58 lines
1.1 KiB
Go
58 lines
1.1 KiB
Go
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package pixelflut
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import (
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"bufio"
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"encoding/hex"
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"fmt"
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"image"
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"image/color"
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"log"
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"net"
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"net/textproto"
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"strings"
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)
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func FetchImage(img *image.NRGBA, address string) {
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// FIXME @speed: this is unusably s l o w w w
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// bottleneck seems to be our pixel reading/parsing code. cpuprofile!
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// -> should buffer it just as in bomb()
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conn, err := net.Dial("tcp", address)
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if err != nil {
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log.Fatal(err)
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}
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defer conn.Close()
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reader := bufio.NewReader(conn)
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tp := textproto.NewReader(reader)
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b := img.Bounds()
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for {
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for x := b.Min.X; x < b.Max.X; x++ {
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for y := b.Min.Y; y < b.Max.Y; y++ {
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// request pixel
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fmt.Fprintf(conn, "PX %d %d\n", x, y)
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if err != nil {
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log.Fatal(err)
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}
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// read pixel
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// @speed try to run this in a separate goroutine?
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// we probably need to buffer the responses then
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res, err := tp.ReadLine()
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if err != nil {
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log.Fatal(err)
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}
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res2 := strings.Split(res, " ")
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col, _ := hex.DecodeString(res2[3])
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img.Set(x, y, color.NRGBA{
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uint8(col[0]),
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uint8(col[1]),
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uint8(col[2]),
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255,
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})
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}
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}
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}
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}
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