draw2d/gc.go
2015-07-08 00:42:00 +02:00

59 lines
1.6 KiB
Go

// Copyright 2010 The draw2d Authors. All rights reserved.
// created: 21/11/2010 by Laurent Le Goff
package draw2d
import (
"image"
"image/color"
)
// FillRule defines the type for fill rules
type FillRule int
const (
// FillRuleEvenOdd defines the even odd filling rule
FillRuleEvenOdd FillRule = iota
// FillRuleWinding defines the non zero winding rule
FillRuleWinding
)
// GraphicContext describes the interface for the various backends (images, pdf, opengl, ...)
type GraphicContext interface {
Path
// Create a new path
BeginPath()
GetMatrixTransform() MatrixTransform
SetMatrixTransform(tr MatrixTransform)
ComposeMatrixTransform(tr MatrixTransform)
Rotate(angle float64)
Translate(tx, ty float64)
Scale(sx, sy float64)
SetStrokeColor(c color.Color)
SetFillColor(c color.Color)
SetFillRule(f FillRule)
SetLineWidth(lineWidth float64)
SetLineCap(cap Cap)
SetLineJoin(join Join)
SetLineDash(dash []float64, dashOffset float64)
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
GetStringBounds(s string) (left, top, right, bottom float64)
CreateStringPath(text string, x, y float64) (cursor float64)
FillString(text string) (cursor float64)
FillStringAt(text string, x, y float64) (cursor float64)
StrokeString(text string) (cursor float64)
StrokeStringAt(text string, x, y float64) (cursor float64)
Stroke(paths ...*PathStorage)
Fill(paths ...*PathStorage)
FillStroke(paths ...*PathStorage)
}