Resize patterns

Optimize dark patterns

src/components/chat/chat.ts

@@ -85,6 +85,7 @@ export default class Chat extends EventListenerBase<{
   public patternCanvas: HTMLCanvasElement;
   public backgroundTempId: number;
   public setBackgroundPromise: Promise<void>;
+  // public renderDarkPattern: () => Promise<void>;
   
   constructor(
     public appImManager: AppImManager, 
@@ -159,6 +160,7 @@ export default class Chat extends EventListenerBase<{
       this.patternRenderer = 
       this.gradientCanvas = 
       this.patternCanvas = 
+      // this.renderDarkPattern = 
       undefined;
 
     const intensity = theme.background.intensity && theme.background.intensity / 100;
@@ -179,11 +181,28 @@ export default class Chat extends EventListenerBase<{
           patternRenderer = this.patternRenderer = ChatBackgroundPatternRenderer.getInstance({
             url,
             width: rect.width,
-            height: rect.height
+            height: rect.height,
+            mask: isDarkPattern
           });
 
           patternCanvas = this.patternCanvas = patternRenderer.createCanvas();
           patternCanvas.classList.add('chat-background-item-canvas', 'chat-background-item-pattern-canvas');
+
+          if(isDarkPattern) {
+            item.classList.add('is-dark');
+          }
+
+          // if(isDarkPattern) {
+          //   this.renderDarkPattern = () => {
+          //     return patternRenderer.exportCanvasPatternToImage(patternCanvas).then(url => {
+          //       if(this.backgroundTempId !== tempId) {
+          //         return;
+          //       }
+                
+          //       gradientCanvas.style.webkitMaskImage = `url(${url})`;
+          //     });
+          //   };
+          // }
         } else if(theme.background.slug) {
           item.classList.add('is-image');
         }
@@ -236,7 +255,11 @@ export default class Chat extends EventListenerBase<{
           return;
         }
 
-        const append = [gradientCanvas, isDarkPattern ? undefined : patternCanvas].filter(Boolean);
+        const append = [
+          gradientCanvas, 
+          // isDarkPattern && this.renderDarkPattern ? undefined : patternCanvas
+          patternCanvas
+        ].filter(Boolean);
         if(append.length) {
           item.append(...append);
         }
@@ -261,18 +284,16 @@ export default class Chat extends EventListenerBase<{
       if(patternRenderer) {
         const renderPatternPromise = patternRenderer.renderToCanvas(patternCanvas);
         renderPatternPromise.then(() => {
-          let promise: Promise<any>;
-          if(isDarkPattern) {
-            promise = patternRenderer.exportCanvasPatternToImage(patternCanvas).then(url => {
           if(this.backgroundTempId !== tempId) {
             return;
           }
 
-              gradientCanvas.style.webkitMaskImage = `url(${url})`;
+          let promise: Promise<any>;
-            });
+          // if(isDarkPattern && this.renderDarkPattern) {
-          } else {
+          //   promise = this.renderDarkPattern();
+          // } else {
             promise = Promise.resolve();
-          }
+          // }
           
           promise.then(cb);
         });

src/components/chat/patternRenderer.ts

@@ -4,7 +4,6 @@
  * https://github.com/morethanwords/tweb/blob/master/LICENSE
  */
 
-import { IS_SAFARI } from "../../environment/userAgent";
 import { indexOfAndSplice } from "../../helpers/array";
 import { renderImageFromUrlPromise } from "../../helpers/dom/renderImageFromUrl";
 import { deepEqual } from "../../helpers/object";
@@ -12,19 +11,21 @@ import { deepEqual } from "../../helpers/object";
 type ChatBackgroundPatternRendererInitOptions = {
   url: string,
   width: number,
-  height: number
+  height: number,
+  mask?: boolean
 };
 
 export default class ChatBackgroundPatternRenderer {
   private static INSTANCES: ChatBackgroundPatternRenderer[] = [];
 
-  private pattern: CanvasPattern;
+  // private pattern: CanvasPattern;
   private objectUrl: string;
   private options: ChatBackgroundPatternRendererInitOptions;
   private canvases: Set<HTMLCanvasElement>;
-  private createCanvasPatternPromise: Promise<void>;
+  // private createCanvasPatternPromise: Promise<CanvasPattern>;
-  private exportCanvasPatternToImagePromise: Promise<string>;
+  // private exportCanvasPatternToImagePromise: Promise<string>;
-  // private img: HTMLImageElement;
+  private renderImageFromUrlPromise: Promise<HTMLImageElement>;
+  private img: HTMLImageElement;
 
   constructor() {
     this.canvases = new Set();
@@ -45,21 +46,38 @@ export default class ChatBackgroundPatternRenderer {
   }
 
   public init(options: ChatBackgroundPatternRendererInitOptions) {
+    // if(this.options) {
+    //   if(this.options.width !== options.width || this.options.height !== options.height) {
+    //     this.createCanvasPatternPromise = 
+    //       this.pattern = 
+    //       this.exportCanvasPatternToImagePromise = 
+    //       undefined;
+    //   }
+    // }
+
     this.options = options;
   }
 
   public renderToCanvas(canvas: HTMLCanvasElement) {
-    return this.createCanvasPattern(canvas).then(() => {
+    // return this.createCanvasPattern(canvas).then(() => {
+      // return this.fillCanvas(canvas);
+    // });
+
+    return this.renderImageFromUrl(this.options.url).then(() => {
       return this.fillCanvas(canvas);
     });
   }
 
-  private createCanvasPattern(canvas: HTMLCanvasElement) {
+  private renderImageFromUrl(url: string) {
-    if(this.createCanvasPatternPromise) return this.createCanvasPatternPromise;
+    if(this.renderImageFromUrlPromise) return this.renderImageFromUrlPromise;
-    return this.createCanvasPatternPromise = new Promise((resolve) => {
+    const img = this.img = document.createElement('img');
-      const img = document.createElement('img');
     img.crossOrigin = 'anonymous';
-      renderImageFromUrlPromise(img, this.options.url, false).then(() => {
+    return this.renderImageFromUrlPromise = renderImageFromUrlPromise(img, url, false).then(() => img);
+  }
+
+  /* private createCanvasPattern(canvas: HTMLCanvasElement) {
+    if(this.createCanvasPatternPromise) return this.createCanvasPatternPromise;
+    return this.createCanvasPatternPromise = this.renderImageFromUrl(this.options.url).then((img) => {
       let createPatternFrom: HTMLImageElement | HTMLCanvasElement;
       if(IS_SAFARI) {
         const canvas = createPatternFrom = document.createElement('canvas');
@@ -71,10 +89,11 @@ export default class ChatBackgroundPatternRenderer {
         createPatternFrom = img;
       }
       
-        // this.img = img;
+      const perf = performance.now();
       this.pattern = canvas.getContext('2d').createPattern(createPatternFrom, 'repeat-x');
-        resolve();
+      console.warn('creating pattern time:', performance.now() - perf);
-      });
+
+      return this.pattern;
     });
   }
 
@@ -86,7 +105,7 @@ export default class ChatBackgroundPatternRenderer {
         resolve(newUrl);
       }, 'image/png');
     });
-  }
+  } */
 
   public cleanup(canvas: HTMLCanvasElement) {
     this.canvases.delete(canvas);
@@ -102,9 +121,34 @@ export default class ChatBackgroundPatternRenderer {
 
   public fillCanvas(canvas: HTMLCanvasElement) {
     const context = canvas.getContext('2d');
-    context.fillStyle = this.pattern;
+    if(context.fillStyle instanceof CanvasPattern) {
+      context.clearRect(0, 0, canvas.width, canvas.height);
+    }
+
+    // const perf = performance.now();
+    const img = this.img;
+
+    let imageWidth = img.width, imageHeight = img.height;
+    // if(imageHeight < canvas.height) {
+      const ratio = canvas.height / imageHeight;
+      imageWidth *= ratio;
+      imageHeight = canvas.height;
+    // }
+
+    if(this.options.mask) {
+      context.fillStyle = '#000';
       context.fillRect(0, 0, canvas.width, canvas.height);
-    // context.drawImage(this.img, 0, 0, canvas.width, canvas.height);
+      context.globalCompositeOperation = 'destination-out';
+    } else {
+      context.globalCompositeOperation = 'source-over';
+    }
+
+    for(let x = 0; x < canvas.width; x += imageWidth) {
+      context.drawImage(img, x, 0);
+    }
+    // context.fillStyle = this.pattern;
+    // context.fillRect(0, 0, canvas.width, canvas.height);
+    // console.warn('fill canvas time', performance.now() - perf);
   }
 
   public setCanvasDimensions(canvas: HTMLCanvasElement) {
@@ -118,4 +162,34 @@ export default class ChatBackgroundPatternRenderer {
     this.setCanvasDimensions(canvas);
     return canvas;
   }
+
+  public resize(width: number, height: number) {
+    this.init({
+      ...this.options,
+      width,
+      height
+    });
+
+    const promises: Promise<any>[] = [];
+    for(const canvas of this.canvases) {
+      this.setCanvasDimensions(canvas);
+      promises.push(this.renderToCanvas(canvas));
+    }
+
+    return Promise.all(promises);
+  }
+
+  public static resizeInstances(width: number, height: number) {
+    return Promise.all(this.INSTANCES.map(instance => instance.resize(width, height)));
+  }
+
+  /* public setResizeMode(resizing: boolean) {
+    const canvases = Array.from(this.canvases);
+    const canvas = canvases[canvases.length - 1];
+    canvas.style.display = resizing ? 'none' : '';
+    const img = this.img;
+    img.style.display = resizing ? '' : 'none';
+
+    return {img, canvas};
+  } */
 }

src/helpers/dom/renderImageFromUrl.ts

@@ -61,7 +61,7 @@ export default function renderImageFromUrl(
 }
 
 export function renderImageFromUrlPromise(elem: Parameters<typeof renderImageFromUrl>[0], url: string, useCache?: boolean) {
-  return new Promise((resolve) => {
+  return new Promise<Event>((resolve) => {
     renderImageFromUrl(elem, url, resolve, useCache);
   });
 }

src/lib/appManagers/appImManager.ts

@@ -84,6 +84,7 @@ import htmlToSpan from '../../helpers/dom/htmlToSpan';
 import getVisibleRect from '../../helpers/dom/getVisibleRect';
 import { simulateClickEvent } from '../../helpers/dom/clickEvent';
 import appReactionsManager from './appReactionsManager';
+import ChatBackgroundPatternRenderer from '../../components/chat/patternRenderer';
 
 //console.log('appImManager included33!');
 
@@ -229,11 +230,17 @@ export class AppImManager {
       this.appendEmojiAnimationContainer(to);
     });
 
-    const resizeBackgroundDebounced = debounce(() => {
-      this.setBackground(this.lastBackgroundUrl, false);
-    }, 200, false, true);
     mediaSizes.addEventListener('resize', () => {
-      resizeBackgroundDebounced();
+      // const perf = performance.now();
+      const rect = this.chatsContainer.getBoundingClientRect();
+      ChatBackgroundPatternRenderer.resizeInstances(rect.width, rect.height).then(() => {
+        // this.log.warn('resize bg time:', performance.now() - perf);
+        // for(const chat of this.chats) {
+        //   if(chat.renderDarkPattern) {
+        //     chat.renderDarkPattern();
+        //   }
+        // }
+      });
     });
 
     rootScope.addEventListener('history_focus', (e) => {

src/scss/partials/_chat.scss

@@ -722,7 +722,7 @@ $background-transition-total-time: #{$input-transition-time - $background-transi
         width: 100%;
       }
 
-      &-pattern-canvas {
+      &:not(.is-dark) &-pattern-canvas {
         mix-blend-mode: overlay;
         // height: 100%;
       }