Remove "downscale only" mode

The normal scaling mode should be sufficient for most use cases, so
let's keep the interface simple.

app/ui.js

@@ -1240,7 +1240,7 @@ var UI = {
         if (!UI.rfb) return;
 
         var resizeMode = UI.getSetting('resize');
-        if (resizeMode !== 'scale' && resizeMode !== 'downscale') {
+        if (resizeMode !== 'scale') {
             return;
         }
 
@@ -1250,8 +1250,7 @@ var UI = {
             return;
         }
 
-        var downscaleOnly = resizeMode === 'downscale';
-        UI.rfb.autoscale(screen.w, screen.h, downscaleOnly);
+        UI.rfb.autoscale(screen.w, screen.h);
         UI.fixScrollbars();
     },
 
@@ -1294,7 +1293,7 @@ var UI = {
         var new_clip = UI.getSetting('view_clip');
 
         var resizeSetting = UI.getSetting('resize');
-        if (resizeSetting === 'downscale' || resizeSetting === 'scale') {
+        if (resizeSetting === 'scale') {
             // Disable viewport clipping if we are scaling
             new_clip = false;
         } else if (isTouchDevice) {
@@ -1324,7 +1323,7 @@ var UI = {
     enableDisableViewClip: function() {
         var resizeSetting = UI.getSetting('resize');
         // Disable clipping if we are scaling, connected or on touch
-        if (resizeSetting === 'downscale' || resizeSetting === 'scale' ||
+        if (resizeSetting === 'scale' ||
             isTouchDevice) {
             UI.disableSetting('view_clip');
         } else {

core/display.js

@@ -517,7 +517,7 @@ Display.prototype = {
         this._target.style.cursor = "none";
     },
 
-    autoscale: function (containerWidth, containerHeight, downscaleOnly) {
+    autoscale: function (containerWidth, containerHeight) {
         var vp = this._viewportLoc;
         var targetAspectRatio = containerWidth / containerHeight;
         var fbAspectRatio = vp.w / vp.h;
@@ -529,10 +529,6 @@ Display.prototype = {
             scaleRatio = containerHeight / vp.h;
         }
 
-        if (scaleRatio > 1.0 && downscaleOnly) {
-            scaleRatio = 1.0;
-        }
-
         this._rescale(scaleRatio);
     },
 

core/rfb.js

@@ -351,9 +351,9 @@ RFB.prototype = {
         RFB.messages.clientCutText(this._sock, text);
     },
 
-    autoscale: function (width, height, downscaleOnly) {
+    autoscale: function (width, height) {
         if (this._rfb_connection_state !== 'connected') { return; }
-        this._display.autoscale(width, height, downscaleOnly);
+        this._display.autoscale(width, height);
     },
 
     viewportChangeSize: function(width, height) {

docs/API-internal.md

@@ -117,7 +117,7 @@ None
 | changeCursor       | (pixels, mask, hotx, hoty, w, h)                        | Change cursor appearance
 | defaultCursor      | ()                                                      | Restore default cursor appearance
 | disableLocalCursor | ()                                                      | Disable local (client-side) cursor
-| autoscale          | (containerWidth, containerHeight, downscaleOnly)        | Scale the display
+| autoscale          | (containerWidth, containerHeight)                       | Scale the display
 
 ### 2.3.3 Callbacks
 

docs/API.md

@@ -410,7 +410,7 @@ The `RFB.autoscale()` method is used to automatically adjust
 
 ##### Syntax
 
-    RFB.autoscale( width, height, downscaleOnly );
+    RFB.autoscale( width, height );
 
 ###### Parameters
 
@@ -420,9 +420,6 @@ The `RFB.autoscale()` method is used to automatically adjust
 **`height`**
   - A `long` specifying the maximum height of the canvas in CSS pixels.
 
-**`downscaleOnly`**
-  - A `boolean` specifying if the scale must be kept below `1.0`.
-
 #### RFB.requestDesktopSize()
 
 The `RFB.requestDesktopSize()` method is used to request a change of

tests/test.display.js

@@ -272,20 +272,6 @@ describe('Display/Canvas Helper', function () {
             expect(canvas.width).to.equal(4);
             expect(canvas.height).to.equal(3);
         });
-
-        it('should not upscale when downscaleOnly is true', function () {
-            display.autoscale(2, 2, true);
-            expect(display.absX(9)).to.equal(18);
-            expect(display.absY(18)).to.equal(36);
-            expect(canvas.clientWidth).to.equal(2);
-            expect(canvas.clientHeight).to.equal(2);
-
-            display.autoscale(16, 9, true);
-            expect(display.absX(9)).to.equal(9);
-            expect(display.absY(18)).to.equal(18);
-            expect(canvas.clientWidth).to.equal(4);
-            expect(canvas.clientHeight).to.equal(3);
-        });
     });
 
     describe('drawing', function () {

vnc.html

@@ -213,7 +213,6 @@
                         <select id="noVNC_setting_resize" name="vncResize">
                             <option value="off">None</option>
                             <option value="scale">Local Scaling</option>
-                            <option value="downscale">Local Downscaling</option>
                             <option value="remote">Remote Resizing</option>
                         </select>
                     </li>