Ejemplo n.º 1
0
// Resize only if picture from EmpLogo is more than 80 pix width
// If resize, save image to entity king ShortLogo and stream
// If no resize is necesary, save to entity ShortLogo and stream
func rslogo(w http.ResponseWriter, r *http.Request) {
	c := appengine.NewContext(r)
	if r.Method == "GET" {
		sf, _ := strconv.Atoi(r.FormValue("s"))
		force, _ := strconv.Atoi(r.FormValue("force"))
		// Check for shortlogo
		var simg model.Image
		simg.Kind = "ShortLogo"
		if r.FormValue("IdEmp") != "" {
			simg.IdEmp = r.FormValue("IdEmp")
		} else {
			w.WriteHeader(http.StatusNotFound)
			return
		}
		if force != 1 {
			shortlogo, _ := model.GetShortLogo(c, r.FormValue("IdEmp"))

			// Stream short logo if already exists
			if shortlogo != nil {
				w.Header().Set("Content-type", "image/jpeg")
				w.Write(shortlogo.Data)

				/*
					m, _, err := image.Decode(bytes.NewBuffer(shortlogo.Data))
					model.Check(err)
					w.Header().Set("Content-type", "image/jpeg")
					jpeg.Encode(w, m, nil)
				*/

				return
			}
		}

		// Process biglogo if shortlogo doesn't exists
		// Save and Stream new shortlogo
		biglogo := model.GetLogo(c, r.FormValue("IdEmp"))
		if biglogo == nil {
			// No such imageb
			w.WriteHeader(http.StatusNotFound)
			return
		}

		i, _, err := image.Decode(bytes.NewBuffer(biglogo.Data))
		if err != nil {
			// ERR_BADFORMAT
			w.WriteHeader(http.StatusNotFound)
			return
		}

		const max = 70
		if sf == 0 {
			// We aim for less than max pixels in any dimension.
			if b := i.Bounds(); b.Dx() > max || b.Dy() > max {
				// If it's gigantic, it's more efficient to downsample first
				// and then resize; resizing will smooth out the roughness.
				if b.Dx() > 2*max || b.Dy() > 2*max {
					w, h := max*2, max*2
					if b.Dx() > b.Dy() {
						h = b.Dy() * h / b.Dx()
					} else {
						w = b.Dx() * w / b.Dy()
					}
					i = resize.Resample(i, i.Bounds(), w, h)
					b = i.Bounds()
				}
				w, h := max, max
				if b.Dx() > b.Dy() {
					h = b.Dy() * h / b.Dx()
				} else {
					w = b.Dx() * w / b.Dy()
				}
				i = resize.Resize(i, i.Bounds(), w, h)
			} else {
				w, h := max, max
				if b.Dx() > b.Dy() {
					h = b.Dy() * h / b.Dx()
				} else {
					w = b.Dx() * w / b.Dy()
				}
				i = resize.Resize(i, i.Bounds(), w, h)
			}
		} else {
			// We aim for a resize by ratio.
			b := i.Bounds()
			h := b.Dy()
			w := b.Dx()
			if sf > 0 && sf <= 2 {
				h = h * sf
				w = w * sf
			} else if sf < 0 && sf > -1 {
				sf = (sf * 2) + sf
				h = h * (1 / sf)
				w = w * (1 / sf)
			}
			i = resize.Resize(i, i.Bounds(), w, h)
		}

		// Encode as a new JPEG image.
		var buf bytes.Buffer
		err = jpeg.Encode(&buf, i, nil)
		if err != nil {
			// ERR_FAIL_ENCODE
			w.WriteHeader(http.StatusNotFound)
			return
		}

		// Save the image under a unique key, a hash of the image.
		simg.IdImg = model.RandId(20)
		simg.Data = buf.Bytes()
		simg.Name = biglogo.Name
		simg.Desc = biglogo.Desc
		simg.Sizepx = max
		simg.Sizepy = 0
		simg.Url = biglogo.Url
		simg.Type = "jpeg"
		simg.Sp1 = biglogo.Sp1
		simg.Sp2 = biglogo.Sp2
		simg.Sp3 = biglogo.Sp3
		simg.Sp4 = biglogo.Sp4
		simg.Np1 = biglogo.Np1
		simg.Np2 = biglogo.Np2
		simg.Np3 = biglogo.Np3
		simg.Np4 = biglogo.Np4

		_, err = model.PutLogo(c, &simg)
		if err != nil {
			// ERR_DATASTORE
			// Don't return, stream image either way
		}
		w.Header().Set("Content-type", "image/jpeg")
		w.Write(simg.Data)
		/*
			m, _, err := image.Decode(bytes.NewBuffer(simg.Data))
			model.Check(err)
			w.Header().Set("Content-type", "image/jpeg")
			jpeg.Encode(w, m, nil)
		*/
	}
}
Ejemplo n.º 2
0
func slogores(c appengine.Context, id string, max int, sf int) int {
	var simg model.Image
	// Process biglogo if shortlogo doesn't exists
	// Save and Stream new shortlogo
	biglogo := model.GetLogo(c, id)
	if biglogo == nil {
		// No such imageb
		return -1
	}

	i, _, err := image.Decode(bytes.NewBuffer(biglogo.Data))
	if err != nil {
		// ERR_BADFORMAT
		return -1
	}

	if sf == 0 {
		// We aim for less than 80 pixels in any dimension.
		if b := i.Bounds(); b.Dx() > max || b.Dy() > max {
			// If it's gigantic, it's more efficient to downsample first
			// and then resize; resizing will smooth out the roughness.
			if b.Dx() > 2*max || b.Dy() > 2*max {
				w, h := max*2, max*2
				if b.Dx() > b.Dy() {
					h = b.Dy() * h / b.Dx()
				} else {
					w = b.Dx() * w / b.Dy()
				}
				i = resize.Resample(i, i.Bounds(), w, h)
				b = i.Bounds()
			}
			w, h := max, max
			if b.Dx() > b.Dy() {
				h = b.Dy() * h / b.Dx()
			} else {
				w = b.Dx() * w / b.Dy()
			}
			i = resize.Resize(i, i.Bounds(), w, h)
		} else {
			w, h := max, max
			if b.Dx() > b.Dy() {
				h = b.Dy() * h / b.Dx()
			} else {
				w = b.Dx() * w / b.Dy()
			}
			i = resize.Resize(i, i.Bounds(), w, h)
		}
	} else {
		// We aim for a resize by ratio.
		b := i.Bounds()
		h := b.Dy()
		w := b.Dx()
		if sf > 0 && sf <= 2 {
			h = h * sf
			w = w * sf
		} else if sf < 0 && sf > -1 {
			sf = (sf * 2) + sf
			h = h * (1 / sf)
			w = w * (1 / sf)
		}
		i = resize.Resize(i, i.Bounds(), w, h)
	}

	// Encode as a new JPEG image.
	var buf bytes.Buffer
	err = jpeg.Encode(&buf, i, nil)
	if err != nil {
		// ERR_FAIL_ENCODE
		return -1
	}

	// Save the image under a unique key, a hash of the image.
	shortlogo, _ := model.GetShortLogo(c, id)
	simg.Kind = "ShortLogo"
	if shortlogo != nil {
		simg.IdImg = shortlogo.IdImg
	} else {
		simg.IdImg = model.RandId(20)
	}
	simg.IdEmp = id
	simg.Data = buf.Bytes()
	simg.Name = biglogo.Name
	simg.Desc = biglogo.Desc
	simg.Sizepx = max
	simg.Sizepy = 0
	simg.Url = biglogo.Url
	simg.Type = "jpeg"
	simg.Sp1 = biglogo.Sp1
	simg.Sp2 = biglogo.Sp2
	simg.Sp3 = biglogo.Sp3
	simg.Sp4 = biglogo.Sp4
	simg.Np1 = biglogo.Np1
	simg.Np2 = biglogo.Np2
	simg.Np3 = biglogo.Np3
	simg.Np4 = biglogo.Np4

	_, err = model.PutLogo(c, &simg)
	if err != nil {
		return -1
	}
	return 0
}