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mapgraticule.c
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mapgraticule.c
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/**********************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Graticule Renderer
* Author: John Novak, Novacell Technologies (jnovak@novacell.com)
*
**********************************************************************
* Copyright (c) 2003, John Novak, Novacell Technologies
*
* 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
****************************************************************************/
#include "mapserver.h"
#include <assert.h>
#include "mapproject.h"
/**********************************************************************************************************************
*
*/
typedef enum
{
posBottom = 1,
posTop,
posLeft,
posRight
} msGraticulePosition;
typedef enum
{
lpDefault = 0,
lpDDMMSS = 1,
lpDDMM,
lpDD
} msLabelProcessingType;
void DefineAxis( int iTickCountTarget, double *Min, double *Max, double *Inc );
static int _AdjustLabelPosition( layerObj *pLayer, shapeObj *pShape, msGraticulePosition ePosition );
static void _FormatLabel( layerObj *pLayer, shapeObj *pShape, double dDataToFormat );
int msGraticuleLayerInitItemInfo(layerObj *layer);
#define MAPGRATICULE_ARC_SUBDIVISION_DEFAULT (256)
#define MAPGRATICULE_ARC_MINIMUM (16)
#define MAPGRATICULE_FORMAT_STRING_DEFAULT "%5.2g"
#define MAPGRATICULE_FORMAT_STRING_DDMMSS "%3d %02d %02d"
#define MAPGRATICULE_FORMAT_STRING_DDMM "%3d %02d"
#define MAPGRATICULE_FORMAT_STRING_DD "%3d"
/**********************************************************************************************************************
*
*/
int msGraticuleLayerOpen(layerObj *layer)
{
graticuleObj *pInfo = (graticuleObj *) layer->layerinfo;
if( pInfo == NULL )
return MS_FAILURE;
pInfo->dincrementlatitude = 15.0;
pInfo->dincrementlongitude = 15.0;
pInfo->dwhichlatitude = -90.0;
pInfo->dwhichlongitude = -180.0;
pInfo->bvertical = 1;
if( layer->numclasses == 0 )
msDebug( "GRID layer has no classes, nothing will be rendered.\n" );
if( layer->numclasses > 0 && layer->class[0]->numlabels > 0 )
pInfo->blabelaxes = 1;
else
pInfo->blabelaxes = 0;
if( pInfo->labelformat == NULL ) {
pInfo->labelformat = (char *) msSmallMalloc( strlen( MAPGRATICULE_FORMAT_STRING_DEFAULT ) + 1 );
pInfo->ilabeltype = (int) lpDefault;
strcpy( pInfo->labelformat, MAPGRATICULE_FORMAT_STRING_DEFAULT );
} else if( strcmp( pInfo->labelformat, "DDMMSS" ) == 0 ) {
pInfo->labelformat = (char *) msSmallMalloc( strlen( MAPGRATICULE_FORMAT_STRING_DDMMSS ) + 1 );
pInfo->ilabeltype = (int) lpDDMMSS;
strcpy( pInfo->labelformat, MAPGRATICULE_FORMAT_STRING_DDMMSS );
} else if( strcmp( pInfo->labelformat, "DDMM" ) == 0 ) {
pInfo->labelformat = (char *) msSmallMalloc( strlen( MAPGRATICULE_FORMAT_STRING_DDMM ) + 1 );
pInfo->ilabeltype = (int) lpDDMM;
strcpy( pInfo->labelformat, MAPGRATICULE_FORMAT_STRING_DDMM );
} else if( strcmp( pInfo->labelformat, "DD" ) == 0 ) {
pInfo->labelformat = (char *) msSmallMalloc( strlen( MAPGRATICULE_FORMAT_STRING_DD ) + 1 );
pInfo->ilabeltype = (int) lpDD;
strcpy( pInfo->labelformat, MAPGRATICULE_FORMAT_STRING_DD );
}
return MS_SUCCESS;
}
/**********************************************************************************************************************
* Return MS_TRUE if layer is open, MS_FALSE otherwise.
*/
int msGraticuleLayerIsOpen(layerObj *layer)
{
if(layer->layerinfo)
return MS_TRUE;
return MS_FALSE;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerClose(layerObj *layer)
{
graticuleObj *pInfo = (graticuleObj *) layer->layerinfo;
if( pInfo->labelformat ) {
free( pInfo->labelformat );
pInfo->labelformat = NULL;
}
if( pInfo->pboundingpoints ) {
free( pInfo->pboundingpoints );
pInfo->pboundingpoints = NULL;
}
if( pInfo->pboundinglines ) {
free( pInfo->pboundinglines );
pInfo->pboundinglines = NULL;
}
free(layer->layerinfo);
layer->layerinfo=NULL;
return MS_SUCCESS;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerWhichShapes(layerObj *layer, rectObj rect, int isQuery)
{
graticuleObj *pInfo = (graticuleObj *) layer->layerinfo;
int iAxisTickCount = 0;
rectObj rectMapCoordinates;
if(msCheckParentPointer(layer->map,"map") == MS_FAILURE)
return MS_FAILURE;
pInfo->dstartlatitude = rect.miny;
pInfo->dstartlongitude = rect.minx;
pInfo->dendlatitude = rect.maxy;
pInfo->dendlongitude = rect.maxx;
pInfo->bvertical = 1;
pInfo->extent = rect;
if( pInfo->minincrement > 0.0 ) {
pInfo->dincrementlongitude = pInfo->minincrement;
pInfo->dincrementlatitude = pInfo->minincrement;
} else if( pInfo->maxincrement > 0.0 ) {
pInfo->dincrementlongitude = pInfo->maxincrement;
pInfo->dincrementlatitude = pInfo->maxincrement;
} else {
pInfo->dincrementlongitude = 0;
pInfo->dincrementlatitude = 0;
}
if( pInfo->maxarcs > 0 )
iAxisTickCount = (int) pInfo->maxarcs;
else if( pInfo->minarcs > 0 )
iAxisTickCount = (int) pInfo->minarcs;
DefineAxis( iAxisTickCount, &pInfo->dstartlongitude, &pInfo->dendlongitude, &pInfo->dincrementlongitude);
DefineAxis( iAxisTickCount, &pInfo->dstartlatitude, &pInfo->dendlatitude, &pInfo->dincrementlatitude);
pInfo->dwhichlatitude = pInfo->dstartlatitude;
pInfo->dwhichlongitude = pInfo->dstartlongitude;
if( pInfo->minincrement > 0.0 && pInfo->maxincrement > 0.0 && pInfo->minincrement == pInfo->maxincrement ) {
pInfo->dincrementlongitude = pInfo->minincrement;
pInfo->dincrementlatitude = pInfo->minincrement;
} else if( pInfo->minincrement > 0.0 ) {
pInfo->dincrementlongitude = pInfo->minincrement;
pInfo->dincrementlatitude = pInfo->minincrement;
} else if( pInfo->maxincrement > 0.0 ) {
pInfo->dincrementlongitude = pInfo->maxincrement;
pInfo->dincrementlatitude = pInfo->maxincrement;
}
/*
* If using PROJ, project rect back into map system, and generate rect corner points in native system.
* These lines will be used when generating labels to get correct placement at arc/rect edge intersections.
*/
rectMapCoordinates = layer->map->extent;
pInfo->pboundinglines = (lineObj *) msSmallMalloc( sizeof( lineObj ) * 4 );
pInfo->pboundingpoints = (pointObj *) msSmallMalloc( sizeof( pointObj ) * 8 );
{
/*
* top
*/
pInfo->pboundinglines[0].numpoints = 2;
pInfo->pboundinglines[0].point = &pInfo->pboundingpoints[0];
pInfo->pboundinglines[0].point[0].x = rectMapCoordinates.minx;
pInfo->pboundinglines[0].point[0].y = rectMapCoordinates.maxy;
pInfo->pboundinglines[0].point[1].x = rectMapCoordinates.maxx;
pInfo->pboundinglines[0].point[1].y = rectMapCoordinates.maxy;
#ifdef USE_PROJ
if(layer->project && msProjectionsDiffer(&(layer->projection), &(layer->map->projection)))
msProjectLine(&layer->map->projection, &layer->projection, &pInfo->pboundinglines[0]);
else
layer->project = MS_FALSE;
#endif
/*
* bottom
*/
pInfo->pboundinglines[1].numpoints = 2;
pInfo->pboundinglines[1].point = &pInfo->pboundingpoints[2];
pInfo->pboundinglines[1].point[0].x = rectMapCoordinates.minx;
pInfo->pboundinglines[1].point[0].y = rectMapCoordinates.miny;
pInfo->pboundinglines[1].point[1].x = rectMapCoordinates.maxx;
pInfo->pboundinglines[1].point[1].y = rectMapCoordinates.miny;
#ifdef USE_PROJ
if(layer->project && msProjectionsDiffer(&(layer->projection), &(layer->map->projection)))
msProjectLine(&layer->map->projection, &layer->projection, &pInfo->pboundinglines[1]);
else
layer->project = MS_FALSE;
#endif
/*
* left
*/
pInfo->pboundinglines[2].numpoints = 2;
pInfo->pboundinglines[2].point = &pInfo->pboundingpoints[4];
pInfo->pboundinglines[2].point[0].x = rectMapCoordinates.minx;
pInfo->pboundinglines[2].point[0].y = rectMapCoordinates.miny;
pInfo->pboundinglines[2].point[1].x = rectMapCoordinates.minx;
pInfo->pboundinglines[2].point[1].y = rectMapCoordinates.maxy;
#ifdef USE_PROJ
if(layer->project && msProjectionsDiffer(&(layer->projection), &(layer->map->projection)))
msProjectLine(&layer->map->projection, &layer->projection, &pInfo->pboundinglines[2]);
else
layer->project = MS_FALSE;
#endif
/*
* right
*/
pInfo->pboundinglines[3].numpoints = 2;
pInfo->pboundinglines[3].point = &pInfo->pboundingpoints[6];
pInfo->pboundinglines[3].point[0].x = rectMapCoordinates.maxx;
pInfo->pboundinglines[3].point[0].y = rectMapCoordinates.miny;
pInfo->pboundinglines[3].point[1].x = rectMapCoordinates.maxx;
pInfo->pboundinglines[3].point[1].y = rectMapCoordinates.maxy;
#ifdef USE_PROJ
if(layer->project && msProjectionsDiffer(&(layer->projection), &(layer->map->projection)))
msProjectLine(&layer->map->projection, &layer->projection, &pInfo->pboundinglines[3]);
else
layer->project = MS_FALSE;
#endif
}
return MS_SUCCESS;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerNextShape(layerObj *layer, shapeObj *shape)
{
graticuleObj *pInfo = (graticuleObj *) layer->layerinfo;
if( pInfo->minsubdivides <= 0.0 || pInfo->maxsubdivides <= 0.0 )
pInfo->minsubdivides = pInfo->maxsubdivides = MAPGRATICULE_ARC_SUBDIVISION_DEFAULT;
shape->numlines = 1;
shape->type = MS_SHAPE_LINE;
shape->line = (lineObj *) msSmallMalloc(sizeof( lineObj ));
shape->line->numpoints = (int) pInfo->maxsubdivides;
/*
* Subdivide and draw current arc, rendering the arc labels first
*/
if( pInfo->bvertical ) {
int iPointIndex;
double dArcDelta = (pInfo->dendlatitude - pInfo->dstartlatitude) / (double) shape->line->numpoints;
double dArcPosition = pInfo->dstartlatitude + dArcDelta;
double dStartY, dDeltaX;
switch( pInfo->ilabelstate ) {
case 0:
if(!pInfo->blabelaxes) { /* Bottom */
pInfo->ilabelstate++;
shape->numlines = 0;
return MS_SUCCESS;
}
dDeltaX = (pInfo->dwhichlongitude - pInfo->pboundinglines[1].point[0].x) / (pInfo->pboundinglines[1].point[1].x - pInfo->pboundinglines[1].point[0].x);
if (dDeltaX < 0)
dDeltaX=dDeltaX*-1;
dStartY = (pInfo->pboundinglines[1].point[1].y - pInfo->pboundinglines[1].point[0].y) * dDeltaX + pInfo->pboundinglines[1].point[0].y;
shape->line->numpoints = (int) 2;
shape->line->point = (pointObj *) msSmallMalloc( sizeof( pointObj ) * 2 );
shape->line->point[0].x = pInfo->dwhichlongitude;
shape->line->point[0].y = dStartY;
shape->line->point[1].x = pInfo->dwhichlongitude;
shape->line->point[1].y = dStartY + dArcDelta;
_FormatLabel( layer, shape, shape->line->point[0].x );
if(_AdjustLabelPosition( layer, shape, posBottom ) != MS_SUCCESS)
return MS_FAILURE;
pInfo->ilabelstate++;
return MS_SUCCESS;
case 1:
if(!pInfo->blabelaxes) { /* Top */
pInfo->ilabelstate++;
shape->numlines = 0;
return MS_SUCCESS;
}
dDeltaX = (pInfo->dwhichlongitude - pInfo->pboundinglines[0].point[0].x) / (pInfo->pboundinglines[0].point[1].x - pInfo->pboundinglines[0].point[0].x );
if (dDeltaX < 0)
dDeltaX=dDeltaX*-1;
dStartY = (pInfo->pboundinglines[0].point[1].y - pInfo->pboundinglines[0].point[0].y) * dDeltaX + pInfo->pboundinglines[0].point[1].y;
shape->line->numpoints = (int) 2;
shape->line->point = (pointObj *) msSmallMalloc( sizeof( pointObj ) * 2 );
shape->line->point[0].x = pInfo->dwhichlongitude;
shape->line->point[0].y = dStartY - dArcDelta;
shape->line->point[1].x = pInfo->dwhichlongitude;
shape->line->point[1].y = dStartY;
_FormatLabel( layer, shape, shape->line->point[0].x );
if(_AdjustLabelPosition( layer, shape, posTop ) != MS_SUCCESS)
return MS_FAILURE;
pInfo->ilabelstate++;
return MS_SUCCESS;
case 2:
shape->line->numpoints = (int) shape->line->numpoints + 1;
shape->line->point = (pointObj *) msSmallMalloc( sizeof( pointObj ) * shape->line->numpoints );
shape->line->point[0].x = pInfo->dwhichlongitude;
shape->line->point[0].y = pInfo->dstartlatitude;
for( iPointIndex = 1; iPointIndex < shape->line->numpoints; iPointIndex++ ) {
shape->line->point[iPointIndex].x = pInfo->dwhichlongitude;
shape->line->point[iPointIndex].y = dArcPosition;
dArcPosition += dArcDelta;
}
pInfo->ilabelstate = 0;
pInfo->dwhichlongitude += pInfo->dincrementlongitude;
break;
default:
pInfo->ilabelstate = 0;
break;
}
} else { /*horizontal*/
int iPointIndex;
double dArcDelta = (pInfo->dendlongitude - pInfo->dstartlongitude) / (double) shape->line->numpoints;
double dArcPosition = pInfo->dstartlongitude + dArcDelta;
double dStartX, dDeltaY;
switch( pInfo->ilabelstate ) {
case 0:
if(!pInfo->blabelaxes) { /* Left side */
pInfo->ilabelstate++;
shape->numlines = 0;
return MS_SUCCESS;
}
dDeltaY = (pInfo->dwhichlatitude - pInfo->pboundinglines[2].point[0].y) / (pInfo->pboundinglines[2].point[1].y - pInfo->pboundinglines[2].point[0].y );
if (dDeltaY < 0)
dDeltaY= dDeltaY*-1;
dStartX = (pInfo->pboundinglines[2].point[1].x - pInfo->pboundinglines[2].point[0].x) * dDeltaY + pInfo->pboundinglines[2].point[0].x;
shape->line->numpoints = (int) 2;
shape->line->point = (pointObj *) msSmallMalloc( sizeof( pointObj ) * 2 );
shape->line->point[0].x = dStartX;
shape->line->point[0].y = pInfo->dwhichlatitude;
shape->line->point[1].x = dStartX + dArcDelta;
shape->line->point[1].y = pInfo->dwhichlatitude;
_FormatLabel( layer, shape, shape->line->point[0].y );
if(_AdjustLabelPosition( layer, shape, posLeft ) != MS_SUCCESS)
return MS_FAILURE;
pInfo->ilabelstate++;
return MS_SUCCESS;
case 1:
if(!pInfo->blabelaxes) { /* Right side */
pInfo->ilabelstate++;
shape->numlines = 0;
return MS_SUCCESS;
}
dDeltaY = (pInfo->dwhichlatitude - pInfo->pboundinglines[3].point[0].y) / (pInfo->pboundinglines[3].point[1].y - pInfo->pboundinglines[3].point[0].y );
if (dDeltaY < 0)
dDeltaY= dDeltaY*-1;
dStartX = (pInfo->pboundinglines[3].point[1].x - pInfo->pboundinglines[3].point[0].x) * dDeltaY + pInfo->pboundinglines[3].point[0].x;
shape->line->numpoints = (int) 2;
shape->line->point = (pointObj *) msSmallMalloc( sizeof( pointObj ) * 2 );
shape->line->point[0].x = dStartX - dArcDelta;
shape->line->point[0].y = pInfo->dwhichlatitude;
shape->line->point[1].x = dStartX;
shape->line->point[1].y = pInfo->dwhichlatitude;
_FormatLabel( layer, shape, shape->line->point[0].y );
if(_AdjustLabelPosition( layer, shape, posRight ) != MS_SUCCESS)
return MS_FAILURE;
pInfo->ilabelstate++;
return MS_SUCCESS;
case 2:
shape->line->numpoints = (int) shape->line->numpoints + 1;
shape->line->point = (pointObj *) msSmallMalloc( sizeof( pointObj ) * shape->line->numpoints );
shape->line->point[0].x = pInfo->dstartlongitude;
shape->line->point[0].y = pInfo->dwhichlatitude;
for(iPointIndex = 1; iPointIndex < shape->line->numpoints; iPointIndex++) {
shape->line->point[iPointIndex].x = dArcPosition;
shape->line->point[iPointIndex].y = pInfo->dwhichlatitude;
dArcPosition += dArcDelta;
}
pInfo->ilabelstate = 0;
pInfo->dwhichlatitude += pInfo->dincrementlatitude;
break;
default:
pInfo->ilabelstate = 0;
break;
}
}
/*
* Increment and move to next arc
*/
if( pInfo->bvertical && pInfo->dwhichlongitude > pInfo->dendlongitude ) {
pInfo->dwhichlatitude = pInfo->dstartlatitude;
pInfo->bvertical = 0;
}
if (pInfo->dwhichlatitude > pInfo->dendlatitude) {
/* free the lineObj and pointObj that have been erroneously allocated beforehand */
msFreeShape(shape);
return MS_DONE;
}
return MS_SUCCESS;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerGetItems(layerObj *layer)
{
char **ppItemName = (char **) msSmallMalloc( sizeof( char * ) );
*ppItemName = (char *) msSmallMalloc( 64 ); /* why is this necessary? */
strcpy( *ppItemName, "Graticule" );
layer->numitems = 1;
layer->items = ppItemName;
return MS_SUCCESS;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerInitItemInfo(layerObj *layer)
{
return MS_SUCCESS;
}
/**********************************************************************************************************************
*
*/
void msGraticuleLayerFreeItemInfo(layerObj *layer)
{
return;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerGetShape(layerObj *layer, shapeObj *shape, resultObj *record)
{
return MS_FAILURE;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerGetExtent(layerObj *layer, rectObj *extent)
{
graticuleObj *pInfo = (graticuleObj *) layer->layerinfo;
if(pInfo) {
*extent = pInfo->extent;
return MS_SUCCESS;
}
return MS_FAILURE;
}
/**********************************************************************************************************************
*
*/
int msGraticuleLayerGetAutoStyle(mapObj *map, layerObj *layer, classObj *c, shapeObj* shape)
{
return MS_SUCCESS;
}
/************************************************************************/
/* msGraticuleLayerFreeIntersectionPoints */
/* */
/* Free intersection object. */
/************************************************************************/
void msGraticuleLayerFreeIntersectionPoints( graticuleIntersectionObj *psValue)
{
int i=0;
if (psValue)
{
for (i=0; i<psValue->nTop; i++)
msFree(psValue->papszTopLabels[i]);
msFree(psValue->papszTopLabels);
msFree(psValue->pasTop);
for (i=0; i<psValue->nBottom; i++)
msFree(psValue->papszBottomLabels[i]);
msFree(psValue->papszBottomLabels);
msFree(psValue->pasBottom);
for (i=0; i<psValue->nLeft; i++)
msFree(psValue->papszLeftLabels[i]);
msFree(psValue->papszLeftLabels);
msFree(psValue->pasLeft);
for (i=0; i<psValue->nRight; i++)
msFree(psValue->papszRightLabels[i]);
msFree(psValue->papszRightLabels);
msFree(psValue->pasRight);
msFree(psValue);
}
}
/************************************************************************/
/* msGraticuleLayerInitIntersectionPoints */
/* */
/* init intersection object. */
/************************************************************************/
static void msGraticuleLayerInitIntersectionPoints( graticuleIntersectionObj *psValue)
{
if (psValue)
{
psValue->nTop = 0;
psValue->pasTop = NULL;
psValue->papszTopLabels = NULL;
psValue->nBottom = 0;
psValue->pasBottom = NULL;
psValue->papszBottomLabels = NULL;
psValue->nLeft = 0;
psValue->pasLeft = NULL;
psValue->papszLeftLabels = NULL;
psValue->nRight = 0;
psValue->pasRight = NULL;
psValue->papszRightLabels = NULL;
}
}
/************************************************************************/
/* msGraticuleLayerGetIntersectionPoints */
/* */
/* Utility function thar returns all intersection positions and */
/* labels (4 sides of the map) for a grid layer. */
/************************************************************************/
graticuleIntersectionObj *msGraticuleLayerGetIntersectionPoints(mapObj *map,
layerObj *layer)
{
shapeObj shapegrid, tmpshape;
rectObj searchrect;
int status;
pointObj oFirstPoint;
pointObj oLastPoint;
lineObj oLineObj;
rectObj cliprect;
graticuleObj *pInfo = NULL;
double dfTmp;
graticuleIntersectionObj *psValues = NULL;
int i=0;
if (layer->connectiontype != MS_GRATICULE)
return NULL;
pInfo = (graticuleObj *) layer->layerinfo;
/*set cellsize if bnot already set*/
if (map->cellsize == 0)
map->cellsize = msAdjustExtent(&(map->extent),map->width,map->height);
psValues = (graticuleIntersectionObj *)msSmallMalloc(sizeof(graticuleIntersectionObj));
msGraticuleLayerInitIntersectionPoints(psValues);
if(layer->transform == MS_TRUE)
searchrect = map->extent;
else {
searchrect.minx = searchrect.miny = 0;
searchrect.maxx = map->width-1;
searchrect.maxy = map->height-1;
}
#ifdef USE_PROJ
if((map->projection.numargs > 0) && (layer->projection.numargs > 0))
msProjectRect(&map->projection, &layer->projection, &searchrect); /* project the searchrect to source coords */
#endif
msLayerOpen(layer);
status = msLayerWhichShapes(layer, searchrect, MS_FALSE);
if(status == MS_DONE) { /* no overlap */
msLayerClose(layer);
return NULL;
} else if(status != MS_SUCCESS) {
msLayerClose(layer);
return NULL;
}
/* step through the target shapes */
msInitShape(&shapegrid);
cliprect.minx = map->extent.minx- map->cellsize;
cliprect.miny = map->extent.miny- map->cellsize;
cliprect.maxx = map->extent.maxx + map->cellsize;
cliprect.maxy = map->extent.maxy + map->cellsize;
/* clip using the layer projection */
/* msProjectRect(&map->projection , &layer->projection, &cliprect); */
while((status = msLayerNextShape(layer, &shapegrid)) == MS_SUCCESS)
{
/*don't really need a class here*/
/*
shapegrid.classindex = msShapeGetClass(layer, &shapegrid, map->scaledenom, NULL, 0);
if((shapegrid.classindex == -1) || (layer->class[shapegrid.classindex]->status == MS_OFF)) {
msFreeShape(&shapegrid);
continue;
}
*/
msInitShape(&tmpshape);
msCopyShape(&shapegrid, &tmpshape);
/* status = msDrawShape(map, layer, &tmpshape, image, -1); */
if(layer->project && msProjectionsDiffer(&(layer->projection), &(map->projection)))
msProjectShape(&layer->projection, &map->projection, &shapegrid);
msClipPolylineRect(&shapegrid, cliprect);
msTransformShapeToPixelRound(&shapegrid, map->extent, map->cellsize);
if(shapegrid.numlines <= 0 || shapegrid.line[0].numpoints < 2) { /* once clipped the shape didn't need to be drawn */
msFreeShape(&shapegrid);
msFreeShape(&tmpshape);
continue;
}
if(shapegrid.numlines >= 1 && shapegrid.line[0].numpoints >=2) /* && shapegrid.text) */
{
int iTmpLine = 0;
int nNumPoints = 0;
/*grid code seems to retunr lines that can double cross the extenst??*/
/*creating a more than one clipped shape. Take the shape that has the most
points, which should be the most likley to be correct*/
if (shapegrid.numlines > 1)
{
for (i=0; i<shapegrid.numlines; i++)
{
if (shapegrid.line[i].numpoints > nNumPoints)
{
nNumPoints = shapegrid.line[i].numpoints;
iTmpLine = i;
}
}
}
/* get the first and last point*/
oFirstPoint.x = shapegrid.line[iTmpLine].point[0].x;
oFirstPoint.y = shapegrid.line[iTmpLine].point[0].y;
oLineObj = shapegrid.line[iTmpLine];
oLastPoint.x = oLineObj.point[oLineObj.numpoints-1].x;
oLastPoint.y = oLineObj.point[oLineObj.numpoints-1].y;
if ( pInfo->bvertical) /*vertical*/
{
/*SHAPES ARE DRAWN FROM BOTTOM TO TOP.*/
/*Normally lines are drawn FROM BOTTOM TO TOP but not always for some reason, so
make sure that firstpoint < lastpoint in y, We are in pixel coordinates so y increases as we
we go down*/
if (oFirstPoint.y < oLastPoint.y)
{
dfTmp = oFirstPoint.x;
oFirstPoint.x = oLastPoint.x;
oLastPoint.x = dfTmp;
dfTmp = oFirstPoint.y;
oFirstPoint.y = oLastPoint.y;
oLastPoint.y = dfTmp;
}
/*first point should cross the BOTTOM base where y== map->height*/
if (abs ((int)oFirstPoint.y - map->height) <=1)
{
char *pszLabel=NULL;
oFirstPoint.y = map->height;
/*validate point is in map width/height*/
if (oFirstPoint.x < 0 || oFirstPoint.x > map->width)
continue;
/*validate point is in map width/height*/
if (oLastPoint.x < 0 || oLastPoint.x > map->width)
continue;
if (shapegrid.text)
pszLabel = msStrdup(shapegrid.text);
else
{
_FormatLabel(layer, &tmpshape, tmpshape.line[0].point[tmpshape.line[0].numpoints-1].x );
if (tmpshape.text)
pszLabel = msStrdup(tmpshape.text);
else
pszLabel = msStrdup("unknown");
}
/*validate that the value is not already in the array*/
if ( psValues->nBottom > 0)
{
/* if (psValues->pasBottom[psValues->nBottom-1].x == oFirstPoint.x)
continue; */
for (i=0; i<psValues->nBottom; i++)
{
if (psValues->pasBottom[i].x == oFirstPoint.x)
break;
}
if (i < psValues->nBottom)
continue;
}
if (psValues->pasBottom == NULL)
{
psValues->pasBottom = (pointObj *)msSmallMalloc(sizeof(pointObj));
psValues->papszBottomLabels = (char **)msSmallMalloc(sizeof(char *));
psValues->nBottom = 1;
}
else
{
psValues->nBottom++;
psValues->pasBottom = (pointObj *)msSmallRealloc(psValues->pasBottom, sizeof(pointObj)*psValues->nBottom);
psValues->papszBottomLabels = (char **)msSmallRealloc(psValues->papszBottomLabels, sizeof(char *)*psValues->nBottom);
}
psValues->pasBottom[psValues->nBottom-1].x = oFirstPoint.x;
psValues->pasBottom[psValues->nBottom-1].y = oFirstPoint.y;
psValues->papszBottomLabels[psValues->nBottom-1] = msStrdup(pszLabel);
msFree(pszLabel);
}
/*first point should cross the TOP base where y==0*/
if (abs((int)oLastPoint.y) <=1)
{
char *pszLabel=NULL;
oLastPoint.y = 0;
/*validate point is in map width/height*/
if (oLastPoint.x < 0 || oLastPoint.x > map->width)
continue;
if (shapegrid.text)
pszLabel = msStrdup(shapegrid.text);
else
{
_FormatLabel(layer, &tmpshape, tmpshape.line[0].point[tmpshape.line[0].numpoints-1].x );
if (tmpshape.text)
pszLabel = msStrdup(tmpshape.text);
else
pszLabel = msStrdup("unknown");
}
/*validate if same value is not already there*/
if ( psValues->nTop > 0)
{
/* if (psValues->pasTop[psValues->nTop-1].x == oLastPoint.x)
continue; */
for (i=0; i<psValues->nTop; i++)
{
if (psValues->pasTop[i].x == oLastPoint.x ||
strcasecmp(pszLabel, psValues->papszTopLabels[i]) == 0)
break;
}
if (i < psValues->nTop)
continue;
}
if (psValues->pasTop == NULL)
{
psValues->pasTop = (pointObj *)msSmallMalloc(sizeof(pointObj));
psValues->papszTopLabels = (char **)msSmallMalloc(sizeof(char *));
psValues->nTop = 1;
}
else
{
psValues->nTop++;
psValues->pasTop = (pointObj *)msSmallRealloc(psValues->pasTop, sizeof(pointObj)*psValues->nTop);
psValues->papszTopLabels = (char **)msSmallRealloc(psValues->papszTopLabels, sizeof(char *)*psValues->nTop);
}
psValues->pasTop[psValues->nTop-1].x = oLastPoint.x;
psValues->pasTop[psValues->nTop-1].y = oLastPoint.y;
psValues->papszTopLabels[psValues->nTop-1] = msStrdup(pszLabel);
msFree(pszLabel);
}
}
else /*horzontal*/
{
/*Normally lines are drawn from left to right but not always for some reason, so
make sure that firstpoint < lastpoint in x*/
if (oFirstPoint.x > oLastPoint.x)
{
dfTmp = oFirstPoint.x;
oFirstPoint.x = oLastPoint.x;
oLastPoint.x = dfTmp;
dfTmp = oFirstPoint.y;
oFirstPoint.y = oLastPoint.y;
oLastPoint.y = dfTmp;
}
/*first point should cross the LEFT base where x=0 axis*/
if (abs((int)oFirstPoint.x) <=1)
{
char *pszLabel=NULL;
oFirstPoint.x = 0;
/*validate point is in map width/height*/
if (oFirstPoint.y < 0 || oFirstPoint.y > map->height)
continue;
if (shapegrid.text)
pszLabel = msStrdup(shapegrid.text);
else
{
_FormatLabel(layer, &tmpshape, tmpshape.line[0].point[tmpshape.line[0].numpoints-1].y );
if (tmpshape.text)
pszLabel = msStrdup(tmpshape.text);
else
pszLabel = msStrdup("unknown");
}
/*validate that the previous value is not the same*/
if ( psValues->nLeft > 0)
{
/* if (psValues->pasLeft[psValues->nLeft-1].y == oFirstPoint.y)
continue; */
for (i=0; i<psValues->nLeft; i++)
{
if (psValues->pasLeft[i].y == oFirstPoint.y)
break;
}
if (i < psValues->nLeft)
continue;
}
if (psValues->pasLeft == NULL)
{
psValues->pasLeft = (pointObj *)msSmallMalloc(sizeof(pointObj));
psValues->papszLeftLabels = (char **)msSmallMalloc(sizeof(char *));
psValues->nLeft = 1;
}
else
{
psValues->nLeft++;
psValues->pasLeft = (pointObj *)msSmallRealloc(psValues->pasLeft, sizeof(pointObj)*psValues->nLeft);
psValues->papszLeftLabels = (char **)msSmallRealloc(psValues->papszLeftLabels, sizeof(char *)*psValues->nLeft);
}
psValues->pasLeft[psValues->nLeft-1].x = oFirstPoint.x;
psValues->pasLeft[psValues->nLeft-1].y = oFirstPoint.y;
psValues->papszLeftLabels[psValues->nLeft-1] = msStrdup(pszLabel);
msFree(pszLabel);
}
/*first point should cross the RIGHT base where x=map=>width axis*/
if (abs((int)oLastPoint.x - map->width) <=1)
{
char *pszLabel=NULL;
oLastPoint.x = map->width;
/*validate point is in map width/height*/
if (oLastPoint.y < 0 || oLastPoint.y > map->height)
continue;
if (shapegrid.text)
pszLabel = msStrdup(shapegrid.text);
else
{
_FormatLabel(layer, &tmpshape, tmpshape.line[0].point[tmpshape.line[0].numpoints-1].y );
if (tmpshape.text)
pszLabel = msStrdup(tmpshape.text);
else
pszLabel = msStrdup("unknown");
}
/*validate that the previous value is not the same*/
if ( psValues->nRight > 0)
{
/* if (psValues->pasRight[psValues->nRight-1].y == oLastPoint.y)
continue; */
for (i=0; i<psValues->nRight; i++)
{
if (psValues->pasRight[i].y == oLastPoint.y)
break;
}
if (i < psValues->nRight)
continue;
}
if (psValues->pasRight == NULL)
{
psValues->pasRight = (pointObj *)msSmallMalloc(sizeof(pointObj));
psValues->papszRightLabels = (char **)msSmallMalloc(sizeof(char *));
psValues->nRight = 1;
}
else
{
psValues->nRight++;
psValues->pasRight = (pointObj *)msSmallRealloc(psValues->pasRight, sizeof(pointObj)*psValues->nRight);
psValues->papszRightLabels = (char **)msSmallRealloc(psValues->papszRightLabels, sizeof(char *)*psValues->nRight);
}
psValues->pasRight[psValues->nRight-1].x = oLastPoint.x;
psValues->pasRight[psValues->nRight-1].y = oLastPoint.y;
psValues->papszRightLabels[psValues->nRight-1] = msStrdup(pszLabel);
msFree(pszLabel);
}
}
msFreeShape(&shapegrid);