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Fix unchecked access to command buffer.

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In the example application, clicking on the Combo list under Widgets
will cause an assert.  This commit checks if the command buffer is empty
before attempting to access it.
This commit is contained in:
Dale Kim 2014-08-13 13:09:11 -05:00
parent 9a426faf4f
commit eaef343d01
1 changed files with 8 additions and 4 deletions
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12
imgui.cpp
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@ -4660,10 +4660,14 @@ void ImDrawList::ReserveVertices(unsigned int vtx_count)
{
if (vtx_count > 0)
{
ImDrawCmd& draw_cmd = commands.back();
draw_cmd.vtx_count += vtx_count;
vtx_buffer.resize(vtx_buffer.size() + vtx_count);
vtx_write = &vtx_buffer[vtx_buffer.size() - vtx_count];
if (!commands.empty())
{
ImDrawCmd& draw_cmd = commands.back();
draw_cmd.vtx_count += vtx_count;
}
vtx_buffer.resize(vtx_buffer.size() + vtx_count);
vtx_write = &vtx_buffer[vtx_buffer.size() - vtx_count];
}
}