Add a way to make transparent PNGs opaque.

source/2022-03-06.ts

@@ -56,6 +56,7 @@ const project: Project = {
       midpoint: 0.6,
     }),
   ],
+  resetAlpha: false,
   resolution: {
     width,
     height,

source/2022-03-07.ts

@@ -51,6 +51,7 @@ const project: Project = {
     }),
     new Generic('gegl:median-blur'),
   ],
+  resetAlpha: false,
   resolution: {
     width,
     height,

source/2022-03-08.ts

@@ -33,6 +33,7 @@ const project: Project = {
       shape: 'circle',
     }),
   ],
+  resetAlpha: false,
   resolution: {
     width,
     height,

source/driftingnebula.ts

@@ -18,7 +18,13 @@ async function main(): Promise<void> {
 
   const projects: Project[] = [d2022_03_06, d2022_03_07, d2022_03_08];
 
-  for (const {createInputImage, name, operations, resolution} of projects) {
+  for (const {
+    createInputImage,
+    name,
+    operations,
+    resolution,
+    resetAlpha,
+  } of projects) {
     const dataStart = performance.now();
     const {width, height} = resolution;
 
@@ -74,6 +80,15 @@ async function main(): Promise<void> {
         ...graph,
       ]);
 
+      if (resetAlpha) {
+        await execa('convert', [
+          fullOutputFile,
+          '-alpha',
+          'Off',
+          fullOutputFile,
+        ]);
+      }
+
       console.log(`* Writing ${compressedFile}`);
       await execa('magick', [
         'convert',

source/project.ts

@@ -4,6 +4,7 @@ export default interface Project {
   createInputImage: boolean;
   name: string;
   operations: Array<InstanceType<typeof BaseOperation>>;
+  resetAlpha: boolean;
   resolution: {
     height: number;
     width: number;