Method ErrorCheckNewFrameSanityChecks

include/imgui/imgui.cpp:10919–10979

}

static void ImGui::ErrorCheckNewFrameSanityChecks()
{
    ImGuiContext& g = *GImGui;

    // Check user IM_ASSERT macro
    // (IF YOU GET A WARNING OR COMPILE ERROR HERE: it means your assert macro is incorrectly defined!
    //  If your macro uses multiple statements, it NEEDS to be surrounded by a 'do { ... } while (0)' block.
    //  This is a common C/C++ idiom to allow multiple statements macros to be used in control flow blocks.)
    // #define IM_ASSERT(EXPR)   if (SomeCode(EXPR)) SomeMoreCode();                    // Wrong!
    // #define IM_ASSERT(EXPR)   do { if (SomeCode(EXPR)) SomeMoreCode(); } while (0)   // Correct!
    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
    // (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.IO.DeltaTime > 0.0f || g.FrameCount == 0)              && "Need a positive DeltaTime!");
    IM_ASSERT((g.FrameCount == 0 || g.FrameCountEnded == g.FrameCount)  && "Forgot to call Render() or EndFrame() at the end of the previous frame?");
    IM_ASSERT(g.IO.DisplaySize.x >= 0.0f && g.IO.DisplaySize.y >= 0.0f  && "Invalid DisplaySize value!");
    IM_ASSERT(g.Style.CurveTessellationTol > 0.0f                       && "Invalid style setting!");
    IM_ASSERT(g.Style.CircleTessellationMaxError > 0.0f                 && "Invalid style setting!");
    IM_ASSERT(g.Style.Alpha >= 0.0f && g.Style.Alpha <= 1.0f            && "Invalid style setting!"); // Allows us to avoid a few clamps in color computations
    IM_ASSERT(g.Style.WindowMinSize.x >= 1.0f && g.Style.WindowMinSize.y >= 1.0f && "Invalid style setting!");
    IM_ASSERT(g.Style.WindowBorderHoverPadding > 0.0f                   && "Invalid style setting!"); // Required otherwise cannot resize from borders.
    IM_ASSERT(g.Style.WindowMenuButtonPosition == ImGuiDir_None || g.Style.WindowMenuButtonPosition == ImGuiDir_Left || g.Style.WindowMenuButtonPosition == ImGuiDir_Right);
    IM_ASSERT(g.Style.ColorButtonPosition == ImGuiDir_Left || g.Style.ColorButtonPosition == ImGuiDir_Right);
    IM_ASSERT(g.Style.TreeLinesFlags == ImGuiTreeNodeFlags_DrawLinesNone || g.Style.TreeLinesFlags == ImGuiTreeNodeFlags_DrawLinesFull || g.Style.TreeLinesFlags == ImGuiTreeNodeFlags_DrawLinesToNodes);

    // Error handling: we do not accept 100% silent recovery! Please contact me if you feel this is getting in your way.
    if (g.IO.ConfigErrorRecovery)
        IM_ASSERT(g.IO.ConfigErrorRecoveryEnableAssert || g.IO.ConfigErrorRecoveryEnableDebugLog || g.IO.ConfigErrorRecoveryEnableTooltip || g.ErrorCallback != NULL);

#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
    if (g.IO.FontGlobalScale > 1.0f)
        IM_ASSERT(g.Style.FontScaleMain == 1.0f && "Since 1.92: use style.FontScaleMain instead of g.IO.FontGlobalScale!");

    // Remap legacy names
    if (g.IO.ConfigFlags & ImGuiConfigFlags_NavEnableSetMousePos)
    {
        g.IO.ConfigNavMoveSetMousePos = true;
        g.IO.ConfigFlags &= ~ImGuiConfigFlags_NavEnableSetMousePos;
    }
    if (g.IO.ConfigFlags & ImGuiConfigFlags_NavNoCaptureKeyboard)
    {
        g.IO.ConfigNavCaptureKeyboard = false;
        g.IO.ConfigFlags &= ~ImGuiConfigFlags_NavNoCaptureKeyboard;
    }

    // Remap legacy clipboard handlers (OBSOLETED in 1.91.1, August 2024)
    if (g.IO.GetClipboardTextFn != NULL && (g.PlatformIO.Platform_GetClipboardTextFn == NULL || g.PlatformIO.Platform_GetClipboardTextFn == Platform_GetClipboardTextFn_DefaultImpl))
        g.PlatformIO.Platform_GetClipboardTextFn = [](ImGuiContext* ctx) { return ctx->IO.GetClipboardTextFn(ctx->IO.ClipboardUserData); };
    if (g.IO.SetClipboardTextFn != NULL && (g.PlatformIO.Platform_SetClipboardTextFn == NULL || g.PlatformIO.Platform_SetClipboardTextFn == Platform_SetClipboardTextFn_DefaultImpl))