Bitmap/PPM conversion through a pipe: Difference between revisions
Bitmap/PPM conversion through a pipe (view source)
Revision as of 01:22, 23 June 2011
, 12 years agoGo solution
({{omit from|PARI/GP}}) |
(Go solution) |
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In order to make it working, you must link it with the raster image functions given by the codes [[Bresenham's_line_algorithm#C|here]] and [[Basic_bitmap_storage#C|here]]
=={{header|Go}}==
{{works with|Go weekly.2011-06-16}}
Using cjpeg:
<lang go>package main
// Files required to build supporting package raster are found in:
// * Bitmap
// * Write a PPM file
import (
"raster"
"exec"
"fmt"
"rand"
)
func main() {
b := raster.NewBitmap(400, 300)
// a little extravagant, this draws a design of dots and lines
b.FillRgb(0xc08040)
for i := 0; i < 2000; i++ {
b.SetPxRgb(rand.Intn(400), rand.Intn(300), 0x804020)
}
for x := 0; x < 400; x++ {
for y := 240; y < 245; y++ {
b.SetPxRgb(x, y, 0x804020)
}
for y := 260; y < 265; y++ {
b.SetPxRgb(x, y, 0x804020)
}
}
for y := 0; y < 300; y++ {
for x := 80; x < 85; x++ {
b.SetPxRgb(x, y, 0x804020)
}
for x := 95; x < 100; x++ {
b.SetPxRgb(x, y, 0x804020)
}
}
// pipe logic
c := exec.Command("cjpeg", "-outfile", "pipeout.jpg")
pipe, err := c.StdinPipe()
if err != nil {
fmt.Println(err)
return
}
err = c.Start()
if err != nil {
fmt.Println(err)
return
}
err = b.WritePpmTo(pipe)
if err != nil {
fmt.Println(err)
return
}
err = pipe.Close()
if err != nil {
fmt.Println(err)
}
}</lang>
== {{Header|OCaml}} ==
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