///////////////////////////////////////////////////////////////////////////////
// Called when applying a point style on a feature geometry. Point styles can
// be applied to all feature geometry types.
void SE_Renderer::ProcessPoint(SE_ApplyContext* ctx, SE_RenderPointStyle* style, RS_Bounds* bounds)
{
// the feature geometry we're applying the style on...
LineBuffer* featGeom = ctx->geometry;
double angleRad = 0.0;
if (style->angleControl == SE_AngleControl_FromGeometry)
{
switch (featGeom->geom_type())
{
case GeometryType_LineString:
case GeometryType_MultiLineString:
case GeometryType_Polygon:
case GeometryType_MultiPolygon:
{
double x0, y0;
featGeom->Centroid(LineBuffer::ctLine, &x0, &y0, &angleRad);
break;
}
}
}
angleRad += style->angleRad;
// also account for any viewport rotation
angleRad += GetWorldToScreenRotation();
SE_Matrix xform;
bool yUp = YPointsUp();
// see StylizationEngine::Stylize for a detailed explanation of these transforms
SE_Matrix xformbase;
xformbase.translate(style->offset[0], style->offset[1]);
xformbase.rotate(yUp? angleRad : -angleRad);
xformbase.premultiply(*ctx->xform);
// render the points
for (int i=0; i<featGeom->point_count(); ++i)
{
double x, y;
featGeom->get_point(i, x, y);
// transform to screen space - feature geometry is in [the original] mapping space
WorldToScreenPoint(x, y, x, y);
xform = xformbase;
xform.translate(x, y);
if (style->drawLast)
AddLabel(featGeom, style, xform, angleRad);
else
DrawSymbol(style->symbol, xform, angleRad, style->addToExclusionRegion);
}
if (bounds)
{
// get the symbol bounds after applying the transforms
bounds->minx = bounds->miny = +DBL_MAX;
bounds->maxx = bounds->maxy = -DBL_MAX;
for (int i=0; i<4; ++i)
{
RS_F_Point xfpt;
xformbase.transform(style->bounds[i].x, style->bounds[i].y, xfpt.x, xfpt.y);
bounds->add_point(xfpt);
}
}
}
void PolygonAdapter::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 an area style, so quit
if (FeatureTypeStyleVisitor::DetermineFeatureTypeStyle(style) != FeatureTypeStyleVisitor::ftsArea)
return;
//-------------------------------------------------------
// determine the rule for the feature
//-------------------------------------------------------
MdfModel::RuleCollection* arc = style->GetRules();
MdfModel::AreaRule* rule = NULL;
for (int i=0; i<arc->GetCount(); ++i)
{
rule = static_cast<MdfModel::AreaRule*>(arc->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::AreaSymbolization2D* asym = rule->GetSymbolization();
if (asym == NULL)
return;
//-------------------------------------------------------
// evaluate the style to use
//-------------------------------------------------------
// quick check if style is already cached
RS_FillStyle* fillStyle = m_hAreaSymCache[asym];
if (!fillStyle)
{
// if not, then we need to either cache or evaluate it
fillStyle = &m_fillStyle;
ObtainStyle(asym, *fillStyle);
}
//-------------------------------------------------------
// compute the clip offset from the styles
//-------------------------------------------------------
double clipOffsetWU = 0.0; // in mapping units
bool bClip = renderer->RequiresClipping();
bool bLabelClip = renderer->RequiresLabelClipping();
if (bClip || bLabelClip)
{
double mapScale = renderer->GetMapScale();
// in meters in device units
double clipOffsetMeters = GetClipOffset(fillStyle->outline(), mapScale);
// add one pixel's worth to handle any roundoff
clipOffsetMeters += METERS_PER_INCH / renderer->GetDpi();
// limit the offset to something reasonable
if (clipOffsetMeters > MAX_CLIPOFFSET_IN_METERS)
clipOffsetMeters = MAX_CLIPOFFSET_IN_METERS;
// convert to mapping units
clipOffsetWU = clipOffsetMeters * mapScale / renderer->GetMetersPerUnit();
}
//-------------------------------------------------------
// prepare the geometry on which to apply the style
//-------------------------------------------------------
LineBuffer* lb = geometry;
std::auto_ptr<LineBuffer> spClipLB;
if (bClip)
{
// the clip region is the map request extents expanded by the offset
RS_Bounds clip = renderer->GetBounds();
clip.minx -= clipOffsetWU;
clip.miny -= clipOffsetWU;
clip.maxx += clipOffsetWU;
clip.maxy += clipOffsetWU;
// clip geometry to given extents
LineBuffer* lbc = lb->Clip(clip, 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
//-------------------------------------------------------
renderer->ProcessPolygon(lb, *fillStyle);
//-------------------------------------------------------
// do labeling if needed
//-------------------------------------------------------
MdfModel::Label* label = rule->GetLabel();
if (label && label->GetSymbol())
{
// Make sure the geometry is clipped if label clipping is specified.
// If bClip is true then the geometry is already clipped.
if (!bClip && bLabelClip)
{
// the clip region is the map request extents expanded by the offset
RS_Bounds clip = renderer->GetBounds();
clip.minx -= clipOffsetWU;
clip.miny -= clipOffsetWU;
clip.maxx += clipOffsetWU;
clip.maxy += clipOffsetWU;
LineBuffer* lbc = lb->Clip(clip, 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);
}
}
double cx = std::numeric_limits<double>::quiet_NaN();
double cy = std::numeric_limits<double>::quiet_NaN();
double dummy;
// multi should work for simple polygons too
lb->Centroid(LineBuffer::ctArea, &cx, &cy, &dummy);
if (!_isnan(cx) && !_isnan(cy))
AddLabel(cx, cy, 0.0, false, label, RS_OverpostType_AllFit, true, renderer, lb);
}
// free clipped line buffer if the geometry was clipped
if (spClipLB.get())
LineBufferPool::FreeLineBuffer(m_lbPool, spClipLB.release());
}
void PolylineAdapter::Stylize(Renderer* renderer,
RS_FeatureReader* features,
bool initialPass,
FdoExpressionEngine* exec,
LineBuffer* geometry,
MdfModel::FeatureTypeStyle* style,
const MdfModel::MdfString* tooltip,
const MdfModel::MdfString* url,
RS_ElevationSettings* elevSettings,
CSysTransformer* /*layer2mapxformer*/)
{
m_exec = exec;
// no need to do anything if the style is not a line style, so quit
if (FeatureTypeStyleVisitor::DetermineFeatureTypeStyle(style) != FeatureTypeStyleVisitor::ftsLine)
return;
//-------------------------------------------------------
// determine the rule for the feature
//-------------------------------------------------------
MdfModel::RuleCollection* lrc = style->GetRules();
MdfModel::LineRule* rule = NULL;
for (int i=0; i<lrc->GetCount(); ++i)
{
rule = static_cast<MdfModel::LineRule*>(lrc->GetAt(i));
// apply any filter on the rule - if it fails move to the next rule
if (!ExecFdoFilter(&rule->GetFilter()))
{
// don't stylize with failed rule
rule = NULL;
continue;
}
break;
}
if (!rule)
return;
MdfModel::LineSymbolizationCollection* lsymc = rule->GetSymbolizations();
if (lsymc == NULL)
return;
int nSyms = lsymc->GetCount();
//-------------------------------------------------------
// evaluate all the styles once
//-------------------------------------------------------
// temporary array used to store pointers to each evaluated style
RS_LineStroke** ppStrokes = (RS_LineStroke**)alloca(nSyms * sizeof(RS_LineStroke*));
if (!ppStrokes)
return;
size_t tempIndex = 0;
for (int i=0; i<nSyms; ++i)
{
MdfModel::LineSymbolization2D* lsym = lsymc->GetAt(i);
// don't render if there's no symbolization
if (lsym == NULL)
{
ppStrokes[i] = NULL;
continue;
}
// quick check if style is already cached
RS_LineStroke* cachedStyle = m_hLineSymCache[lsym];
if (cachedStyle)
{
ppStrokes[i] = cachedStyle;
}
else
{
// if not, then we need to either cache or evaluate it
// make sure the vector has a style in the slot we need
if (tempIndex >= m_lineSyms.size())
{
_ASSERT(tempIndex == m_lineSyms.size());
// allocate a new style and add it to the vector
m_lineSyms.push_back(new RS_LineStroke());
}
// use the existing style in the vector
ppStrokes[i] = m_lineSyms[tempIndex];
ObtainStyle(lsym, *ppStrokes[i]);
++tempIndex;
}
}
//-------------------------------------------------------
// compute the clip offset from the styles
//-------------------------------------------------------
double clipOffsetWU = 0.0; // in mapping units
bool bClip = renderer->RequiresClipping();
bool bLabelClip = renderer->RequiresLabelClipping();
if (bClip || bLabelClip)
{
double mapScale = renderer->GetMapScale();
double clipOffsetMeters = 0.0; // in device units
for (int i=0; i<nSyms; ++i)
{
if (ppStrokes[i])
{
double styleClipOffset = GetClipOffset(*ppStrokes[i], mapScale);
clipOffsetMeters = rs_max(styleClipOffset, clipOffsetMeters);
}
}
// add one pixel's worth to handle any roundoff
clipOffsetMeters += METERS_PER_INCH / renderer->GetDpi();
// limit the offset to something reasonable
if (clipOffsetMeters > MAX_CLIPOFFSET_IN_METERS)
clipOffsetMeters = MAX_CLIPOFFSET_IN_METERS;
// convert to mapping units
clipOffsetWU = clipOffsetMeters * mapScale / renderer->GetMetersPerUnit();
}
//-------------------------------------------------------
// prepare the geometry on which to apply the style
//-------------------------------------------------------
LineBuffer* lb = geometry;
std::auto_ptr<LineBuffer> spClipLB;
if (bClip)
{
// the clip region is the map request extents expanded by the offset
RS_Bounds clip = renderer->GetBounds();
clip.minx -= clipOffsetWU;
clip.miny -= clipOffsetWU;
clip.maxx += clipOffsetWU;
clip.maxy += clipOffsetWU;
// clip geometry to given extents
LineBuffer* lbc = lb->Clip(clip, 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
//-------------------------------------------------------
for (int i=0; i<nSyms; ++i)
{
if (ppStrokes[i])
renderer->ProcessPolyline(lb, *ppStrokes[i]);
}
//-------------------------------------------------------
// do labeling if needed
//-------------------------------------------------------
MdfModel::Label* label = rule->GetLabel();
if (label && label->GetSymbol())
{
// Make sure the geometry is clipped if label clipping is specified.
// If bClip is true then the geometry is already clipped.
if (!bClip && bLabelClip)
{
// the clip region is the map request extents expanded by the offset
RS_Bounds clip = renderer->GetBounds();
clip.minx -= clipOffsetWU;
clip.miny -= clipOffsetWU;
clip.maxx += clipOffsetWU;
clip.maxy += clipOffsetWU;
LineBuffer* lbc = lb->Clip(clip, 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);
}
}
double cx = std::numeric_limits<double>::quiet_NaN();
double cy = std::numeric_limits<double>::quiet_NaN();
double slope_rad = 0.0;
// multi should work for simple polylines too
lb->Centroid(LineBuffer::ctLine, &cx, &cy, &slope_rad);
if (!_isnan(cx) && !_isnan(cy))
AddLabel(cx, cy, slope_rad, true, label, RS_OverpostType_AllFit, true, renderer, label->GetSymbol()->IsAdvancedPlacement()? lb : NULL);
}
// free clipped line buffer if the geometry was clipped
if (spClipLB.get())
LineBufferPool::FreeLineBuffer(m_lbPool, spClipLB.release());
}
void SE_PositioningAlgorithms::Default(SE_ApplyContext* applyCtx,
SE_RenderStyle* rstyle)
{
// the style needs to contain at least one primitive
SE_RenderPrimitiveList& prims = rstyle->symbol;
if (prims.size() == 0)
return;
SE_Renderer* se_renderer = applyCtx->renderer;
LineBuffer* geometry = applyCtx->geometry;
SE_Matrix& xform = *applyCtx->xform;
double cx = 0.0;
double cy = 0.0;
double offsetX = 0.0;
double offsetY = 0.0;
double angleRad = 0.0;
switch (rstyle->type)
{
case SE_RenderStyle_Point:
{
SE_RenderPointStyle* rpStyle = (SE_RenderPointStyle*)rstyle;
// get the feature centroid (no angle for point centroids)
geometry->Centroid(LineBuffer::ctPoint, &cx, &cy, NULL);
// account for the point usage angle control and offset
angleRad = rpStyle->angleRad;
offsetX = rpStyle->offset[0];
offsetY = rpStyle->offset[1];
break;
}
case SE_RenderStyle_Line:
{
SE_RenderLineStyle* rlStyle = (SE_RenderLineStyle*)rstyle;
// get the feature centroid and angle
double fAngleRad;
geometry->Centroid(LineBuffer::ctLine, &cx, &cy, &fAngleRad);
// account for the angle control
angleRad = rlStyle->angleRad;
if (rlStyle->angleControl == SE_AngleControl_FromGeometry)
angleRad += fAngleRad;
break;
}
case SE_RenderStyle_Area:
{
SE_RenderAreaStyle* raStyle = (SE_RenderAreaStyle*)rstyle;
// get the feature centroid (no angle for area centroids)
geometry->Centroid(LineBuffer::ctArea, &cx, &cy, NULL);
// account for the angle control
angleRad = raStyle->angleRad;
break;
}
}
// don't add a label if we can't compute the centroid
if (_isnan(cx) || _isnan(cy))
return;
// need to convert centroid to screen units
se_renderer->WorldToScreenPoint(cx, cy, cx, cy);
// also account for any viewport rotation
angleRad += se_renderer->GetWorldToScreenRotation();
// see StylizationEngine::Stylize for a detailed explanation of these transforms
bool yUp = se_renderer->YPointsUp();
SE_Matrix xformLabel;
xformLabel.translate(offsetX, offsetY);
xformLabel.rotate(yUp? angleRad : -angleRad);
xformLabel.premultiply(xform);
xformLabel.translate(cx, cy);
se_renderer->AddLabel(geometry, rstyle, xformLabel, angleRad);
}
void SE_PositioningAlgorithms::EightSurrounding(SE_ApplyContext* applyCtx,
SE_RenderStyle* rstyle,
double mm2su)
{
SE_Renderer* se_renderer = applyCtx->renderer;
LineBuffer* geometry = applyCtx->geometry;
// eight surrounding labeling only applies to point feature geometry
switch (geometry->geom_type())
{
case GeometryType_Point:
case GeometryType_MultiPoint:
break;
default:
return;
}
// eight surrounding labeling only works with point styles
if (rstyle->type != SE_RenderStyle_Point)
return;
// the style needs to contain at least one primitive
SE_RenderPrimitiveList& prims = rstyle->symbol;
if (prims.size() == 0)
return;
SE_RenderPointStyle* rpstyle = (SE_RenderPointStyle*)rstyle;
// get actual feature point and transform to screen space
// TODO: in the case of a multi-point feature we get the average of all the points;
// generating candidate labels around this point doesn't make a whole lot of
// sense
double cx = 0.0;
double cy = 0.0;
geometry->Centroid(LineBuffer::ctPoint, &cx, &cy, NULL);
// don't add a label if we can't compute the centroid
if (_isnan(cx) || _isnan(cy))
return;
se_renderer->WorldToScreenPoint(cx, cy, cx, cy);
// Get the extent of the last drawn point symbol so that we know how much to offset
// the label. This call assumes the symbol draws right before the label.
// TODO: remove this assumption
const RS_F_Point* cfpts = se_renderer->GetLastSymbolExtent();
RS_F_Point fpts[4];
if(cfpts[0].x == 0 && cfpts[0].y == 0 &&
cfpts[1].x == 0 && cfpts[1].y == 0 &&
cfpts[2].x == 0 && cfpts[2].y == 0 &&
cfpts[3].x == 0 && cfpts[3].y == 0)
{
for (int i=0; i<4; ++i)
{
fpts[i].x = cx;
fpts[i].y = cy;
}
}
else
memcpy(fpts, cfpts, 4*sizeof(RS_F_Point));
double dx = fpts[1].x - fpts[0].x;
double dy = fpts[1].y - fpts[0].y;
double symbol_rot_rad = atan2(dy, dx);
// factor out position and rotation
SE_Matrix ixform;
ixform.translate(-cx, -cy); // factor out point position
ixform.rotate(-symbol_rot_rad); // factor out rotation
for (int i=0; i<4; ++i)
ixform.transform(fpts[i].x, fpts[i].y);
bool yUp = se_renderer->YPointsUp();
if (!yUp)
symbol_rot_rad = -symbol_rot_rad;
// unrotated bounds
RS_Bounds symbol_bounds(fpts[0].x, fpts[0].y, fpts[2].x, fpts[2].y);
double symbol_width = symbol_bounds.width(); // symbol width in screen units
double symbol_height = symbol_bounds.height(); // symbol height in screen units
// offset the label from the symbol's edge
double offset = POINT_LABEL_OFFSET_MM * mm2su; // offset in screen units
// make sure we have at least one pixel's worth of offset
double screenUnitsPerPixel = MILLIMETERS_PER_INCH * se_renderer->GetScreenUnitsPerMillimeterDevice() / se_renderer->GetDpi();
if (offset < screenUnitsPerPixel)
offset = screenUnitsPerPixel;
// compute how far label needs to be offset from center point of symbol
double w2 = 0.5 * symbol_width;
double h2 = 0.5 * symbol_height;
double ch = 0.0; // vertical center point
double cw = 0.0; // horizontal center point
w2 += offset;
h2 += offset;
bool useBounds = symbol_bounds.IsValid();
if (useBounds)
{
symbol_bounds.maxx += offset; symbol_bounds.maxy += offset;
symbol_bounds.minx -= offset; symbol_bounds.miny -= offset;
ch = 0.5*(symbol_bounds.maxy + symbol_bounds.miny);
cw = 0.5*(symbol_bounds.maxx + symbol_bounds.minx);
}
// get the viewport rotation
double w2sAngleRad = se_renderer->GetWorldToScreenRotation();
// take into account rotation of the symbol - find increased extents
// of the symbol bounds due to the rotation
double op_pts[16];
if (symbol_rot_rad != 0.0)
{
double cs = cos(symbol_rot_rad);
double sn = sin(symbol_rot_rad);
// check to see if the bounds have been set
double wcs, nwcs, wsn, nwsn, hsn, nhsn, hcs, nhcs, cwsn, cwcs, chsn, chcs;
if (useBounds)
{
wcs = symbol_bounds.maxx * cs; nwcs = symbol_bounds.minx * cs;
wsn = symbol_bounds.maxx * sn; nwsn = symbol_bounds.minx * sn;
hsn = symbol_bounds.maxy * sn; nhsn = symbol_bounds.miny * sn;
hcs = symbol_bounds.maxy * cs; nhcs = symbol_bounds.miny * cs;
}
else
{
wcs = w2 * cs; nwcs = -wcs;
wsn = w2 * sn; nwsn = -wsn;
hsn = h2 * sn; nhsn = -hsn;
hcs = h2 * cs; nhcs = -hcs;
}
cwsn = cw * sn; chsn = ch * sn;
cwcs = cw * cs; chcs = ch * cs;
// Find the octant that the symbol 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).
// NOTE: The symbol rotation includes the viewport rotation. We want to use the
// relative angle between these to compute the quadrant (it's the angle of
// the symbol relative to the viewport which matters).
double relativeAngle = symbol_rot_rad - w2sAngleRad;
double nangle = fmod(relativeAngle * M_180PI, 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)
{
symbol_bounds.maxx = w2; symbol_bounds.minx = -w2;
symbol_bounds.maxy = h2; symbol_bounds.miny = -h2;
}
op_pts[0 ] = symbol_bounds.maxx; op_pts[1 ] = ch;
op_pts[2 ] = symbol_bounds.maxx; op_pts[3 ] = symbol_bounds.maxy;
op_pts[4 ] = cw; op_pts[5 ] = symbol_bounds.maxy;
op_pts[6 ] = symbol_bounds.minx; op_pts[7 ] = symbol_bounds.maxy;
op_pts[8 ] = symbol_bounds.minx; op_pts[9 ] = ch;
op_pts[10] = symbol_bounds.minx; op_pts[11] = symbol_bounds.miny;
op_pts[12] = cw; op_pts[13] = symbol_bounds.miny;
op_pts[14] = symbol_bounds.maxx; op_pts[15] = symbol_bounds.miny;
}
// check if the incoming point style contains just a single text element
bool foundSingleText = false;
if (prims.size() == 1)
{
if (prims[0]->type == SE_RenderPrimitive_Text)
foundSingleText = true;
}
// OK, who says I can't write bad code? Behold:
SE_LabelInfo candidates[8];
double yScale = yUp? 1.0 : -1.0; // which way does y go in the renderer?
double angleRad = rpstyle->angleRad;
// also account for the viewport rotation
angleRad += w2sAngleRad;
if (foundSingleText)
{
// In this case we set the appropriate alignments for the single text element
// in each candidate label. This allows us to draw the symbol directly at the
// candidate points surrounding the feature point.
SE_RenderStyle* st0 = se_renderer->CloneRenderStyle(rpstyle);
((SE_RenderText*)st0->symbol[0])->tdef.halign() = RS_HAlignment_Left;
((SE_RenderText*)st0->symbol[0])->tdef.valign() = RS_VAlignment_Half;
UpdateStyleBounds(st0, se_renderer);
candidates[0].Set(cx + op_pts[ 0], cy + op_pts[ 1]*yScale, RS_Units_Device, angleRad, st0);
SE_RenderStyle* st1 = se_renderer->CloneRenderStyle(st0);
((SE_RenderText*)st1->symbol[0])->tdef.valign() = RS_VAlignment_Descent;
UpdateStyleBounds(st1, se_renderer);
candidates[1].Set(cx + op_pts[ 2], cy + op_pts[ 3]*yScale, RS_Units_Device, angleRad, st1);
SE_RenderStyle* st2 = se_renderer->CloneRenderStyle(st1);
((SE_RenderText*)st2->symbol[0])->tdef.halign() = RS_HAlignment_Center;
UpdateStyleBounds(st2, se_renderer);
candidates[2].Set(cx + op_pts[ 4], cy + op_pts[ 5]*yScale, RS_Units_Device, angleRad, st2);
SE_RenderStyle* st3 = se_renderer->CloneRenderStyle(st2);
((SE_RenderText*)st3->symbol[0])->tdef.halign() = RS_HAlignment_Right;
UpdateStyleBounds(st3, se_renderer);
candidates[3].Set(cx + op_pts[ 6], cy + op_pts[ 7]*yScale, RS_Units_Device, angleRad, st3);
SE_RenderStyle* st4 = se_renderer->CloneRenderStyle(st3);
((SE_RenderText*)st4->symbol[0])->tdef.valign() = RS_VAlignment_Half;
UpdateStyleBounds(st4, se_renderer);
candidates[4].Set(cx + op_pts[ 8], cy + op_pts[ 9]*yScale, RS_Units_Device, angleRad, st4);
SE_RenderStyle* st5 = se_renderer->CloneRenderStyle(st4);
((SE_RenderText*)st5->symbol[0])->tdef.valign() = RS_VAlignment_Ascent;
UpdateStyleBounds(st5, se_renderer);
candidates[5].Set(cx + op_pts[10], cy + op_pts[11]*yScale, RS_Units_Device, angleRad, st5);
SE_RenderStyle* st6 = se_renderer->CloneRenderStyle(st5);
((SE_RenderText*)st6->symbol[0])->tdef.halign() = RS_HAlignment_Center;
UpdateStyleBounds(st6, se_renderer);
candidates[6].Set(cx + op_pts[12], cy + op_pts[13]*yScale, RS_Units_Device, angleRad, st6);
SE_RenderStyle* st7 = se_renderer->CloneRenderStyle(st6);
((SE_RenderText*)st7->symbol[0])->tdef.halign() = RS_HAlignment_Left;
UpdateStyleBounds(st7, se_renderer);
candidates[7].Set(cx + op_pts[14], cy + op_pts[15]*yScale, RS_Units_Device, angleRad, st7);
}
else
{
// In the general case we have to account for the label symbol's extents when we
// position each candidate. For example, for candidate 1 (top right) we adjust the
// position so that the bottom left corner of the label symbol's extent ends up at
// the top right candidate point.
double labelMinX = rpstyle->bounds[0].x;
double labelMinY = rpstyle->bounds[0].y;
double labelMaxX = rpstyle->bounds[2].x;
double labelMaxY = rpstyle->bounds[2].y;
double labelCtrX = 0.5*(labelMinX + labelMaxX);
double labelCtrY = 0.5*(labelMinY + labelMaxY);
SE_RenderStyle* st0 = se_renderer->CloneRenderStyle(rpstyle);
candidates[0].Set(cx + op_pts[ 0] - labelMinX, cy + (op_pts[ 1] - labelCtrY)*yScale, RS_Units_Device, angleRad, st0);
SE_RenderStyle* st1 = se_renderer->CloneRenderStyle(st0);
candidates[1].Set(cx + op_pts[ 2] - labelMinX, cy + (op_pts[ 3] - labelMinY)*yScale, RS_Units_Device, angleRad, st1);
SE_RenderStyle* st2 = se_renderer->CloneRenderStyle(st1);
candidates[2].Set(cx + op_pts[ 4] - labelCtrX, cy + (op_pts[ 5] - labelMinY)*yScale, RS_Units_Device, angleRad, st2);
SE_RenderStyle* st3 = se_renderer->CloneRenderStyle(st2);
candidates[3].Set(cx + op_pts[ 6] - labelMaxX, cy + (op_pts[ 7] - labelMinY)*yScale, RS_Units_Device, angleRad, st3);
SE_RenderStyle* st4 = se_renderer->CloneRenderStyle(st3);
candidates[4].Set(cx + op_pts[ 8] - labelMaxX, cy + (op_pts[ 9] - labelCtrY)*yScale, RS_Units_Device, angleRad, st4);
SE_RenderStyle* st5 = se_renderer->CloneRenderStyle(st4);
candidates[5].Set(cx + op_pts[10] - labelMaxX, cy + (op_pts[11] - labelMaxY)*yScale, RS_Units_Device, angleRad, st5);
SE_RenderStyle* st6 = se_renderer->CloneRenderStyle(st5);
candidates[6].Set(cx + op_pts[12] - labelCtrX, cy + (op_pts[13] - labelMaxY)*yScale, RS_Units_Device, angleRad, st6);
SE_RenderStyle* st7 = se_renderer->CloneRenderStyle(st6);
candidates[7].Set(cx + op_pts[14] - labelMinX, cy + (op_pts[15] - labelMaxY)*yScale, RS_Units_Device, angleRad, st7);
}
se_renderer->ProcessSELabelGroup(candidates, 8, RS_OverpostType_FirstFit, true, NULL);
}
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());
}
