Add background color picker

src/editor.ts

@@ -539,48 +539,50 @@ const registerEditorEvents = (events: Events, editHistory: EditHistory, scene: S
     let compressor: PngCompressor;
 
     events.function('scene.saveScreenshot', async () => {
-        const texture = scene.camera.entity.camera.renderTarget.colorBuffer;
-        await texture.downloadAsync();
-
-        // construct the png compressor
-        if (!compressor) {
-            compressor = new PngCompressor();
-        }            
-
-        // @ts-ignore
-        const pixels = new Uint8ClampedArray(texture.getSource().buffer.slice());
-
-        // the render buffer contains premultiplied alpha. so apply background color.
-        const bkClr = 102;
-        for (let i = 0; i < pixels.length; i += 4) {
-            const r = pixels[i];
-            const g = pixels[i + 1];
-            const b = pixels[i + 2];
-            const a = pixels[i + 3];
-
-            pixels[i + 0] = r + (255 - a) * bkClr / 255;
-            pixels[i + 1] = g + (255 - a) * bkClr / 255;
-            pixels[i + 2] = b + (255 - a) * bkClr / 255;
-            pixels[i + 3] = 255;
-        }
+        events.fire('startSpinner');
+
+        try {
+            const texture = scene.camera.entity.camera.renderTarget.colorBuffer;
+            await texture.downloadAsync();
+
+            // construct the png compressor
+            if (!compressor) {
+                compressor = new PngCompressor();
+            }
 
-        const arrayBuffer = await compressor.compress(
-            new Uint32Array(pixels.buffer),
-            texture.width,
-            texture.height
-        );
-
-        // construct filename
-        const filename = replaceExtension(selectedSplats()?.[0]?.filename ?? 'SuperSplat', '.png');
-
-        // download
-        const blob = new Blob([arrayBuffer], { type: 'octet/stream' });
-        const url = window.URL.createObjectURL(blob);
-        const el = document.createElement('a');
-        el.download = filename;
-        el.href = url;
-        el.click();
-        window.URL.revokeObjectURL(url);
+            // @ts-ignore
+            const pixels = new Uint8ClampedArray(texture.getSource().buffer.slice());
+
+            // the render buffer contains premultiplied alpha. so apply background color.
+            const { r, g, b } = events.invoke('bgClr');
+            for (let i = 0; i < pixels.length; i += 4) {
+                const a = 255 - pixels[i + 3];
+                pixels[i + 0] += r * a;
+                pixels[i + 1] += g * a;
+                pixels[i + 2] += b * a;
+                pixels[i + 3] = 255;
+            }
+
+            const arrayBuffer = await compressor.compress(
+                new Uint32Array(pixels.buffer),
+                texture.width,
+                texture.height
+            );
+
+            // construct filename
+            const filename = replaceExtension(selectedSplats()?.[0]?.filename ?? 'SuperSplat', '.png');
+
+            // download
+            const blob = new Blob([arrayBuffer], { type: 'octet/stream' });
+            const url = window.URL.createObjectURL(blob);
+            const el = document.createElement('a');
+            el.download = filename;
+            el.href = url;
+            el.click();
+            window.URL.revokeObjectURL(url);
+        } finally {
+            events.fire('stopSpinner');
+        }
     });
 }
 

src/main.ts

@@ -136,10 +136,35 @@ const main = async () => {
         graphicsDevice
     );
 
-    // configure body background color
-    const clr = sceneConfig.bgClr;
-    const cnv = (v: number) => `${Math.max(0, Math.min(255, (v * 255))).toFixed(0)}`
-    document.body.style.backgroundColor = `rgba(${cnv(clr.r)},${cnv(clr.g)},${cnv(clr.b)},${clr.a.toFixed(2)})`;
+    // background color
+    const clr = {
+        r: sceneConfig.bgClr.r,
+        g: sceneConfig.bgClr.g,
+        b: sceneConfig.bgClr.b
+    };
+
+    const setBgClr = (r: number, g: number, b: number) => {
+        if (r !== clr.r || g !== clr.g || b !== clr.b) {
+            clr.r = r;
+            clr.g = g;
+            clr.b = b;
+
+            const cnv = (v: number) => `${Math.max(0, Math.min(255, (v * 255))).toFixed(0)}`
+            document.body.style.backgroundColor = `rgba(${cnv(r)},${cnv(g)},${cnv(b)},1)`;
+
+            events.fire('bgClr', r, g, b);
+        }
+    };
+
+    events.on('setBgClr', (r: number, g: number, b: number) => {
+        setBgClr(r, g, b);
+    });
+
+    events.function('bgClr', () => {
+        return { r: clr.r, g: clr.g, b: clr.b };
+    });
+
+    setBgClr(sceneConfig.bgClr.r, sceneConfig.bgClr.g, sceneConfig.bgClr.b);
 
     // tool manager
     const toolManager = new ToolManager(events);

src/ui/view-panel.scss

@@ -3,11 +3,11 @@
     transform: translate(0, -50%);
     right: 102px;
     width: 320px;
+    flex-direction: column;
 
-    :not(.pcui-hidden) {
+    &:not(.pcui-hidden) {
         display: flex;
     }
-    flex-direction: column;
 
     & > .view-panel-row {
         display: flex;

src/ui/view-panel.ts

@@ -1,5 +1,5 @@
 import { Vec3 } from 'playcanvas';
-import { BooleanInput, Container, Label, SliderInput } from 'pcui';
+import { BooleanInput, ColorPicker, Container, Label, SliderInput } from 'pcui';
 import { Events } from '../events';
 import { Tooltips } from './tooltips';
 import { localize } from './localization';
@@ -39,6 +39,25 @@ class ViewPanel extends Container {
         header.append(icon);
         header.append(label);
 
+        // background color
+
+        const bgClrRow = new Container({
+            class: 'view-panel-row'
+        });
+
+        const bgClrLabel = new Label({
+            text: localize('options.bg-clr'),
+            class: 'view-panel-row-label'
+        });
+
+        const bgClrPicker = new ColorPicker({
+            class: 'view-panel-row-picker',
+            value: [0.4, 0.4, 0.4]
+        });
+
+        bgClrRow.append(bgClrLabel);
+        bgClrRow.append(bgClrPicker);
+
         // camera fov
 
         const fovRow = new Container({
@@ -226,6 +245,7 @@ class ViewPanel extends Container {
         poseListContainer.append(poseList);
 
         this.append(header);
+        this.append(bgClrRow);
         this.append(fovRow);
         this.append(shBandsRow);
         this.append(centersSizeRow);
@@ -446,6 +466,12 @@ class ViewPanel extends Container {
             }
         });
 
+        // background color
+
+        bgClrPicker.on('change', (value: number[]) => {
+            events.fire('setBgClr', value[0], value[1], value[2]);
+        });
+
         // camera fov
 
         events.on('camera.fov', (fov: number) => {