void gl_ClearAccum(GLcontext *ctx, GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha)
void gl_alloc_accum_buffer(GLcontext *ctx)
void gl_Accum(GLcontext *ctx, GLenum op, GLfloat value)
void gl_clear_accum_buffer(GLcontext *ctx)
GLclampf GLclampf GLclampf alpha
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte red