feat: create transparent png

src/pages/home/index.tsx

@@ -18,7 +18,7 @@ import Button from '@mui/material/Button';
 const exampleTools: { label: string; url: string }[] = [
   {
     label: 'Create a transparent image',
-    url: ''
+    url: '/png/create-transparent'
   },
   { label: 'Convert text to morse code', url: '/string/to-morse' },
   { label: 'Change GIF speed', url: '' },

src/pages/image/png/create-transparent/index.tsx

@@ -0,0 +1,156 @@
+import { Box } from '@mui/material';
+import React, { useEffect, useState } from 'react';
+import * as Yup from 'yup';
+import ToolFileInput from '../../../../components/input/ToolFileInput';
+import ToolFileResult from '../../../../components/result/ToolFileResult';
+import ToolOptions from '../../../../components/options/ToolOptions';
+import { Formik, useFormikContext } from 'formik';
+import ColorSelector from '../../../../components/options/ColorSelector';
+import Color from 'color';
+import TextFieldWithDesc from 'components/options/TextFieldWithDesc';
+import ToolInputAndResult from '../../../../components/ToolInputAndResult';
+import ToolOptionGroups from '../../../../components/options/ToolOptionGroups';
+
+const initialValues = {
+  fromColor: 'white',
+  similarity: '10'
+};
+const validationSchema = Yup.object({
+  // splitSeparator: Yup.string().required('The separator is required')
+});
+export default function ChangeColorsInPng() {
+  const [input, setInput] = useState<File | null>(null);
+  const [result, setResult] = useState<File | null>(null);
+
+  const FormikListenerComponent = ({ input }: { input: File }) => {
+    const { values } = useFormikContext<typeof initialValues>();
+    const { fromColor, similarity } = values;
+
+    useEffect(() => {
+      let fromRgb: [number, number, number];
+      try {
+        //@ts-ignore
+        fromRgb = Color(fromColor).rgb().array();
+      } catch (err) {
+        return;
+      }
+      const processImage = async (
+        file: File,
+        fromColor: [number, number, number],
+        similarity: number
+      ) => {
+        const canvas = document.createElement('canvas');
+        const ctx = canvas.getContext('2d');
+        if (ctx == null) return;
+        const img = new Image();
+
+        img.src = URL.createObjectURL(file);
+        await img.decode();
+
+        canvas.width = img.width;
+        canvas.height = img.height;
+        ctx.drawImage(img, 0, 0);
+
+        const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
+        const data: Uint8ClampedArray = imageData.data;
+
+        const colorDistance = (
+          c1: [number, number, number],
+          c2: [number, number, number]
+        ) => {
+          return Math.sqrt(
+            Math.pow(c1[0] - c2[0], 2) +
+              Math.pow(c1[1] - c2[1], 2) +
+              Math.pow(c1[2] - c2[2], 2)
+          );
+        };
+        const maxColorDistance = Math.sqrt(
+          Math.pow(255, 2) + Math.pow(255, 2) + Math.pow(255, 2)
+        );
+        const similarityThreshold = (similarity / 100) * maxColorDistance;
+
+        for (let i = 0; i < data.length; i += 4) {
+          const currentColor: [number, number, number] = [
+            data[i],
+            data[i + 1],
+            data[i + 2]
+          ];
+          if (colorDistance(currentColor, fromColor) <= similarityThreshold) {
+            data[i + 3] = 0; // Set alpha to 0 (transparent)
+          }
+        }
+
+        ctx.putImageData(imageData, 0, 0);
+
+        canvas.toBlob((blob) => {
+          if (blob) {
+            const newFile = new File([blob], file.name, { type: 'image/png' });
+            setResult(newFile);
+          }
+        }, 'image/png');
+      };
+
+      processImage(input, fromRgb, Number(similarity));
+    }, [input, fromColor]);
+
+    return null;
+  };
+
+  return (
+    <Box>
+      <ToolInputAndResult
+        input={
+          <ToolFileInput
+            value={input}
+            onChange={setInput}
+            accept={['image/png']}
+            title={'Input PNG'}
+          />
+        }
+        result={
+          <ToolFileResult
+            title={'Transparent PNG'}
+            value={result}
+            extension={'png'}
+          />
+        }
+      />
+      <ToolOptions>
+        <Formik
+          initialValues={initialValues}
+          validationSchema={validationSchema}
+          onSubmit={() => {}}
+        >
+          {({ setFieldValue, values }) => (
+            <Box>
+              {input && <FormikListenerComponent input={input} />}
+              <ToolOptionGroups
+                groups={[
+                  {
+                    title: 'From color and similarity',
+                    component: (
+                      <Box>
+                        <ColorSelector
+                          value={values.fromColor}
+                          onChange={(val) => setFieldValue('fromColor', val)}
+                          description={'Replace this color (from color)'}
+                        />
+                        <TextFieldWithDesc
+                          value={values.similarity}
+                          onChange={(val) => setFieldValue('similarity', val)}
+                          description={
+                            'Match this % of similar colors of the from color. For example, 10% white will match white and a little bit of gray.'
+                          }
+                        />
+                      </Box>
+                    )
+                  }
+                ]}
+              />
+            </Box>
+          )}
+        </Formik>
+      </ToolOptions>
+    </Box>
+  );
+}

src/pages/image/png/create-transparent/meta.ts

@@ -0,0 +1,13 @@
+import { defineTool } from '@tools/defineTool';
+import { lazy } from 'react';
+// import image from '@assets/text.png';
+
+export const tool = defineTool('png', {
+  name: 'Create transparent PNG',
+  path: 'create-transparent',
+  // image,
+  description:
+    "World's simplest online Portable Network Graphics transparency maker. Just import your PNG image in the editor on the left and you will instantly get a transparent PNG on the right. Free, quick, and very powerful. Import a PNG – get a transparent PNG.",
+  keywords: ['create', 'transparent'],
+  component: lazy(() => import('./index'))
+});

src/pages/image/png/index.ts

@@ -1,3 +1,4 @@
+import { tool as pngCreateTransparent } from './create-transparent/meta';
 import { tool as changeColorsInPng } from './change-colors-in-png/meta';
 
-export const pngTools = [changeColorsInPng];
+export const pngTools = [changeColorsInPng, pngCreateTransparent];

src/pages/number/sum/index.tsx

@@ -1,5 +1,4 @@
 import { Box, Stack } from '@mui/material';
-import Grid from '@mui/material/Grid';
 import React, { useContext, useEffect, useState } from 'react';
 import ToolTextInput from '../../../components/input/ToolTextInput';
 import ToolTextResult from '../../../components/result/ToolTextResult';