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v2.3.1 Latest Latest
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Published: Feb 13, 2023 License: BSD-3-Clause Imports: 6 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

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var NoTexture = TextureType(0)

NoTexture used when there is no valid texture

Functions

func Clean added in v2.1.0

func Clean(canvasRefreshed bool)

Clean run cache clean task, it should be called on paint events.

func CleanCanvas added in v2.1.0

func CleanCanvas(canvas fyne.Canvas)

CleanCanvas performs a complete remove of all the objects that belong to the specified canvas. Usually used to free all objects from a closing windows.

func CleanCanvases added in v2.1.1

func CleanCanvases(refreshingCanvases []fyne.Canvas)

CleanCanvases runs cache clean tasks for canvases that are being refreshed. This is called on paint events.

func DeleteTexture added in v2.1.0

func DeleteTexture(obj fyne.CanvasObject)

DeleteTexture deletes the texture from the cache map.

func DestroyRenderer

func DestroyRenderer(wid fyne.Widget)

DestroyRenderer frees a render implementation for a widget. This is typically for internal use only.

func GetCanvasForObject added in v2.1.0

func GetCanvasForObject(obj fyne.CanvasObject) fyne.Canvas

GetCanvasForObject returns the canvas for the specified object.

func GetFontMetrics added in v2.1.0

func GetFontMetrics(text string, fontSize float32, style fyne.TextStyle) (size fyne.Size, base float32)

GetFontMetrics looks up a calculated size and baseline required for the specified text parameters.

func GetSvg added in v2.1.0

func GetSvg(name string, w int, h int) *image.NRGBA

GetSvg gets svg image from cache if it exists.

func IsRendered

func IsRendered(wid fyne.Widget) bool

IsRendered returns true of the widget currently has a renderer. One will be created the first time a widget is shown but may be removed after it is hidden.

func IsValid added in v2.2.0

func IsValid(texture TextureType) bool

IsValid will return true if the passed texture is potentially a texture

func RangeExpiredTexturesFor added in v2.1.0

func RangeExpiredTexturesFor(canvas fyne.Canvas, f func(fyne.CanvasObject))

RangeExpiredTexturesFor range over the expired textures for the specified canvas.

Note: If this is used to free textures, then it should be called inside a current gl context to ensure textures are deleted from gl.

func RangeTexturesFor added in v2.1.0

func RangeTexturesFor(canvas fyne.Canvas, f func(fyne.CanvasObject))

RangeTexturesFor range over the textures for the specified canvas.

Note: If this is used to free textures, then it should be called inside a current gl context to ensure textures are deleted from gl.

func Renderer

func Renderer(wid fyne.Widget) fyne.WidgetRenderer

Renderer looks up the render implementation for a widget

func ResetThemeCaches added in v2.1.0

func ResetThemeCaches()

ResetThemeCaches clears all the svg and text size cache maps

func SetCanvasForObject added in v2.1.0

func SetCanvasForObject(obj fyne.CanvasObject, canvas fyne.Canvas)

SetCanvasForObject sets the canvas for the specified object.

func SetFontMetrics added in v2.1.0

func SetFontMetrics(text string, fontSize float32, style fyne.TextStyle, size fyne.Size, base float32)

SetFontMetrics stores a calculated font size and baseline for parameters that were missing from the cache.

func SetSvg added in v2.1.0

func SetSvg(name string, pix *image.NRGBA, w int, h int)

SetSvg sets a svg into the cache map.

func SetTexture added in v2.1.0

func SetTexture(obj fyne.CanvasObject, texture TextureType, canvas fyne.Canvas)

SetTexture sets cached texture.

Types

type TextureType added in v2.1.0

type TextureType = uint32

TextureType represents an uploaded GL texture

func GetTexture added in v2.1.0

func GetTexture(obj fyne.CanvasObject) (TextureType, bool)

GetTexture gets cached texture.

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