Remove non-JavaScript render code

It wasn't used anyway so simplify things.

3 files changed, 129 insertions, 152 deletions

diff --git a/core/display.js b/core/display.js
index dbeee24..6b036ff 100644
--- a/core/display.js
+++ b/core/display.js
@@ -77,11 +77,6 @@ export default function Display(target, defaults) {
         throw new Error("Canvas does not support createImageData");
     }
 
-    if (this._prefer_js === null) {
-        Log.Info("Prefering javascript operations");
-        this._prefer_js = true;
-    }
-
     // Determine browser support for setting the cursor via data URI scheme
     if (this._cursor_uri || this._cursor_uri === null ||
             this._cursor_uri === undefined) {
@@ -381,56 +376,45 @@ Display.prototype = {
             this._tile = this._drawCtx.createImageData(width, height);
         }
 
-        if (this._prefer_js) {
-            var red = color[2];
-            var green = color[1];
-            var blue = color[0];
+        var red = color[2];
+        var green = color[1];
+        var blue = color[0];
 
-            var data = this._tile.data;
-            for (var i = 0; i < width * height * 4; i += 4) {
-                data[i] = red;
-                data[i + 1] = green;
-                data[i + 2] = blue;
-                data[i + 3] = 255;
-            }
-        } else {
-            this.fillRect(x, y, width, height, color, true);
+        var data = this._tile.data;
+        for (var i = 0; i < width * height * 4; i += 4) {
+            data[i] = red;
+            data[i + 1] = green;
+            data[i + 2] = blue;
+            data[i + 3] = 255;
         }
     },
 
     // update sub-rectangle of the current tile
     subTile: function (x, y, w, h, color) {
-        if (this._prefer_js) {
-            var red = color[2];
-            var green = color[1];
-            var blue = color[0];
-            var xend = x + w;
-            var yend = y + h;
-
-            var data = this._tile.data;
-            var width = this._tile.width;
-            for (var j = y; j < yend; j++) {
-                for (var i = x; i < xend; i++) {
-                    var p = (i + (j * width)) * 4;
-                    data[p] = red;
-                    data[p + 1] = green;
-                    data[p + 2] = blue;
-                    data[p + 3] = 255;
-                }
+        var red = color[2];
+        var green = color[1];
+        var blue = color[0];
+        var xend = x + w;
+        var yend = y + h;
+
+        var data = this._tile.data;
+        var width = this._tile.width;
+        for (var j = y; j < yend; j++) {
+            for (var i = x; i < xend; i++) {
+                var p = (i + (j * width)) * 4;
+                data[p] = red;
+                data[p + 1] = green;
+                data[p + 2] = blue;
+                data[p + 3] = 255;
             }
-        } else {
-            this.fillRect(this._tile_x + x, this._tile_y + y, w, h, color, true);
         }
     },
 
     // draw the current tile to the screen
     finishTile: function () {
-        if (this._prefer_js) {
-            this._drawCtx.putImageData(this._tile, this._tile_x, this._tile_y);
-            this._damage(this._tile_x, this._tile_y,
-                         this._tile.width, this._tile.height);
-        }
-        // else: No-op -- already done by setSubTile
+        this._drawCtx.putImageData(this._tile, this._tile_x, this._tile_y);
+        this._damage(this._tile_x, this._tile_y,
+                     this._tile.width, this._tile.height);
     },
 
     blitImage: function (x, y, width, height, arr, offset, from_queue) {
@@ -697,7 +681,6 @@ make_properties(Display, [
     ['width', 'ro', 'int'],        // Display area width
     ['height', 'ro', 'int'],       // Display area height
 
-    ['prefer_js', 'rw', 'str'],    // Prefer Javascript over canvas methods
     ['cursor_uri', 'rw', 'raw'],   // Can we render cursor using data URI
 
     ['onFlush', 'rw', 'func'],     // onFlush(): A flush request has finished
diff --git a/docs/API-internal.md b/docs/API-internal.md
index a5324be..e33f806 100644
--- a/docs/API-internal.md
+++ b/docs/API-internal.md
@@ -97,7 +97,6 @@ None
 | viewport    | bool  | RW   | false   | Use viewport clipping
 | width       | int   | RO   |         | Display area width
 | height      | int   | RO   |         | Display area height
-| prefer_js   | str   | RW   |         | Prefer JavaScript over canvas methods
 | cursor_uri  | raw   | RW   |         | Can we render cursor using data URI
 
 ### 2.3.2 Methods
diff --git a/tests/test.display.js b/tests/test.display.js
index 7706587..3a8c13d 100644
--- a/tests/test.display.js
+++ b/tests/test.display.js
@@ -40,19 +40,19 @@ describe('Display/Canvas Helper', function () {
     describe('checking for cursor uri support', function () {
         it('should disable cursor URIs if there is no support', function () {
             _forceCursorURIs(false);
-            var display = new Display(document.createElement('canvas'), { prefer_js: true, viewport: false });
+            var display = new Display(document.createElement('canvas'), { viewport: false });
             expect(display._cursor_uri).to.be.false;
         });
 
         it('should enable cursor URIs if there is support', function () {
             _forceCursorURIs(true);
-            var display = new Display(document.createElement('canvas'), { prefer_js: true, viewport: false });
+            var display = new Display(document.createElement('canvas'), { viewport: false });
             expect(display._cursor_uri).to.be.true;
         });
 
         it('respect the cursor_uri option if there is support', function () {
             _forceCursorURIs(false);
-            var display = new Display(document.createElement('canvas'), { prefer_js: true, viewport: false, cursor_uri: false });
+            var display = new Display(document.createElement('canvas'), { viewport: false, cursor_uri: false });
             expect(display._cursor_uri).to.be.false;
         });
     });
@@ -60,7 +60,7 @@ describe('Display/Canvas Helper', function () {
     describe('viewport handling', function () {
         var display;
         beforeEach(function () {
-            display = new Display(document.createElement('canvas'), { prefer_js: false, viewport: true });
+            display = new Display(document.createElement('canvas'), { viewport: true });
             display.resize(5, 5);
             display.viewportChangeSize(3, 3);
             display.viewportChangePos(1, 1);
@@ -153,7 +153,7 @@ describe('Display/Canvas Helper', function () {
     describe('resizing', function () {
         var display;
         beforeEach(function () {
-            display = new Display(document.createElement('canvas'), { prefer_js: false, viewport: false });
+            display = new Display(document.createElement('canvas'), { viewport: false });
             display.resize(4, 4);
         });
 
@@ -215,7 +215,7 @@ describe('Display/Canvas Helper', function () {
 
         beforeEach(function () {
             canvas = document.createElement('canvas');
-            display = new Display(canvas, { prefer_js: false, viewport: true });
+            display = new Display(canvas, { viewport: true });
             display.resize(4, 4);
             display.viewportChangeSize(3, 3);
             display.viewportChangePos(1, 1);
@@ -255,7 +255,7 @@ describe('Display/Canvas Helper', function () {
 
         beforeEach(function () {
             canvas = document.createElement('canvas');
-            display = new Display(canvas, { prefer_js: false, viewport: true });
+            display = new Display(canvas, { viewport: true });
             display.resize(4, 3);
             document.body.appendChild(canvas);
         });
@@ -311,124 +311,119 @@ describe('Display/Canvas Helper', function () {
 
         // TODO(directxman12): improve the tests for each of the drawing functions to cover more than just the
         //                     basic cases
-        function drawing_tests (pref_js) {
-            var display;
-            beforeEach(function () {
-                display = new Display(document.createElement('canvas'), { prefer_js: pref_js });
-                display.resize(4, 4);
-            });
-
-            it('should clear the screen on #clear without a logo set', function () {
-                display.fillRect(0, 0, 4, 4, [0x00, 0x00, 0xff]);
-                display._logo = null;
-                display.clear();
-                display.resize(4, 4);
-                var empty = [];
-                for (var i = 0; i < 4 * display._fb_width * display._fb_height; i++) { empty[i] = 0; }
-                expect(display).to.have.displayed(new Uint8Array(empty));
-            });
-
-            it('should draw the logo on #clear with a logo set', function (done) {
-                display._logo = { width: 4, height: 4, type: "image/png", data: make_image_png(checked_data) };
-                display.clear();
-                display.set_onFlush(function () {
-                    expect(display).to.have.displayed(checked_data);
-                    expect(display._fb_width).to.equal(4);
-                    expect(display._fb_height).to.equal(4);
-                    done();
-                });
-                display.flush();
-            });
+        var display;
+        beforeEach(function () {
+            display = new Display(document.createElement('canvas'));
+            display.resize(4, 4);
+        });
 
-            it('should not draw directly on the target canvas', function () {
-                display.fillRect(0, 0, 4, 4, [0, 0, 0xff]);
-                display.flip();
-                display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
-                var expected = [];
-                for (var i = 0; i < 4 * display._fb_width * display._fb_height; i += 4) {
-                    expected[i] = 0xff;
-                    expected[i+1] = expected[i+2] = 0;
-                    expected[i+3] = 0xff;
-                }
-                expect(display).to.have.displayed(new Uint8Array(expected));
-            });
+        it('should clear the screen on #clear without a logo set', function () {
+            display.fillRect(0, 0, 4, 4, [0x00, 0x00, 0xff]);
+            display._logo = null;
+            display.clear();
+            display.resize(4, 4);
+            var empty = [];
+            for (var i = 0; i < 4 * display._fb_width * display._fb_height; i++) { empty[i] = 0; }
+            expect(display).to.have.displayed(new Uint8Array(empty));
+        });
 
-            it('should support filling a rectangle with particular color via #fillRect', function () {
-                display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
-                display.fillRect(0, 0, 2, 2, [0xff, 0, 0]);
-                display.fillRect(2, 2, 2, 2, [0xff, 0, 0]);
-                display.flip();
+        it('should draw the logo on #clear with a logo set', function (done) {
+            display._logo = { width: 4, height: 4, type: "image/png", data: make_image_png(checked_data) };
+            display.clear();
+            display.set_onFlush(function () {
                 expect(display).to.have.displayed(checked_data);
+                expect(display._fb_width).to.equal(4);
+                expect(display._fb_height).to.equal(4);
+                done();
             });
+            display.flush();
+        });
 
-            it('should support copying an portion of the canvas via #copyImage', function () {
-                display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
-                display.fillRect(0, 0, 2, 2, [0xff, 0, 0x00]);
-                display.copyImage(0, 0, 2, 2, 2, 2);
-                display.flip();
-                expect(display).to.have.displayed(checked_data);
-            });
+        it('should not draw directly on the target canvas', function () {
+            display.fillRect(0, 0, 4, 4, [0, 0, 0xff]);
+            display.flip();
+            display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
+            var expected = [];
+            for (var i = 0; i < 4 * display._fb_width * display._fb_height; i += 4) {
+                expected[i] = 0xff;
+                expected[i+1] = expected[i+2] = 0;
+                expected[i+3] = 0xff;
+            }
+            expect(display).to.have.displayed(new Uint8Array(expected));
+        });
 
-            it('should support drawing images via #imageRect', function (done) {
-                display.imageRect(0, 0, "image/png", make_image_png(checked_data));
-                display.flip();
-                display.set_onFlush(function () {
-                    expect(display).to.have.displayed(checked_data);
-                    done();
-                });
-                display.flush();
-            });
+        it('should support filling a rectangle with particular color via #fillRect', function () {
+            display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
+            display.fillRect(0, 0, 2, 2, [0xff, 0, 0]);
+            display.fillRect(2, 2, 2, 2, [0xff, 0, 0]);
+            display.flip();
+            expect(display).to.have.displayed(checked_data);
+        });
 
-            it('should support drawing tile data with a background color and sub tiles', function () {
-                display.startTile(0, 0, 4, 4, [0, 0xff, 0]);
-                display.subTile(0, 0, 2, 2, [0xff, 0, 0]);
-                display.subTile(2, 2, 2, 2, [0xff, 0, 0]);
-                display.finishTile();
-                display.flip();
-                expect(display).to.have.displayed(checked_data);
-            });
+        it('should support copying an portion of the canvas via #copyImage', function () {
+            display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
+            display.fillRect(0, 0, 2, 2, [0xff, 0, 0x00]);
+            display.copyImage(0, 0, 2, 2, 2, 2);
+            display.flip();
+            expect(display).to.have.displayed(checked_data);
+        });
 
-            it('should support drawing BGRX blit images with true color via #blitImage', function () {
-                var data = [];
-                for (var i = 0; i < 16; i++) {
-                    data[i * 4] = checked_data[i * 4 + 2];
-                    data[i * 4 + 1] = checked_data[i * 4 + 1];
-                    data[i * 4 + 2] = checked_data[i * 4];
-                    data[i * 4 + 3] = checked_data[i * 4 + 3];
-                }
-                display.blitImage(0, 0, 4, 4, data, 0);
-                display.flip();
+        it('should support drawing images via #imageRect', function (done) {
+            display.imageRect(0, 0, "image/png", make_image_png(checked_data));
+            display.flip();
+            display.set_onFlush(function () {
                 expect(display).to.have.displayed(checked_data);
+                done();
             });
+            display.flush();
+        });
 
-            it('should support drawing RGB blit images with true color via #blitRgbImage', function () {
-                var data = [];
-                for (var i = 0; i < 16; i++) {
-                    data[i * 3] = checked_data[i * 4];
-                    data[i * 3 + 1] = checked_data[i * 4 + 1];
-                    data[i * 3 + 2] = checked_data[i * 4 + 2];
-                }
-                display.blitRgbImage(0, 0, 4, 4, data, 0);
-                display.flip();
-                expect(display).to.have.displayed(checked_data);
-            });
+        it('should support drawing tile data with a background color and sub tiles', function () {
+            display.startTile(0, 0, 4, 4, [0, 0xff, 0]);
+            display.subTile(0, 0, 2, 2, [0xff, 0, 0]);
+            display.subTile(2, 2, 2, 2, [0xff, 0, 0]);
+            display.finishTile();
+            display.flip();
+            expect(display).to.have.displayed(checked_data);
+        });
 
-            it('should support drawing an image object via #drawImage', function () {
-                var img = make_image_canvas(checked_data);
-                display.drawImage(img, 0, 0);
-                display.flip();
-                expect(display).to.have.displayed(checked_data);
-            });
-        }
+        it('should support drawing BGRX blit images with true color via #blitImage', function () {
+            var data = [];
+            for (var i = 0; i < 16; i++) {
+                data[i * 4] = checked_data[i * 4 + 2];
+                data[i * 4 + 1] = checked_data[i * 4 + 1];
+                data[i * 4 + 2] = checked_data[i * 4];
+                data[i * 4 + 3] = checked_data[i * 4 + 3];
+            }
+            display.blitImage(0, 0, 4, 4, data, 0);
+            display.flip();
+            expect(display).to.have.displayed(checked_data);
+        });
 
-        describe('(prefering native methods)', function () { drawing_tests.call(this, false); });
-        describe('(prefering JavaScript)', function () { drawing_tests.call(this, true); });
+        it('should support drawing RGB blit images with true color via #blitRgbImage', function () {
+            var data = [];
+            for (var i = 0; i < 16; i++) {
+                data[i * 3] = checked_data[i * 4];
+                data[i * 3 + 1] = checked_data[i * 4 + 1];
+                data[i * 3 + 2] = checked_data[i * 4 + 2];
+            }
+            display.blitRgbImage(0, 0, 4, 4, data, 0);
+            display.flip();
+            expect(display).to.have.displayed(checked_data);
+        });
+
+        it('should support drawing an image object via #drawImage', function () {
+            var img = make_image_canvas(checked_data);
+            display.drawImage(img, 0, 0);
+            display.flip();
+            expect(display).to.have.displayed(checked_data);
+        });
     });
 
     describe('the render queue processor', function () {
         var display;
         beforeEach(function () {
-            display = new Display(document.createElement('canvas'), { prefer_js: false });
+            display = new Display(document.createElement('canvas'));
             display.resize(4, 4);
             sinon.spy(display, '_scan_renderQ');
         });