{"id":4541,"date":"2017-04-12T21:57:10","date_gmt":"2017-04-12T13:57:10","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=4541"},"modified":"2017-04-12T21:57:10","modified_gmt":"2017-04-12T13:57:10","slug":"fmx%e5%a2%9e%e5%bc%ba%e7%94%bb%e5%b8%83%e7%9a%84-drawbitmap-%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=4541","title":{"rendered":"[FMX]\u589e\u5f3a\u753b\u5e03\u7684 DrawBitmap \u51fd\u6570"},"content":{"rendered":"<p>\u4e0d\u591a\u8bf4\u8bdd\uff0c\u76f4\u63a5\u4e0a\u6e90\u7801\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">type\r\n  TFMXCanvasHelper = class helper for TCanvas\r\n  public\r\n    procedure StretchDraw(R: TRectF; ABitmap: TBitmap;\r\n      ADoFit, AHighSpeed: Boolean);\r\n  end;\r\n{ TFMXCanvasHelper }\r\n\r\nprocedure TFMXCanvasHelper.StretchDraw(R: TRectF; ABitmap: TBitmap;\r\n  ADoFit, AHighSpeed: Boolean);\r\nvar\r\n  SR: TRectF;\r\nbegin\r\n  SR := RectF(0, 0, ABitmap.Width, ABitmap.Height);\r\n  if ADoFit then\r\n    R := SR.FitInto(R);\r\n  DrawBitmap(ABitmap, SR, R, 1, AHighSpeed);\r\nend;<\/pre>\n<p>\u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li>R \uff1a\u7ed8\u5236\u76ee\u6807\u533a\u57df<\/li>\n<li>ABitmap\uff1a\u8981\u7ed8\u5236\u7684\u4f4d\u56fe\u5185\u5bb9<\/li>\n<li>ADoFit\uff1a\u662f\u5426\u6309\u6bd4\u4f8b\u81ea\u9002\u5e94\u76ee\u6807\u533a\u57df\u5927\u5c0f<\/li>\n<li>AHighSpeed\uff1a\u662f\u5426\u9ad8\u901f\u7ed8\u56fe\uff0c\u5982\u679c\u4f60\u662f\u8981\u7ed8\u5236\u8fb9\u7f18\u6e05\u6670\u7684\u4f4d\u56fe\uff0c\u5982\u4e8c\u7ef4\u7801\uff0c\u90a3\u5c31\u8981\u8bbe\u7f6e\u4e3a true\uff0c\u5426\u5219\u8bbe\u7f6e\u4e3a false<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0d\u591a\u8bf4\u8bdd\uff0c\u76f4\u63a5\u4e0a\u6e90\u7801\uff1a type TFM [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","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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