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Misc: Tolerate zero delta-time under Emscripten. (#6114, #3644)

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ocornut 2023-01-25 14:13:12 +01:00
parent fe0a24f38a
commit 07490618ae
2 changed files with 10 additions and 0 deletions
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3
docs/CHANGELOG.txt
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@ -51,6 +51,9 @@ All changes:
- PlotHistogram, PlotLines: Passing negative sizes honor alignment like other widgets. - PlotHistogram, PlotLines: Passing negative sizes honor alignment like other widgets.
- ImDrawList: Added missing early-out in AddPolyline() and AddConvexPolyFilled() when - ImDrawList: Added missing early-out in AddPolyline() and AddConvexPolyFilled() when
color alpha is zero. color alpha is zero.
- Misc: Tolerate zero delta-time under Emscripten as backends are imprecise in their
values for io.DeltaTime, and browser features such as "privacy.resistFingerprinting=true"
can exacerbate that. (#6114, #3644)
- Examples: Win32: Fixed examples using RegisterClassW() since 1.89 to also call - Examples: Win32: Fixed examples using RegisterClassW() since 1.89 to also call
DefWindowProcW() instead of DefWindowProc() so that title text are correctly converted DefWindowProcW() instead of DefWindowProc() so that title text are correctly converted
when application is compiled without /DUNICODE. (#5725, #5961, #5975) [@markreidvfx] when application is compiled without /DUNICODE. (#5725, #5961, #5975) [@markreidvfx]

7
imgui.cpp
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@ -8852,6 +8852,13 @@ static void ImGui::ErrorCheckNewFrameSanityChecks()
// #define IM_ASSERT(EXPR) do { if (SomeCode(EXPR)) SomeMoreCode(); } while (0) // Correct! // #define IM_ASSERT(EXPR) do { if (SomeCode(EXPR)) SomeMoreCode(); } while (0) // Correct!
if (true) IM_ASSERT(1); else IM_ASSERT(0); if (true) IM_ASSERT(1); else IM_ASSERT(0);
// Emscripten backends are often imprecise in their submission of DeltaTime. (#6114, #3644)
// Ideally the Emscripten app/backend should aim to fix or smooth this value and avoid feeding zero, but we tolerate it.
#ifdef __EMSCRIPTEN__
if (g.IO.DeltaTime <= 0.0f && g.FrameCount > 0)
g.IO.DeltaTime = 0.00001f;
#endif
// Check user data // Check user data
// (We pass an error message in the assert expression to make it visible to programmers who are not using a debugger, as most assert handlers display their argument) // (We pass an error message in the assert expression to make it visible to programmers who are not using a debugger, as most assert handlers display their argument)
IM_ASSERT(g.Initialized); IM_ASSERT(g.Initialized);