contentstream

package
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 Go to latest Published: Feb 21, 2024 License: MIT Imports: 18 Imported by: 2

Documentation

Overview

This package defines the commands used in PDF content stream objects. They can be chained to build an arbitrary content (see `WriteOperations` and the higher level `Appearance` object). Reciprocally, they can be obtained from a content by parsing it, using for instance the 'parser' package.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func WriteOperations 

func WriteOperations(ops ...Operation) []byte

WriteOperations concatenate the given operations.

Types

type Fl 

type Fl = model.Fl

func ParseImage 

func ParseImage(r io.Reader, mimeType string) (*model.XObjectImage, Fl, error)

ParseImage supports importing JPEG, PNG, GIFF and TIFF images, according to the given MIME type. A dpi is returned: it's a default value (72) for JPG/JPEG images, and the one found in the image for PNG and GIFF.

func ParseImageFile 

func ParseImageFile(filename string) (*model.XObjectImage, Fl, error)

ParseImageFile read the image type from the file extension. See `ParseImage` for more details.

type GradientComplex 

type GradientComplex struct {
	Direction  GradientDirection // required
	Offsets    []Fl              // between 0 and 1, should contain at least 2 elements
	Colors     [][4]Fl           // RGBA values, between 0 and 1
	Reapeating bool
}

GradientComplex supports multiple stops and opacities.

func (GradientComplex) BuildShadings 

func (gr GradientComplex) BuildShadings() (color, alpha *model.ShadingDict)

BuildShadings returns the shadings objects to use in a stream `alpha` may be nil if no opacity channel is needed.

type GradientDirection 

type GradientDirection interface {
	// contains filtered or unexported methods
}

GradientDirection is either GradientRadial or GradientLinear

type GradientLinear 

type GradientLinear [4]Fl

x1, y1, x2, y2

type GradientPointGray 

type GradientPointGray struct {
	X, Y Fl
	G    uint8
}

GradientPointGray defines the position and the gray color of a gradient step.

type GradientPointRGB 

type GradientPointRGB struct {
	X, Y Fl
	RGB
}

GradientPointRGB defines the position and the (RGB) color of a gradient step.

type GradientRadial 

type GradientRadial [6]Fl

cx, cy, fx, fy, r, fr

type GraphicState 

type GraphicState struct {
	Font     fonts.BuiltFont // the current usable font
	FontSize Fl

	XTLM    Fl // The x position of the text line matrix.
	YTLM    Fl // The y position of the text line matrix.
	Leading Fl // The current text leading.
	Matrix  model.Matrix
	// contains filtered or unexported fields
}

type GraphicStream 

type GraphicStream struct {
	State GraphicState

	BoundingBox model.Rectangle
	// contains filtered or unexported fields
}

GraphicStream is a buffer of graphics operation, with a state. It provides convenient methods to ease the creation of a content stream. Once ready, it can be transformed to an XObjectForm, a Page object or a Tilling pattern.

func NewGraphicStream 

func NewGraphicStream(bbox model.Rectangle) GraphicStream

NewGraphicStream setup the BBox and initialize the resources dictionary.

func (GraphicStream) AddExtGState 

func (ap GraphicStream) AddExtGState(newExtGState *model.GraphicState) model.ObjName

AddExtGState checks if the graphic state is in the resources map or generate a new name and adds the graphic state to the resources.

func (*GraphicStream) AddPattern 

func (ap *GraphicStream) AddPattern(newPattern model.Pattern) model.ObjName

AddPattern checks if the pattern is in the resources map or generate a new name and adds the pattern.

func (GraphicStream) AddShading 

func (ap GraphicStream) AddShading(newShading *model.ShadingDict) model.ObjName

AddShading checks is the shading is in the resources map or generates a new name and adds the shading.

func (*GraphicStream) AddXObject 

func (ap *GraphicStream) AddXObject(obj model.XObject)

AddXObject is the same as AddXObjectDims, but do not change the CTM.

func (*GraphicStream) AddXObjectDims 

func (ap *GraphicStream) AddXObjectDims(obj model.XObject, x, y, width, height Fl)

AddXObjectDims puts an image or an XObjectForm in the current page, at the given position, with the given dimentions. See `RenderingDims` for several ways of specifying image dimentions.

func (GraphicStream) ApplyToPageObject 

func (ap GraphicStream) ApplyToPageObject(page *model.PageObject, compress bool)

ApplyToPageObject update the given page with a single Content, build from the appearance. The content is optionaly compressed with the Flater filter.

func (GraphicStream) ApplyToTilling 

func (ap GraphicStream) ApplyToTilling(pattern *model.PatternTiling)

ApplyToTilling update the fields BBox, ContentStream and Resources of the given pattern.

func (*GraphicStream) BeginText 

func (ap *GraphicStream) BeginText()

BeginText starts the writing of text.

func (*GraphicStream) BeginVariableText 

func (ap *GraphicStream) BeginVariableText()

BeginVariableText starts a MarkedContent sequence of text

func (*GraphicStream) EndText 

func (ap *GraphicStream) EndText()

EndText ends the writing of text

func (*GraphicStream) EndVariableText 

func (ap *GraphicStream) EndVariableText()

EndVariableText end a MarkedContent sequence of text

func (*GraphicStream) FillLinearGradientRGB 

func (ap *GraphicStream) FillLinearGradientRGB(from, to GradientPointRGB)

AddLinearGradientRGB builds a linear gradient shading dictionnary, and use it to fill the current path.

The vector's origin and destination are specified by the points `from` and `to`, expressed in user space units. In a linear gradient, blending occurs perpendicularly to this vector. Color 1 is used up to the origin of the vector and color 2 is used beyond the vector's end point. Between the points the colors are gradually blended.

func (*GraphicStream) FillRadialGradientRGB 

func (ap *GraphicStream) FillRadialGradientRGB(from, to GradientPointRGB, radius Fl)

AddRadialGradientRGB builds a radial gradient shading dictionnary, and use it to fill the current path.

Color 1 begins at the origin point specified by `from`. Color 2 begins at the circle specified by the center point `to` and `radius`. Colors are gradually blended from the origin to the circle. The origin and the circle's center do not necessarily have to coincide, but the origin must be within the circle to avoid rendering problems.

func (*GraphicStream) MoveText 

func (ap *GraphicStream) MoveText(x, y Fl)

MoveText moves to the start of the next line, offset from the start of the current line.

func (*GraphicStream) NewlineShowText 

func (ap *GraphicStream) NewlineShowText(text string) error

NewlineShowText moves to the next line and shows text.

func (*GraphicStream) Ops 

func (ap *GraphicStream) Ops(op ...Operation)

Ops adds one or more graphic command. Some commands usually need to also update the state: see the other methods.

func (*GraphicStream) RestoreState 

func (ap *GraphicStream) RestoreState() error

RestoreState restores the graphic state. An error is returned (only) if the calls of SaveState and RestoreState are not balanced.

func (*GraphicStream) SaveState 

func (ap *GraphicStream) SaveState()

Saves the graphic state. SaveState and RestoreState must be balanced.

func (*GraphicStream) SetAlphaMask 

func (ap *GraphicStream) SetAlphaMask(transparency *model.XObjectForm)

SetAlphaMask adds the given `transparency` content as an alpha mask in the graphic state.

func (*GraphicStream) SetColorFill 

func (app *GraphicStream) SetColorFill(c color.Color)

func (*GraphicStream) SetColorStroke 

func (app *GraphicStream) SetColorStroke(c color.Color)

func (*GraphicStream) SetFillAlpha 

func (app *GraphicStream) SetFillAlpha(alpha Fl)

func (*GraphicStream) SetFontAndSize 

func (ap *GraphicStream) SetFontAndSize(font fonts.BuiltFont, size Fl)

SetFontAndSize sets the font and the size (in points) for the subsequent text writing.

func (*GraphicStream) SetGraphicState 

func (app *GraphicStream) SetGraphicState(state *model.GraphicState)

SetGraphicState register the given state and write it on the stream

func (*GraphicStream) SetLeading 

func (ap *GraphicStream) SetLeading(leading Fl)

SetLeading sets the text leading parameter, which is measured in text space units. It specifies the vertical distance between the baselines of adjacent lines of text.

func (*GraphicStream) SetStrokeAlpha 

func (app *GraphicStream) SetStrokeAlpha(alpha Fl)

func (*GraphicStream) SetTextMatrix 

func (ap *GraphicStream) SetTextMatrix(a, b, c, d, x, y Fl)

SetTextMatrix changes the text matrix. This operation also initializes the current point position.

func (*GraphicStream) Shading 

func (app *GraphicStream) Shading(sh *model.ShadingDict)

Shading register the given shading and apply it on the stream. It is a shortcut for `AddShading` followed by `Ops(OpShFill)`.

func (*GraphicStream) ShowText 

func (ap *GraphicStream) ShowText(text string) error

ShowText shows the `text`, after encoding it according to the current font. And error is returned (only) if a font has not been setup. A typical text drawing should apply the following methods ;

  • BeginText
  • SetFontAndSize
  • ShowText
  • EndText

func (GraphicStream) ToXFormObject 

func (ap GraphicStream) ToXFormObject(compress bool) *model.XObjectForm

ToXFormObject write the appearance to a new object, and associate it the resources, which are shallow copied. The content is optionaly compressed with the Flater filter.

func (*GraphicStream) Transform 

func (ap *GraphicStream) Transform(mat model.Matrix)

Transform changes the current matrix, by applying a Concat Op with the given `mat` and updating the current state.

type ImageColorSpace 

type ImageColorSpace interface {
	Write() string
	// contains filtered or unexported methods
}

ImageColorSpace is either:

  • a device color space
  • a limited form of Indexed colour space whose base colour space is a device space and whose colour table is specified by a byte string
  • a name

type ImageColorSpaceIndexed 

type ImageColorSpaceIndexed struct {
	Base   model.ColorSpaceName // required, must be a Device CS
	Lookup model.ColorTableBytes
	Hival  uint8
}

ImageColorSpaceIndexed is written in PDF as [/Indexed base hival lookup ]

func (ImageColorSpaceIndexed) ToColorSpace 

func (c ImageColorSpaceIndexed) ToColorSpace() model.ColorSpace

func (ImageColorSpaceIndexed) Write 

func (c ImageColorSpaceIndexed) Write() string

type ImageColorSpaceName 

type ImageColorSpaceName struct {
	model.ColorSpaceName
}

ImageColorSpaceName is a custom name or a device

func (ImageColorSpaceName) Write 

func (c ImageColorSpaceName) Write() string

type OpBeginIgnoreUndef 

type OpBeginIgnoreUndef struct{}

BX

func (OpBeginIgnoreUndef) Add 

func (o OpBeginIgnoreUndef) Add(out *bytes.Buffer)

EX

type OpBeginImage 

type OpBeginImage struct {
	ColorSpace ImageColorSpace
	Image      model.Image
}

BI ... ID ... EI

func (OpBeginImage) Add 

func (o OpBeginImage) Add(out *bytes.Buffer)

func (OpBeginImage) Metrics 

func (img OpBeginImage) Metrics(res model.ResourcesColorSpace) (comps, bits int, err error)

Metrics returns the number of color components and the number of bits for each. An error is returned if the color space can't be resolved from the resources dictionary.

type OpBeginMarkedContent 

type OpBeginMarkedContent struct {
	Properties PropertyList
	Tag        model.ObjName
}

BMC or BDC depending on Properties

func (OpBeginMarkedContent) Add 

func (o OpBeginMarkedContent) Add(out *bytes.Buffer)

type OpBeginText 

type OpBeginText struct{}

BT

func (OpBeginText) Add 

func (o OpBeginText) Add(out *bytes.Buffer)

type OpClip 

type OpClip struct{}

W

func (OpClip) Add 

func (o OpClip) Add(out *bytes.Buffer)

type OpCloseEOFillStroke 

type OpCloseEOFillStroke struct{}

b*

func (OpCloseEOFillStroke) Add 

func (o OpCloseEOFillStroke) Add(out *bytes.Buffer)

type OpCloseFillStroke 

type OpCloseFillStroke struct{}

b

func (OpCloseFillStroke) Add 

func (o OpCloseFillStroke) Add(out *bytes.Buffer)

type OpClosePath 

type OpClosePath struct{}

h

func (OpClosePath) Add 

func (o OpClosePath) Add(out *bytes.Buffer)

type OpCloseStroke 

type OpCloseStroke struct{}

s

func (OpCloseStroke) Add 

func (o OpCloseStroke) Add(out *bytes.Buffer)

type OpConcat 

type OpConcat struct {
	Matrix model.Matrix
}

cm

func (OpConcat) Add 

func (o OpConcat) Add(out *bytes.Buffer)

type OpCubicTo 

type OpCubicTo struct {
	// P1 et P2 are the control points
	X1, Y1, X2, Y2, X3, Y3 Fl
}

c

func (OpCubicTo) Add 

func (o OpCubicTo) Add(out *bytes.Buffer)

type OpCurveTo 

type OpCurveTo struct {
	// P1 is the control point
	X1, Y1, X3, Y3 Fl
}

y

func (OpCurveTo) Add 

func (o OpCurveTo) Add(out *bytes.Buffer)

type OpCurveTo1 

type OpCurveTo1 struct {
	// P2 is the control point
	X2, Y2, X3, Y3 Fl
}

v

func (OpCurveTo1) Add 

func (o OpCurveTo1) Add(out *bytes.Buffer)

type OpEOClip 

type OpEOClip struct{}

W*

func (OpEOClip) Add 

func (o OpEOClip) Add(out *bytes.Buffer)

type OpEOFill 

type OpEOFill struct{}

f*

func (OpEOFill) Add 

func (o OpEOFill) Add(out *bytes.Buffer)

type OpEOFillStroke 

type OpEOFillStroke struct{}

B*

func (OpEOFillStroke) Add 

func (o OpEOFillStroke) Add(out *bytes.Buffer)

type OpEndIgnoreUndef 

type OpEndIgnoreUndef struct{}

func (OpEndIgnoreUndef) Add 

func (o OpEndIgnoreUndef) Add(out *bytes.Buffer)

type OpEndMarkedContent 

type OpEndMarkedContent struct{}

EMC

func (OpEndMarkedContent) Add 

func (o OpEndMarkedContent) Add(out *bytes.Buffer)

type OpEndPath 

type OpEndPath struct{}

n OpEndPath is the same as new path.

func (OpEndPath) Add 

func (o OpEndPath) Add(out *bytes.Buffer)

type OpEndText 

type OpEndText struct{}

ET

func (OpEndText) Add 

func (o OpEndText) Add(out *bytes.Buffer)

type OpFill 

type OpFill struct{}

f

func (OpFill) Add 

func (o OpFill) Add(out *bytes.Buffer)

type OpFillStroke 

type OpFillStroke struct{}

B

func (OpFillStroke) Add 

func (o OpFillStroke) Add(out *bytes.Buffer)

type OpLineTo 

type OpLineTo struct {
	X, Y Fl
}

l

func (OpLineTo) Add 

func (o OpLineTo) Add(out *bytes.Buffer)

type OpMarkPoint 

type OpMarkPoint struct {
	Properties PropertyList // optional
	Tag        model.ObjName
}

MP or DP depending on Properties

func (OpMarkPoint) Add 

func (o OpMarkPoint) Add(out *bytes.Buffer)

type OpMoveSetShowText 

type OpMoveSetShowText struct {
	Text                          string // unescaped
	WordSpacing, CharacterSpacing Fl
}

\"

func (OpMoveSetShowText) Add 

func (o OpMoveSetShowText) Add(out *bytes.Buffer)

type OpMoveShowText 

type OpMoveShowText struct {
	Text string // unescaped
}

'

func (OpMoveShowText) Add 

func (o OpMoveShowText) Add(out *bytes.Buffer)

type OpMoveTo 

type OpMoveTo struct {
	X, Y Fl
}

m

func (OpMoveTo) Add 

func (o OpMoveTo) Add(out *bytes.Buffer)

type OpRectangle 

type OpRectangle struct {
	X, Y, W, H Fl
}

re

func (OpRectangle) Add 

func (o OpRectangle) Add(out *bytes.Buffer)

type OpRestore 

type OpRestore struct{}

Q

func (OpRestore) Add 

func (o OpRestore) Add(out *bytes.Buffer)

type OpSave 

type OpSave struct{}

q

func (OpSave) Add 

func (o OpSave) Add(out *bytes.Buffer)

type OpSetCacheDevice 

type OpSetCacheDevice struct {
	WX, WY, LLX, LLY, URX, URY int // glyph units
}

d1

func (OpSetCacheDevice) Add 

func (o OpSetCacheDevice) Add(out *bytes.Buffer)

type OpSetCharSpacing 

type OpSetCharSpacing struct {
	CharSpace Fl
}

Tc

func (OpSetCharSpacing) Add 

func (o OpSetCharSpacing) Add(out *bytes.Buffer)

type OpSetCharWidth 

type OpSetCharWidth struct {
	WX, WY int // glyph units
}

d0

func (OpSetCharWidth) Add 

func (o OpSetCharWidth) Add(out *bytes.Buffer)

type OpSetDash 

type OpSetDash struct {
	Dash model.DashPattern
}

d

func (OpSetDash) Add 

func (o OpSetDash) Add(out *bytes.Buffer)

type OpSetExtGState 

type OpSetExtGState struct {
	Dict model.ObjName
}

gs

func (OpSetExtGState) Add 

func (o OpSetExtGState) Add(out *bytes.Buffer)

type OpSetFillCMYKColor 

type OpSetFillCMYKColor struct {
	C, M, Y, K Fl
}

k

func (OpSetFillCMYKColor) Add 

func (o OpSetFillCMYKColor) Add(out *bytes.Buffer)

type OpSetFillColor 

type OpSetFillColor struct {
	Color []Fl
}

sc

func (OpSetFillColor) Add 

func (o OpSetFillColor) Add(out *bytes.Buffer)

type OpSetFillColorN 

type OpSetFillColorN struct {
	Pattern model.ObjName // optional
	Color   []Fl
}

scn

func (OpSetFillColorN) Add 

func (o OpSetFillColorN) Add(out *bytes.Buffer)

type OpSetFillColorSpace 

type OpSetFillColorSpace OpSetStrokeColorSpace

cs

func (OpSetFillColorSpace) Add 

func (o OpSetFillColorSpace) Add(out *bytes.Buffer)

type OpSetFillGray 

type OpSetFillGray struct {
	G Fl
}

g

func (OpSetFillGray) Add 

func (o OpSetFillGray) Add(out *bytes.Buffer)

type OpSetFillRGBColor 

type OpSetFillRGBColor struct {
	R, G, B Fl
}

rg

func (OpSetFillRGBColor) Add 

func (o OpSetFillRGBColor) Add(out *bytes.Buffer)

type OpSetFlat 

type OpSetFlat struct {
	Flatness Fl // between 0 to 100
}

i

func (OpSetFlat) Add 

func (o OpSetFlat) Add(out *bytes.Buffer)

type OpSetFont 

type OpSetFont struct {
	Font model.ObjName
	Size Fl
}

Tf

func (OpSetFont) Add 

func (o OpSetFont) Add(out *bytes.Buffer)

type OpSetHorizScaling 

type OpSetHorizScaling struct {
	Scale Fl
}

Tz

func (OpSetHorizScaling) Add 

func (o OpSetHorizScaling) Add(out *bytes.Buffer)

type OpSetLineCap 

type OpSetLineCap struct {
	Style uint8
}

J

func (OpSetLineCap) Add 

func (o OpSetLineCap) Add(out *bytes.Buffer)

type OpSetLineJoin 

type OpSetLineJoin struct {
	Style uint8
}

j

func (OpSetLineJoin) Add 

func (o OpSetLineJoin) Add(out *bytes.Buffer)

type OpSetLineWidth 

type OpSetLineWidth struct {
	W Fl
}

w

func (OpSetLineWidth) Add 

func (o OpSetLineWidth) Add(out *bytes.Buffer)

type OpSetMiterLimit 

type OpSetMiterLimit struct {
	Limit Fl
}

M

func (OpSetMiterLimit) Add 

func (o OpSetMiterLimit) Add(out *bytes.Buffer)

type OpSetRenderingIntent 

type OpSetRenderingIntent struct {
	Intent model.ObjName
}

ri

func (OpSetRenderingIntent) Add 

func (o OpSetRenderingIntent) Add(out *bytes.Buffer)

type OpSetStrokeCMYKColor 

type OpSetStrokeCMYKColor OpSetFillCMYKColor

K

func (OpSetStrokeCMYKColor) Add 

func (o OpSetStrokeCMYKColor) Add(out *bytes.Buffer)

type OpSetStrokeColor 

type OpSetStrokeColor OpSetFillColor

SC

func (OpSetStrokeColor) Add 

func (o OpSetStrokeColor) Add(out *bytes.Buffer)

type OpSetStrokeColorN 

type OpSetStrokeColorN OpSetFillColorN

SCN

func (OpSetStrokeColorN) Add 

func (o OpSetStrokeColorN) Add(out *bytes.Buffer)

type OpSetStrokeColorSpace 

type OpSetStrokeColorSpace struct {
	ColorSpace model.ColorSpaceName // either a ColorSpaceName, or a name of a resource
}

CS

func (OpSetStrokeColorSpace) Add 

func (o OpSetStrokeColorSpace) Add(out *bytes.Buffer)

type OpSetStrokeGray 

type OpSetStrokeGray OpSetFillGray

G

func (OpSetStrokeGray) Add 

func (o OpSetStrokeGray) Add(out *bytes.Buffer)

type OpSetStrokeRGBColor 

type OpSetStrokeRGBColor OpSetFillRGBColor

RG

func (OpSetStrokeRGBColor) Add 

func (o OpSetStrokeRGBColor) Add(out *bytes.Buffer)

type OpSetTextLeading 

type OpSetTextLeading struct {
	L Fl
}

TL

func (OpSetTextLeading) Add 

func (o OpSetTextLeading) Add(out *bytes.Buffer)

type OpSetTextMatrix 

type OpSetTextMatrix struct {
	Matrix model.Matrix
}

Tm

func (OpSetTextMatrix) Add 

func (o OpSetTextMatrix) Add(out *bytes.Buffer)

type OpSetTextRender 

type OpSetTextRender struct {
	Render uint8
}

Tr

func (OpSetTextRender) Add 

func (o OpSetTextRender) Add(out *bytes.Buffer)

type OpSetTextRise 

type OpSetTextRise struct {
	Rise Fl
}

Ts

func (OpSetTextRise) Add 

func (o OpSetTextRise) Add(out *bytes.Buffer)

type OpSetWordSpacing 

type OpSetWordSpacing struct {
	WordSpace Fl
}

Tw

func (OpSetWordSpacing) Add 

func (o OpSetWordSpacing) Add(out *bytes.Buffer)

type OpShFill 

type OpShFill struct {
	Shading model.ObjName
}

sh

func (OpShFill) Add 

func (o OpShFill) Add(out *bytes.Buffer)

type OpShowSpaceGlyph 

type OpShowSpaceGlyph struct {
	Glyphs []SpacedGlyph
}

TJ - OpShowSpaceGlyph is the same as OpShowSpaceText but with input specified as glyph number. This should be used in conjonction with a font using an identity encoding

func (OpShowSpaceGlyph) Add 

func (o OpShowSpaceGlyph) Add(out *bytes.Buffer)

type OpShowSpaceText 

type OpShowSpaceText struct {
	// Texts store a "normalized version" of texts and spaces
	// SpaceSubtractedAfter fields of 0 are ignored.
	Texts []pdfFonts.TextSpaced
}

TJ - OpShowSpaceText enables font kerning

func (OpShowSpaceText) Add 

func (o OpShowSpaceText) Add(out *bytes.Buffer)

type OpShowText 

type OpShowText struct {
	Text string // unescaped
}

Tj

func (OpShowText) Add 

func (o OpShowText) Add(out *bytes.Buffer)

type OpStroke 

type OpStroke struct{}

S

func (OpStroke) Add 

func (o OpStroke) Add(out *bytes.Buffer)

type OpTextMove 

type OpTextMove struct {
	X, Y Fl
}

Td

func (OpTextMove) Add 

func (o OpTextMove) Add(out *bytes.Buffer)

type OpTextMoveSet 

type OpTextMoveSet OpTextMove

TD

func (OpTextMoveSet) Add 

func (o OpTextMoveSet) Add(out *bytes.Buffer)

type OpTextNextLine 

type OpTextNextLine struct{}

T*

func (OpTextNextLine) Add 

func (o OpTextNextLine) Add(out *bytes.Buffer)

type OpXObject 

type OpXObject struct {
	XObject model.ObjName
}

Do

func (OpXObject) Add 

func (o OpXObject) Add(out *bytes.Buffer)

type Operation 

type Operation interface {
	Add(out *bytes.Buffer)
}

Operation is a command and its related arguments.

func RoundedRectPath 

func RoundedRectPath(x, y, w, h, rTL, rTR, rBR, rBL model.Fl) []Operation

RoundedRectPath returns a rectangle path with rounded corners. The rectangle is of width `w` and height `h`. Its upper left corner is positioned at point (`x`, `y`). The radius for each corner are given by `rTL` (top-left), `rTR` (top-right) `rBR` (bottom-right), `rBL` (bottom-left) (0 means square corners)

type PropertyList 

type PropertyList interface {
	// contains filtered or unexported methods
}

PropertyList should be either a Name (refering to the resources dict) or dict object.

type PropertyListDict 

type PropertyListDict model.ObjDict

PropertyListDict is a dictionary, where indirect references and streams are not allowed.

type PropertyListName 

type PropertyListName model.ObjName

type RGB 

type RGB [3]uint8

type RenderingDPI 

type RenderingDPI Fl

RenderingDPI specifies a length in DPI

type RenderingDims 

type RenderingDims struct {
	Width, Height RenderingSize // See EffectiveSize()
}

RenderingDims defines the size of an image in the page. PDF image objects don't contain such information, which are added via a tranformation matrix associated to the image.

func (RenderingDims) EffectiveSize 

func (r RenderingDims) EffectiveSize(img *model.XObjectImage) (width Fl, height Fl)

EffectiveSize performs automatic width and height calculation.

Only the width and height (in terms of columns and rows) of `img` are used.

If both `Width` and `Height` are nil, the image is rendered at 96 dpi. If either `Width` or `Height` is nil, it will be calculated from the other dimension so that the aspect ratio is maintained. Otherwise, `Width` or `Height` may be a dpi or a length.

type RenderingLength 

type RenderingLength Fl

RenderingLength specifies a length in user space units.

type RenderingSize 

type RenderingSize interface {
	// contains filtered or unexported methods
}

RenderingSize is either RenderingDPI or RenderingLength.

type SpacedGlyph 

type SpacedGlyph struct {
	SpaceSubtractedBefore int
	GID                   uint32 // will be hex encoded in the content stream
	SpaceSubtractedAfter  int
}

TJ - OpShowSpaceGlyphs enables font kerning

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