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Go bingings for GD (http://www.boutell.com/gd/)

Go bingings for GD http://bolknote.ru Evgeny Stepanischev [email protected] Installation: 1. install libgd (https://libgd.github.io/) 2. just run "go get github.com/bolknote/go-gd" For test you can run sample.go (go run sample.jpg)
Information
Category: Golang / Images
Watchers: 5
Star: 57
Fork: 17
Last update: Jan 19, 2023
Resource links
https://github.com/bolknote/go-gd
Go bingings for GD
http://bolknote.ru
Evgeny Stepanischev
[email protected]

Installation:
    1. install libgd (https://libgd.github.io/)
    2. just run "go get github.com/bolknote/go-gd"

For test you can run sample.go (go run sample.jpg)
1 Open More issues
Closed

run `go build` error

Hi,

I'm recently working on processing images with go and this gd lib.

But I found errors during running go build like following,

looks like the linker hasn't found the proper lib file.

but passing -ldflags "-lgd" won't work.

What should I do building this library?

thanks!

# _/tmp/go-gd
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdFontCacheSetup':
./gd.go:62: undefined reference to `gdFontCacheSetup'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdFontGetGiant':
./gd.go:80: undefined reference to `gdFontGetGiant'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdFontGetLarge':
./gd.go:89: undefined reference to `gdFontGetLarge'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdFontGetMediumBold':
./gd.go:98: undefined reference to `gdFontGetMediumBold'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdFontGetSmall':
./gd.go:107: undefined reference to `gdFontGetSmall'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdFontGetTiny':
./gd.go:116: undefined reference to `gdFontGetTiny'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageArc':
./gd.go:153: undefined reference to `gdImageArc'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorAllocate':
./gd.go:196: undefined reference to `gdImageColorAllocate'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorAllocateAlpha':
./gd.go:211: undefined reference to `gdImageColorAllocateAlpha'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorClosest':
./gd.go:226: undefined reference to `gdImageColorClosest'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorClosestAlpha':
./gd.go:241: undefined reference to `gdImageColorClosestAlpha'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorClosestHWB':
./gd.go:256: undefined reference to `gdImageColorClosestHWB'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorExact':
./gd.go:282: undefined reference to `gdImageColorExact'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorExactAlpha':
./gd.go:297: undefined reference to `gdImageColorExactAlpha'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorResolve':
./gd.go:312: undefined reference to `gdImageColorResolve'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorResolveAlpha':
./gd.go:327: undefined reference to `gdImageColorResolveAlpha'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCopy':
./gd.go:354: undefined reference to `gdImageCopy'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCopyMerge':
./gd.go:372: undefined reference to `gdImageCopyMerge'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCopyMergeGray':
./gd.go:390: undefined reference to `gdImageCopyMergeGray'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCopyResampled':
./gd.go:408: undefined reference to `gdImageCopyResampled'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCopyResized':
./gd.go:426: undefined reference to `gdImageCopyResized'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCopyRotated':
./gd.go:444: undefined reference to `gdImageCopyRotated'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreate':
./gd.go:455: undefined reference to `gdImageCreate'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreateFromGif':
./gd.go:465: undefined reference to `gdImageCreateFromGif'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreateFromJpeg':
./gd.go:475: undefined reference to `gdImageCreateFromJpeg'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreateFromPng':
./gd.go:485: undefined reference to `gdImageCreateFromPng'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreateFromWBMP':
./gd.go:495: undefined reference to `gdImageCreateFromWBMP'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreateFromXbm':
./gd.go:505: undefined reference to `gdImageCreateFromXbm'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreateFromXpm':
./gd.go:515: undefined reference to `gdImageCreateFromXpm'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCreateTrueColor':
./gd.go:526: undefined reference to `gdImageCreateTrueColor'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageFilledArc':
./gd.go:593: undefined reference to `gdImageFilledArc'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageGetPixel':
./gd.go:648: undefined reference to `gdImageGetPixel'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSquareToCircle':
./gd.go:867: undefined reference to `gdImageSquareToCircle'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageStringFT':
./gd.go:901: undefined reference to `gdImageStringFT'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdFontCacheShutdown':
./gd.go:71: undefined reference to `gdFontCacheShutdown'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageAABlend':
./gd.go:125: undefined reference to `gdImageAABlend'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageAlphaBlending':
./gd.go:136: undefined reference to `gdImageAlphaBlending'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageChar':
./gd.go:167: undefined reference to `gdImageChar'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageCharUp':
./gd.go:181: undefined reference to `gdImageCharUp'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorDeallocate':
./gd.go:267: undefined reference to `gdImageColorDeallocate'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageColorTransparent':
./gd.go:338: undefined reference to `gdImageColorTransparent'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageDashedLine':
./gd.go:541: undefined reference to `gdImageDashedLine'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageDestroy':
./gd.go:550: undefined reference to `gdImageDestroy'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageFill':
./gd.go:563: undefined reference to `gdImageFill'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageFillToBorder':
./gd.go:576: undefined reference to `gdImageFillToBorder'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageFilledEllipse':
./gd.go:608: undefined reference to `gdImageFilledEllipse'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageFilledPolygon':
./gd.go:620: undefined reference to `gdImageFilledPolygon'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageFilledRectangle':
./gd.go:635: undefined reference to `gdImageFilledRectangle'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageGif':
./gd.go:658: undefined reference to `gdImageGif'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageInterlace':
./gd.go:669: undefined reference to `gdImageInterlace'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageJpeg':
./gd.go:681: undefined reference to `gdImageJpeg'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageLine':
./gd.go:696: undefined reference to `gdImageLine'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageOpenPolygon':
./gd.go:708: undefined reference to `gdImageOpenPolygon'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImagePaletteCopy':
./gd.go:718: undefined reference to `gdImagePaletteCopy'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImagePng':
./gd.go:728: undefined reference to `gdImagePng'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImagePolygon':
./gd.go:740: undefined reference to `gdImagePolygon'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageRectangle':
./gd.go:755: undefined reference to `gdImageRectangle'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSaveAlpha':
./gd.go:766: undefined reference to `gdImageSaveAlpha'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSetAntiAliased':
./gd.go:777: undefined reference to `gdImageSetAntiAliased'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSetAntiAliasedDontBlend':
./gd.go:788: undefined reference to `gdImageSetAntiAliasedDontBlend'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSetBrush':
./gd.go:798: undefined reference to `gdImageSetBrush'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSetPixel':
./gd.go:811: undefined reference to `gdImageSetPixel'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSetStyle':
./gd.go:823: undefined reference to `gdImageSetStyle'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSetThickness':
./gd.go:834: undefined reference to `gdImageSetThickness'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSetTile':
./gd.go:844: undefined reference to `gdImageSetTile'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageSharpen':
./gd.go:855: undefined reference to `gdImageSharpen'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageString':
./gd.go:882: undefined reference to `gdImageString'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageStringUp':
./gd.go:916: undefined reference to `gdImageStringUp'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageTrueColorToPalette':
./gd.go:927: undefined reference to `gdImageTrueColorToPalette'
/tmp/go-build529644233/_/tmp/go-gd/_obj/gd.cgo2.o: In function `_cgo_a69468c695dd_Cfunc_gdImageWBMP':
./gd.go:939: undefined reference to `gdImageWBMP'
collect2: ld returned 1 exit status
opened Aug 20, 2012 by sp3c73r2038 8
Closed

Build error: cannot use quantization (type int) as type _Ctype_int in argument to func literal

https://github.com/bolknote/go-gd/blob/3320b6f6dd260b1e8f7d86aaaceafb98ea4ba96d/gd.go#L118

And with buf := C.gdImageWebpPtrEx(p.img, pimgSize, C.int(quantization)) build OK

go version go1.10 darwin/amd64

opened May 7, 2018 by AntonPates 1
Closed

Using Polygon Functions

Greetings,

I am attempting to use the Polygon functions with the following code:

var points = []struct {
        x int
        y int
}{
        {2, 2},
        {2500, 2500},
        {250, 4000},
        {20, 100},
}
pict.FilledPolygon(points, white)

With go 1.10, I receive the following error upon go run main.go:

./main.go:24:20: cannot use points (type []struct { x int; y int }) as type []struct { gd.x int; gd.y int } in argument to pict.FilledPolygon

What is the correct way to pass points to these functions? Thanks for any help you may be able to provide.

opened Mar 29, 2018 by brockwood 1
Closed

incompatible pointer types passing

I have error return as:

cgo-gcc-prolog:922:30: warning: incompatible pointer types passing 'struct (anonymous struct at cgo-gcc-prolog:917:3)

so when I remove:

func (p *Image) Polygon(points [](struct{ x, y int }), c Color) {
	C.gdImagePolygon(p.img, (C.gdPointPtr)(Pointer(&points)), C.int(len(points)), C.int(c))
}

func (p *Image) OpenPolygon(points [](struct{ x, y int }), c Color) {
	C.gdImageOpenPolygon(p.img, (C.gdPointPtr)(Pointer(&points)), C.int(len(points)), C.int(c))
}

func (p *Image) FilledPolygon(points [](struct{ x, y int }), c Color) {
	C.gdImageFilledPolygon(p.img, (C.gdPointPtr)(Pointer(&points)), C.int(len(points)), C.int(c))
}

go version:

go1.8 darwin/amd64

it's run ok. Can you fix it ?

opened May 28, 2017 by huyhvq 1
Closed

can not build on msys2 

pacman -Q | grep libgd
mingw-w64-i686-libgd 2.2.5-1

# github.com/bolknote/go-gd
..\.gopath\src\github.com\bolknote\go-gd\gd.go:655:16: type [1073741824]_Ctype_struct___1 larger than address space
..\.gopath\src\github.com\bolknote\go-gd\gd.go:655:16: type [1073741824]_Ctype_struct___1 too large
..\.gopath\src\github.com\bolknote\go-gd\gd.go:667:188: cannot use gdpoints (type _Ctype_gdPointPtr) as type *_Ctype_struct___3 in argument to func literal
..\.gopath\src\github.com\bolknote\go-gd\gd.go:674:192: cannot use gdpoints (type _Ctype_gdPointPtr) as type *_Ctype_struct___3 in argument to func literal
..\.gopath\src\github.com\bolknote\go-gd\gd.go:681:194: cannot use gdpoints (type _Ctype_gdPointPtr) as type *_Ctype_struct___3 in argument to func literal

gg works but pictures generated is much larger than gd (8x).

opened Sep 5, 2018 by ghost 0
Closed

can not build on win7 x64 

# github.com/bolknote/go-gd
..\.gopath\src\github.com\bolknote\go-gd\gd.go:655:16: type [1073741824]_Ctype_struct___1 larger than address space
..\.gopath\src\github.com\bolknote\go-gd\gd.go:655:16: type [1073741824]_Ctype_struct___1 too large
..\.gopath\src\github.com\bolknote\go-gd\gd.go:667:188: cannot use gdpoints (type _Ctype_gdPointPtr) as type *_Ctype_struct___3 in argument to func literal
..\.gopath\src\github.com\bolknote\go-gd\gd.go:674:192: cannot use gdpoints (type _Ctype_gdPointPtr) as type *_Ctype_struct___3 in argument to func literal
..\.gopath\src\github.com\bolknote\go-gd\gd.go:681:194: cannot use gdpoints (type _Ctype_gdPointPtr) as type *_Ctype_struct___3 in argument to func literal

go version
go version go1.11 windows/386
opened Aug 27, 2018 by ghost 0
Open

StringFT is suboptimal

In current implementation (which I believe partially follows PHP extension) StringFT initialize and destroy font cache on every call, which is OK if this function is used infrequently. But if StringFT is heavily used, then init/deinit of cache on every call is a waste. Moreover, cache is global in libgd, so init/deint of the cache in StringFT makes StringFT thread-unsafe.

I think, it would be handy to have option to control font cache manually, and provide another interface to the gdImageStringFT, which works with pre-initialized cache.

As a simpler option, according to the libgd docs, gdFontCacheSetup/gdFontCacheShutdown can be just omitted from StringFT, as gdImageStringFT will setup font cache if it is not yet initialized.

opened Apr 14, 2021 by antst 0

Contents

    nbari web server for static content
    OpenSilver This repository contains the source of both OpenSilver and CSHTML5. More information is available at: www.opensilver.net and www.cshtml5.com - Read README.md for the instructions on how to build the source code and how to test it.
    highcharts Highcharts JS, the JavaScript charting framework
    highcharts Highcharts JS, the JavaScript charting framework
    craftbeerpi Brew Controller
    redstoneleo get background images from http://www.bing.com/?mkt=zh-CN and set them as the wallpaper of your PC desktop
    rickysarraf Power Savings tool for Linux
    Mamboleoo A tunnel experiment in WebGL inspired by the effect seen on http://www.fornasetti.com/](Fornasetti.
    allyoucanmap map-breaker
    mercari Go package for reporting HTTP stats
    diku-dk HTTP utility library for Standard ML
    Lapis0875 Python port of proxy-www
    nccgroup HTA encryption tool for RedTeams
    TracksApp Tracks is a GTD™ web application, built with Ruby on Rails
    alexwestco Daily, automated commits that magically turn your GitHub green
    MdIqubal Surface shader with tesselation - Tried recreating the shockwave effect in Matrix when Neo takes off.
    h2o H2O - the optimized HTTP/1, HTTP/2, HTTP/3 server
    ricardojoserf Exfiltrate files using the HTTP protocol version ("HTTP/1.0" is a 0 and "HTTP/1.1" is a 1)
    caedesvvv A dokuwiki desktop editor
    httprb HTTP (The Gem! a.k.a. http.rb) - a fast Ruby HTTP client with a chainable API, streaming support, and timeouts
    BradLarson GPUImage 3 is a BSD-licensed Swift framework for GPU-accelerated video and image processing using Metal.
    Share this repo

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