[implot] Add new port

[RT2Code]

https://github.com/epezent/implot

Requires #11919

[LilyWangL]

Thanks for your PR. Now this port build failed with this error:
buildtrees\implot\src\v0.3-d0514ebfd6\implot.cpp(63): fatal error C1083: Cannot open include file: 'imgui_internal.h': No such file or directory
Could you please continue to fix this PR?

[RT2Code]

It's because this library requires Imgui internal header to be publicly available, which I did with #11919.

This port should build just fine when #11919 will be merged.

[RT2Code]

Now that #11919 is merged, can you run the tests again? It should build now. :)

[LilyWangL]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[LilyWangL]

@RT222 Now implot build failed on CI with the following error:

implot.cpp.obj : error LNK2019: unresolved external symbol "struct ImGuiIO & __cdecl ImGui::GetIO(void)" (?GetIO@ImGui@@YAAAUImGuiIO@@XZ) referenced in function "bool __cdecl ImPlot::BeginPlot(char const *,char const *,char const *,struct ImVec2 const &,int,int,int,int,int)" (?BeginPlot@ImPlot@@YA_NPBD00ABUImVec2@@HHHHH@Z)
implot_demo.cpp.obj : error LNK2001: unresolved external symbol "struct ImGuiIO & __cdecl ImGui::GetIO(void)" (?GetIO@ImGui@@YAAAUImGuiIO@@XZ)
implot.cpp.obj : error LNK2019: unresolved external symbol "struct ImGuiStyle & __cdecl ImGui::GetStyle(void)" (?GetStyle@ImGui@@YAAAUImGuiStyle@@XZ) referenced in function "void __cdecl ImPlot::UpdateAxisColor(int,struct ImPlot::ImPlotAxisColor *)" (?UpdateAxisColor@ImPlot@@YAXHPAUImPlotAxisColor@1@@Z)
implot_demo.cpp.obj : error LNK2001: unresolved external symbol "struct ImGuiStyle & __cdecl ImGui::GetStyle(void)" (?GetStyle@ImGui@@YAAAUImGuiStyle@@XZ)
implot.cpp.obj : error LNK2019: unresolved external symbol "bool __cdecl ImGui::BeginChild(char const *,struct ImVec2 const &,bool,int)" (?BeginChild@ImGui@@YA_NPBDABUImVec2@@_NH@Z) referenced in function "bool __cdecl ImPlot::BeginPlot(char const *,char const *,char const *,struct ImVec2 const &,int,int,int,int,int)" (?BeginPlot@ImPlot@@YA_NPBD00ABUImVec2@@HHHHH@Z)
implot.cpp.obj : error LNK2019: unresolved external symbol "void __cdecl ImGui::EndChild(void)" (?EndChild@ImGui@@YAXXZ) referenced in function "public: void __thiscall ImPlot::ImPlotContext::Reset(void)" (?Reset@ImPlotContext@ImPlot@@QAEXXZ)
implot.cpp.obj : error LNK2019: unresolved external symbol "struct ImDrawList * __cdecl ImGui::GetWindowDrawList(void)" (?GetWindowDrawList@ImGui@@YAPAUImDrawList@@XZ) referenced in function "void __cdecl ImPlot::PlotText(char const *,double,double,bool,struct ImVec2 const &)" (?PlotText@ImPlot@@YAXPBDNN_NABUImVec2@@@Z)
implot_demo.cpp.obj : error LNK2001: unresolved external symbol "struct ImDrawList * __cdecl ImGui::GetWindowDrawList(void)" (?GetWindowDrawList@ImGui@@YAPAUImDrawList@@XZ)

Could you please continue to fix this PR?

[RT2Code]

Sorry about that, it should be fixed now.

[LilyWangL]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[LilyWangL]

Hi, @RT222 Now implot build failed on Linux with the following error:

buildtrees/implot/src/v0.3-d0514ebfd6/implot.h:26:10: fatal error: imgui.h: No such file or directory
 #include "imgui.h"
          ^~~~~~~~~
compilation terminated.

[RT2Code]

It should now build on Linux as soon as #12155 is merged.

[RT2Code]

#12155 have been merged, can you please run the tests again? It should build everywhere at last. :)

[LilyWangL]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ras0219-msft]

LGTM, thanks for the PR!