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Fix of Segfault moving support blocker #1506

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Fixed unsafe access to support layers from the G-code preview UI.
This commit is contained in:
bubnikv 2019-01-09 14:15:18 +01:00
parent 8515852efc
commit 713ec1f065
1 changed files with 15 additions and 20 deletions
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35
src/slic3r/GUI/GUI_Preview.cpp
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@ -685,29 +685,24 @@ void Preview::load_print_as_fff()
// we require that there's at least one object and the posSlice step
// is performed on all of them(this ensures that _shifted_copies was
// populated and we know the number of layers)
unsigned int n_layers = 0;
bool has_layers = false;
const Print *print = m_process->fff_print();
if (print->is_step_done(posSlice))
{
std::set<float> zs;
if (print->is_step_done(posSlice)) {
for (const PrintObject* print_object : print->objects())
{
const LayerPtrs& layers = print_object->layers();
const SupportLayerPtrs& support_layers = print_object->support_layers();
for (const Layer* layer : layers)
{
zs.insert(layer->print_z);
if (! print_object->layers().empty()) {
has_layers = true;
break;
}
for (const SupportLayer* layer : support_layers)
{
zs.insert(layer->print_z);
}
if (print->is_step_done(posSupportMaterial)) {
for (const PrintObject* print_object : print->objects())
if (! print_object->support_layers().empty()) {
has_layers = true;
break;
}
}
n_layers = (unsigned int)zs.size();
}
if (n_layers == 0)
if (! has_layers)
{
reset_sliders();
m_canvas->reset_legend_texture();
@ -761,8 +756,8 @@ void Preview::load_print_as_fff()
show_hide_ui_elements("full");
// recalculates zs and update sliders accordingly
n_layers = (unsigned int)m_canvas->get_current_print_zs(true).size();
if (n_layers == 0)
has_layers = ! m_canvas->get_current_print_zs(true).empty();
if (! has_layers)
{
// all layers filtered out
reset_sliders();
@ -777,7 +772,7 @@ void Preview::load_print_as_fff()
}
if (n_layers > 0)
if (has_layers)
update_sliders(m_canvas->get_current_print_zs(true));
m_loaded = true;