mirror of
https://github.com/Crocmagnon/display-epaper.git
synced 2024-10-16 13:28:19 +02:00
72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
package main
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import (
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"github.com/Crocmagnon/display-epaper/epd"
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"github.com/llgcode/draw2d"
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"github.com/llgcode/draw2d/draw2dimg"
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"image"
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"image/color"
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)
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func getBlack() (*image.RGBA, error) {
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img := newWhite()
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gc := draw2dimg.NewGraphicContext(img)
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gc.SetFillColor(color.RGBA{0, 0, 0, 255})
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gc.SetStrokeColor(color.RGBA{0, 0, 0, 255})
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gc.SetLineWidth(2)
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text(gc, "Hello, world", 18, 110, 50)
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return img, nil
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}
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func getRed() (*image.RGBA, error) {
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img := newBlack()
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gc := draw2dimg.NewGraphicContext(img)
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gc.SetFillColor(color.RGBA{0, 0, 0, 255})
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gc.SetStrokeColor(color.RGBA{255, 255, 255, 255})
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gc.SetLineWidth(2)
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rect(gc, 10, 10, 50, 50)
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rect(gc, 60, 10, 100, 50)
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return img, nil
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}
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func text(gc *draw2dimg.GraphicContext, s string, size, x, y float64) {
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gc.SetFontData(draw2d.FontData{Name: fontName})
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gc.SetFontSize(size)
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gc.StrokeStringAt(s, x, y)
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}
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func newWhite() *image.RGBA {
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img := image.NewRGBA(image.Rect(0, 0, epd.Width, epd.Height))
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for y := 0; y < epd.Height; y++ {
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for x := 0; x < epd.Width; x++ {
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img.Set(x, y, color.White)
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}
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}
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return img
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}
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func newBlack() *image.RGBA {
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img := image.NewRGBA(image.Rect(0, 0, epd.Width, epd.Height))
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for y := 0; y < epd.Height; y++ {
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for x := 0; x < epd.Width; x++ {
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img.Set(x, y, color.Black)
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}
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}
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return img
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}
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func rect(gc *draw2dimg.GraphicContext, x1, y1, x2, y2 float64) {
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gc.BeginPath()
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gc.MoveTo(x1, y1)
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gc.LineTo(x2, y1)
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gc.LineTo(x2, y2)
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gc.LineTo(x1, y2)
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gc.Close()
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gc.FillStroke()
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}
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