wakillon

_GDIPlus_PathGetWorldBounds Question

11 posts in this topic

#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>

Example()

Func Example()
    Local $hGUI, $hGraphic, $hBrush, $hPen, $hPen2, $hPath, $aBounds
    ; Create GUI
    $hGUI = GUICreate("GDI+", 800, 300)
    GUISetState(@SW_SHOW)
    _GDIPlus_Startup()
    $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;Create a graphics object from a window handle
    _GDIPlus_GraphicsSetSmoothingMode($hGraphic, $GDIP_SMOOTHINGMODE_HIGHQUALITY) ;Sets the graphics object rendering quality (antialiasing)
    _GDIPlus_GraphicsClear($hGraphic, 0xFFFFFFFF)
    $hBrush = _GDIPlus_BrushCreateSolid(0x7F8800AA)
    $hPen = _GDIPlus_PenCreate ( 0xFF8800AA, 1 )
    $hPen2 = _GDIPlus_PenCreate ( 0xFFFF0000, 1 )

;~  Local $aPoints = [[4,0],[0,0],[0,99],[99,99],[99,0]]
;~  Local $aPoints = [[4,0],[1,1],[1,2],[2,2],[2,1]]
;~  Local $aPoints = [[4,0],[100,100],[100,209],[209,209],[209,100]]
    Local $aPoints = [[4,0],[101,101],[101,200],[200,200],[200,101]]

    $hPath = _GDIPlus_PathCreate() ;Create new path object
    _GDIPlus_PathAddPolygon($hPath, $aPoints)
    $aBounds = _GDIPlus_PathGetWorldBounds($hPath)
    ConsoleWrite ( '+ $aBounds[x] : ' & $aBounds[0] & ', $aBounds[y] : ' & $aBounds[1] & ', $aBounds[w] : ' & $aBounds[2] & ', $aBounds[h] : ' & $aBounds[3] & @Crlf )
    For $i = 1 To $aPoints[0][0]
        _GDIPlus_GraphicsDrawRect($hGraphic, $aPoints[$i][0] - 2, $aPoints[$i][1] - 2, 4, 4, $hPen2)
    Next
    _GDIPlus_GraphicsFillPath($hGraphic, $hPath, $hBrush) ;Fill path to graphics handle (GUI)
    _GDIPlus_GraphicsDrawPath($hGraphic, $hPath, $hPen) ;Draw path to graphics handle (GUI)

;~  $hRegion = _GDIPlus_RegionCreateFromPath ( $hPath )
;~  $aBounds = _GDIPlus_RegionGetBounds ( $hRegion, $hGraphic )
;~  ConsoleWrite ( '+ $aBounds[x] : ' & $aBounds[0] & ', $aBounds[y] : ' & $aBounds[1] & ', $aBounds[w] : ' & $aBounds[2] & ', $aBounds[h] : ' & $aBounds[3] & @Crlf )

    ; Loop until the user exits.
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE
    ; Clean up resources
    _GDIPlus_PathDispose($hPath)
    _GDIPlus_BrushDispose($hBrush)
    _GDIPlus_PenDispose($hPen)
    _GDIPlus_PenDispose($hPen2)
    _GDIPlus_GraphicsDispose($hGraphic)
    _GDIPlus_Shutdown()
EndFunc   ;==>Example

The width and height return by _GDIPlus_PathGetWorldBounds function seems to be false...

Is it me or something is wrong ?


AutoIt 3.3.14.2 X86 - SciTE 3.6.0WIN 8.1 X64 - Other Example Scripts

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$aPoints = [[4,0],[101,101],[101,200],[200,200],[200,101]]
+ $aBounds[x] : 101, $aBounds[y] : 101, $aBounds[w] : 99, $aBounds[h] : 99

101 + 99 = 200 ?

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@wakillon: what do you expect as the result?


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Her 'sikim hıyar' diyene bir avuç tuz alıp koşma!
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 mikell and UEZ

Local $aPoints = [[4,0],[0,0],[0,99],[99,99],[99,0]] ; Result should be 100 instead of 99
Local $aPoints = [[4,0],[1,1],[1,2],[2,2],[2,1]] ;  ;  Result should be 2 instead of 1
Local $aPoints = [[4,0],[100,100],[100,209],[209,209],[209,100]] ; Result should be 110 instead of 109
Local $aPoints = [[4,0],[101,101],[101,200],[200,200],[200,101]] ; Result should be 100 instead of 99

I can understand it can look confuse, but coordinates are based 0, but not dimensions.

 


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For

Local $aPoints = [[4,0],[100,100],[100,100],[100,100],[100,100]]

w = 0, h = 0

 

Local $aPoints = [[4,0],[100,100],[100,100],[100,100],[100,101]]

w = 0, h = 1

 

Local $aPoints = [[4,0],[100,100],[101,100],[100,100],[100,101]]

w = 1, h = 1

 

Width and height are just added to the coordinate which are zero based.

Local $aPoints = [[4,0],[100,100],[100,100],[100,100],[200,101]]

w = 100, h = 1

 

When w = 0 and h = 0 then nothing will be displayed. To display a something either w or h must be greater than 0.


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The own fart smells best!
Her 'sikim hıyar' diyene bir avuç tuz alıp koşma!
¯\_(ツ)_/¯  ٩(●̮̮̃•̃)۶ ٩(-̮̮̃-̃)۶ૐ

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Are you sure ?

For example 

Local $aPoints = [[4,0],[1,1],[1,2],[2,2],[2,1]]  is a square of 4 pixels (2x2 )

20160421090814hmkpb.jpg 

but result is 1 instead of 2


AutoIt 3.3.14.2 X86 - SciTE 3.6.0WIN 8.1 X64 - Other Example Scripts

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#7 ·  Posted (edited)

No, the width and height is 1 and not 2 as you think. I know what you mean but internally it's not calculated that way.

E.g.

_GDIPlus_PathAddRectangle($hPath, 0, 0, 0, 0), _GDIPlus_PathAddRectangle($hPath, 0, 0, 0, 1), _GDIPlus_PathAddRectangle($hPath, 0, 0, 1, 0) result is always

w = 0, h = 0

whereas _GDIPlus_PathAddRectangle($hPath, 0, 0, 1, 1)

w = 1, h = 1 which are 4 pixels at 0,0.

 

Edited by UEZ

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This is not logic !

When i zoom on the gui, i see well a width and a height of 2

2016042110433166jyn.jpg

What's the interest of this method of calcul ?


AutoIt 3.3.14.2 X86 - SciTE 3.6.0WIN 8.1 X64 - Other Example Scripts

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13 minutes ago, wakillon said:

What's the interest of this method of calcul ?

I don't know ¯\_(ツ)_/¯ - only MS knows...

 


Please don't send me any personal message and ask for support! I will not reply!

Selection of finest graphical examples at Codepen.io

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Her 'sikim hıyar' diyene bir avuç tuz alıp koşma!
¯\_(ツ)_/¯  ٩(●̮̮̃•̃)۶ ٩(-̮̮̃-̃)۶ૐ

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So, in conclusion, you assure that the function works well despite the false result ?

It is incomprehensible ! 


AutoIt 3.3.14.2 X86 - SciTE 3.6.0WIN 8.1 X64 - Other Example Scripts

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Well, I assume the logic how the width and height is calculated is different. Probably the coders smoked some shit before coding that stuff.

You cannot set only one pixel using the draw functions. Width and height is always somehow added to the x,y position.

 


Please don't send me any personal message and ask for support! I will not reply!

Selection of finest graphical examples at Codepen.io

The own fart smells best!
Her 'sikim hıyar' diyene bir avuç tuz alıp koşma!
¯\_(ツ)_/¯  ٩(●̮̮̃•̃)۶ ٩(-̮̮̃-̃)۶ૐ

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