272         GLint xoffset, GLint yoffset,  in copyPixels()  argument
282         ((xoffset|yoffset) == 0))  in copyPixels()
300     ggl->texCoord2i(ggl, x-xoffset, y-yoffset);  in copyPixels()
301     ggl->recti(ggl, xoffset, yoffset, xoffset+w, yoffset+h);  in copyPixels()
1237         GLint yoffset, GLsizei width, GLsizei height,  in glTexSubImage2D()  argument
1245     if (xoffset<0 || yoffset<0 || width<0 || height<0 || level<0) {  in glTexSubImage2D()
1268         (yoffset + height > GLsizei(surface.height))) {  in glTexSubImage2D()
1298             surface, xoffset, yoffset,  in glTexSubImage2D()
1421         GLenum target, GLint level, GLint xoffset, GLint yoffset,  in glCopyTexSubImage2D()  argument
1429     if (xoffset<0 || yoffset<0 || width<0 || height<0 || level<0) {  in glCopyTexSubImage2D()
1447         (yoffset + height > GLsizei(surface.height))) {  in glCopyTexSubImage2D()
1472             txSurface, xoffset, yoffset,  in glCopyTexSubImage2D()