 
 include_directories("${PROJECT_BINARY_DIR}")
 
-add_definitions(-DSLOP_VERSION="v5.3.23")
+add_definitions(-DSLOP_VERSION="v5.3.24")
 
 # The names have to be unique unfortunately.
 set(EXECUTABLE_NAME "slop")

src/framebuffer.cpp

 }
 
 void slop::Framebuffer::draw(){
+    glEnable( GL_BLEND );
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
     shader->bind();
     shader->setParameter( "texture", 0 );
     shader->setAttribute( "position", buffers[0], 2 );
     glEnable( GL_TEXTURE_2D );
     glDrawArrays( GL_TRIANGLES, 0, vertCount );
     glDisable( GL_TEXTURE_2D );
+    glDisable( GL_BLEND );
     shader->unbind();
 }

src/slop.cpp

         window->framebuffer->unbind();
 
         // Then we draw the framebuffer to the screen
+        glClearColor (0.0, 0.0, 0.0, 0.0);
+        glClear (GL_COLOR_BUFFER_BIT);
         window->framebuffer->draw();
         window->display();
         GLenum err = glGetError();