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maputil.c
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maputil.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Various utility functions ... a real hodgepodge.
* Author: Steve Lime and the MapServer team.
*
* Notes: Some code (notably msAlphaBlend()) are directly derived from GD. See
* the mapserver/GD-COPYING file for the GD license. Use of this code in this
* manner is compatible with the MapServer license.
*
******************************************************************************
* Copyright (c) 1996-2005 Regents of the University of Minnesota.
*
* 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 <time.h>
#include "mapserver.h"
#include "maptime.h"
#include "mapthread.h"
#include "mapcopy.h"
#if defined(_WIN32) && !defined(__CYGWIN__)
# include <windows.h>
# include <tchar.h>
# include <fcntl.h>
# include <io.h>
#include <process.h>
#endif
extern char *msyystring_buffer;
extern int msyylex_destroy(void);
extern int yyparse(parseObj *);
int msScaleInBounds(double scale, double minscale, double maxscale)
{
if(scale > 0) {
if(maxscale != -1 && scale >= maxscale) return MS_FALSE;
if(minscale != -1 && scale < minscale) return MS_FALSE;
}
return MS_TRUE;
}
/*
** Helper functions to convert from strings to other types or objects.
*/
static int bindIntegerAttribute(int *attribute, char *value)
{
if(!value || strlen(value) == 0) return MS_FAILURE;
*attribute = MS_NINT(atof(value)); /*use atof instead of atoi as a fix for bug 2394*/
return MS_SUCCESS;
}
static int bindDoubleAttribute(double *attribute, char *value)
{
if(!value || strlen(value) == 0) return MS_FAILURE;
*attribute = atof(value);
return MS_SUCCESS;
}
static int bindColorAttribute(colorObj *attribute, char *value)
{
int len;
if(!value || ((len = strlen(value)) == 0)) return MS_FAILURE;
if(value[0] == '#' && (len == 7 || len == 9)) { /* got a hex color */
char hex[2];
hex[0] = value[1];
hex[1] = value[2];
attribute->red = msHexToInt(hex);
hex[0] = value[3];
hex[1] = value[4];
attribute->green = msHexToInt(hex);
hex[0] = value[5];
hex[1] = value[6];
attribute->blue = msHexToInt(hex);
if(len == 9) {
hex[0] = value[7];
hex[1] = value[8];
attribute->alpha = msHexToInt(hex);
}
return MS_SUCCESS;
} else { /* try a space delimited string */
char **tokens=NULL;
int numtokens=0;
tokens = msStringSplit(value, ' ', &numtokens);
if(tokens==NULL || numtokens != 3) {
msFreeCharArray(tokens, numtokens);
return MS_FAILURE; /* punt */
}
attribute->red = atoi(tokens[0]);
attribute->green = atoi(tokens[1]);
attribute->blue = atoi(tokens[2]);
msFreeCharArray(tokens, numtokens);
return MS_SUCCESS;
}
return MS_FAILURE; /* shouldn't get here */
}
static void bindStyle(layerObj *layer, shapeObj *shape, styleObj *style, int drawmode)
{
assert(MS_DRAW_FEATURES(drawmode));
if(style->numbindings > 0) {
if(style->bindings[MS_STYLE_BINDING_SYMBOL].index != -1) {
style->symbol = msGetSymbolIndex(&(layer->map->symbolset), shape->values[style->bindings[MS_STYLE_BINDING_SYMBOL].index], MS_TRUE);
if(style->symbol == -1) style->symbol = 0; /* a reasonable default (perhaps should throw an error?) */
}
if(style->bindings[MS_STYLE_BINDING_ANGLE].index != -1) {
style->angle = 360.0;
bindDoubleAttribute(&style->angle, shape->values[style->bindings[MS_STYLE_BINDING_ANGLE].index]);
}
if(style->bindings[MS_STYLE_BINDING_SIZE].index != -1) {
style->size = 1;
bindDoubleAttribute(&style->size, shape->values[style->bindings[MS_STYLE_BINDING_SIZE].index]);
}
if(style->bindings[MS_STYLE_BINDING_WIDTH].index != -1) {
style->width = 1;
bindDoubleAttribute(&style->width, shape->values[style->bindings[MS_STYLE_BINDING_WIDTH].index]);
}
if(style->bindings[MS_STYLE_BINDING_COLOR].index != -1 && !MS_DRAW_QUERY(drawmode)) {
MS_INIT_COLOR(style->color, -1,-1,-1,255);
bindColorAttribute(&style->color, shape->values[style->bindings[MS_STYLE_BINDING_COLOR].index]);
}
if(style->bindings[MS_STYLE_BINDING_OUTLINECOLOR].index != -1 && !MS_DRAW_QUERY(drawmode)) {
MS_INIT_COLOR(style->outlinecolor, -1,-1,-1,255);
bindColorAttribute(&style->outlinecolor, shape->values[style->bindings[MS_STYLE_BINDING_OUTLINECOLOR].index]);
}
if(style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].index != -1) {
style->outlinewidth = 1;
bindDoubleAttribute(&style->outlinewidth, shape->values[style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].index]);
}
if(style->bindings[MS_STYLE_BINDING_OPACITY].index != -1) {
style->opacity = 100;
bindIntegerAttribute(&style->opacity, shape->values[style->bindings[MS_STYLE_BINDING_OPACITY].index]);
}
if(style->bindings[MS_STYLE_BINDING_OFFSET_X].index != -1) {
style->offsetx = 0;
bindDoubleAttribute(&style->offsetx, shape->values[style->bindings[MS_STYLE_BINDING_OFFSET_X].index]);
}
if(style->bindings[MS_STYLE_BINDING_OFFSET_Y].index != -1) {
style->offsety = 0;
bindDoubleAttribute(&style->offsety, shape->values[style->bindings[MS_STYLE_BINDING_OFFSET_Y].index]);
}
if(style->bindings[MS_STYLE_BINDING_POLAROFFSET_PIXEL].index != -1) {
style->polaroffsetpixel = 0;
bindDoubleAttribute(&style->polaroffsetpixel, shape->values[style->bindings[MS_STYLE_BINDING_POLAROFFSET_PIXEL].index]);
}
if(style->bindings[MS_STYLE_BINDING_POLAROFFSET_ANGLE].index != -1) {
style->polaroffsetangle = 0;
bindDoubleAttribute(&style->polaroffsetangle, shape->values[style->bindings[MS_STYLE_BINDING_POLAROFFSET_ANGLE].index]);
}
if(style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].index != -1) {
style->outlinewidth = 1;
bindDoubleAttribute(&style->outlinewidth, shape->values[style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].index]);
}
if(style->opacity < 100 || style->color.alpha != 255 ) {
int alpha;
alpha = MS_NINT(style->opacity*2.55);
style->color.alpha = alpha;
style->outlinecolor.alpha = alpha;
style->backgroundcolor.alpha = alpha;
style->mincolor.alpha = alpha;
style->maxcolor.alpha = alpha;
}
}
}
static void bindLabel(layerObj *layer, shapeObj *shape, labelObj *label, int drawmode)
{
int i;
assert(MS_DRAW_LABELS(drawmode));
/* check the label styleObj's (TODO: do we need to use querymapMode here? */
for(i=0; i<label->numstyles; i++) {
/* force MS_DRAWMODE_FEATURES for label styles */
bindStyle(layer, shape, label->styles[i], drawmode|MS_DRAWMODE_FEATURES);
}
if(label->numbindings > 0) {
if(label->bindings[MS_LABEL_BINDING_ANGLE].index != -1) {
label->angle = 0.0;
bindDoubleAttribute(&label->angle, shape->values[label->bindings[MS_LABEL_BINDING_ANGLE].index]);
}
if(label->bindings[MS_LABEL_BINDING_SIZE].index != -1) {
label->size = 1;
bindDoubleAttribute(&label->size, shape->values[label->bindings[MS_LABEL_BINDING_SIZE].index]);
}
if(label->bindings[MS_LABEL_BINDING_COLOR].index != -1) {
MS_INIT_COLOR(label->color, -1,-1,-1,255);
bindColorAttribute(&label->color, shape->values[label->bindings[MS_LABEL_BINDING_COLOR].index]);
}
if(label->bindings[MS_LABEL_BINDING_OUTLINECOLOR].index != -1) {
MS_INIT_COLOR(label->outlinecolor, -1,-1,-1,255);
bindColorAttribute(&label->outlinecolor, shape->values[label->bindings[MS_LABEL_BINDING_OUTLINECOLOR].index]);
}
if(label->bindings[MS_LABEL_BINDING_FONT].index != -1) {
msFree(label->font);
label->font = msStrdup(shape->values[label->bindings[MS_LABEL_BINDING_FONT].index]);
}
if(label->bindings[MS_LABEL_BINDING_PRIORITY].index != -1) {
label->priority = MS_DEFAULT_LABEL_PRIORITY;
bindIntegerAttribute(&label->priority, shape->values[label->bindings[MS_LABEL_BINDING_PRIORITY].index]);
}
if(label->bindings[MS_LABEL_BINDING_SHADOWSIZEX].index != -1) {
label->shadowsizex = 1;
bindIntegerAttribute(&label->shadowsizex, shape->values[label->bindings[MS_LABEL_BINDING_SHADOWSIZEX].index]);
}
if(label->bindings[MS_LABEL_BINDING_SHADOWSIZEY].index != -1) {
label->shadowsizey = 1;
bindIntegerAttribute(&label->shadowsizey, shape->values[label->bindings[MS_LABEL_BINDING_SHADOWSIZEY].index]);
}
if(label->bindings[MS_LABEL_BINDING_POSITION].index != -1) {
int tmpPosition;
bindIntegerAttribute(&tmpPosition, shape->values[label->bindings[MS_LABEL_BINDING_POSITION].index]);
if(tmpPosition != 0) { /* is this test sufficient? */
label->position = tmpPosition;
} else { /* Integer binding failed, look for strings like cc, ul, lr, etc... */
if(strlen(shape->values[label->bindings[MS_LABEL_BINDING_POSITION].index]) == 2) {
char *vp = shape->values[label->bindings[MS_LABEL_BINDING_POSITION].index];
if(!strncasecmp(vp,"ul",2))
label->position = MS_UL;
else if(!strncasecmp(vp,"lr",2))
label->position = MS_LR;
else if(!strncasecmp(vp,"ur",2))
label->position = MS_UR;
else if(!strncasecmp(vp,"ll",2))
label->position = MS_LL;
else if(!strncasecmp(vp,"cr",2))
label->position = MS_CR;
else if(!strncasecmp(vp,"cl",2))
label->position = MS_CL;
else if(!strncasecmp(vp,"uc",2))
label->position = MS_UC;
else if(!strncasecmp(vp,"lc",2))
label->position = MS_LC;
else if(!strncasecmp(vp,"cc",2))
label->position = MS_CC;
}
}
}
}
}
/*
** Function to bind various layer properties to shape attributes.
*/
int msBindLayerToShape(layerObj *layer, shapeObj *shape, int drawmode)
{
int i, j;
if(!layer || !shape) return MS_FAILURE;
for(i=0; i<layer->numclasses; i++) {
/* check the styleObj's */
if(MS_DRAW_FEATURES(drawmode)) {
for(j=0; j<layer->class[i]->numstyles; j++) {
bindStyle(layer, shape, layer->class[i]->styles[j], drawmode);
}
}
/* check the labelObj's */
if(MS_DRAW_LABELS(drawmode)) {
for(j=0; j<layer->class[i]->numlabels; j++) {
bindLabel(layer, shape, layer->class[i]->labels[j], drawmode);
}
}
} /* next classObj */
return MS_SUCCESS;
}
/*
* Used to get red, green, blue integers separately based upon the color index
*/
int getRgbColor(mapObj *map,int i,int *r,int *g,int *b)
{
/* check index range */
int status=1;
*r=*g=*b=-1;
if ((i > 0 ) && (i <= map->palette.numcolors) ) {
*r=map->palette.colors[i-1].red;
*g=map->palette.colors[i-1].green;
*b=map->palette.colors[i-1].blue;
status=0;
}
return status;
}
static int searchContextForTag(mapObj *map, char **ltags, char *tag, char *context, int requires)
{
int i;
if(!context) return MS_FAILURE;
/* printf("\tin searchContextForTag, searching %s for %s\n", context, tag); */
if(strstr(context, tag) != NULL) return MS_SUCCESS; /* found the tag */
/* check referenced layers for the tag too */
for(i=0; i<map->numlayers; i++) {
if(strstr(context, ltags[i]) != NULL) { /* need to check this layer */
if(requires == MS_TRUE) {
if(searchContextForTag(map, ltags, tag, GET_LAYER(map, i)->requires, MS_TRUE) == MS_SUCCESS) return MS_SUCCESS;
} else {
if(searchContextForTag(map, ltags, tag, GET_LAYER(map, i)->labelrequires, MS_FALSE) == MS_SUCCESS) return MS_SUCCESS;
}
}
}
return MS_FAILURE;
}
/*
** Function to take a look at all layers with REQUIRES/LABELREQUIRES set to make sure there are no
** recursive context requirements set (e.g. layer1 requires layer2 and layer2 requires layer1). This
** is bug 1059.
*/
int msValidateContexts(mapObj *map)
{
int i;
char **ltags;
int status = MS_SUCCESS;
ltags = (char **) msSmallMalloc(map->numlayers*sizeof(char *));
for(i=0; i<map->numlayers; i++) {
if(GET_LAYER(map, i)->name == NULL) {
ltags[i] = msStrdup("[NULL]");
} else {
ltags[i] = (char *) msSmallMalloc(sizeof(char)*strlen(GET_LAYER(map, i)->name) + 3);
sprintf(ltags[i], "[%s]", GET_LAYER(map, i)->name);
}
}
/* check each layer's REQUIRES and LABELREQUIRES parameters */
for(i=0; i<map->numlayers; i++) {
/* printf("working on layer %s, looking for references to %s\n", GET_LAYER(map, i)->name, ltags[i]); */
if(searchContextForTag(map, ltags, ltags[i], GET_LAYER(map, i)->requires, MS_TRUE) == MS_SUCCESS) {
msSetError(MS_PARSEERR, "Recursion error found for REQUIRES parameter for layer %s.", "msValidateContexts", GET_LAYER(map, i)->name);
status = MS_FAILURE;
break;
}
if(searchContextForTag(map, ltags, ltags[i], GET_LAYER(map, i)->labelrequires, MS_FALSE) == MS_SUCCESS) {
msSetError(MS_PARSEERR, "Recursion error found for LABELREQUIRES parameter for layer %s.", "msValidateContexts", GET_LAYER(map, i)->name);
status = MS_FAILURE;
break;
}
/* printf("done layer %s\n", GET_LAYER(map, i)->name); */
}
/* clean up */
msFreeCharArray(ltags, map->numlayers);
return status;
}
int msEvalContext(mapObj *map, layerObj *layer, char *context)
{
int i, status;
char *tag=NULL;
expressionObj e;
parseObj p;
if(!context) return(MS_TRUE);
/* initialize a temporary expression (e) */
initExpression(&e);
e.string = msStrdup(context);
e.type = MS_EXPRESSION; /* todo */
for(i=0; i<map->numlayers; i++) { /* step through all the layers */
if(layer->index == i) continue; /* skip the layer in question */
if (GET_LAYER(map, i)->name == NULL) continue; /* Layer without name cannot be used in contexts */
tag = (char *)msSmallMalloc(sizeof(char)*strlen(GET_LAYER(map, i)->name) + 3);
sprintf(tag, "[%s]", GET_LAYER(map, i)->name);
if(strstr(e.string, tag)) {
if(msLayerIsVisible(map, (GET_LAYER(map, i))))
e.string = msReplaceSubstring(e.string, tag, "1");
else
e.string = msReplaceSubstring(e.string, tag, "0");
}
free(tag);
}
msTokenizeExpression(&e, NULL, NULL);
p.shape = NULL;
p.expr = &e;
p.expr->curtoken = p.expr->tokens; /* reset */
p.type = MS_PARSE_TYPE_BOOLEAN;
status = yyparse(&p);
freeExpression(&e);
if (status != 0) {
msSetError(MS_PARSEERR, "Failed to parse context", "msEvalContext");
return MS_FALSE; /* error in parse */
}
return p.result.intval;
}
/* msEvalExpression()
*
* Evaluates a mapserver expression for a given set of attribute values and
* returns the result of the expression (MS_TRUE or MS_FALSE)
* May also return MS_FALSE in case of parsing errors or invalid expressions
* (check the error stack if you care)
*
*/
int msEvalExpression(layerObj *layer, shapeObj *shape, expressionObj *expression, int itemindex)
{
if(!expression->string) return MS_TRUE; /* empty expressions are ALWAYS true */
switch(expression->type) {
case(MS_STRING):
if(itemindex == -1) {
msSetError(MS_MISCERR, "Cannot evaluate expression, no item index defined.", "msEvalExpression()");
return MS_FALSE;
}
if(itemindex >= layer->numitems || itemindex >= shape->numvalues) {
msSetError(MS_MISCERR, "Invalid item index.", "msEvalExpression()");
return MS_FALSE;
}
if(expression->flags & MS_EXP_INSENSITIVE) {
if(strcasecmp(expression->string, shape->values[itemindex]) == 0) return MS_TRUE; /* got a match */
} else {
if(strcmp(expression->string, shape->values[itemindex]) == 0) return MS_TRUE; /* got a match */
}
break;
case(MS_EXPRESSION): {
int status;
parseObj p;
p.shape = shape;
p.expr = expression;
p.expr->curtoken = p.expr->tokens; /* reset */
p.type = MS_PARSE_TYPE_BOOLEAN;
status = yyparse(&p);
if (status != 0) {
msSetError(MS_PARSEERR, "Failed to parse expression: %s", "msEvalExpression", expression->string);
return MS_FALSE;
}
return p.result.intval;
break;
}
case(MS_REGEX):
if(itemindex == -1) {
msSetError(MS_MISCERR, "Cannot evaluate expression, no item index defined.", "msEvalExpression()");
return MS_FALSE;
}
if(itemindex >= layer->numitems || itemindex >= shape->numvalues) {
msSetError(MS_MISCERR, "Invalid item index.", "msEvalExpression()");
return MS_FALSE;
}
if(!expression->compiled) {
if(expression->flags & MS_EXP_INSENSITIVE) {
if(ms_regcomp(&(expression->regex), expression->string, MS_REG_EXTENDED|MS_REG_NOSUB|MS_REG_ICASE) != 0) { /* compile the expression */
msSetError(MS_REGEXERR, "Invalid regular expression.", "msEvalExpression()");
return MS_FALSE;
}
} else {
if(ms_regcomp(&(expression->regex), expression->string, MS_REG_EXTENDED|MS_REG_NOSUB) != 0) { /* compile the expression */
msSetError(MS_REGEXERR, "Invalid regular expression.", "msEvalExpression()");
return MS_FALSE;
}
}
expression->compiled = MS_TRUE;
}
if(ms_regexec(&(expression->regex), shape->values[itemindex], 0, NULL, 0) == 0) return MS_TRUE; /* got a match */
break;
}
return MS_FALSE;
}
int *msAllocateValidClassGroups(layerObj *lp, int *nclasses)
{
int *classgroup = NULL;
int nvalidclass = 0, i=0;
if (!lp || !lp->classgroup || lp->numclasses <=0 || !nclasses)
return NULL;
classgroup = (int *)msSmallMalloc(sizeof(int)*lp->numclasses);
nvalidclass = 0;
for (i=0; i<lp->numclasses; i++) {
if (lp->class[i]->group && strcasecmp(lp->class[i]->group, lp->classgroup) == 0) {
classgroup[nvalidclass] = i;
nvalidclass++;
}
}
if (nvalidclass > 0) {
classgroup = (int *)msSmallRealloc(classgroup, sizeof(int)*nvalidclass);
*nclasses = nvalidclass;
return classgroup;
}
if (classgroup)
msFree(classgroup);
return NULL;
}
int msShapeGetClass(layerObj *layer, mapObj *map, shapeObj *shape, int *classgroup, int numclasses)
{
int i, iclass;
if (layer->numclasses > 0) {
if (classgroup == NULL || numclasses <=0)
numclasses = layer->numclasses;
for(i=0; i<numclasses; i++) {
if (classgroup)
iclass = classgroup[i];
else
iclass = i;
if (iclass < 0 || iclass >= layer->numclasses)
continue; /* this should never happen but just in case */
if(map->scaledenom > 0) { /* verify scaledenom here */
if((layer->class[iclass]->maxscaledenom > 0) && (map->scaledenom > layer->class[iclass]->maxscaledenom))
continue; /* can skip this one, next class */
if((layer->class[iclass]->minscaledenom > 0) && (map->scaledenom <= layer->class[iclass]->minscaledenom))
continue; /* can skip this one, next class */
}
/* verify the minfeaturesize */
if ((shape->type == MS_SHAPE_LINE || shape->type == MS_SHAPE_POLYGON) && (layer->class[iclass]->minfeaturesize > 0)) {
double minfeaturesize = Pix2LayerGeoref(map, layer,
layer->class[iclass]->minfeaturesize);
if (msShapeCheckSize(shape, minfeaturesize) == MS_FALSE)
continue; /* skip this one, next class */
}
if(layer->class[iclass]->status != MS_DELETE && msEvalExpression(layer, shape, &(layer->class[iclass]->expression), layer->classitemindex) == MS_TRUE)
return(iclass);
}
}
return(-1); /* no match */
}
static char *evalTextExpression(expressionObj *expr, shapeObj *shape)
{
char *result=NULL;
if(!expr->string) return result; /* nothing to do */
switch(expr->type) {
case(MS_STRING): {
char *target=NULL;
tokenListNodeObjPtr node=NULL;
tokenListNodeObjPtr nextNode=NULL;
result = msStrdup(expr->string);
node = expr->tokens;
if(node) {
while(node != NULL) {
nextNode = node->next;
if(node->token == MS_TOKEN_BINDING_DOUBLE || node->token == MS_TOKEN_BINDING_INTEGER || node->token == MS_TOKEN_BINDING_STRING || node->token == MS_TOKEN_BINDING_TIME) {
target = (char *) msSmallMalloc(strlen(node->tokenval.bindval.item) + 3);
sprintf(target, "[%s]", node->tokenval.bindval.item);
result = msReplaceSubstring(result, target, shape->values[node->tokenval.bindval.index]);
msFree(target);
}
node = nextNode;
}
}
if(!strlen(result)) {
msFree(result);
result = NULL;
}
}
break;
case(MS_EXPRESSION): {
int status;
parseObj p;
p.shape = shape;
p.expr = expr;
p.expr->curtoken = p.expr->tokens; /* reset */
p.type = MS_PARSE_TYPE_STRING;
status = yyparse(&p);
if (status != 0) {
msSetError(MS_PARSEERR, "Failed to process text expression: %s", "evalTextExpression", expr->string);
return NULL;
}
result = p.result.strval;
break;
}
default:
break;
}
if(result && !strlen(result)) {
msFree(result);
result = NULL;
}
return result;
}
int msShapeGetAnnotation(layerObj *layer, shapeObj *shape)
{
int i, j;
/* RFC77 TODO: check and throw some errors here... */
if(!layer || !shape) return MS_FAILURE;
i = shape->classindex;
for(j=0; j<layer->class[i]->numlabels; j++) {
labelObj *lbl = layer->class[i]->labels[j]; /* shortcut */
lbl->status = MS_ON;
if(layer->map->scaledenom > 0) {
if((lbl->maxscaledenom != -1) && (layer->map->scaledenom >= lbl->maxscaledenom)) {
lbl->status = MS_OFF;
continue; /* next label */
}
if((lbl->minscaledenom != -1) && (layer->map->scaledenom < lbl->minscaledenom)) {
lbl->status = MS_OFF;
continue; /* next label */
}
}
if(msEvalExpression(layer, shape, &(lbl->expression), -1) != MS_TRUE) {
lbl->status = MS_OFF;
continue; /* next label */
}
msFree(lbl->annotext);
lbl->annotext = NULL;
if(lbl->text.string) {
lbl->annotext = evalTextExpression(&(lbl->text), shape);
} else if(layer->class[i]->text.string) {
lbl->annotext = evalTextExpression(&(layer->class[i]->text), shape);
} else {
if (shape->values && layer->labelitemindex >= 0 && shape->values[layer->labelitemindex] && strlen(shape->values[layer->labelitemindex]) )
lbl->annotext = msStrdup(shape->values[layer->labelitemindex]);
else if(shape->text)
lbl->annotext = msStrdup(shape->text); /* last resort but common with iniline features */
}
if(lbl->annotext && (lbl->encoding || lbl->wrap || lbl->maxlength)) {
char *newtext = msTransformLabelText(layer->map , lbl, lbl->annotext);
free(lbl->annotext);
lbl->annotext = newtext;
}
}
return MS_SUCCESS;
}
/* Check if the shape is enough big to be drawn with the
layer::minfeaturesize setting. The minfeaturesize parameter should be
the value in geo ref (not in pixel) and should have been multiplied by
the resolution factor.
*/
int msShapeCheckSize(shapeObj *shape, double minfeaturesize)
{
double dx = (shape->bounds.maxx-shape->bounds.minx);
double dy = (shape->bounds.maxy-shape->bounds.miny);
if (pow(minfeaturesize,2.0) > (pow(dx,2.0)+pow(dy,2.0)))
return MS_FALSE;
return MS_TRUE;
}
/*
** Adjusts an image size in one direction to fit an extent.
*/
int msAdjustImage(rectObj rect, int *width, int *height)
{
if(*width == -1 && *height == -1) {
msSetError(MS_MISCERR, "Cannot calculate both image height and width.", "msAdjustImage()");
return(-1);
}
if(*width > 0)
*height = MS_NINT((rect.maxy - rect.miny)/((rect.maxx - rect.minx)/(*width)));
else
*width = MS_NINT((rect.maxx - rect.minx)/((rect.maxy - rect.miny)/(*height)));
return(0);
}
/*
** Make sure extent fits image window to be created. Returns cellsize of output image.
*/
double msAdjustExtent(rectObj *rect, int width, int height)
{
double cellsize, ox, oy;
cellsize = MS_MAX(MS_CELLSIZE(rect->minx, rect->maxx, width), MS_CELLSIZE(rect->miny, rect->maxy, height));
if(cellsize <= 0) /* avoid division by zero errors */
return(0);
ox = MS_MAX(((width-1) - (rect->maxx - rect->minx)/cellsize)/2,0); /* these were width-1 and height-1 */
oy = MS_MAX(((height-1) - (rect->maxy - rect->miny)/cellsize)/2,0);
rect->minx = rect->minx - ox*cellsize;
rect->miny = rect->miny - oy*cellsize;
rect->maxx = rect->maxx + ox*cellsize;
rect->maxy = rect->maxy + oy*cellsize;
return(cellsize);
}
/*
** Rect must always contain a portion of bounds. If not, rect is
** shifted to overlap by overlay percent. The dimensions of rect do
** not change but placement relative to bounds can.
*/
int msConstrainExtent(rectObj *bounds, rectObj *rect, double overlay)
{
double offset=0;
/* check left edge, and if necessary the right edge of bounds */
if(rect->maxx <= bounds->minx) {
offset = overlay*(rect->maxx - rect->minx);
rect->minx += offset; /* shift right */
rect->maxx += offset;
} else if(rect->minx >= bounds->maxx) {
offset = overlay*(rect->maxx - rect->minx);
rect->minx -= offset; /* shift left */
rect->maxx -= offset;
}
/* check top edge, and if necessary the bottom edge of bounds */
if(rect->maxy <= bounds->miny) {
offset = overlay*(rect->maxy - rect->miny);
rect->miny -= offset; /* shift down */
rect->maxy -= offset;
} else if(rect->miny >= bounds->maxy) {
offset = overlay*(rect->maxy - rect->miny);
rect->miny += offset; /* shift up */
rect->maxy += offset;
}
return(MS_SUCCESS);
}
/*
** Generic function to save an image to a file.
**
** Note that map may be NULL. If it is set, then it is used for two things:
** - Deal with relative imagepaths (compute absolute path relative to map path)
** - Extract the georeferenced extents and coordinate system
** of the map for writing out with the image when appropriate
** (primarily this means via msSaveImageGDAL() to something like GeoTIFF).
**
** The filename is NULL when the image is supposed to be written to stdout.
*/
int msSaveImage(mapObj *map, imageObj *img, char *filename)
{
int nReturnVal = MS_FAILURE;
char szPath[MS_MAXPATHLEN];
struct mstimeval starttime, endtime;
if(map && map->debug >= MS_DEBUGLEVEL_TUNING) {
msGettimeofday(&starttime, NULL);
}
if (img) {
#ifdef USE_GDAL
if( MS_DRIVER_GDAL(img->format) ) {
if (map != NULL && filename != NULL )
nReturnVal = msSaveImageGDAL(map, img,
msBuildPath(szPath, map->mappath,
filename));
else
nReturnVal = msSaveImageGDAL(map, img, filename);
} else
#endif
if (MS_RENDERER_PLUGIN(img->format)) {
rendererVTableObj *renderer = img->format->vtable;
FILE *stream = NULL;
if(filename) {
if(map)
stream = fopen(msBuildPath(szPath, map->mappath, filename),"wb");
else
stream = fopen(filename,"wb");
if(!stream) {
msSetError(MS_IOERR,
"Failed to create output file (%s).",
"msSaveImage()", (map?szPath:filename) );
return MS_FAILURE;
}
} else {
if ( msIO_needBinaryStdout() == MS_FAILURE )
return MS_FAILURE;
stream = stdout;
}
if(renderer->supports_pixel_buffer) {
rasterBufferObj data;
if(renderer->getRasterBufferHandle(img,&data) != MS_SUCCESS)
return MS_FAILURE;
nReturnVal = msSaveRasterBuffer(map,&data,stream,img->format );
} else {
nReturnVal = renderer->saveImage(img, map, stream, img->format);
}
if( stream != stdout )
fclose(stream);
} else if( MS_DRIVER_IMAGEMAP(img->format) )
nReturnVal = msSaveImageIM(img, filename, img->format);
else
msSetError(MS_MISCERR, "Unknown image type",
"msSaveImage()");
}
if(map && map->debug >= MS_DEBUGLEVEL_TUNING) {
msGettimeofday(&endtime, NULL);
msDebug("msSaveImage(%s) total time: %.3fs\n",
(filename ? filename : "stdout"),
(endtime.tv_sec+endtime.tv_usec/1.0e6)-
(starttime.tv_sec+starttime.tv_usec/1.0e6) );
}
return nReturnVal;
}
/*
** Generic function to save an image to a byte array.
** - the return value is the pointer to the byte array
** - size_ptr contains the number of bytes returned
** - format: the desired output format
**
** The caller is responsible to free the returned array
** The function returns NULL if the output format is not supported.
*/
unsigned char *msSaveImageBuffer(imageObj* image, int *size_ptr, outputFormatObj *format)
{
*size_ptr = 0;
if( MS_RENDERER_PLUGIN(image->format)) {
rasterBufferObj data;
rendererVTableObj *renderer = image->format->vtable;
if(renderer->supports_pixel_buffer) {
bufferObj buffer;
msBufferInit(&buffer);
renderer->getRasterBufferHandle(image,&data);
msSaveRasterBufferToBuffer(&data,&buffer,format);
*size_ptr = buffer.size;
return buffer.data;
/* don't free the bufferObj as we don't own the bytes anymore */
} else {
/* check if the renderer supports native buffer output */
if (renderer->saveImageBuffer)
return renderer->saveImageBuffer(image, size_ptr, format);
msSetError(MS_MISCERR, "Unsupported image type", "msSaveImageBuffer()");
return NULL;
}
}
msSetError(MS_MISCERR, "Unsupported image type", "msSaveImage()");
return NULL;
}
/**
* Generic function to free the imageObj
*/
void msFreeImage(imageObj *image)
{
if (image) {
if(MS_RENDERER_PLUGIN(image->format)) {
rendererVTableObj *renderer = image->format->vtable;
tileCacheObj *next,*cur = image->tilecache;
while(cur) {
msFreeImage(cur->image);
next = cur->next;
free(cur);
cur = next;
}
image->ntiles = 0;
renderer->freeImage(image);
} else if( MS_RENDERER_IMAGEMAP(image->format) )
msFreeImageIM(image);
else if( MS_RENDERER_RAWDATA(image->format) )
msFree(image->img.raw_16bit);
else
msSetError(MS_MISCERR, "Unknown image type",
"msFreeImage()");
if (image->imagepath)
free(image->imagepath);
if (image->imageurl)
free(image->imageurl);
if( --image->format->refcount < 1 )
msFreeOutputFormat( image->format );
image->imagepath = NULL;
image->imageurl = NULL;
msFree( image->img_mask );
image->img_mask= NULL;
msFree( image );
}
}
/*
** Return an array containing all the layer's index given a group name.
** If nothing is found, NULL is returned. The nCount is initalized
** to the number of elements in the returned array.
** Note : the caller of the function should free the array.
*/
int *msGetLayersIndexByGroup(mapObj *map, char *groupname, int *pnCount)
{
int i;
int iLayer = 0;
int *aiIndex;
if(!groupname || !map || !pnCount) {
return NULL;
}
aiIndex = (int *)msSmallMalloc(sizeof(int) * map->numlayers);
for(i=0; i<map->numlayers; i++) {
if(!GET_LAYER(map, i)->group) /* skip it */
continue;
if(strcmp(groupname, GET_LAYER(map, i)->group) == 0) {
aiIndex[iLayer] = i;
iLayer++;
}
}
if (iLayer == 0) {
free(aiIndex);
aiIndex = NULL;
*pnCount = 0;
} else {
aiIndex = (int *)msSmallRealloc(aiIndex, sizeof(int)* iLayer);
*pnCount = iLayer;
}
return aiIndex;
}
/* ==================================================================== */
/* Measured shape utility functions. */
/* ==================================================================== */