{"id":44608,"date":"2023-11-16T13:06:28","date_gmt":"2023-03-23T11:31:24","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e7%9a%84drawstring%e5%87%bd%e6%95%b0%e5%b0%86%e6%97%a5%e8%af%ad%e7%bb%98%e5%88%b6%e5%88%b0%e5%9b%be%e5%83%8f%e4%b8%8a%e3%80%82\/"},"modified":"2024-05-04T09:21:29","modified_gmt":"2024-05-04T01:21:29","slug":"%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e7%9a%84drawstring%e5%87%bd%e6%95%b0%e5%b0%86%e6%97%a5%e8%af%ad%e7%bb%98%e5%88%b6%e5%88%b0%e5%9b%be%e5%83%8f%e4%b8%8a%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e7%9a%84drawstring%e5%87%bd%e6%95%b0%e5%b0%86%e6%97%a5%e8%af%ad%e7%bb%98%e5%88%b6%e5%88%b0%e5%9b%be%e5%83%8f%e4%b8%8a%e3%80%82\/","title":{"rendered":"\u4f7f\u7528GO\u8bed\u8a00\u7684DrawString\u51fd\u6570\u5c06\u65e5\u8bed\u7ed8\u5236\u5230\u56fe\u50cf\u4e0a"},"content":{"rendered":"

\u6211\u5728Go\u8bed\u8a00\u4e2d\u7814\u7a76\u4e86\u5982\u4f55\u7ed8\u5236\u65e5\u8bed\u6587\u5b57\u5230\u56fe\u50cf\u4e0a\u3002\u7531\u4e8e\u627e\u4e0d\u5230\u7c7b\u4f3c\u7684\u6587\u7ae0\uff0c\u6240\u4ee5\u6211\u51b3\u5b9a\u53d1\u8868\u4e00\u7bc7\u3002<\/p>\n

\u5f97\u51fa\u7ed3\u8bba<\/h2>\n

\u901a\u8fc7\u52a0\u8f7d\u5305\u542b\u65e5\u8bed\u5b57\u7b26\u7684\u5916\u90e8\u5b57\u4f53\u6587\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u7ed8\u5236\u65e5\u8bed\u5b57\u7b26\u3002<\/p>\n

    ftBinary<\/span>,<\/span> err<\/span> :=<\/span> ioutil<\/span>.<\/span>ReadFile<\/span>(<\/span>\"Koruri-Bold.ttf\"<\/span>)<\/span>\r\n    ft<\/span>,<\/span> err<\/span> :=<\/span> truetype<\/span>.<\/span>Parse<\/span>(<\/span>ftBinary<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u4e3a\u4ec0\u4e48\u65e0\u6cd5\u7528\u65e5\u8bed\u7ed8\u5236\uff1f<\/h2>\n
\u6211\u60f3\u8981\u7ed8\u5236\u65e5\u672c\u8bed\uff0c\u5e76\u53c2\u8003\u4e86\u4e0b\u9762\u7684\u6587\u7ae0\uff0c\u7c97\u7565\u5730\u5236\u4f5c\u4e86\u4e00\u4e2a\u80fd\u5728\u56fe\u50cf\u4e2d\u7ed8\u5236\u65e5\u672c\u8bed\u7684\u6e90\u4ee3\u7801\u3002<\/p>\n
\u53c2\u8003: \u4f7f\u7528Go\u8bed\u8a00\u548c\u5f69\u8272\u8868\u60c5\u7b26\u53f7\u5408\u6210\u56fe\u50cf<\/p>\n
\u7136\u800c\uff0c\u51fa\u73b0\u4e86\u719f\u6089\u7684\u4e71\u7801\u95ee\u9898\u3002<\/p>\n
\"mojibake.png\"<\/div>\n
\u6587\u5b57\u5316\u3051\u30bd\u30fc\u30b9\u5168\u6587\u7684\u610f\u601d\u662f\u201c\u6587\u5b57\u4e71\u7801\u6e90\u4ee3\u7801\u201d\u7684\u5168\u90e8\u5185\u5bb9\u3002<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"bytes\"<\/span>\r\n    \"fmt\"<\/span>\r\n    \"image\"<\/span>\r\n    \"image\/png\"<\/span>\r\n    \"os\"<\/span>\r\n\r\n    \"github.com\/golang\/freetype\/truetype\"<\/span>\r\n    \"golang.org\/x\/image\/font\"<\/span>\r\n    \"golang.org\/x\/image\/font\/gofont\/gobold\"<\/span>\r\n    \"golang.org\/x\/image\/math\/fixed\"<\/span>\r\n)<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    \/\/ \u30d5\u30a9\u30f3\u30c8\u306e\u8aad\u307f\u8fbc\u307f<\/span>\r\n    ft<\/span>,<\/span> err<\/span> :=<\/span> truetype<\/span>.<\/span>Parse<\/span>(<\/span>gobold<\/span>.<\/span>TTF<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Fprintln<\/span>(<\/span>os<\/span>.<\/span>Stderr<\/span>,<\/span> err<\/span>)<\/span>\r\n        os<\/span>.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    opt<\/span> :=<\/span> truetype<\/span>.<\/span>Options<\/span>{<\/span>\r\n        Size<\/span>:<\/span>              90<\/span>,<\/span>\r\n        DPI<\/span>:<\/span>               0<\/span>,<\/span>\r\n        Hinting<\/span>:<\/span>           0<\/span>,<\/span>\r\n        GlyphCacheEntries<\/span>:<\/span> 0<\/span>,<\/span>\r\n        SubPixelsX<\/span>:<\/span>        0<\/span>,<\/span>\r\n        SubPixelsY<\/span>:<\/span>        0<\/span>,<\/span>\r\n    }<\/span>\r\n\r\n    imageWidth<\/span> :=<\/span> 100<\/span>\r\n    imageHeight<\/span> :=<\/span> 100<\/span>\r\n    textTopMargin<\/span> :=<\/span> 90<\/span>\r\n    text<\/span> :=<\/span> \"\u3042\"<\/span>\r\n\r\n    img<\/span> :=<\/span> image<\/span>.<\/span>NewRGBA<\/span>(<\/span>image<\/span>.<\/span>Rect<\/span>(<\/span>0<\/span>,<\/span> 0<\/span>,<\/span> imageWidth<\/span>,<\/span> imageHeight<\/span>))<\/span>\r\n\r\n    face<\/span> :=<\/span> truetype<\/span>.<\/span>NewFace<\/span>(<\/span>ft<\/span>,<\/span> &<\/span>opt<\/span>)<\/span>\r\n\r\n    dr<\/span> :=<\/span> &<\/span>font<\/span>.<\/span>Drawer<\/span>{<\/span>\r\n        Dst<\/span>:<\/span>  img<\/span>,<\/span>\r\n        Src<\/span>:<\/span>  image<\/span>.<\/span>Black<\/span>,<\/span>\r\n        Face<\/span>:<\/span> face<\/span>,<\/span>\r\n        Dot<\/span>:<\/span>  fixed<\/span>.<\/span>Point26_6<\/span>{},<\/span>\r\n    }<\/span>\r\n\r\n    dr<\/span>.<\/span>Dot<\/span>.<\/span>X<\/span> =<\/span> (<\/span>fixed<\/span>.<\/span>I<\/span>(<\/span>imageWidth<\/span>)<\/span> -<\/span> dr<\/span>.<\/span>MeasureString<\/span>(<\/span>text<\/span>))<\/span> \/<\/span> 2<\/span>\r\n    dr<\/span>.<\/span>Dot<\/span>.<\/span>Y<\/span> =<\/span> fixed<\/span>.<\/span>I<\/span>(<\/span>textTopMargin<\/span>)<\/span>\r\n\r\n    dr<\/span>.<\/span>DrawString<\/span>(<\/span>text<\/span>)<\/span>\r\n\r\n    buf<\/span> :=<\/span> &<\/span>bytes<\/span>.<\/span>Buffer<\/span>{}<\/span>\r\n    err<\/span> =<\/span> png<\/span>.<\/span>Encode<\/span>(<\/span>buf<\/span>,<\/span> img<\/span>)<\/span>\r\n\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Fprintln<\/span>(<\/span>os<\/span>.<\/span>Stderr<\/span>,<\/span> err<\/span>)<\/span>\r\n        os<\/span>.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    file<\/span>,<\/span> err<\/span> :=<\/span> os<\/span>.<\/span>Create<\/span>(<\/span>`test.png`<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Fprintln<\/span>(<\/span>os<\/span>.<\/span>Stderr<\/span>,<\/span> err<\/span>)<\/span>\r\n        os<\/span>.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>\r\n    }<\/span>\r\n    defer<\/span> file<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n    file<\/span>.<\/span>Write<\/span>(<\/span>buf<\/span>.<\/span>Bytes<\/span>())<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
truetype.Parse(gobold.TTF) \u5728\u505a\u4ec0\u4e48\uff1f<\/h2>\n
\u6211\u67e5\u770b\u4e86\u6e90\u4ee3\u7801\uff0c\u4e86\u89e3\u4e86 truetype.Parse(gobold.TTF) \u51fd\u6570\u662f\u7528\u6765\u52a0\u8f7d\u5b57\u4f53\u6587\u4ef6\u7684\u64cd\u4f5c\u3002<\/p>\n
\u5f15\u7528\u81eaGobold.TTF\u5b57\u4f53\u6587\u4ef6<\/p>\n
\/\/ generated by go run gen.go; DO NOT EDIT<\/span>\r\n\r\n\/\/ Package gobold provides the \"Go Bold\" TrueType font<\/span>\r\n\/\/ from the Go font family. It is a proportional-width, sans-serif font.<\/span>\r\n\/\/<\/span>\r\n\/\/ See https:\/\/blog.golang.org\/go-fonts for details.<\/span>\r\npackage<\/span> gobold<\/span>\r\n\r\n\/\/ TTF is the data for the \"Go Bold\" TrueType font.<\/span>\r\nvar<\/span> TTF<\/span> =<\/span> []<\/span>byte<\/span>{<\/span>\r\n    0x00<\/span>,<\/span> 0x01<\/span>,<\/span> 0x00<\/span>,<\/span> 0x00<\/span>,<\/span> 0x00<\/span>,<\/span> 0x0e<\/span>,<\/span> 0x00<\/span>,<\/span> 0x80<\/span>,<\/span> 0x00<\/span>,<\/span> 0x03<\/span>,<\/span> 0x00<\/span>,<\/span> 0x60<\/span>,<\/span> 0x4f<\/span>,<\/span> 0x53<\/span>,<\/span> 0x2f<\/span>,<\/span> 0x32<\/span>,<\/span>\r\n\/\/ \u4ee5\u4e0b\u7565<\/span>\r\n<\/code><\/pre>\n
\u6211\u53d1\u73b0\u5728\u8bc4\u8bba\u4e2d\uff0cGo Bold True Type \u5b57\u4f53\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u6570\u7ec4\u88ab\u6ce8\u518c\u4e3agobold.TTF\u3002<\/p>\n
\u67e5\u770b\u8bc4\u8bba\u4e2d\u63d0\u5230\u7684The Go Blog – Go\u5b57\u4f53\u3002<\/p>\n
Go\u5b57\u4f53\u662fWGL4\u5b57\u7b26\u96c6\uff0c\u5e76\u4e0d\u5305\u542b\u65e5\u8bed\u3002<\/p>\n
\u56e0\u6b64\uff0c\u53ef\u4ee5\u63a8\u6d4b\u51fa\u7531\u4e8e\u6ca1\u6709\u76f8\u5e94\u7684\u5b57\u7b26\u800c\u51fa\u73b0\u4e71\u7801\u3002<\/p>\n
\u5982\u679c\u52a0\u8f7d\u4e86\u5305\u542b\u65e5\u8bed\u5b57\u7b26\u7684\u5916\u90e8\u5b57\u4f53\uff0c\u5c31\u4e0d\u4f1a\u51fa\u73b0\u4e71\u7801\u3002<\/h2>\n
\u6b63\u5982\u524d\u9762\u6240\u63d0\u5230\u7684\uff0c\u53ea\u8981\u52a0\u8f7d\u5916\u90e8\u5b57\u4f53\u6587\u4ef6\uff0c\u5c31\u53ef\u4ee5\u6b63\u786e\u663e\u793a\u65e5\u8bed\u800c\u4e0d\u4f1a\u51fa\u73b0\u4e71\u7801\u3002<\/p>\n
\u6211\u4f7f\u7528\u4e86Koruri\u5b57\u4f53\u5728\u65e5\u8bed\u5b57\u4f53\u4e0a\u3002(\u6211\u9884\u5148\u4e0b\u8f7d\u597d\uff0c\u5e76\u4e0eGO\u4e8c\u8fdb\u5236\u6587\u4ef6\u653e\u5728\u540c\u4e00\u4f4d\u7f6e\u3002)<\/p>\n
    ftBinary<\/span>,<\/span> err<\/span> :=<\/span> ioutil<\/span>.<\/span>ReadFile<\/span>(<\/span>\"Koruri-Bold.ttf\"<\/span>)<\/span>\r\n    ft<\/span>,<\/span> err<\/span> :=<\/span> truetype<\/span>.<\/span>Parse<\/span>(<\/span>ftBinary<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u7ed8\u5236\u65e5\u8bed\u7684\u56fe\u50cf<\/p>\n
\"nihongook.png\"<\/div>\n
\u5168\u6587\u6e90\u4ee3\u7801<\/p>\n
:<\/span>nihongook<\/span>.<\/span>go<\/span>\r\npackage<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"bytes\"<\/span>\r\n    \"fmt\"<\/span>\r\n    \"image\"<\/span>\r\n    \"image\/png\"<\/span>\r\n    \"os\"<\/span>\r\n\r\n    \"github.com\/golang\/freetype\/truetype\"<\/span>\r\n    \"golang.org\/x\/image\/font\"<\/span>\r\n    \"golang.org\/x\/image\/font\/gofont\/gobold\"<\/span>\r\n    \"golang.org\/x\/image\/math\/fixed\"<\/span>\r\n)<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    \/\/ \u30d5\u30a9\u30f3\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f<\/span>\r\n    ftBinary<\/span>,<\/span> err<\/span> :=<\/span> ioutil<\/span>.<\/span>ReadFile<\/span>(<\/span>\"Koruri-Bold.ttf\"<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Fprintln<\/span>(<\/span>os<\/span>.<\/span>Stderr<\/span>,<\/span> err<\/span>)<\/span>\r\n        os<\/span>.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    ft<\/span>,<\/span> err<\/span> :=<\/span> truetype<\/span>.<\/span>Parse<\/span>(<\/span>ftBinary<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Fprintln<\/span>(<\/span>os<\/span>.<\/span>Stderr<\/span>,<\/span> err<\/span>)<\/span>\r\n        os<\/span>.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    opt<\/span> :=<\/span> truetype<\/span>.<\/span>Options<\/span>{<\/span>\r\n        Size<\/span>:<\/span>              90<\/span>,<\/span>\r\n        DPI<\/span>:<\/span>               0<\/span>,<\/span>\r\n        Hinting<\/span>:<\/span>           0<\/span>,<\/span>\r\n        GlyphCacheEntries<\/span>:<\/span> 0<\/span>,<\/span>\r\n        SubPixelsX<\/span>:<\/span>        0<\/span>,<\/span>\r\n        SubPixelsY<\/span>:<\/span>        0<\/span>,<\/span>\r\n    }<\/span>\r\n\r\n    imageWidth<\/span> :=<\/span> 100<\/span>\r\n    imageHeight<\/span> :=<\/span> 100<\/span>\r\n    textTopMargin<\/span> :=<\/span> 90<\/span>\r\n    text<\/span> :=<\/span> \"\u3042\"<\/span>\r\n\r\n    img<\/span> :=<\/span> image<\/span>.<\/span>NewRGBA<\/span>(<\/span>image<\/span>.<\/span>Rect<\/span>(<\/span>0<\/span>,<\/span> 0<\/span>,<\/span> imageWidth<\/span>,<\/span> imageHeight<\/span>))<\/span>\r\n\r\n    face<\/span> :=<\/span> truetype<\/span>.<\/span>NewFace<\/span>(<\/span>ft<\/span>,<\/span> &<\/span>opt<\/span>)<\/span>\r\n\r\n    dr<\/span> :=<\/span> &<\/span>font<\/span>.<\/span>Drawer<\/span>{<\/span>\r\n        Dst<\/span>:<\/span>  img<\/span>,<\/span>\r\n        Src<\/span>:<\/span>  image<\/span>.<\/span>Black<\/span>,<\/span>\r\n        Face<\/span>:<\/span> face<\/span>,<\/span>\r\n        Dot<\/span>:<\/span>  fixed<\/span>.<\/span>Point26_6<\/span>{},<\/span>\r\n    }<\/span>\r\n\r\n    dr<\/span>.<\/span>Dot<\/span>.<\/span>X<\/span> =<\/span> (<\/span>fixed<\/span>.<\/span>I<\/span>(<\/span>imageWidth<\/span>)<\/span> -<\/span> dr<\/span>.<\/span>MeasureString<\/span>(<\/span>text<\/span>))<\/span> \/<\/span> 2<\/span>\r\n    dr<\/span>.<\/span>Dot<\/span>.<\/span>Y<\/span> =<\/span> fixed<\/span>.<\/span>I<\/span>(<\/span>textTopMargin<\/span>)<\/span>\r\n\r\n    dr<\/span>.<\/span>DrawString<\/span>(<\/span>text<\/span>)<\/span>\r\n\r\n    buf<\/span> :=<\/span> &<\/span>bytes<\/span>.<\/span>Buffer<\/span>{}<\/span>\r\n    err<\/span> =<\/span> png<\/span>.<\/span>Encode<\/span>(<\/span>buf<\/span>,<\/span> img<\/span>)<\/span>\r\n\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Fprintln<\/span>(<\/span>os<\/span>.<\/span>Stderr<\/span>,<\/span> err<\/span>)<\/span>\r\n        os<\/span>.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    file<\/span>,<\/span> err<\/span> :=<\/span> os<\/span>.<\/span>Create<\/span>(<\/span>`test.png`<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Fprintln<\/span>(<\/span>os<\/span>.<\/span>Stderr<\/span>,<\/span> err<\/span>)<\/span>\r\n        os<\/span>.<\/span>Exit<\/span>(<\/span>1<\/span>)<\/span>\r\n    }<\/span>\r\n    defer<\/span> file<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n    file<\/span>.<\/span>Write<\/span>(<\/span>buf<\/span>.<\/span>Bytes<\/span>())<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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