https://github.com/bernhardfritz/blendmodes

This OpenGL-based tool allows you to perform basic image blending operations using the CLI.
https://github.com/bernhardfritz/blendmodes

blend-modes c cli command-line-tool glsl opengl shaders

Last synced: 10 months ago
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This OpenGL-based tool allows you to perform basic image blending operations using the CLI.

• Host: GitHub
• URL: https://github.com/bernhardfritz/blendmodes
• Owner: bernhardfritz
• Created: 2017-11-08T00:10:44.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2017-11-08T00:26:29.000Z (over 8 years ago)
• Last Synced: 2025-07-07T02:05:33.185Z (12 months ago)
• Topics: blend-modes, c, cli, command-line-tool, glsl, opengl, shaders
• Language: C
• Homepage:
• Size: 1.18 MB
• Stars: 5
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

          
### blendmodes

This OpenGL-based tool allows you to perform basic image blending operations using the CLI. An OpenGL 2.0+ compatible graphics card is required for this tool to work. Systems without a graphics card are currently out of luck. However, software rendering mode is coming soon!

#### Requirements

* [glfw](http://www.glfw.org/)

#### Instructions

```

make

./bm backgroundFilename foregroundFilename outputFilename blendMode blendOpacity

```

**Example:** ```./bm lena.png baboon.png lenaAddBaboon.png 0 1.0```

| Background                           | Foreground                           | Output                               | Blend mode      | Blend opacity |

|:------------------------------------:|:------------------------------------:|:------------------------------------:|-----------------|:-------------:|

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/sJzhepN.png) | 0: add          | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/gIQKb3f.png) | 1: average      | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/DIOdLqq.png) | 2: colorBurn    | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/hpqmcGh.png) | 3: colorDodge   | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/hi2flFf.png) | 4: darken       | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/jEpFxqG.png) | 5: difference   | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/SYARHnF.png) | 6: exclusion    | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/F7bmvGc.png) | 7: glow         | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/LNGswtP.png) | 8: hardLight    | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/8mMOOJ2.png) | 9: hardMix      | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/LxQwUtK.png) | 10: lighten     | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/FgIlJ0n.png) | 11: linearBurn  | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/6BkFVwn.png) | 12: linearDodge | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/9ABKRwO.png) | 13: linearLight | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/OO19r9v.png) | 14: multiply    | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/BoUOVcG.png) | 15: negation    | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/aSErNpA.png) | 16: normal      | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/2bOSFpw.png) | 17: overlay     | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/wI9IYrO.png) | 18: phoenix     | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/GtZEqfS.png) | 19: pinLight    | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/Ae9wLEU.png) | 20: reflect     | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/RuGGGGh.png) | 21: screen      | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/CMObCms.png) | 22: softLight   | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/UkCt810.png) | 23: subtract    | 1.0           |

| ![](https://i.imgur.com/dwnT1rz.png) | ![](https://i.imgur.com/EpcbGTg.png) | ![](https://i.imgur.com/AdM5OkV.png) | 24: vividLight  | 1.0           |

**Supported image types**:

* png

* bmp

* tga

* jpg

**Supported platforms**:

* Windows (Makefile coming soon!)

* Linux (Makefile coming soon!)

* macOSX

#### Credits

* Shaders inspired by [glsl-blend](https://github.com/jamieowen/glsl-blend)

* Sean T. Barrett for his fantastic C library [stb](https://github.com/nothings/stb)

#### TODO

* Adapt Makefile for Windows and Linux

* Allow to set x and y offsets for foreground and background using CLI parameters

* Write man page

* Add support for software rendering mode