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>
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
#pragma once
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#include <memory>
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#include <stdexcept>
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#include <string>
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#include <vector>
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#include "core/image.hpp"
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#include "core/params.hpp"
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#include "core/rng.hpp"
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namespace effector {
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class EffectError : public std::runtime_error {
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public:
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using std::runtime_error::runtime_error;
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};
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// Base class for every effect. Canvas size and the random source are common to
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// all of them; params() covers only the effect-specific knobs.
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class Effect {
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public:
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virtual ~Effect() = default;
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virtual std::string name() const = 0;
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virtual std::string title() const = 0;
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virtual std::string description() const = 0;
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virtual const std::vector<ParamSpec>& params() const = 0;
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// Whether the effect builds its image out of the loaded source images.
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// Effects that only transform what they are handed (blur) say no, and a
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// chain that starts with one of them needs no sources at all.
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virtual bool needsSources() const { return true; }
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virtual Image render(const std::vector<Image>& sources, int width, int height, Rng& rng,
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const ParamValues& values) const = 0;
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ParamValues defaults() const;
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};
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using EffectPtr = std::shared_ptr<const Effect>;
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} // namespace effector
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