update to latest

.gitignore

@@ -28,3 +28,4 @@ go.work.sum
 build
 assets
 libgofunc
+libgo

escpos_printer.go

@@ -91,7 +91,8 @@ func toMonochrome(img image.Image) *image.Gray {
 	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
 		for x := bounds.Min.X; x < bounds.Max.X; x++ {
 			r, g, b, _ := img.At(x, y).RGBA()
-			grayValue := uint8((r + g + b) / 3 >> 8)
+			// grayValue := uint8((r + g + b) / 3 >> 8)
+			grayValue := uint8((0.299*float64(r) + 0.587*float64(g) + 0.114*float64(b)) / 256.0)
 			if grayValue > 128 {
 				gray.Set(x, y, color.White)
 			} else {
@@ -138,7 +139,6 @@ func escposRaster(img *image.Gray) []byte {
 			data = append(data, b)
 		}
 	}
-
 	return data
 }
 

go.mod

@@ -1,6 +1,6 @@
 module gt.mokkon.com/sainw/libgofunc
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/dlclark/regexp2 v1.11.5
@@ -10,37 +10,7 @@ require (
 	golang.org/x/net v0.52.0
 )
 
-require (
-	codeberg.org/go-latex/latex v0.2.0 // indirect
-	codeberg.org/go-pdf/fpdf v0.11.1 // indirect
-	github.com/BurntSushi/freetype-go v0.0.0-20160129220410-b763ddbfe298 // indirect
-	github.com/BurntSushi/graphics-go v0.0.0-20160129215708-b43f31a4a966 // indirect
-	github.com/BurntSushi/xgb v0.0.0-20210121224620-deaf085860bc // indirect
-	github.com/BurntSushi/xgbutil v0.0.0-20190907113008-ad855c713046 // indirect
-	github.com/ByteArena/poly2tri-go v0.0.0-20170716161910-d102ad91854f // indirect
-	github.com/Kagami/go-avif v0.1.0 // indirect
-	github.com/andybalholm/brotli v1.2.1 // indirect
-	github.com/benoitkugler/textlayout v0.3.2 // indirect
-	github.com/benoitkugler/textprocessing v0.0.6 // indirect
-	github.com/go-fonts/latin-modern v0.3.3 // indirect
-	github.com/go-text/typesetting v0.3.4 // indirect
-	github.com/kolesa-team/go-webp v1.0.5 // indirect
-	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
-	github.com/srwiley/scanx v0.0.0-20190309010443-e94503791388 // indirect
-	github.com/tdewolff/font v0.0.0-20260314002930-9f995dac393e // indirect
-	github.com/tdewolff/minify/v2 v2.24.11 // indirect
-	github.com/tdewolff/parse/v2 v2.8.11 // indirect
-	github.com/wcharczuk/go-chart/v2 v2.1.2 // indirect
-	github.com/yuin/goldmark v1.8.2 // indirect
-	gonum.org/v1/plot v0.16.0 // indirect
-	modernc.org/knuth v0.5.5 // indirect
-	modernc.org/token v1.1.0 // indirect
-	star-tex.org/x/tex v0.7.1 // indirect
-)
-
 require (
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
-	github.com/google/gousb v1.1.3
-	github.com/tdewolff/canvas v0.0.0-20260406091912-5d4f7059846e
 	golang.org/x/text v0.35.0 // indirect
 )

go.sum

@@ -1,148 +1,16 @@
-codeberg.org/go-latex/latex v0.2.0 h1:Ol/a6VHY06N+5gPfewswymoRb5ZcKDXWVaVegcx4hbI=
-codeberg.org/go-latex/latex v0.2.0/go.mod h1:VJAwQir7/T8LZxj7xAPivISKiVOwkMpQ8bTuPQ31X0Y=
-codeberg.org/go-pdf/fpdf v0.11.1 h1:U8+coOTDVLxHIXZgGvkfQEi/q0hYHYvEHFuGNX2GzGs=
-codeberg.org/go-pdf/fpdf v0.11.1/go.mod h1:Y0DGRAdZ0OmnZPvjbMp/1bYxmIPxm0ws4tfoPOc4LjU=
-github.com/BurntSushi/freetype-go v0.0.0-20160129220410-b763ddbfe298 h1:1qlsVAQJXZHsaM8b6OLVo6muQUQd4CwkH/D3fnnbHXA=
-github.com/BurntSushi/freetype-go v0.0.0-20160129220410-b763ddbfe298/go.mod h1:D+QujdIlUNfa0igpNMk6UIvlb6C252URs4yupRUV4lQ=
-github.com/BurntSushi/graphics-go v0.0.0-20160129215708-b43f31a4a966 h1:lTG4HQym5oPKjL7nGs+csTgiDna685ZXjxijkne828g=
-github.com/BurntSushi/graphics-go v0.0.0-20160129215708-b43f31a4a966/go.mod h1:Mid70uvE93zn9wgF92A/r5ixgnvX8Lh68fxp9KQBaI0=
-github.com/BurntSushi/xgb v0.0.0-20210121224620-deaf085860bc h1:7D+Bh06CRPCJO3gr2F7h1sriovOZ8BMhca2Rg85c2nk=
-github.com/BurntSushi/xgb v0.0.0-20210121224620-deaf085860bc/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/BurntSushi/xgbutil v0.0.0-20190907113008-ad855c713046 h1:O/r2Sj+8QcMF7V5IcmiE2sMFV2q3J47BEirxbXJAdzA=
-github.com/BurntSushi/xgbutil v0.0.0-20190907113008-ad855c713046/go.mod h1:uw9h2sd4WWHOPdJ13MQpwK5qYWKYDumDqxWWIknEQ+k=
-github.com/ByteArena/poly2tri-go v0.0.0-20170716161910-d102ad91854f h1:l7moT9o/v/9acCWA64Yz/HDLqjcRTvc0noQACi4MsJw=
-github.com/ByteArena/poly2tri-go v0.0.0-20170716161910-d102ad91854f/go.mod h1:vIOkSdX3NDCPwgu8FIuTat2zDF0FPXXQ0RYFRy+oQic=
-github.com/Kagami/go-avif v0.1.0 h1:8GHAGLxCdFfhpd4Zg8j1EqO7rtcQNenxIDerC/uu68w=
-github.com/Kagami/go-avif v0.1.0/go.mod h1:OPmPqzNdQq3+sXm0HqaUJQ9W/4k+Elbc3RSfJUemDKA=
-github.com/andybalholm/brotli v1.2.1 h1:R+f5xP285VArJDRgowrfb9DqL18yVK0gKAW/F+eTWro=
-github.com/andybalholm/brotli v1.2.1/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
-github.com/benoitkugler/pstokenizer v1.0.0/go.mod h1:l1G2Voirz0q/jj0TQfabNxVsa8HZXh/VMxFSRALWTiE=
-github.com/benoitkugler/textlayout v0.3.2 h1:Y/LTkwpQ9G0Fia9yhPmZA9IR5AnE8Cq30j3C+Gx5/IE=
-github.com/benoitkugler/textlayout v0.3.2/go.mod h1:o+1hFV+JSHBC9qNLIuwVoLedERU7sBPgEFcuSgfvi/w=
-github.com/benoitkugler/textlayout-testdata v0.1.1/go.mod h1:i/qZl09BbUOtd7Bu/W1CAubRwTWrEXWq6JwMkw8wYxo=
-github.com/benoitkugler/textprocessing v0.0.6 h1:obkMyj62GEPg3xUVYqROlCN22z1OleuZm6ULqX9Om1g=
-github.com/benoitkugler/textprocessing v0.0.6/go.mod h1:Io0gN08/PXEzrSOWFa88xHx2Xv3VjvLMY7H76YoI23A=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dlclark/regexp2 v1.11.5 h1:Q/sSnsKerHeCkc/jSTNq1oCm7KiVgUMZRDUoRu0JQZQ=
 github.com/dlclark/regexp2 v1.11.5/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/fogleman/gg v1.3.0 h1:/7zJX8F6AaYQc57WQCyN9cAIz+4bCJGO9B+dyW29am8=
 github.com/fogleman/gg v1.3.0/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k=
-github.com/go-fonts/latin-modern v0.3.3 h1:g2xNgI8yzdNzIVm+qvbMryB6yGPe0pSMss8QT3QwlJ0=
-github.com/go-fonts/latin-modern v0.3.3/go.mod h1:tHaiWDGze4EPB0Go4cLT5M3QzRY3peya09Z/8KSCrpY=
-github.com/go-text/typesetting v0.3.4 h1:YYurUOtEb9kGSOz4uE3k4OpBGsp1dDL8+fjCeaFamAU=
-github.com/go-text/typesetting v0.3.4/go.mod h1:4qZCQphq4KSgGTAeI0uMEkVbROgfah8BuyF5LRYr7XY=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gousb v1.1.3 h1:xt6M5TDsGSZ+rlomz5Si5Hmd/Fvbmo2YCJHN+yGaK4o=
 github.com/google/gousb v1.1.3/go.mod h1:GGWUkK0gAXDzxhwrzetW592aOmkkqSGcj5KLEgmCVUg=
 github.com/kenshaw/escpos v0.0.0-20221114190919-df06b682a8fc h1:4JwmN2Scz1vR+hfSxkdy2IE/DzxX2Cftm2lhWHyN0k0=
 github.com/kenshaw/escpos v0.0.0-20221114190919-df06b682a8fc/go.mod h1:M+GIBmg2MqaSWIJrXCZS+/wRFbr9fOguRz3SHn8DRPE=
-github.com/kolesa-team/go-webp v1.0.5 h1:GZQHJBaE8dsNKZltfwqsL0qVJ7vqHXsfA+4AHrQW3pE=
-github.com/kolesa-team/go-webp v1.0.5/go.mod h1:QmJu0YHXT3ex+4SgUvs+a+1SFCDcCqyZg+LbIuNNTnE=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef h1:Ch6Q+AZUxDBCVqdkI8FSpFyZDtCVBc2VmejdNrm5rRQ=
-github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef/go.mod h1:nXTWP6+gD5+LUJ8krVhhoeHjvHTutPxMYl5SvkcnJNE=
-github.com/srwiley/scanx v0.0.0-20190309010443-e94503791388 h1:ZdkidVdpLW13BQ9a+/3uerT2ezy9J7KQWH18JCfhDmI=
-github.com/srwiley/scanx v0.0.0-20190309010443-e94503791388/go.mod h1:C/WY5lmWfMtPFYYBTd3Lzdn4FTLr+RxlIeiBNye+/os=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/tdewolff/canvas v0.0.0-20260406091912-5d4f7059846e h1:A8iHpv0I/IDv+i5YQ/km/UlqSmonRz4UNIrckFxYc+A=
-github.com/tdewolff/canvas v0.0.0-20260406091912-5d4f7059846e/go.mod h1:xCHrGFuVb9eeblIAffMuLzKoRnYHQj8xZq8yZ7YQfEw=
-github.com/tdewolff/font v0.0.0-20260314002930-9f995dac393e h1:20EEwnJWwKApfX5KttlWbIjgXrXa+HUvkiVUow1hdJ0=
-github.com/tdewolff/font v0.0.0-20260314002930-9f995dac393e/go.mod h1:EFuulYdR5cCTF2zKMW6NxchFgd5xtEPSrjkD1MFWDpA=
-github.com/tdewolff/minify/v2 v2.24.11 h1:JlANsiWaRBXedoYtsiZgY3YFkdr42oF32vp2SLgQKi4=
-github.com/tdewolff/minify/v2 v2.24.11/go.mod h1:exq1pjdrh9uAICdfVKQwqz6MsJmWmQahZuTC6pTO6ro=
-github.com/tdewolff/parse/v2 v2.8.11 h1:SGyjEy3xEqd+W9WVzTlTQ5GkP/en4a1AZNZVJ1cvgm0=
-github.com/tdewolff/parse/v2 v2.8.11/go.mod h1:Hwlni2tiVNKyzR1o6nUs4FOF07URA+JLBLd6dlIXYqo=
-github.com/tdewolff/test v1.0.11/go.mod h1:XPuWBzvdUzhCuxWO1ojpXsyzsA5bFoS3tO/Q3kFuTG8=
-github.com/wcharczuk/go-chart/v2 v2.1.2 h1:Y17/oYNuXwZg6TFag06qe8sBajwwsuvPiJJXcUcLL6E=
-github.com/wcharczuk/go-chart/v2 v2.1.2/go.mod h1:Zi4hbaqlWpYajnXB2K22IUYVXRXaLfSGNNR7P4ukyyQ=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-github.com/yuin/goldmark v1.8.2 h1:kEGpgqJXdgbkhcOgBxkC0X0PmoPG1ZyoZ117rDVp4zE=
-github.com/yuin/goldmark v1.8.2/go.mod h1:ip/1k0VRfGynBgxOz0yCqHrbZXhcjxyuS66Brc7iBKg=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
-golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
-golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
-golang.org/x/image v0.0.0-20210504121937-7319ad40d33e/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
-golang.org/x/image v0.18.0/go.mod h1:4yyo5vMFQjVjUcVk4jEQcU9MGy/rulF5WvUILseCM2E=
-golang.org/x/image v0.24.0 h1:AN7zRgVsbvmTfNyqIbbOraYL8mSwcKncEj8ofjgzcMQ=
-golang.org/x/image v0.24.0/go.mod h1:4b/ITuLfqYq1hqZcjofwctIhi7sZh2WaCjvsBNjjya8=
 golang.org/x/image v0.38.0 h1:5l+q+Y9JDC7mBOMjo4/aPhMDcxEptsX+Tt3GgRQRPuE=
 golang.org/x/image v0.38.0/go.mod h1:/3f6vaXC+6CEanU4KJxbcUZyEePbyKbaLoDOe4ehFYY=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
-golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
-golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
-golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
-golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
-golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
-golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
 golang.org/x/net v0.52.0 h1:He/TN1l0e4mmR3QqHMT2Xab3Aj3L9qjbhRm78/6jrW0=
 golang.org/x/net v0.52.0/go.mod h1:R1MAz7uMZxVMualyPXb+VaqGSa3LIaUqk0eEt3w36Sw=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
-golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
-golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
-golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
-golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
-golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
-golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
 golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
 golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
-golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gonum.org/v1/plot v0.16.0 h1:dK28Qx/Ky4VmPUN/2zeW0ELyM6ucDnBAj5yun7M9n1g=
-gonum.org/v1/plot v0.16.0/go.mod h1:Xz6U1yDMi6Ni6aaXILqmVIb6Vro8E+K7Q/GeeH+Pn0c=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-modernc.org/knuth v0.5.5 h1:6lap2U/ISm8aC/4NU58ALFCRllNPaK0EZcIGY/oDgUg=
-modernc.org/knuth v0.5.5/go.mod h1:e5SBb35HQBj2aFwbBO3ClPcViLY3Wi0LzaOd7c/3qMk=
-modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
-modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
-star-tex.org/x/tex v0.7.1 h1:4qGAByRyY0WQsOjtcHlxz+FgrYxz8fzxIds2Gjepp5U=
-star-tex.org/x/tex v0.7.1/go.mod h1:Y3y0U7sZTltTh/CDZIx0oAtMjG7eMaTuTtvDZGdyhJo=

img.go

@@ -103,7 +103,10 @@ func GenImg(width int, outputPath, payload, tmpl string) string {
 }
 
 func renderTemplate(tmp string, data map[string]interface{}) (string, error) {
-	tmpl := template.Must(template.New("mytemplate").Parse(tmp))
+	tmpl, err := template.New("mytemplate").Parse(tmp)
+	if err != nil {
+		return "", err
+	}
 	var buf bytes.Buffer
 	if err := tmpl.Execute(&buf, data); err != nil {
 		return "", err
@@ -124,7 +127,11 @@ func renderNode(dc *gg.Context, canvasWidth int, n *Node, y *int, face font.Face
 	case "h3":
 		drawTextBlock(dc, n, canvasWidth, eleH3Size, y, face)
 	case "p":
-		drawTextBlock(dc, n, canvasWidth, elePSize, y, face)
+		size := float64(elePSize)
+		if n.Style.FontSize > 0 {
+			size = n.Style.FontSize
+		}
+		drawTextBlock(dc, n, canvasWidth, size, y, face)
 	case "hr":
 		renderLine(dc, n, canvasWidth, y)
 	case "img":
@@ -209,7 +216,7 @@ func drawImage(dc *gg.Context, n *Node, y *int) {
 }
 
 func renderTable(dc *gg.Context, canvasWidth int, table *Node, y *int, face font.Face) {
-	rows := extractRows(table)
+	headers, rows := extractRows(table)
 	if len(rows) == 0 {
 		return
 	}
@@ -223,9 +230,11 @@ func renderTable(dc *gg.Context, canvasWidth int, table *Node, y *int, face font
 	colCount := len(rows[0])
 	cellWidth := (canvasWidth - padding) / colCount
 	border := table.Style.Border
+
 	for _, row := range rows {
 		x := padding
-		for _, cell := range row {
+		for i, cell := range row {
+			header := headers[i]
 			if border > 0 {
 				dc.SetLineWidth(border)
 				dc.DrawRectangle(float64(x), float64(*y), float64(cellWidth), fontSize+defalutTableBorder)
@@ -233,7 +242,11 @@ func renderTable(dc *gg.Context, canvasWidth int, table *Node, y *int, face font
 			dc.Stroke()
 			dc.SetRGB(0, 0, 0)
 			dc.DrawStringAnchored(cell, float64(x+8), float64(*y+20), 0, 0)
-			x += cellWidth
+			if w := header.Style.Width; w > 0 {
+				x += int(w)
+			} else {
+				x += cellWidth
+			}
 		}
 		*y += int(fontSize) + defalutTableBorder
 	}
@@ -247,8 +260,9 @@ func renderLine(dc *gg.Context, line *Node, canvasWidth int, y *int) {
 	*y += int(height)
 }
 
-func extractRows(table *Node) [][]string {
+func extractRows(table *Node) ([]*Node, [][]string) {
 	var rows [][]string
+	var headers []*Node
 	var traverse func(*Node)
 	traverse = func(n *Node) {
 		if n.Tag == "tr" {
@@ -257,6 +271,9 @@ func extractRows(table *Node) [][]string {
 				if td.Tag == "td" || td.Tag == "th" {
 					row = append(row, td.Text)
 				}
+				if td.Tag == "th" {
+					headers = append(headers, td)
+				}
 			}
 			if len(row) > 0 {
 				rows = append(rows, row)
@@ -267,7 +284,7 @@ func extractRows(table *Node) [][]string {
 		}
 	}
 	traverse(table)
-	return rows
+	return headers, rows
 }
 
 func extractNodeRows(table *html.Node) [][]string {
@@ -332,9 +349,14 @@ func printImg(prt *escpos.Escpos, imgPath string) error {
 		fmt.Println(err)
 		return err
 	}
+	data := []byte{0x1D, 0x4C, 0x00, 0x00}
+	_, err = prt.WriteRaw(data)
+	if err != nil {
+		fmt.Println("error 0x1D, 0x4C:", err.Error())
+	}
 
 	gray := toMonochrome(img)
-	data := escposRaster(gray)
+	data = escposRaster(gray)
 
 	_, err = prt.WriteRaw(data)
 	return err

printer.go

@@ -17,33 +17,11 @@ import (
 
 	"github.com/kenshaw/escpos"
 )
-import (
-	"fmt"
-
-	"github.com/google/gousb"
-)
-
-type USBReadWriter struct {
-	out *gousb.OutEndpoint
-	in  *gousb.InEndpoint // Optional, can be nil if you only write
-}
-
-func (urw *USBReadWriter) Write(p []byte) (n int, err error) {
-	return urw.out.Write(p)
-}
-
-func (urw *USBReadWriter) Read(p []byte) (n int, err error) {
-	if urw.in == nil {
-		return 0, fmt.Errorf("read not supported")
-	}
-	return urw.in.Read(p)
-}
 
 //export PrintImg
 func PrintImg(printer *C.char, imagePath *C.char) *C.char {
 	goPrinter := C.GoString(printer)
 	goImagePath := C.GoString(imagePath)
-	var out *gousb.OutEndpoint
 	// printer := "tcp:192.168.100.151:9100"
 	// printer := "usb:/dev/usb/lp1"
 	var w *bufio.ReadWriter
@@ -65,53 +43,56 @@ func PrintImg(printer *C.char, imagePath *C.char) *C.char {
 		}
 		defer f.Close()
 		w = bufio.NewReadWriter(bufio.NewReader(f), bufio.NewWriter(f))
-	} else if strings.HasPrefix(goPrinter, "int:") {
+		// } else if strings.HasPrefix(goPrinter, "int:") {
-		ctx := gousb.NewContext()
+		// 	ctx := gousb.NewContext()
-		// location := strings.TrimLeft(goPrinter, "int:")
+		// 	// location := strings.TrimLeft(goPrinter, "int:")
-		targetBus := 1
+		// 	targetBus := 1
-		targetAddr := 5
+		// 	targetAddr := 5
-		devs, err := ctx.OpenDevices(func(desc *gousb.DeviceDesc) bool {
+		// 	devs, err := ctx.OpenDevices(func(desc *gousb.DeviceDesc) bool {
-			return int(desc.Bus) == targetBus && int(desc.Address) == targetAddr
+		// 		return int(desc.Bus) == targetBus && int(desc.Address) == targetAddr
-		})
+		// 	})
-		if err != nil || len(devs) == 0 {
+		// 	if err != nil || len(devs) == 0 {
-			log.Fatal("Could not find or open the device")
+		// 		log.Fatal("Could not find or open the device")
-		}
+		// 	}
-		dev := devs[0]
+		// 	dev := devs[0]
-		defer dev.Close()
+		// 	defer dev.Close()
-		dev.SetAutoDetach(true)
+		// 	dev.SetAutoDetach(true)
 
-		// 2. Claim the default interface (usually 0 for printers)
+		// 	// 2. Claim the default interface (usually 0 for printers)
-		// Note: This may require detaching the kernel driver on Linux
+		// 	// Note: This may require detaching the kernel driver on Linux
-		intf, done, err := dev.DefaultInterface()
+		// 	intf, done, err := dev.DefaultInterface()
-		if err != nil {
+		// 	if err != nil {
-			log.Fatalf("Failed to claim interface: %v", err)
+		// 		log.Fatalf("Failed to claim interface: %v", err)
-		}
+		// 	}
-		defer done()
+		// 	defer done()
 
-		// 3. Open the Bulk Output Endpoint (usually endpoint #1 or #2)
+		// 	// 3. Open the Bulk Output Endpoint (usually endpoint #1 or #2)
-		// You may need to inspect desc.Endpoints to find the correct Bulk Out ID
+		// 	// You may need to inspect desc.Endpoints to find the correct Bulk Out ID
-		out, err = intf.OutEndpoint(1)
+		// 	out, err = intf.OutEndpoint(1)
-		if err != nil {
+		// 	if err != nil {
-			log.Fatalf("Failed to open OUT endpoint: %v", err)
+		// 		log.Fatalf("Failed to open OUT endpoint: %v", err)
-		}
+		// 	}
-		// w = bufio.NewReadWriter(bufio.NewReader(outPort), bufio.NewWriter(f))
+		// 	// w = bufio.NewReadWriter(bufio.NewReader(outPort), bufio.NewWriter(f))
-		rw := &USBReadWriter{out: out}
+		// 	rw := &USBReadWriter{out: out}
-		reader := bufio.NewReader(rw)
+		// 	reader := bufio.NewReader(rw)
-		writer := bufio.NewWriter(rw)
+		// 	writer := bufio.NewWriter(rw)
-		w = bufio.NewReadWriter(reader, writer)
+		// 	w = bufio.NewReadWriter(reader, writer)
 	}
 	prt := escpos.New(w)
 
 	prt.Init()
 	prt.SetSmooth(1)
+	prt.SetAlign("left")
+
 	err := printImg(prt, goImagePath)
 	if err != nil {
 		return NewErr(err)
 	}
+	prt.WriteRaw([]byte{0x1B, 0x64, 0x03})
 	prt.Cut()
 	prt.End()
 	w.Flush()
-	time.Sleep(100 * time.Millisecond)
+	time.Sleep(1 * time.Second)
 	return NewOk(nil)
 }
 

vo.go

@@ -10,13 +10,13 @@ import (
 )
 
 type Reply struct {
-	Status int         `json:"status"`
+	Status string      `json:"status"` // "ok", "error"
 	Err    string      `json:"err"`
 	Result interface{} `json:"result"`
 }
 
 func NewErr(err error) *C.char {
-	e := Reply{Status: 1, Err: err.Error()}
+	e := Reply{Status: "error", Err: err.Error()}
 	b, err := json.Marshal(e)
 	if err != nil {
 		log.Println("Error json.Marshal:", err.Error())
@@ -25,7 +25,7 @@ func NewErr(err error) *C.char {
 }
 
 func NewOk(data interface{}) *C.char {
-	e := Reply{Status: 0, Result: data}
+	e := Reply{Status: "ok", Result: data}
 	b, err := json.Marshal(e)
 	if err != nil {
 		log.Println("Error json.Marshal:", err.Error())