Rect
Canvas::GetCoverageBounds ()
{
Brush *background = GetBackground ();
if (background && background->IsOpaque ())
return coverage_bounds;
return Rect ();
}
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();
}