Added /pride

config.default.json

@@ -436,6 +436,23 @@
           "size": 1200
         }
       }
+    },
+    "pride": {
+      "src": "./resources/PrideOverlay.png",
+      "z": 2,
+      "anchor": {
+        "x": {
+          "position": 0,
+          "offset": 0,
+          "size": 512
+        },
+        "y": {
+          "position": 0,
+          "offset": 0,
+          "size": 512
+        }
+      },
+      "filter": "pride"
     }
   }
 }

filters.js

@@ -0,0 +1,31 @@
+const _ = require('lodash');
+const Canvas = require('canvas');
+const { _drawImage } = require('./imageex');
+
+const { createCanvas, Image } = Canvas;
+
+const filters = {
+  pride: (canvas, source, x, y, props) => {
+    _.each(canvas.frames, frame => {
+      const tmpCanvas = createCanvas(frame.canvas.width, frame.canvas.height);
+      const tmpCtx = tmpCanvas.getContext('2d');
+      _drawImage(tmpCtx, frame.canvas, x, y, props);
+      const multiplyProps = _.extend({}, props, { attributes: { globalCompositeOperation: 'multiply' } });
+      _drawImage(tmpCtx, source.frames[0].canvas, x, y, multiplyProps);
+
+
+      const tmpCanvas2 = createCanvas(frame.canvas.width, frame.canvas.height);
+      const tmpCtx2 = tmpCanvas2.getContext('2d');
+      _drawImage(tmpCtx2, frame.canvas, x, y, props);
+      const sourceInProps = _.extend({}, props, { attributes: { globalCompositeOperation: 'source-in' } });
+      _drawImage(tmpCtx2, source.frames[0].canvas, x, y, sourceInProps);
+
+      const combineProps2 = _.extend({}, props, { attributes: { globalCompositeOperation: 'source-atop', globalAlpha: 0.9 } });
+      _drawImage(frame.ctx, tmpCanvas2, x, y, combineProps2);
+      const combineProps = _.extend({}, props, { attributes: { globalCompositeOperation: 'source-atop', globalAlpha: 0.8 } });
+      _drawImage(frame.ctx, tmpCanvas, x, y, combineProps);
+    });
+    return canvas;
+  }
+};
+module.exports = filters;

imageex.js

@@ -289,5 +289,6 @@ class CanvasEx {
 
 module.exports = {
   CanvasEx,
-  ImageEx
+  ImageEx,
+  _drawImage
 };

index.js

@@ -9,6 +9,8 @@ const twemoji = require('./twemoji');
 const app = express();
 const config = require('./config.default.json');
 
+const filters = require('./filters.js');
+
 try {
   _.extend(config, require('./config')); // eslint-disable-line global-require
 } catch (err) {
@@ -113,10 +115,11 @@ function render(template, img, size, flipH) {
     w: template.image.width * templateScale,
     name: `template ${template.src}`,
     flipH,
-    attributes: template.attributes
+    attributes: template.attributes,
+    filter: filters[template.filter]
   }].sort((u, v) => u.z > v.z);
 
-  const canvas = new CanvasEx(resultingWidth, resultingHeight);
+  let canvas = new CanvasEx(resultingWidth, resultingHeight);
 
   for (let i = 0; i < toDraw.length; ++i) {
     const subject = toDraw[i];
@@ -127,9 +130,15 @@ function render(template, img, size, flipH) {
         transform.translate = [resultingWidth, 0];
         transform.scale = [-1, 1];
       }
+      if (subject.filter) {
+        canvas = subject.filter(canvas, subject.image, subject.x, subject.y, {
+          width: subject.w, height: subject.h, transform, attributes: subject.attributes
+        });
+      } else {
         canvas.drawImage(subject.image, subject.x, subject.y, {
           width: subject.w, height: subject.h, transform, attributes: subject.attributes
         });
+      }
     } catch (err) {
       console.error(err);
       throw new Error(JSON.stringify({ status: 400, error: 'Invalid template' }));