{"id":4600,"date":"2017-08-21T14:51:31","date_gmt":"2017-08-21T06:51:31","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=4600"},"modified":"2017-08-21T14:51:31","modified_gmt":"2017-08-21T06:51:31","slug":"fmx%e4%b8%8d%e6%98%af%e6%89%80%e6%9c%89%e7%9a%84%e9%ab%98%e8%b4%a8%e9%87%8f%e7%bb%98%e5%9b%be%e9%83%bd%e6%98%af%e6%88%91%e4%bb%ac%e6%83%b3%e8%a6%81%e7%9a%84%ef%bc%9a%e5%9c%a8-fmx-%e4%b8%8b%e4%bd%bf","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=4600","title":{"rendered":"[FMX]\u4e0d\u662f\u6240\u6709\u7684\u9ad8\u8d28\u91cf\u7ed8\u56fe\u90fd\u662f\u6211\u4eec\u60f3\u8981\u7684\uff1a\u5728 FMX \u4e0b\u4f7f\u7528 Canvas \u8fdb\u884c\u201c\u4f4e\u8d28\u91cf\u201d\u7ed8\u56fe"},"content":{"rendered":"<p>\u9c7c\uff0c\u6211\u6240\u6b32\u4e5f\uff0c\u718a\u638c\uff0c\u867d\u6211\u4e5f\u6b32\uff0c\u4f46\u6211\u4e70\u4e0d\u8d77\u4e5f\uff01FMX \u9ed8\u8ba4\u7684\u7ec4\u56fe\u6a21\u5f0f\u662f SystemDefault\uff0c\u5728 Windows \u4e0b\uff0c\u9ed8\u8ba4\u662f\u9ad8\u8d28\u91cf\u7ed8\u56fe\u3002\u5f53\u7136\uff0c\u9ad8\u8d28\u91cf\u8fd9\u4e2a\u8bcd\u610f\u5473\u7740\u5565\uff0c\u5927\u5bb6\u90fd\u6e05\u695a\uff0c\u4f7f\u7528 TCanvas \u7684 DrawLine \u7ed8\u5236\u4e00\u6761 1 \u50cf\u7d20\u7684\u6c34\u5e73\u76f4\u865a\u7ebf\uff0c\u6548\u679c\u5982\u4e0b\uff1a<\/p>\n<p><a href=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2017\/08\/hqline.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4601 alignleft\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2017\/08\/hqline.png\" alt=\"\" width=\"141\" height=\"47\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u600e\u4e48\u6837\uff0c\u611f\u89c9\u662f\u4e0d\u662f\u6709\u70b9\u8fa3\u773c\u775b\uff1f\u6211\u5b9e\u9645\u4e0a\u60f3\u8981\u7684\u662f\u8fd9\u79cd\uff1a<br \/>\n<a href=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2017\/08\/lqline.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4602 alignleft\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2017\/08\/lqline.png\" alt=\"\" width=\"77\" height=\"31\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u662f\u7684\uff0c\u9ad8\u8d28\u91cf\u7684\u7ed8\u56fe\u5f97\u51fa\u4e86\u6211\u4eec\u4e0d\u60f3\u8981\u7684\u7ed3\u679c\u3002<\/p>\n<p><span style=\"line-height: 1.5;\">TCanvas \u672c\u8eab\u5012\u662f\u6709\u4e00\u4e2a Quality \u5c5e\u6027\uff0c\u53ef\u60dc\u5b83\u662f\u53ea\u8bfb\u7684\uff01\uff01\uff01\uff01<\/span><\/p>\n<p><span style=\"line-height: 1.5;\">\u5982\u679c\u8bbe\u7f6e\u7a97\u4f53\u7684 Quality \u76f4\u63a5\u5c31\u662f<\/span> <span style=\"line-height: 1.5;\">Perfmance\uff0c\u5f53\u7136\u80fd\u8fbe\u5230\u6211\u4eec\u60f3\u8981\u7684\u6548\u679c\uff0c\u4f46\u4ee3\u4ef7\u5c31\u662f\u8fd9\u4e2a\u7a97\u4f53\u4e0a\u6240\u6709\u63a7\u4ef6\u7684\u7ed8\u56fe\u8d28\u91cf\u90fd\u53d8\u6210\u5dee\u4e86\u3002\u6240\u4ee5\uff0c\u901a\u8fc7\u5bfb\u5bfb\u89c5\u89c5\uff0c\u7ec8\u4e8e\u627e\u5230\u4e86\u4e00\u79cd\u6298\u4e2d\u7684\u529e\u6cd5\uff0c\u6211\u4eec\u770b Delphi \u4e2d TCanvasManager \u7684\u58f0\u660e\uff1a<\/span><\/p>\n<p>&nbsp;<\/p>\n<pre class=\"lang:delphi decode:true \">TCanvasManager = class sealed\r\n  private type\r\n    TCanvasClassRec = record\r\n      CanvasClass: TCanvasClass;\r\n      Default: Boolean;\r\n      PrinterCanvas: Boolean;\r\n    end;\r\n  strict private\r\n    class var FCanvasList: TList&lt;TCanvasClassRec&gt;;\r\n    class var FDefaultCanvasClass: TCanvasClass;\r\n    class var FDefaultPrinterCanvasClass: TCanvasClass;\r\n    class var FMeasureBitmap: TBitmap;\r\n    class var FEnableSoftwareCanvas: Boolean;\r\n  private\r\n    class function GetDefaultCanvas: TCanvasClass; static;\r\n    class function GetMeasureCanvas: TCanvas; static;\r\n    class function GetDefaultPrinterCanvas: TCanvasClass; static;\r\n  public\r\n    \/\/ Reserved for internal use only - do not call directly!\r\n    class procedure UnInitialize;\r\n    \/\/ Register a rendering Canvas class\r\n    class procedure RegisterCanvas(const CanvasClass: TCanvasClass; const ADefault: Boolean; const APrinterCanvas: Boolean);\r\n    \/\/ Return default Canvas\r\n    class property DefaultCanvas: TCanvasClass read GetDefaultCanvas;\r\n    \/\/ Return default Canvas\r\n    class property DefaultPrinterCanvas: TCanvasClass read GetDefaultPrinterCanvas;\r\n    \/\/ Return canvas instance used for text measuring for example\r\n    class property MeasureCanvas: TCanvas read GetMeasureCanvas;\r\n    \/\/ Creation helper\r\n    class function CreateFromWindow(const AParent: TWindowHandle; const AWidth, AHeight: Integer;\r\n      const AQuality: TCanvasQuality = TCanvasQuality.SystemDefault): TCanvas;\r\n    class function CreateFromBitmap(const ABitmap: TBitmap;\r\n      const AQuality: TCanvasQuality = TCanvasQuality.SystemDefault): TCanvas;\r\n    class function CreateFromPrinter(const APrinter: TAbstractPrinter): TCanvas;\r\n    class procedure RecreateFromPrinter(const Canvas: TCanvas; const APrinter: TAbstractPrinter);\r\n    class procedure EnableSoftwareCanvas(const Enable: Boolean);\r\n  end;<\/pre>\n<p>\u770b\u5230\u4e86\u5565\uff1f\u6709\u51e0\u4e2a\u597d\u4e1c\u897f\uff1a<\/p>\n<ul>\n<li>DefaultCanvas \u662f\u8fd4\u56de\u7cfb\u7edf\u4e2d\u9ed8\u8ba4\u7684\u753b\u5e03\u7684\u7c7b\u578b\u7684\uff0c\u901a\u8fc7\u5b83\u53ef\u4ee5\u521b\u5efa\u9ed8\u8ba4\u7c7b\u578b\u7684 TCanvas \u5b9e\u4f8b\u3002<\/li>\n<li>MeasureCanvas \u8fd9\u4e2a\u662f\u4e00\u4e2a\u865a\u62df\u7684\u753b\u5e03\uff0c\u7528\u6765\u8ba1\u7b97\u6587\u672c\u5927\u5c0f\u7684\uff0c\u5168\u5c40\u5171\u4eab\u3002<\/li>\n<li>CreateFromWindows \u53ef\u4ee5\u4ece\u4e00\u4e2a\u7a97\u53e3\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u753b\u5e03\u5bf9\u8c61\uff0c\u5b83\u662f\u53ef\u4ee5\u63a7\u5236\u8fd9\u4e2a\u753b\u5e03\u7684\u8d28\u91cf\uff0c\u4f46\u662fFMX\u63a7\u4ef6\uff0c\u5927\u90e8\u5206\u662f\u6ca1\u6709\u4e2a\u8fd9 TWindowHandle \u5b9e\u4f8b\u7684\uff08\u5f53\u7136\uff0c\u7a97\u4f53\u4f8b\u5916\uff09\uff0c\u5982\u679c\u4f7f\u7528\u5b83\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u7684\u753b\u5e03\uff0c\u5bf9\u5728\u7a97\u4f53\u4e0a\u76f4\u63a5\u7ed8\u5236\u70b9\u4f4e\u8d28\u91cf\u7684\u5185\u5bb9\uff0c\u5e94\u8be5\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002<\/li>\n<li>CreateFromBitmap \u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u5173\u8054\u5230\u6307\u5b9a\u4f4d\u56fe\u7684\u753b\u5e03\uff0c\u5b83\u4e5f\u6709 AQuality \u53c2\u6570\u6765\u63a7\u5236\u753b\u5e03\u7684\u7ed8\u56fe\u8d28\u91cf\uff0c\u8fd9\u7b80\u76f4\u5c31\u662f\u51b7\u5929\u6765\u4e86\u9001\u6e29\u6696\u7684\u3002<\/li>\n<li>\u592a\u6fc0\u52a8\u4e86\uff0c\u540e\u9762\u7684\u4e24\u4e2a\u5927\u5bb6\u81ea\u5df1\u987e\u540d\u601d\u4e49\uff0c\u81ea\u5df1\u770b\u5427\uff0c\u53cd\u6b63\u5b98\u65b9\u662f\u6ca1\u6709\u5e2e\u52a9\u7684:)<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u4e0a\u9762\u7684\u8fc7\u7a0b\uff0c\u6211\u4eec\u5c31\u77e5\u9053\u6211\u4eec\u8be5\u600e\u4e48\u505a\u4e86\uff1a<\/p>\n<p>1\u3001\u521b\u5efa\u4e00\u4e2a\u7f13\u5b58\u7684\u4f4d\u56fe\uff0c\u7136\u540e\u8c03\u7528 TCanvasManager.CreateFromBitmap \u6765\u521b\u5efa\u4e00\u4e2a\u4f4e\u8d28\u91cf\u7684\u753b\u5e03\uff0c\u7136\u540e\u5728\u4e0a\u9762\u7ed8\u56fe\uff0c\u5177\u4f53\u7684\u7ed8\u56fe\u4ee3\u7801\uff0c\u6b64\u5904\u7701\u7565500\u5b57\u3002<\/p>\n<p>2\u3001\u4f7f\u7528Canvas.DrawBitmap\uff0c\u5c06\u7f13\u5b58\u7684\u4f4d\u56fe\u7ed8\u5236\u5230\u6307\u5b9a\u7684\u753b\u5e03\u6307\u5b9a\u4f4d\u7f6e\uff0c\u7531\u4e8e\u6211\u4eec\u4e0d\u8981\u9ad8\u8d28\u91cf\u7ed8\u56fe\uff0c\u6240\u4ee5 AHighSpeed \u53c2\u6570\uff0c\u8bf7\u9009\u62e9 true\uff08\u9ed8\u8ba4\u662ffalse\uff09\u3002<\/p>\n<p>3\u3001\u91ca\u653e\u8be5\u91ca\u653e\u7684\u5bf9\u8c61\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u5e08\u5085\u9886\u8fdb\u95e8\uff0c\u4fee\u884c\u9760\u5404\u4eba\uff0c\u770b\u770b\u6700\u7ec8\u7684\u6548\u679c\u5427\uff08\u540c\u65f6\u7ed8\u5236\u4e86\u4e24\u6761\u540c\u6837\u53c2\u6570\u7684\u7ebf\uff0c\u4e00\u6761\u662f\u4f4e\u8d28\u91cf\uff0c\u4e00\u6761\u662f\u9ad8\u8d28\u91cf\uff0cWindows \u5e73\u53f0\uff09\uff1a<\/p>\n<p style=\"text-align: left;\"><a href=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2017\/08\/multiquality.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4603 alignleft\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2017\/08\/multiquality.png\" alt=\"\" width=\"64\" height=\"27\" \/><\/a><\/p>\n<p style=\"text-align: left;\">\n","protected":false},"excerpt":{"rendered":"<p>\u9c7c\uff0c\u6211\u6240\u6b32\u4e5f\uff0c\u718a\u638c\uff0c\u867d\u6211\u4e5f\u6b32\uff0c\u4f46\u6211\u4e70\u4e0d\u8d77 [&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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