void GeometryAdapter::AddLabel(double x, double y,
double slope_rad, bool useSlope,
MdfModel::Label* label,
RS_OverpostType type, bool exclude,
Renderer* renderer,
LineBuffer* lb)
{
MdfModel::TextSymbol* text = label->GetSymbol();
RS_String txt;
EvalString(text->GetText(), txt);
if (!txt.empty())
{
RS_TextDef def;
ConvertTextDef(text, def);
if (useSlope)
def.rotation() = slope_rad * M_180PI;
RS_LabelInfo info(x, y, 0.0, 0.0, RS_Units_Model, def);
renderer->ProcessLabelGroup(&info, 1, txt, type, exclude, lb, text->GetScaleLimit());
}
}
void PointAdapter::Stylize(Renderer* renderer,
RS_FeatureReader* features,
bool initialPass,
SE_Evaluator* eval,
LineBuffer* geometry,
MdfModel::FeatureTypeStyle* style,
const MdfModel::MdfString* tooltip,
const MdfModel::MdfString* url,
RS_ElevationSettings* elevSettings,
CSysTransformer* /*layer2mapxformer*/)
{
m_eval = eval;
// no need to do anything if the style is not a point style, so quit
if (FeatureTypeStyleVisitor::DetermineFeatureTypeStyle(style) != FeatureTypeStyleVisitor::ftsPoint)
return;
//-------------------------------------------------------
// determine the rule for the feature
//-------------------------------------------------------
MdfModel::RuleCollection* prc = style->GetRules();
MdfModel::PointRule* rule = NULL;
for (int i=0; i<prc->GetCount(); ++i)
{
rule = static_cast<MdfModel::PointRule*>(prc->GetAt(i));
// apply any filter on the rule - if it fails move to the next rule
if (!ExecFilter(&rule->GetFilter()))
{
// don't stylize with failed rule
rule = NULL;
continue;
}
break;
}
if (!rule)
return;
MdfModel::PointSymbolization2D* psym = rule->GetSymbolization();
MdfModel::PointTypeStyle* pfs = (MdfModel::PointTypeStyle*)style;
//-------------------------------------------------------
// prepare the geometry on which to apply the style
//-------------------------------------------------------
// NOTE: clipping of geometry for rendering (the RequiresClipping
// option) does not need to be done for points. Points
// outside the map extents already get clipped away as part
// of the FDO query.
LineBuffer* lb = geometry;
std::auto_ptr<LineBuffer> spClipLB;
if (renderer->RequiresClipping())
{
// clip geometry to given extents
// NOTE: point styles do not require a clip offset
LineBuffer* lbc = lb->Clip(renderer->GetBounds(), LineBuffer::ctAGF, m_lbPool);
if (lbc != lb)
{
// if the clipped buffer is NULL (completely clipped) just move on to
// the next feature
if (!lbc)
return;
// otherwise continue processing with the clipped buffer
lb = lbc;
if (lb != geometry)
spClipLB.reset(lb);
}
}
//-------------------------------------------------------
// do the StartFeature notification
//-------------------------------------------------------
RS_String tip; //TODO: this should be quick since we are not assigning
RS_String eurl;
const RS_String &theme = rule->GetLegendLabel();
if (tooltip && !tooltip->empty())
EvalString(*tooltip, tip);
if (url && !url->empty())
EvalString(*url, eurl);
// elevation settings
RS_ElevationType elevType = RS_ElevationType_RelativeToGround;
double zOffset = 0.0;
double zExtrusion = 0.0;
GetElevationParams(elevSettings, zOffset, zExtrusion, elevType);
renderer->StartFeature(features, initialPass,
tip.empty()? NULL : &tip,
eurl.empty()? NULL : &eurl,
theme.empty()? NULL : &theme,
zOffset, zExtrusion, elevType);
//-------------------------------------------------------
// apply the style to the geometry using the renderer
//-------------------------------------------------------
// Process point symbol, if any. If there is no point symbol, there may
// be a label which we will use as a symbol instead. This one does not
// obey overposting, it is always there. The marker specified in the rule
// is the one that does overposting.
double mdefW = 0.01;
double mdefH = 0.01;
RS_Units mdefU = RS_Units_Device;
double mdefRot = 0.0;
// the actual position used for the marker by the renderer
// may be returned in this structure to help place labels better
RS_Bounds bounds = RS_Bounds(1.0, 1.0, 0.0, 0.0); // init invalid
if (psym && psym->GetSymbol())
{
// quick check if style is already cached
RS_MarkerDef* cachedStyle = m_hPointSymCache[psym];
if (cachedStyle)
{
mdefW = cachedStyle->width();
mdefH = cachedStyle->height();
mdefU = cachedStyle->units();
mdefRot = cachedStyle->rotation();
renderer->ProcessMarker(lb, *cachedStyle, pfs->IsAllowOverpost(), &bounds);
}
else
{
RS_MarkerDef mdef;
ObtainStyle(psym, mdef);
mdefW = mdef.width();
mdefH = mdef.height();
mdefU = mdef.units();
mdefRot = mdef.rotation();
renderer->ProcessMarker(lb, mdef, pfs->IsAllowOverpost(), &bounds);
}
}
//-------------------------------------------------------
// do labeling if needed
//-------------------------------------------------------
MdfModel::Label* label = rule->GetLabel();
if (label && label->GetSymbol())
{
// NOTE: clipping of geometry for labeling (the RequiresLabelClipping
// option) does not need to be done for points.
// TODO: compute label position
double cx = std::numeric_limits<double>::quiet_NaN();
double cy = std::numeric_limits<double>::quiet_NaN();
double dummy;
// multi should work for simple polygons also
lb->Centroid(LineBuffer::ctPoint, &cx, &cy, &dummy);
if (!_isnan(cx) && !_isnan(cy))
{
// if there was no point symbol, the label is the symbol,
// so we send without overposting and at the center point
if (!psym || !psym->GetSymbol() || pfs->IsDisplayAsText())
{
AddLabel(cx, cy, 0.0, false, label, RS_OverpostType_All, !pfs->IsAllowOverpost(), renderer, lb);
}
else
{
MdfModel::TextSymbol* text = label->GetSymbol();
RS_String txt;
EvalString(text->GetText(), txt);
if (!txt.empty())
{
RS_TextDef def;
ConvertTextDef(text, def);
// if there's a symbol there are 8 possible positions to place the label
// around the symbol
// NOTE: at this point we know that mdef has been initialized with
// whatever was in psym->GetSymbol() and that expressions have
// been evaluated
double op_pts[16];
// offset the label from the symbol's edge
double offset = 0.001 * POINT_LABEL_OFFSET_MM; // in meters
if (def.rotation() != 0.0)
{
// if the text label has rotation put the text at least half the font height
// away, so that it doesn't intersect with the marker at the worst-case (45
// degree) rotation.
offset += 0.5*def.font().height();
}
// in case of mapping space we need to scale by map scale
if (mdefU != RS_Units_Device)
offset *= renderer->GetMapScale();
// compute how far label needs to be offset from center point of symbol
double w = 0.5 * mdefW;
double h = 0.5 * mdefH;
double ch = 0; // vertical center point
double cw = 0; // horizontal center point
w += offset;
h += offset;
bool useBounds = bounds.IsValid();
if (useBounds)
{
bounds.maxx += offset; bounds.maxy += offset;
bounds.minx -= offset; bounds.miny -= offset;
ch = 0.5*(bounds.maxy + bounds.miny);
cw = 0.5*(bounds.maxx + bounds.minx);
}
// take into account rotation of the symbol
// find increased extents of the symbol bounds due to the rotation
if (mdefRot != 0.0)
{
double rotRad = mdefRot * M_PI180;
double cs = cos(rotRad);
double sn = sin(rotRad);
double wcs, nwcs, wsn, nwsn, hsn, nhsn, hcs, nhcs, cwsn, cwcs, chsn, chcs;
// check to see if the bounds have been set
if (useBounds)
{
wcs = bounds.maxx * cs; nwcs = bounds.minx * cs;
wsn = bounds.maxx * sn; nwsn = bounds.minx * sn;
hsn = bounds.maxy * sn; nhsn = bounds.miny * sn;
hcs = bounds.maxy * cs; nhcs = bounds.miny * cs;
}
else
{
wcs = w * cs; nwcs = -wcs;
wsn = w * sn; nwsn = -wsn;
hsn = h * sn; nhsn = -hsn;
hcs = h * cs; nhcs = -hcs;
}
cwsn = cw * sn; chsn = ch * sn;
cwcs = cw * cs; chcs = ch * cs;
// find the octant that the marker is rotated into, and shift the points accordingly.
// this way, the overpost points are still within 22.5 degrees of an axis-aligned box.
// (position 0 will always be the closest to Center-Right)
double nangle = fmod(mdefRot, 360.0);
if (nangle < 0.0)
nangle += 360.0;
int i = (((int)((nangle/45.0) + 0.5)) << 1) & 0x0000000f; // i is 2 * the octant
op_pts[i++] = wcs - chsn; op_pts[i++] = wsn + chcs; i &= 0x0000000f; // & 15 does (mod 16)
op_pts[i++] = wcs - hsn; op_pts[i++] = wsn + hcs; i &= 0x0000000f;
op_pts[i++] = cwcs - hsn; op_pts[i++] = cwsn + hcs; i &= 0x0000000f;
op_pts[i++] = nwcs - hsn; op_pts[i++] = nwsn + hcs; i &= 0x0000000f;
op_pts[i++] = nwcs - chsn; op_pts[i++] = nwsn + chcs; i &= 0x0000000f;
op_pts[i++] = nwcs - nhsn; op_pts[i++] = nwsn + nhcs; i &= 0x0000000f;
op_pts[i++] = cwcs - nhsn; op_pts[i++] = cwsn + nhcs; i &= 0x0000000f;
op_pts[i++] = wcs - nhsn; op_pts[i] = wsn + nhcs;
}
else
{
if (!useBounds)
{
bounds.maxx = w; bounds.minx = -w;
bounds.maxy = h; bounds.miny = -h;
}
op_pts[ 0] = bounds.maxx; op_pts[ 1] = ch;
op_pts[ 2] = bounds.maxx; op_pts[ 3] = bounds.maxy;
op_pts[ 4] = cw; op_pts[ 5] = bounds.maxy;
op_pts[ 6] = bounds.minx; op_pts[ 7] = bounds.maxy;
op_pts[ 8] = bounds.minx; op_pts[ 9] = ch;
op_pts[10] = bounds.minx; op_pts[11] = bounds.miny;
op_pts[12] = cw; op_pts[13] = bounds.miny;
op_pts[14] = bounds.maxx; op_pts[15] = bounds.miny;
}
RS_LabelInfo candidates[8];
def.halign() = RS_HAlignment_Left;
def.valign() = RS_VAlignment_Half;
candidates[0] = RS_LabelInfo(cx, cy, op_pts[0], op_pts[1], mdefU, def);
def.valign() = RS_VAlignment_Descent;
candidates[1] = RS_LabelInfo(cx, cy, op_pts[2], op_pts[3], mdefU, def);
def.halign() = RS_HAlignment_Center;
candidates[2] = RS_LabelInfo(cx, cy, op_pts[4], op_pts[5], mdefU, def);
def.halign() = RS_HAlignment_Right;
candidates[3] = RS_LabelInfo(cx, cy, op_pts[6], op_pts[7], mdefU, def);
def.valign() = RS_VAlignment_Half;
candidates[4] = RS_LabelInfo(cx, cy, op_pts[8], op_pts[9], mdefU, def);
def.valign() = RS_VAlignment_Ascent;
candidates[5] = RS_LabelInfo(cx, cy, op_pts[10], op_pts[11], mdefU, def);
def.halign() = RS_HAlignment_Center;
candidates[6] = RS_LabelInfo(cx, cy, op_pts[12], op_pts[13], mdefU, def);
def.halign() = RS_HAlignment_Left;
candidates[7] = RS_LabelInfo(cx, cy, op_pts[14], op_pts[15], mdefU, def);
renderer->ProcessLabelGroup(candidates, 8, txt, RS_OverpostType_FirstFit, true, lb, text->GetScaleLimit());
}
}
}
}
// free clipped line buffer if the geometry was clipped
if (spClipLB.get())
LineBufferPool::FreeLineBuffer(m_lbPool, spClipLB.release());
}