void Clear(float r=1.0, float g=1.0, float b=1.0, float a=1.0);
int GetWidth() { return m_width; }
int GetHeight() { return m_height; }
void Clear(float r=1.0, float g=1.0, float b=1.0, float a=1.0);
int GetWidth() { return m_width; }
int GetHeight() { return m_height; }