566f5b8d42
Server sends COMMAND_SCREEN_PREVIEW_REQ when user double-clicks an active (non-Locked/Inactive) host that advertises CLIENT_CAP_SCREEN_PREVIEW. Client BitBlts primary screen, encodes to JPEG via GDI+ and replies. The existing STATIC tooltip is replaced with a self-drawn CPreviewTipWnd showing the thumbnail above the host info text, with wide-character rendering so the popup also works on non-Chinese servers. - Quality tiers reuse QualityProfile pattern: PreviewProfile + 6 levels driven by GetTargetQualityLevel (FRP-aware), with 4K/ultrawide auto upscale on Ultra/High tiers up to min(screenWidth/4, 1280). - Client limits to 1 in-flight capture via atomic counter to defend against flood/DoS; Send2Server is already mutex-serialized. - Server validates responses by reqId only (single in-flight tip); 4s arrival timeout marks "preview unavailable" without blocking the text fallback path. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
// PreviewTipWnd.h
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// 双击在线主机时弹出的浮窗：上方 JPEG 缩略图，下方主机信息文本。
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// 无图片时显示"加载预览…"占位，供 OnListClick 即时弹窗、收到响应后再 SetImage 重画。
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#pragma once
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#include <afxwin.h>
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#include <memory>
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#include <vector>
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namespace Gdiplus { class Bitmap; }
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class CPreviewTipWnd : public CWnd
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{
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public:
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CPreviewTipWnd();
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virtual ~CPreviewTipWnd();
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// 创建浮窗。
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// anchor 屏幕坐标，浮窗左上角
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// text 下方显示的主机详情文本（宽字符，确保跨语言系统正确渲染）
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// imageReserveW 上方图像区域预留宽度（即将到来的预览最大宽度，仅作初始布局）
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// 为 0 表示不预留 — 与老 STATIC 路径行为一致（仅文本）
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BOOL Create(CWnd* pParent, CPoint anchor, const CStringW& text, int imageReserveW);
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// 收到 JPEG 后调用：解码并重画。线程安全前提是只在主 UI 线程调用。
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void SetImageFromJpeg(const BYTE* data, size_t bytes);
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// 标记预览不可用（请求超时 / 客户端报错）。
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void MarkPreviewUnavailable();
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WORD GetReqId() const { return m_reqId; }
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void SetReqId(WORD id) { m_reqId = id; }
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protected:
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afx_msg void OnPaint();
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afx_msg BOOL OnEraseBkgnd(CDC* pDC);
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DECLARE_MESSAGE_MAP()
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private:
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void RecalcLayoutAndResize();
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void DrawImageArea(CDC& dc, const CRect& rc);
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void DrawTextArea(CDC& dc, const CRect& rc);
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CStringW m_text;
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int m_imageReserveW = 0; // 预留图像宽度（图像未到达时占位）
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int m_imageReserveH = 0; // 预留图像高度（按 16:9）
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int m_imageDrawW = 0; // 实际图像绘制宽度
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int m_imageDrawH = 0; // 实际图像绘制高度
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int m_textW = 0;
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int m_textH = 0;
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bool m_hasImage = false;
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bool m_unavailable = false;
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std::unique_ptr<Gdiplus::Bitmap> m_image;
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CFont m_font;
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WORD m_reqId = 0;
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};
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