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Allow windows with only a callback only to be functional + minor cleanup (#524)

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This commit is contained in:
ocornut 2016-02-14 10:33:56 +01:00
parent 5b7a0b1b40
commit 20ba769644
1 changed files with 18 additions and 17 deletions
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17
imgui.cpp
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@ -2286,26 +2286,27 @@ static void AddWindowToSortedBuffer(ImVector<ImGuiWindow*>& out_sorted_windows,
static void AddDrawListToRenderList(ImVector<ImDrawList*>& out_render_list, ImDrawList* draw_list)
{
if (!draw_list->CmdBuffer.empty() && !draw_list->VtxBuffer.empty())
{
if (draw_list->CmdBuffer.empty())
return;
// Remove trailing command if unused
ImDrawCmd& last_cmd = draw_list->CmdBuffer.back();
if (last_cmd.ElemCount == 0 && last_cmd.UserCallback == NULL)
{
draw_list->CmdBuffer.pop_back();
out_render_list.push_back(draw_list);
if (draw_list->CmdBuffer.empty())
return;
}
// 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 by calling BeginChild()/EndChild() to put your draw commands in multiple draw lists, B) #define ImDrawIdx to a 'unsigned int' in imconfig.h and render accordingly.
const unsigned long long int max_vtx_idx = (unsigned long long int)1L << (sizeof(ImDrawIdx)*8);
(void)max_vtx_idx;
IM_ASSERT((int)draw_list->_VtxCurrentIdx == draw_list->VtxBuffer.Size); // Sanity check. Bug or mismatch between PrimReserve() calls and incrementing _VtxCurrentIdx, _VtxWritePtr etc.
IM_ASSERT((unsigned long long int)draw_list->_VtxCurrentIdx <= max_vtx_idx); // Too many vertices in same ImDrawList. See comment above.
IM_ASSERT((unsigned long long int)draw_list->_VtxCurrentIdx <= ((unsigned long long int)1L << (sizeof(ImDrawIdx)*8))); // Too many vertices in same ImDrawList. See comment above.
out_render_list.push_back(draw_list);
GImGui->IO.MetricsRenderVertices += draw_list->VtxBuffer.Size;
GImGui->IO.MetricsRenderIndices += draw_list->IdxBuffer.Size;
}
}
static void AddWindowToRenderList(ImVector<ImDrawList*>& out_render_list, ImGuiWindow* window)
{