void mapObj_prepareQuery(mapObj* self)
{
int status;
status = msCalculateScale(self->extent, self->units, self->width, self->height, self->resolution, &self->scaledenom);
if(status != MS_SUCCESS) self->scaledenom = -1; // degenerate extents ok here
}
int msMapSetExtent( mapObj *map,
double minx, double miny, double maxx, double maxy)
{
map->extent.minx = minx;
map->extent.miny = miny;
map->extent.maxx = maxx;
map->extent.maxy = maxy;
if (!MS_VALID_EXTENT(map->extent)) {
msSetError(MS_MISCERR, "Given map extent is invalid. Check that it " \
"is in the form: minx, miny, maxx, maxy", "setExtent()");
return MS_FAILURE;
}
map->cellsize = msAdjustExtent(&(map->extent), map->width,
map->height);
/* if the map size is also set, recompute scale, ignore errors? */
if( map->width != -1 || map->height != -1 )
msCalculateScale(map->extent, map->units, map->width, map->height,
map->resolution, &(map->scaledenom));
return msMapComputeGeotransform( map );
}
Handle<Value> MSMap::Recompute (const Arguments& args) {
HandleScope scope;
MSMap *map = ObjectWrap::Unwrap<MSMap>(args.This());
mapObj * _map = map->this_;
_map->cellsize = msAdjustExtent(&(_map->extent),
_map->width,
_map->height);
msCalculateScale(_map->extent,
_map->units,
_map->width,
_map->height,
_map->resolution,
&_map->scaledenom);
return scope.Close(Boolean::New(true));
}
/* TODO : the will be msDrawScalebarGD */
imageObj *msDrawScalebar(mapObj *map)
{
int status;
char label[32];
double i, msx;
int j;
int isx, sx, sy, ox, oy, state, dsx;
pointObj p;
rectObj r;
imageObj *image = NULL;
double fontWidth, fontHeight;
outputFormatObj *format = NULL;
strokeStyleObj strokeStyle;
shapeObj shape;
lineObj line;
pointObj points[5];
rendererVTableObj *renderer;
strokeStyle.patternlength=0;
if(map->units == -1) {
msSetError(MS_MISCERR, "Map units not set.", "msDrawScalebar()");
return(NULL);
}
renderer = MS_MAP_RENDERER(map);
if(!renderer || !MS_MAP_RENDERER(map)->supports_pixel_buffer) {
msSetError(MS_MISCERR, "Outputformat not supported for scalebar", "msDrawScalebar()");
return(NULL);
}
/*
* A string containing the ten decimal digits is rendered to compute an average cell size
* for each number, which is used later to place labels on the scalebar.
*/
if(msGetLabelSize(map,&map->scalebar.label,"0123456789",map->scalebar.label.size,&r,NULL) != MS_SUCCESS) {
return NULL;
}
fontWidth = (r.maxx-r.minx)/10.0;
fontHeight = r.maxy -r.miny;
map->cellsize = msAdjustExtent(&(map->extent), map->width, map->height);
status = msCalculateScale(map->extent, map->units, map->width, map->height, map->resolution, &map->scaledenom);
if(status != MS_SUCCESS) {
return(NULL);
}
dsx = map->scalebar.width - 2*HMARGIN;
do {
msx = (map->cellsize * dsx)/(msInchesPerUnit(map->scalebar.units,0)/msInchesPerUnit(map->units,0));
i = roundInterval(msx/map->scalebar.intervals);
snprintf(label, sizeof(label), "%g", map->scalebar.intervals*i); /* last label */
isx = MS_NINT((i/(msInchesPerUnit(map->units,0)/msInchesPerUnit(map->scalebar.units,0)))/map->cellsize);
sx = (map->scalebar.intervals*isx) + MS_NINT((1.5 + strlen(label)/2.0 + strlen(unitText[map->scalebar.units]))*fontWidth);
if(sx <= (map->scalebar.width - 2*HMARGIN)) break; /* it will fit */
dsx -= X_STEP_SIZE; /* change the desired size in hopes that it will fit in user supplied width */
} while(1);
sy = (2*VMARGIN) + MS_NINT(VSPACING*fontHeight) + fontHeight + map->scalebar.height - VSLOP;
/*Ensure we have an image format representing the options for the scalebar.*/
msApplyOutputFormat( &format, map->outputformat,
map->scalebar.transparent,
map->scalebar.interlace,
MS_NOOVERRIDE );
if(map->scalebar.transparent == MS_OFF) {
if(!MS_VALID_COLOR(map->scalebar.imagecolor))
MS_INIT_COLOR(map->scalebar.imagecolor,255,255,255,255);
}
image = msImageCreate(map->scalebar.width, sy, format,
map->web.imagepath, map->web.imageurl, map->resolution, map->defresolution, &map->scalebar.imagecolor);
/* drop this reference to output format */
msApplyOutputFormat( &format, NULL,
MS_NOOVERRIDE, MS_NOOVERRIDE, MS_NOOVERRIDE );
/* did we succeed in creating the image? */
if(!image) {
msSetError(MS_MISCERR, "Unable to initialize image.", "msDrawScalebar()");
return NULL;
}
switch(map->scalebar.align) {
case(MS_ALIGN_LEFT):
ox = HMARGIN;
break;
case(MS_ALIGN_RIGHT):
ox = MS_NINT((map->scalebar.width - sx) + fontWidth);
break;
default:
ox = MS_NINT((map->scalebar.width - sx)/2.0 + fontWidth/2.0); /* center the computed scalebar */
}
oy = VMARGIN;
switch(map->scalebar.style) {
case(0): {
line.numpoints = 5;
line.point = points;
shape.line = &line;
shape.numlines = 1;
if(MS_VALID_COLOR(map->scalebar.color)) {
INIT_STROKE_STYLE(strokeStyle);
strokeStyle.color = &map->scalebar.outlinecolor;
strokeStyle.color->alpha = 255;
strokeStyle.width = 1;
}
map->scalebar.backgroundcolor.alpha = 255;
map->scalebar.color.alpha = 255;
state = 1; /* 1 means filled */
for(j=0; j<map->scalebar.intervals; j++) {
points[0].x = points[4].x = points[3].x = ox + j*isx + 0.5;
points[0].y = points[4].y = points[1].y = oy + 0.5;
points[1].x = points[2].x = ox + (j+1)*isx + 0.5;
points[2].y = points[3].y = oy + map->scalebar.height + 0.5;
if(state == 1 && MS_VALID_COLOR(map->scalebar.color))
renderer->renderPolygon(image,&shape,&map->scalebar.color);
else if(MS_VALID_COLOR(map->scalebar.backgroundcolor))
renderer->renderPolygon(image,&shape,&map->scalebar.backgroundcolor);
if(strokeStyle.color)
renderer->renderLine(image,&shape,&strokeStyle);
sprintf(label, "%g", j*i);
map->scalebar.label.position = MS_CC;
p.x = ox + j*isx; /* + MS_NINT(fontPtr->w/2); */
p.y = oy + map->scalebar.height + MS_NINT(VSPACING*fontHeight);
msDrawLabel(map,image,p,label,&map->scalebar.label,1.0);
state = -state;
}
sprintf(label, "%g", j*i);
ox = ox + j*isx - MS_NINT((strlen(label)*fontWidth)/2.0);
sprintf(label, "%g %s", j*i, unitText[map->scalebar.units]);
map->scalebar.label.position = MS_CR;
p.x = ox; /* + MS_NINT(fontPtr->w/2); */
p.y = oy + map->scalebar.height + MS_NINT(VSPACING*fontHeight);
msDrawLabel(map,image,p,label,&map->scalebar.label,1.0);
break;
}
case(1): {
line.numpoints = 2;
line.point = points;
shape.line = &line;
shape.numlines = 1;
if(MS_VALID_COLOR(map->scalebar.color)) {
strokeStyle.width = 1;
strokeStyle.color = &map->scalebar.color;
}
points[0].y = points[1].y = oy;
points[0].x = ox;
points[1].x = ox + isx*map->scalebar.intervals;
renderer->renderLine(image,&shape,&strokeStyle);
points[0].y = oy;
points[1].y = oy + map->scalebar.height;
p.y = oy + map->scalebar.height + MS_NINT(VSPACING*fontHeight);
for(j=0; j<=map->scalebar.intervals; j++) {
points[0].x = points[1].x = ox + j*isx;
renderer->renderLine(image,&shape,&strokeStyle);
sprintf(label, "%g", j*i);
if(j!=map->scalebar.intervals) {
map->scalebar.label.position = MS_CC;
p.x = ox + j*isx; /* + MS_NINT(fontPtr->w/2); */
} else {
sprintf(label, "%g %s", j*i, unitText[map->scalebar.units]);
map->scalebar.label.position = MS_CR;
p.x = ox + j*isx - MS_NINT((strlen(label)*fontWidth)/2.0);
}
msDrawLabel(map,image,p,label,&map->scalebar.label,1.0);
}
break;
}
default:
msSetError(MS_MISCERR, "Unsupported scalebar style.", "msDrawScalebar()");
return(NULL);
}
return(image);
}