"

stx:goodies/libcairo - Cairo graphics bindings for Smalltalk/X

Copyright (C) 2008-2019 Jan Vrany

This code is licensed under Creative Commons Attribution-NonCommercial License.

For full text of the license, see file LICENSE.txt

"

"{ Package: 'stx:goodies/libcairo' }"

"{ NameSpace: Cairo }"

CObject subclass:#FontFace

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	category:'Cairo-Objects'

!

!FontFace class methodsFor:'documentation'!

copyright

"

stx:goodies/libcairo - Cairo graphics bindings for Smalltalk/X

Copyright (C) 2008-2019 Jan Vrany

This code is licensed under Creative Commons Attribution-NonCommercial License.

For full text of the license, see file LICENSE.txt

"

! !

!FontFace class methodsFor:'instance creation'!

fromFontDescription: aFontDescription

    Screen current platformName == #X11 ifTrue:[ 

        | pattern |

        pattern := FcPattern fromFontDescription: aFontDescription.

        ^ CPrimitives cairo_ft_font_face_create_for_pattern: pattern.

    ].

    Screen current platformName = 'WIN32' ifTrue:[

        | hfont |

        hfont := aFontDescription fontId.

        hfont isNil ifTrue:[ 

            hfont := Screen current

                                getFontWithFamily:aFontDescription family 

                                face:aFontDescription face 

                                style:aFontDescription style 

                                size:(aFontDescription sizeUnit == #px ifTrue:[aFontDescription pixelSize] ifFalse:[aFontDescription size])  

                                sizeUnit:aFontDescription sizeUnit  

                                encoding:aFontDescription encoding ? '*'.      

            hfont isNil ifTrue:[ 

                self error: 'Faled to get HFONT'.

                ^ nil.

            ].

        ].

        ^ CPrimitives cairo_win32_font_face_create_for_hfont: hfont.

    ].   

    self error: 'Noy yet implemented'.

    "

    Cairo::FontFace fromFontDescription: CodeView defaultFont

    "

    "Created: / 17-02-2016 / 20:01:48 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 19-02-2016 / 21:01:50 / jv"

! !

!FontFace class methodsFor:'accessing'!

dllPath

    OperatingSystem isMSWINDOWSlike ifTrue:[

        ^ #( 'C:\Windows' 'C:\Windows\System32' "Wild guess, should not harm" )

    ].

    OperatingSystem isUNIXlike ifTrue:[

        OperatingSystem getSystemType == #linux ifTrue:[

            | path |

            path := #( '/lib' '/usr/lib' '/usr/local/lib' ).

            (OperatingSystem getSystemInfo at:#machine) = 'x86_64' ifTrue:[

                "If the machine is 64bit, prepend standard path for 32bit libs.

                 Leave standard paths at the end, as the system might be completely 

                 32bit but running on 64bit-capable CPU.

                CAVEAT: This is bit dangerous, as on 64bit OS, if ia32 libs are

                not installed byt 64bit sqlite libs are, then 64bit libs are found

                and when a function is called, segfault will occur!!

                Q: Is there a way how to figure out if the OS itself is 32bit,

                regardles on CPU?"

                path := #( '/lib32' '/usr/lib32' '/usr/local/lib32' ) , path.

            ].

            ^path

        ].

    ].

    self error:'Unsupported operating system'

    "

        SqliteLibrary dllPath

    "

    "Created: / 31-08-2011 / 18:02:17 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

sizeof

    "Returns size of undelaying structure in bytes"

    ^0

! !

!FontFace methodsFor:'accessing'!

referenceCount

    "Return value of reference counter"

    ^ CPrimitives cairo_font_face_get_reference_count: self

    "Modified: / 17-02-2016 / 19:54:07 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified (comment): / 23-02-2016 / 10:49:38 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

status

    "Checks whether an error has previously occurred for this object.

     See Cairo::Status pool for possible values."

    ^ CPrimitives cairo_font_face_status: self

    "Modified: / 23-02-2016 / 10:50:05 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

type

    "This function returns the type of the backend used to create a font face. 

     See FontType for available types."

    ^ CPrimitives cairo_font_face_get_type: self

    "Created: / 17-02-2016 / 19:54:58 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!FontFace methodsFor:'private'!

destroy

    "Tell Cairo library to destroy the corresponding C object.

     Remember that object is physically destroyed only if internal

     refcounter goes to zero. However, after calling destroy,

     this instance should be treated as invalid."

    ^ CPrimitives cairo_font_face_destroy: self

    "Modified: / 17-02-2016 / 19:54:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

reference

    "Increases the reference count on the receiver by one. This prevents the

     receiver from being destroyed until a matching call to #destroy is made.

     This method must be called whenever Cairo documentation says so,

     check comment on return value for methods returning a Cairo object"

    CPrimitives cairo_font_face_reference: self.

    "Modified: / 05-03-2016 / 10:32:04 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!FontFace class methodsFor:'documentation'!

version

    ^'$Id$'

!

version_HG

    ^ '$Changeset: <not expanded> $'

! !