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CairoMorphic.pck.st
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CairoMorphic.pck.st
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'From Cuis 6.0 [latest update: #5067] on 11 February 2022 at 1:30:27 pm'!
'Description An implementation of MorphicCanvas using Cairo FFI.'!
!provides: 'CairoMorphic' 1 93!
!requires: 'Cairo' 1 46 nil!
SystemOrganization addCategory: 'CairoMorphic'!
!classDefinition: #CairoDisplayScreen category: 'CairoMorphic'!
DisplayScreen subclass: #CairoDisplayScreen
instanceVariableNames: 'canvas'
classVariableNames: ''
poolDictionaries: ''
category: 'CairoMorphic'!
!classDefinition: 'CairoDisplayScreen class' category: 'CairoMorphic'!
CairoDisplayScreen class
instanceVariableNames: ''!
!classDefinition: #CairoBoxedMorph category: 'CairoMorphic'!
BoxedMorph subclass: #CairoBoxedMorph
instanceVariableNames: 'rotation'
classVariableNames: ''
poolDictionaries: ''
category: 'CairoMorphic'!
!classDefinition: 'CairoBoxedMorph class' category: 'CairoMorphic'!
CairoBoxedMorph class
instanceVariableNames: ''!
!classDefinition: #CairoMorph category: 'CairoMorphic'!
BoxedMorph subclass: #CairoMorph
instanceVariableNames: 'rotation scale'
classVariableNames: ''
poolDictionaries: ''
category: 'CairoMorphic'!
!classDefinition: 'CairoMorph class' category: 'CairoMorphic'!
CairoMorph class
instanceVariableNames: ''!
!classDefinition: #CairoMorphExample category: 'CairoMorphic'!
CairoMorph subclass: #CairoMorphExample
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'CairoMorphic'!
!classDefinition: 'CairoMorphExample class' category: 'CairoMorphic'!
CairoMorphExample class
instanceVariableNames: ''!
!classDefinition: #CairoCanvas category: 'CairoMorphic'!
BitBltCanvas subclass: #CairoCanvas
instanceVariableNames: 'surface cairo images'
classVariableNames: ''
poolDictionaries: ''
category: 'CairoMorphic'!
!classDefinition: 'CairoCanvas class' category: 'CairoMorphic'!
CairoCanvas class
instanceVariableNames: ''!
!CairoDisplayScreen commentStamp: '<historical>' prior: 0!
Display screen using Cairo FFI.
To install:
CairoDisplayScreen install.!
!CairoMorph commentStamp: '<historical>' prior: 0!
Morph that draws on a CairoCanvas.!
!CairoCanvas commentStamp: '<historical>' prior: 0!
A Canvas that renders with Cairo FFI.
Tests:
CairoCanvas displayWorld.
CairoCanvas displayWorldScaled: 0.8@0.8.
CairoCanvas displayWorldRotated: -10!
!CairoDisplayScreen methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 12:48:41'!
forceToScreen: aRectangle
(BitBlt toForm: self)
copy: aRectangle
from: aRectangle origin in: canvas form.
super forceToScreen: aRectangle.! !
!CairoDisplayScreen methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 18:48:31'!
getCanvas
"Return a Canvas that can be used to draw onto the receiver"
^ canvas! !
!CairoDisplayScreen methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 18:23:12'!
initialize
super initialize.
canvas _ CairoCanvas withExtent: DisplayScreen actualScreenSize! !
!CairoDisplayScreen class methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 18:45:07'!
install
| d |
d _ CairoDisplayScreen new.
d beDisplay.
Smalltalk at: #Display put: d.
DisplayScreen startUp.
Display forceToScreen.! !
!CairoDisplayScreen class methodsFor: 'as yet unclassified' stamp: 'MM 10/13/2019 09:01:12'!
uninstall
| d |
d _ DisplayScreen new.
d beDisplay.
Smalltalk at: #Display put: d.
DisplayScreen startUp.
Display forceToScreen.! !
!CairoBoxedMorph methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 19:13:40'!
clippedSubmorph
^ false! !
!CairoBoxedMorph methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 17:20:44'!
rotatedBy: angle
rotation _ angle! !
!CairoBoxedMorph methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 19:19:41'!
rotation
^ rotation! !
!CairoMorph methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 17:34:36'!
drawMorphOn: aCanvas
! !
!CairoMorph methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 22:13:52'!
drawOn: aCanvas
|cairoCanvas|
cairoCanvas _ CairoCanvas withExtent: self morphExtent.
scale = 1 ifFalse: [
cairoCanvas scale: scale@scale].
self visible ifTrue: [self drawMorphOn: cairoCanvas].
self submorphsDo: [:m |
cairoCanvas fullDraw: m].
aCanvas image: cairoCanvas form at: 0@0.
cairoCanvas release.! !
!CairoMorph methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 18:39:54'!
hasSubmorphs
"We return false here so that we can handle submorphs drawing ourselves, instead of MorphicCanvas>>fullDraw:"
^ false! !
!CairoMorph methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 21:56:28'!
initialize
super initialize.
rotation _ 0.
scale _ 1.! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 19:24:54'!
drawMorphOn: aCanvas
aCanvas fillRectangle: self localBounds color: Color white.
aCanvas cairo setLineWidth: 5;
setSourceColor: Color blue;
curveTo: 300@300 control1: 0@100 control2: 0@200;
stroke. ! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 22:11:31'!
handlesMouseDown: anEvent
^ true! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/18/2019 13:46:48'!
handlesMouseOver: anEvent
^ true! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 21:52:41'!
handlesMouseScroll: anEvent
^ true! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/13/2019 11:16:44'!
initialize
super initialize.
self addMorph: (CairoBoxedMorph new
morphExtent: 50@50;
morphPosition: 50@50;
rotatedBy: -20;
color: Color red;
borderWidth: 5;
borderColor: Color black;
yourself).
self addMorphBack: (CairoBoxedMorph new
morphExtent: 100@100;
morphPosition: 50@50;
rotatedBy: 20;
color: (Color green alpha: 0.5);
borderWidth: 5;
borderColor: Color black;
yourself).
self addMorph: PluggableButtonMorph example position: 200@100.
self morphExtent: 500@500! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 22:12:05'!
mouseButton1Down: aMouseButtonEvent localPosition: localEventPosition
self zoomIn! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 22:12:11'!
mouseButton2Down: aMouseButtonEvent localPosition: localEventPosition
self zoomOut! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/18/2019 13:45:19'!
mouseEnter: anEvent
self activeHand newKeyboardFocus: self.! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/18/2019 13:47:05'!
mouseScroll: aMouseEvent localPosition: localEventPosition
aMouseEvent direction
caseOf: {
[ #up ] -> [ self zoomOut ].
[ #down ] -> [ self zoomIn ].
[ #left ] -> [ self zoomOut ].
[ #right ] -> [ self zoomIn ] }! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 21:59:59'!
zoomIn
scale _ scale + 0.1.
self redrawNeeded! !
!CairoMorphExample methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 22:00:06'!
zoomOut
scale _ scale - 0.1.
self redrawNeeded! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 10/26/2019 11:02:28'!
fillColor: aFillColor do: aBlock
"Prepare parameters for drawing stroke, fill, or both."
cairo setSourceColor: aFillColor.
^ aBlock value
! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 11/2/2019 13:41:49'!
fillPolygon: points color: aColor
cairo newPath;
moveTo: points first.
points allButFirst do: [:aPoint |
cairo lineTo: aPoint].
cairo closePath;
setSourceColor: aColor;
fill.! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 10/26/2019 11:01:57'!
multiCurveTo: coordinatesAreRelative toPoints: toPoints control1Points: control1Points control2Points: control2Points
| c1 c2 to |
coordinatesAreRelative
ifFalse: [
1 to: toPoints size do: [ :i |
to _ toPoints at: i.
c1 _ control1Points at: i.
c2 _ control2Points at: i.
cairo curveTo: to control1: c1 control2: c2 ]]
ifTrue: [
1 to: toPoints size do: [ :i |
to _ toPoints at: i.
c1 _ control1Points at: i.
c2 _ control2Points at: i.
cairo curveTo: to control1: c1 control2: c2 ]].
cairo stroke! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 10/26/2019 11:01:48'!
multiLineTo: coordinatesAreRelative points: toPoints
| to |
coordinatesAreRelative
ifFalse: [
1 to: toPoints size do: [ :i |
to _ toPoints at: i.
cairo lineTo: to ]]
ifTrue: [
1 to: toPoints size do: [ :i |
to _ toPoints at: i.
cairo lineTo: to ]].
cairo stroke! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 10/26/2019 11:02:46'!
multiMoveTo: coordinatesAreRelative points: points
| isFirst |
isFirst _ true.
coordinatesAreRelative
ifFalse: [
points do: [ :p |
isFirst
ifTrue: [ cairo moveTo: p x @ (p y) ]
ifFalse: [ cairo lineTo: p x @ (p y) ].
isFirst _ false ]]
ifTrue: [
points do: [ :p |
isFirst
ifTrue: [ cairo moveTo: p x @ (p y) ]
ifFalse: [ cairo lineTo: p x @ (p y) ].
isFirst _ false ]].
cairo stroke! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 10/26/2019 11:01:39'!
polyLine: points
| p |
p _ points first.
cairo moveTo: p.
2 to: points size do: [ :i |
p _ points at: i.
cairo lineTo: p ].
cairo stroke.! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 10/26/2019 11:00:47'!
strokeWidth: aNumber color: color fillColor: fillColor do: aBlock
color ifNotNil: [cairo setSourceColor: color].
fillColor ifNotNil: [cairo setSourceColor: fillColor].
cairo setLineWidth: aNumber.
^ aBlock value! !
!CairoCanvas methodsFor: 'api' stamp: 'MM 10/20/2019 10:34:57'!
withCairoDo: aBlock
"Give direct access to cairo context"
aBlock value: cairo! !
!CairoCanvas methodsFor: 'accessing' stamp: 'MM 10/8/2019 19:19:07'!
cairo
^ cairo! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/26/2019 10:35:23'!
closePath
cairo closePath! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/31/2019 13:18:21'!
createImageSurface: aForm
|stride externalForm ptr surf |
externalForm := ExternalForm extent: aForm extent depth: 32.
ptr := ExternalAddress gcallocate: (aForm extent x * aForm extent y * 4).
externalForm setManualSurfacePointer: ptr.
(BitBlt toForm: externalForm)
copy: aForm boundingBox
from: 0@0 in: aForm.
stride _ Cairo formatStrideForWidth: Cairo CairoFormatARGB32 width: aForm extent x.
surf _ Cairo imageSurfaceCreateForData: ptr format: Cairo CairoFormatARGB32 width: aForm extent x height: aForm extent y stride: stride.
"We need to keep the externalForm alive. Otherwise the surface gets invalid when the form memory is relased because of gc."
^ CairoSurface new surface: surf; externalForm: externalForm; yourself! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 1/26/2022 17:26:06'!
drawButtonIconFromCurrentMorph
"We assume that we are drawing a PluggableButtonMorph,
or some morph that conforms the required protocol.
Answer true if we were able to draw it."
currentMorph magnifiedIcon ifNotNil: [ :theIcon |
self
image: theIcon
multipliedBy: currentMorph color
at: (currentMorph morphExtent - theIcon extent //2).
^true ].
^false! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 6/14/2020 14:29:28'!
drawString: aString at: aPoint font: fontOrNil color: aColor
|font fw slant fsize str|
font _ fontOrNil ifNil: [FontFamily defaultFamilyAndPointSize].
fw _ font isBold ifTrue: [Cairo CairoFontWeightBold]
ifFalse: [Cairo CairoFontWeightNormal ].
slant _ font isItalic ifTrue: [Cairo CairoFontSlantItalic ]
ifFalse: [Cairo CairoFontSlantNormal ].
fsize _ font lineSpacing - 2. "<-- I'm doing this arbitrarily :( "
cairo setSourceColor: aColor.
cairo selectFontFace: font name
slant: slant
weight: fw.
cairo setFontSize: fsize; moveTo: aPoint x @ (aPoint y + fsize).
"Cairo printDebug: 'TEXT: ', aString."
str _ aString reject: [:aCharacter | {Character newLineCharacter. Character tab} includes: aCharacter].
cairo showText: str.
^ nil! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 21:30:33'!
drawString: aString from: firstIndex to: lastIndex at: aPoint font: fontOrNil color: aColor
^ self drawString: (aString copyFrom: firstIndex to: lastIndex) at: aPoint font: fontOrNil color: aColor! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 18:23:23'!
fillRectangle: aRectangle color: aColor
cairo setSourceColor: aColor;
rectangle: aRectangle;
fill.
! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 18:29:56'!
fillRectangle: aRectangle color: aColor borderWidth: borderWidth borderStyleSymbol: aSymbol baseColorForBorder: baseColorForBorder
cairo setSourceColor: aColor;
rectangle: aRectangle;
fill.
cairo setLineWidth: borderWidth;
setSourceColor: baseColorForBorder;
moveTo: aRectangle origin;
lineTo: aRectangle topRight;
lineTo: aRectangle bottomRight;
lineTo: aRectangle bottomLeft;
lineTo: aRectangle topLeft;
stroke! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 00:44:15'!
frameAndFillRectangle: r fillColor: fillColor borderWidth: borderWidth borderColor: borderColor
self frameRectangle: r borderWidth: borderWidth color: fillColor! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 11:09:27'!
frameRectangle: r borderWidth: borderWidth color: aColor
cairo roundedRectangle: r radius: 5;
setLineWidth: borderWidth;
setSourceColor: aColor;
stroke.! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 11:11:42'!
frameRectangle: r color: aColor borderWidth: borderWidth borderStyleSymbol: aSymbol
"
Display getCanvas fillRectangle: (10@10 extent: 300@200) color: Color white. Display forceToScreen.
Display getCanvas
frameRectangle: (10@10 extent: 300@200)
color: Color green
borderWidth: 10
borderStyleSymbol: #raised.
Display forceToScreen.
"
| displayRectangle bw |
bw _ (currentTransformation externalizeScalar: borderWidth) rounded.
aSymbol == #raised ifTrue: [
displayRectangle _ (currentTransformation externalizeRectangle: r) rounded.
^ self
frameRectangle: displayRectangle
borderWidth: bw
topLeftColor: aColor quiteWhiter
bottomRightColor: aColor quiteBlacker ].
aSymbol == #inset ifTrue: [
displayRectangle _ (currentTransformation externalizeRectangle: r) rounded.
^ self
frameRectangle: displayRectangle
borderWidth: bw
topLeftColor: aColor quiteBlacker
bottomRightColor: aColor quiteWhiter ].
"Unrecognized border style. Draw some border..."
self frameRectangle: r borderWidth: bw color: aColor! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/12/2019 14:10:05'!
image: aForm at: aPoint
|img|
img _ images at: aForm ifAbsent: [|im|
im _ self createImageSurface: aForm.
images at: aForm put: im.
im].
cairo setSourceSurface: img surface at: aPoint.
"cairo setOperator: 5."
cairo paint! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 19:49:41'!
image: aForm multipliedBy: aColor at: aPoint
self image: aForm at: aPoint! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 1/26/2022 17:27:51'!
into: aMorph
super into: aMorph.
cairo save; translate: aMorph morphPosition.
aMorph rotation isZero ifFalse: [
cairo translate: aMorph localBounds center;
rotate: aMorph rotation degreesToRadians;
translate: 0 - aMorph localBounds center].
cairo rectangle: (0@0 extent: aMorph morphExtent) ; clip.
! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 20:57:27'!
isCurrentMorphVisible
^ currentMorph visible! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 21:04:33'!
line: fromPoint to: toPoint width: width color: aColor
cairo setLineWidth: width;
setSourceColor: aColor;
moveTo: fromPoint;
lineTo: toPoint;
stroke.! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 12:48:52'!
outOfMorph
super outOfMorph.
cairo restore.
! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/12/2019 13:58:26'!
release
cairo destroy.
Cairo surfaceDestroy: surface.
images values do: [:img |
img release]! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 18:47:40'!
rotate: angle
cairo rotate: angle degreesToRadians ! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 19:09:55'!
rotatedBy: angle at: aPoint do: aBlock
cairo save;
translate: aPoint;
rotate: angle degreesToRadians;
translate: 0 - aPoint.
aBlock value.
cairo restore.
! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/22/2019 22:26:30'!
roundRect: aRectangle color: aColor radius: radius
cairo setSourceColor: aColor;
roundedRectangle: aRectangle radius: radius ;
fill.! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 22:13:11'!
scale: aPoint
cairo scale: aPoint! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/31/2019 19:12:55'!
spline: fromPoint to: toPoint control1: c1 control2: c2 width: width color: aColor
cairo moveTo: fromPoint;
setSourceColor: aColor;
setLineWidth: width;
curveTo: toPoint control1: c1 control2: c2 ;
stroke! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/9/2019 18:47:23'!
translate: aPoint
cairo translate: aPoint! !
!CairoCanvas methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 11:03:33'!
windowFrame: aRectangle color: aColor radius: r border: bw labelHeight: lh gradientTop: topFactor gradientBottom: bottomFactor insideColor: insideColor
cairo setSourceColor: aColor;
roundedRectangle: aRectangle radius: 10;
fill! !
!CairoCanvas methodsFor: 'initialization' stamp: 'MM 1/26/2022 17:23:32'!
initializeWithTranslation: aPoint
|stride |
super initializeWithTranslation: aPoint.
images _ WeakKeyDictionary new.
stride _ Cairo formatStrideForWidth: Cairo CairoFormatARGB32 width: form extent x.
surface _ Cairo imageSurfaceCreateForData: form pointer getHandle format: Cairo CairoFormatARGB32 width: form extent x height: form extent y stride: stride.
cairo _ CairoContext on: (Cairo create: surface).! !
!CairoCanvas class methodsFor: 'examples' stamp: 'MM 11/2/2019 15:05:31'!
fillPolygonExample
"self fillPolygonExample"
CairoCanvas withExtent: 500@500
draw: [:canvas |
canvas fillRectangle: (0@0 corner: 500@500) color: Color white.
canvas fillPolygon: {100@100. 150@200. 50@200} color: Color red.
canvas fillPolygon: {0@20. 20@0. 40@20. 20@40} color: Color blue ]! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 18:26:36'!
display: aMorph
^ self withExtent: aMorph morphExtent display: aMorph! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 19:23:00'!
displayWorld
Display restoreAfter: [CairoCanvas display: self runningWorld]! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 19:22:03'!
displayWorldRotated: angle
Display restoreAfter: [ |canvas morph|
morph _ self runningWorld.
canvas _ CairoCanvas withExtent: morph morphExtent.
canvas cairo rotate: angle degreesToRadians .
canvas fullDraw: morph.
canvas form displayAt: 0@0]! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 10/8/2019 19:20:27'!
displayWorldScaled: scale
Display restoreAfter: [ |canvas morph|
morph _ self runningWorld.
canvas _ CairoCanvas withExtent: morph morphExtent.
canvas cairo scale: scale.
canvas fullDraw: morph.
canvas form displayAt: 0@0]! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 18:12:51'!
withExtent: extent
^ self withExtent: extent depth: 32! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 19:35:07'!
withExtent: extent depth: depth
|form ptr|
form := ExternalForm extent: extent depth: depth.
ptr := ExternalAddress gcallocate: (extent x * extent y * 4) asInteger.
form setManualSurfacePointer: ptr.
^ self onForm: form! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 10/7/2019 21:01:04'!
withExtent: extent display: aMorph
"For testing purposes"
|canvas|
[canvas _ self withExtent: extent.
canvas fullDraw: aMorph.
canvas form displayAt: 0@0]
ensure: [canvas release]! !
!CairoCanvas class methodsFor: 'as yet unclassified' stamp: 'MM 11/2/2019 13:38:23'!
withExtent: extent draw: aBlock
"For testing purposes"
|canvas|
[canvas _ self withExtent: extent.
aBlock value: canvas.
canvas form displayAt: 0@0]
ensure: [canvas release]! !
!CodeProvider methodsFor: '*CairoMorphic' stamp: 'MM 10/12/2019 14:47:13'!
annotationSeparator
"Answer the separator to be used between annotations"
"cairo_show_text fails with the normal special character used here"
^ '. '! !
!Morph methodsFor: '*CairoMorphic' stamp: 'MM 10/7/2019 21:45:46'!
displayInCairo
CairoCanvas display: self! !
!Morph methodsFor: '*CairoMorphic' stamp: 'MM 10/9/2019 19:16:15'!
rotation
^ 0! !