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Added assert on index overflow (#292)

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This commit is contained in:
ocornut 2015-08-09 11:05:38 -06:00
parent 48ed0a10d7
commit 915b46f1c1
1 changed files with 10 additions and 0 deletions
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10
imgui.cpp
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@ -486,6 +486,7 @@
#endif
#ifdef _MSC_VER
#pragma warning (disable: 4127) // condition expression is constant
#pragma warning (disable: 4505) // unreferenced local function has been removed (stb stuff)
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#define snprintf _snprintf
@ -2180,6 +2181,15 @@ static void AddDrawListToRenderList(ImVector<ImDrawList*>& out_render_list, ImDr
if (draw_list->CmdBuffer.back().ElemCount == 0)
draw_list->CmdBuffer.pop_back();
out_render_list.push_back(draw_list);
if (sizeof(ImDrawIdx) < 4)
{
// Check that draw_list doesn't use more vertices than indexable (default ImDrawIdx = 2 bytes = 64K vertices)
// If this assert triggers because you are drawing lots of stuff manually, a workaround is to use BeginChild()/EndChild() to put your draw commands in a new draw list
unsigned int max_vtx_idx = (unsigned int)1 << (sizeof(ImDrawIdx)*8);
IM_ASSERT(draw_list->_VtxCurrentIdx <= max_vtx_idx);
}
GImGui->IO.MetricsRenderVertices += draw_list->VtxBuffer.Size;
GImGui->IO.MetricsRenderIndices += draw_list->IdxBuffer.Size;
}