Extract OpenGL Renderer from Mittsu

.codeclimate.yml

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+---
+engines:
+  duplication:
+    enabled: true
+    config:
+      languages:
+      - ruby
+  fixme:
+    enabled: true
+  rubocop:
+    enabled: true
+ratings:
+  paths:
+  - "**.rb"
+exclude_paths:
+- test/
+- examples/
+- bin/

.github/workflows/build-workflow.yml

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+name: Build
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  linux:
+    name: Linux
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ['2.6', '2.7', '3.0', '3.1', '3.2', '3.3', 'head']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: awalsh128/cache-apt-pkgs-action@v1
+        with:
+          packages: libglfw3
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Test & publish code coverage
+        uses: paambaati/codeclimate-action@v2.2.1
+        if: github.event_name == 'push'
+        env:
+          CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
+        with:
+          coverageCommand: bundle exec rake test
+      - name: Test
+        if: github.event_name != 'push'
+        run: bundle exec rake test
+
+  macos:
+    name: macOS
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        ruby: ['2.6', '2.7', '3.0', '3.1', '3.2', '3.3', 'head']
+    steps:
+      - uses: actions/checkout@v4
+      - run: brew install glfw
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - run: bundle exec rake test
+
+  windows:
+    name: Windows
+    runs-on: windows-latest
+    env:
+      MITTSU_LIBGLFW_PATH: c:\projects\mittsu\glfw-3.3.1.bin.WIN32\lib-mingw
+    strategy:
+      matrix:
+        ruby: ['2.6', '2.7', '3.0', '3.1', '3.2', '3.3', 'head']
+    steps:
+      - uses: actions/checkout@v4
+      - run: .\install-glfw.ps1
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - run: bundle exec rake test

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+/test/reports
+*.gem
+.tool-versions