{"id":5135,"date":"2019-10-25T14:11:07","date_gmt":"2019-10-25T06:11:07","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=5135"},"modified":"2019-10-25T14:12:54","modified_gmt":"2019-10-25T06:12:54","slug":"fmx%e6%94%be%e5%a4%a7%e4%ba%8c%e7%bb%b4%e7%a0%81%e6%98%be%e7%a4%ba","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=5135","title":{"rendered":"[FMX]\u653e\u5927\u4e8c\u7ef4\u7801\u663e\u793a"},"content":{"rendered":"\n<p>\u5728\u4ee5\u524d\u7684\u6587\u7ae0\u4e2d\uff0c\u6211\u4ecb\u7ecd\u8fc7\u5982\u4f55<a href=\"https:\/\/blog.qdac.cc\/?p=3384\">\u5728 FMX \u4e2d\u7ed8\u5236\u4e8c\u7ef4\u7801<\/a>\uff0c\u4f46\u6ca1\u6709\u7ed9\u51fa\u653e\u5927\u663e\u793a\u7684\u4ee3\u7801\uff0c\u8fd9\u91cc\u7ed9\u51fa\u4e0b\uff0c\u65b9\u4fbf\u5927\u5bb6\u4f7f\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>function ScaleQRBitmap(AQRBitmap: TBitmap; const ASize: Integer): TBitmap;overload;\nvar\n  sr, dr: TRectF;\nbegin\n  Result := TBitmap.Create;\n  sr.Left := 0;\n  sr.Top := 0;\n  sr.Right := AQRBitmap.Width;\n  sr.Bottom := AQRBitmap.Height;\n  dr.Left := 0;\n  dr.Top := 0;\n  dr.Right := ASize;\n  dr.Height := ASize;\n  Result.SetSize(ASize, ASize);\n  Result.Canvas.BeginScene();\n  Result.Canvas.Clear(TAlphaColors.Null);\n  Result.Canvas.DrawBitmap(AQRBitmap, sr, dr, 1, True);\n  Result.Canvas.EndScene;\nend;\n\nfunction ScaleQRBitmap(const ASize: Integer; const AText: String): TBitmap;overload;\nvar\n  ATemp: TBitmap;\n  sr, dr: TRectF;\nbegin\n  ATemp := GenerateQRCode(AText);\n  try\n    Result:=ScaleQRBitmap(ATemp,ASize);\n  finally\n    FreeAndNil(ATemp);\n  end;\nend;<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u76f4\u63a5\u8c03\u7528 ScaleQRBitmap \u5c31\u53ef\u4ee5\u4e86\u3002\u6ce8\u610f ASize \u7684\u8ba1\u7b97\u5e94\u8003\u8651\u8fdb\u5165 SceneScale \u7684\u503c\u3002\u53c2\u8003\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>procedure TForm1.SpeedButton1Click(Sender: TObject);\nvar\n  ABitmap: TBitmap;\nbegin\n  ABitmap := ScaleQRBitmap(Trunc(Image1.Width*(Self as IScene).GetSceneScale ), 'http:\/\/www.baidu.com');\n  try\n    Image1.Bitmap.Assign(ABitmap);\n  finally\n    FreeAndNil(ABitmap);\n  end;\nend;<\/code><\/pre>\n\n\n\n<p>\u7a0b\u5e8f\u8fd0\u884c\u6548\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"563\" height=\"368\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2019\/10\/qrcode.jpg\" alt=\"\" class=\"wp-image-5137\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4ee5\u524d\u7684\u6587\u7ae0\u4e2d\uff0c\u6211\u4ecb\u7ecd\u8fc7\u5982\u4f55\u5728 FMX  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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