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ImDrawList: Additional comments and extracted bits into ImDrawList::PopUnusedDrawCmd()

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This commit is contained in:
ocornut
2020-06-08 18:21:10 +02:00
parent a6bb047bab
commit 117d57df5b
4 changed files with 22 additions and 12 deletions
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12
imgui.cpp
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@ -4077,18 +4077,12 @@ static void AddWindowToSortBuffer(ImVector<ImGuiWindow*>* out_sorted_windows, Im
static void AddDrawListToDrawData(ImVector<ImDrawList*>* out_list, ImDrawList* draw_list)
{
// Remove trailing command if unused.
// Technically we could return directly instead of popping, but this make things looks neat in Metrics window as well.
draw_list->PopUnusedDrawCmd();
if (draw_list->CmdBuffer.Size == 0)
return;
// Remove trailing command if unused
ImDrawCmd* curr_cmd = &draw_list->CmdBuffer.back();
if (curr_cmd->ElemCount == 0 && curr_cmd->UserCallback == NULL)
{
draw_list->CmdBuffer.pop_back();
if (draw_list->CmdBuffer.Size == 0)
return;
}
// Draw list sanity check. Detect mismatch between PrimReserve() calls and incrementing _VtxCurrentIdx, _VtxWritePtr etc.
// May trigger for you if you are using PrimXXX functions incorrectly.
IM_ASSERT(draw_list->VtxBuffer.Size == 0 || draw_list->_VtxWritePtr == draw_list->VtxBuffer.Data + draw_list->VtxBuffer.Size);