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Backends: GLFW: Accept glfwGetTime() not returning a monotonically increasing value. (#6491, #6189, #6114)

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ocornut 2023-06-12 11:58:17 +02:00
parent dec082ff97
commit 884e3fd21f
2 changed files with 7 additions and 0 deletions
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4
backends/imgui_impl_glfw.cpp
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@ -17,6 +17,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2023-06-12: Accept glfwGetTime() not returning a monotonically increasing value. This seems to happens on some Windows setup when peripherals disconnect, and is likely to also happen on browser + Emscripten. (#6491)
// 2023-04-04: Inputs: Added support for io.AddMouseSourceEvent() to discriminate ImGuiMouseSource_Mouse/ImGuiMouseSource_TouchScreen/ImGuiMouseSource_Pen on Windows ONLY, using a custom WndProc hook. (#2702)
// 2023-03-16: Inputs: Fixed key modifiers handling on secondary viewports (docking branch). Broken on 2023/01/04. (#6248, #6034)
// 2023-03-14: Emscripten: Avoid using glfwGetError() and glfwGetGamepadState() which are not correctly implemented in Emscripten emulation. (#6240)
@ -780,7 +781,10 @@ void ImGui_ImplGlfw_NewFrame()
io.DisplayFramebufferScale = ImVec2((float)display_w / (float)w, (float)display_h / (float)h);
// Setup time step
// (Accept glfwGetTime() not returning a monotonically increasing value. Seems to happens on disconnecting peripherals and probably on VMs and Emscripten, see #6491, #6189, #6114, #3644)
double current_time = glfwGetTime();
if (current_time <= bd->Time)
current_time = bd->Time + 0.00001f;
io.DeltaTime = bd->Time > 0.0 ? (float)(current_time - bd->Time) : (float)(1.0f / 60.0f);
bd->Time = current_time;

3
docs/CHANGELOG.txt
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@ -39,6 +39,9 @@ Other changes:
- Tables: Fixed a regression in 1.89.6 leading to the first column of tables with either
ScrollX or ScrollY flags from being impossible to resize. (#6503)
- Backends: OpenGL3: Fixed support for glBindSampler() backup/restore on ES3. (#6375, #6508) [@jsm174]
- Backends: GLFW: Accept glfwGetTime() not returning a monotonically increasing value.
This seems to happens on some Windows setup when peripherals disconnect, and is likely
to also happen on browser+Emscripten. Matches similar 1.89.4 fix in SDL backend. (#6491)
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