Go rewrite

.github/workflows/build.yml

@@ -0,0 +1,106 @@
+name: Build & Release
+
+on:
+  push:
+    branches: ["*"]
+  pull_request:
+    branches: ["*"]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+            artifact: colorblind
+          - goos: windows
+            goarch: amd64
+            artifact: colorblind.exe
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.24.x"
+
+      - name: Install fyne-cross
+        run: go install github.com/fyne-io/fyne-cross@latest
+
+      - name: Build ${{ matrix.goos }}/${{ matrix.goarch }}
+        run: fyne-cross ${{ matrix.goos }} -arch ${{ matrix.goarch }} -app-id com.colorblind.app -output colorblind
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: colorblind-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: fyne-cross/bin/${{ matrix.goos }}-${{ matrix.goarch }}/${{ matrix.artifact }}
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Get commit info
+        id: commit
+        run: echo "short_sha=$(git rev-parse --short HEAD)" >> "$GITHUB_OUTPUT"
+
+      - name: Package release assets
+        run: |
+          cd artifacts/colorblind-linux-amd64
+          tar czf ../../colorblind-linux-amd64.tar.gz colorblind
+          cd ../colorblind-windows-amd64
+          zip ../../colorblind-windows-amd64.zip colorblind.exe
+
+      - name: Create latest release
+        if: github.ref_name == 'master'
+        uses: ncipollo/release-action@v1
+        with:
+          tag: latest
+          name: Latest Release
+          artifacts: "colorblind-linux-amd64.tar.gz,colorblind-windows-amd64.zip"
+          allowUpdates: true
+          replacesArtifacts: true
+          makeLatest: true
+          prerelease: false
+          body: |
+            Latest build from `master`
+
+            Commit: ${{ github.sha }}
+            Short SHA: ${{ steps.commit.outputs.short_sha }}
+            Built on: ${{ github.event.head_commit.timestamp }}
+
+      - name: Create branch pre-release
+        if: github.ref_name != 'master'
+        uses: ncipollo/release-action@v1
+        with:
+          tag: ${{ github.ref_name }}
+          name: "Pre-release: ${{ github.ref_name }}"
+          artifacts: "colorblind-linux-amd64.tar.gz,colorblind-windows-amd64.zip"
+          allowUpdates: true
+          replacesArtifacts: true
+          makeLatest: false
+          prerelease: true
+          body: |
+            Pre-release build from branch: `${{ github.ref_name }}`
+
+            Commit: ${{ github.sha }}
+            Short SHA: ${{ steps.commit.outputs.short_sha }}
+            Built on: ${{ github.event.head_commit.timestamp }}

.gitignore

@@ -1 +1,2 @@
 /bin/
+/colorblind

README.md

@@ -1,21 +1,12 @@
 # ColorBlind
-A Java application to generate reverse colorblindness tests
 
+A Go desktop application that generates Ishihara-style reverse colorblindness test plates.
 
-This application is intended to:
+The app fills a canvas with thousands of same-colored circles, then recolors circles inside a hidden shape with a slightly different shade of magenta. To someone with normal color vision, the plate looks uniform. To someone with a specific type of color blindness, the hidden shape becomes clearly visible.
 
--Learn javaFX, which i will use during this last university year
+## How it works
 
--Practice programming (damn, i need to improve my OOP skills!)
-
--Provide the colorblind community (and thus myself too) a tool to draw reverse colorblind tests
-
--Have fun
-
-
-I will base my work on this theory:
-https://www.reddit.com/r/ColorBlind/comments/2ds5u1/this_is_a_reversecolorblind_test_normal_color/cjsxha1
-quoting the post:
+Based on [this theory](https://www.reddit.com/r/ColorBlind/comments/2ds5u1/this_is_a_reversecolorblind_test_normal_color/cjsxha1):
 
 (hit ctrl-f and press either 3 or 4 or 5)
 
@@ -51,5 +42,35 @@ As viewed by a color regular, its just a block of numbers. As viewed by someone
 
 a clearly identifiable shape.
 
+The app applies this same principle visually — using two nearly identical magenta shades that only become distinguishable to people with specific color vision deficiencies.
+
+## Screenshots
+
+![App UI](program_preview.png)
+
+![Example output](reverse_colorblind.png)
+
+See [old output examples/](old%20output%20examples/) for outputs from the original Java version, or check out the [`original-java`](https://github.com/nikooo777/ColorBlind/tree/original-java) branch for the original JavaFX implementation — a learning project for OOP and JavaFX.
+
+## Building
+
+Requires Go and Fyne system libraries on Linux:
+
+```bash
+sudo apt-get install libgl-dev libx11-dev libxrandr-dev libxxf86vm-dev libxi-dev libxcursor-dev libxinerama-dev
+```
+
+```bash
+go build -o colorblind .
+./colorblind
+```
+
+## Controls
 
-I hope you enjoy!
+- **Generate** — creates a new plate with randomized circle positions and a hidden shape
+- **Hidden Shape** — choose between a random circle or custom text as the hidden pattern
+- **Density slider** — controls how many circles to place (10–2000)
+- **Shade slider** — adjusts the magenta shade used for the hidden pattern; move it until the difference is barely perceptible to you
+- **Confuser color** — pick a third color (via HSV picker, hex input, or presets) applied to 10% of non-shape circles to add visual noise
+- **Show Shape toggle** — reveals the hidden shape outline for verification
+- **File → Save PNG** — export the current plate as a PNG image