cairo

package
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 Go to latest Published: Feb 13, 2020 License: ISC Imports: 7 Imported by: 109

Documentation

Overview

Package cairo implements Go bindings for Cairo. Supports version 1.10 and later.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func FormatStrideForWidth 

func FormatStrideForWidth(format Format, width int) int

FormatStrideForWidth is a wrapper for cairo_format_stride_for_width().

func StatusToString 

func StatusToString(status Status) string

Types

type Antialias 

type Antialias int

Antialias is a representation of Cairo's cairo_antialias_t. 

const (
	ANTIALIAS_DEFAULT  Antialias = C.CAIRO_ANTIALIAS_DEFAULT
	ANTIALIAS_NONE     Antialias = C.CAIRO_ANTIALIAS_NONE
	ANTIALIAS_GRAY     Antialias = C.CAIRO_ANTIALIAS_GRAY
	ANTIALIAS_SUBPIXEL Antialias = C.CAIRO_ANTIALIAS_SUBPIXEL
)

type Content 

type Content int

Content is a representation of Cairo's cairo_content_t. 

const (
	CONTENT_COLOR       Content = C.CAIRO_CONTENT_COLOR
	CONTENT_ALPHA       Content = C.CAIRO_CONTENT_ALPHA
	CONTENT_COLOR_ALPHA Content = C.CAIRO_CONTENT_COLOR_ALPHA
)

type Context 

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

Context is a representation of Cairo's cairo_t.

func Create 

func Create(target *Surface) *Context

Create is a wrapper around cairo_create().

func WrapContext 

func WrapContext(p uintptr) *Context

func (*Context) Arc 

func (v *Context) Arc(xc, yc, radius, angle1, angle2 float64)

Arc is a wrapper around cairo_arc().

func (*Context) ArcNegative 

func (v *Context) ArcNegative(xc, yc, radius, angle1, angle2 float64)

ArcNegative is a wrapper around cairo_arc_negative().

func (*Context) Clip 

func (v *Context) Clip()

Clip is a wrapper around cairo_clip().

func (*Context) ClipExtents 

func (v *Context) ClipExtents() (x1, y1, x2, y2 float64)

ClipExtents is a wrapper around cairo_clip_extents().

func (*Context) ClipPreserve 

func (v *Context) ClipPreserve()

ClipPreserve is a wrapper around cairo_clip_preserve().

func (*Context) Close 

func (v *Context) Close()

Closes the context. The context must not be used afterwards.

func (*Context) ClosePath 

func (v *Context) ClosePath()

ClosePath is a wrapper around cairo_close_path().

func (*Context) CopyPage 

func (v *Context) CopyPage()

CopyPage is a wrapper around cairo_copy_page().

func (*Context) CurveTo 

func (v *Context) CurveTo(x1, y1, x2, y2, x3, y3 float64)

CurveTo is a wrapper around cairo_curve_to().

func (*Context) DeviceToUser 

func (v *Context) DeviceToUser(x, y float64) (float64, float64)

DeviceToUser is a wrapper around cairo_device_to_user.

func (*Context) DeviceToUserDistance 

func (v *Context) DeviceToUserDistance(x, y float64) (float64, float64)

DeviceToUserDistance is a wrapper around cairo_device_to_user_distance.

func (*Context) Fill 

func (v *Context) Fill()

Fill is a wrapper around cairo_fill().

func (*Context) FillExtents 

func (v *Context) FillExtents() (x1, y1, x2, y2 float64)

FillExtents is a wrapper around cairo_fill_extents().

func (*Context) FillPreserve 

func (v *Context) FillPreserve()

FillPreserve is a wrapper around cairo_fill_preserve().

func (*Context) FontExtents 

func (v *Context) FontExtents() FontExtents

func (*Context) GetAntialias 

func (v *Context) GetAntialias() Antialias

GetAntialias is a wrapper around cairo_get_antialias().

func (*Context) GetCContext 

func (v *Context) GetCContext() *C.cairo_t

func (*Context) GetCurrentPoint 

func (v *Context) GetCurrentPoint() (x, y float64)

GetCurrentPoint is a wrapper around cairo_get_current_point().

func (*Context) GetDash 

func (v *Context) GetDash() (dashes []float64, offset float64)

GetDash is a wrapper around cairo_get_dash().

func (*Context) GetDashCount 

func (v *Context) GetDashCount() int

GetDashCount is a wrapper around cairo_get_dash_count().

func (*Context) GetFillRule 

func (v *Context) GetFillRule() FillRule

GetFillRule is a wrapper around cairo_get_fill_rule().

func (*Context) GetGroupTarget 

func (v *Context) GetGroupTarget() *Surface

GetGroupTarget is a wrapper around cairo_get_group_target().

func (*Context) GetLineCap 

func (v *Context) GetLineCap() LineCap

GetLineCap is a wrapper around cairo_get_line_cap().

func (*Context) GetLineJoin 

func (v *Context) GetLineJoin() LineJoin

GetLineJoin is a wrapper around cairo_get_line_join().

func (*Context) GetLineWidth 

func (v *Context) GetLineWidth() float64

GetLineWidth is a wrapper cairo_get_line_width().

func (*Context) GetMatrix 

func (v *Context) GetMatrix() *Matrix

GetMatrix is a wrapper around cairo_get_matrix.

func (*Context) GetMiterLimit 

func (v *Context) GetMiterLimit() float64

GetMiterLimit is a wrapper around cairo_get_miter_limit().

func (*Context) GetOperator 

func (v *Context) GetOperator() Operator

GetOperator is a wrapper around cairo_get_operator().

func (*Context) GetTarget 

func (v *Context) GetTarget() *Surface

GetTarget is a wrapper around cairo_get_target().

func (*Context) GetTolerance 

func (v *Context) GetTolerance() float64

GetTolerance is a wrapper around cairo_get_tolerance().

func (*Context) IdentityMatrix 

func (v *Context) IdentityMatrix()

IdentityMatrix is a wrapper around cairo_identity_matrix().

Resets the current transformation matrix (CTM) by setting it equal to the identity matrix. That is, the user-space and device-space axes will be aligned and one user-space unit will transform to one device-space unit.

func (*Context) InClip 

func (v *Context) InClip(x, y float64) bool

InClip is a wrapper around cairo_in_clip().

func (*Context) InFill 

func (v *Context) InFill(x, y float64) bool

InFill is a wrapper around cairo_in_fill().

func (*Context) InStroke 

func (v *Context) InStroke(x, y float64) bool

InStroke is a wrapper around cairo_in_stroke().

func (*Context) LineTo 

func (v *Context) LineTo(x, y float64)

LineTo is a wrapper around cairo_line_to().

func (*Context) MaskSurface 

func (v *Context) MaskSurface(surface *Surface, surfaceX, surfaceY float64)

MaskSurface is a wrapper around cairo_mask_surface().

func (*Context) MoveTo 

func (v *Context) MoveTo(x, y float64)

MoveTo is a wrapper around cairo_move_to().

func (*Context) Native 

func (v *Context) Native() uintptr

Native returns a pointer to the underlying cairo_t.

func (*Context) NewPath 

func (v *Context) NewPath()

NewPath is a wrapper around cairo_new_path().

func (*Context) Paint 

func (v *Context) Paint()

Paint is a wrapper around cairo_paint().

func (*Context) PaintWithAlpha 

func (v *Context) PaintWithAlpha(alpha float64)

PaintWithAlpha is a wrapper around cairo_paint_with_alpha().

func (*Context) PopGroupToSource 

func (v *Context) PopGroupToSource()

PopGroupToSource is a wrapper around cairo_pop_group_to_source().

func (*Context) PushGroup 

func (v *Context) PushGroup()

PushGroup is a wrapper around cairo_push_group().

func (*Context) PushGroupWithContent 

func (v *Context) PushGroupWithContent(content Content)

PushGroupWithContent is a wrapper around cairo_push_group_with_content().

func (*Context) Rectangle 

func (v *Context) Rectangle(x, y, w, h float64)

Rectangle is a wrapper around cairo_rectangle().

func (*Context) ResetClip 

func (v *Context) ResetClip()

ResetClip is a wrapper around cairo_reset_clip().

func (*Context) Restore 

func (v *Context) Restore()

Restore is a wrapper around cairo_restore().

func (*Context) Rotate 

func (v *Context) Rotate(angle float64)

Rotate is a wrapper around cairo_rotate.

func (*Context) Save 

func (v *Context) Save()

Save is a wrapper around cairo_save().

func (*Context) Scale 

func (v *Context) Scale(sx, sy float64)

Scale is a wrapper around cairo_scale.

func (*Context) SelectFontFace 

func (v *Context) SelectFontFace(family string, slant FontSlant, weight FontWeight)

func (*Context) SetAntialias 

func (v *Context) SetAntialias(antialias Antialias)

SetAntialias is a wrapper around cairo_set_antialias().

func (*Context) SetDash 

func (v *Context) SetDash(dashes []float64, offset float64)

SetDash is a wrapper around cairo_set_dash().

func (*Context) SetFillRule 

func (v *Context) SetFillRule(fillRule FillRule)

SetFillRule is a wrapper around cairo_set_fill_rule().

func (*Context) SetFontSize 

func (v *Context) SetFontSize(size float64)

func (*Context) SetLineCap 

func (v *Context) SetLineCap(lineCap LineCap)

SetLineCap is a wrapper around cairo_set_line_cap().

func (*Context) SetLineJoin 

func (v *Context) SetLineJoin(lineJoin LineJoin)

SetLineJoin is a wrapper around cairo_set_line_join().

func (*Context) SetLineWidth 

func (v *Context) SetLineWidth(width float64)

SetLineWidth is a wrapper around cairo_set_line_width().

func (*Context) SetMatrix 

func (v *Context) SetMatrix(matrix *Matrix)

SetMatrix is a wrapper around cairo_set_matrix.

func (*Context) SetMiterLimit 

func (v *Context) SetMiterLimit(limit float64)

SetMiterLimit is a wrapper around cairo_set_miter_limit().

func (*Context) SetOperator 

func (v *Context) SetOperator(op Operator)

SetOperator is a wrapper around cairo_set_operator().

func (*Context) SetSource 

func (v *Context) SetSource(p *Pattern)

SetSource is a wrapper around cairo_set_source().

func (*Context) SetSourceRGB 

func (v *Context) SetSourceRGB(red, green, blue float64)

SetSourceRGB is a wrapper around cairo_set_source_rgb().

func (*Context) SetSourceRGBA 

func (v *Context) SetSourceRGBA(red, green, blue, alpha float64)

SetSourceRGBA is a wrapper around cairo_set_source_rgba().

func (*Context) SetSourceSurface 

func (v *Context) SetSourceSurface(surface *Surface, x, y float64)

SetSourceSurface is a wrapper around cairo_set_source_surface().

func (*Context) SetTolerance 

func (v *Context) SetTolerance(tolerance float64)

SetTolerance is a wrapper around cairo_set_tolerance().

func (*Context) ShowPage 

func (v *Context) ShowPage()

ShowPage is a wrapper around cairo_show_page().

func (*Context) ShowText 

func (v *Context) ShowText(utf8 string)

func (*Context) Status 

func (v *Context) Status() Status

Status is a wrapper around cairo_status().

func (*Context) Stroke 

func (v *Context) Stroke()

Stroke is a wrapper around cairo_stroke().

func (*Context) StrokeExtents 

func (v *Context) StrokeExtents() (x1, y1, x2, y2 float64)

StrokeExtents is a wrapper around cairo_stroke_extents().

func (*Context) StrokePreserve 

func (v *Context) StrokePreserve()

StrokePreserve is a wrapper around cairo_stroke_preserve().

func (*Context) TextExtents 

func (v *Context) TextExtents(utf8 string) TextExtents

func (*Context) Transform 

func (v *Context) Transform(matrix *Matrix)

Transform is a wrapper around cairo_transform.

func (*Context) Translate 

func (v *Context) Translate(tx, ty float64)

Translate is a wrapper around cairo_translate.

func (*Context) UserToDevice 

func (v *Context) UserToDevice(x, y float64) (float64, float64)

UserToDevice is a wrapper around cairo_user_to_device.

func (*Context) UserToDeviceDistance 

func (v *Context) UserToDeviceDistance(dx, dy float64) (float64, float64)

UserToDeviceDistance is a wrapper around cairo_user_to_device_distance.

type ErrorStatus 

type ErrorStatus Status

func (ErrorStatus) Error 

func (e ErrorStatus) Error() string

type FillRule 

type FillRule int

FillRule is a representation of Cairo's cairo_fill_rule_t. 

const (
	FILL_RULE_WINDING  FillRule = C.CAIRO_FILL_RULE_WINDING
	FILL_RULE_EVEN_ODD FillRule = C.CAIRO_FILL_RULE_EVEN_ODD
)

type FontExtents 

type FontExtents struct {
	Ascent      float64
	Descent     float64
	Height      float64
	MaxXAdvance float64
	MaxYAdvance float64
}

type FontSlant 

type FontSlant int

FontSlant is a representation of Cairo's cairo_font_slant_t 

const (
	FONT_SLANT_NORMAL  FontSlant = C.CAIRO_FONT_SLANT_NORMAL
	FONT_SLANT_ITALIC  FontSlant = C.CAIRO_FONT_SLANT_ITALIC
	FONT_SLANT_OBLIQUE FontSlant = C.CAIRO_FONT_SLANT_OBLIQUE
)

type FontWeight 

type FontWeight int

FontWeight is a representation of Cairo's cairo_font_weight_t 

const (
	FONT_WEIGHT_NORMAL FontWeight = C.CAIRO_FONT_WEIGHT_NORMAL
	FONT_WEIGHT_BOLD   FontWeight = C.CAIRO_FONT_WEIGHT_BOLD
)

type Format 

type Format int

Format is a representation of Cairo's cairo_format_t. 

const (
	FORMAT_INVALID   Format = C.CAIRO_FORMAT_INVALID
	FORMAT_ARGB32    Format = C.CAIRO_FORMAT_ARGB32
	FORMAT_RGB24     Format = C.CAIRO_FORMAT_RGB24
	FORMAT_A8        Format = C.CAIRO_FORMAT_A8
	FORMAT_A1        Format = C.CAIRO_FORMAT_A1
	FORMAT_RGB16_565 Format = C.CAIRO_FORMAT_RGB16_565
	FORMAT_RGB30     Format = C.CAIRO_FORMAT_RGB30
)

type LineCap 

type LineCap int

LineCap is a representation of Cairo's cairo_line_cap_t. 

const (
	LINE_CAP_BUTT   LineCap = C.CAIRO_LINE_CAP_BUTT
	LINE_CAP_ROUND  LineCap = C.CAIRO_LINE_CAP_ROUND
	LINE_CAP_SQUARE LineCap = C.CAIRO_LINE_CAP_SQUARE
)

type LineJoin 

type LineJoin int

LineJoin is a representation of Cairo's cairo_line_join_t. 

const (
	LINE_JOIN_MITER LineJoin = C.CAIRO_LINE_JOIN_MITER
	LINE_JOIN_ROUND LineJoin = C.CAIRO_LINE_JOIN_ROUND
	LINE_JOIN_BEVEL LineJoin = C.CAIRO_LINE_JOIN_BEVEL
)

type Matrix 

type Matrix struct {
	Xx, Yx float64
	Xy, Yy float64
	X0, Y0 float64
}

Matrix struct

func NewMatrix 

func NewMatrix(xx, yx, xy, yy, x0, y0 float64) *Matrix

NewMatrix creates a new identiy matrix

func (*Matrix) InitIdentity 

func (m *Matrix) InitIdentity()

InitIdentity initializes this matrix to identity matrix

func (*Matrix) InitRotate 

func (m *Matrix) InitRotate(radians float64)

InitRotate initializes a matrix with the given rotation

func (*Matrix) InitScale 

func (m *Matrix) InitScale(sx, sy float64)

InitScale initializes a matrix with the give scale

func (*Matrix) InitTranslate 

func (m *Matrix) InitTranslate(tx, ty float64)

InitTranslate initializes a matrix with the given translation

func (*Matrix) Invert 

func (m *Matrix) Invert()

Invert inverts the matrix

func (*Matrix) Multiply 

func (m *Matrix) Multiply(a, b Matrix)

Multiply multiplies the matrix by another matrix

func (*Matrix) Native 

func (m *Matrix) Native() uintptr

Native returns native c pointer to a matrix

func (*Matrix) Rotate 

func (m *Matrix) Rotate(radians float64)

Rotate rotates the matrix by the given amount

func (*Matrix) Scale 

func (m *Matrix) Scale(sx, sy float64)

Scale scales the matrix by the given amounts

func (*Matrix) TransformDistance 

func (m *Matrix) TransformDistance(dx, dy float64) (float64, float64)

TransformDistance ...

func (*Matrix) TransformPoint 

func (m *Matrix) TransformPoint(x, y float64) (float64, float64)

TransformPoint ...

func (*Matrix) Translate 

func (m *Matrix) Translate(tx, ty float64)

Translate translates a matrix by the given amount

type MimeType 

type MimeType string

MimeType is a representation of Cairo's CAIRO_MIME_TYPE_* preprocessor constants. 

const (
	MIME_TYPE_JP2       MimeType = "image/jp2"
	MIME_TYPE_JPEG      MimeType = "image/jpeg"
	MIME_TYPE_PNG       MimeType = "image/png"
	MIME_TYPE_URI       MimeType = "image/x-uri"
	MIME_TYPE_UNIQUE_ID MimeType = "application/x-cairo.uuid"
)

type Operator 

type Operator int

Operator is a representation of Cairo's cairo_operator_t. 

const (
	OPERATOR_CLEAR          Operator = C.CAIRO_OPERATOR_CLEAR
	OPERATOR_SOURCE         Operator = C.CAIRO_OPERATOR_SOURCE
	OPERATOR_OVER           Operator = C.CAIRO_OPERATOR_OVER
	OPERATOR_IN             Operator = C.CAIRO_OPERATOR_IN
	OPERATOR_OUT            Operator = C.CAIRO_OPERATOR_OUT
	OPERATOR_ATOP           Operator = C.CAIRO_OPERATOR_ATOP
	OPERATOR_DEST           Operator = C.CAIRO_OPERATOR_DEST
	OPERATOR_DEST_OVER      Operator = C.CAIRO_OPERATOR_DEST_OVER
	OPERATOR_DEST_IN        Operator = C.CAIRO_OPERATOR_DEST_IN
	OPERATOR_DEST_OUT       Operator = C.CAIRO_OPERATOR_DEST_OUT
	OPERATOR_DEST_ATOP      Operator = C.CAIRO_OPERATOR_DEST_ATOP
	OPERATOR_XOR            Operator = C.CAIRO_OPERATOR_XOR
	OPERATOR_ADD            Operator = C.CAIRO_OPERATOR_ADD
	OPERATOR_SATURATE       Operator = C.CAIRO_OPERATOR_SATURATE
	OPERATOR_MULTIPLY       Operator = C.CAIRO_OPERATOR_MULTIPLY
	OPERATOR_SCREEN         Operator = C.CAIRO_OPERATOR_SCREEN
	OPERATOR_OVERLAY        Operator = C.CAIRO_OPERATOR_OVERLAY
	OPERATOR_DARKEN         Operator = C.CAIRO_OPERATOR_DARKEN
	OPERATOR_LIGHTEN        Operator = C.CAIRO_OPERATOR_LIGHTEN
	OPERATOR_COLOR_DODGE    Operator = C.CAIRO_OPERATOR_COLOR_DODGE
	OPERATOR_COLOR_BURN     Operator = C.CAIRO_OPERATOR_COLOR_BURN
	OPERATOR_HARD_LIGHT     Operator = C.CAIRO_OPERATOR_HARD_LIGHT
	OPERATOR_SOFT_LIGHT     Operator = C.CAIRO_OPERATOR_SOFT_LIGHT
	OPERATOR_DIFFERENCE     Operator = C.CAIRO_OPERATOR_DIFFERENCE
	OPERATOR_EXCLUSION      Operator = C.CAIRO_OPERATOR_EXCLUSION
	OPERATOR_HSL_HUE        Operator = C.CAIRO_OPERATOR_HSL_HUE
	OPERATOR_HSL_SATURATION Operator = C.CAIRO_OPERATOR_HSL_SATURATION
	OPERATOR_HSL_COLOR      Operator = C.CAIRO_OPERATOR_HSL_COLOR
	OPERATOR_HSL_LUMINOSITY Operator = C.CAIRO_OPERATOR_HSL_LUMINOSITY
)

type Pattern 

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

Pattern is a representation of Cairo's cairo_pattern_t.

func NewPatternForSurface 

func NewPatternForSurface(s *Surface) (*Pattern, error)

NewPatternForSurface is a wrapper around cairo_pattern_create_for_surface().

func NewPatternFromRGB 

func NewPatternFromRGB(red, green, blue float64) (*Pattern, error)

NewPatternFromRGB is a wrapper around cairo_pattern_create_rgb().

func NewPatternFromRGBA 

func NewPatternFromRGBA(red, green, blue, alpha float64) (*Pattern, error)

NewPatternFromRGBA is a wrapper around cairo_pattern_create_rgba().

func NewPatternLinear 

func NewPatternLinear(x0, y0, x1, y1 float64) (*Pattern, error)

NewPatternLinear is a wrapper around cairo_pattern_create_linear().

func NewPatternRadial 

func NewPatternRadial(x0, y0, r0, x1, y1, r1 float64) (*Pattern, error)

NewPatternRadial is a wrapper around cairo_pattern_create_radial().

func (*Pattern) AddColorStopRGB 

func (v *Pattern) AddColorStopRGB(offset, red, green, blue float64) error

AddColorStopRGB is a wrapper around cairo_pattern_add_color_stop_rgb().

func (*Pattern) AddColorStopRGBA 

func (v *Pattern) AddColorStopRGBA(offset, red, green, blue, alpha float64) error

AddColorStopRGBA is a wrapper around cairo_pattern_add_color_stop_rgba().

func (*Pattern) Native 

func (v *Pattern) Native() uintptr

Native returns a pointer to the underlying cairo_pattern_t.

func (*Pattern) Status 

func (v *Pattern) Status() Status

Status is a wrapper around cairo_pattern_status().

type Status 

type Status int

Status is a representation of Cairo's cairo_status_t. 

const (
	STATUS_SUCCESS                   Status = C.CAIRO_STATUS_SUCCESS
	STATUS_NO_MEMORY                 Status = C.CAIRO_STATUS_NO_MEMORY
	STATUS_INVALID_RESTORE           Status = C.CAIRO_STATUS_INVALID_RESTORE
	STATUS_INVALID_POP_GROUP         Status = C.CAIRO_STATUS_INVALID_POP_GROUP
	STATUS_NO_CURRENT_POINT          Status = C.CAIRO_STATUS_NO_CURRENT_POINT
	STATUS_INVALID_MATRIX            Status = C.CAIRO_STATUS_INVALID_MATRIX
	STATUS_INVALID_STATUS            Status = C.CAIRO_STATUS_INVALID_STATUS
	STATUS_NULL_POINTER              Status = C.CAIRO_STATUS_NULL_POINTER
	STATUS_INVALID_STRING            Status = C.CAIRO_STATUS_INVALID_STRING
	STATUS_INVALID_PATH_DATA         Status = C.CAIRO_STATUS_INVALID_PATH_DATA
	STATUS_READ_ERROR                Status = C.CAIRO_STATUS_READ_ERROR
	STATUS_WRITE_ERROR               Status = C.CAIRO_STATUS_WRITE_ERROR
	STATUS_SURFACE_FINISHED          Status = C.CAIRO_STATUS_SURFACE_FINISHED
	STATUS_SURFACE_TYPE_MISMATCH     Status = C.CAIRO_STATUS_SURFACE_TYPE_MISMATCH
	STATUS_PATTERN_TYPE_MISMATCH     Status = C.CAIRO_STATUS_PATTERN_TYPE_MISMATCH
	STATUS_INVALID_CONTENT           Status = C.CAIRO_STATUS_INVALID_CONTENT
	STATUS_INVALID_FORMAT            Status = C.CAIRO_STATUS_INVALID_FORMAT
	STATUS_INVALID_VISUAL            Status = C.CAIRO_STATUS_INVALID_VISUAL
	STATUS_FILE_NOT_FOUND            Status = C.CAIRO_STATUS_FILE_NOT_FOUND
	STATUS_INVALID_DASH              Status = C.CAIRO_STATUS_INVALID_DASH
	STATUS_INVALID_DSC_COMMENT       Status = C.CAIRO_STATUS_INVALID_DSC_COMMENT
	STATUS_INVALID_INDEX             Status = C.CAIRO_STATUS_INVALID_INDEX
	STATUS_CLIP_NOT_REPRESENTABLE    Status = C.CAIRO_STATUS_CLIP_NOT_REPRESENTABLE
	STATUS_TEMP_FILE_ERROR           Status = C.CAIRO_STATUS_TEMP_FILE_ERROR
	STATUS_INVALID_STRIDE            Status = C.CAIRO_STATUS_INVALID_STRIDE
	STATUS_FONT_TYPE_MISMATCH        Status = C.CAIRO_STATUS_FONT_TYPE_MISMATCH
	STATUS_USER_FONT_IMMUTABLE       Status = C.CAIRO_STATUS_USER_FONT_IMMUTABLE
	STATUS_USER_FONT_ERROR           Status = C.CAIRO_STATUS_USER_FONT_ERROR
	STATUS_NEGATIVE_COUNT            Status = C.CAIRO_STATUS_NEGATIVE_COUNT
	STATUS_INVALID_CLUSTERS          Status = C.CAIRO_STATUS_INVALID_CLUSTERS
	STATUS_INVALID_SLANT             Status = C.CAIRO_STATUS_INVALID_SLANT
	STATUS_INVALID_WEIGHT            Status = C.CAIRO_STATUS_INVALID_WEIGHT
	STATUS_INVALID_SIZE              Status = C.CAIRO_STATUS_INVALID_SIZE
	STATUS_USER_FONT_NOT_IMPLEMENTED Status = C.CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED
	STATUS_DEVICE_TYPE_MISMATCH      Status = C.CAIRO_STATUS_DEVICE_TYPE_MISMATCH
	STATUS_DEVICE_ERROR              Status = C.CAIRO_STATUS_DEVICE_ERROR
)

func (Status) String 

func (s Status) String() string

String returns a readable status messsage usable in texts.

func (Status) ToError 

func (s Status) ToError() error

ToError returns the error for the status. Returns nil if success.

type Surface 

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

Surface is a representation of Cairo's cairo_surface_t.

func CreateImageSurface 

func CreateImageSurface(format Format, width, height int) *Surface

CreateImageSurface is a wrapper around cairo_image_surface_create().

func CreateImageSurfaceForData 

func CreateImageSurfaceForData(data []byte, format Format, width, height, stride int) (*Surface, error)

CreateImageSurfaceForData is a wrapper around cairo_image_surface_create_for_data().

func CreatePDFSurface 

func CreatePDFSurface(fileName string, width float64, height float64) (*Surface, error)

/ Create a new PDF surface.

func NewSurface 

func NewSurface(s uintptr, needsRef bool) *Surface

NewSurface creates a gotk3 cairo Surface from a pointer to a C cairo_surface_t. This is primarily designed for use with other gotk3 packages and should be avoided by applications.

func NewSurfaceFromPNG 

func NewSurfaceFromPNG(fileName string) (*Surface, error)

func WrapSurface 

func WrapSurface(s uintptr) *Surface

func (*Surface) Close 

func (v *Surface) Close()

Closes the surface. The surface must not be used afterwards.

func (*Surface) CopyPage 

func (v *Surface) CopyPage()

CopyPage is a wrapper around cairo_surface_copy_page().

func (*Surface) CreateForRectangle 

func (v *Surface) CreateForRectangle(x, y, width, height float64) *Surface

CreateForRectangle is a wrapper around cairo_surface_create_for_rectangle().

func (*Surface) CreateSimilar 

func (v *Surface) CreateSimilar(content Content, width, height int) *Surface

CreateSimilar is a wrapper around cairo_surface_create_similar().

func (*Surface) Flush 

func (v *Surface) Flush()

Flush is a wrapper around cairo_surface_flush().

func (*Surface) GetData 

func (v *Surface) GetData() unsafe.Pointer

GetData is a wrapper around cairo_image_surface_get_data().

func (*Surface) GetDeviceOffset 

func (v *Surface) GetDeviceOffset() (x, y float64)

GetDeviceOffset is a wrapper around cairo_surface_get_device_offset().

func (*Surface) GetFallbackResolution 

func (v *Surface) GetFallbackResolution() (xPPI, yPPI float64)

GetFallbackResolution is a wrapper around cairo_surface_get_fallback_resolution().

func (*Surface) GetHeight 

func (v *Surface) GetHeight() int

GetHeight is a wrapper around cairo_image_surface_get_height().

func (*Surface) GetMimeData 

func (v *Surface) GetMimeData(mimeType MimeType) []byte

GetMimeData is a wrapper around cairo_surface_get_mime_data(). The returned mimetype data is returned as a Go byte slice.

func (*Surface) GetType 

func (v *Surface) GetType() SurfaceType

GetType is a wrapper around cairo_surface_get_type().

func (*Surface) GetWidth 

func (v *Surface) GetWidth() int

GetWidth is a wrapper around cairo_image_surface_get_width().

func (*Surface) HasShowTextGlyphs 

func (v *Surface) HasShowTextGlyphs() bool

HasShowTextGlyphs is a wrapper around cairo_surface_has_show_text_glyphs().

func (*Surface) MarkDirty 

func (v *Surface) MarkDirty()

MarkDirty is a wrapper around cairo_surface_mark_dirty().

func (*Surface) MarkDirtyRectangle 

func (v *Surface) MarkDirtyRectangle(x, y, width, height int)

MarkDirtyRectangle is a wrapper around cairo_surface_mark_dirty_rectangle().

func (*Surface) Native 

func (v *Surface) Native() uintptr

Native returns a pointer to the underlying cairo_surface_t.

func (*Surface) SetDeviceOffset 

func (v *Surface) SetDeviceOffset(x, y float64)

SetDeviceOffset is a wrapper around cairo_surface_set_device_offset().

func (*Surface) SetFallbackResolution 

func (v *Surface) SetFallbackResolution(xPPI, yPPI float64)

SetFallbackResolution is a wrapper around cairo_surface_set_fallback_resolution().

func (*Surface) ShowPage 

func (v *Surface) ShowPage()

ShowPage is a wrapper around cairo_surface_show_page().

func (*Surface) Status 

func (v *Surface) Status() Status

Status is a wrapper around cairo_surface_status().

func (*Surface) WriteToPNG 

func (v *Surface) WriteToPNG(fileName string) error

WriteToPNG is a wrapper around cairo_surface_write_png(). It writes the Cairo surface to the given file in PNG format.

type SurfaceType 

type SurfaceType int

SurfaceType is a representation of Cairo's cairo_surface_type_t. 

const (
	SURFACE_TYPE_IMAGE          SurfaceType = C.CAIRO_SURFACE_TYPE_IMAGE
	SURFACE_TYPE_PDF            SurfaceType = C.CAIRO_SURFACE_TYPE_PDF
	SURFACE_TYPE_PS             SurfaceType = C.CAIRO_SURFACE_TYPE_PS
	SURFACE_TYPE_XLIB           SurfaceType = C.CAIRO_SURFACE_TYPE_XLIB
	SURFACE_TYPE_XCB            SurfaceType = C.CAIRO_SURFACE_TYPE_XCB
	SURFACE_TYPE_GLITZ          SurfaceType = C.CAIRO_SURFACE_TYPE_GLITZ
	SURFACE_TYPE_QUARTZ         SurfaceType = C.CAIRO_SURFACE_TYPE_QUARTZ
	SURFACE_TYPE_WIN32          SurfaceType = C.CAIRO_SURFACE_TYPE_WIN32
	SURFACE_TYPE_BEOS           SurfaceType = C.CAIRO_SURFACE_TYPE_BEOS
	SURFACE_TYPE_DIRECTFB       SurfaceType = C.CAIRO_SURFACE_TYPE_DIRECTFB
	SURFACE_TYPE_SVG            SurfaceType = C.CAIRO_SURFACE_TYPE_SVG
	SURFACE_TYPE_OS2            SurfaceType = C.CAIRO_SURFACE_TYPE_OS2
	SURFACE_TYPE_WIN32_PRINTING SurfaceType = C.CAIRO_SURFACE_TYPE_WIN32_PRINTING
	SURFACE_TYPE_QUARTZ_IMAGE   SurfaceType = C.CAIRO_SURFACE_TYPE_QUARTZ_IMAGE
	SURFACE_TYPE_SCRIPT         SurfaceType = C.CAIRO_SURFACE_TYPE_SCRIPT
	SURFACE_TYPE_QT             SurfaceType = C.CAIRO_SURFACE_TYPE_QT
	SURFACE_TYPE_RECORDING      SurfaceType = C.CAIRO_SURFACE_TYPE_RECORDING
	SURFACE_TYPE_VG             SurfaceType = C.CAIRO_SURFACE_TYPE_VG
	SURFACE_TYPE_GL             SurfaceType = C.CAIRO_SURFACE_TYPE_GL
	SURFACE_TYPE_DRM            SurfaceType = C.CAIRO_SURFACE_TYPE_DRM
	SURFACE_TYPE_TEE            SurfaceType = C.CAIRO_SURFACE_TYPE_TEE
	SURFACE_TYPE_XML            SurfaceType = C.CAIRO_SURFACE_TYPE_XML
	SURFACE_TYPE_SKIA           SurfaceType = C.CAIRO_SURFACE_TYPE_SKIA
	SURFACE_TYPE_SUBSURFACE     SurfaceType = C.CAIRO_SURFACE_TYPE_SUBSURFACE
)

type TextExtents 

type TextExtents struct {
	XBearing float64
	YBearing float64
	Width    float64
	Height   float64
	XAdvance float64
	YAdvance float64
}

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