draw2d/gc.go

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// Copyright 2010 The draw2d Authors. All rights reserved.
// created: 21/11/2010 by Laurent Le Goff
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package draw2d
import (
"image"
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"image/color"
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)
type GraphicContext interface {
PathBuilder
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// BeginPath creates a new path
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BeginPath()
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// GetMatrixTransform returns the current transformation matrix
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GetMatrixTransform() Matrix
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// SetMatrixTransform sets the current transformation matrix
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SetMatrixTransform(tr Matrix)
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// ComposeMatrixTransform composes the current transformation matrix with tr
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ComposeMatrixTransform(tr Matrix)
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// Rotate applies a rotation to the current transformation matrix. angle is in radian.
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Rotate(angle float64)
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// Translate applies a translation to the current transformation matrix.
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Translate(tx, ty float64)
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// Scale applies a scale to the current transformation matrix.
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Scale(sx, sy float64)
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// SetStrokeColor sets the current stroke color
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SetStrokeColor(c color.Color)
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// SetStrokeColor sets the current fill color
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SetFillColor(c color.Color)
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// SetFillRule sets the current fill rule
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SetFillRule(f FillRule)
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// SetLineWidth sets the current line width
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SetLineWidth(lineWidth float64)
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// SetLineCap sets the current line cap
SetLineCap(cap LineCap)
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// SetLineJoin sets the current line join
SetLineJoin(join LineJoin)
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// SetLineJoin sets the current dash
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SetLineDash(dash []float64, dashOffset float64)
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// SetFontSize
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SetFontSize(fontSize float64)
GetFontSize() float64
SetFontData(fontData FontData)
GetFontData() FontData
DrawImage(image image.Image)
Save()
Restore()
Clear()
ClearRect(x1, y1, x2, y2 int)
SetDPI(dpi int)
GetDPI() int
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GetStringBounds(s string) (left, top, right, bottom float64)
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CreateStringPath(text string, x, y float64) (cursor float64)
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FillString(text string) (cursor float64)
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FillStringAt(text string, x, y float64) (cursor float64)
StrokeString(text string) (cursor float64)
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StrokeStringAt(text string, x, y float64) (cursor float64)
Stroke(paths ...*Path)
Fill(paths ...*Path)
FillStroke(paths ...*Path)
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}