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48 lines
1.0 KiB
48 lines
1.0 KiB
//
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// Tonemapper.hpp
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// AwesomeAttractorND
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//
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// Created by Joshua Moerman on 10/28/11.
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// Copyright 2011 Vadovas. All rights reserved.
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//
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#ifndef AwesomeAttractorND_Tonemapper_hpp
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#define AwesomeAttractorND_Tonemapper_hpp
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#include <algorithm>
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#include <cmath>
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namespace Tonemappers {
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struct Normalizer2D {
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Normalizer2D()
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: max(0)
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{}
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template <typename C>
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void analyse(C const & canvas){
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//max = *std::max_element(canvas.cbegin(), canvas.cend());
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for (size_t x = 0; x < canvas.get_size(0); ++x) {
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for (size_t y = 0; y < canvas.get_size(1); ++y) {
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max = std::max(max, (unsigned int)canvas[x][y]);
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}
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}
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}
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template <typename C, typename I>
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void process(C const & canvas, I & image){
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for (size_t x = 0; x < canvas.get_size(0); ++x) {
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for (size_t y = 0; y < canvas.get_size(1); ++y) {
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const double grayscale = (double) canvas[x][y] / (double) max;
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image << typename I::pixel(std::pow(grayscale, 0.2), std::pow(grayscale, 0.6), grayscale*1.5);
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}
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}
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}
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private:
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unsigned int max;
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};
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}
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#endif
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