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45 lines
2.1 KiB
C++
45 lines
2.1 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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// what the automatic exposure and the bloom of the renderers share (the part of the stage S3 of
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// claude/gl46-renderer-features-plan.md which isn't the work of the gpu, taken out of opengl46_exposure for the vulkan renderer,
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// stage P1 of claude/vulkan14-renderer-plan.md): the parameters of the histogram and of the adaptation
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// (exposure_histogram.comp, exposure_average.comp), the sizes of the levels of the bloom chain and the parameters of its steps
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// (postfx_bloom_*.frag), the parameters of the tonemapping and the controls of the debug window
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#pragma once
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#include <cstddef>
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#include <vector>
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namespace gfx
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{
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struct exposure_settings
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{
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// x: log2 of the lowest luminance binned, y: bins per unit of log2 luminance (exposure_histogram.comp)
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static glm::vec2 histogram_range();
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// x: log2 of the lowest luminance binned, y: log2 luminance per bin (exposure_average.comp)
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static glm::vec2 average_range();
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// x: time since the last measurement (Deltatime, s), y, z: rates of the adaptation to a darker and a brighter image, w: key
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static glm::vec4 adaptation(double const Deltatime);
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// the lowest and the highest exposure (multipliers)
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static glm::vec2 exposure_range();
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// the sizes of the levels of the bloom chain of an image, half the size each, as many as there are (empty: no chain)
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static std::vector<glm::ivec2> bloom_sizes(int const Width, int const Height);
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// param[0] of a step down the chain (postfx_bloom_down.frag): Level 0 is the first one, from the image itself
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static glm::vec4 bloom_params(std::size_t const Level);
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// parameters of the tonemapping (postfx_tonemapping.frag), with bloom from a chain of Bloomlevels levels (0: none)
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static glm::vec4 tonemap_params(std::size_t const Bloomlevels);
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// controls of the debug window; Readback: the adapted luminance, the exposure and the average luminance the gpu worked out
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static void draw_debug_ui(float const *Readback);
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};
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} // namespace gfx
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