Actually working pip install now. Added OpenGL modularity.
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README.md
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README.md
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@ -25,14 +25,22 @@ using openlut's toolkit.
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Installation
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-----
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I'll put it on pip eventually (when I figure out how!). For now, just download the repository.
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Simply use pip: `sudo pip3 install openlut` (pip3 denotes that you must use a Python 3 version of pip). Keep in mind, there are some external dependencies:
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* **Python 3.5**: This is Python; you need Python.
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* **gcc**: This is needed to compile the C++ extensions.
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* **pybind11**: This is a library needed to link the C++ extension into Python. pip version is being difficult...
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* **imagemagick**: For all file IO. It's not like I was gonna write that myself :) .
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To run openlut.py, first make sure you have the *Dependencies*. To run the test code at the bottom (make sure openlut is in the same
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directory as testpath; it needs to load test.exr), you can then run:
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*If it's breaking, try running `sudo pip3 install -U pip setuptools`. Sometimes they are out of date.*
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`python3 main.py -t`
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Installing Dependencies
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-----
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Not Difficult, I promise!
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To use in your code, simply `import` the module at the top of your file.
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On Debian/Ubuntu: `sudo apt-get install python3-pip gcc pybind11-dev libmagickwand-dev`
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On Mac: `brew install python3 gcc pybind11 imagemagick`
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* You will need Homebrew ( copy/paste a command from http://brew.sh/ ) and XCode Command Line Tools for gcc (it should prompt you to install this).
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* Disclaimer - gcc took its sweet time compiling/installing on my old Mac...
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Dependencies
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@ -44,7 +52,8 @@ If you're on a **Mac**, run this to get python3 and pip3: `brew install python3;
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If you're on **Linux**, you should already have python3 and pip3 - otherwise see your distribution repositories.
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### Dependency Installation
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Run this to get all deps: `sudo pip3 install numpy wand numba scipy`
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You need **Python 3.5**, **Pip**, a newer version (must support C++14) of **gcc**, and pybind11 in your `includes`. This is trivial on Debian/Ubuntu:
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* `sudo apt-get install python3-pip
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Basic Library Usage
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-----
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@ -57,55 +66,4 @@ The **Transform** objects themselves have plenty of features - like LUT, with `o
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input matrices, or automatic spline-based interpolation of very small 1D LUTs - to make them helpful in and of themselves!
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The best way to demonstrate this, I think, is to show some test code: (run python3 openlut.py -t to see it work)
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```python
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#Open any format image. Try it with exr/dpx/anything!
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img = ColMap.open('testpath/test.exr') #Opens a test image 'test.exr', creating a ColMap object, automatically using the best image backend available to load the image at the correct bit depth.
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'''
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Gamma has gamma functions like Gamma.sRGB, called by value like Gamma.sRGB(val). All take one argument, the value (x), and returns the transformed value. Color doesn't matter for gamma.
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TransMat has matrices, in 3x3 numpy array form. All are relative to ACES, with direction aptly named. So, TransMat.XYZ is a matrix from ACES --> XYZ, while TransMat.XYZinv goes from XYZ --> ACES. All use/are converted to the D65 illuminant, for consistency sake.
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'''
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#Gamma Functions: sRGB --> Linear.
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gFunc = Gamma(Gamma.sRGBinv) #A Gamma Transform object using the sRGB-->Linear gamma formula. Apply to ColMaps!
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gFuncManualsRGB = Gamma(lambda val: ((val + 0.055) / 1.055) ** 2.4 if val > 0.04045 else val / 12.92) #It's generic - specify any gamma function, even inline with a lambda!
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#LUT from Function: sRGB --> Linear
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oLut = LUT.lutFunc(Gamma.sRGBinv) #A LUT Transform object, created from a gamma function. Size is 16384 by default. LUTs are faster!
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oLut.save('testpath/sRGB-->Lin.cube') #Saves the LUT to a format inferred from the extension. cube only for now!
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#Opening LUTs from .cube files.
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lut = LUT.open('testpath/sRGB-->Lin.cube') #Opens the lut we just made into a different LUT object.
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lut.resized(17).save('testpath/sRGB-->Lin_tiny.cube') #Resizes the LUT, then saves it again to a much smaller file!
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#Matrix Transformations
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simpleMat = TransMat(TransMat.sRGBinv) #A Matrix Transform (TransMat) object, created from a color transform matrix for gamut transformations! This one is sRGB --> ACES.
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mat = TransMat(TransMat.sRGBinv, TransMat.XYZ, TransMat.XYZinv, TransMat.aRGB) * TransMat.aRGBinv
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#Indeed, specify many matrices which auto-multiply into a single one! You can also combine them after, with simple multiplication.
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#Applying and saving.
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img.apply(gFunc).save('testpath/openlut_gammafunc.png') #save saves an image using the appropriate image backend, based on the extension.
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img.apply(lut).save('testpath/openlut_lut-lin-16384.png') #apply applies any color transformation object that inherits from Transform - LUT, Gamma, TransMat, etc., or make your own! It's easy ;) .
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img.apply(lut.resized(17)).save('testpath/openlut_lut-lin-17.png') #Why so small? Because spline interpolation automatically turns on. It's identical to the larger LUT!
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img.apply(mat).save('testpath/openlut_mat.png') #Applies the gamut transformation.
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#As a proof of concept, here's a long list of transformations that should, in sum, do nothing :) :
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img.apply(lut).apply(LUT.lutFunc(Gamma.sRGB)).apply(mat).apply(~mat).save('testpath/openlut_noop.png') #~mat is the inverse of mat. Easily undo the gamut operation!
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#Format Test: All output images are in Linear ACES.
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tImg = img.apply(mat)
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tImg.save('testpath/output.exr')
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tImg.save('testpath/output.dpx')
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tImg.save('testpath/output.png')
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tImg.save('testpath/output.jpg')
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tImg.save('testpath/output.tif') #All sorts of formats work! Bit depth is 16, unless you say something else.
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#Compression is impossible right now - wand is being difficult.
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#Keep in mind, values are clipped from 0 to 1 when done. Scary transforms can make this an issue!
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#Color management of openlut itself is simple: openlut doesn't touch your data, unless you tell it to with a Transform. So, the data that goes in, goes out, unless a Transform was applied.
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```
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Take a look at the test code under tests for examples.
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@ -1,7 +1,14 @@
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import pygame
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from pygame.locals import *
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MOD_OPENGL = True
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try :
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from OpenGL.GL import *
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from OpenGL.GLU import *
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except :
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print('Unable to load OpenGL. Make sure your graphics drivers are installed & up to date!')
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MOD_OPENGL = False
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import sys, os, os.path
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@ -99,6 +106,8 @@ class Viewer :
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'''
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img is an rgb array.
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'''
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if not MOD_OPENGL: print("OpenGL not enabled. Viewer won't start."); return
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v = Viewer((xRes, yRes), title)
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v.bindTex(img)
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14
setup.py
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setup.py
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@ -1,21 +1,33 @@
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#!/usr/bin/env python3
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import sys, os
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import os.path as path
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#~ from sysconfig import get_python_version, get_path
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from setuptools import setup
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from setuptools import Extension
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from setuptools import find_packages
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#Weirdly long way to get to the actual header files we need to include.
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#~ pyPath = path.join(path.abspath(get_path('include') + os.sep + '..'), 'site/python{}'.format(get_python_version()))
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#Better - Mac & Linux only.
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#~ pyPath = '/usr/local/include/python{}'.format(get_python_version())'
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cpp_args = ['-fopenmp', '-std=gnu++14']
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link_args = ['-fopenmp']
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olOpt = Extension( 'openlut.lib.olOpt',
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sources = ['openlut/lib/olOpt.cpp'],
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#~ include_dirs=[pyPath], #Include from the the python3 source code.
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language = 'c++',
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extra_compile_args = cpp_args,
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extra_link_args = cpp_args
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)
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setup( name = 'openlut',
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version = '0.1.1',
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version = '0.1.4',
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description = 'OpenLUT is a practical color management library.',
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author = 'Sofus Rose',
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author_email = 'sofus@sofusrose.com',
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