Re: Magma + FreeType font

Hi Hilaire, as a shortcut you can use

MaObjectSerializer testMaterialize: yourFontObject

which will break down the object into buffers with one serializer and reconstitute it with a new serializer.

Explore the original and your reconstituted Font side-by-side, and drill down all the way to see if there are any differences.

- Chris

On Sat, Dec 6, 2008 at 5:42 AM, Hilaire Fernandes hilaire@ofset.org wrote:

I am now using Pharo with FreeType fonts + Magmar41.1.

The font I am using use the LogicalFont class (this is how I declare in my code the TT font I am using).

I have extended LogicalFont to get it persisted:

First with a new way to instantiate it:

LogicalFont class>>familyName: familyName pointSize: pointSize emphasis: code

^ (self familyName: pointSize pointSize: pointSize) emphasis: code; yourself

Then three methods for persistence, I copied the existing TType class persistence methods:

maAsStorageObject "I am about to be written on an object file. Write a reference to a known FontSet in the other system instead." "a path to me" ^ DiskProxy global: #LogicalFont selector: #familyName:pointSize:emphasis: args: { (self familyName). (self pointSize). (self emphasis) }

maUsesStandardStorage

   ^ false

maWantsPreSerialization ^ true

Basically these methods are used when I am persisting in the Magma Database a morph with some text.

Now when I am fetching such Morph from the Magma data base in another image (with the same code extension) I got a Segmentation fault (the trace is included there).

The crash is clearly happening in FreeType code, in the primitive called from FT2Face>setPixelWidth:height:

Probably I got something wrong in my persistence code, I will be more than happy with any kind of tips.

Thanks,

Hilaire

Segmentation fault

2043386704 FT2Face>setPixelWidth:height: 2043386052 FreeTypeFont>getLinearWidthOf: 2043385056 [] in FreeTypeFont>linearWidthOf: 2043384872 FreeTypeCache>atFont:charCode:type:ifAbsentPut: 2043384780 FreeTypeFont>linearWidthOf: 2043384688 FreeTypeFont>widthOf: 2043384596 LogicalFont>widthOf: 2043383952 CharacterScanner>setFont 2043383860 CompositionScanner>setFont 2043383760 CompositionScanner>setStopConditions 2043383656 CompositionScanner>composeFrom:inRectangle:firstLine:leftSide:rightSide: 2043382952 TextComposer>composeEachRectangleIn: 2043382644 TextComposer>composeAllRectangles: 2043382552 TextComposer>composeOneLine 2043382460 TextComposer>composeAllLines 2043382368 TextComposer>composeLinesFrom:to:delta:into:priorLines:atY:textStyle:text:container:wantsColumnBreaks: 2043383184 NewParagraph>composeLinesFrom:to:delta:into:priorLines:atY: 2043382276 NewParagraph>composeAll 2043382184 NewParagraph>compose:style:from:in: 2043382092 TextMorph>paragraph 2043380696 TextMorph>fit 2043373380 TextMorph>extent: 2043373288 Morph>bounds: 2043371348 Morph>layoutInBounds: 2043343140 TableLayout>layoutLeftToRight:in: 2043342184 TableLayout>layout:in: 2043338568 Morph>doLayoutIn: 2043333032 Morph>layoutInBounds: 2043297376 TableLayout>layoutTopToBottom:in: 2043297248 TableLayout>layout:in: 2043297120 Morph>doLayoutIn: 2043296936 [] in Morph>fullBounds 2043296844 BlockContext>on:do: 2043296752 Morph>fullBounds 2043296660 Morph>privateInvalidateMorph: 2043296520 Morph>privateAddMorph:atIndex: 2043296428 Morph>addMorph:inFrontOf: 2043296336 [] in Morph>addMorphInFrontOfLayer: 2043296244 SequenceableCollection>do: 2043296152 Morph>addMorphInFrontOfLayer: 2043296060 PasteUpMorph>addMorphFront: 2043295968 Morph>addMorph: 2043295876 Morph>openInWorld: 2043295784 Morph>openInWorld 2042502832 IFIMatchExoMorph>? 2042166172 UndefinedObject>? 2042162816 Compiler>evaluate:in:to:notifying:ifFail:logged: 2042162484 [] in ParagraphEditor>evaluateSelection 2042162300 BlockContext>on:do: 2042162208 ParagraphEditor>evaluateSelection 2042162116 ParagraphEditor>doIt 2042162392 [] in ParagraphEditor>doIt: 2042162024 Controller>terminateAndInitializeAround: 2042161932 ParagraphEditor>doIt: 2042161684 ParagraphEditor>dispatchOnCharacter:with: 2042161580 TextMorphEditor>dispatchOnCharacter:with: 2042161464 ParagraphEditor>readKeyboard 2042161372 TextMorphEditor>readKeyboard 2042161004 [] in TextMorph>keyStroke: 2042160912 TextMorph>handleInteraction:fromEvent: 2042160820 TextMorphForEditView>handleInteraction:fromEvent: 2042160728 TextMorph>keyStroke: 2042160580 TextMorphForEditView>keyStroke: 2042160488 TextMorph>handleKeystroke: 2042160120 KeyboardEvent>sentTo: 2042160028 Morph>handleEvent: 2042159936 Morph>handleFocusEvent: 2042160212 [] in HandMorph>sendFocusEvent:to:clear: 2042160304 [] in PasteUpMorph>becomeActiveDuring: 2042159844 BlockContext>on:do: 2042159752 PasteUpMorph>becomeActiveDuring: 2042159568 HandMorph>sendFocusEvent:to:clear: 2042159476 HandMorph>sendEvent:focus:clear: 2042159340 HandMorph>sendKeyboardEvent: 2042159248 HandMorph>handleEvent: 2042159028 HandMorph>processEvents 2042159120 [] in WorldState>doOneCycleNowFor: 2042158936 SequenceableCollection>do: 2042158844 WorldState>handsDo: 2042158752 WorldState>doOneCycleNowFor: 2042158660 WorldState>doOneCycleFor: 2042158568 PasteUpMorph>doOneCycle 2030389024 [] in >spawnNewProcess 2030389208 [] in BlockContext>newProcess Abandon

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