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https://github.com/flynx/ImageGrid.git
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cleanup...
Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
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@ -39,15 +39,18 @@ var object = require('lib/object')
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var Filters =
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module.Filters = {
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makeCanvas: function(w, h, canvas){
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var c = canvas || document.createElement('canvas')
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var c = canvas
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|| document.createElement('canvas')
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c.width = w
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c.height = h
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return c },
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// as input takes an HTML Image object...
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getPixels: function(img, tmp_canvas, w, h){
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var w = w || img.naturalWidth
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var h = h || img.naturalHeight
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var w = w
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|| img.naturalWidth
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var h = h
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|| img.naturalHeight
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var c = this.makeCanvas(w, h, tmp_canvas)
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var context = c.getContext('2d')
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if(img == null){
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@ -58,8 +61,10 @@ module.Filters = {
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context.drawImage(img, 0, 0, w, h) }
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return context.getImageData(0, 0, c.width, c.height) },
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setPixels: function(c, data, w, h){
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w = c.width = w || data.width
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h = c.height = h || data.height
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w = c.width = w
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|| data.width
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h = c.height = h
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|| data.height
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var context = c.getContext('2d')
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context.putImageData(data, 0, 0) },
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@ -72,10 +77,13 @@ module.Filters = {
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// focusImage: 2
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// showMetadata
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getNormalizedPixels: function(img, tmp_canvas, s, rotate, flip){
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s = s || Math.max(img.naturalWidth, img.naturalHeight)
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rotate = rotate || 0
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s = s
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|| Math.max(img.naturalWidth, img.naturalHeight)
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rotate = rotate
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|| 0
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;(rotate == 90 || rotate == 270)
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;(rotate == 90
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|| rotate == 270)
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&& (flip = flip == 'horizontal' ?
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'vertical'
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: flip == 'vertical' ?
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@ -116,13 +124,17 @@ module.Filters = {
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var b = d[i+2]
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// CIE luminance for the RGB
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// The human eye is bad at seeing red and blue, so we de-emphasize them.
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var v = 0.2126*r + 0.7152*g + 0.0722*b
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var v = 0.2126*r
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+ 0.7152*g
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+ 0.0722*b
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d[i] = d[i+1] = d[i+2] = v }
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return pixels },
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// XXX need to resize this...
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histogram: function(pixels, mode, color){
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color = color || 'fill'
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mode = mode || 'luminance'
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color = color
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|| 'fill'
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mode = mode
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|| 'luminance'
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var size = 255
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var w = size
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@ -148,11 +160,14 @@ module.Filters = {
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count[v] = count[v+1] = count[v+2] = (count[v] || 0) + 1
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} else {
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if(mode == 'color' || mode == 'R'){
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if(mode == 'color'
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|| mode == 'R'){
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count[r*4] = (count[r*4] || 0) + 1 }
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if(mode == 'color' || mode == 'G'){
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if(mode == 'color'
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|| mode == 'G'){
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count[g*4+1] = (count[g*4+1] || 0) + 1 }
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if(mode == 'color' || mode == 'B'){
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if(mode == 'color'
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|| mode == 'B'){
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count[b*4+2] = (count[b*4+2] || 0) + 1 } } }
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var m = size / Math.max(...count.filter(function(){ return true }))
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@ -179,8 +194,10 @@ module.Filters = {
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return out },
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waveform: function(pixels, mode, color){
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mode = mode || 'luminance'
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color = color || 'normalized'
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mode = mode
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|| 'luminance'
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color = color
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|| 'normalized'
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var w = pixels.width
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var h = pixels.height
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@ -225,20 +242,17 @@ module.Filters = {
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var Bl = 0.0722
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for(var i=0; i<d.length; i+=4){
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var r = d[i]
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var g = d[i+1]
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var b = d[i+2]
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var c, j, f, x, y
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if(mode === 'luminance'){
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var v = Rl*r + Gl*g + Bl*b
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c = count[j = pos(i, v)] = (count[j] || 0) + 1
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od[j] = od[j+1] = od[j+2] = c * gain
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} else {
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if(mode === 'color' || mode === 'R'){
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f = Rl
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x = 1
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@ -246,7 +260,6 @@ module.Filters = {
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j = pos(i, r)
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c = count[j] = (count[j] || 0) + 1
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od[j] = c * gain }
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if(mode === 'color' || mode === 'G'){
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f = Gl
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x = -1
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@ -254,7 +267,6 @@ module.Filters = {
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j = pos(i, g) + 1
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c = count[j] = (count[j] || 0) + 1
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od[j] = c * gain }
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if(mode === 'color' || mode === 'B'){
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f = Bl
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x = -2
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@ -443,7 +455,8 @@ object.Constructor('igImageGraph', HTMLElement, {
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(img.src = value)
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: img.src) },
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get mode(){
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return this.getAttribute('mode') || 'color' },
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return this.getAttribute('mode')
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|| 'color' },
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set mode(value){
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this.modes.includes(value)
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&& this.setAttribute('mode', value)
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@ -452,7 +465,8 @@ object.Constructor('igImageGraph', HTMLElement, {
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this.update_controls()
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this.update() },
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get color(){
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return this.getAttribute('color') || 'normalized' },
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return this.getAttribute('color')
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|| 'normalized' },
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set color(value){
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this.color_modes.includes(value)
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&& this.setAttribute('color', value)
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@ -461,7 +475,8 @@ object.Constructor('igImageGraph', HTMLElement, {
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this.update() },
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get orientation(){
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return this.getAttribute('orientation') || 0 },
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return this.getAttribute('orientation')
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|| 0 },
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set orientation(value){
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;(['top', 'left', 'bottom', 'right'].includes(value)
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|| typeof(value) == typeof(123))
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@ -566,7 +581,10 @@ object.Constructor('igImageGraph', HTMLElement, {
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.map(function(m){
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var button = document.createElement('button')
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button.innerText = m
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button.classList.add(m, ...(m == mode ? ['current'] : []))
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button.classList.add(m,
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...(m == mode ?
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['current']
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: []))
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button.onclick = function(){
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that.mode = m }
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return button }),
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