Noah Petherbridge
0c6c77a423
* Add initial Ellipse Tool to the Editor Mode. Currently there's something wrong with the algorithm and the ellipses have a sort of 'lemon shape' to them. * Refactor the IterLine/IterLine2 functions to be more consistent. IterLine used to be the raw algorithm that took a bunch of coordinate numbers and IterLine2 took two render.Point's and was the main one used throughout the app. Now, IterLine takes the two Points and the raw algorithm function removed.
113 lines
2.4 KiB
Go
113 lines
2.4 KiB
Go
package level
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import "git.kirsle.net/apps/doodle/lib/render"
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// DefaultPalette returns a sensible default palette.
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func DefaultPalette() *Palette {
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return &Palette{
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Swatches: []*Swatch{
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&Swatch{
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Name: "solid",
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Color: render.Black,
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Solid: true,
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},
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&Swatch{
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Name: "decoration",
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Color: render.Grey,
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},
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&Swatch{
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Name: "fire",
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Color: render.Red,
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Fire: true,
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},
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&Swatch{
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Name: "water",
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Color: render.RGBA(0, 0, 255, 180),
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Water: true,
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},
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},
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}
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}
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// NewBlueprintPalette returns the blueprint theme's color palette.
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func NewBlueprintPalette() *Palette {
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return &Palette{
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Swatches: []*Swatch{
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&Swatch{
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Name: "solid",
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Color: render.RGBA(254, 254, 254, 255),
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Solid: true,
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},
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&Swatch{
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Name: "decoration",
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Color: render.Grey,
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},
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&Swatch{
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Name: "fire",
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Color: render.RGBA(255, 80, 0, 255),
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Fire: true,
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},
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&Swatch{
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Name: "water",
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Color: render.RGBA(0, 153, 255, 255),
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Water: true,
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},
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&Swatch{
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Name: "electric",
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Color: render.RGBA(255, 255, 0, 255),
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Solid: true,
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},
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},
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}
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}
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// NewPalette initializes a blank palette.
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func NewPalette() *Palette {
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return &Palette{
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Swatches: []*Swatch{},
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byName: map[string]int{},
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}
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}
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// Palette holds an index of colors used in a drawing.
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type Palette struct {
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Swatches []*Swatch `json:"swatches"`
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// Private runtime values
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ActiveSwatch *Swatch `json:"-"` // name of the actively selected color
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byName map[string]int // Cache map of swatches by name
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}
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// Inflate the palette swatch caches. Always call this method after you have
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// initialized the palette (i.e. loaded it from JSON); this will update the
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// "color by name" cache and assign the index numbers to each swatch.
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func (p *Palette) Inflate() {
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p.update()
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}
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// Get a swatch by name.
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func (p *Palette) Get(name string) (result *Swatch, exists bool) {
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p.update()
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if index, ok := p.byName[name]; ok && index < len(p.Swatches) {
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result = p.Swatches[index]
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exists = true
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}
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return
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}
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// update the internal caches and such.
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func (p *Palette) update() {
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// Initialize the name cache if nil or if the size disagrees with the
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// length of the swatches available.
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if p.byName == nil || len(p.byName) != len(p.Swatches) {
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// Initialize the name cache.
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p.byName = map[string]int{}
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for i, swatch := range p.Swatches {
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swatch.index = i
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p.byName[swatch.Name] = i
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}
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}
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}
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