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FreeTypeCache.class.st
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FreeTypeCache.class.st
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"
Cache for freetype fonts
"
Class {
#name : 'FreeTypeCache',
#superclass : 'Object',
#instVars : [
'mutex',
'maximumSize',
'used',
'fontTable',
'fifo'
],
#pools : [
'FreeTypeCacheConstants'
],
#classInstVars : [
'current'
],
#category : 'FreeType-Cache',
#package : 'FreeType',
#tag : 'Cache'
}
{ #category : 'cleanup' }
FreeTypeCache class >> cleanUp [
self clearCurrent
]
{ #category : 'system startup' }
FreeTypeCache class >> clearCacheOnShutdown [
"Answer true if the cache should be cleared on image shutdown"
^ true
]
{ #category : 'private - cleaning' }
FreeTypeCache class >> clearCurrent [
<script>
current := nil
]
{ #category : 'accessing' }
FreeTypeCache class >> current [
^ current ifNil: [ current := self new ]
]
{ #category : 'accessing' }
FreeTypeCache class >> defaultMaximumSize [
"Answer the default maximumSize in bytes"
^1024*5000 "5 Megabytes"
]
{ #category : 'class initialization' }
FreeTypeCache class >> initialize [
SessionManager default
registerGuiClassNamed: self name
atPriority: 10
]
{ #category : 'system startup' }
FreeTypeCache class >> shutDown: isImageQuitting [
isImageQuitting ifFalse: [ ^ self ].
(current isNotNil and: [ self clearCacheOnShutdown ])
ifTrue:[
self current removeAll.
current := nil ]
]
{ #category : 'system startup' }
FreeTypeCache class >> startUp: isImageStarting [
isImageStarting ifFalse: [ ^ self ].
self current removeAll.
current := nil
]
{ #category : 'add-remove' }
FreeTypeCache >> atFont: aFreeTypeFont charCode: charCodeInteger type: typeFlag scale: scale [
^ self
atFont: aFreeTypeFont
charCode: charCodeInteger
type: typeFlag
scale: scale
ifAbsentPut: [ self error: 'Not found' ]
]
{ #category : 'add-remove' }
FreeTypeCache >> atFont: aFreeTypeFont charCode: charCodeInteger type: typeFlag scale: scale ifAbsentPut: aBlock [
| charCodeTable typeTable scaleTable entry v vSize |
mutex criticalReleasingOnError: [
charCodeTable := fontTable at: aFreeTypeFont ifAbsentPut:[self dictionaryClass new: 60].
typeTable := charCodeTable at: charCodeInteger ifAbsentPut:[self dictionaryClass new: 10].
scaleTable := typeTable at: typeFlag ifAbsentPut:[self dictionaryClass new: 1].
entry := scaleTable at: scale ifAbsent:[].
entry
ifNotNil:[
fifo moveDown: entry.
^entry object].
v := aBlock value.
vSize := self sizeOf: v.
(maximumSize isNotNil and:[vSize > maximumSize])
ifTrue:[^v].
used := used + vSize.
entry := (self fifoEntryClass new
font: aFreeTypeFont;
charCode: charCodeInteger;
type: typeFlag;
scale: scale;
object: v;
yourself).
scaleTable at: scale put: entry.
fifo addLast: entry.
maximumSize ifNotNil:[self shrinkTo: maximumSize].
^ v ]
]
{ #category : 'add-remove' }
FreeTypeCache >> atFont: aFreeTypeFont charCode: charCodeInteger type: typeFlag scale: scale put: anObject [
| charCodeTable typeTable scaleTable anObjectSize oldEntry oldEntrySize entry |
mutex criticalReleasingOnError: [
anObjectSize := self sizeOf: anObject.
(maximumSize isNotNil and:[anObjectSize > maximumSize])
ifTrue:[^anObject].
(charCodeTable := fontTable at: aFreeTypeFont ifAbsentPut:[self dictionaryClass new: 60])
ifNotNil:[
(typeTable := charCodeTable at: charCodeInteger ifAbsentPut:[self dictionaryClass new: 10])
ifNotNil:[
scaleTable := typeTable at: typeFlag ifAbsentPut:[self dictionaryClass new: 1].
oldEntry := scaleTable at: scale ifAbsent:[].
oldEntrySize := (oldEntry
ifNil:[0]
ifNotNil:[self sizeOf: oldEntry object]).
entry := (self fifoEntryClass new
font: aFreeTypeFont;
charCode: charCodeInteger;
type: typeFlag;
scale: scale;
object: anObject;
yourself).
scaleTable at: scale put: entry]].
used := used + anObjectSize - oldEntrySize.
oldEntry ifNotNil: [fifo remove: oldEntry].
fifo addLast: entry.
maximumSize ifNotNil:[self shrinkTo: maximumSize].
^ anObject ]
]
{ #category : 'public' }
FreeTypeCache >> cacheSize [
^ self maximumSize / 1024
]
{ #category : 'public' }
FreeTypeCache >> cacheSize: anInteger [
self maximumSize: (anInteger * 1024)
]
{ #category : 'private - accessing' }
FreeTypeCache >> dictionaryClass [
^ Dictionary
]
{ #category : 'private - accessing' }
FreeTypeCache >> fifoClass [
^ FreeTypeCacheLinkedList
]
{ #category : 'private - accessing' }
FreeTypeCache >> fifoEntryClass [
^ FreeTypeCacheEntry
]
{ #category : 'initialization' }
FreeTypeCache >> initialize [
super initialize.
mutex := Semaphore forMutualExclusion.
maximumSize := self class defaultMaximumSize.
fontTable := self dictionaryClass new: 100.
used := 0.
fifo := self fifoClass new
]
{ #category : 'public' }
FreeTypeCache >> maximumSize [
^ maximumSize
]
{ #category : 'public' }
FreeTypeCache >> maximumSize: anIntegerOrNil [
maximumSize := anIntegerOrNil.
maximumSize ifNotNil:[
used > maximumSize
ifTrue:["shrink"
self shrinkTo: maximumSize]]
]
{ #category : 'add-remove' }
FreeTypeCache >> removeAll [
fontTable := self dictionaryClass new: 100.
fifo := self fifoClass new.
used := 0
]
{ #category : 'add-remove' }
FreeTypeCache >> removeAllForFont: aFreeTypeFont [
| toRemove |
(fontTable includesKey: aFreeTypeFont) ifFalse: [ ^ self ].
toRemove := IdentitySet new.
fifo do: [ :entry |
entry font = aFreeTypeFont ifTrue: [ toRemove add: entry ] ].
toRemove do: [ :entry |
| d |
fifo remove: entry.
d := ((fontTable at: entry font) at: entry charCode) at: entry type.
d removeKey: entry scale.
used := used - (self sizeOf: entry object) ]
]
{ #category : 'add-remove' }
FreeTypeCache >> removeAllForType: typeFlag [
| toRemove |
toRemove := IdentitySet new.
fifo do: [ :entry |
entry type = typeFlag ifTrue: [ toRemove add: entry ] ].
toRemove do: [ :entry |
| d |
fifo remove: entry.
d := ((fontTable at: entry font) at: entry charCode) at: entry type.
d removeKey: entry scale.
used := used - (self sizeOf: entry object) ]
]
{ #category : 'reporting' }
FreeTypeCache >> reportCacheState [
"Answer a description of the current state of the cache"
| usedPercent |
usedPercent := maximumSize
ifNil: [0]
ifNotNil: [(used * 100 / maximumSize) asFloat rounded].
^ usedPercent asString,'% Full (maximumSize: ', maximumSize asString, ' , used: ', used asString,')'
]
{ #category : 'private - sizing' }
FreeTypeCache >> shrinkTo: newSize [
"if the used size is greater than newSize, then remove all the receiver's entries"
used > newSize ifTrue:[self removeAll]
]
{ #category : 'private - accessing' }
FreeTypeCache >> sizeOf: anObject [
^ anObject ftSize
]