SiandClaude Opus 5.5
53dca6b4b8
Blur's box blur moves to effects/box_blur.hpp so both share it; Blur renders exactly as before. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
51 lines
2.1 KiB
C++
51 lines
2.1 KiB
C++
#include "effects/blur.hpp"
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#include <algorithm>
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#include <vector>
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#include "effects/box_blur.hpp"
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#include "effects/source_fill.hpp"
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namespace effector {
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const std::vector<ParamSpec>& BlurEffect::params() const {
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static const std::vector<ParamSpec> specs = {
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ParamSpec::makeInt("radius", "Radius", 8, 1, 256,
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"Half width in pixels of the blur window."),
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ParamSpec::makeInt("passes", "Passes", 2, 1, 8,
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"How often the box blur is repeated; more passes look more gaussian."),
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ParamSpec::makeChoice("direction", "Direction", "both", {"both", "horizontal", "vertical"},
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"Axis the blur is applied along."),
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ParamSpec::makeBool("first_source", "Use the first image", false,
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"Always blur the first source instead of picking one at random."),
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};
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return specs;
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}
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Image BlurEffect::render(const std::vector<Image>& sources, int width, int height, Rng& rng,
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const ParamValues& values) const {
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if (width < 1 || height < 1) throw EffectError("Canvas size must be at least 1x1 pixels.");
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const int radius = static_cast<int>(std::max(1L, paramInt(values, "radius", 8)));
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const int passes = static_cast<int>(std::max(1L, paramInt(values, "passes", 2)));
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const std::string direction = paramChoice(values, "direction", "both");
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const bool firstSource = paramBool(values, "first_source", false);
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Image canvas(width, height);
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if (!sources.empty()) {
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// Every random value is drawn here, before any threading, so that a
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// seed always gives the same image.
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const std::size_t index = firstSource ? 0 : rng.below(sources.size() - 1);
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const Image& src = sources[index];
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const int sx = static_cast<int>(rng.inRange(0, std::max(0, src.width() - width)));
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const int sy = static_cast<int>(rng.inRange(0, std::max(0, src.height() - height)));
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fillFromSource(canvas, src, sx, sy);
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}
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boxBlur(canvas, radius, passes, direction);
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return canvas;
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}
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} // namespace effector
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