clean Api

graphics.go

@@ -78,26 +78,84 @@ type SolidFillStyle struct {
 	FillRule FillRule
 }
 
-type VerticalAlign int
+// Vertical Alignment of the text
+type Valign int
 
-type HorizontalAlign int
+const (
+	ValignTop Valign = iota
+	ValignTopCenter
+	ValignTopBottom
+	ValignTopBaseline
+)
+
+// Horizontal Alignment of the text
+type Halign int
+
+const (
+	HalignLeft = iota
+	HalignCenter
+	HalignRight
+)
+
+type ScalingPolicy int
+
+const (
+	// ScalingNone no scaling applied
+	ScalingNone = iota
+	// ScalingStretch the image is stretched so that its width and height are exactly the given width and height
+	ScalingStretch
+	// ScalingWidth the image is scaled so that its width is exactly the given width
+	ScalingWidth
+	// ScalingHeight the image is scaled so that its height is exactly the given height
+	ScalingHeight
+	// ScalingFit the image is scaled to the largest scale that allow the image to fit within a rectangle width x height
+	ScalingFit
+	// ScalingSameArea the image is scaled so that its area is exactly the area of the given rectangle width x height
+	ScalingSameArea
+	// ScalingFill the image is scaled to the smallest scale that allow the image to fully cover a rectangle width x height
+	ScalingFill
+)
 
 // TextStyle
 type TextStyle struct {
 	// Color defines the color of text
 	Color color.Color
+	// Size font size
+	Size float64
 	// The font to use
 	Font FontData
 	// Horizontal Alignment of the text
-	HorizontalAlign HorizontalAlign
+	Halign Halign
 	// Vertical Alignment of the text
-	VerticalAlign VerticalAlign
+	Valign Valign
+}
+
+// ImageStyle style attributes used to display the image
+type ImageStyle struct {
+	// Horizontal Alignment of the image
+	Halign Halign
+	// Vertical Alignment of the image
+	Valign Valign
+	// Width Height used by scaling policy
+	Width, Height float64
+	// ScalingPolicy defines the scaling policy to applied to the image
+	ScalingPolicy ScalingPolicy
+}
+
+// Style defines properties that
+type Style struct {
+	MatrixTransform MatrixTransform
+	StrokeStyle     StrokeStyle
+	FillStyle       FillStyle
+	TextStyle       TextStyle
+	ImageStyle      TextStyle
 }
 
 // Drawer can fill and stroke a path
 type Drawer interface {
-	setMatrix(MatrixTransform)
-	Fill(FillStyle, Path)
-	Stroke(StrokeStyle, Path)
-	Text(TextStyle, text string, x, y float64)
+	Style() *Style
+	Fill(Path)
+	Stroke(Path)
+	Text(text string, x, y float64)
+	Image(image image.Image, x, y float64)
 }