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UnicodePlugin.class.st
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UnicodePlugin.class.st
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"
This plugin measures and renders Unicode (UTF8) strings.
"
Class {
#name : #UnicodePlugin,
#superclass : #InterpreterPlugin,
#category : #'VMMaker-Plugins'
}
{ #category : #translation }
UnicodePlugin class >> hasHeaderFile [
^true
]
{ #category : #utility }
UnicodePlugin >> asCString: stringOop [
"Return a C char * pointer into the given Squeak string object."
"Warning: A Squeak string is not necessarily null-terminated."
"Warning: the resulting pointer may become invalid after the next garbage collection and should only be using during the current primitive call."
<returnTypeC: #'char *'>
interpreterProxy success: (interpreterProxy isBytes: stringOop).
^interpreterProxy failed
ifTrue: [0]
ifFalse: [self cCoerce: (interpreterProxy firstIndexableField: stringOop) to: #'char *']
]
{ #category : #utility }
UnicodePlugin >> cWordsPtr: oop minSize: minSize [
"Return a C pointer to the first indexable field of oop, which must be a words object of at least the given size."
"Warning: the resulting pointer may become invalid after the next garbage collection and should only be using during the current primitive call."
<returnTypeC: #'void *'>
interpreterProxy success:
((interpreterProxy isWords: oop)
and: [(interpreterProxy stSizeOf: oop) >= minSize]).
^interpreterProxy failed
ifTrue: [0]
ifFalse: [self cCoerce: (interpreterProxy firstIndexableField: oop) to: #'void *']
]
{ #category : #utility }
UnicodePlugin >> copyString: stringOop into: stringPtr max: maxChars [
"Copy the Squeak string into a temporary buffer and add a terminating null byte. Fail if there is not sufficent space in the buffer."
| srcPtr count |
<inline: false>
<var: 'stringPtr' type: #'char *'>
<var: 'srcPtr' type: #'char *'>
((interpreterProxy isBytes: stringOop)
and: [(count := interpreterProxy stSizeOf: stringOop) < maxChars]) ifFalse:
[interpreterProxy success: false.
^ 0].
srcPtr := self cCoerce: (interpreterProxy firstIndexableField: stringOop) to: #'char *'.
1 to: count do: [:i | self cCode: '*stringPtr++ = *srcPtr++'].
self cCode: '*stringPtr = 0'.
^ 0
]
{ #category : #primitives }
UnicodePlugin >> primitiveClipboardGet [
"Read the clipboard into the given UTF16 string.."
| utf16Oop utf16 utf16Length count |
<export: true>
<var: 'utf16' type: #'unsigned short *'>
utf16Oop := interpreterProxy stackValue: 0.
interpreterProxy success: (interpreterProxy isWords: utf16Oop).
interpreterProxy failed ifTrue: [^ 0].
utf16 := self cCoerce: (interpreterProxy firstIndexableField: utf16Oop) to: #'unsigned short *'.
utf16Length := 2 * (interpreterProxy stSizeOf: utf16Oop).
count := self unicodeClipboard: utf16 Get: utf16Length.
^interpreterProxy methodReturnInteger: count
]
{ #category : #primitives }
UnicodePlugin >> primitiveClipboardPut [
"Set the clipboard to a UTF16 string.."
| strOop count utf16 utf16Length |
<export: true>
<var: 'utf16' type: #'unsigned short *'>
strOop := interpreterProxy stackValue: 1.
count := interpreterProxy stackIntegerValue: 0.
interpreterProxy success: (interpreterProxy isWords: strOop).
interpreterProxy failed ifTrue: [^ 0].
utf16 := self cCoerce: (interpreterProxy firstIndexableField: strOop) to: #'unsigned short *'.
utf16Length := 2 * (interpreterProxy stSizeOf: strOop).
(count >= 0 and: [ (count < utf16Length) ]) ifTrue: [utf16Length := count].
self unicodeClipboard: utf16 Put: utf16Length.
interpreterProxy pop: 2. "pop args, leave rcvr on stack"
^ 0
]
{ #category : #primitives }
UnicodePlugin >> primitiveClipboardSize [
<export: true>
^interpreterProxy methodReturnInteger: self unicodeClipboardSize
]
{ #category : #primitives }
UnicodePlugin >> primitiveDrawString [
| utf8Oop utf8 w h bitmapOop bitmapPtr utf8Length result |
<export: true>
<var: 'utf8' declareC: 'char *utf8'>
<var: 'bitmapPtr' declareC: 'void *bitmapPtr'>
utf8Oop := interpreterProxy stackValue: 3.
utf8 := self asCString: utf8Oop.
w := interpreterProxy stackIntegerValue: 2.
h := interpreterProxy stackIntegerValue: 1.
bitmapOop := interpreterProxy stackValue: 0.
bitmapPtr := self cWordsPtr: bitmapOop minSize: w * h.
interpreterProxy failed ifTrue: [^ nil].
utf8Length := interpreterProxy stSizeOf: utf8Oop.
self cCode: 'unicodeDrawString(utf8, utf8Length, &w, &h, bitmapPtr)'.
result := interpreterProxy makePointwithxValue: w yValue: h.
interpreterProxy pop: 5 thenPush: result.
^ 0
]
{ #category : #primitives }
UnicodePlugin >> primitiveGetFontList [
| strOop str strLength |
<export: true>
<var: 'str' declareC: 'char *str'>
strOop := interpreterProxy stackValue: 0.
str := self asCString: strOop.
interpreterProxy failed ifFalse:
[strLength := interpreterProxy stSizeOf: strOop.
interpreterProxy methodReturnInteger: (self unicodeGetFont: str List: strLength)]
]
{ #category : #primitives }
UnicodePlugin >> primitiveGetXRanges [
| utf8Oop utf8 resultOop resultPtr utf8Length count resultLength |
<export: true>
<var: 'utf8' declareC: 'char *utf8'>
<var: 'resultPtr' declareC: 'int *resultPtr'>
utf8Oop := interpreterProxy stackValue: 1.
utf8 := self asCString: utf8Oop.
resultOop := interpreterProxy stackValue: 0.
resultPtr := self cWordsPtr: resultOop minSize: 0.
interpreterProxy failed ifTrue: [^ nil].
utf8Length := interpreterProxy stSizeOf: utf8Oop.
resultLength := interpreterProxy stSizeOf: resultOop.
count := self unicode: utf8 Get: utf8Length X: resultPtr Ranges: resultLength.
^interpreterProxy methodReturnInteger: count
]
{ #category : #primitives }
UnicodePlugin >> primitiveMeasureString [
| utf8Oop utf8 utf8Length w h result |
<export: true>
<var: 'utf8' declareC: 'char *utf8'>
utf8Oop := interpreterProxy stackValue: 0.
utf8 := self asCString: utf8Oop.
interpreterProxy failed ifTrue: [^ nil].
w := h := 0.
utf8Length := interpreterProxy stSizeOf: utf8Oop.
self cCode: 'unicodeMeasureString(utf8, utf8Length, &w, &h)'.
result := interpreterProxy makePointwithxValue: w yValue: h.
interpreterProxy pop: 2 thenPush: result.
^ 0
]
{ #category : #primitives }
UnicodePlugin >> primitiveSetColors [
| fgRed fgGreen fgBlue bgRed bgGreen bgBlue mapBGToTransparent |
<export: true>
fgRed := interpreterProxy stackIntegerValue: 6.
fgGreen := interpreterProxy stackIntegerValue: 5.
fgBlue := interpreterProxy stackIntegerValue: 4.
bgRed := interpreterProxy stackIntegerValue: 3.
bgGreen := interpreterProxy stackIntegerValue: 2.
bgBlue := interpreterProxy stackIntegerValue: 1.
mapBGToTransparent := interpreterProxy booleanValueOf: (interpreterProxy stackValue: 0).
interpreterProxy failed ifTrue: [^ nil].
self cCode: 'unicodeSetColors(fgRed, fgGreen, fgBlue, bgRed, bgGreen, bgBlue, mapBGToTransparent)'.
interpreterProxy pop: 7.
^ 0
]
{ #category : #primitives }
UnicodePlugin >> primitiveSetFont [
| fontName fontSize boldFlag italicFlag antiAliasFlag |
<export: true>
<var: 'fontName' declareC: 'char fontName[200]'>
self copyString: (interpreterProxy stackValue: 4) into: fontName max: 200.
fontSize := interpreterProxy stackIntegerValue: 3.
boldFlag := interpreterProxy booleanValueOf: (interpreterProxy stackValue: 2).
italicFlag := interpreterProxy booleanValueOf: (interpreterProxy stackValue: 1).
antiAliasFlag := interpreterProxy booleanValueOf: (interpreterProxy stackValue: 0).
interpreterProxy failed ifTrue: [^ nil].
self cCode: 'unicodeSetFont(fontName, fontSize, boldFlag, italicFlag, antiAliasFlag)'.
interpreterProxy pop: 5.
^ 0
]