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

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
			0: add	1.0
			1: average	1.0
			2: colorBurn	1.0
			3: colorDodge	1.0
			4: darken	1.0
			5: difference	1.0
			6: exclusion	1.0
			7: glow	1.0
			8: hardLight	1.0
			9: hardMix	1.0
			10: lighten	1.0
			11: linearBurn	1.0
			12: linearDodge	1.0
			13: linearLight	1.0
			14: multiply	1.0
			15: negation	1.0
			16: normal	1.0
			17: overlay	1.0
			18: phoenix	1.0
			19: pinLight	1.0
			20: reflect	1.0
			21: screen	1.0
			22: softLight	1.0
			23: subtract	1.0
			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
• Sean T. Barrett for his fantastic C library 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