parent
5d5dc925b2
commit
26a4d1a6aa
27
main.go
27
main.go
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@ -4,6 +4,7 @@ import (
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"flag"
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"flag"
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"fmt"
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"fmt"
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"image"
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"image"
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"image/color"
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_ "image/gif"
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_ "image/gif"
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_ "image/jpeg"
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_ "image/jpeg"
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_ "image/png"
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_ "image/png"
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@ -13,7 +14,6 @@ import (
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_ "net/http/pprof"
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_ "net/http/pprof"
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"os"
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"os"
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"runtime/pprof"
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"runtime/pprof"
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"strconv"
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"time"
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"time"
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)
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)
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@ -100,30 +100,29 @@ func readImage(path string) (img image.Image) {
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return img
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return img
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}
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}
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func intToHex(x uint32) string {
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str := strconv.FormatInt(int64(x), 16)
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if len(str) == 1 {
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str = "0" + str
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}
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return str[0:2]
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}
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// Creates message based on given image
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// Creates message based on given image
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func genCommands(img image.Image, offset_x, offset_y int) (commands [][]byte) {
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func genCommands(img image.Image, offset_x, offset_y int) (commands [][]byte) {
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max_x := img.Bounds().Max.X
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max_x := img.Bounds().Max.X
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max_y := img.Bounds().Max.Y
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max_y := img.Bounds().Max.Y
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commands = make([][]byte, max_x*max_y)
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commands = make([][]byte, max_x*max_y)
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numCmds := 0
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for x := 0; x < max_x; x++ {
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for x := 0; x < max_x; x++ {
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for y := 0; y < max_y; y++ {
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for y := 0; y < max_y; y++ {
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r, g, b, _ := img.At(x, y).RGBA()
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// ensure we're working with RGBA colors (non-alpha-pre-multiplied)
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colStr := intToHex(r) + intToHex(g) + intToHex(b)
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c := color.NRGBAModel.Convert(img.At(x, y)).(color.NRGBA)
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cmd := fmt.Sprintf("PX %d %d %s\n", x+offset_x, y+offset_y, colStr)
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commands[x*max_y+y] = []byte(cmd)
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// ignore transparent pixels
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if c.A != 0 {
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cmd := fmt.Sprintf("PX %d %d %.2x%.2x%.2x\n",
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x+offset_x, y+offset_y, c.R, c.G, c.B)
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commands[numCmds] = []byte(cmd)
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numCmds += 1
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}
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}
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}
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}
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}
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return commands
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return commands[:numCmds]
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}
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}
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// Splits messages into equally sized chunks
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// Splits messages into equally sized chunks
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