func CaptureToPng(filename string) error {
// Based on a version from https://github.com/go-gl/glh.
// Copyright (c) 2012 The go-gl Authors. All rights reserved.
w, h := glh.GetViewportWH()
im := image.NewNRGBA(image.Rect(0, 0, w, h))
gl.ReadBuffer(gl.BACK_LEFT)
gl.ReadPixels(0, 0, w, h, gl.RGBA, gl.UNSIGNED_BYTE, im.Pix)
// Flip the image vertically.
//
// From IRC:
// <ClaudiusMaximus> nictuku: glReadPixels uses (0,0) at bottom left always
// - some (most?) image formats use (0,0) as top left
im = imaging.FlipV(im)
fd, err := os.Create(filename)
if err != nil {
return err
}
defer fd.Close()
png.Encode(fd, im)
return nil
}
func Capture() {
// TODO: co-ordinates, filename, cleverness to stitch many together
im := image.NewNRGBA(image.Rect(0, 0, 400, 400))
gl.ReadBuffer(gl.BACK_LEFT)
gl.ReadPixels(0, 0, 400, 400, gl.RGBA, gl.UNSIGNED_BYTE, im.Pix)
fd, err := os.Create("test.png")
if err != nil {
log.Panic("Err: ", err)
}
defer fd.Close()
png.Encode(fd, im)
}
func CaptureToPng(filename string) {
w, h := GetViewportWH()
im := image.NewNRGBA(image.Rect(0, 0, w, h))
gl.ReadBuffer(gl.BACK_LEFT)
gl.ReadPixels(0, 0, w, h, gl.RGBA, gl.UNSIGNED_BYTE, im.Pix)
fd, err := os.Create(filename)
if err != nil {
log.Panic("Err: ", err)
}
defer fd.Close()
png.Encode(fd, im)
}
func CaptureRGBA(im *image.RGBA) {
b := im.Bounds()
gl.ReadBuffer(gl.BACK_LEFT)
gl.ReadPixels(0, 0, b.Dx(), b.Dy(), gl.RGBA, gl.UNSIGNED_BYTE, im.Pix)
}