void GL_SetupView_Mode_Perspective(double fovx, double fovy, double zNear, double zFar);
void GL_SetupView_Mode_PerspectiveInfiniteFarClip(double fovx, double fovy, double zNear);
void GL_SetupView_Mode_Ortho(double x1, double y1, double x2, double y2, double zNear, double zFar);
void GL_BlendFunc(int blendfunc1, int blendfunc2);
void GL_DepthMask(int state);
void GL_DepthTest(int state);
void GL_SetupView_Mode_Perspective(double fovx, double fovy, double zNear, double zFar);
void GL_SetupView_Mode_PerspectiveInfiniteFarClip(double fovx, double fovy, double zNear);
void GL_SetupView_Mode_Ortho(double x1, double y1, double x2, double y2, double zNear, double zFar);
void GL_BlendFunc(int blendfunc1, int blendfunc2);
void GL_DepthMask(int state);
void GL_DepthTest(int state);