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maplabel.c
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maplabel.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Labeling Implementation.
* Author: Steve Lime and the MapServer team.
*
******************************************************************************
* 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.
****************************************************************************/
/*
** maplabel.c: Routines to enable text drawing, BITMAP or TRUETYPE.
*/
#include "mapserver.h"
/**
* replace wrap characters with \n , respecting maximal line length.
*
* returns a pointer to the newly allocated text. memory is controlled
* inside this function, so the caller MUST use the pointer returned by
* the function:
* text = msWrapText(label,text);
*
* TODO/FIXME: function will produce erroneous/crashing? results
* if the wrap character is encoded with multiple bytes
*
* see http://mapserver.org/development/rfc/ms-rfc-40.html
* for a summary of how wrap/maxlength interact on the result
* of the text transformation
*/
char *msWrapText(labelObj *label, char *text) {
char wrap;
int maxlength;
if(!text) /*not an error if no text*/
return text;
wrap = label->wrap;
maxlength = label->maxlength;
if(maxlength == 0) {
if(wrap!='\0') {
/* if maxlength = 0 *and* a wrap character was specified,
* replace all wrap characters by \n
* this is the traditional meaning of the wrap character
*/
msReplaceChar(text, wrap, '\n');
}
/* if neither maxlength, nor wrap were specified,
* don't transform this text */
return text;
} else if(maxlength>0) {
if(wrap!='\0') {
/* split input text at the wrap character, only if
* the current line length is over maxlength */
/* TODO: check if the wrap character is a valid byte
* inside a multibyte utf8 glyph. if so, the msCountChars
* will return an erroneous value */
int numwrapchars = msCountChars(text,wrap);
if(numwrapchars > 0) {
if(label->encoding) {
/* we have to use utf decoding functions here, so as not to
* split a text line on a multibyte character */
int num_cur_glyph_on_line = 0; /*count for the number of glyphs
on the current line*/
char *textptr = text;
char glyph[11]; /*storage for unicode fetching function*/
int glyphlen = 0; /*size of current glyph in bytes*/
while((glyphlen = msGetNextGlyph((const char**)&textptr,glyph))>0) {
num_cur_glyph_on_line++;
if(*glyph == wrap && num_cur_glyph_on_line>=(maxlength)) {
/*FIXME (if wrap becomes something other than char):*/
*(textptr-1)='\n'; /*replace wrap char with a \n*/
num_cur_glyph_on_line=0; /*reset count*/
}
}
} else {
int cur_char_on_line = 0;
char *textptr = text;
while(*textptr != 0) {
cur_char_on_line++;
if(*textptr == wrap && cur_char_on_line>=maxlength) {
*textptr='\n'; /*replace wrap char with a \n*/
cur_char_on_line=0; /*reset count*/
}
textptr++;
}
}
return text;
} else {
/*there are no characters available for wrapping*/
return text;
}
} else {
/* if no wrap character was specified, but a maxlength was,
* don't draw this label if it is longer than the specified maxlength*/
if(msGetNumGlyphs(text)>maxlength) {
free(text);
return NULL;
} else {
return text;
}
}
} else { /* negative maxlength: we split lines unconditionally, i.e. without
loooking for a wrap character*/
int numglyphs,numlines;
maxlength = -maxlength; /* use a positive value*/
numglyphs = msGetNumGlyphs(text);
numlines = (numglyphs-1) / maxlength + 1; /*count total number of lines needed
after splitting*/
if(numlines>1) {
char *newtext = msSmallMalloc(strlen(text)+numlines+1);
char *newtextptr = newtext;
char *textptr = text;
int glyphlen = 0, num_cur_glyph = 0;
while((glyphlen = msGetNextGlyph((const char**)&textptr,newtextptr))>0) {
num_cur_glyph++;
newtextptr += glyphlen;
if(num_cur_glyph%maxlength == 0 && num_cur_glyph != numglyphs) {
/*we're at a split location, insert a newline*/
*newtextptr = '\n';
newtextptr++;
}
}
free(text);
return newtext;
} else {
/*no splitting needed, return the original*/
return text;
}
}
}
char *msAlignText(mapObj *map, labelObj *label, char *text) {
double spacewidth=0.0; /*size of a single space, in fractional pixels*/
int numlines;
char **textlines,*newtext,*newtextptr;
int *textlinelengths,*numspacesforpadding;
int numspacestoadd,maxlinelength,i;
rectObj label_rect;
if(!msCountChars(text,'\n'))
return text; /*only one line*/
/*split text into individual lines
* TODO: check if splitting on \n is utf8 safe*/
textlines = msStringSplit(text,'\n',&numlines);
/*
* label->space_size_10 contains a cache for the horizontal size of a single
* 'space' character, at size 10 for the current label
* FIXME: in case of attribute binding for the FONT of the label, this cache will
* be wrong for labels where the attributed font is different than the first
* computed font. This shouldn't happen too often, and hopefully the size of a
* space character shouldn't vary too much between different fonts*/
if(label->space_size_10 == 0.0) {
/*if the cache hasn't been initialized yet, or with pixmap fonts*/
/* compute the size of 16 adjacent spaces. we can't do this for just one space,
* as the labelSize computing functions return integer bounding boxes. we assume
* that the integer rounding for such a number of spaces will be negligeable
* compared to the actual size of thoses spaces */
if(msGetLabelSize(map,label,". .",10.0,&label_rect,NULL) != MS_SUCCESS) {
/*error computing label size, we can't continue*/
/*free the previously allocated split text*/
while(numlines--)
free(textlines[numlines]);
free(textlines);
return text;
}
/* this is the size of a single space character. for truetype fonts,
* it's the size of a 10pt space. For pixmap fonts, it's the size
* for the current label */
spacewidth = (label_rect.maxx-label_rect.minx)/16.0;
if(label->type == MS_TRUETYPE) {
label->space_size_10=spacewidth; /*cache the computed size*/
/*size of a space for current label size*/
spacewidth = spacewidth * (double)label->size/10.0;
}
} else {
spacewidth = label->space_size_10 * (double)label->size/10.0;
}
spacewidth = MS_MAX(1,spacewidth);
/*length in pixels of each line*/
textlinelengths = (int*)msSmallMalloc(numlines*sizeof(int));
/*number of spaces that need to be added to each line*/
numspacesforpadding = (int*)msSmallMalloc(numlines*sizeof(int));
/*total number of spaces that need to be added*/
numspacestoadd=0;
/*length in pixels of the longest line*/
maxlinelength=0;
for(i=0;i<numlines;i++) {
msGetLabelSize(map,label,textlines[i],label->size, &label_rect,NULL);
textlinelengths[i] = label_rect.maxx-label_rect.minx;
if(maxlinelength<textlinelengths[i])
maxlinelength=textlinelengths[i];
}
for(i=0;i<numlines;i++) {
/* number of spaces to add so the current line is
* as long as the longest line */
double nfracspaces = (maxlinelength - textlinelengths[i])/spacewidth;
if(label->align == MS_ALIGN_CENTER) {
numspacesforpadding[i]=MS_NINT(nfracspaces/2.0);
} else {
if(label->align == MS_ALIGN_RIGHT) {
numspacesforpadding[i]=MS_NINT(nfracspaces);
}
}
numspacestoadd+=numspacesforpadding[i];
}
/*allocate new text with room for the additional spaces needed*/
newtext = (char*)msSmallMalloc(strlen(text)+1+numspacestoadd);
newtextptr=newtext;
for(i=0;i<numlines;i++) {
int j;
/*padd beginning of line with needed spaces*/
for(j=0;j<numspacesforpadding[i];j++) {
*(newtextptr++)=' ';
}
/*copy original line*/
strcpy(newtextptr,textlines[i]);
/*place pointer at the char right after the current line*/
newtextptr+=strlen(textlines[i])+1;
if(i!=numlines-1) {
/*put the \n back in (was taken away by msStringSplit)*/
*(newtextptr-1)='\n';
}
}
/*free the original text*/
free(text);
for(i=0;i<numlines;i++) {
free(textlines[i]);
}
free(textlines);
free(textlinelengths);
free(numspacesforpadding);
/*return the aligned text. note that the terminating \0 was added by the last
* call to strcpy */
return newtext;
}
/*
* this function applies the label encoding and wrap parameters
* to the supplied text
* Note: it is the caller's responsibility to free the returned
* char array
*/
char *msTransformLabelText(mapObj *map, labelObj *label, char *text)
{
char *newtext = text;
if(label->encoding)
newtext = msGetEncodedString(text, label->encoding);
else
newtext=msStrdup(text);
if(newtext && (label->wrap!='\0' || label->maxlength!=0)) {
newtext = msWrapText(label, newtext);
}
if(newtext && label->align!=MS_ALIGN_LEFT ) {
newtext = msAlignText(map, label, newtext);
}
return newtext;
}
int msAddLabelGroup(mapObj *map, int layerindex, int classindex, shapeObj *shape, pointObj *point, double featuresize) {
int i, priority, numactivelabels=0;
labelCacheSlotObj *cacheslot;
labelCacheMemberObj *cachePtr=NULL;
layerObj *layerPtr=NULL;
classObj *classPtr=NULL;
layerPtr = (GET_LAYER(map, layerindex)); /* set up a few pointers for clarity */
classPtr = GET_LAYER(map, layerindex)->class[classindex];
if(classPtr->numlabels == 0) return MS_SUCCESS; /* not an error just nothing to do */
for(i=0;i<classPtr->numlabels;i++) {
if(classPtr->labels[i]->status == MS_ON) {
numactivelabels++;
}
}
if(numactivelabels == 0) return MS_SUCCESS;
/* if the number of labels is 1 then call msAddLabel() accordingly */
if(numactivelabels == 1) {
for(i=0;i<classPtr->numlabels;i++) {
if(classPtr->labels[i]->status == MS_ON)
return msAddLabel(map, classPtr->labels[i], layerindex, classindex, shape, point, NULL, featuresize);
}
}
if (layerPtr->type == MS_LAYER_ANNOTATION && (cachePtr->numlabels > 1 || classPtr->leader.maxdistance)) {
msSetError(MS_MISCERR, "Multiple Labels and/or LEADERs are not supported with annotation layers", "msAddLabelGroup()");
return MS_FAILURE;
}
/* check that the label intersects the layer mask */
if(layerPtr->masklayer) {
int maskLayerIdx = msGetLayerIndex(map,layerPtr->masklayer);
layerObj *maskLayer = GET_LAYER(map,maskLayerIdx);
if(maskLayer->maskimage && MS_IMAGE_RENDERER(maskLayer->maskimage)->supports_pixel_buffer) {
rasterBufferObj rb;
int x,y;
memset(&rb,0,sizeof(rasterBufferObj));
MS_IMAGE_RENDERER(maskLayer->maskimage)->getRasterBufferHandle(maskLayer->maskimage,&rb);
x = MS_NINT(point->x);
y = MS_NINT(point->y);
#ifdef USE_GD
if(rb.type == MS_BUFFER_BYTE_RGBA) {
unsigned char *alphapixptr = rb.data.rgba.a+rb.data.rgba.row_step*y + rb.data.rgba.pixel_step*x;
if(!*alphapixptr) {
/* label point does not intersect mask */
return MS_SUCCESS;
}
} else {
if(!gdImageGetPixel(rb.data.gd_img,x,y))
return MS_SUCCESS;
}
#else
assert(rb.type == MS_BUFFER_BYTE_RGBA);
unsigned char *alphapixptr = rb.data.rgba.a+rb.data.rgba.row_step*y + rb.data.rgba.pixel_step*x;
if(!*alphapixptr) {
/* label point does not intersect mask */
return MS_SUCCESS;
}
#endif
} else {
msSetError(MS_MISCERR, "Layer (%s) references references a mask layer, but the selected renderer does not support them", "msAddLabelGroup()", layerPtr->name);
return (MS_FAILURE);
}
}
/* Validate label priority value and get ref on label cache for it */
priority = classPtr->labels[0]->priority; /* take priority from the first label */
if (priority < 1)
priority = 1;
else if (priority > MS_MAX_LABEL_PRIORITY)
priority = MS_MAX_LABEL_PRIORITY;
cacheslot = &(map->labelcache.slots[priority-1]);
if(cacheslot->numlabels == cacheslot->cachesize) { /* just add it to the end */
cacheslot->labels = (labelCacheMemberObj *) realloc(cacheslot->labels, sizeof(labelCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT));
MS_CHECK_ALLOC(cacheslot->labels, sizeof(labelCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT), MS_FAILURE);
cacheslot->cachesize += MS_LABELCACHEINCREMENT;
}
cachePtr = &(cacheslot->labels[cacheslot->numlabels]);
cachePtr->layerindex = layerindex; /* so we can get back to this *raw* data if necessary */
cachePtr->classindex = classindex;
if(shape) {
cachePtr->shapetype = shape->type;
} else {
cachePtr->shapetype = MS_SHAPE_POINT;
}
cachePtr->point = *point; /* the actual label point */
cachePtr->labelpath = NULL;
cachePtr->leaderline = NULL;
cachePtr->leaderbbox = NULL;
// cachePtr->text = msStrdup(string); /* the actual text */
/* TODO: perhaps we can get rid of this next section and just store a marker size? Why do we cache the styles for a point layer? */
/* copy the styles (only if there is an accompanying marker)
* We cannot simply keep refs because the rendering code might alters some members of the style objects
*/
cachePtr->styles = NULL;
cachePtr->numstyles = 0;
if(layerPtr->type == MS_LAYER_ANNOTATION && classPtr->numstyles > 0) {
cachePtr->numstyles = classPtr->numstyles;
cachePtr->styles = (styleObj *) msSmallMalloc(sizeof(styleObj)*classPtr->numstyles);
if (classPtr->numstyles > 0) {
for(i=0; i<classPtr->numstyles; i++) {
initStyle(&(cachePtr->styles[i]));
msCopyStyle(&(cachePtr->styles[i]), classPtr->styles[i]);
}
}
}
/*
** copy the labels (we are guaranteed to have more than one):
** we cannot simply keep refs because the rendering code alters some members of the style objects
*/
cachePtr->numlabels = 0;
cachePtr->labels = (labelObj *) msSmallMalloc(sizeof(labelObj)*numactivelabels);
for(i=0; i<classPtr->numlabels; i++) {
if(classPtr->labels[i]->status == MS_OFF) continue;
initLabel(&(cachePtr->labels[cachePtr->numlabels]));
msCopyLabel(&(cachePtr->labels[cachePtr->numlabels]), classPtr->labels[i]);
cachePtr->numlabels++;
}
assert(cachePtr->numlabels == numactivelabels);
cachePtr->markerid = -1;
cachePtr->featuresize = featuresize;
//cachePtr->poly = (shapeObj *) msSmallMalloc(sizeof(shapeObj));
//msInitShape(cachePtr->poly);
cachePtr->poly = NULL;
cachePtr->status = MS_FALSE;
if(layerPtr->type == MS_LAYER_POINT && classPtr->numstyles > 0) {
/* cache the marker placement, it's already on the map */
/* TO DO: at the moment only checks the bottom style, perhaps should check all of them */
/* #2347: after RFC-24 classPtr->styles could be NULL so we check it */
rectObj rect;
double w, h;
if(msGetMarkerSize(&map->symbolset, classPtr->styles[0], &w, &h, layerPtr->scalefactor) != MS_SUCCESS)
return(MS_FAILURE);
if(cacheslot->nummarkers == cacheslot->markercachesize) { /* just add it to the end */
cacheslot->markers = (markerCacheMemberObj *) realloc(cacheslot->markers, sizeof(markerCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT));
MS_CHECK_ALLOC(cacheslot->markers, sizeof(markerCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT), MS_FAILURE);
cacheslot->markercachesize+=MS_LABELCACHEINCREMENT;
}
i = cacheslot->nummarkers;
cacheslot->markers[i].poly = (shapeObj *) msSmallMalloc(sizeof(shapeObj));
msInitShape(cacheslot->markers[i].poly);
rect.minx = (point->x - .5 * w);
rect.miny = (point->y - .5 * h);
rect.maxx = rect.minx + (w-1);
rect.maxy = rect.miny + (h-1);
msRectToPolygon(rect, cacheslot->markers[i].poly);
cacheslot->markers[i].id = cacheslot->numlabels;
cachePtr->markerid = i;
cacheslot->nummarkers++;
}
cacheslot->numlabels++;
/* Maintain main labelCacheObj.numlabels only for backwards compatibility */
map->labelcache.numlabels++;
return(MS_SUCCESS);
}
int msAddLabel(mapObj *map, labelObj *label, int layerindex, int classindex, shapeObj *shape, pointObj *point, labelPathObj *labelpath, double featuresize) {
int i;
labelCacheSlotObj *cacheslot;
labelCacheMemberObj *cachePtr=NULL;
layerObj *layerPtr=NULL;
classObj *classPtr=NULL;
if(!label) return(MS_FAILURE); // RFC 77 TODO: set a proper message
if(label->status == MS_OFF) return(MS_SUCCESS); /* not an error */
if(!label->annotext) {
/* check if we have a labelpnt style */
for(i=0;i<label->numstyles;i++) {
if(label->styles[i]->_geomtransform.type == MS_GEOMTRANSFORM_LABELPOINT)
break;
}
if(i==label->numstyles) {
/* label has no text or marker symbols */
return MS_SUCCESS;
}
}
layerPtr = (GET_LAYER(map, layerindex)); /* set up a few pointers for clarity */
classPtr = GET_LAYER(map, layerindex)->class[classindex];
if(classPtr->leader.maxdistance) {
if (layerPtr->type == MS_LAYER_ANNOTATION) {
msSetError(MS_MISCERR, "LEADERs are not supported on annotation layers", "msAddLabel()");
return MS_FAILURE;
}
if(labelpath) {
msSetError(MS_MISCERR, "LEADERs are not supported on ANGLE FOLLOW labels", "msAddLabel()");
return MS_FAILURE;
}
}
/* check that the label intersects the layer mask */
if (layerPtr->masklayer) {
int maskLayerIdx = msGetLayerIndex(map, layerPtr->masklayer);
layerObj *maskLayer = GET_LAYER(map, maskLayerIdx);
if (maskLayer->maskimage && MS_IMAGE_RENDERER(maskLayer->maskimage)->supports_pixel_buffer) {
rasterBufferObj rb;
memset(&rb, 0, sizeof (rasterBufferObj));
MS_IMAGE_RENDERER(maskLayer->maskimage)->getRasterBufferHandle(maskLayer->maskimage, &rb);
if (point) {
int x = MS_NINT(point->x);
int y = MS_NINT(point->y);
#ifdef USE_GD
if(rb.type == MS_BUFFER_BYTE_RGBA) {
unsigned char *alphapixptr = rb.data.rgba.a+rb.data.rgba.row_step*y + rb.data.rgba.pixel_step*x;
if(!*alphapixptr) {
/* label point does not intersect mask */
return MS_SUCCESS;
}
} else {
if(!gdImageGetPixel(rb.data.gd_img,x,y))
return MS_SUCCESS;
}
#else
assert(rb.type == MS_BUFFER_BYTE_RGBA);
unsigned char *alphapixptr = rb.data.rgba.a+rb.data.rgba.row_step*y + rb.data.rgba.pixel_step*x;
if(!*alphapixptr) {
/* label point does not intersect mask */
return MS_SUCCESS;
}
#endif
} else if (labelpath) {
int i = 0;
for (i = 0; i < labelpath->path.numpoints; i++) {
int x = MS_NINT(labelpath->path.point[i].x);
int y = MS_NINT(labelpath->path.point[i].y);
#ifdef USE_GD
if (rb.type == MS_BUFFER_BYTE_RGBA) {
unsigned char *alphapixptr = rb.data.rgba.a + rb.data.rgba.row_step * y + rb.data.rgba.pixel_step*x;
if (!*alphapixptr) {
/* label point does not intersect mask */
return MS_SUCCESS;
}
} else {
if (!gdImageGetPixel(rb.data.gd_img, x, y))
return MS_SUCCESS;
}
#else
assert(rb.type == MS_BUFFER_BYTE_RGBA);
unsigned char *alphapixptr = rb.data.rgba.a + rb.data.rgba.row_step * y + rb.data.rgba.pixel_step*x;
if (!*alphapixptr) {
/* label point does not intersect mask */
return MS_SUCCESS;
}
#endif
}
}
} else {
msSetError(MS_MISCERR, "Layer (%s) references references a mask layer, but the selected renderer does not support them", "msAddLabel()", layerPtr->name);
return (MS_FAILURE);
}
}
/* Validate label priority value and get ref on label cache for it */
if (label->priority < 1)
label->priority = 1;
else if (label->priority > MS_MAX_LABEL_PRIORITY)
label->priority = MS_MAX_LABEL_PRIORITY;
cacheslot = &(map->labelcache.slots[label->priority-1]);
if(cacheslot->numlabels == cacheslot->cachesize) { /* just add it to the end */
cacheslot->labels = (labelCacheMemberObj *) realloc(cacheslot->labels, sizeof(labelCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT));
MS_CHECK_ALLOC(cacheslot->labels, sizeof(labelCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT), MS_FAILURE);
cacheslot->cachesize += MS_LABELCACHEINCREMENT;
}
cachePtr = &(cacheslot->labels[cacheslot->numlabels]);
cachePtr->layerindex = layerindex; /* so we can get back to this *raw* data if necessary */
cachePtr->classindex = classindex;
if(shape) {
cachePtr->shapetype = shape->type;
} else {
cachePtr->shapetype = MS_SHAPE_POINT;
}
cachePtr->leaderline = NULL;
cachePtr->leaderbbox = NULL;
/* Store the label point or the label path (Bug #1620) */
if ( point ) {
cachePtr->point = *point; /* the actual label point */
cachePtr->labelpath = NULL;
} else {
assert(labelpath);
cachePtr->labelpath = labelpath;
/* Use the middle point of the labelpath for mindistance calculations */
cachePtr->point = labelpath->path.point[labelpath->path.numpoints / 2];
}
/* TODO: perhaps we can get rid of this next section and just store a marker size? Why do we cache the styles for a point layer? */
/* copy the styles (only if there is an accompanying marker)
* We cannot simply keeep refs because the rendering code alters some members of the style objects
*/
cachePtr->styles = NULL;
cachePtr->numstyles = 0;
if(layerPtr->type == MS_LAYER_ANNOTATION && classPtr->numstyles > 0) {
cachePtr->numstyles = classPtr->numstyles;
cachePtr->styles = (styleObj *) msSmallMalloc(sizeof(styleObj)*classPtr->numstyles);
if (classPtr->numstyles > 0) {
for(i=0; i<classPtr->numstyles; i++) {
initStyle(&(cachePtr->styles[i]));
msCopyStyle(&(cachePtr->styles[i]), classPtr->styles[i]);
}
}
}
/* copy the label */
cachePtr->numlabels = 1;
cachePtr->labels = (labelObj *) msSmallMalloc(sizeof(labelObj));
initLabel(cachePtr->labels);
msCopyLabel(cachePtr->labels, label);
cachePtr->markerid = -1;
cachePtr->featuresize = featuresize;
//cachePtr->poly = (shapeObj *) msSmallMalloc(sizeof(shapeObj));
//msInitShape(cachePtr->poly);
cachePtr->poly = NULL;
cachePtr->status = MS_FALSE;
if(layerPtr->type == MS_LAYER_POINT && classPtr->numstyles > 0) { /* cache the marker placement, it's already on the map */
rectObj rect;
double w, h;
if(cacheslot->nummarkers == cacheslot->markercachesize) { /* just add it to the end */
cacheslot->markers = (markerCacheMemberObj *) realloc(cacheslot->markers, sizeof(markerCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT));
MS_CHECK_ALLOC(cacheslot->markers, sizeof(markerCacheMemberObj)*(cacheslot->cachesize+MS_LABELCACHEINCREMENT), MS_FAILURE);
cacheslot->markercachesize+=MS_LABELCACHEINCREMENT;
}
i = cacheslot->nummarkers;
cacheslot->markers[i].poly = (shapeObj *) msSmallMalloc(sizeof(shapeObj));
msInitShape(cacheslot->markers[i].poly);
/* TO DO: at the moment only checks the bottom style, perhaps should check all of them */
/* #2347: after RFC-24 classPtr->styles could be NULL so we check it */
if(classPtr->styles != NULL) {
if(msGetMarkerSize(&map->symbolset, classPtr->styles[0], &w, &h, layerPtr->scalefactor) != MS_SUCCESS)
return(MS_FAILURE);
rect.minx = point->x - .5 * w;
rect.miny = point->y - .5 * h;
rect.maxx = rect.minx + (w-1);
rect.maxy = rect.miny + (h-1);
msRectToPolygon(rect, cacheslot->markers[i].poly);
cacheslot->markers[i].id = cacheslot->numlabels;
cachePtr->markerid = i;
cacheslot->nummarkers++;
}
}
cacheslot->numlabels++;
/* Maintain main labelCacheObj.numlabels only for backwards compatibility */
map->labelcache.numlabels++;
return(MS_SUCCESS);
}
/*
** Is a label completely in the image, reserving a gutter (in pixels) inside
** image for no labels (effectively making image larger. The gutter can be
** negative in cases where a label has a buffer around it.
*/
static int labelInImage(int width, int height, shapeObj *lpoly, int gutter)
{
int i,j;
/* do a bbox test first */
if(lpoly->bounds.minx >= gutter &&
lpoly->bounds.miny >= gutter &&
lpoly->bounds.maxx < width-gutter &&
lpoly->bounds.maxy < height-gutter) {
return MS_TRUE;
}
for(i=0; i<lpoly->numlines; i++) {
for(j=1; j<lpoly->line[i].numpoints; j++) {
if(lpoly->line[i].point[j].x < gutter) return(MS_FALSE);
if(lpoly->line[i].point[j].x >= width-gutter) return(MS_FALSE);
if(lpoly->line[i].point[j].y < gutter) return(MS_FALSE);
if(lpoly->line[i].point[j].y >= height-gutter) return(MS_FALSE);
}
}
return(MS_TRUE);
}
/* msTestLabelCacheCollisions()
**
** Compares current label against labels already drawn and markers from cache and discards it
** by setting cachePtr->status=MS_FALSE if it is a duplicate, collides with another label,
** or collides with a marker.
**
** This function is used by the various msDrawLabelCacheXX() implementations.
int msTestLabelCacheCollisions(labelCacheObj *labelcache, labelObj *labelPtr,
int mapwidth, int mapheight, int buffer,
labelCacheMemberObj *cachePtr, int current_priority,
int current_label, int mindistance, double label_size);
*/
int msTestLabelCacheCollisions(mapObj *map, labelCacheMemberObj *cachePtr, shapeObj *poly,
int mindistance, int current_priority, int current_label) {
labelCacheObj *labelcache = &(map->labelcache);
int i, p, ll, pp;
double label_width = 0;
labelCacheMemberObj *curCachePtr=NULL;
/*
* Check against image bounds first
*/
if(!cachePtr->labels[0].partials) {
if(labelInImage(map->width, map->height, poly, labelcache->gutter) == MS_FALSE) {
return MS_FALSE;
}
}
/* compute start index of first label to test: only test against rendered labels */
if(current_label>=0) {
i = current_label+1;
} else {
i = 0;
current_label = -current_label;
}
/* Compare against all rendered markers from this priority level and higher.
** Labels can overlap their own marker and markers from lower priority levels
*/
for (p=current_priority; p < MS_MAX_LABEL_PRIORITY; p++) {
labelCacheSlotObj *markerslot;
markerslot = &(labelcache->slots[p]);
for ( ll = 0; ll < markerslot->nummarkers; ll++ ) {
if ( !(p == current_priority && current_label == markerslot->markers[ll].id ) ) { /* labels can overlap their own marker */
if ( intersectLabelPolygons(markerslot->markers[ll].poly, poly ) == MS_TRUE ) {
return MS_FALSE;
}
}
}
}
if(mindistance > 0)
label_width = poly->bounds.maxx - poly->bounds.minx;
for(p=current_priority; p<MS_MAX_LABEL_PRIORITY; p++) {
labelCacheSlotObj *cacheslot;
cacheslot = &(labelcache->slots[p]);
for( ; i < cacheslot->numlabels; i++) {
curCachePtr = &(cacheslot->labels[i]);
if(curCachePtr->status == MS_TRUE) { /* compare bounding polygons and check for duplicates */
/* skip testing against ourself */
assert(p!=current_priority || i != current_label);
/*
** Note 1: We add the label_size to the mindistance value when comparing because we do want the mindistance
** value between the labels and not only from point to point.
**
** Note 2: We only check the first label (could be multiples (RFC 77)) since that is *by far* the most common
** use case. Could change in the future but it's not worth the overhead at this point.
*/
if(mindistance >0 &&
(cachePtr->layerindex == curCachePtr->layerindex) &&
(cachePtr->classindex == curCachePtr->classindex) &&
(cachePtr->labels[0].annotext && curCachePtr->labels[0].annotext &&
strcmp(cachePtr->labels[0].annotext, curCachePtr->labels[0].annotext) == 0) &&
(msDistancePointToPoint(&(cachePtr->point), &(curCachePtr->point)) <= (mindistance + label_width))) { /* label is a duplicate */
return MS_FALSE;
}
if(intersectLabelPolygons(curCachePtr->poly, poly) == MS_TRUE) { /* polys intersect */
return MS_FALSE;
}
if(curCachePtr->leaderline) {
/* our poly against rendered leader lines */
/* first do a bbox check */
if(msRectOverlap(curCachePtr->leaderbbox, &(poly->bounds))) {
/* look for intersecting line segments */
for(ll=0; ll<poly->numlines; ll++)
for(pp=1; pp<poly->line[ll].numpoints; pp++)
if(msIntersectSegments(
&(poly->line[ll].point[pp-1]),
&(poly->line[ll].point[pp]),
&(curCachePtr->leaderline->point[0]),
&(curCachePtr->leaderline->point[1])) == MS_TRUE)
{
return(MS_FALSE);
}
}
}
if(cachePtr->leaderline) {
/* does our leader intersect current label */
/* first do a bbox check */
if(msRectOverlap(cachePtr->leaderbbox, &(curCachePtr->poly->bounds))) {
/* look for intersecting line segments */
for(ll=0; ll<curCachePtr->poly->numlines; ll++)
for(pp=1; pp<curCachePtr->poly->line[ll].numpoints; pp++)
if(msIntersectSegments(
&(curCachePtr->poly->line[ll].point[pp-1]),
&(curCachePtr->poly->line[ll].point[pp]),
&(cachePtr->leaderline->point[0]),
&(cachePtr->leaderline->point[1])) == MS_TRUE)
{
return(MS_FALSE);
}
}
if(curCachePtr->leaderline) {
/* TODO: check intersection of leader lines, not only bbox test ? */
if(msRectOverlap(curCachePtr->leaderbbox, cachePtr->leaderbbox)) {
return MS_FALSE;
}
}
}
}
} /* i */
i = 0; /* Start over with 1st label of next slot */
} /* p */
return MS_TRUE;
}
/* msGetLabelCacheMember()
**
** Returns label cache members by index, making all members of the cache
** appear as if they were stored in a single array indexed from 0 to numlabels.
**
** Returns NULL if requested index is out of range.
*/
labelCacheMemberObj *msGetLabelCacheMember(labelCacheObj *labelcache, int i)
{
if(i >= 0 && i < labelcache->numlabels)
{
int p;
for(p=0; p<MS_MAX_LABEL_PRIORITY; p++)
{
if (i < labelcache->slots[p].numlabels )
return &(labelcache->slots[p].labels[i]); /* Found it */
else
i -= labelcache->slots[p].numlabels; /* Check next slots */
}
}
/* Out of range / not found */
return NULL;
}
int msInitFontSet(fontSetObj *fontset)
{
fontset->filename = NULL;
/* fontset->fonts = NULL; */
initHashTable(&(fontset->fonts));
fontset->numfonts = 0;
fontset->map = NULL;
return( 0 );
}
int msFreeFontSet(fontSetObj *fontset)
{
if (fontset->filename)
free(fontset->filename);
fontset->filename = NULL;
if (&(fontset->fonts))
msFreeHashItems(&(fontset->fonts));
/* fontset->fonts = NULL; */
fontset->numfonts = 0;
return( 0 );
}
int msLoadFontSet(fontSetObj *fontset, mapObj *map)
{
FILE *stream;
char buffer[MS_BUFFER_LENGTH];
char alias[64], file1[MS_PATH_LENGTH], file2[MS_PATH_LENGTH];
char *path;
char szPath[MS_MAXPATHLEN];
int i;
int bFullPath = 0;
if(fontset->numfonts != 0) /* already initialized */
return(0);
if(!fontset->filename)
return(0);
fontset->map = (mapObj *)map;
path = msGetPath(fontset->filename);
/* fontset->fonts = msCreateHashTable(); // create font hash */
/* if(!fontset->fonts) { */
/* msSetError(MS_HASHERR, "Error initializing font hash.", "msLoadFontSet()"); */
/* return(-1); */
/* } */
stream = fopen( msBuildPath(szPath, fontset->map->mappath, fontset->filename), "r");
if(!stream) {
msSetError(MS_IOERR, "Error opening fontset %s.", "msLoadFontset()",
fontset->filename);
return(-1);
}
i = 0;
while(fgets(buffer, MS_BUFFER_LENGTH, stream)) { /* while there's something to load */
if(buffer[0] == '#' || buffer[0] == '\n' || buffer[0] == '\r' || buffer[0] == ' ')
continue; /* skip comments and blank lines */
sscanf(buffer,"%s %s", alias, file1);
if (!(*file1) || !(*alias) || (strlen(file1) <= 0))
continue;
bFullPath = 0;
#if defined(_WIN32) && !defined(__CYGWIN__)
if (file1[0] == '\\' || (strlen(file1) > 1 && (file1[1] == ':')))
bFullPath = 1;
#else
if(file1[0] == '/')
bFullPath = 1;
#endif
if(bFullPath) { /* already full path */
msInsertHashTable(&(fontset->fonts), alias, file1);
} else {
snprintf(file2, sizeof(file2), "%s%s", path, file1);
/* msInsertHashTable(fontset->fonts, alias, file2); */
/*
** msBuildPath is use here, but if we have to save the fontset file
** the msBuildPath must be done everywhere the fonts are used and
** removed here.
*/
msInsertHashTable(&(fontset->fonts), alias,
msBuildPath(szPath, fontset->map->mappath, file2));
}
i++;
}
fontset->numfonts = i;
fclose(stream); /* close the file */
free(path);
return(0);
}
int msGetTruetypeTextBBox(rendererVTableObj *renderer, char* fontstring, fontSetObj *fontset,
double size, char *string, rectObj *rect, double **advances, int bAdjustbaseline) {
outputFormatObj *format = NULL;
int ret = MS_FAILURE;