mirror of
https://github.com/JetSetIlly/Gopher2600.git
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5bd9cd1f5a
the rewind system is used to rerun the previous 10 frames thereby creating an image that immediately reflects the selected specification
40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
// This file is part of Gopher2600.
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//
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// Gopher2600 is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Gopher2600 is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Gopher2600. If not, see <https://www.gnu.org/licenses/>.
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package rewind
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import "fmt"
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type PokeHook func(res *State) error
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// RunPoke will the run the VCS from one state to another state applying
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// the supplied PokeHook to the from State
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func (r *Rewind) RunPoke(from *State, to *State, poke PokeHook) error {
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fromIdx := r.findFrameIndex(from.TV.GetCoords().Frame).nearestIdx
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if poke != nil {
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err := poke(r.entries[fromIdx])
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if err != nil {
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return err
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}
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}
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err := r.setSplicePoint(fromIdx, to.TV.GetCoords(), nil)
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if err != nil {
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return fmt.Errorf("rewind: %w", err)
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}
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return nil
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}
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