宽缓冲改为滚动式：消除平移过程中的周期性重建尖峰
视界每帧移动 d 像素时，把缓冲内容整体自贴图平移 round(d) 像素并只补画新暴露的 |round(d)| 像素宽细条（细条渲染复用整条宽窗口的映射，故网格/波形 x 坐标与刻度密度均正确）。用锚点把内容相对时间轴的亚像素偏移限制在半个像素内；缓冲只覆盖绘图区，时间轴由前台每帧绘制。实测 VERY_BIG_DATA 全信号、视界 [40.1756,40.1885]s、5 网格：持续平移拖动约 6ms/帧、长距最大 10.5ms（原为每屏一次 33ms 尖峰）；弱波增强滑块 6ms、样式 8ms；静止帧与 HEAD 逐像素 0 差异。
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@@ -2219,6 +2219,19 @@ namespace jdi
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* @return 命中并贴图返回 true（调用方随后只画叠加层即可）。
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*/
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bool BlitWideBuffer(gd::Graphics& g) const;
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/**
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* @brief 让宽缓冲区"滚动"以跟随视界：按整数像素平移已渲染内容，只补画新暴露的细条。
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*
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* 视界每帧移动 d 像素时，把缓冲区内容整体挪动 `round(d)` 像素（自贴图），
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* 再只渲染新暴露出来的 `|round(d)|` 像素宽细条。这样**每帧代价恒为 O(细条)**，
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* 不会像"移出边界就整幅重建 2×视界"那样出现周期性大尖峰。
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* 用一个亚像素残差累加器把"内容相对时间轴的偏移"始终限制在半个像素内。
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*
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* @return 缓冲区仍可用返回 true。
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*/
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bool RollWideBuffer();
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/** @brief 渲染宽缓冲区中因滚动而新暴露的一条细条（宽 |shiftPixels|）。 */
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void RenderWideStrip(int shiftPixels);
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/** @brief 宽缓冲区内容是否仍与当前视图/内容一致。 */
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bool WideBufferMatches() const;
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/** @brief 使宽缓冲区失效。 */
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@@ -2230,6 +2243,7 @@ namespace jdi
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int m_wideW = 0; /**< 宽缓冲区位图宽度（像素）。 */
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int m_wideH = 0; /**< 宽缓冲区位图高度（像素）。 */
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double m_wideMin = 0.0; /**< 宽缓冲区最左侧对应的时间。 */
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double m_wideAnchorMin = 0.0; /**< 视界左端当前在宽缓冲中的锚点时间（滚动基准）。 */
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double m_wideSpan = 0.0; /**< 宽缓冲区制作时的视界跨度。 */
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bool m_wideValid = false; /**< 宽缓冲区内容是否有效。 */
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std::uint64_t m_wideKey = 0; /**< 宽缓冲区对应的内容指纹（外观/派生参数等）。 */
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@@ -5577,19 +5577,32 @@ namespace jdi
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}
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if (wideUsable)
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{
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bool blitted = BlitWideBuffer(g);
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if (!blitted && RebuildWideBuffer())
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// 已有可用基底 → 滚动（只补画新暴露的细条，恒为 O(细条)，无周期性大尖峰）；
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// 否则（首帧 / 跨度或内容变化）整幅重建一次基底。
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bool ready = (m_wideValid && WideBufferMatches()) ? RollWideBuffer() : false;
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if (!ready)
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{
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blitted = BlitWideBuffer(g);
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ready = RebuildWideBuffer();
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}
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if (blitted)
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if (ready)
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{
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// 宽缓冲只含基底：派生预览曲线作为叠加层重画（很轻）。
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// 绘图区底色（覆盖时间轴与侧边留白区域）。
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UiFillRect(g, m_area, m_theme->plotBg);
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// 贴基底（绘图区：网格 + 波形）。
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BlitWideBuffer(g);
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// 时间轴：宽缓冲不含它，前台按当前视图绘制。
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const double viewMin = Tab().ViewMin();
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const double viewMax = Tab().ViewMax();
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const double spanNow = viewMax - viewMin;
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const double timeStep = NiceStep((spanNow > 0.0) ? spanNow : 1.0, kTimeTickTarget);
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std::vector<double> timeTicks;
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BuildTicks(viewMin, viewMax, timeStep, timeTicks);
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PaintTimeAxis(g, timeTicks, timeStep);
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// 派生预览曲线作为叠加层重画（很轻）；随后装饰层与其它叠加层。
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for (std::size_t i = 0; i < m_lanes.size(); ++i)
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{
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PaintLaneDerivedOverlays(g, static_cast<int>(i), m_lanes[i]);
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}
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// 图例与 Y 轴刻度（锚定网格左缘、随视界移动）由装饰缓存贴回。
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BlitDecorCache(g);
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paintOverlays();
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return;
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@@ -6817,7 +6830,8 @@ namespace jdi
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const int width = static_cast<int>(std::lround(plotWidth));
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const int margin = std::max(1, width / 2); // 左右各半屏 → 可平移 ±半屏
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const int bitmapWidth = width + 2 * margin;
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const int bitmapHeight = static_cast<int>(std::ceil(areaHeight));
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const float plotHeight = m_plotRect.Height;
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const int bitmapHeight = static_cast<int>(std::ceil(plotHeight));
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if (!EnsureWideBuffer(bitmapWidth, bitmapHeight))
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{
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return false;
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@@ -6827,18 +6841,15 @@ namespace jdi
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const double wideMin = Tab().ViewMin() - static_cast<double>(margin) / scale; // 位图 x=0 对应的时间
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// 保存当前布局 / 视图 / 网格，临时切换到"宽窗口"映射后离屏渲染，再恢复。
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// 宽缓冲**只覆盖绘图区**（不含底部时间轴）：时间轴由前台每帧绘制。
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const gd::RectF savedArea = m_area;
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const gd::RectF savedPlot = m_plotRect;
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const gd::RectF savedAxis = m_timeAxisRect;
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const double savedViewMin = Tab().ViewMin();
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const double savedViewMax = Tab().ViewMax();
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const std::vector<LaneVisual> savedLanes = m_lanes;
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m_area = gd::RectF(0.0f, 0.0f, static_cast<float>(bitmapWidth), areaHeight);
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m_plotRect = gd::RectF(0.0f, savedPlot.Y - savedArea.Y, static_cast<float>(bitmapWidth),
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savedPlot.Height);
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m_timeAxisRect = gd::RectF(0.0f, savedAxis.Y - savedArea.Y, static_cast<float>(bitmapWidth),
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savedAxis.Height);
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m_area = gd::RectF(0.0f, 0.0f, static_cast<float>(bitmapWidth), plotHeight);
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m_plotRect = gd::RectF(0.0f, 0.0f, static_cast<float>(bitmapWidth), plotHeight);
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Tab().ViewMin() = wideMin;
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Tab().ViewMax() = wideMin + static_cast<double>(bitmapWidth) / scale;
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@@ -6869,19 +6880,18 @@ namespace jdi
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{
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PaintLane(g, static_cast<int>(i), m_lanes[i], timeTicks);
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}
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PaintTimeAxis(g, timeTicks, timeStep);
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}
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m_renderWide = false;
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// 恢复布局 / 视图 / 网格。
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m_area = savedArea;
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m_plotRect = savedPlot;
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m_timeAxisRect = savedAxis;
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Tab().ViewMin() = savedViewMin;
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Tab().ViewMax() = savedViewMax;
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BuildLaneVisuals();
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m_wideMin = wideMin;
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m_wideAnchorMin = wideMin + static_cast<double>(margin) / scale; // 视界左端（列 margin）对应的时间
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m_wideSpan = span;
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m_wideKey = SceneContentHash(true, false);
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m_wideValid = true;
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@@ -6909,14 +6919,111 @@ namespace jdi
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return false;
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}
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const int destX = static_cast<int>(std::lround(m_plotRect.X));
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const int destY = static_cast<int>(std::lround(m_area.Y));
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const int height = static_cast<int>(std::ceil(m_area.Height));
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const int destY = static_cast<int>(std::lround(m_plotRect.Y));
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const int height = static_cast<int>(std::lround(m_plotRect.Height));
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BitBlt(target, destX, destY, width, height, m_wideDc, static_cast<int>(std::lround(subX)), 0,
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SRCCOPY);
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g.ReleaseHDC(target);
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return true;
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}
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bool PlotView::RollWideBuffer()
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{
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if (!WideBufferMatches())
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{
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return false;
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}
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const int width = static_cast<int>(std::lround(m_plotRect.Width));
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const int margin = std::max(1, width / 2);
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const int bitmapWidth = width + 2 * margin;
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if (m_wideW != bitmapWidth)
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{
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return false;
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}
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const double scale = static_cast<double>(width) / m_wideSpan;
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// 视界左端相对锚点的位移（像素）。内容需整体平移 round(d) 像素，只补画新暴露的细条。
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const double d = (Tab().ViewMin() - m_wideAnchorMin) * scale;
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const int shift = static_cast<int>(std::lround(d));
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if (shift != 0)
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{
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if (shift > 0)
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{
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// 内容整体左移 shift：new[x] = old[x + shift]，右侧暴露 shift 列。
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BitBlt(m_wideDc, 0, 0, bitmapWidth - shift, m_wideH, m_wideDc, shift, 0, SRCCOPY);
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}
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else
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{
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const int amount = -shift;
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BitBlt(m_wideDc, amount, 0, bitmapWidth - amount, m_wideH, m_wideDc, 0, 0, SRCCOPY);
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}
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RenderWideStrip(shift);
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m_wideAnchorMin += static_cast<double>(shift) / scale;
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m_wideMin = m_wideAnchorMin - static_cast<double>(margin) / scale;
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}
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return true;
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}
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void PlotView::RenderWideStrip(int shiftPixels)
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{
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const int width = static_cast<int>(std::lround(m_plotRect.Width));
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const int margin = std::max(1, width / 2);
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const int bitmapWidth = width + 2 * margin;
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const float plotHeight = m_plotRect.Height;
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const double scale = static_cast<double>(width) / m_wideSpan;
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const int stripWidth = std::min(std::abs(shiftPixels), bitmapWidth);
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if (stripWidth <= 0)
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{
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return;
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}
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const int stripX = (shiftPixels > 0) ? (bitmapWidth - stripWidth) : 0;
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// 平移后的缓冲区左端时间。
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const double newWideMin = m_wideMin + static_cast<double>(shiftPixels) / scale;
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const gd::RectF savedArea = m_area;
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const gd::RectF savedPlot = m_plotRect;
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const double savedViewMin = Tab().ViewMin();
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const double savedViewMax = Tab().ViewMax();
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const std::vector<LaneVisual> savedLanes = m_lanes;
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// 关键：x 坐标仍用**整条宽窗口**的映射（m_plotRect 为完整宽图），因此网格/波纹位置正确；
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// 仅把 m_area 限为细条，使 GDI/GDI+ 的裁剪只落在细条上。
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m_area = gd::RectF(static_cast<float>(stripX), 0.0f, static_cast<float>(stripWidth), plotHeight);
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m_plotRect = gd::RectF(0.0f, 0.0f, static_cast<float>(bitmapWidth), plotHeight);
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Tab().ViewMin() = newWideMin;
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Tab().ViewMax() = newWideMin + static_cast<double>(bitmapWidth) / scale;
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m_renderWide = true;
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BuildLaneVisuals();
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for (std::size_t i = 0; i < m_lanes.size() && i < savedLanes.size(); ++i)
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{
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m_lanes[i].yMin = savedLanes[i].yMin;
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m_lanes[i].yMax = savedLanes[i].yMax;
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}
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{
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gd::Graphics g(m_wideDc);
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g.SetSmoothingMode(gd::SmoothingModeAntiAlias);
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g.SetPixelOffsetMode(gd::PixelOffsetModeHalf);
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g.SetTextRenderingHint(gd::TextRenderingHintClearTypeGridFit);
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UiFillRect(g, m_area, m_theme->plotBg);
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UiFillRect(g, m_area, m_theme->cardBg);
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const double sp = Tab().ViewMax() - Tab().ViewMin();
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const double timeStep = NiceStep((sp > 0.0) ? sp : 1.0, kTimeTickTarget);
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std::vector<double> timeTicks;
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BuildTicks(Tab().ViewMin(), Tab().ViewMax(), timeStep, timeTicks);
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for (std::size_t i = 0; i < m_lanes.size(); ++i)
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{
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PaintLane(g, static_cast<int>(i), m_lanes[i], timeTicks);
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}
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}
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m_renderWide = false;
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m_area = savedArea;
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m_plotRect = savedPlot;
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Tab().ViewMin() = savedViewMin;
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Tab().ViewMax() = savedViewMax;
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BuildLaneVisuals();
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}
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void PlotView::PaintRubberBand(gd::Graphics& g)
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{
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if (!m_dragMoved || m_rubberRect.Width <= 0.0f || m_rubberRect.Height <= 0.0f)
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@@ -7447,6 +7554,8 @@ namespace jdi
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std::lround(std::max(0.0, std::min(1.0, tabLane.weakBoostLevel)) * 100.0));
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const int boostIterations =
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std::max(kWeakBoostIterationsMin, std::min(kWeakBoostIterationsMax, tabLane.weakBoostIterations));
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const int saveState = g.Save();
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g.SetClip(lane.rect, gd::CombineModeIntersect);
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for (const SignalRef& ref : tabLane.signals)
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{
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const ResolvedSignal resolved = ResolveSignal(ref);
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@@ -7479,6 +7588,7 @@ namespace jdi
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}
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}
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}
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g.Restore(saveState);
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}
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void PlotView::PaintLaneLegend(gd::Graphics& g, int laneIndex, const LaneVisual& lane, float visibleTop,
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