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thorvg

package module

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Versions in this module

v1

v1.0.7

Jul 3, 2026

v1.0.6

Jun 6, 2026

Changes in this version

type Animation

+ func (animation Animation) SetAudioResolver(resolver AudioResolver) error

+ type AudioInfo struct

+ Active bool

+ Embedded bool

+ MimeType string

+ Offset float32

+ Size uint32

+ Src string

+ Volume float32

+ type AudioResolver func(info AudioInfo)

type EngineOption

+ const TVG_ENGINE_OPTION_ALIASED

v1.0.5

May 15, 2026

Changes in this version

+ func AccessorGenerateId(name string) uint

+ func EngineInit(threads int) error

+ func EngineTerm() error

+ func FontLoad(path string) error

+ func FontLoadData(name string, data []byte, mimetype string) error

+ func FontUnload(path string) error

+ func FontUnloadData(name string) error

+ func SetErrorHandler(handler func(err ResultError)) func(err ResultError)

+ func Version() (int, int, int, string, string, error)

+ type Accessor uintptr

+ func AccessorNew() Accessor

+ func (accessor Accessor) Del() error

+ func (accessor Accessor) GetName(id uint) string

+ func (accessor Accessor) Set(paint Paint, func_ func(paint Paint) bool) error

+ type Animation uintptr

+ func AnimationNew() Animation

+ func LottieAnimationNew() Animation

+ func (animation Animation) AnimationGenSlot(slot string) uint32

+ func (animation Animation) ApplySlot(id uint) error

+ func (animation Animation) Assign(layer string, ix uint, var_ string, val float32) error

+ func (animation Animation) Del() error

+ func (animation Animation) DelSlot(id uint) error

+ func (animation Animation) GetDuration() (float32, error)

+ func (animation Animation) GetFrame() (float32, error)

+ func (animation Animation) GetMarker(idx uint) (string, error)

+ func (animation Animation) GetMarkerInfo(idx uint) (string, float32, float32, error)

+ func (animation Animation) GetMarkersCnt() (uint, error)

+ func (animation Animation) GetPicture() Picture

+ func (animation Animation) GetSegment() (float32, float32, error)

+ func (animation Animation) GetTotalFrame() (float32, error)

+ func (animation Animation) SetFrame(no float32) error

+ func (animation Animation) SetMarker(marker string) error

+ func (animation Animation) SetQuality(value uint) error

+ func (animation Animation) SetSegment(begin float32, end float32) error

+ func (animation Animation) Tween(from float32, to float32, progress float32) error

+ type BlendMethod enum

+ const BLEND_METHOD_ADD

+ const BLEND_METHOD_COLOR

+ const BLEND_METHOD_COLORBURN

+ const BLEND_METHOD_COLORDODGE

+ const BLEND_METHOD_COMPOSITION

+ const BLEND_METHOD_DARKEN

+ const BLEND_METHOD_DIFFERENCE

+ const BLEND_METHOD_EXCLUSION

+ const BLEND_METHOD_HARDLIGHT

+ const BLEND_METHOD_HUE

+ const BLEND_METHOD_LIGHTEN

+ const BLEND_METHOD_LUMINOSITY

+ const BLEND_METHOD_MULTIPLY

+ const BLEND_METHOD_NORMAL

+ const BLEND_METHOD_OVERLAY

+ const BLEND_METHOD_SATURATION

+ const BLEND_METHOD_SCREEN

+ const BLEND_METHOD_SOFTLIGHT

+ type Canvas struct

+ func GlCanvasCreate(option EngineOption) Canvas

+ func SwCanvasCreate(option EngineOption) Canvas

+ func (canvas *Canvas) Destroy() error

+ func (canvas *Canvas) GlSetTarget(display unsafe.Pointer, surface unsafe.Pointer, context unsafe.Pointer, id int, ...) error

+ func (canvas *Canvas) SwSetTarget(stride uint, width uint, height uint, cs ColorSpace) error

+ func (canvas Canvas) Add(paint Paint) error

+ func (canvas Canvas) Buffer() []byte

+ func (canvas Canvas) Draw(clear_ bool) error

+ func (canvas Canvas) Insert(target Paint, paint Paint) error

+ func (canvas Canvas) Remove(paint Paint) error

+ func (canvas Canvas) SetViewport(x int, y int, width int, height int) error

+ func (canvas Canvas) Sync() error

+ func (canvas Canvas) Update(Paint) error

+ type ColorSpace enum

+ const COLORSPACE_ABGR8888

+ const COLORSPACE_ABGR8888S

+ const COLORSPACE_ARGB8888

+ const COLORSPACE_ARGB8888S

+ const COLORSPACE_UNKNOWN

+ type ColorStop struct

+ A uint8

+ B uint8

+ G uint8

+ Offset float32

+ R uint8

+ type EngineOption enum

+ const ENGINE_OPTION_DEFAULT

+ const ENGINE_OPTION_NONE

+ const ENGINE_OPTION_SMART_RENDER

+ type FillRule enum

+ const FILL_RULE_EVEN_ODD

+ const FILL_RULE_NON_ZERO

+ type FilterMethod enum

+ const FILTER_METHOD_BILINEAR

+ const FILTER_METHOD_NEAREST

+ type GlyphMetrics struct

+ Advance float32

+ Bearing float32

+ Max Point

+ Min Point

+ type Gradient interface

+ type LinearGradient struct

+ func LinearGradientNew() LinearGradient

+ func (gradient LinearGradient) Del() error

+ func (gradient LinearGradient) Duplicate() LinearGradient

+ func (gradient LinearGradient) Get() (float32, float32, float32, float32, error)

+ func (gradient LinearGradient) GetColorStops() ([]ColorStop, error)

+ func (gradient LinearGradient) GetSpread() (StrokeFill, error)

+ func (gradient LinearGradient) GetTransform() (Matrix, error)

+ func (gradient LinearGradient) GetType() (Type, error)

+ func (gradient LinearGradient) Set(x1 float32, y1 float32, x2 float32, y2 float32) error

+ func (gradient LinearGradient) SetColorStops(colorStops []ColorStop) error

+ func (gradient LinearGradient) SetSpread(spread StrokeFill) error

+ func (gradient LinearGradient) SetTransform(matrix Matrix) error

+ type MaskMethod enum

+ const MASK_METHOD_ADD

+ const MASK_METHOD_ALPHA

+ const MASK_METHOD_DARKEN

+ const MASK_METHOD_DIFFERENCE

+ const MASK_METHOD_INTERSECT

+ const MASK_METHOD_INVERSE_ALPHA

+ const MASK_METHOD_INVERSE_LUMA

+ const MASK_METHOD_LIGHTEN

+ const MASK_METHOD_LUMA

+ const MASK_METHOD_NONE

+ const MASK_METHOD_SUBTRACT

+ type Matrix struct

+ E11 float32

+ E12 float32

+ E13 float32

+ E21 float32

+ E22 float32

+ E23 float32

+ E31 float32

+ E32 float32

+ E33 float32

+ type Paint interface

+ type PathCommand uint8

+ const PATH_COMMAND_CLOSE

+ const PATH_COMMAND_CUBIC_TO

+ const PATH_COMMAND_LINE_TO

+ const PATH_COMMAND_MOVE_TO

+ type Picture struct

+ func PictureNew() Picture

+ func (paint Picture) GetAABB() (float32, float32, float32, float32, error)

+ func (paint Picture) GetClip() (any, bool)

+ func (paint Picture) GetId() uint32

+ func (paint Picture) GetMaskMethod(target Paint) (MaskMethod, error)

+ func (paint Picture) GetOBB() ([4]Point, error)

+ func (paint Picture) GetOpacity() (uint8, error)

+ func (paint Picture) GetParent() (any, bool)

+ func (paint Picture) GetRef() int

+ func (paint Picture) GetType() (Type, error)

+ func (paint Picture) GetVisible() bool

+ func (paint Picture) Intersects(x int, y int, width int, height int) bool

+ func (paint Picture) Ref() int

+ func (paint Picture) Rel() error

+ func (paint Picture) Ret_transform() (Matrix, error)

+ func (paint Picture) Rotate(degree float32) error

+ func (paint Picture) Scale(factor float32) error

+ func (paint Picture) SetBlendMethod(method BlendMethod) error

+ func (paint Picture) SetClip(clipper Paint) error

+ func (paint Picture) SetId(id uint32) error

+ func (paint Picture) SetMaskMethod(target Paint, method MaskMethod) error

+ func (paint Picture) SetOpacity(opacity uint8) error

+ func (paint Picture) SetTransform(matrix Matrix) error

+ func (paint Picture) SetVisible(visible bool) error

+ func (paint Picture) Translate(x float32, y float32) error

+ func (paint Picture) Unref(free bool) int

+ func (picture Picture) Duplicate() Picture

+ func (picture Picture) GetOrigin() (float32, float32, error)

+ func (picture Picture) GetPaint(id uint) (Paint, bool)

+ func (picture Picture) GetSize() (float32, float32, error)

+ func (picture Picture) Load(path string) error

+ func (picture Picture) LoadData(data []byte, mimetype string, rpath string) error

+ func (picture Picture) LoadDataText(text string, mimetype string, rpath string) error

+ func (picture Picture) LoadRaw(data []byte, width uint, height uint, colorSpace ColorSpace) error

+ func (picture Picture) SetAccessible(accessible bool) error

+ func (picture Picture) SetAssetResolver(resolver PictureAssetResolver) error

+ func (picture Picture) SetFilter(method FilterMethod) error

+ func (picture Picture) SetOrigin(x float32, y float32) error

+ func (picture Picture) SetSize(width float32, height float32) error

+ type PictureAssetResolver func(paint Paint, src string) bool

+ type Point struct

+ X float32

+ Y float32

+ type RadialGradient struct

+ func RadialGradientNew() RadialGradient

+ func (gradient RadialGradient) Del() error

+ func (gradient RadialGradient) Duplicate() RadialGradient

+ func (gradient RadialGradient) GetColorStops() ([]ColorStop, error)

+ func (gradient RadialGradient) GetSpread() (StrokeFill, error)

+ func (gradient RadialGradient) GetTransform() (Matrix, error)

+ func (gradient RadialGradient) GetType() (Type, error)

+ func (gradient RadialGradient) RadialGet() (float32, float32, float32, float32, float32, float32, error)

+ func (gradient RadialGradient) RadialSet(cx float32, cy float32, r float32, fx float32, fy float32, fr float32) error

+ func (gradient RadialGradient) SetColorStops(colorStops []ColorStop) error

+ func (gradient RadialGradient) SetSpread(spread StrokeFill) error

+ func (gradient RadialGradient) SetTransform(matrix Matrix) error

+ type Result enum

+ const RESULT_FAILED_ALLOCATION

+ const RESULT_INSUFFICIENT_CONDITION

+ const RESULT_INVALID_ARGUMENT

+ const RESULT_MEMORY_CORRUPTION

+ const RESULT_NOT_SUPPORTED

+ const RESULT_SUCCESS

+ const RESULT_UNKNOWN

+ type ResultError struct

+ func (err ResultError) Error() string

+ func (err ResultError) Result() Result

+ type Saver uintptr

+ func SaverNew() Saver

+ func (saver Saver) Del() error

+ func (saver Saver) SaveAnimation(animation Animation, path string, quality uint, fps uint) error

+ func (saver Saver) SavePaint(paint Paint, path string, quality uint) error

+ func (saver Saver) Sync() error

+ type Scene struct

+ func SceneNew() Scene

+ func (paint Scene) GetAABB() (float32, float32, float32, float32, error)

+ func (paint Scene) GetClip() (any, bool)

+ func (paint Scene) GetId() uint32

+ func (paint Scene) GetMaskMethod(target Paint) (MaskMethod, error)

+ func (paint Scene) GetOBB() ([4]Point, error)

+ func (paint Scene) GetOpacity() (uint8, error)

+ func (paint Scene) GetParent() (any, bool)

+ func (paint Scene) GetRef() int

+ func (paint Scene) GetType() (Type, error)

+ func (paint Scene) GetVisible() bool

+ func (paint Scene) Intersects(x int, y int, width int, height int) bool

+ func (paint Scene) Ref() int

+ func (paint Scene) Rel() error

+ func (paint Scene) Ret_transform() (Matrix, error)

+ func (paint Scene) Rotate(degree float32) error

+ func (paint Scene) Scale(factor float32) error

+ func (paint Scene) SetBlendMethod(method BlendMethod) error

+ func (paint Scene) SetClip(clipper Paint) error

+ func (paint Scene) SetId(id uint32) error

+ func (paint Scene) SetMaskMethod(target Paint, method MaskMethod) error

+ func (paint Scene) SetOpacity(opacity uint8) error

+ func (paint Scene) SetTransform(matrix Matrix) error

+ func (paint Scene) SetVisible(visible bool) error

+ func (paint Scene) Translate(x float32, y float32) error

+ func (paint Scene) Unref(free bool) int

+ func (scene Scene) Add(paint Paint) error

+ func (scene Scene) AddEffectDropShadow(r int, g int, b int, a int, angle float64, distance float64, sigma float64, ...) error

+ func (scene Scene) AddEffectFill(r int, g int, b int, a int) error

+ func (scene Scene) AddEffectGaussianBlur(sigma float64, direction int, border int, quality int) error

+ func (scene Scene) AddEffectTint(black_r int, black_g int, black_b int, white_r int, white_g int, white_b int, ...) error

+ func (scene Scene) AddEffectTritone(shadow_r int, shadow_g int, shadow_b int, midtone_r int, midtone_g int, ...) error

+ func (scene Scene) ClearEffects() error

+ func (scene Scene) Duplicate() Scene

+ func (scene Scene) Insert(target Paint, at Paint) error

+ func (scene Scene) Remove(paint Paint) error

+ type Shape struct

+ func ShapeNew() Shape

+ func (paint Shape) GetAABB() (float32, float32, float32, float32, error)

+ func (paint Shape) GetClip() (any, bool)

+ func (paint Shape) GetId() uint32

+ func (paint Shape) GetMaskMethod(target Paint) (MaskMethod, error)

+ func (paint Shape) GetOBB() ([4]Point, error)

+ func (paint Shape) GetOpacity() (uint8, error)

+ func (paint Shape) GetParent() (any, bool)

+ func (paint Shape) GetRef() int

+ func (paint Shape) GetType() (Type, error)

+ func (paint Shape) GetVisible() bool

+ func (paint Shape) Intersects(x int, y int, width int, height int) bool

+ func (paint Shape) Ref() int

+ func (paint Shape) Rel() error

+ func (paint Shape) Ret_transform() (Matrix, error)

+ func (paint Shape) Rotate(degree float32) error

+ func (paint Shape) Scale(factor float32) error

+ func (paint Shape) SetBlendMethod(method BlendMethod) error

+ func (paint Shape) SetClip(clipper Paint) error

+ func (paint Shape) SetId(id uint32) error

+ func (paint Shape) SetMaskMethod(target Paint, method MaskMethod) error

+ func (paint Shape) SetOpacity(opacity uint8) error

+ func (paint Shape) SetTransform(matrix Matrix) error

+ func (paint Shape) SetVisible(visible bool) error

+ func (paint Shape) Translate(x float32, y float32) error

+ func (paint Shape) Unref(free bool) int

+ func (shape Shape) AppendCircle(cx float32, cy float32, rx float32, ry float32, cw bool) error

+ func (shape Shape) AppendPath(cmds []PathCommand, pts []Point) error

+ func (shape Shape) AppendRect(x float32, y float32, w float32, h float32, rx float32, ry float32, cw bool) error

+ func (shape Shape) Close() error

+ func (shape Shape) CubicTo(cx1 float32, cy1 float32, cx2 float32, cy2 float32, x float32, y float32) error

+ func (shape Shape) Duplicate() Shape

+ func (shape Shape) GetFillColor() (uint8, uint8, uint8, uint8, error)

+ func (shape Shape) GetFillRule() (FillRule, error)

+ func (shape Shape) GetGradient() (Gradient, bool, error)

+ func (shape Shape) GetPath() ([]PathCommand, []Point, error)

+ func (shape Shape) GetStrokeCap() (StrokeCap, error)

+ func (shape Shape) GetStrokeColor() (int, int, int, int, error)

+ func (shape Shape) GetStrokeDash() ([]float32, float32, error)

+ func (shape Shape) GetStrokeGradient() (Gradient, error)

+ func (shape Shape) GetStrokeJoin() (StrokeJoin, error)

+ func (shape Shape) GetStrokeMiterlimit() (float32, error)

+ func (shape Shape) GetStrokeWidth() (float32, error)

+ func (shape Shape) LineTo(x float32, y float32) error

+ func (shape Shape) MoveTo(x float32, y float32) error

+ func (shape Shape) Reset() error

+ func (shape Shape) SetFillColor(r uint8, g uint8, b uint8, a uint8) error

+ func (shape Shape) SetFillRule(rule FillRule) error

+ func (shape Shape) SetGradient(gradient Gradient) error

+ func (shape Shape) SetPaintOrder(strokeFirst bool) error

+ func (shape Shape) SetStrokeCap(strokeCap StrokeCap) error

+ func (shape Shape) SetStrokeColor(r uint, g uint, b uint, a uint) error

+ func (shape Shape) SetStrokeDash(pattern []float32, offset float32) error

+ func (shape Shape) SetStrokeGradient(grad Gradient) error

+ func (shape Shape) SetStrokeJoin(join StrokeJoin) error

+ func (shape Shape) SetStrokeMiterlimit(miterlimit float32) error

+ func (shape Shape) SetStrokeWidth(width float32) error

+ func (shape Shape) SetTrimpath(begin float32, end float32, simultaneous bool) error

+ type StrokeCap enum

+ const STROKE_CAP_BUTT

+ const STROKE_CAP_ROUND

+ const STROKE_CAP_SQUARE

+ const STROKE_JOIN_BEVEL

+ const STROKE_JOIN_MITER

+ const STROKE_JOIN_ROUND

+ type StrokeFill enum

+ const STROKE_FILL_PAD

+ const STROKE_FILL_REFLECT

+ const STROKE_FILL_REPEAT

+ type StrokeJoin enum

+ type Text struct

+ func TextNew() Text

+ func (paint Text) GetAABB() (float32, float32, float32, float32, error)

+ func (paint Text) GetClip() (any, bool)

+ func (paint Text) GetId() uint32

+ func (paint Text) GetMaskMethod(target Paint) (MaskMethod, error)

+ func (paint Text) GetOBB() ([4]Point, error)

+ func (paint Text) GetOpacity() (uint8, error)

+ func (paint Text) GetParent() (any, bool)

+ func (paint Text) GetRef() int

+ func (paint Text) GetType() (Type, error)

+ func (paint Text) GetVisible() bool

+ func (paint Text) Intersects(x int, y int, width int, height int) bool

+ func (paint Text) Ref() int

+ func (paint Text) Rel() error

+ func (paint Text) Ret_transform() (Matrix, error)

+ func (paint Text) Rotate(degree float32) error

+ func (paint Text) Scale(factor float32) error

+ func (paint Text) SetBlendMethod(method BlendMethod) error

+ func (paint Text) SetClip(clipper Paint) error

+ func (paint Text) SetId(id uint32) error

+ func (paint Text) SetMaskMethod(target Paint, method MaskMethod) error

+ func (paint Text) SetOpacity(opacity uint8) error

+ func (paint Text) SetTransform(matrix Matrix) error

+ func (paint Text) SetVisible(visible bool) error

+ func (paint Text) Translate(x float32, y float32) error

+ func (paint Text) Unref(free bool) int

+ func (text Text) Align(x float32, y float32) error

+ func (text Text) Duplicate() Text

+ func (text Text) GetGlyphMetrics(ch rune) (GlyphMetrics, error)

+ func (text Text) GetTextMetrics() (TextMetrics, error)

+ func (text Text) Layout(width float32, h float32) error

+ func (text Text) SetColor(r uint8, g uint8, b uint8) error

+ func (text Text) SetFont(name string) error

+ func (text Text) SetGradient(gradient Gradient) error

+ func (text Text) SetItalic(shear float32) error

+ func (text Text) SetOutline(width float32, r uint8, g uint8, b uint8) error

+ func (text Text) SetSize(size float32) error

+ func (text Text) SetText(utf8 string) error

+ func (text Text) Spacing(letter float32, line float32) error

+ func (text Text) WrapMode(mode TextWrap) error

+ type TextMetrics struct

+ Advance float32

+ Ascent float32

+ Descent float32

+ Linegap float32

+ type TextWrap enum

+ const TEXT_WRAP_CHARACTER

+ const TEXT_WRAP_ELLIPSIS

+ const TEXT_WRAP_HYPHENATION

+ const TEXT_WRAP_NONE

+ const TEXT_WRAP_SMART

+ const TEXT_WRAP_WORD

+ type Type enum

+ const TYPE_LINEAR_GRAD

+ const TYPE_PICTURE

+ const TYPE_RADIAL_GRAD

+ const TYPE_SCENE

+ const TYPE_SHAPE

+ const TYPE_TEXT

+ const TYPE_UNDEF