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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 <float.h>
#include "mapserver.h"
#include "fontcache.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(char *text, char wrap, int maxlength)
{
if(!text) /*not an error if no text*/
return text;
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) {
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*/
}
}
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;
}
}
}
void initTextPath(textPathObj *ts) {
memset(ts,0,sizeof(*ts));
}
int WARN_UNUSED msLayoutTextSymbol(mapObj *map, textSymbolObj *ts, textPathObj *tgret);
#if defined(USE_EXTENDED_DEBUG) && 0
static void msDebugTextPath(textSymbolObj *ts) {
int i;
msDebug("text: %s\n",ts->annotext);
if(ts->textpath) {
for(i=0;i<ts->textpath->numglyphs; i++) {
glyphObj *g = &ts->textpath->glyphs[i];
msDebug("glyph %d: pos: %f %f\n",g->glyph->key.codepoint,g->pnt.x,g->pnt.y);
}
} else {
msDebug("no glyphs\n");
}
msDebug("\n=========================================\n");
}
#endif
int msComputeTextPath(mapObj *map, textSymbolObj *ts) {
textPathObj *tgret = msSmallMalloc(sizeof(textPathObj));
assert(ts->annotext && *ts->annotext);
initTextPath(tgret);
ts->textpath = tgret;
tgret->absolute = 0;
tgret->glyph_size = ts->label->size * ts->scalefactor;
tgret->glyph_size = MS_MAX(tgret->glyph_size, ts->label->minsize * ts->resolutionfactor);
tgret->glyph_size = MS_NINT(MS_MIN(tgret->glyph_size, ts->label->maxsize * ts->resolutionfactor));
tgret->line_height = ceil(tgret->glyph_size * 1.33);
return msLayoutTextSymbol(map,ts,tgret);
}
void initTextSymbol(textSymbolObj *ts) {
memset(ts,0,sizeof(*ts));
}
void freeTextPath(textPathObj *tp) {
free(tp->glyphs);
if(tp->bounds.poly) {
free(tp->bounds.poly->point);
free(tp->bounds.poly);
}
}
void freeTextSymbol(textSymbolObj *ts) {
if(ts->textpath) {
freeTextPath(ts->textpath);
free(ts->textpath);
}
if(ts->label->numstyles) {
if(ts->style_bounds) {
int i;
for(i=0;i<ts->label->numstyles; i++) {
if(ts->style_bounds[i]) {
if(ts->style_bounds[i]->poly) {
free(ts->style_bounds[i]->poly->point);
free(ts->style_bounds[i]->poly);
}
free(ts->style_bounds[i]);
}
}
free(ts->style_bounds);
}
}
free(ts->annotext);
if(freeLabel(ts->label) == MS_SUCCESS) {
free(ts->label);
}
}
void msCopyTextPath(textPathObj *dst, textPathObj *src) {
int i;
*dst = *src;
if(src->bounds.poly) {
dst->bounds.poly = msSmallMalloc(sizeof(lineObj));
dst->bounds.poly->numpoints = src->bounds.poly->numpoints;
for(i=0; i<src->bounds.poly->numpoints; i++) {
dst->bounds.poly->point[i] = src->bounds.poly->point[i];
}
} else {
dst->bounds.poly = NULL;
}
if(dst->numglyphs > 0) {
dst->glyphs = msSmallMalloc(dst->numglyphs * sizeof(glyphObj));
for(i=0; i<dst->numglyphs; i++)
dst->glyphs[i] = src->glyphs[i];
}
}
void msCopyTextSymbol(textSymbolObj *dst, textSymbolObj *src) {
*dst = *src;
MS_REFCNT_INCR(src->label);
dst->annotext = msStrdup(src->annotext);
if(dst->textpath) {
dst->textpath = msSmallMalloc(sizeof(textPathObj));
msCopyTextPath(dst->textpath,src->textpath);
}
}
static int labelNeedsDeepCopy(labelObj *label) {
int i;
if(label->numbindings > 0) return MS_TRUE;
for(i=0; i<label->numstyles; i++) {
if(label->styles[i]->numbindings>0) {
return MS_TRUE;
}
}
return MS_FALSE;
}
void msPopulateTextSymbolForLabelAndString(textSymbolObj *ts, labelObj *l, char *string, double scalefactor, double resolutionfactor, label_cache_mode cache) {
if(cache == duplicate_always) {
ts->label = msSmallMalloc(sizeof(labelObj));
initLabel(ts->label);
msCopyLabel(ts->label,l);
} else if(cache == duplicate_never) {
ts->label = l;
MS_REFCNT_INCR(l);
} else if(cache == duplicate_if_needed && labelNeedsDeepCopy(l)) {
ts->label = msSmallMalloc(sizeof(labelObj));
initLabel(ts->label);
msCopyLabel(ts->label,l);
} else {
ts->label = l;
MS_REFCNT_INCR(l);
}
ts->resolutionfactor = resolutionfactor;
ts->scalefactor = scalefactor;
ts->annotext = string; /* we take the ownership of the annotation text */
ts->rotation = l->angle * MS_DEG_TO_RAD;
}
int msAddLabelGroup(mapObj *map, imageObj *image, layerObj* layer, int classindex, shapeObj *shape, pointObj *point, double featuresize)
{
int l,s, priority;
labelCacheSlotObj *cacheslot;
labelCacheMemberObj *cachePtr=NULL;
layerObj *layerPtr=NULL;
classObj *classPtr=NULL;
int numtextsymbols = 0;
textSymbolObj **textsymbols, *ts;
int layerindex = layer->index;
// We cannot use GET_LAYER here because in drawQuery the drawing may happen
// on a temp layer only.
layerPtr = layer;
classPtr = layer->class[classindex];
if(classPtr->numlabels == 0) return MS_SUCCESS; /* not an error just nothing to do */
/* check that the label intersects the layer mask */
if(layerPtr->mask) {
int maskLayerIdx = msGetLayerIndex(map,layerPtr->mask);
layerObj *maskLayer = GET_LAYER(map,maskLayerIdx);
unsigned char *alphapixptr;
if(maskLayer->maskimage && MS_IMAGE_RENDERER(maskLayer->maskimage)->supports_pixel_buffer) {
rasterBufferObj rb;
int x,y;
memset(&rb,0,sizeof(rasterBufferObj));
if(UNLIKELY(MS_FAILURE == MS_IMAGE_RENDERER(maskLayer->maskimage)->getRasterBufferHandle(maskLayer->maskimage,&rb))) {
return MS_FAILURE;
}
x = MS_NINT(point->x);
y = MS_NINT(point->y);
/* Using label repeatdistance, we might have a point with x/y below 0. See #4764 */
if (x >= 0 && x < rb.width && y >= 0 && y < rb.height) {
assert(rb.type == MS_BUFFER_BYTE_RGBA);
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 {
return MS_SUCCESS; /* label point does not intersect image extent, we cannot know if it intersects
mask, so we discard it (#5237)*/
}
} 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);
}
}
textsymbols = msSmallMalloc(classPtr->numlabels * sizeof(textSymbolObj*));
for(l=0; l<classPtr->numlabels; l++) {
labelObj *lbl = classPtr->labels[l];
char *annotext;
if(msGetLabelStatus(map,layerPtr,shape,lbl) == MS_OFF) {
continue;
}
annotext = msShapeGetLabelAnnotation(layerPtr,shape,lbl);
if(!annotext) {
for(s=0;s<lbl->numstyles;s++) {
if(lbl->styles[s]->_geomtransform.type == MS_GEOMTRANSFORM_LABELPOINT)
break; /* we have a "symbol only label, so we shouldn't skip this label */
}
if(s == lbl->numstyles) {
continue; /* no anno text, and no label symbols */
}
}
ts = msSmallMalloc(sizeof(textSymbolObj));
initTextSymbol(ts);
msPopulateTextSymbolForLabelAndString(ts,lbl,annotext,layerPtr->scalefactor,image->resolutionfactor, 1);
if(annotext && *annotext && lbl->autominfeaturesize && featuresize > 0) {
if(UNLIKELY(MS_FAILURE == msComputeTextPath(map,ts)))
return MS_FAILURE;
if(featuresize < (ts->textpath->bounds.bbox.maxx - ts->textpath->bounds.bbox.minx)) {
/* feature is too big to be drawn, skip it */
freeTextSymbol(ts);
free(ts);
continue;
}
}
textsymbols[numtextsymbols] = ts;
numtextsymbols++;
}
if(numtextsymbols == 0) {
free(textsymbols);
return MS_SUCCESS;
}
/* 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;
cachePtr->point = *point; /* the actual label point */
cachePtr->leaderline = NULL;
cachePtr->leaderbbox = NULL;
cachePtr->markerid = -1;
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 */
double w, h;
if(msGetMarkerSize(map, 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;
}
cacheslot->markers[cacheslot->nummarkers].bounds.minx = (point->x - .5 * w);
cacheslot->markers[cacheslot->nummarkers].bounds.miny = (point->y - .5 * h);
cacheslot->markers[cacheslot->nummarkers].bounds.maxx = cacheslot->markers[cacheslot->nummarkers].bounds.minx + (w-1);
cacheslot->markers[cacheslot->nummarkers].bounds.maxy = cacheslot->markers[cacheslot->nummarkers].bounds.miny + (h-1);
cacheslot->markers[cacheslot->nummarkers].id = cacheslot->numlabels;
cachePtr->markerid = cacheslot->nummarkers;
cacheslot->nummarkers++;
}
cachePtr->textsymbols = textsymbols;
cachePtr->numtextsymbols = numtextsymbols;
cacheslot->numlabels++;
return(MS_SUCCESS);
}
int msAddLabel(mapObj *map, imageObj *image, labelObj *label, int layerindex, int classindex,
shapeObj *shape, pointObj *point, double featuresize, textSymbolObj *ts)
{
int i;
labelCacheSlotObj *cacheslot;
labelCacheMemberObj *cachePtr=NULL;
char *annotext = NULL;
layerObj *layerPtr;
classObj *classPtr;
layerPtr=GET_LAYER(map,layerindex);
assert(layerPtr);
assert(classindex < layerPtr->numclasses);
classPtr = layerPtr->class[classindex];
assert(label);
if(ts)
annotext = ts->annotext;
else if(shape)
annotext = msShapeGetLabelAnnotation(layerPtr,shape,label);
if(!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 */
if(ts) {
freeTextSymbol(ts);
free(ts);
}
return MS_SUCCESS;
}
}
if(classPtr->leader) {
if(ts && ts->textpath && ts->textpath->absolute) {
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->mask) {
int maskLayerIdx = msGetLayerIndex(map, layerPtr->mask);
layerObj *maskLayer = GET_LAYER(map, maskLayerIdx);
unsigned char *alphapixptr;
if (maskLayer->maskimage && MS_IMAGE_RENDERER(maskLayer->maskimage)->supports_pixel_buffer) {
rasterBufferObj rb;
memset(&rb, 0, sizeof (rasterBufferObj));
if(UNLIKELY(MS_FAILURE == MS_IMAGE_RENDERER(maskLayer->maskimage)->getRasterBufferHandle(maskLayer->maskimage, &rb))) {
return MS_FAILURE;
}
assert(rb.type == MS_BUFFER_BYTE_RGBA);
if (point) {
int x = MS_NINT(point->x);
int y = MS_NINT(point->y);
/* Using label repeatdistance, we might have a point with x/y below 0. See #4764 */
if (x >= 0 && x < rb.width && y >= 0 && y < rb.height) {
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 */
if(ts) {
freeTextSymbol(ts);
free(ts);
}
return MS_SUCCESS;
}
} else {
return MS_SUCCESS; /* label point does not intersect image extent, we cannot know if it intersects
mask, so we discard it (#5237)*/
}
} else if (ts && ts->textpath) {
int i = 0;
for (i = 0; i < ts->textpath->numglyphs; i++) {
int x = MS_NINT(ts->textpath->glyphs[i].pnt.x);
int y = MS_NINT(ts->textpath->glyphs[i].pnt.y);
if (x >= 0 && x < rb.width && y >= 0 && y < rb.height) {
alphapixptr = rb.data.rgba.a + rb.data.rgba.row_step * y + rb.data.rgba.pixel_step*x;
if (!*alphapixptr) {
freeTextSymbol(ts);
free(ts);
return MS_SUCCESS;
}
} else {
freeTextSymbol(ts);
free(ts);
return MS_SUCCESS; /* label point does not intersect image extent, we cannot know if it intersects
mask, so we discard it (#5237)*/
}
}
}
} 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);
}
}
if(!ts) {
ts = msSmallMalloc(sizeof(textSymbolObj));
initTextSymbol(ts);
msPopulateTextSymbolForLabelAndString(ts,label,annotext,layerPtr->scalefactor,image->resolutionfactor, 1);
}
if(annotext && label->autominfeaturesize && featuresize > 0) {
if(!ts->textpath) {
if(UNLIKELY(MS_FAILURE == msComputeTextPath(map,ts)))
return MS_FAILURE;
}
if(featuresize > (ts->textpath->bounds.bbox.maxx - ts->textpath->bounds.bbox.minx)) {
/* feature is too big to be drawn, skip it */
freeTextSymbol(ts);
free(ts);
return MS_SUCCESS;
}
}
/* 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;
#ifdef include_deprecated
if(shape) {
cachePtr->shapetype = shape->type;
} else {
cachePtr->shapetype = MS_SHAPE_POINT;
}
#endif
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 */
} else {
assert(ts && ts->textpath && ts->textpath->absolute && ts->textpath->numglyphs>0);
/* Use the middle point of the labelpath for mindistance calculations */
cachePtr->point = ts->textpath->glyphs[ts->textpath->numglyphs/2].pnt;
}
/* copy the label */
cachePtr->numtextsymbols = 1;
cachePtr->textsymbols = (textSymbolObj **) msSmallMalloc(sizeof(textSymbolObj*));
cachePtr->textsymbols[0] = ts;
cachePtr->markerid = -1;
cachePtr->status = MS_FALSE;
if(layerPtr->type == MS_LAYER_POINT && classPtr->numstyles > 0) { /* cache the marker placement, it's already on the map */
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;
/* 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, classPtr->styles[0], &w, &h, layerPtr->scalefactor) != MS_SUCCESS)
return(MS_FAILURE);
cacheslot->markers[cacheslot->nummarkers].bounds.minx = (point->x - .5 * w);
cacheslot->markers[cacheslot->nummarkers].bounds.miny = (point->y - .5 * h);
cacheslot->markers[cacheslot->nummarkers].bounds.maxx = cacheslot->markers[cacheslot->nummarkers].bounds.minx + (w-1);
cacheslot->markers[cacheslot->nummarkers].bounds.maxy = cacheslot->markers[cacheslot->nummarkers].bounds.miny + (h-1);
cacheslot->markers[i].id = cacheslot->numlabels;
cachePtr->markerid = i;
cacheslot->nummarkers++;
}
}
cacheslot->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, lineObj *lpoly, rectObj *bounds, int gutter)
{
int j;
/* do a bbox test first */
if(bounds->minx >= gutter &&
bounds->miny >= gutter &&
bounds->maxx < width-gutter &&
bounds->maxy < height-gutter) {
return MS_TRUE;
}
if(lpoly) {
for(j=1; j<lpoly->numpoints; j++) {
if(lpoly->point[j].x < gutter) return(MS_FALSE);
if(lpoly->point[j].x >= width-gutter) return(MS_FALSE);
if(lpoly->point[j].y < gutter) return(MS_FALSE);
if(lpoly->point[j].y >= height-gutter) return(MS_FALSE);
}
} else {
/* if no poly, then return false as the boundong box intersected */
return MS_FALSE;
}
return(MS_TRUE);
}
void insertRenderedLabelMember(mapObj *map, labelCacheMemberObj *cachePtr) {
if(map->labelcache.num_rendered_members == map->labelcache.num_allocated_rendered_members) {
if(map->labelcache.num_rendered_members == 0) {
map->labelcache.num_allocated_rendered_members = 50;
} else {
map->labelcache.num_allocated_rendered_members *= 2;
}
map->labelcache.rendered_text_symbols = msSmallRealloc(map->labelcache.rendered_text_symbols,
map->labelcache.num_allocated_rendered_members * sizeof(labelCacheMemberObj*));
}
map->labelcache.rendered_text_symbols[map->labelcache.num_rendered_members++] = cachePtr;
}
static inline int testSegmentLabelBBoxIntersection(const rectObj *leaderbbox, const pointObj *lp1,
const pointObj *lp2, const label_bounds *test) {
if(msRectOverlap(leaderbbox, &test->bbox)) {
if(test->poly) {
int pp;
for(pp=1; pp<test->poly->numpoints; pp++) {
if(msIntersectSegments(
&(test->poly->point[pp-1]),
&(test->poly->point[pp]),
lp1,lp2) == MS_TRUE) {
return(MS_FALSE);
}
}
} else {
pointObj tp1,tp2;
tp1.x = test->bbox.minx;
tp1.y = test->bbox.miny;
tp2.x = test->bbox.minx;
tp2.y = test->bbox.maxy;
if(msIntersectSegments(lp1,lp2,&tp1,&tp2))
return MS_FALSE;
tp2.x = test->bbox.maxx;
tp2.y = test->bbox.miny;
if(msIntersectSegments(lp1,lp2,&tp1,&tp2))
return MS_FALSE;
tp1.x = test->bbox.maxx;
tp1.y = test->bbox.maxy;
tp2.x = test->bbox.minx;
tp2.y = test->bbox.maxy;
if(msIntersectSegments(lp1,lp2,&tp1,&tp2))
return MS_FALSE;
tp2.x = test->bbox.maxx;
tp2.y = test->bbox.miny;
if(msIntersectSegments(lp1,lp2,&tp1,&tp2))
return MS_FALSE;
}
}
return MS_TRUE;
}
int msTestLabelCacheLeaderCollision(mapObj *map, pointObj *lp1, pointObj *lp2) {
int p;
rectObj leaderbbox;
leaderbbox.minx = MS_MIN(lp1->x,lp2->x);
leaderbbox.maxx = MS_MAX(lp1->x,lp2->x);
leaderbbox.miny = MS_MIN(lp1->y,lp2->y);
leaderbbox.maxy = MS_MAX(lp1->y,lp2->y);
for(p=0; p<map->labelcache.num_rendered_members; p++) {
labelCacheMemberObj *curCachePtr= map->labelcache.rendered_text_symbols[p];
if(msRectOverlap(&leaderbbox, &(curCachePtr->bbox))) {
/* leaderbbox interesects with the curCachePtr's global bbox */
int t;
for(t=0; t<curCachePtr->numtextsymbols; t++) {
int s;
textSymbolObj *ts = curCachePtr->textsymbols[t];
/* check for intersect with textpath */
if(ts->textpath && testSegmentLabelBBoxIntersection(&leaderbbox, lp1, lp2, &ts->textpath->bounds) == MS_FALSE) {
return MS_FALSE;
}
/* check for intersect with label's labelpnt styles */
if(ts->style_bounds) {
for(s=0; s<ts->label->numstyles; s++) {
if(ts->label->styles[s]->_geomtransform.type == MS_GEOMTRANSFORM_LABELPOINT) {
if(testSegmentLabelBBoxIntersection(&leaderbbox, lp1,lp2, ts->style_bounds[s]) == MS_FALSE) {
return MS_FALSE;
}
}
}
}
}
if(curCachePtr->leaderbbox) {
if(msIntersectSegments(lp1,lp2,&(curCachePtr->leaderline->point[0]), &(curCachePtr->leaderline->point[1])) == MS_TRUE) {
return MS_FALSE;
}
}
}
}
return MS_TRUE;
}
/* msTestLabelCacheCollisions()
**
** Compares label bounds (in *bounds) against labels already drawn and markers from cache and
** returns MS_FALSE if it collides with another label, or collides with a marker.
**
** This function is used by the various msDrawLabelCacheXX() implementations.
int msTestLabelCacheCollisions(mapObj *map, labelCacheMemberObj *cachePtr, label_bounds *bounds,
int current_priority, int current_label);
*/
int msTestLabelCacheCollisions(mapObj *map, labelCacheMemberObj *cachePtr, label_bounds *lb,
int current_priority, int current_label)
{
labelCacheObj *labelcache = &(map->labelcache);
int i, p, ll;
/*
* Check against image bounds first
*/
if(!cachePtr->textsymbols[0]->label->partials) {
if(labelInImage(map->width, map->height, lb->poly, &lb->bbox, labelcache->gutter) == MS_FALSE) {
return MS_FALSE;
}
}
/* 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(NULL, &markerslot->markers[ll].bounds, lb->poly, &lb->bbox ) == MS_TRUE ) {
return MS_FALSE;
}
}
}
}
for(p=0; p<labelcache->num_rendered_members; p++) {
labelCacheMemberObj *curCachePtr= labelcache->rendered_text_symbols[p];
if(msRectOverlap(&curCachePtr->bbox,&lb->bbox)) {
for(i=0; i<curCachePtr->numtextsymbols; i++) {
int j;
textSymbolObj *ts = curCachePtr->textsymbols[i];
if(ts->textpath && intersectLabelPolygons(ts->textpath->bounds.poly, &ts->textpath->bounds.bbox, lb->poly, &lb->bbox) == MS_TRUE ) {
return MS_FALSE;
}
if(ts->style_bounds) {
for(j=0;j<ts->label->numstyles;j++) {
if(ts->style_bounds[j] && ts->label->styles[j]->_geomtransform.type == MS_GEOMTRANSFORM_LABELPOINT) {
if(intersectLabelPolygons(ts->style_bounds[j]->poly, &ts->style_bounds[j]->bbox,
lb->poly, &lb->bbox)) {
return MS_FALSE;
}
}
}
}
}
}
if(curCachePtr->leaderline) {
if(testSegmentLabelBBoxIntersection(curCachePtr->leaderbbox, &curCachePtr->leaderline->point[0],
&curCachePtr->leaderline->point[1], lb) == MS_FALSE) {
return MS_FALSE;
}
}
}
return MS_TRUE;
}
/* utility function to get the rect of a string outside of a rendering loop, i.e.
without going through textpath layouts */
int msGetStringSize(mapObj *map, labelObj *label, int size, char *string, rectObj *r) {
textSymbolObj ts;
double lsize = label->size;
initTextSymbol(&ts);
label->size = size;
msPopulateTextSymbolForLabelAndString(&ts,label,msStrdup(string),1,1,0);
if(UNLIKELY(MS_FAILURE == msGetTextSymbolSize(map,&ts,r)))
return MS_FAILURE;
label->size = lsize;
freeTextSymbol(&ts);
return MS_SUCCESS;
}
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 msGetTextSymbolSize(mapObj *map, textSymbolObj *ts, rectObj *r) {
if(!ts->textpath) {
if(UNLIKELY(MS_FAILURE == msComputeTextPath(map,ts)))
return MS_FAILURE;
}
*r = ts->textpath->bounds.bbox;
return MS_SUCCESS;
}
/*
** Note: All these routines assume a reference point at the LL corner of the text. GD's
** bitmapped fonts use UL and this is compensated for. Note the rect is relative to the
** LL corner of the text to be rendered, this is first line for TrueType fonts.
*/
#define MARKER_SLOP 2
pointObj get_metrics(pointObj *p, int position, textPathObj *tp, int ox, int oy, double rotation, int buffer, label_bounds *bounds)
{
pointObj q;
double x1=0, y1=0, x2=0, y2=0;
double sin_a,cos_a;
double w, h, x, y;
w = tp->bounds.bbox.maxx - tp->bounds.bbox.minx;
h = tp->bounds.bbox.maxy - tp->bounds.bbox.miny;
switch(position) {
case MS_UL:
x1 = -w - ox;
y1 = -oy;
break;
case MS_UC:
x1 = -(w/2.0);
y1 = -oy - MARKER_SLOP;
break;
case MS_UR:
x1 = ox;
y1 = -oy;
break;
case MS_CL:
x1 = -w - ox - MARKER_SLOP;
if(oy > 0 && tp->numlines == 1)
y1 = oy;
else
y1 = (h/2.0);
break;
case MS_CC:
x1 = -(w/2.0) + ox;
y1 = (h/2.0) + oy;
break;
case MS_CR:
x1 = ox + MARKER_SLOP;
if(oy > 0 && tp->numlines == 1)