canvas

package

v0.0.1-alpha.15 Latest Latest Go to latest Published: May 8, 2022 License: MIT Imports: 8 Imported by: 0

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Repository

github.com/lvisei/go-kriging

Documentation ¶

Index ¶

func ImageResize(input image.Image, width uint, height uint) image.Image
func ImageRound(input image.Image) image.Image
func LoadLocalFont(fontPath string, fontSize float64) (font.Face, error)
func LoadLocalImage(imagePath string) (image.Image, error)
type Canvas
type TextConfig

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func ImageResize ¶

func ImageResize(input image.Image, width uint, height uint) image.Image

ImageResize 图片缩放

func ImageRound ¶

func ImageRound(input image.Image) image.Image

ImageRound 图片变圆

func LoadLocalFont ¶

func LoadLocalFont(fontPath string, fontSize float64) (font.Face, error)

LoadLocalFont 字体缓存在内存中

func LoadLocalImage ¶

func LoadLocalImage(imagePath string) (image.Image, error)

LoadLocalImage 本地图片缓存在内存中

Types ¶

type Canvas ¶

type Canvas struct {
	Width  uint
	Height uint
	// contains filtered or unexported fields
}

Canvas 画布

func NewCanvas ¶

func NewCanvas(width, height int) *Canvas

NewCanvas 创建新的画布

func NewCanvasWithImage ¶

func NewCanvasWithImage(background image.Image) *Canvas

NewCanvasWithImage 从图片创建新的画布

func NewCanvasWithLocalImagePath ¶

func NewCanvasWithLocalImagePath(imagePath string) (*Canvas, error)

NewCanvasWithLocalImagePath 从本地图片创建新的画布

func (*Canvas) DrawImage ¶

func (canvas *Canvas) DrawImage(img image.Image, offsetX int, offsetY int)

DrawImage 绘制图片

func (*Canvas) DrawLine ¶

func (canvas *Canvas) DrawLine(color color.Color, offsetX, offsetY, length float64)

DrawLine 绘制横线

func (*Canvas) DrawRect ¶

func (canvas *Canvas) DrawRect(x, y, w, h float64, c color.Color)

DrawRect 绘制矩形

func (*Canvas) DrawText ¶

func (canvas *Canvas) DrawText(opt *TextConfig) error

DrawText 绘制图片

func (*Canvas) MeasureString ¶

func (canvas *Canvas) MeasureString(opt *TextConfig) float64

MeasureString 测量文字

func (*Canvas) Output ¶

func (canvas *Canvas) Output() ([]byte, error)

Output 输出 PNG 图片

func (*Canvas) SavePNG ¶

func (canvas *Canvas) SavePNG(path string) error

SavePNG 保存 PNG 图片

type TextConfig ¶

type TextConfig struct {
	Text     string
	FontName string
	FontSize float64
	Color    color.Color
	OffsetX  float64
	OffsetY  float64
	AlignX   float64
	AlignY   float64
	MaxWidth float64
}

TextConfig 绘制文字配置

Source Files ¶

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