MapServer/src/mapgeomtransform.c at main · MapServer/MapServer · GitHub

History

323 lines (293 loc) · 11.2 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

/******************************************************************************

* $Id$

* Project: MapServer

* Purpose: RFC48 implementation of geometry transformations for styling

* Author: Thomas Bonfort , Camptocamp (thomas.bonfort at camptocamp.com)

******************************************************************************

* Permission is hereby granted, free of charge, to any person obtaining a

* copy of this software and associated documentation files (the "Software"),

* to deal in the Software without restriction, including without limitation

* the rights to use, copy, modify, merge, publish, distribute, sublicense,

* and/or sell copies of the Software, and to permit persons to whom the

* Software is furnished to do so, subject to the following conditions:

* The above copyright notice and this permission notice shall be included in

* all copies of this Software or works derived from this Software.

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

* DEALINGS IN THE SOFTWARE.

*****************************************************************************/

#include "mapserver.h"

#include "mapthread.h"

extern int yyparse(parseObj *p);

void msStyleSetGeomTransform(styleObj *s, const char *transform) {

if (!transform) {

msFree(s->_geomtransform.string);

s->_geomtransform.string = NULL;

s->_geomtransform.type = MS_GEOMTRANSFORM_NONE;

return;

}

if (!strncasecmp("start", transform, 5)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_START;

} else if (!strncasecmp("end", transform, 3)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_END;

} else if (!strncasecmp("vertices", transform, 8)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_VERTICES;

} else if (!strncasecmp("bbox", transform, 4)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_BBOX;

} else if (!strncasecmp("labelpnt", transform, 8)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_LABELPOINT;

} else if (!strncasecmp("labelpoly", transform, 9)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_LABELPOLY;

} else if (!strncasecmp("labelcenter", transform, 11)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_LABELCENTER;

} else if (!strncasecmp("centroid", transform, 8)) {

s->_geomtransform.type = MS_GEOMTRANSFORM_CENTROID;

} else {

s->_geomtransform.type = MS_GEOMTRANSFORM_NONE;

msSetError(MS_MISCERR, "unknown transform expression",

"msStyleSetGeomTransform()");

msFree(s->_geomtransform.string);

s->_geomtransform.string = NULL;

return;

}

msFree(s->_geomtransform.string);

s->_geomtransform.string = msStrdup(transform);

}

* return a copy of the geometry transform expression

* returned char* must be freed by the caller

char *msStyleGetGeomTransform(styleObj *s) {

return msStrdup(s->_geomtransform.string);

}

double calcOrientation(pointObj *p1, pointObj *p2) {

double theta;

theta = atan2(p2->x - p1->x, p2->y - p1->y);

return MS_RAD_TO_DEG * (theta - MS_PI2);

}

double calcMidAngle(pointObj *p1, pointObj *p2, pointObj *p3) {

pointObj p1n;

double dx12, dy12, dx23, dy23, l12, l23;

/* We treat both segments as vector 1-2 and vector 2-3 and

* compute their dx,dy and length

dx12 = p2->x - p1->x;

dy12 = p2->y - p1->y;

l12 = sqrt(dx12 * dx12 + dy12 * dy12);

dx23 = p3->x - p2->x;

dy23 = p3->y - p2->y;

l23 = sqrt(dx23 * dx23 + dy23 * dy23);

/* Normalize length of vector 1-2 to same as length of vector 2-3 */

if (l12 > 0.0) {

p1n.x = p2->x - dx12 * (l23 / l12);

p1n.y = p2->y - dy12 * (l23 / l12);

} else

p1n = *p2; /* segment 1-2 is 0-length, use segment 2-3 for orientation */

/* Return the orientation defined by the sum of the normalized vectors */

return calcOrientation(&p1n, p3);

}

* RFC48 implementation:

* - transform the original shapeobj

* - use the styleObj to render the transformed shapeobj

int msDrawTransformedShape(mapObj *map, imageObj *image, shapeObj *shape,

styleObj *style, double scalefactor) {

int type = style->_geomtransform.type;

int i, j, status = MS_SUCCESS;

switch (type) {

case MS_GEOMTRANSFORM_END: /*render point on last vertex only*/

for (j = 0; j < shape->numlines; j++) {

lineObj *line = &(shape->line[j]);

pointObj *p = &(line->point[line->numpoints - 1]);

if (p->x < 0 || p->x > image->width || p->y < 0 || p->y > image->height)

continue;

if (style->autoangle == MS_TRUE && line->numpoints > 1) {

style->angle = calcOrientation(&(line->point[line->numpoints - 2]), p);

}

status = msDrawMarkerSymbol(map, image, p, style, scalefactor);

}

break;

case MS_GEOMTRANSFORM_START: /*render point on first vertex only*/

for (j = 0; j < shape->numlines; j++) {

lineObj *line = &(shape->line[j]);

pointObj *p = &(line->point[0]);

/*skip if outside image*/

if (p->x < 0 || p->x > image->width || p->y < 0 || p->y > image->height)

continue;

if (style->autoangle == MS_TRUE && line->numpoints > 1) {

style->angle = calcOrientation(p, &(line->point[1]));

}

status = msDrawMarkerSymbol(map, image, p, style, scalefactor);

}

break;

case MS_GEOMTRANSFORM_VERTICES:

for (j = 0; j < shape->numlines; j++) {

lineObj *line = &(shape->line[j]);

for (i = 1; i < line->numpoints - 1; i++) {

pointObj *p = &(line->point[i]);

/*skip points outside image*/

if (p->x < 0 || p->x > image->width || p->y < 0 || p->y > image->height)

continue;

if (style->autoangle == MS_TRUE) {

style->angle = calcMidAngle(&(line->point[i - 1]), &(line->point[i]),

&(line->point[i + 1]));

}

status = msDrawMarkerSymbol(map, image, p, style, scalefactor);

}

break;

case MS_GEOMTRANSFORM_BBOX: {

shapeObj bbox;

lineObj bbox_line;

pointObj bbox_points[5];

int padding = MS_MAX(style->width, style->size) +

3; /* so clipped shape does not extent into image */

/*create a shapeObj representing the bounding box (clipped by the image

* size)*/

bbox.numlines = 1;

bbox.line = &bbox_line;

bbox.line->numpoints = 5;

bbox.line->point = bbox_points;

msComputeBounds(shape);

bbox_points[0].x = bbox_points[4].x = bbox_points[1].x =

(shape->bounds.minx < -padding) ? -padding : shape->bounds.minx;

/* cppcheck-suppress unreadVariable */

bbox_points[2].x = bbox_points[3].x =

(shape->bounds.maxx > image->width + padding) ? image->width + padding

: shape->bounds.maxx;

bbox_points[0].y = bbox_points[4].y = bbox_points[3].y =

(shape->bounds.miny < -padding) ? -padding : shape->bounds.miny;

/* cppcheck-suppress unreadVariable */

bbox_points[1].y = bbox_points[2].y =

(shape->bounds.maxy > image->height + padding) ? image->height + padding

: shape->bounds.maxy;

status = msDrawShadeSymbol(map, image, &bbox, style, scalefactor);

} break;

case MS_GEOMTRANSFORM_CENTROID: {

double unused; /*used by centroid function*/

pointObj centroid;

if (MS_SUCCESS ==

msGetPolygonCentroid(shape, &centroid, &unused, &unused)) {

status = msDrawMarkerSymbol(map, image, &centroid, style, scalefactor);

}

} break;

case MS_GEOMTRANSFORM_EXPRESSION: {

int status;

shapeObj *tmpshp;

parseObj p;

p.shape = shape; /* set a few parser globals (hence the lock) */

p.expr = &(style->_geomtransform);

if (p.expr->tokens == NULL) { /* this could happen if drawing originates

from legend code (#5193) */

status = msTokenizeExpression(p.expr, NULL, NULL);

if (status != MS_SUCCESS) {

msSetError(MS_MISCERR, "Unable to tokenize expression.",

"msDrawTransformedShape()");

return MS_FAILURE;

}

p.expr->curtoken = p.expr->tokens; /* reset */

p.type = MS_PARSE_TYPE_SHAPE;

status = yyparse(&p);

if (status != 0) {

msSetError(MS_PARSEERR, "Failed to process shape expression: %s",

"msDrawTransformedShape", style->_geomtransform.string);

return MS_FAILURE;

}

tmpshp = p.result.shpval;

switch (tmpshp->type) {

case MS_SHAPE_POINT:

case MS_SHAPE_POLYGON:

/* cppcheck-suppress unreadVariable */

status = msDrawShadeSymbol(map, image, tmpshp, style, scalefactor);

break;

case MS_SHAPE_LINE:

/* cppcheck-suppress unreadVariable */

status = msDrawLineSymbol(map, image, tmpshp, style, scalefactor);

break;

}

msFreeShape(tmpshp);

msFree(tmpshp);

} break;

case MS_GEOMTRANSFORM_LABELPOINT:

case MS_GEOMTRANSFORM_LABELPOLY:

break;

default:

msSetError(MS_MISCERR, "unknown geomtransform", "msDrawTransformedShape()");

return MS_FAILURE;

}

return status;

}

* RFC89 implementation:

* - transform directly the shapeobj

int msGeomTransformShape(mapObj *map, layerObj *layer, shapeObj *shape) {

int i;

expressionObj *e = &layer->_geomtransform;

#ifdef USE_V8_MAPSCRIPT

if (!map->v8context) {

msV8CreateContext(map);

if (!map->v8context) {

msSetError(MS_V8ERR, "Unable to create v8 context.",

"msGeomTransformShape()");

return MS_FAILURE;

}

msV8ContextSetLayer(map, layer);

#endif

switch (e->type) {

case MS_GEOMTRANSFORM_EXPRESSION: {

int status;

shapeObj *tmpshp;

parseObj p;

p.shape = shape; /* set a few parser globals (hence the lock) */

p.expr = e;

p.expr->curtoken = p.expr->tokens; /* reset */

p.type = MS_PARSE_TYPE_SHAPE;

p.dblval = map->cellsize * (msInchesPerUnit(map->units, 0) /

msInchesPerUnit(layer->units, 0));

p.dblval2 = 0;

/* data_cellsize is only set with contour layer */

if (layer->connectiontype == MS_CONTOUR) {

const char *value =

msLookupHashTable(&layer->metadata, "__data_cellsize__");

if (value)

p.dblval2 = atof(value);

}

status = yyparse(&p);

if (status != 0) {

msSetError(MS_PARSEERR, "Failed to process shape expression: %s",

"msGeomTransformShape()", e->string);

return MS_FAILURE;

}

tmpshp = p.result.shpval;

for (i = 0; i < shape->numlines; i++)

free(shape->line[i].point);

shape->numlines = 0;

if (shape->line)

free(shape->line);

shape->line = NULL;

shape->type = tmpshp->type; /* might have been a change (e.g. centerline) */

for (i = 0; i < tmpshp->numlines; i++)

msAddLine(shape, &(tmpshp->line[i])); /* copy each line */

msFreeShape(tmpshp);

msFree(tmpshp);

} break;

default:

msSetError(MS_MISCERR, "unknown geomtransform", "msGeomTransformShape()");

return MS_FAILURE;

}

return MS_SUCCESS;

}

MapServer/src/mapgeomtransform.c at main · MapServer/MapServer · GitHub

Uh oh!

Uh oh!

MapServer/src/mapgeomtransform.c at main · MapServer/MapServer · GitHub

Uh oh!

Uh oh!

Expand file tree

Breadcrumbs

mapgeomtransform.c

Latest commit

History

Breadcrumbs

mapgeomtransform.c

File metadata and controls