63 lines
2.1 KiB
Go
63 lines
2.1 KiB
Go
// Copyright 2010 The draw2d Authors. All rights reserved.
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// created: 21/11/2010 by Laurent Le Goff
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package draw2d
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import (
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"image"
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"image/color"
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)
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// GraphicContext describes the interface for the various backends (images, pdf, opengl, ...)
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type GraphicContext interface {
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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
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SetLineCap(cap LineCap)
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// SetLineJoin sets the current line join
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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)
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GetFontSize() float64
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SetFontData(fontData FontData)
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GetFontData() FontData
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DrawImage(image image.Image)
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Save()
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Restore()
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Clear()
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ClearRect(x1, y1, x2, y2 int)
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SetDPI(dpi int)
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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)
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StrokeString(text string) (cursor float64)
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StrokeStringAt(text string, x, y float64) (cursor float64)
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Stroke(paths ...*Path)
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Fill(paths ...*Path)
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FillStroke(paths ...*Path)
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}
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