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ImDrawList: Fixed VtxOffset change leading to unnecessary leading empty ImDrawCmd in certain cases.

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This commit is contained in:
ocornut
2020-06-10 19:16:06 +02:00
parent 16da8e6da6
commit 64d8d302fb
2 changed files with 17 additions and 2 deletions
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1
imgui.h
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@@ -2075,6 +2075,7 @@ struct ImDrawList
IMGUI_API void _PopUnusedDrawCmd();
IMGUI_API void _OnChangedClipRect();
IMGUI_API void _OnChangedTextureID();
IMGUI_API void _OnChangedVtxOffset();
};
// All draw data to render a Dear ImGui frame

18
imgui_draw.cpp
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@@ -514,6 +514,21 @@ void ImDrawList::_OnChangedTextureID()
curr_cmd->TextureId = _CmdHeader.TextureId;
}
void ImDrawList::_OnChangedVtxOffset()
{
// We don't need to compare curr_cmd->VtxOffset != _CmdHeader.VtxOffset because we know it'll be different at the time we call this.
_VtxCurrentIdx = 0;
ImDrawCmd* curr_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];
IM_ASSERT(curr_cmd->VtxOffset != _CmdHeader.VtxOffset);
if (curr_cmd->ElemCount != 0)
{
AddDrawCmd();
return;
}
IM_ASSERT(curr_cmd->UserCallback == NULL);
curr_cmd->VtxOffset = _CmdHeader.VtxOffset;
}
// Render-level scissoring. This is passed down to your render function but not used for CPU-side coarse clipping. Prefer using higher-level ImGui::PushClipRect() to affect logic (hit-testing and widget culling)
void ImDrawList::PushClipRect(ImVec2 cr_min, ImVec2 cr_max, bool intersect_with_current_clip_rect)
{
@@ -570,8 +585,7 @@ void ImDrawList::PrimReserve(int idx_count, int vtx_count)
if (sizeof(ImDrawIdx) == 2 && (_VtxCurrentIdx + vtx_count >= (1 << 16)) && (Flags & ImDrawListFlags_AllowVtxOffset))
{
_CmdHeader.VtxOffset = VtxBuffer.Size;
_VtxCurrentIdx = 0;
AddDrawCmd();
_OnChangedVtxOffset();
}
ImDrawCmd* draw_cmd = &CmdBuffer.Data[CmdBuffer.Size - 1];