gdkpixbuf

package
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 Go to latest Published: Mar 9, 2024 License: GPL-3.0 Imports: 6 Imported by: 0

README

Go 图形处理库, 主要围绕 GdkPixbuf 库进行增强开发. 支持对图片进行 剪切, 翻转, 缩放, 混合, 模糊处理等操作.

API 的命名风格与 pkg.deepin.io/lib/graphic 库相同, 以 Blur 操作为例:

  • Blur 对 C.GdkPixbuf 对象进行模糊处理

  • BlurImage 对目标文件进行模糊处理

  • BlurImageCache 对目标文件进行模糊处理, 同时将处理后的文件放到缓 存目录, 下次对同一文件进行相同操作时可以大大提高速度

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Blur 

func Blur(pixbuf *C.GdkPixbuf, sigma, numSteps float64) (err error)

Blur generate blur effect to pixbuf object.

func BlurImage 

func BlurImage(srcFile, dstFile string, sigma, numSteps float64, f Format) (err error)

BlurImage generate blur effect to an image file.

func BlurImageCache 

func BlurImageCache(srcFile string, sigma, numSteps float64, f Format) (dstFile string, useCache bool, err error)

BlurImageCache generate and save the blurred image file to cache directory, if target file already exists, just return it.

func ClipImage 

func ClipImage(srcFile, destFile string, srcX, srcY, width, height int, f Format) (err error)

func ConvertImage 

func ConvertImage(srcFile, destFile string, f Format) (err error)

func ConvertImageToXpixmap 

func ConvertImageToXpixmap(imgFile string) (xpixmap x.Pixmap, err error)

ConvertImageToXpixmap convert image file to x pixmap.

func ConvertPixbufToXpixmap 

func ConvertPixbufToXpixmap(pixbuf *C.GdkPixbuf) (xpixmap x.Pixmap, err error)

func ConvertXpixmapToPixbuf 

func ConvertXpixmapToPixbuf(xpixmap x.Pixmap, width, height int) (pixbuf *C.GdkPixbuf, err error)

func CopyArea 

func CopyArea(srcPixbuf, destPixbuf *C.GdkPixbuf, srcX, srcY, width, height, destX, destY int) (err error)

func CopyAreaSimple 

func CopyAreaSimple(srcPixbuf *C.GdkPixbuf, srcX, srcY, width, height int) (destPixbuf *C.GdkPixbuf, err error)

func Flip 

func Flip(srcPixbuf *C.GdkPixbuf, horizontal bool) (destPixbuf *C.GdkPixbuf, err error)

func FlipImageHorizontal 

func FlipImageHorizontal(srcFile, destFile string, f Format) (err error)

func FlipImageVertical 

func FlipImageVertical(srcFile, destFile string, f Format) (err error)

func FreePixbuf 

func FreePixbuf(pixbuf *C.GdkPixbuf)

func GetDominantColor 

func GetDominantColor(pixbuf *C.GdkPixbuf) (h, s, v float64, err error)

func GetDominantColorOfImage 

func GetDominantColorOfImage(imgFile string) (h, s, v float64, err error)

GetDominantColorOfImage return the dominant hsv color of an image.

func GetImageSize 

func GetImageSize(imgFile string) (w, h int, err error)

GetImageSize return image file's width and height.

func GetPreferScaleClipRect 

func GetPreferScaleClipRect(refWidth, refHeight, imgWidth, imgHeight int) (x, y, w, h int, err error)

GetPreferScaleClipRect get the maximum rectangle in center of image which with the same scale to reference width/heigh.

func GetSize 

func GetSize(pixbuf *C.GdkPixbuf) (w, h int, err error)

GetSize return pixbuf's width and height.

func Hsv2Rgb 

func Hsv2Rgb(h, s, v float64) (r, g, b uint8)

Hsv2Rgb convert color format from HSV(h=[0..360), s,v=[0..1]) to RGB(r, g, b=[0..255]).

func InitGdk 

func InitGdk() (err error)

InitGdk initialize gdk.

func InitGdkXlib 

func InitGdkXlib() (err error)

InitGdkXlib initialize gdk and xlib, should not be used with InitGdk().

func IsSupportedImage 

func IsSupportedImage(imgFile string) bool

IsSupportedImage check if image file is supported.

func NewPixbufFromFile 

func NewPixbufFromFile(imgFile string) (pixbuf *C.GdkPixbuf, err error)

func Rgb2Hsv 

func Rgb2Hsv(r, g, b uint8) (h, s, v float64)

Rgb2Hsv convert color format from RGB(r, g, b=[0..255]) to HSV(h=[0..360), s,v=[0..1]).

func RotateImageLeft 

func RotateImageLeft(srcFile, destFile string, f Format) (err error)

func RotateImageRight 

func RotateImageRight(srcFile, destFile string, f Format) (err error)

func RotateImageUpsizedown 

func RotateImageUpsizedown(srcFile, destFile string, f Format) (err error)

func RotateSimple 

func RotateSimple(srcPixbuf *C.GdkPixbuf, angle GdkPixbufRotation) (destPixbuf *C.GdkPixbuf, err error)

func Save 

func Save(pixbuf *C.GdkPixbuf, destFile string, f Format) (err error)

func ScaleImage 

func ScaleImage(srcFile, destFile string, newWidth, newHeght int, interpType GdkInterpType, f Format) (err error)

ScaleImage returns a new image file with the given width and height created by resizing the given image.

func ScaleImageCache 

func ScaleImageCache(srcFile string, newWidth, newHeght int, interpType GdkInterpType, f Format) (destFile string, useCache bool, err error)

func ScaleImagePrefer 

func ScaleImagePrefer(srcFile, destFile string, newWidth, newHeght int, interpType GdkInterpType, f Format) (err error)

ScaleImagePrefer resize image file to new width and heigh, and maintain the original proportions unchanged.

func ScaleImagePreferCache 

func ScaleImagePreferCache(srcFile string, newWidth, newHeght int, interpType GdkInterpType, f Format) (destFile string, useCache bool, err error)

func ScalePrefer 

func ScalePrefer(srcPixbuf *C.GdkPixbuf, newWidth, newHeight int, interpType GdkInterpType) (destPixbuf *C.GdkPixbuf, err error)

ScalePrefer resize pixbuf to new width and heigh, and maintain the original proportions unchanged.

func ScaleSimple 

func ScaleSimple(srcPixbuf *C.GdkPixbuf, newWidth, newHeght int, interpType GdkInterpType) (destPixbuf *C.GdkPixbuf, err error)

func Screenshot 

func Screenshot() (pixbuf *C.GdkPixbuf, err error)

func ScreenshotImage 

func ScreenshotImage(file string, f Format) (err error)

func Thumbnail 

func Thumbnail(srcPixbuf *C.GdkPixbuf, maxWidth, maxHeight int, interpType GdkInterpType) (destPixbuf *C.GdkPixbuf, err error)

Thumbnail resize pixbuf with limited maximum width and height.

func ThumbnailImage 

func ThumbnailImage(srcFile, destFile string, maxWidth, maxHeight int, interpType GdkInterpType, f Format) (err error)

ThumbnailImage resize target image file with limited maximum width and height.

Types

type Format 

type Format string

Format defines the type of image format. 

const (
	FormatPng  Format = "png"
	FormatJpeg Format = "jpeg"
	FormatBmp  Format = "bmp"
	FormatIco  Format = "ico"
	FormatTiff Format = "tiff"
)

Registered image format.

func GetImageFormat 

func GetImageFormat(imgFile string) (f Format, err error)

GetImageFormat return image file's format, such as "png", "jpeg".

type GdkColorspace 

type GdkColorspace uint
const (
	GDK_COLORSPACE_RGB GdkColorspace = iota
)

type GdkInterpType 

type GdkInterpType uint
const (
	GDK_INTERP_NEAREST GdkInterpType = iota
	GDK_INTERP_TILES
	GDK_INTERP_BILINEAR
	GDK_INTERP_HYPER
)

type GdkPixbufAlphaMode 

type GdkPixbufAlphaMode uint
const (
	GDK_PIXBUF_ALPHA_BILEVEL GdkPixbufAlphaMode = iota
	GDK_PIXBUF_ALPHA_FULL
)

type GdkPixbufError 

type GdkPixbufError uint
const (
	/* image data hosed */
	GDK_PIXBUF_ERROR_CORRUPT_IMAGE GdkPixbufError = iota
	/* no mem to load image */
	GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
	/* bad option passed to save routine */
	GDK_PIXBUF_ERROR_BAD_OPTION
	/* unsupported image type (sort of an ENOSYS) */
	GDK_PIXBUF_ERROR_UNKNOWN_TYPE
	/* unsupported operation (load, save) for image type */
	GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION
	GDK_PIXBUF_ERROR_FAILED
)

type GdkPixbufRotation 

type GdkPixbufRotation uint
const (
	GDK_PIXBUF_ROTATE_NONE             GdkPixbufRotation = 0
	GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE GdkPixbufRotation = 90
	GDK_PIXBUF_ROTATE_UPSIDEDOWN       GdkPixbufRotation = 180
	GDK_PIXBUF_ROTATE_CLOCKWISE        GdkPixbufRotation = 270
)

type GdkPixdataDumpType 

type GdkPixdataDumpType uint
const (
	/* type of source to save */
	GDK_PIXDATA_DUMP_PIXDATA_STREAM GdkPixdataDumpType = 0
	GDK_PIXDATA_DUMP_PIXDATA_STRUCT GdkPixdataDumpType = 1
	GDK_PIXDATA_DUMP_MACROS         GdkPixdataDumpType = 2
	/* type of variables to use */
	GDK_PIXDATA_DUMP_GTYPES GdkPixdataDumpType = 0
	GDK_PIXDATA_DUMP_CTYPES GdkPixdataDumpType = 1 << 8
	GDK_PIXDATA_DUMP_STATIC GdkPixdataDumpType = 1 << 9
	GDK_PIXDATA_DUMP_CONST  GdkPixdataDumpType = 1 << 10
	/* save RLE decoder macro? */
	GDK_PIXDATA_DUMP_RLE_DECODER GdkPixdataDumpType = 1 << 16
)

type GdkPixdataType 

type GdkPixdataType uint
const (
	/* colorspace + alpha */
	GDK_PIXDATA_COLOR_TYPE_RGB  GdkPixdataType = 0x01
	GDK_PIXDATA_COLOR_TYPE_RGBA GdkPixdataType = 0x02
	GDK_PIXDATA_COLOR_TYPE_MASK GdkPixdataType = 0xff
	/* width, support 8bits only currently */
	GDK_PIXDATA_SAMPLE_WIDTH_8    GdkPixdataType = 0x01 << 16
	GDK_PIXDATA_SAMPLE_WIDTH_MASK GdkPixdataType = 0x0f << 16
	/* encoding */
	GDK_PIXDATA_ENCODING_RAW  GdkPixdataType = 0x01 << 24
	GDK_PIXDATA_ENCODING_RLE  GdkPixdataType = 0x02 << 24
	GDK_PIXDATA_ENCODING_MASK GdkPixdataType = 0x0f << 24
)

Source Files

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