void R_Viewport_InitRectSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, int border, float nearclip, float farclip, const float *nearplane);
void R_SetViewport(const r_viewport_t *v);
void R_GetViewport(r_viewport_t *v);
void R_Viewport_InitRectSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, int border, float nearclip, float farclip, const float *nearplane);
void R_SetViewport(const r_viewport_t *v);
void R_GetViewport(r_viewport_t *v);