Actual source code: dviewp.c
2: /*
3: Provides the calling sequences for all the basic PetscDraw routines.
4: */
5: #include <petsc/private/drawimpl.h>
7: /*@
8: PetscDrawSetViewPort - Sets the portion of the window (page) to which draw
9: routines will write.
11: Collective on PetscDraw
13: Input Parameters:
14: + xl - the horizontal coordinate of the lower left corner of the subwindow.
15: . yl - the vertical coordinate of the lower left corner of the subwindow.
16: . xr - the horizontal coordinate of the upper right corner of the subwindow.
17: . yr - the vertical coordinate of the upper right corner of the subwindow.
18: - draw - the drawing context
20: Notes:
21: These numbers must always be between 0.0 and 1.0.
22: Lower left corner is (0,0).
24: Level: advanced
26: @*/
27: PetscErrorCode PetscDrawSetViewPort(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr)
28: {
31: draw->port_xl = xl; draw->port_yl = yl;
32: draw->port_xr = xr; draw->port_yr = yr;
33: if (draw->ops->setviewport) {
34: (*draw->ops->setviewport)(draw,xl,yl,xr,yr);
35: }
36: return 0;
37: }
39: /*@
40: PetscDrawGetViewPort - Gets the portion of the window (page) to which draw
41: routines will write.
43: Collective on PetscDraw
45: Input Parameter:
46: . draw - the drawing context
48: Output Parameters:
49: + xl - the horizontal coordinate of the lower left corner of the subwindow.
50: . yl - the vertical coordinate of the lower left corner of the subwindow.
51: . xr - the horizontal coordinate of the upper right corner of the subwindow.
52: - yr - the vertical coordinate of the upper right corner of the subwindow.
54: Notes:
55: These numbers must always be between 0.0 and 1.0.
56: Lower left corner is (0,0).
58: Level: advanced
60: @*/
61: PetscErrorCode PetscDrawGetViewPort(PetscDraw draw,PetscReal *xl,PetscReal *yl,PetscReal *xr,PetscReal *yr)
62: {
68: *xl = draw->port_xl;
69: *yl = draw->port_yl;
70: *xr = draw->port_xr;
71: *yr = draw->port_yr;
72: return 0;
73: }
75: /*@
76: PetscDrawSplitViewPort - Splits a window shared by several processes into smaller
77: view ports. One for each process.
79: Collective on PetscDraw
81: Input Parameter:
82: . draw - the drawing context
84: Level: advanced
86: .seealso: PetscDrawDivideViewPort(), PetscDrawSetViewPort()
88: @*/
89: PetscErrorCode PetscDrawSplitViewPort(PetscDraw draw)
90: {
91: PetscMPIInt rank,size;
92: PetscInt n;
93: PetscBool isnull;
94: PetscReal xl,xr,yl,yr,h;
98: PetscDrawIsNull(draw,&isnull);
99: if (isnull) return 0;
100: MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
101: MPI_Comm_size(PetscObjectComm((PetscObject)draw),&size);
103: n = (PetscInt)(.1 + PetscSqrtReal((PetscReal)size));
104: while (n*n < size) n++;
106: h = 1.0/n;
107: xl = (rank % n)*h;
108: xr = xl + h;
109: yl = (rank / n)*h;
110: yr = yl + h;
112: PetscDrawCollectiveBegin(draw);
113: PetscDrawLine(draw,xl,yl,xl,yr,PETSC_DRAW_BLACK);
114: PetscDrawLine(draw,xl,yr,xr,yr,PETSC_DRAW_BLACK);
115: PetscDrawLine(draw,xr,yr,xr,yl,PETSC_DRAW_BLACK);
116: PetscDrawLine(draw,xr,yl,xl,yl,PETSC_DRAW_BLACK);
117: PetscDrawCollectiveEnd(draw);
118: PetscDrawFlush(draw);
120: draw->port_xl = xl + .05*h;
121: draw->port_xr = xr - .05*h;
122: draw->port_yl = yl + .05*h;
123: draw->port_yr = yr - .05*h;
125: if (draw->ops->setviewport) (*draw->ops->setviewport)(draw,xl,yl,xr,yr);
126: return 0;
127: }
129: /*@C
130: PetscDrawViewPortsCreate - Splits a window into smaller view ports. Each processor shares all the viewports.
132: Collective on PetscDraw
134: Input Parameters:
135: + draw - the drawing context
136: - nports - the number of ports
138: Output Parameter:
139: . ports - a PetscDrawViewPorts context (C structure)
141: Options Database:
142: . -draw_ports - display multiple fields in the same window with PetscDrawPorts() instead of in separate windows
144: Level: advanced
146: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsDestroy()
148: @*/
149: PetscErrorCode PetscDrawViewPortsCreate(PetscDraw draw,PetscInt nports,PetscDrawViewPorts **newports)
150: {
151: PetscDrawViewPorts *ports;
152: PetscInt i,n;
153: PetscBool isnull;
154: PetscMPIInt rank;
155: PetscReal *xl,*xr,*yl,*yr,h;
156: PetscErrorCode ierr;
161: PetscDrawIsNull(draw,&isnull);
162: if (isnull) {*newports = NULL; return 0;}
163: MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
165: PetscNew(&ports); *newports = ports;
166: ports->draw = draw;
167: ports->nports = nports;
168: PetscObjectReference((PetscObject)draw);
169: /* save previous drawport of window */
170: PetscDrawGetViewPort(draw,&ports->port_xl,&ports->port_yl,&ports->port_xr,&ports->port_yr);
172: n = (PetscInt)(.1 + PetscSqrtReal((PetscReal)nports));
173: while (n*n < nports) n++;
174: h = 1.0/n;
176: PetscMalloc4(n*n,&xl,n*n,&xr,n*n,&yl,n*n,&yr);
177: ports->xl = xl;
178: ports->xr = xr;
179: ports->yl = yl;
180: ports->yr = yr;
182: PetscDrawSetCoordinates(draw,0.0,0.0,1.0,1.0);
183: PetscDrawCollectiveBegin(draw);
184: for (i=0; i<n*n; i++) {
185: xl[i] = (i % n)*h;
186: xr[i] = xl[i] + h;
187: yl[i] = (i / n)*h;
188: yr[i] = yl[i] + h;
190: if (rank == 0) {
191: PetscDrawLine(draw,xl[i],yl[i],xl[i],yr[i],PETSC_DRAW_BLACK);
192: PetscDrawLine(draw,xl[i],yr[i],xr[i],yr[i],PETSC_DRAW_BLACK);
193: PetscDrawLine(draw,xr[i],yr[i],xr[i],yl[i],PETSC_DRAW_BLACK);
194: PetscDrawLine(draw,xr[i],yl[i],xl[i],yl[i],PETSC_DRAW_BLACK);
195: }
197: xl[i] += .05*h;
198: xr[i] -= .05*h;
199: yl[i] += .05*h;
200: yr[i] -= .05*h;
201: }
202: PetscDrawCollectiveEnd(draw);
203: PetscDrawFlush(draw);
204: return 0;
205: }
207: /*@C
208: PetscDrawViewPortsCreateRect - Splits a window into smaller
209: view ports. Each processor shares all the viewports. The number
210: of views in the x- and y-directions is specified.
212: Collective on PetscDraw
214: Input Parameters:
215: + draw - the drawing context
216: . nx - the number of x divisions
217: - ny - the number of y divisions
219: Output Parameter:
220: . ports - a PetscDrawViewPorts context (C structure)
222: Level: advanced
224: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsDestroy()
226: @*/
227: PetscErrorCode PetscDrawViewPortsCreateRect(PetscDraw draw,PetscInt nx,PetscInt ny,PetscDrawViewPorts **newports)
228: {
229: PetscDrawViewPorts *ports;
230: PetscReal *xl,*xr,*yl,*yr,hx,hy;
231: PetscInt i,j,k,n;
232: PetscBool isnull;
233: PetscMPIInt rank;
234: PetscErrorCode ierr;
239: PetscDrawIsNull(draw,&isnull);
240: if (isnull) {*newports = NULL; return 0;}
241: MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
243: n = nx*ny;
244: hx = 1.0/nx;
245: hy = 1.0/ny;
246: PetscNew(&ports); *newports = ports;
247: ports->draw = draw;
248: ports->nports = n;
249: PetscObjectReference((PetscObject) draw);
250: /* save previous drawport of window */
251: PetscDrawGetViewPort(draw,&ports->port_xl,&ports->port_yl,&ports->port_xr,&ports->port_yr);
253: PetscMalloc4(n,&xl,n,&xr,n,&yl,n,&yr);
254: ports->xr = xr;
255: ports->xl = xl;
256: ports->yl = yl;
257: ports->yr = yr;
259: PetscDrawSetCoordinates(draw,0.0,0.0,1.0,1.0);
260: PetscDrawCollectiveBegin(draw);
261: for (i = 0; i < nx; i++) {
262: for (j = 0; j < ny; j++) {
263: k = j*nx+i;
265: xl[k] = i*hx;
266: xr[k] = xl[k] + hx;
267: yl[k] = j*hy;
268: yr[k] = yl[k] + hy;
270: if (rank == 0) {
271: PetscDrawLine(draw,xl[k],yl[k],xl[k],yr[k],PETSC_DRAW_BLACK);
272: PetscDrawLine(draw,xl[k],yr[k],xr[k],yr[k],PETSC_DRAW_BLACK);
273: PetscDrawLine(draw,xr[k],yr[k],xr[k],yl[k],PETSC_DRAW_BLACK);
274: PetscDrawLine(draw,xr[k],yl[k],xl[k],yl[k],PETSC_DRAW_BLACK);
275: }
277: xl[k] += .05*hx;
278: xr[k] -= .05*hx;
279: yl[k] += .05*hy;
280: yr[k] -= .05*hy;
281: }
282: }
283: PetscDrawCollectiveEnd(draw);
284: PetscDrawFlush(draw);
285: return 0;
286: }
288: /*@C
289: PetscDrawViewPortsDestroy - frees a PetscDrawViewPorts object
291: Collective on PetscDraw inside PetscDrawViewPorts
293: Input Parameter:
294: . ports - the PetscDrawViewPorts object
296: Level: advanced
298: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsSet(), PetscDrawViewPortsCreate()
300: @*/
301: PetscErrorCode PetscDrawViewPortsDestroy(PetscDrawViewPorts *ports)
302: {
303: if (!ports) return 0;
305: /* reset Drawport of Window back to previous value */
306: PetscDrawSetViewPort(ports->draw,ports->port_xl,ports->port_yl,ports->port_xr,ports->port_yr);
307: PetscDrawDestroy(&ports->draw);
308: PetscFree4(ports->xl,ports->xr,ports->yl,ports->yr);
309: PetscFree(ports);
310: return 0;
311: }
313: /*@C
314: PetscDrawViewPortsSet - sets a draw object to use a particular subport
316: Logically Collective on PetscDraw inside PetscDrawViewPorts
318: Input Parameters:
319: + ports - the PetscDrawViewPorts object
320: - port - the port number, from 0 to nports-1
322: Level: advanced
324: .seealso: PetscDrawSplitViewPort(), PetscDrawSetViewPort(), PetscDrawViewPortsDestroy(), PetscDrawViewPortsCreate()
326: @*/
327: PetscErrorCode PetscDrawViewPortsSet(PetscDrawViewPorts *ports,PetscInt port)
328: {
329: if (!ports) return 0;
332: PetscDrawSetViewPort(ports->draw,ports->xl[port],ports->yl[port],ports->xr[port],ports->yr[port]);
333: return 0;
334: }