add comments for grid.go (12bbfea7) · Commits · blackheaven / tinygraphs

app-backend/grid.go

+7 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,8 @@ import (
		"net/http"
		)

		// gridColorHandler is the handler for /grid/[0-8]
		// build a 6x6 grid with alternate colors based on the number passed in the url
		func gridColorHandler(w http.ResponseWriter, r *http.Request) {
		intID, err := PermalinkID(r, 2)
		if err != nil {
		@@ -20,6 +22,8 @@ func gridColorHandler(w http.ResponseWriter, r *http.Request) {
		}
		}

		// grid6X6Handler is the handler for /grid/
		// build a 6x6 grid with alternate black and white colors.
		func grid6X6Handler(w http.ResponseWriter, r *http.Request) {
		m := image.NewRGBA(image.Rect(0, 0, 240, 240))
		color1 := color.RGBA{uint8(255), uint8(255), 255, 255}
		@@ -29,6 +33,7 @@ func grid6X6Handler(w http.ResponseWriter, r *http.Request) {
		writeImage(w, &img)
		}

		// gradientHandler is the handler for /gradient/
		func gradientHandler(w http.ResponseWriter, r *http.Request) {
		m := image.NewRGBA(image.Rect(0, 0, 240, 240))
		drawGradient(m)
		@@ -36,6 +41,7 @@ func gradientHandler(w http.ResponseWriter, r *http.Request) {
		writeImage(w, &img)
		}

		//drawGrid6X6 builds an image with 6X6 quadrants of alternate colors.
		func drawGrid6X6(m *image.RGBA, color1, color2 color.RGBA) {
		size := m.Bounds().Size()
		quad := size.X / 6
		@@ -53,6 +59,7 @@ func drawGrid6X6(m *image.RGBA, color1, color2 color.RGBA) {
		}
		}

		// drawGradient builds an image with gradient colors.
		func drawGradient(m *image.RGBA) {
		size := m.Bounds().Size()
		for x := 0; x < size.X; x++ {