diff options
Diffstat (limited to 'viewport.c')
| -rw-r--r-- | viewport.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/viewport.c b/viewport.c new file mode 100644 index 0000000..34bc486 --- /dev/null +++ b/viewport.c @@ -0,0 +1,129 @@ +/* Copyright (c) 2008, 2009 + * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) + * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) + * Micah Cowan (micah@cowan.name) + * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net) + * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007 + * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) + * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) + * Copyright (c) 1987 Oliver Laumann + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program (see the file COPYING); if not, see + * https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA + * + **************************************************************** + */ + +#include "config.h" +#include "screen.h" +#include "extern.h" +#include "viewport.h" + +extern struct display *display; + +int RethinkDisplayViewports() { + struct canvas *cv; + struct viewport *vp, *vpn; + + /* free old viewports */ + for (cv = display->d_cvlist; cv; cv = cv->c_next) { + for (vp = cv->c_vplist; vp; vp = vpn) { + vp->v_canvas = 0; + vpn = vp->v_next; + bzero((char *)vp, sizeof(*vp)); + free(vp); + } + cv->c_vplist = 0; + } + display->d_vpxmin = -1; + display->d_vpxmax = -1; + + for (cv = display->d_cvlist; cv; cv = cv->c_next) { + if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0) + return -1; +#ifdef HOLE + vp->v_canvas = cv; + vp->v_xs = cv->c_xs; + vp->v_ys = (cv->c_ys + cv->c_ye) / 2; + vp->v_xe = cv->c_xe; + vp->v_ye = cv->c_ye; + vp->v_xoff = cv->c_xoff; + vp->v_yoff = cv->c_yoff; + vp->v_next = cv->c_vplist; + cv->c_vplist = vp; + + if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0) + return -1; + vp->v_canvas = cv; + vp->v_xs = (cv->c_xs + cv->c_xe) / 2; + vp->v_ys = (3 * cv->c_ys + cv->c_ye) / 4; + vp->v_xe = cv->c_xe; + vp->v_ye = (cv->c_ys + cv->c_ye) / 2 - 1; + vp->v_xoff = cv->c_xoff; + vp->v_yoff = cv->c_yoff; + vp->v_next = cv->c_vplist; + cv->c_vplist = vp; + + if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0) + return -1; + vp->v_canvas = cv; + vp->v_xs = cv->c_xs; + vp->v_ys = (3 * cv->c_ys + cv->c_ye) / 4; + vp->v_xe = (3 * cv->c_xs + cv->c_xe) / 4 - 1; + vp->v_ye = (cv->c_ys + cv->c_ye) / 2 - 1; + vp->v_xoff = cv->c_xoff; + vp->v_yoff = cv->c_yoff; + vp->v_next = cv->c_vplist; + cv->c_vplist = vp; + + if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0) + return -1; + vp->v_canvas = cv; + vp->v_xs = cv->c_xs; + vp->v_ys = cv->c_ys; + vp->v_xe = cv->c_xe; + vp->v_ye = (3 * cv->c_ys + cv->c_ye) / 4 - 1; + vp->v_xoff = cv->c_xoff; + vp->v_yoff = cv->c_yoff; + vp->v_next = cv->c_vplist; + cv->c_vplist = vp; +#else + vp->v_canvas = cv; + vp->v_xs = cv->c_xs; + vp->v_ys = cv->c_ys; + vp->v_xe = cv->c_xe; + vp->v_ye = cv->c_ye; + vp->v_xoff = cv->c_xoff; + vp->v_yoff = cv->c_yoff; + vp->v_next = cv->c_vplist; + cv->c_vplist = vp; +#endif + + if (cv->c_xs < display->d_vpxmin || display->d_vpxmin == -1) + display->d_vpxmin = cv->c_xs; + if (cv->c_xe > display->d_vpxmax || display->d_vpxmax == -1) + display->d_vpxmax = cv->c_xe; + } + return 0; +} + +void RethinkViewportOffsets(struct canvas *cv) +{ + struct viewport *vp; + for (vp = cv->c_vplist; vp; vp = vp->v_next) { + vp->v_xoff = cv->c_xoff; + vp->v_yoff = cv->c_yoff; + } +} |