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77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
8 years ago
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package rgbmatrix
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import (
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"image"
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"image/color"
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"image/draw"
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)
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// Canvas is a image.Image representation of a WS281x matrix, it implements
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// image.Image interface and can be used with draw.Draw for example
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type Canvas struct {
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w, h int
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m Matrix
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closed bool
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}
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// NewCanvas returns a new Canvas using the given width and height and creates
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// a new WS281x matrix using the given config
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func NewCanvas(m Matrix) *Canvas {
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w, h := m.Geometry()
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return &Canvas{
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w: w,
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h: h,
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m: m,
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}
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}
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// Render update the display with the data from the LED buffer
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func (c *Canvas) Render() error {
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return c.m.Render()
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}
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// ColorModel returns the canvas' color model, always color.RGBAModel
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func (c *Canvas) ColorModel() color.Model {
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return color.RGBAModel
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}
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// Bounds return the topology of the Canvas
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func (c *Canvas) Bounds() image.Rectangle {
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return image.Rect(0, 0, c.w, c.h)
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}
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// At returns the color of the pixel at (x, y)
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func (c *Canvas) At(x, y int) color.Color {
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return c.m.At(c.position(x, y))
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}
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// Set set LED at position x,y to the provided 24-bit color value
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func (c *Canvas) Set(x, y int, color color.Color) {
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c.m.Set(c.position(x, y), color)
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}
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func (c *Canvas) position(x, y int) int {
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return x + (y * c.w)
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}
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// Clear set all the leds on the matrix with color.Black
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func (c *Canvas) Clear() error {
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draw.Draw(c, c.Bounds(), &image.Uniform{color.Black}, image.ZP, draw.Src)
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return c.m.Render()
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}
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// Close clears the matrix and close the matrix
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func (c *Canvas) Close() error {
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c.Clear()
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return c.m.Close()
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}
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type Matrix interface {
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Geometry() (width, height int)
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At(position int) color.Color
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Set(position int, c color.Color)
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Apply([]color.Color) error
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Render() error
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Close() error
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}
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