{"id":19477,"date":"2011-12-20T18:16:56","date_gmt":"2011-12-20T10:16:56","guid":{"rendered":"https:\/\/www.deepin.org\/?p=306"},"modified":"2011-12-20T18:16:56","modified_gmt":"2011-12-20T10:16:56","slug":"cairo-graph-for-python-2-cairo-concept","status":"publish","type":"post","link":"https:\/\/www.deepin.org.cn\/zh\/cairo-graph-for-python-2-cairo-concept\/","title":{"rendered":"Cairo \u56fe\u5f62\u6307\u5357 for Python (2) \u2014\u2014 Cairo \u6982\u5ff5"},"content":{"rendered":"<strong>\u4f5c\u8005<\/strong>\uff1a\u4faf\u5c11\u8f89\uff0cLD \u5f00\u53d1\u8005\uff0c\u672c\u6587\u539f\u8f7d<a href=\"http:\/\/www.linuxdeepin.com\/forum\/21\/3988\" target=\"_blank\">Linux Deepin \u8bba\u575b<\/a><\/p>\n<p>\u672c\u6587\u8bb2\u8ff0 Cairo \u56fe\u5f62\u5e93\u4e2d\u4e00\u4e9b\u6709\u7528\u7684\u5b9a\u4e49\/\u6982\u5ff5\uff0c\u7406\u89e3\u5b83\u4eec\u53ef\u4ee5\u5e2e\u52a9\u4f60\u66f4\u597d\u7684\u7406\u89e3 Cairo \u7ed8\u56fe\u6a21\u578b\u3002<\/p>\n<p><strong>\u73af\u5883 (Context)<\/strong><br \/>\n\u4f7f\u7528 Cairo \u7ed8\u56fe\uff0c\u5fc5\u987b\u8981\u9996\u5148\u521b\u5efa Cairo \u73af\u5883 (Context)\u3002Cairo \u73af\u5883\u4fdd\u5b58\u7740\u6240\u6709\u7684\u56fe\u5f62\u72b6\u6001\u53c2\u6570\uff0c\u8fd9\u4e9b\u53c2\u6570\u63cf\u8ff0\u4e86\u56fe\u5f62\u7684\u6784\u6210\uff0c\u8b6c\u5982\u7ebf\u6761\u5bbd\u5ea6\u3001\u989c\u8272\u3001\u8981\u7ed8\u5236\u7684\u5916\u89c2 (Surface) \u4ee5\u53ca\u5176\u5b83\u4e00\u4e9b\u4fe1\u606f\u3002Cairo \u73af\u5883\u5141\u8bb8\u771f\u6b63\u7684\u7ed8\u56fe\u51fd\u6570\u4f7f\u7528\u5f88\u5c11\u7684\u4e00\u90e8\u5206\u53c2\u6570\uff0c\u4ee5\u6b64\u63d0\u9ad8\u63a5\u53e3\u7684\u6613\u7528\u6027\u3002\u8c03\u7528 GdkDrawable \u5bf9\u8c61.cairo_create () \u51fd\u6570\u53ef\u4e3a\u6240\u7ed8\u5236\u7684\u56fe\u5f62\u521b\u5efa\u4e00\u4e2a Cairo \u73af\u5883\u3002\u4f8b\u5982<\/p>\n<pre>window = gtk.Window()\ncr = window.window.cairo_create ()\n<\/pre>\n<p>\u8fd9\u4e24\u884c\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a Cairo \u73af\u5883\uff0c\u5e76\u4e14\u8fd9\u4e2a Cairo \u73af\u5883\u662f\u5173\u8054\u5230 GdkDrawable \u5bf9\u8c61\u4e0a\u7684\u3002cairo_t \u7ed3\u6784\u4f53\u5305\u542b\u4e86\u5f53\u524d\u6e32\u67d3\u8bbe\u5907\u7684\u72b6\u6001\uff0c\u4e5f\u5305\u542b\u4e86\u6240\u7ed8\u5236\u56fe\u5f62\u7684\u5750\u6807\u3002\u4ece\u6280\u672f\u4e0a\u6765\u8bb2\uff0cwindow.window\u5c31\u662f\u6240\u8c13\u7684 Cairo \u73af\u5883\u3002<\/p>\n<p>Cairo \u6240\u6709\u7684\u7ed8\u56fe\u51fd\u6570\u90fd\u8981\u53bb\u64cd\u4f5c cairo_t \u5bf9\u8c61\u3002\u4e00\u4e2a Cairo \u73af\u5883\u53ef\u4ee5\u88ab\u5173\u8054\u5230\u4e00\u79cd\u7279\u5b9a\u7684\u5916\u89c2\uff0c\u8b6c\u5982 pdf\u3001svg\u3001png\u3001GdkDrawable \u7b49\u3002<\/p>\n<p>GDK \u6ca1\u6709\u5bf9 Cairo API \u8fdb\u884c\u5c01\u88c5\uff0c\u5b83\u53ea\u5141\u8bb8\u521b\u5efa\u4e00\u4e2a\u53ef\u57fa\u4e8e GdkDrawable \u5bf9\u8c61\u7ed8\u5236\u56fe\u5f62\u7684 Cairo \u73af\u5883\u3002\u6709\u4e00\u4e9b GDK \u51fd\u6570\u53ef\u4ee5\u5c06 GDK \u7684\u77e9\u5f62\u6216\u586b\u5145\u533a\u57df\u8f6c\u6362\u4e3a Cairo Path (\u8def\u5f84)\uff0c\u7136\u540e\u4f7f\u7528 Cairo \u7ed8\u56fe\u4e0e\u6e32\u67d3\u3002<\/p>\n<p><strong>\u8def\u5f84 (Path)<\/strong><br \/>\n\u4e00\u6761 Path\uff08\u8def\u5f84\uff09\u901a\u5e38\u662f\u7531\u4e00\u6761\u6216\u591a\u6761\u9996\u4f4d\u76f8\u63a5\u7684\u76f4\u7ebf\u6bb5\u6784\u6210\u7684\uff0c\u4e5f\u53ef\u4ee5\u7531\u76f4\u7ebf\u6bb5\u4e0e\u66f2\u7ebf\u6bb5\u6784\u6210\u3002\u8def\u5f84\u53ef\u5206\u4e3a Open\uff08\u5f00\u653e\uff09\u7c7b\u578b\u4e0e Closed\uff08\u95ed\u5408\uff09\u7c7b\u578b\uff0c\u524d\u8005\u7684\u9996\u5c3e\u7aef\u70b9\u4e0d\u91cd\u5408\uff0c\u540e\u8005\u7684\u9996\u5c3e\u7aef\u70b9\u91cd\u5408\u3002<\/p>\n<p>\u5728 Cairo \u4e2d\uff0c\u7ed8\u56fe\u8981\u4ece\u4e00\u6761\u7a7a\u8def\u5f84\u5f00\u59cb\uff0c\u9996\u5148\u5b9a\u4e49\u4e00\u6761\u8def\u5f84\uff0c\u7136\u540e\u901a\u8fc7\u7ed8\u5236\/\u586b\u5145\u64cd\u4f5c\u4f7f\u4e4b\u53ef\u89c1\u3002\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6bcf\u6b21\u8c03\u7528 stroke () \u6216 fill () \u51fd\u6570\u4e4b\u540e\uff0c\u8def\u5f84\u4f1a\u88ab\u6e05\u7a7a\uff0c\u4e0d\u5f97\u4e0d\u518d\u5b9a\u4e49\u65b0\u7684\u8def\u5f84\u3002<\/p>\n<p>\u4e00\u6761\u8def\u5f84\u53ef\u7531\u4e00\u4e9b\u5b50\u8def\u5f84\u6784\u6210\u3002<\/p>\n<p><strong>\u6e90 (Source)<\/strong><br \/>\n\u6e90\u597d\u6bd4\u7ed8\u56fe\u4e2d\u6240\u4f7f\u7528\u7684\u753b\u7b14\/\u989c\u6599\uff0c\u4f7f\u7528\u5b83\u6765\u7ed8\u5236\/\u586b\u5145\u56fe\u5f62\u8f6e\u5ed3\u3002\u6709 4 \u79cd\u57fa\u672c\u7684\u6e90\uff1acolor\u3001gradient\u3001pattern \u4e0e image\u3002<\/p>\n<p><strong>\u5916\u89c2 (Surface)<\/strong><br \/>\nSurface \u5c31\u662f\u8981\u7ed8\u5236\u56fe\u5f62\u7684\u6700\u7ec8\u4f53\u73b0\u5f62\u5f0f\uff0c\u8b6c\u5982\u53ef\u4f7f\u7528 PDF \u6216 PostScript \u5916\u89c2\u5b9e\u73b0\u6587\u672c\u5185\u5bb9\u7684\u6e32\u67d3\uff0c\u6216\u8005\u4f7f\u7528 Xlib\u3001Win32 \u5916\u89c2\u5b9e\u73b0\u5c4f\u5e55\u7ed8\u56fe\u3002<\/p>\n<p>Cairo \u5177\u4f53\u6709\u90a3\u4e9b\u5916\u89c2\u7c7b\u578b\uff0c\u53ef\u53c2\u8003\u5176\u5b9a\u4e49\uff1a<\/p>\n<blockquote><p>typedef enum _cairo_surface_type {<br \/>\nCAIRO_SURFACE_TYPE_IMAGE,<br \/>\nCAIRO_SURFACE_TYPE_PDF,<br \/>\nCAIRO_SURFACE_TYPE_PS,<br \/>\nCAIRO_SURFACE_TYPE_XLIB,<br \/>\nCAIRO_SURFACE_TYPE_XCB,<br \/>\nCAIRO_SURFACE_TYPE_GLITZ,<br \/>\nCAIRO_SURFACE_TYPE_QUARTZ,<br \/>\nCAIRO_SURFACE_TYPE_WIN32,<br \/>\nCAIRO_SURFACE_TYPE_BEOS,<br \/>\nCAIRO_SURFACE_TYPE_DIRECTFB,<br \/>\nCAIRO_SURFACE_TYPE_SVG,<br \/>\nCAIRO_SURFACE_TYPE_OS2<br \/>\n} cairo_surface_type_t;\u8499\u677f (Mask)<\/p><\/blockquote>\n<p>\u5728\u6e90\u4f5c\u7528\u4e8e\u5916\u89c2\u4e4b\u524d\uff0c\u53ef\u5bf9\u5176\u5b9e\u73b0\u8fc7\u6ee4\uff0c\u8499\u677f (mask) \u5373\u662f\u8fc7\u6ee4\u5668\u3002\u8499\u677f\u51b3\u5b9a\u54ea\u4e9b\u6e90\u53ef\u88ab\u663e\u793a\u3002\u8499\u677f\u4e0d\u900f\u660e\u7684\u90e8\u5206\u5141\u8bb8\u590d\u5236\u6e90\u81f3\u5916\u89c2\uff0c\u8499\u677f\u900f\u660e\u7684\u90e8\u5206\u5219\u7981\u6b62\u590d\u5236\u6e90\u81f3\u5916\u89c2\u3002<\/p>\n<p><strong>\u56fe\u6848 (Pattern)<\/strong><br \/>\n\u56fe\u6848\u8868\u793a\u88ab\u7ed8\u5236\u5230\u5916\u89c2\u7684\u6e90\u3002\u5728 Cairo \u4e2d\uff0c\u56fe\u6848\u662f\u4e00\u79cd\u53ef\u4ee5\u8bfb\u53d6\u7684\u5185\u5bb9\uff0c\u53ef\u7528\u4f5c\u7ed8\u56fe\u64cd\u4f5c\u7684\u6e90\u6216\u8499\u677f\u3002\u56fe\u6848\u53ef\u4ee5\u662f\u7eaf\u8272\u6a21\u5f0f\u3001\u57fa\u4e8e\u5916\u89c2\u7684\u6a21\u5f0f\u4ee5\u53ca\u6e10\u53d8\u6a21\u5f0f\u3002","protected":false},"excerpt":{"rendered":"<p>\u4f5c\u8005\uff1a\u4faf\u5c11\u8f89\uff0cLD \u5f00\u53d1\u8005\uff0c\u672c\u6587\u539f\u8f7dLinux Deepin \u8bba\u575b \u672c\u6587\u8bb2\u8ff0 Cairo \u56fe\u5f62\u5e93\u4e2d\u4e00\u4e9b\u6709\u7528\u7684\u5b9a\u4e49\/\u6982\u5ff5\uff0c\u7406\u89e3\u5b83\u4eec\u53ef\u4ee5\u5e2e\u52a9\u4f60\u66f4\u597d\u7684\u7406\u89e3 Cairo \u7ed8\u56fe\u6a21\u578b\u3002 \u73af\u5883 (Context) \u4f7f\u7528 Cairo \u7ed8\u56fe\uff0c\u5fc5\u987b\u8981\u9996\u5148\u521b\u5efa Cairo \u73af\u5883 (Context)\u3002Cairo \u73af\u5883\u4fdd\u5b58\u7740\u6240\u6709\u7684\u56fe\u5f62\u72b6\u6001\u53c2\u6570\uff0c\u8fd9\u4e9b\u53c2\u6570\u63cf\u8ff0\u4e86\u56fe\u5f62\u7684\u6784\u6210\uff0c\u8b6c\u5982\u7ebf\u6761\u5bbd\u5ea6\u3001\u989c\u8272\u3001\u8981\u7ed8\u5236\u7684\u5916\u89c2 (Surface)  ...<a href=https:\/\/www.deepin.org.cn\/zh\/cairo-graph-for-python-2-cairo-concept\/>\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":27,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[93],"tags":[],"_links":{"self":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/posts\/19477"}],"collection":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/users\/27"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/comments?post=19477"}],"version-history":[{"count":0,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/posts\/19477\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/media?parent=19477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/categories?post=19477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/tags?post=19477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}