Method renderGraph

Source/Falcor/Utils/Timing/ProfilerUI.cpp:293–367

}

void ProfilerUI::renderGraph(const ImVec2& size, size_t highlightIndex, size_t& newHighlightIndex)
{
    ImVec2 mousePos = ImGui::GetMousePos();
    ImVec2 screenPos = ImGui::GetCursorScreenPos();
    mousePos.x -= screenPos.x;
    mousePos.y -= screenPos.y;

    float totalMaxGraphValue = 0.f;
    for (const auto& eventData : mEventData)
        totalMaxGraphValue += eventData.level == 0 ? eventData.maxGraphValue : 0.f;

    const float scaleY = size.y / totalMaxGraphValue;

    float x = 0.f;
    float levelY[128];
    std::optional<float> highlightValue;

    for (size_t k = 0; k < mHistoryLength; ++k)
    {
        size_t historyIndex = (mHistoryWrite + kHistoryCapacity - k - 1) % kHistoryCapacity;

        float totalValue = 0.f;
        for (const auto& eventData : mEventData)
        {
            totalValue += eventData.level == 0 ? eventData.graphHistory[historyIndex] : 0.f;
        }

        levelY[0] = size.y - totalValue * scaleY;
        float highlightY = 0.f;
        float highlightHeight = 0.f;

        for (size_t i = 0; i < mEventData.size(); ++i)
        {
            const auto& eventData = mEventData[i];
            float value = eventData.graphHistory[historyIndex];
            uint32_t level = eventData.level;

            float y = levelY[level];
            float height = value * scaleY;
            drawRectFilled(ImVec2(x, y), ImVec2(kGraphBarWidth, height), eventData.color);

            // Check if mouse is over this bar for tooltip value and highlighting in next frame.
            if (mousePos.x >= x && mousePos.x < x + kGraphBarWidth && mousePos.y >= y && mousePos.y < y + height)
            {
                newHighlightIndex = i;
                highlightValue = value / totalValue;
            }

            if (highlightIndex == i)
            {
                highlightY = y;
                highlightHeight = height;
            }

            levelY[level + 1] = levelY[level];
            levelY[level] += height;
        }