void GLShapeRenderer::renderPolygon(LKSurface& Surface, const XShape& shape, Brush& brush, const ScreenProjection& _Proj) {
/*
OpenGL cannot draw complex polygons so we need to use a Tessallator to draw the polygon using a GL_TRIANGLE_FAN
*/
#ifdef USE_GLSL
OpenGL::solid_shader->Use();
#endif
brush.Bind();
std::unique_ptr<const GLBlend> blend;
if(!brush.IsOpaque()) {
blend = std::make_unique<const GLBlend>(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
curr_LabelPos = clipRect.GetBottomRight();
const shapeObj& shp = shape.shape;
gluTessBeginPolygon(tess, this );
for (int j = 0; j < shp.numlines; j++) {
gluTessBeginContour(tess);
for (int i = 0; i < shp.line[j].numpoints; i++) {
const RasterPoint pt = _Proj.LonLat2Screen(shp.line[j].point[i]);
if (!noLabel && (pt.x<=curr_LabelPos.x)) {
curr_LabelPos = pt;
}
vertex_t& vertex = *(pointers.insert(pointers.end(), vertex_t({{(GLdouble)pt.x, (GLdouble)pt.y, 0.}})));
gluTessVertex(tess, vertex.data(), vertex.data());
}
gluTessEndContour(tess);
}
gluTessEndPolygon(tess);
if(shape.HasLabel() && clipRect.IsInside(curr_LabelPos)) {
shape.renderSpecial(Surface, curr_LabelPos.x, curr_LabelPos.y, clipRect);
}
pointers.clear();
}
void Topology::Paint(HDC hdc, RECT rc) {
if (!shapefileopen) return;
bool nolabels=false;
if (scaleCategory==10) {
// for water areas, use scaleDefault
if ( MapWindow::zoom.RealScale()>scaleDefaultThreshold) {
return;
}
// since we just checked category 10, if we are over scale we set nolabels
if ( MapWindow::zoom.RealScale()>scaleThreshold) nolabels=true;
} else if (MapWindow::zoom.RealScale() > scaleThreshold) return;
// TODO code: only draw inside screen!
// this will save time with rendering pixmaps especially
// checkVisible does only check lat lon , not screen pixels..
// We need to check also screen.
HPEN hpOld;
HBRUSH hbOld;
HFONT hfOld;
if (hPen) {
hpOld = (HPEN)SelectObject(hdc, hPen);
hbOld = (HBRUSH)SelectObject(hdc, hbBrush);
} else {
hpOld = NULL;
hbOld = NULL;
}
hfOld = (HFONT)SelectObject(hdc, MapLabelFont);
// get drawing info
int iskip = 1;
// attempt to bugfix 100615 polyline glitch with zoom over 33Km
// do not skip points, if drawing coast lines which have a scaleThreshold of 100km!
// != 5 and != 10
if (scaleCategory>10) {
if (MapWindow::zoom.RealScale()>0.25*scaleThreshold) {
iskip = 2;
}
if (MapWindow::zoom.RealScale()>0.5*scaleThreshold) {
iskip = 3;
}
if (MapWindow::zoom.RealScale()>0.75*scaleThreshold) {
iskip = 4;
}
}
#if TOPOFASTLABEL
// use the already existing screenbounds_latlon, calculated by CalculateScreenPositions in MapWindow2
rectObj screenRect = MapWindow::screenbounds_latlon;
#else
rectObj screenRect = MapWindow::CalculateScreenBounds(0.0);
#endif
static POINT pt[MAXCLIPPOLYGON];
bool labelprinted=false;
for (int ixshp = 0; ixshp < shpfile.numshapes; ixshp++) {
XShape *cshape = shpCache[ixshp];
if (!cshape || cshape->hide) continue;
shapeObj *shape = &(cshape->shape);
switch(shape->type) {
case(MS_SHAPE_POINT): {
#if 101016
// -------------------------- NOT PRINTING ICONS ---------------------------------------------
bool dobitmap=false;
if (scaleCategory<90 || (MapWindow::zoom.RealScale()<2)) dobitmap=true;
// first a latlon overlap check, only approximated because of fastcosine in latlon2screen
if (checkVisible(*shape, screenRect))
for (int tt = 0; tt < shape->numlines; tt++) {
for (int jj=0; jj< shape->line[tt].numpoints; jj++) {
POINT sc;
MapWindow::LatLon2Screen(shape->line[tt].point[jj].x, shape->line[tt].point[jj].y, sc);
if (dobitmap) {
// bugfix 101212 missing case for scaleCategory 0 (markers)
if (scaleCategory==0||cshape->renderSpecial(hdc, sc.x, sc.y,labelprinted))
MapWindow::DrawBitmapIn(hdc, sc, hBitmap,true);
} else {
cshape->renderSpecial(hdc, sc.x, sc.y,labelprinted);
}
}
}
}
#else
// -------------------------- PRINTING ICONS ---------------------------------------------
#if (TOPOFAST)
// no bitmaps for small town over a certain zoom level and no bitmap if no label at all levels
bool nobitmap=false, noiconwithnolabel=false;
if (scaleCategory==90 || scaleCategory==100) {
noiconwithnolabel=true;
if (MapWindow::MapScale>4) nobitmap=true;
}
#endif
//#if TOPOFASTLABEL
if (checkVisible(*shape, screenRect))
for (int tt = 0; tt < shape->numlines; tt++) {
for (int jj=0; jj< shape->line[tt].numpoints; jj++) {
POINT sc;
MapWindow::LatLon2Screen(shape->line[tt].point[jj].x, shape->line[tt].point[jj].y, sc);
#if (TOPOFAST)
if (!nobitmap)
#endif
#if 101016
// only paint icon if label is printed too
if (noiconwithnolabel) {
if (cshape->renderSpecial(hdc, sc.x, sc.y,labelprinted))
MapWindow::DrawBitmapIn(hdc, sc, hBitmap,true);
} else {
MapWindow::DrawBitmapIn(hdc, sc, hBitmap,true);
cshape->renderSpecial(hdc, sc.x, sc.y,labelprinted);
}
#else
MapWindow::DrawBitmapIn(hdc, sc, hBitmap,true);
cshape->renderSpecial(hdc, sc.x, sc.y);
#endif
}
}
}
#endif // Use optimized point icons 1.23e
break;
case(MS_SHAPE_LINE):
if (checkVisible(*shape, screenRect))
for (int tt = 0; tt < shape->numlines; tt ++) {
int minx = rc.right;
int miny = rc.bottom;
int msize = min(shape->line[tt].numpoints, MAXCLIPPOLYGON);
MapWindow::LatLon2Screen(shape->line[tt].point,
pt, msize, 1);
for (int jj=0; jj< msize; jj++) {
if (pt[jj].x<=minx) {
minx = pt[jj].x;
miny = pt[jj].y;
}
}
ClipPolygon(hdc, pt, msize, rc, false);
cshape->renderSpecial(hdc,minx,miny,labelprinted);
}
break;
case(MS_SHAPE_POLYGON):
// if it's a water area (nolabels), print shape up to defaultShape, but print
// labels only up to custom label levels
if ( nolabels ) {
if (checkVisible(*shape, screenRect)) {
for (int tt = 0; tt < shape->numlines; tt ++) {
int minx = rc.right;
int msize = min(shape->line[tt].numpoints/iskip, MAXCLIPPOLYGON);
MapWindow::LatLon2Screen(shape->line[tt].point, pt, msize*iskip, iskip);
for (int jj=0; jj< msize; jj++) {
if (pt[jj].x<=minx) {
minx = pt[jj].x;
}
}
ClipPolygon(hdc,pt, msize, rc, true);
}
}
} else if (checkVisible(*shape, screenRect)) {
for (int tt = 0; tt < shape->numlines; tt ++) {
int minx = rc.right;
int miny = rc.bottom;
int msize = min(shape->line[tt].numpoints/iskip, MAXCLIPPOLYGON);
MapWindow::LatLon2Screen(shape->line[tt].point, pt, msize*iskip, iskip);
for (int jj=0; jj< msize; jj++) {
if (pt[jj].x<=minx) {
minx = pt[jj].x;
miny = pt[jj].y;
}
}
ClipPolygon(hdc,pt, msize, rc, true);
cshape->renderSpecial(hdc,minx,miny,labelprinted);
}
}
break;
default:
break;
}
}
void Topology::Paint(Canvas &canvas, MapWindow &m_window, const RECT rc) {
if (!shapefileopen) return;
MapWindowProjection &map_projection = m_window;
LabelBlock *label_block = m_window.getLabelBlock();
double map_scale = map_projection.GetMapScaleUser();
if (map_scale > scaleThreshold)
return;
// TODO code: only draw inside screen!
// this will save time with rendering pixmaps especially
// we already do an outer visibility test, but may need a test
// in screen coords
canvas.select(hPen);
canvas.select(hbBrush);
canvas.select(MapLabelFont);
// get drawing info
int iskip = 1;
if (map_scale>0.25*scaleThreshold) {
iskip = 2;
}
if (map_scale>0.5*scaleThreshold) {
iskip = 3;
}
if (map_scale>0.75*scaleThreshold) {
iskip = 4;
}
rectObj screenRect = map_projection.CalculateScreenBounds(0.0);
static POINT pt[MAXCLIPPOLYGON];
const bool render_labels = (m_window.SettingsMap().DeclutterLabels<2);
for (int ixshp = 0; ixshp < shpfile.numshapes; ixshp++) {
XShape *cshape = shpCache[ixshp];
if (!cshape || cshape->hide) continue;
shapeObj *shape = &(cshape->shape);
switch(shape->type) {
case(MS_SHAPE_POINT):{
if (checkVisible(*shape, screenRect)) {
for (int tt = 0; tt < shape->numlines; tt++) {
for (int jj=0; jj< shape->line[tt].numpoints; jj++) {
POINT sc;
GEOPOINT l;
l.Longitude = shape->line[tt].point[jj].x;
l.Latitude = shape->line[tt].point[jj].y;
if (m_window.draw_masked_bitmap_if_visible(canvas, hBitmap, l,
10, 10, &sc)) {
if (render_labels)
cshape->renderSpecial(canvas, *label_block, sc.x, sc.y);
}
}
}
}
}; break;
case(MS_SHAPE_LINE):
if (checkVisible(*shape, screenRect))
for (int tt = 0; tt < shape->numlines; tt ++) {
int minx = rc.right;
int miny = rc.bottom;
int msize = min(shape->line[tt].numpoints, MAXCLIPPOLYGON);
map_projection.LonLat2Screen(shape->line[tt].point,
pt, msize, 1);
for (int jj=0; jj< msize; jj++) {
if (pt[jj].x<=minx) {
minx = pt[jj].x;
miny = pt[jj].y;
}
}
canvas.polyline(pt, msize);
if (render_labels)
cshape->renderSpecial(canvas, *label_block, minx, miny);
}
break;
case(MS_SHAPE_POLYGON):
if (checkVisible(*shape, screenRect))
for (int tt = 0; tt < shape->numlines; tt ++) {
int minx = rc.right;
int miny = rc.bottom;
int msize = min(shape->line[tt].numpoints/iskip, MAXCLIPPOLYGON);
map_projection.LonLat2Screen(shape->line[tt].point,
pt, msize*iskip, iskip);
for (int jj=0; jj< msize; jj++) {
if (pt[jj].x<=minx) {
minx = pt[jj].x;
miny = pt[jj].y;
}
}
canvas.polygon(pt, msize);
if (render_labels)
cshape->renderSpecial(canvas, *label_block, minx, miny);
}
break;
default:
break;
}
}
}