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path: root/vendor/github.com/fogleman/gg/context.go
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Diffstat (limited to 'vendor/github.com/fogleman/gg/context.go')
-rw-r--r--vendor/github.com/fogleman/gg/context.go136
1 files changed, 83 insertions, 53 deletions
diff --git a/vendor/github.com/fogleman/gg/context.go b/vendor/github.com/fogleman/gg/context.go
index e186027..c3b44f2 100644
--- a/vendor/github.com/fogleman/gg/context.go
+++ b/vendor/github.com/fogleman/gg/context.go
@@ -44,26 +44,33 @@ const (
AlignRight
)
+var (
+ defaultFillStyle = NewSolidPattern(color.White)
+ defaultStrokeStyle = NewSolidPattern(color.Black)
+)
+
type Context struct {
- width int
- height int
- im *image.RGBA
- mask *image.Alpha
- color color.Color
- strokePath raster.Path
- fillPath raster.Path
- start Point
- current Point
- hasCurrent bool
- dashes []float64
- lineWidth float64
- lineCap LineCap
- lineJoin LineJoin
- fillRule FillRule
- fontFace font.Face
- fontHeight float64
- matrix Matrix
- stack []*Context
+ width int
+ height int
+ im *image.RGBA
+ mask *image.Alpha
+ color color.Color
+ fillPattern Pattern
+ strokePattern Pattern
+ strokePath raster.Path
+ fillPath raster.Path
+ start Point
+ current Point
+ hasCurrent bool
+ dashes []float64
+ lineWidth float64
+ lineCap LineCap
+ lineJoin LineJoin
+ fillRule FillRule
+ fontFace font.Face
+ fontHeight float64
+ matrix Matrix
+ stack []*Context
}
// NewContext creates a new image.RGBA with the specified width and height
@@ -82,15 +89,17 @@ func NewContextForImage(im image.Image) *Context {
// No copy is made.
func NewContextForRGBA(im *image.RGBA) *Context {
return &Context{
- width: im.Bounds().Size().X,
- height: im.Bounds().Size().Y,
- im: im,
- color: color.Transparent,
- lineWidth: 1,
- fillRule: FillRuleWinding,
- fontFace: basicfont.Face7x13,
- fontHeight: 13,
- matrix: Identity(),
+ width: im.Bounds().Size().X,
+ height: im.Bounds().Size().Y,
+ im: im,
+ color: color.Transparent,
+ fillPattern: defaultFillStyle,
+ strokePattern: defaultStrokeStyle,
+ lineWidth: 1,
+ fillRule: FillRuleWinding,
+ fontFace: basicfont.Face7x13,
+ fontHeight: 13,
+ matrix: Identity(),
}
}
@@ -172,9 +181,29 @@ func (dc *Context) SetFillRuleEvenOdd() {
// Color Setters
-// SetColor sets the current color.
-func (dc *Context) SetColor(c color.Color) {
+func (dc *Context) setFillAndStrokeColor(c color.Color) {
dc.color = c
+ dc.fillPattern = NewSolidPattern(c)
+ dc.strokePattern = NewSolidPattern(c)
+}
+
+// SetFillStyle sets current fill style
+func (dc *Context) SetFillStyle(pattern Pattern) {
+ // if pattern is SolidPattern, also change dc.color(for dc.Clear, dc.drawString)
+ if fillStyle, ok := pattern.(*solidPattern); ok {
+ dc.color = fillStyle.color
+ }
+ dc.fillPattern = pattern
+}
+
+// SetStrokeStyle sets current stroke style
+func (dc *Context) SetStrokeStyle(pattern Pattern) {
+ dc.strokePattern = pattern
+}
+
+// SetColor sets the current color(for both fill and stroke).
+func (dc *Context) SetColor(c color.Color) {
+ dc.setFillAndStrokeColor(c)
}
// SetHexColor sets the current color using a hex string. The leading pound
@@ -189,6 +218,7 @@ func (dc *Context) SetHexColor(x string) {
// 255, inclusive.
func (dc *Context) SetRGBA255(r, g, b, a int) {
dc.color = color.NRGBA{uint8(r), uint8(g), uint8(b), uint8(a)}
+ dc.setFillAndStrokeColor(dc.color)
}
// SetRGB255 sets the current color. r, g, b values should be between 0 and 255,
@@ -206,6 +236,7 @@ func (dc *Context) SetRGBA(r, g, b, a float64) {
uint8(b * 255),
uint8(a * 255),
}
+ dc.setFillAndStrokeColor(dc.color)
}
// SetRGB sets the current color. r, g, b values should be between 0 and 1,
@@ -371,17 +402,8 @@ func (dc *Context) fill(painter raster.Painter) {
// line cap, line join and dash settings. The path is preserved after this
// operation.
func (dc *Context) StrokePreserve() {
- if dc.mask == nil {
- painter := raster.NewRGBAPainter(dc.im)
- painter.SetColor(dc.color)
- dc.stroke(painter)
- } else {
- im := image.NewRGBA(image.Rect(0, 0, dc.width, dc.height))
- painter := raster.NewRGBAPainter(im)
- painter.SetColor(dc.color)
- dc.stroke(painter)
- draw.DrawMask(dc.im, dc.im.Bounds(), im, image.ZP, dc.mask, image.ZP, draw.Over)
- }
+ painter := newPatternPainter(dc.im, dc.mask, dc.strokePattern)
+ dc.stroke(painter)
}
// Stroke strokes the current path with the current color, line width,
@@ -395,17 +417,8 @@ func (dc *Context) Stroke() {
// FillPreserve fills the current path with the current color. Open subpaths
// are implicity closed. The path is preserved after this operation.
func (dc *Context) FillPreserve() {
- if dc.mask == nil {
- painter := raster.NewRGBAPainter(dc.im)
- painter.SetColor(dc.color)
- dc.fill(painter)
- } else {
- im := image.NewRGBA(image.Rect(0, 0, dc.width, dc.height))
- painter := raster.NewRGBAPainter(im)
- painter.SetColor(dc.color)
- dc.fill(painter)
- draw.DrawMask(dc.im, dc.im.Bounds(), im, image.ZP, dc.mask, image.ZP, draw.Over)
- }
+ painter := newPatternPainter(dc.im, dc.mask, dc.fillPattern)
+ dc.fill(painter)
}
// Fill fills the current path with the current color. Open subpaths
@@ -452,6 +465,22 @@ func (dc *Context) Clear() {
draw.Draw(dc.im, dc.im.Bounds(), src, image.ZP, draw.Src)
}
+// SetPixel sets the color of the specified pixel using the current color.
+func (dc *Context) SetPixel(x, y int) {
+ dc.im.Set(x, y, dc.color)
+}
+
+// DrawPoint is like DrawCircle but ensures that a circle of the specified
+// size is drawn regardless of the current transformation matrix. The position
+// is still transformed, but not the shape of the point.
+func (dc *Context) DrawPoint(x, y, r float64) {
+ dc.Push()
+ tx, ty := dc.TransformPoint(x, y)
+ dc.Identity()
+ dc.DrawCircle(tx, ty, r)
+ dc.Pop()
+}
+
func (dc *Context) DrawLine(x1, y1, x2, y2 float64) {
dc.MoveTo(x1, y1)
dc.LineTo(x2, y2)
@@ -560,10 +589,11 @@ func (dc *Context) DrawImageAnchored(im image.Image, x, y int, ax, ay float64) {
func (dc *Context) SetFontFace(fontFace font.Face) {
dc.fontFace = fontFace
+ dc.fontHeight = float64(fontFace.Metrics().Height) / 64
}
func (dc *Context) LoadFontFace(path string, points float64) error {
- face, err := loadFontFace(path, points)
+ face, err := LoadFontFace(path, points)
if err == nil {
dc.fontFace = face
dc.fontHeight = points * 72 / 96
generated by cgit v1.2.3 (git 2.25.1) at 2026-02-10 11:18:11 +0000