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[WIP] react-native-GPUImage\n\n![](https://img.shields.io/badge/license-MIT-000000.svg)\n[![npm](https://img.shields.io/npm/dm/wj-react-native-gpuimage.svg)](https://www.npmjs.com/package/wj-react-native-gpuimage)\n[![npm](https://img.shields.io/npm/v/wj-react-native-gpuimage.svg)](https://www.npmjs.com/package/wj-react-native-gpuimage)\n![](https://img.shields.io/badge/platform-react--native-brightgreen.svg)\n\nGPUImage Component for React Native\n\nInspired by [GPUImage](https://github.com/BradLarson/GPUImage) and [GPUImage for Android](https://github.com/CyberAgent/android-gpuimage)\n\n[SHOWCASE](#user-content-showcase)\n\n## DEPENDENCIES\n\n- React-Native \u003e 0.40\n- gl-react\n- gl-react-native\n\n## DOC \n\n### INSTALL\n\n1. `npm i gl-react --save`\n2. `npm i gl-react-native --save`\n3. `npm i gl-react-image --save` [optional, but recommended]\n4. `npm i wj-react-native-gpuimage --save`\n5. edit file *android/src/main/java/com/projectseptember/RNGL/RNGLContext.java* in *node_module/gl-react-native/* as showed in [NOTE](#user-content-note) part\n\n### USAGE\n\n* BASIC\n\n```\nimport * as GPUImage from \"wj-react-native-gpuimage\";\n\n...\n\nrender() {\n    return (\n        \u003cSurface width={300} height={300}\u003e\n             \u003cGPUImage.GPUImageColorInvertFilter\u003e\n                 \u003cGLImage\n                     source={{url: \"https://avatars3.githubusercontent.com/u/3667305?v=3\u0026s=460\", width: 300, height: 300}}\n                     resizeMode=\"stretch\"\n                 /\u003e\n             \u003c/GPUImage.GPUImageColorInvertFilter\u003e\n        \u003c/Surface\u003e\n    );\n}\n...\n```\n\n* CUSTOM SHADER\n\n```\nimport * as GPUImage from \"wj-react-native-gpuimage\";\n...\nrender() {\n    return (\n        \u003cSurface width={300} height={300}\u003e\n            \u003cGPUImage.GPUImageFilter\n                 frag={`\nprecision highp float;\nvarying vec2 v_texCoord;\nuniform float u_red;\nvoid main() {\n    gl_FragColor = vec4(u_red, v_texCoord.x, v_texCoord.y, 1.0);\n}\n                 `}\n                 uniforms={{\n                     u_red: 0.5,\n                 }}\n            \u003e\n            \u003c/GPUImage.GPUImageFilter\u003e\n        \u003c/Surface\u003e\n    );\n}\n...\n```\n\n* GROUP\n\n```\nimport * as GPUImage from \"wj-react-native-gpuimage\";\n...\nrender() {\n    return (\n        \u003cSurface width={300} height={300}\u003e\n             \u003cGPUImage.GPUImageColorInvertFilter\u003e\n                 \u003cGPUImage.GPUImageHalftoneFilter fractionalWidthOfPixel={0.2}\u003e\n                     \u003cGLImage\n                         source={{url: \"https://avatars3.githubusercontent.com/u/3667305?v=3\u0026s=460\", width: 300, height: 300}}\n                         resizeMode=\"stretch\"\n                     /\u003e\n                 \u003c/GPUImage.GPUImageHalftoneFilter\u003e\n             \u003c/GPUImage.GPUImageColorInvertFilter\u003e\n        \u003c/Surface\u003e\n    );\n}\n...\n```\n\nCheck [example](https://github.com/CubeSugar/react-native-GPUImage/tree/master/example) for more details.\n\n1. `cd example`\n2. `npm install`\n3. edit *RNGLContext.java*\n4. `react-native run-android` or `react-native run-ios`\n\n## NOTE\n- vertex shader support for Android\n\n```\n// gl-react-native proj\n// android/src/main/java/com/projectseptember/RNGL/RNGLContext.java\npublic void addShader (final Integer id, final ReadableMap config, final Callback onCompile) {\n    final String frag = config.getString(\"frag\");\n    final String name = config.getString(\"name\");\n    //shaders.put(id, new GLShaderData(name, STATIC_VERT, frag));\n    String vert = STATIC_VERT;\n    if (config.hasKey(\"vert\")) {\n        vert = config.getString(\"vert\");\n    }\n    shaders.put(id, new GLShaderData(name, vert, frag));\n    if (onCompile != null) {\n        onCompileCallbacks.put(id, onCompile);\n    }\n}\n```\n\n## SHOWCASE\n\n![PixelateEffect](https://github.com/CubeSugar/react-native-GPUImage/blob/master/example/showcase/pixelate.png?raw=true)\n![HalftoonEffect](https://github.com/CubeSugar/react-native-GPUImage/blob/master/example/showcase/halftoon.png?raw=true)\n![PolkaDotEffect](https://github.com/CubeSugar/react-native-GPUImage/blob/master/example/showcase/polkadot.png?raw=true)\n![VignetteEffect](https://github.com/CubeSugar/react-native-GPUImage/blob/master/example/showcase/vignette.png?raw=true)\n![CannyEdgeDetect](https://github.com/CubeSugar/react-native-GPUImage/blob/master/example/showcase/cannyedgedetection.png?raw=true)\n\n## PROGRESS\n\n#### Filters\n- [x] GPUImageFilter\n- [x] GPUImageTwoInputFilter\n- [x] GPUImage3x3TextureSamplingFilter\n\n#### Color processing\n- [x] GPUImageBrightnessFilter\n- [ ] GPUImageLevelsFilter\n- [ ] GPUImageExposureFilter\n- [x] GPUImageContrastFilter\n- [x] GPUImageSaturationFilter\n- [x] GPUImageGammaFilter\n- [x] GPUImageColorMatrixFilter\n- [x] GPUImageRGBFilter\n- [ ] GPUImageHSBFilter\n- [ ] GPUImageHueFilter\n- [x] GPUImageColorInvertFilter\n- [x] GPUImageGrayscaleFilter\n- [x] GPUImageLuminanceThresholdFilter\n\n#### Image processing\n- [x] GPUImage3x3ConvolutionFilter\n- [x] GPUImageLocalBinaryPatternFilter\n- [x] GPUImageColorLocalBinaryPatternFilter\n- [x] GPUImageSobelEdgeDetectionFilter\n- [x] GPUImageThresholdEdgeDetectionFilter\n- [x] GPUImageDirectionalSobelEdgeDetectionFilter\n- [x] GPUImageDirectionalNonMaximumSuppressionFilter\n- [x] GPUImageWeakPixelInclusionFilter\n- [x] GPUImageCannyEdgeDetectionFilter\n\n#### Blends\n- [x] GPUImageSourceOverBlendFilter\n- [x] GPUImageColorBurnBlendFilter\n- [x] GPUImageColorDodgeBlendFilter\n- [x] GPUImageDarkenBlendFilter\n- [x] GPUImageDifferenceBlendFilter\n- [x] GPUImageDissolveBlendFilter\n- [x] GPUImageExclusionBlendFilter\n- [x] GPUImageHardLightBlendFilter\n- [x] GPUImageSoftLightBlendFilter\n- [x] GPUImageLightenBlendFilter\n- [x] GPUImageAddBlendFilter\n- [x] 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