IliaDenisov
94 lines
2.8 KiB
Go
94 lines
2.8 KiB
Go
package world
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import (
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"image"
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"image/color"
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)
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// BackgroundTileMode defines how the background image is tiled.
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type BackgroundTileMode uint8
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const (
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BackgroundTileNone BackgroundTileMode = iota
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BackgroundTileRepeat
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)
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// BackgroundAnchorMode defines whether the background image scrolls with the world or stays fixed to viewport.
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type BackgroundAnchorMode uint8
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const (
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BackgroundAnchorWorld BackgroundAnchorMode = iota
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BackgroundAnchorViewport
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)
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// BackgroundScaleMode defines how the background image is scaled.
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// (Step 1: defined for API completeness; used later when rendering background image.)
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type BackgroundScaleMode uint8
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const (
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BackgroundScaleNone BackgroundScaleMode = iota
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BackgroundScaleFit
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BackgroundScaleFill
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)
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// StyleTheme describes a cohesive style set (theme) for rendering.
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// Step 1: we store it in World and use it for background and default base styles.
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// Step 2+: theme-relative overrides and background image drawing.
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type StyleTheme interface {
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ID() string
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Name() string
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BackgroundColor() color.Color
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BackgroundImage() image.Image
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BackgroundTileMode() BackgroundTileMode
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BackgroundScaleMode() BackgroundScaleMode
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BackgroundAnchorMode() BackgroundAnchorMode
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PointStyle() Style
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LineStyle() Style
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CircleStyle() Style
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// Class overrides (relative to base kind style).
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// Return (override, true) when class is supported; (zero, false) means "no override".
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PointClassOverride(class PointClassID) (StyleOverride, bool)
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LineClassOverride(class LineClassID) (StyleOverride, bool)
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CircleClassOverride(class CircleClassID) (StyleOverride, bool)
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}
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// DefaultTheme is a conservative theme matching built-in default styles.
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type DefaultTheme struct{}
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func (DefaultTheme) ID() string { return "default" }
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func (DefaultTheme) Name() string { return "Default" }
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func (DefaultTheme) BackgroundColor() color.Color { return color.RGBA{A: 255} }
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func (DefaultTheme) BackgroundImage() image.Image { return nil }
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func (DefaultTheme) BackgroundTileMode() BackgroundTileMode { return BackgroundTileNone }
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func (DefaultTheme) BackgroundScaleMode() BackgroundScaleMode { return BackgroundScaleNone }
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func (DefaultTheme) BackgroundAnchorMode() BackgroundAnchorMode { return BackgroundAnchorWorld }
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func (DefaultTheme) PointStyle() Style {
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s, _ := NewStyleTable().Get(StyleIDDefaultPoint)
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return s
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}
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func (DefaultTheme) LineStyle() Style {
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s, _ := NewStyleTable().Get(StyleIDDefaultLine)
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return s
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}
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func (DefaultTheme) CircleStyle() Style {
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s, _ := NewStyleTable().Get(StyleIDDefaultCircle)
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return s
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}
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func (DefaultTheme) PointClassOverride(PointClassID) (StyleOverride, bool) {
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return StyleOverride{}, false
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}
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func (DefaultTheme) LineClassOverride(LineClassID) (StyleOverride, bool) {
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return StyleOverride{}, false
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}
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func (DefaultTheme) CircleClassOverride(CircleClassID) (StyleOverride, bool) {
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return StyleOverride{}, false
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}
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