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revision_preferences.go
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/
revision_preferences.go
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// This file is part of Gopher2600.
//
// Gopher2600 is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Gopher2600 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Gopher2600. If not, see <https://www.gnu.org/licenses/>.
package preferences
import (
"fmt"
"sync/atomic"
"github.com/jetsetilly/gopher2600/prefs"
"github.com/jetsetilly/gopher2600/resources"
)
// LiveRevisionPrefrences encapsulates the current (live) revision values.
//
// For performance critical situations these values should be preferred to the
// prefs.Bool values in RevisionPreferences.
type LiveRevisionPreferences struct {
// The names of the preference fields match the Bug enumerations. These
// values are updated automatically when the corresponding Dsk* field is
// updated.
LateVDELGRP0 atomic.Value // bool
LateVDELGRP1 atomic.Value // bool
LateRESPx atomic.Value // bool
EarlyScancounter atomic.Value // bool
LatePFx atomic.Value // bool
LateCOLUPF atomic.Value // bool
LostMOTCK atomic.Value // bool
RESPxHBLANK atomic.Value // bool
}
// RevisionPreferences defines the details of the TIA revisins.
type RevisionPreferences struct {
dsk *prefs.Disk
// Prefer live values in performance critical code
Live LiveRevisionPreferences
// Disk copies of preferences
LateVDELGRP0 prefs.Bool
LateVDELGRP1 prefs.Bool
LateRESPx prefs.Bool
EarlyScancounter prefs.Bool
LatePFx prefs.Bool
LateCOLUPF prefs.Bool
LostMOTCK prefs.Bool
RESPxHBLANK prefs.Bool
}
func newRevisionPreferences() (*RevisionPreferences, error) {
p := &RevisionPreferences{}
// register callbacks to update the "live" values from the disk value
p.LateVDELGRP0.SetHookPost(func(v prefs.Value) error {
p.Live.LateVDELGRP0.Store(v.(bool))
return nil
})
p.LateVDELGRP1.SetHookPost(func(v prefs.Value) error {
p.Live.LateVDELGRP1.Store(v.(bool))
return nil
})
p.LateRESPx.SetHookPost(func(v prefs.Value) error {
p.Live.LateRESPx.Store(v.(bool))
return nil
})
p.EarlyScancounter.SetHookPost(func(v prefs.Value) error {
p.Live.EarlyScancounter.Store(v.(bool))
return nil
})
p.LatePFx.SetHookPost(func(v prefs.Value) error {
p.Live.LatePFx.Store(v.(bool))
return nil
})
p.LateCOLUPF.SetHookPost(func(v prefs.Value) error {
p.Live.LateCOLUPF.Store(v.(bool))
return nil
})
p.LostMOTCK.SetHookPost(func(v prefs.Value) error {
p.Live.LostMOTCK.Store(v.(bool))
return nil
})
p.RESPxHBLANK.SetHookPost(func(v prefs.Value) error {
p.Live.RESPxHBLANK.Store(v.(bool))
return nil
})
p.SetDefaults()
pth, err := resources.JoinPath(prefs.DefaultPrefsFile)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
p.dsk, err = prefs.NewDisk(pth)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.grp0.latevdel", &p.LateVDELGRP0)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.grp1.latevdel", &p.LateVDELGRP1)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.hmove.laterespx", &p.LateRESPx)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.hmove.earlyscancounter", &p.EarlyScancounter)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.playfield.latepfx", &p.LatePFx)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.playfield.latecolupf", &p.LateCOLUPF)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.lostmotck", &p.LostMOTCK)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Add("tia.revision.respx.hmovethreshold", &p.RESPxHBLANK)
if err != nil {
return nil, fmt.Errorf("revision: %w", err)
}
err = p.dsk.Load(true)
if err != nil {
return nil, err
}
return p, nil
}
// SetDefaults reverts all settings to default values.
func (p *RevisionPreferences) SetDefaults() {
p.LateVDELGRP0.Set(false)
p.LateVDELGRP1.Set(false)
p.LateRESPx.Set(false)
p.EarlyScancounter.Set(false)
p.LatePFx.Set(false)
p.LateCOLUPF.Set(false)
p.LostMOTCK.Set(false)
p.RESPxHBLANK.Set(false)
}
// Load revision preferences from disk.
func (p *RevisionPreferences) Load() error {
return p.dsk.Load(false)
}
// Save current revision preferences to disk.
func (p *RevisionPreferences) Save() error {
return p.dsk.Save()
}