1: /*
  2:     Defines the operations for the TikZ PetscDraw implementation.
  3: */

  5: #include <petsc/private/drawimpl.h>

  7: typedef struct {
  8:   char     *filename;
  9:   FILE     *fd;
 10:   PetscBool written; /* something has been written to the current frame */
 11: } PetscDraw_TikZ;

 13: #define TikZ_BEGIN_DOCUMENT \
 14:   "\\documentclass{beamer}\n\n\
 15: \\usepackage{tikz}\n\
 16: \\usepackage{pgflibraryshapes}\n\
 17: \\usetikzlibrary{backgrounds}\n\
 18: \\usetikzlibrary{arrows}\n\
 19: \\newenvironment{changemargin}[2]{%%\n\
 20:   \\begin{list}{}{%%\n\
 21:     \\setlength{\\topsep}{0pt}%%\n\
 22:     \\setlength{\\leftmargin}{#1}%%\n\
 23:     \\setlength{\\rightmargin}{#2}%%\n\
 24:     \\setlength{\\listparindent}{\\parindent}%%\n\
 25:     \\setlength{\\itemindent}{\\parindent}%%\n\
 26:     \\setlength{\\parsep}{\\parskip}%%\n\
 27:   }%%\n\
 28:   \\item[]}{\\end{list}}\n\n\
 29: \\begin{document}\n"

 31: #define TikZ_BEGIN_FRAME \
 32:   "\\begin{frame}{}\n\
 33: \\begin{changemargin}{-1cm}{0cm}\n\
 34: \\begin{center}\n\
 35: \\begin{tikzpicture}[scale = 10.00,font=\\fontsize{8}{8}\\selectfont]\n"

 37: #define TikZ_END_FRAME \
 38:   "\\end{tikzpicture}\n\
 39: \\end{center}\n\
 40: \\end{changemargin}\n\
 41: \\end{frame}\n"

 43: #define TikZ_END_DOCUMENT "\\end{document}\n"

 45: static PetscErrorCode PetscDrawDestroy_TikZ(PetscDraw draw)
 46: {
 47:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;

 49:   PetscFunctionBegin;
 50:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, TikZ_END_FRAME));
 51:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, TikZ_END_DOCUMENT));
 52:   PetscCall(PetscFClose(PetscObjectComm((PetscObject)draw), win->fd));
 53:   PetscCall(PetscFree(win->filename));
 54:   PetscCall(PetscFree(draw->data));
 55:   PetscFunctionReturn(PETSC_SUCCESS);
 56: }

 58: static const char *TikZColors[] = {"white", "black", "red", "green", "cyan", "blue", "magenta", NULL, NULL, "orange", "violet", "brown", "pink", NULL, "yellow", NULL};

 60: static inline const char *TikZColorMap(int cl)
 61: {
 62:   return (cl < 16) ? (TikZColors[cl] ? TikZColors[cl] : "black") : "black";
 63: }

 65: /*
 66:      These macros transform from the users coordinates to the (0,0) -> (1,1) coordinate system
 67: */
 68: #define XTRANS(draw, x) (double)((draw)->port_xl + (((x - (draw)->coor_xl) * ((draw)->port_xr - (draw)->port_xl)) / ((draw)->coor_xr - (draw)->coor_xl)))
 69: #define YTRANS(draw, y) (double)((draw)->port_yl + (((y - (draw)->coor_yl) * ((draw)->port_yr - (draw)->port_yl)) / ((draw)->coor_yr - (draw)->coor_yl)))

 71: static PetscErrorCode PetscDrawClear_TikZ(PetscDraw draw)
 72: {
 73:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;
 74:   PetscBool       written;

 76:   PetscFunctionBegin;
 77:   /* often PETSc generates unneeded clears, we want avoid creating empty pictures for them */
 78:   PetscCall(MPIU_Allreduce(&win->written, &written, 1, MPIU_BOOL, MPI_LOR, PetscObjectComm((PetscObject)draw)));
 79:   if (!written) PetscFunctionReturn(PETSC_SUCCESS);
 80:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, TikZ_END_FRAME));
 81:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, TikZ_BEGIN_FRAME));
 82:   win->written = PETSC_FALSE;
 83:   PetscFunctionReturn(PETSC_SUCCESS);
 84: }

 86: static PetscErrorCode PetscDrawLine_TikZ(PetscDraw draw, PetscReal xl, PetscReal yl, PetscReal xr, PetscReal yr, int cl)
 87: {
 88:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;

 90:   PetscFunctionBegin;
 91:   win->written = PETSC_TRUE;
 92:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, "\\draw [%s] (%g,%g) --(%g,%g);\n", TikZColorMap(cl), XTRANS(draw, xl), YTRANS(draw, yl), XTRANS(draw, xr), YTRANS(draw, yr)));
 93:   PetscFunctionReturn(PETSC_SUCCESS);
 94: }

 96: static PetscErrorCode PetscDrawRectangle_TikZ(PetscDraw draw, PetscReal xl, PetscReal yl, PetscReal xr, PetscReal yr, int c1, int c2, int c3, int c4)
 97: {
 98:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;

100:   PetscFunctionBegin;
101:   win->written = PETSC_TRUE;
102:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, "\\fill [bottom color=%s,top color=%s] (%g,%g) rectangle (%g,%g);\n", TikZColorMap(c1), TikZColorMap(c4), XTRANS(draw, xl), YTRANS(draw, yl), XTRANS(draw, xr), YTRANS(draw, yr)));
103:   PetscFunctionReturn(PETSC_SUCCESS);
104: }

106: static PetscErrorCode PetscDrawTriangle_TikZ(PetscDraw draw, PetscReal x1, PetscReal y1, PetscReal x2, PetscReal y2, PetscReal x3, PetscReal y3, int c1, int c2, int c3)
107: {
108:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;

110:   PetscFunctionBegin;
111:   win->written = PETSC_TRUE;
112:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, "\\fill [color=%s] (%g,%g) -- (%g,%g) -- (%g,%g) -- cycle;\n", TikZColorMap(c1), XTRANS(draw, x1), YTRANS(draw, y1), XTRANS(draw, x2), YTRANS(draw, y2), XTRANS(draw, x3), YTRANS(draw, y3)));
113:   PetscFunctionReturn(PETSC_SUCCESS);
114: }

116: static PetscErrorCode PetscDrawEllipse_TikZ(PetscDraw draw, PetscReal x, PetscReal y, PetscReal a, PetscReal b, int c)
117: {
118:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;
119:   PetscReal       rx, ry;

121:   PetscFunctionBegin;
122:   win->written = PETSC_TRUE;
123:   rx           = a / 2 * (draw->port_xr - draw->port_xl) / (draw->coor_xr - draw->coor_xl);
124:   ry           = b / 2 * (draw->port_yr - draw->port_yl) / (draw->coor_yr - draw->coor_yl);
125:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, "\\fill [color=%s] (%g,%g) circle [x radius=%g,y radius=%g];\n", TikZColorMap(c), XTRANS(draw, x), YTRANS(draw, y), (double)rx, (double)ry));
126:   PetscFunctionReturn(PETSC_SUCCESS);
127: }

129: static PetscErrorCode PetscDrawString_TikZ(PetscDraw draw, PetscReal xl, PetscReal yl, int cl, const char text[])
130: {
131:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;

133:   PetscFunctionBegin;
134:   win->written = PETSC_TRUE;
135:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, "\\node [above right, %s] at (%g,%g) {%s};\n", TikZColorMap(cl), XTRANS(draw, xl), YTRANS(draw, yl), text));
136:   PetscFunctionReturn(PETSC_SUCCESS);
137: }

139: static PetscErrorCode PetscDrawStringVertical_TikZ(PetscDraw draw, PetscReal xl, PetscReal yl, int cl, const char text[])
140: {
141:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;
142:   size_t          len;
143:   PetscReal       width;

145:   PetscFunctionBegin;
146:   win->written = PETSC_TRUE;
147:   PetscCall(PetscStrlen(text, &len));
148:   PetscCall(PetscDrawStringGetSize(draw, &width, NULL));
149:   yl = yl - len * width * (draw->coor_yr - draw->coor_yl) / (draw->coor_xr - draw->coor_xl);
150:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, "\\node [rotate=90, %s] at (%g,%g) {%s};\n", TikZColorMap(cl), XTRANS(draw, xl), YTRANS(draw, yl), text));
151:   PetscFunctionReturn(PETSC_SUCCESS);
152: }

154: /*
155:     Does not handle multiline strings correctly
156: */
157: static PetscErrorCode PetscDrawStringBoxed_TikZ(PetscDraw draw, PetscReal xl, PetscReal yl, int cl, int ct, const char text[], PetscReal *w, PetscReal *h)
158: {
159:   PetscDraw_TikZ *win = (PetscDraw_TikZ *)draw->data;
160:   size_t          len;

162:   PetscFunctionBegin;
163:   win->written = PETSC_TRUE;
164:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, "\\draw (%g,%g) node [rectangle, draw, align=center, inner sep=1ex] {%s};\n", XTRANS(draw, xl), YTRANS(draw, yl), text));

166:   /* make up totally bogus height and width of box */
167:   PetscCall(PetscStrlen(text, &len));
168:   if (w) *w = .07 * len;
169:   if (h) *h = .07;
170:   PetscFunctionReturn(PETSC_SUCCESS);
171: }

173: static PetscErrorCode PetscDrawStringGetSize_TikZ(PetscDraw draw, PetscReal *x, PetscReal *y)
174: {
175:   PetscFunctionBegin;
176:   if (x) *x = .014 * (draw->coor_xr - draw->coor_xl) / (draw->port_xr - draw->port_xl);
177:   if (y) *y = .05 * (draw->coor_yr - draw->coor_yl) / (draw->port_yr - draw->port_yl);
178:   PetscFunctionReturn(PETSC_SUCCESS);
179: }

181: static struct _PetscDrawOps DvOps = {NULL, NULL, PetscDrawLine_TikZ, NULL, NULL, NULL, NULL, PetscDrawString_TikZ, PetscDrawStringVertical_TikZ, NULL, PetscDrawStringGetSize_TikZ, NULL, PetscDrawClear_TikZ, PetscDrawRectangle_TikZ, PetscDrawTriangle_TikZ, PetscDrawEllipse_TikZ, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, PetscDrawDestroy_TikZ, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, PetscDrawStringBoxed_TikZ, NULL};

183: PETSC_EXTERN PetscErrorCode PetscDrawCreate_TikZ(PetscDraw draw)
184: {
185:   PetscDraw_TikZ *win;

187:   PetscFunctionBegin;
188:   draw->ops[0] = DvOps;
189:   PetscCall(PetscNew(&win));

191:   draw->data = (void *)win;

193:   if (draw->title) {
194:     PetscCall(PetscStrallocpy(draw->title, &win->filename));
195:   } else {
196:     const char *fname;
197:     PetscCall(PetscObjectGetName((PetscObject)draw, &fname));
198:     PetscCall(PetscStrallocpy(fname, &win->filename));
199:   }
200:   PetscCall(PetscFOpen(PetscObjectComm((PetscObject)draw), win->filename, "w", &win->fd));
201:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, TikZ_BEGIN_DOCUMENT));
202:   PetscCall(PetscFPrintf(PetscObjectComm((PetscObject)draw), win->fd, TikZ_BEGIN_FRAME));

204:   win->written = PETSC_FALSE;
205:   PetscFunctionReturn(PETSC_SUCCESS);
206: }