SiandClaude Opus 5
4739d39a51
Whether an effect works from the loaded photographs is now part of the declarative plug-in contract, next to params(): Effect::needsSources() defaults to true, and blur — which only softens what it is handed — says no and blurs an empty canvas when given nothing. Only the first stage of a cascade ever sees the sources, so chainNeedsSources() just asks the first stage. Both front-ends gate on that instead of on "are there any images": the CLI only refuses an empty batch when the chain wants one, and the interface renders a blur-led chain with no images loaded, saying whichever thing is actually missing. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
26 lines
985 B
C++
26 lines
985 B
C++
#pragma once
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#include "core/effect.hpp"
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namespace effector {
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// Softens its input with a separable box blur, repeated a few times to
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// approximate a gaussian. It needs no source images of its own: given none it
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// blurs an empty canvas, which is what makes it usable as a pure filter stage.
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class BlurEffect : public Effect {
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public:
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std::string name() const override { return "blur"; }
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std::string title() const override { return "Blur"; }
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std::string description() const override {
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return "Softens its input with a repeated box blur, horizontally, vertically or both; "
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"with sources loaded it fills the canvas from a randomly chosen one first.";
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}
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const std::vector<ParamSpec>& params() const override;
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bool needsSources() const override { return false; }
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Image render(const std::vector<Image>& sources, int width, int height, Rng& rng,
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const ParamValues& values) const override;
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};
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} // namespace effector
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