56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2011-2015 Danny Robson <danny@nerdcruft.net>
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*/
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#include "noise.hpp"
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#include "range.hpp"
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#include <iostream>
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#include <limits>
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//-----------------------------------------------------------------------------
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template <typename T>
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void
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util::noise::fill (image::buffer<1,T> &pixels,
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const util::noise::fractal<T> &gen)
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{
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size_t h = pixels.h, s = pixels.s, w = pixels.w;
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T *data = pixels.data ();
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for (size_t y = 0; y < h; ++y)
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for (size_t x = 0; x < w; ++x)
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data[y * s + x] = gen ({T(x), T(y)});
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}
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template void util::noise::fill (image::buffer<1,float>&, const util::noise::fractal<float>&);
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template void util::noise::fill (image::buffer<1,double>&, const util::noise::fractal<double>&);
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//-----------------------------------------------------------------------------
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void
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util::noise::image2d (uint8_t *restrict pixels,
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size_t width,
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size_t height,
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const util::noise::fractal<float> &p) {
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for (size_t y = 0; y < height; ++y)
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for (size_t x = 0; x < width; ++x) {
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float v = p ({float(x), float(y)});
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pixels[x + y * width] = static_cast<uint8_t> (v * std::numeric_limits<uint8_t>::max ());
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}
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}
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