package d2ui import ( "image/color" "github.com/OpenDiablo2/OpenDiablo2/d2core/d2render" ) // LabelAlignment represents a label's alignment type LabelAlignment uint8 const ( // LabelAlignLeft represents a left-aligned label LabelAlignLeft LabelAlignment = 0 // LabelAlignCenter represents a center-aligned label LabelAlignCenter LabelAlignment = 1 // LabelAlignRight represents a right-aligned label LabelAlignRight LabelAlignment = 2 ) // Label represents a user interface label type Label struct { text string X int Y int Width int Height int Alignment LabelAlignment font *Font imageData d2render.Surface Color color.Color } // CreateLabel creates a new instance of a UI label func CreateLabel(fontPath, palettePath string) Label { result := Label{ Alignment: LabelAlignLeft, Color: color.White, font: GetFont(fontPath, palettePath), } return result } // Render draws the label on the screen func (v *Label) Render(target d2render.Surface) { if len(v.text) == 0 { return } v.cacheImage() x, y := v.X, v.Y if v.Alignment == LabelAlignCenter { x, y = v.X-v.Width/2, v.Y } else if v.Alignment == LabelAlignRight { x, y = v.X-v.Width, v.Y } target.PushFilter(d2render.FilterNearest) target.PushCompositeMode(d2render.CompositeModeSourceAtop) target.PushTranslation(x, y) defer target.PopN(3) target.Render(v.imageData) } // SetPosition moves the label to the specified location func (v *Label) SetPosition(x, y int) { v.X = x v.Y = y } func (v *Label) GetTextMetrics(text string) (width, height int) { return v.font.GetTextMetrics(text) } func (v *Label) cacheImage() { if v.imageData != nil { return } width, height := v.font.GetTextMetrics(v.text) v.Width = width v.Height = height v.imageData, _ = d2render.NewSurface(width, height, d2render.FilterNearest) surface, _ := d2render.CreateSurface(v.imageData) v.font.Render(0, 0, v.text, v.Color, surface) } // SetText sets the label's text func (v *Label) SetText(newText string) { if v.text == newText { return } v.text = newText v.imageData = nil } // GetSize returns the size of the label func (v Label) GetSize() (width, height int) { v.cacheImage() width = v.Width height = v.Height return }