69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
package artist
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import "image"
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import "image/color"
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// Uniform is an infinite-sized pattern of uniform color. It implements the
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// Pattern, color.Color, color.Model, and image.Image interfaces.
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type Uniform color.RGBA
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// NewUniform returns a new Uniform pattern of the given color.
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func NewUniform (c color.Color) (uniform Uniform) {
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r, g, b, a := c.RGBA()
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uniform.R = uint8(r >> 8)
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uniform.G = uint8(g >> 8)
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uniform.B = uint8(b >> 8)
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uniform.A = uint8(a >> 8)
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return
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}
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func hex (color uint32) (c color.RGBA) {
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c.A = uint8(color)
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c.B = uint8(color >> 8)
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c.G = uint8(color >> 16)
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c.R = uint8(color >> 24)
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return
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}
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// Uhex creates a new Uniform pattern from an RGBA integer value.
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func Uhex (color uint32) (uniform Uniform) {
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return NewUniform(hex(color))
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}
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// ColorModel satisfies the image.Image interface.
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func (uniform Uniform) ColorModel () (model color.Model) {
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return uniform
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}
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// Convert satisfies the color.Model interface.
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func (uniform Uniform) Convert (in color.Color) (c color.Color) {
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return color.RGBA(uniform)
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}
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// Bounds satisfies the image.Image interface.
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func (uniform Uniform) Bounds () (rectangle image.Rectangle) {
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rectangle.Min = image.Point { -1e9, -1e9 }
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rectangle.Max = image.Point { 1e9, 1e9 }
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return
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}
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// At satisfies the image.Image interface.
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func (uniform Uniform) At (x, y int) (c color.Color) {
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return color.RGBA(uniform)
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}
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// AtWhen satisfies the Pattern interface.
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func (uniform Uniform) AtWhen (x, y, width, height int) (c color.RGBA) {
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return color.RGBA(uniform)
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}
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// RGBA satisfies the color.Color interface.
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func (uniform Uniform) RGBA () (r, g, b, a uint32) {
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return color.RGBA(uniform).RGBA()
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}
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// Opaque scans the entire image and reports whether it is fully opaque.
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func (uniform Uniform) Opaque () (opaque bool) {
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return uniform.A == 0xFF
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}
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