quick color draft (91514b28) · Commits · blackheaven / tinygraphs

app-backend/grid.go

+105 −8

Original line number	Diff line number	Diff line
		@@ -3,14 +3,116 @@ package main
		import (
		"image"
		"image/color"

		"strconv"
		"strings"
		// "image/draw"
		"log"
		"net/http"
		)

		// parse permalink id from URL and return it
		func PermalinkID(r *http.Request, level int64) (int64, error) {
		url := strings.Replace(r.URL.String(), "http://", "", 1)
		path := strings.Split(url, "/")
		// if url has params extract id until the ? character
		var strID string

		strID = path[level]
		intID, err := strconv.ParseInt(strID, 0, 64)
		if err != nil {
		// only try to extract id if were are unable to exracted using the level.
		if strings.Contains(r.URL.String(), "?") {
		strPath := path[level]
		strID = strPath[0:strings.Index(strPath, "?")]
		} else {
		strID = path[level]
		}
		intID, err = strconv.ParseInt(strID, 0, 64)
		if err != nil {
		log.Printf("error when calling PermalinkID with %v.Error: %v", path[level], err)
		}
		}
		return intID, err
		}

		func colorGridHandler(w http.ResponseWriter, r *http.Request) {
		intID, err := PermalinkID(r, 1)
		if err != nil {
		log.Printf("error when extracting permalink id: %v", err)
		} else {
		m := image.NewRGBA(image.Rect(0, 0, 240, 240))
		var c color.RGBA
		if intID == 1 {
		c = color.RGBA{
		uint8(0),
		uint8(144),
		167,
		255}
		}
		if intID == 2 {
		c = color.RGBA{
		uint8(232),
		uint8(70),
		134,
		255}
		}
		if intID == 3 {
		c = color.RGBA{
		uint8(255),
		uint8(237),
		81,
		255}
		}
		if intID == 4 {
		c = color.RGBA{
		uint8(177),
		uint8(192),
		24,
		255}
		}
		if intID == 5 {
		c = color.RGBA{
		uint8(208),
		uint8(2),
		120,
		255}
		}
		if intID == 6 {
		c = color.RGBA{
		uint8(0),
		uint8(44),
		47,
		255}
		}
		if intID == 7 {
		c = color.RGBA{
		uint8(29),
		uint8(24),
		18,
		255}
		}
		if intID == 8 {
		c = color.RGBA{
		uint8(33),
		uint8(30),
		26,
		255}
		}

		drawGrid6X6(m, c)
		var img image.Image = m
		writeImage(w, &img)
		}
		}

		func grid6X6Handler(w http.ResponseWriter, r *http.Request) {
		m := image.NewRGBA(image.Rect(0, 0, 240, 240))
		drawGrid6X6(m)
		color := color.RGBA{
		uint8(255),
		uint8(255),
		255,
		255}
		drawGrid6X6(m, color)
		var img image.Image = m
		writeImage(w, &img)
		}
		@@ -22,7 +124,7 @@ func gradientHandler(w http.ResponseWriter, r *http.Request) {
		writeImage(w, &img)
		}

		func drawGrid6X6(m *image.RGBA) {
		func drawGrid6X6(m *image.RGBA, color color.RGBA) {
		size := m.Bounds().Size()
		quad := size.X / 6
		for x := 0; x < size.X; x++ {
		@@ -30,11 +132,6 @@ func drawGrid6X6(m *image.RGBA) {
		for y := 0; y < size.Y; y++ {
		val2 := ((y / quad) % quad) % 2
		if val+val2 == 1 {
		color := color.RGBA{
		uint8(255),
		uint8(255),
		255,
		255}
		m.Set(x, y, color)
		}
		}

app-backend/main.go

+1 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ func main() {
		r.HandleFunc("/red/?", redHandler)
		r.HandleFunc("/grid/?", grid6X6Handler)
		r.HandleFunc("/gradient/?", gradientHandler)
		r.HandleFunc("/[1-8]/?", colorGridHandler)
		r.AddStaticResource(root)

		log.Println("Listening on " + os.Getenv("PORT"))