46 lines
969 B
Go
46 lines
969 B
Go
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package gl
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import (
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"image"
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"image/color"
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"fyne.io/fyne/v2"
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)
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type captureImage struct {
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pix []uint8
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width, height int
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}
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func (c *captureImage) ColorModel() color.Model {
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return color.RGBAModel
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}
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func (c *captureImage) Bounds() image.Rectangle {
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return image.Rect(0, 0, c.width, c.height)
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}
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func (c *captureImage) At(x, y int) color.Color {
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start := ((c.height-y-1)*c.width + x) * 4
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return color.RGBA{R: c.pix[start], G: c.pix[start+1], B: c.pix[start+2], A: c.pix[start+3]}
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}
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func (p *painter) Capture(c fyne.Canvas) image.Image {
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pos := fyne.NewPos(c.Size().Width, c.Size().Height)
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width, height := c.PixelCoordinateForPosition(pos)
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pixels := make([]uint8, width*height*4)
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p.contextProvider.RunWithContext(func() {
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p.ctx.ReadBuffer(front)
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p.logError()
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p.ctx.ReadPixels(0, 0, width, height, colorFormatRGBA, unsignedByte, pixels)
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p.logError()
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})
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return &captureImage{
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pix: pixels,
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width: width,
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height: height,
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}
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}
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