gd

package module
v0.1.0 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Mar 1, 2024 License: MIT Imports: 4 Imported by: 0

README

GD

This package implement libgd.

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func AlphaBlend 

func AlphaBlend(dst, src int) int

func ExtraVersion 

func ExtraVersion() string

func FontCacheSetup 

func FontCacheSetup() bool

func FontCacheShutdown 

func FontCacheShutdown()

func Free 

func Free(m unsafe.Pointer)

func FreeFontCache 

func FreeFontCache()

func LayerMultiply 

func LayerMultiply(dst, src int) int

func LayerOverlay 

func LayerOverlay(dst, src int) int

func MajorVersion 

func MajorVersion() int

func MinorVersion 

func MinorVersion() int

func ReleaseVersion 

func ReleaseVersion() int

func TrueColor 

func TrueColor(r, g, b uint8) int32

func TrueColorAlpha 

func TrueColorAlpha(r, g, b, a uint8) int32

TrueColorAlpha - Compose a true color value from its components.

Parameters: 

r - The red channel (0-255)
g - The green channel (0-255)
b - The blue channel (0-255)
a - The alpha channel (0-127, where 127 is fully transparent, and 0 is completely opaque).

func Version 

func Version() string

Types

type Font 

type Font struct {
	// contains filtered or unexported fields
}

Font - A font structure, containing the bitmaps of all characters in a font. Used to declare the characteristics of a font. Text-output functions expect these as their second argument, following the <gdImagePtr> argument. <gdFontGetSmall> and <gdFontGetLarge> both return one.

You can provide your own font data by providing such a structure and the associated pixel array. You can determine the width and height of a single character in a font by examining the w and h members of the structure. If you will not be creating your own fonts, you will not need to concern yourself with the rest of the components of this structure.

func (*Font) Data 

func (f *Font) Data() []byte

Data - Font data; array of characters, one row after another. Easily included in code, also easily loaded from data files.

func (*Font) Height 

func (f *Font) Height() int

Height - Character height

func (*Font) Offset 

func (f *Font) Offset() int

Offset - First character is numbered... (usually 32 = space)

func (*Font) TotalChars 

func (f *Font) TotalChars() int

TotalChars - # of characters in font

func (*Font) Width 

func (f *Font) Width() int

Width - Character width

type HeifChroma 

type HeifChroma string

HeifChroma - HEIF Chroma Subsampling : Values that select the HEIF chroma subsampling.

func (HeifChroma) C 

func (v HeifChroma) C() C.gdHeifChroma

C - Convert to type C.gdHeifChroma

type HeifCodec 

type HeifCodec int

HeifCodec - HEIF Coding Format : Values that select the HEIF coding format. 

const (
	HeifCodecUnknown HeifCodec = C.GD_HEIF_CODEC_UNKNOWN
	HeifCodecHEVC    HeifCodec = C.GD_HEIF_CODEC_HEVC
	HeifCodecAV1     HeifCodec = C.GD_HEIF_CODEC_AV1
)

func (HeifCodec) C 

func (v HeifCodec) C() C.gdHeifCodec

C - Convert to type C.gdHeifCodec

type Image 

type Image struct {
	// contains filtered or unexported fields
}

Image - The data structure in which gd stores images. <gdImageCreate>, <gdImageCreateTrueColor> and the various image file-loading functions return a pointer to this type, and the other functions expect to receive a pointer to this type as their first argument.

func Create 

func Create(width, height int) *Image

Create - Creates a palette-based image (up to 256 colors).

func CreateFromAvif 

func CreateFromAvif(data []byte) *Image

CreateFromAvif - Creates an image by decoding a AVIF file from a byte slice.

func CreateFromBmp 

func CreateFromBmp(data []byte) *Image

CreateFromBmp - Creates an image by decoding a BMP file from a byte slice.

func CreateFromGd 

func CreateFromGd(data []byte) *Image

CreateFromGd - Creates an image by decoding a GD file from a byte slice.

func CreateFromGd2 

func CreateFromGd2(data []byte) *Image

CreateFromGd2 - Creates an image by decoding a GD2 file from a byte slice.

func CreateFromGd2Part 

func CreateFromGd2Part(data []byte, x, y, w, h int) *Image

CreateFromGd2Part - Creates an part image by decoding a GD2 file from a byte slice.

func CreateFromGif 

func CreateFromGif(data []byte) *Image

CreateFromGif - Creates an image by decoding a GIF file from a byte slice.

func CreateFromHeif 

func CreateFromHeif(data []byte) *Image

CreateFromHeif - Creates an image by decoding a HEIF file from a byte slice.

func CreateFromJpeg 

func CreateFromJpeg(data []byte) *Image

CreateFromJpeg - Creates an image by decoding a JPEG file from a byte slice.

func CreateFromJpegEx 

func CreateFromJpegEx(data []byte, ignoreWarning bool) *Image

CreateFromJpegEx - Creates an extended image by decoding a JPEG file from a byte slice.

func CreateFromPng 

func CreateFromPng(data []byte) *Image

func CreateFromTga 

func CreateFromTga(data []byte) *Image

CreateFromTga - Creates an image by decoding a TGA file from a byte slice.

func CreateFromTiff 

func CreateFromTiff(data []byte) *Image

CreateFromTiff - Creates an image by decoding a TIFF file from a byte slice.

func CreateFromWBMP 

func CreateFromWBMP(data []byte) *Image

CreateFromWBMP - Creates an image by decoding a WBMP file from a byte slice.

func CreateFromWebp 

func CreateFromWebp(data []byte) *Image

CreateFromWebp - Creates an image by decoding a WEBP file from a byte slice.

func CreateTrueColor 

func CreateTrueColor(width, height int) *Image

CreateTrueColor - Creates a true color image (millions of colors).

func (*Image) AABlend 

func (img *Image) AABlend()

func (*Image) AlphaBlending 

func (img *Image) AlphaBlending(alphaBlending bool)

func (*Image) Arc 

func (img *Image) Arc(cx, cy, w, h, s, e int, color int32)

func (*Image) BoundsSafe 

func (img *Image) BoundsSafe(x, y int) int

func (*Image) Char 

func (img *Image) Char(f Font, x, y, c int, color int32)

func (*Image) CharUp 

func (img *Image) CharUp(f Font, x, y, c int, color int32)

func (*Image) Clone 

func (img *Image) Clone() *Image

func (*Image) Close 

func (img *Image) Close()

func (*Image) ColorAllocate 

func (img *Image) ColorAllocate(r, g, b uint8) int32

func (*Image) ColorAllocateAlpha 

func (img *Image) ColorAllocateAlpha(r, g, b, a uint8) int32

func (*Image) ColorClosest 

func (img *Image) ColorClosest(r, g, b uint8) int32

func (*Image) ColorClosestAlpha 

func (img *Image) ColorClosestAlpha(r, g, b, a uint8) int32

func (*Image) ColorClosestHWB 

func (img *Image) ColorClosestHWB(r, g, b uint8) int32

func (*Image) ColorDeallocate 

func (img *Image) ColorDeallocate(color int32)

func (*Image) ColorExact 

func (img *Image) ColorExact(r, g, b uint8) int32

func (*Image) ColorExactAlpha 

func (img *Image) ColorExactAlpha(r, g, b, a uint8) int32

func (*Image) ColorMatch 

func (img *Image) ColorMatch(dst *Image) bool

func (*Image) ColorReplace 

func (img *Image) ColorReplace(src, dst int32) int

func (*Image) ColorReplaceArray 

func (img *Image) ColorReplaceArray(src, dst []int32) int

func (*Image) ColorReplaceThreshold 

func (img *Image) ColorReplaceThreshold(src, dst int32, threshold float64) int

func (*Image) ColorResolve 

func (img *Image) ColorResolve(r, g, b uint8) int32

func (*Image) ColorResolveAlpha 

func (img *Image) ColorResolveAlpha(r, g, b, a uint8) int32

func (*Image) ColorTransparent 

func (img *Image) ColorTransparent(color int32)

func (*Image) Copy 

func (img *Image) Copy(dst *Image, dstX, dstY, srcX, srcY, w, h int)

func (*Image) CopyMerge 

func (img *Image) CopyMerge(dst *Image, dstX, dstY, srcX, srcY, w, h, pct int)

func (*Image) CopyMergeGray 

func (img *Image) CopyMergeGray(dst *Image, dstX, dstY, srcX, srcY, w, h, pct int)

func (*Image) CopyResampled 

func (img *Image) CopyResampled(dst *Image, dstX, dstY, srcX, srcY, dstW, dstH, srcW, srcH int)

func (*Image) CopyResized 

func (img *Image) CopyResized(dst *Image, dstX, dstY, srcX, srcY, dstW, dstH, srcW, srcH int)

func (*Image) CopyRotated 

func (img *Image) CopyRotated(dst *Image, dstX, dstY float64, srcX, srcY, srcW, srcH, angle int)

func (*Image) CreatePaletteFromTrueColor 

func (img *Image) CreatePaletteFromTrueColor(ditherFlag bool, colorsWanted int) *Image

func (*Image) DashedLine 

func (img *Image) DashedLine(x1, y1, x2, y2 int, color int32)

func (*Image) Ellipse 

func (img *Image) Ellipse(cx, cy, w, h int, color int32)

func (*Image) Fill 

func (img *Image) Fill(x, y int, color int32)

func (*Image) FillToBorder 

func (img *Image) FillToBorder(x, y, border int, color int32)

func (*Image) FilledArc 

func (img *Image) FilledArc(cx, cy, w, h, s, e int, color int32, style int)

func (*Image) FilledEllipse 

func (img *Image) FilledEllipse(cx, cy, w, h int, color int32)

func (*Image) FilledPolygon 

func (img *Image) FilledPolygon(p *Point, n, c int)

func (*Image) FilledRectangle 

func (img *Image) FilledRectangle(x1, y1, x2, y2 int, color int32)

func (*Image) GetClip 

func (img *Image) GetClip() (x1, y1, x2, y2 int)

func (*Image) GetColorsTotal 

func (img *Image) GetColorsTotal() int

func (*Image) GetPalettePixel 

func (img *Image) GetPalettePixel(x, y int) int32

func (*Image) GetResolutionX 

func (img *Image) GetResolutionX() uint

func (*Image) GetResolutionY 

func (img *Image) GetResolutionY() uint

func (*Image) GetTransparent 

func (img *Image) GetTransparent() uint8

func (*Image) GetTrueColorPixel 

func (img *Image) GetTrueColorPixel(x, y int) int32

func (*Image) Height 

func (img *Image) Height() int

func (*Image) IsInterlaced 

func (img *Image) IsInterlaced() bool

func (*Image) IsTrueColor 

func (img *Image) IsTrueColor() bool

func (*Image) Line 

func (img *Image) Line(x1, y1, x2, y2 int, color int32)

func (*Image) OpenPolygon 

func (img *Image) OpenPolygon(p *Point, n, c int)

func (*Image) PaletteCopy 

func (img *Image) PaletteCopy(dst *Image)

func (*Image) PaletteToTrueColor 

func (img *Image) PaletteToTrueColor() int

func (*Image) Polygon 

func (img *Image) Polygon(p *Point, n, c int)

func (*Image) Rectangle 

func (img *Image) Rectangle(x1, y1, x2, y2 int, color int32)

func (*Image) SaveAlpha 

func (img *Image) SaveAlpha(saveAlpha bool)

func (*Image) SetClip 

func (img *Image) SetClip(x1, y1, x2, y2 int)

func (*Image) SetPixel 

func (img *Image) SetPixel(x, y int, color int32)

func (*Image) SetResolution 

func (img *Image) SetResolution(x, y uint)

func (*Image) String 

func (img *Image) String(f Font, x, y int, s string, color int32)

func (*Image) String16 

func (img *Image) String16(f Font, x, y int, s string, color int32)

func (*Image) StringFT 

func (img *Image) StringFT(fg int, fontList string, size, angle float64, x, y int, text string) ([]int, error)

func (*Image) StringTTF 

func (img *Image) StringTTF(fg int, fontList string, size, angle float64, x, y int, text string) ([]int, error)

func (*Image) StringUp 

func (img *Image) StringUp(f Font, x, y int, s string, color int32)

func (*Image) StringUp16 

func (img *Image) StringUp16(f Font, x, y int, s string, color int32)

func (*Image) ToAVIF 

func (img *Image) ToAVIF() []byte

func (*Image) ToAVIFEx 

func (img *Image) ToAVIFEx(quality, speed int) []byte

func (*Image) ToBMP 

func (img *Image) ToBMP(compression int) []byte

func (*Image) ToGD 

func (img *Image) ToGD() []byte

func (*Image) ToGD2 

func (img *Image) ToGD2(cs, fmt int) []byte

func (*Image) ToGIF 

func (img *Image) ToGIF() []byte

func (*Image) ToHEIF 

func (img *Image) ToHEIF() []byte

func (*Image) ToHEIFEx 

func (img *Image) ToHEIFEx(quality int, codec HeifCodec, chroma HeifChroma) []byte

func (*Image) ToJPEG 

func (img *Image) ToJPEG(quality int) []byte

func (*Image) ToPNG 

func (img *Image) ToPNG() []byte

func (*Image) ToPNGEx 

func (img *Image) ToPNGEx(level int) []byte

func (*Image) ToTIFF 

func (img *Image) ToTIFF() []byte

func (*Image) ToWBMP 

func (img *Image) ToWBMP(fg int) []byte

func (*Image) ToWEBP 

func (img *Image) ToWEBP() []byte

func (*Image) ToWEBPEx 

func (img *Image) ToWEBPEx(quantization int) []byte

func (*Image) TrueColorToPalette 

func (img *Image) TrueColorToPalette(ditherFlag bool, colorsWanted int) int

func (*Image) TrueColorToPaletteSetMethod 

func (img *Image) TrueColorToPaletteSetMethod(method, speed int) int

func (*Image) TrueColorToPaletteSetQuality 

func (img *Image) TrueColorToPaletteSetQuality(minQuality, maxQuality int)

func (*Image) Width 

func (img *Image) Width() int

type Point 

type Point struct {
	// contains filtered or unexported fields
}

Point - Represents a point in the coordinate space of the image; used by <gdImagePolygon>, <gdImageOpenPolygon> and <gdImageFilledPolygon> for polygon drawing.

func NewPoint 

func NewPoint(x, y int) *Point

NewPoint - Create a new Point

func (*Point) X 

func (p *Point) X() int

X - Floating point position (increase from left to right).

func (*Point) Y 

func (p *Point) Y() int

Y - Floating point Row position (increase from top to bottom).

type PointF 

type PointF struct {
	// contains filtered or unexported fields
}

PointF - Defines a point in a 2D coordinate system using floating point values.

func NewPointF 

func NewPointF(x, y float64) *PointF

NewPointF - Create a new PointF

func (*PointF) X 

func (p *PointF) X() float64

X - Floating point position (increase from left to right).

func (*PointF) Y 

func (p *PointF) Y() float64

Y - Floating point Row position (increase from top to bottom).

type Rect 

type Rect struct {
	// contains filtered or unexported fields
}

Rect - A rectangle in the coordinate space of the image.

func NewRect 

func NewRect(x, y, w, h int) *Rect

NewRect - Create a new Rect

func (*Rect) Height 

func (r *Rect) Height() int

Height - The height.

func (*Rect) Width 

func (r *Rect) Width() int

Width - The width.

func (*Rect) X 

func (r *Rect) X() int

X - The x-coordinate of the upper left corner.

func (*Rect) Y 

func (r *Rect) Y() int

Y - The y-coordinate of the upper left corner.

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.