Detect "tofu" in font Code

[Deye]

Hi,

Is there a way to detect glyphs in an ALT code showing only as a plain square tofu
And any input about  _GUIScrollbars_Generate, it seems to completely hang the system when it hangs ( windows 10 )

expandcollapse popup

#include <GUIConstantsEx.au3>
#include "GUIScrollbars_Ex.au3"
#include <Misc.au3>

Local $hDLL = DllOpen("user32.dll")
;~ Local $hGUI = GUICreate("Example", 1000, 500, -1, -1,  $WS_VSCROLL+$WS_SIZEBOX,$ES_AUTOVSCROLL)
Local $hGUI = GUICreate("Example", 1000, 500)
$X = 10
$Y = 1
$max = 1700
Local $aCntrls[$max + 1]
$ChrW = "E6FF"
For $i = 1 To $max
    $ChrW = Hex(Dec($ChrW) + 1, 4)
    $aCntrls[$i] = GUICtrlCreateLabel(ChrW("0x" & $ChrW), $X, $Y, 25, 25, $WS_BORDER)
    GUICtrlSetFont(-1, 13, 500, -1, "Segoe MDL2 Assets")
    GUICtrlCreateLabel($ChrW, $X, $Y + 20, 25, 15, $WS_BORDER)
    GUICtrlSetFont(-1, 6)
    $X += 25
    If $X > 960 Then
        $X = 10
        $Y += 45
    EndIf
Next

_GUIScrollbars_Generate($hGUI, 0, 800)
GUISetState(@SW_SHOW, $hGUI)

While 1
    $msg = GUIGetMsg()
    Switch $msg
        Case $GUI_EVENT_CLOSE
            DllClose($hDLL)
            Exit
        Case $aCntrls[1] To $aCntrls[$max]
            $i = $msg / 2
            $i += (IsInt($i) ? -0.5 : 0)
            GUICtrlSetBkColor($aCntrls[$i], 0X1BDC8)
            Local $aPos = MouseGetPos()
            $hGUItmp = GUICreate('', 60, 50, $aPos[0], $aPos[1], BitOR($WS_POPUP, $WS_DLGFRAME), BitOR($WS_EX_STATICEDGE, $WS_EX_TOOLWINDOW, $WS_EX_TOPMOST))
            GUICtrlCreateLabel(ChrW("0x" & GUICtrlRead($aCntrls[$i] + 1)), 5, 2, 50, 50, -1, $GUI_WS_EX_PARENTDRAG)
            GUICtrlSetFont(-1, 20, "", -1, "Segoe MDL2 Assets")
            GUICtrlCreateLabel("0x" & GUICtrlRead($aCntrls[$i] + 1), -1, 30)
            GUICtrlSetFont(-1, 9)
            GUISetState(@SW_SHOWNA, $hGUItmp)
            While _IsPressed("01", $hDLL)
                Sleep(250)
            WEnd
            Sleep(150)
            GUIDelete($hGUItmp)
            GUICtrlSetBkColor($aCntrls[$i], 0xffffff)
    EndSwitch
WEnd

Thanks 

Deye

Edited February 15, 2019 by Deye

[Deye]

Cultivated the question a bit 

For the heads up: Maybe something can be made with this example : 

Thanks

Deye

[Melba23]

Deye,

I get the scrollbars generated without problem - what do you get?

And the UDF requires "0" as a parameter when not requiring scroll in one axis and not "-1", but it still functions for me even with that mistake.

M23

[Deye]

Hi Melba,

It happens as soon as I press on some label
Not sure what to call it, If its a memory leak and such
If any one else can detect what it is Or confirm the same ..

Thanks
Deye
 

Edited February 15, 2019 by Deye

[Melba23]

Deye,

Nothing untoward happens to the scrollbars for me when I click a label - they just keep on working. The labels take some time to reload - hardly surprising when you have so many.

M23

[Deye]

Melba,

Even if I go as to 10 pixels higher than the the gui the same happens 
As Without _GUIScrollbars it acts very fast (Also, there is no loop that detects the pressed control ..)

Note that if I press a label (say right after a quick scroll) the correct label gets selected  (as it started carrying out whats for it in the while loop ) but then something else starts\still running in the background and interrupts, causing everything to hang ( in many occasions for more than a minute  )

if there where functions to help debug\Avoid  that For instance:

Case $aCntrls[1] To $aCntrls[$max]
$aPos =  _GUIScrollbars_Hold() ; save the position of the scroll bars And Stop all _WM procedures

; DO Stuff 

_GUIScrollbars_UnHold($aPos) ; Restart\Refresh

It would be easier for me to determine anything

Thanks

Deye

[Melba23]

Deye,

I can "quick scroll" and click on any label without any problem. Is this the complete script you are actually running or is there something else that might interfere?

Have you thought of using Opt("TrayIconDebug") to see where the script is hanging? That might offer a clue as to what is happening.

As to writing debugging functions - you can always write your own:

• Use _GUIScrollBars_GetScrollPos($hWnd, $SB_VERT) to get the scrollbar position
• Use the $bRegisterMsg when generating the scrollbars to prevent the UDF from automatically registering the various messages and write your own handlers. which you can toggle as required

M23

[Deye]

Thanks Melba,

The example is as is, all that I'm running along the with the UDF
I'm afraid you are right about how scrollbars are going to behave either ways As you have all the inventory of past experience with the issue ,So I'm not going to even try messing with it anymore 

Now maybe if someone finds a way to remove the tofus showing up this will have a better chance @ being less limited .. 

Thanks as always 
Deye

[Deye]

@ Back to this one.

If the tofu images will always have the same binary string then maybe _GDIPlus_BitmapCreateFromMemory  can work for doing the  binary string comparing 
And so : What can be used to  load\create GDI images for characters, Will I need to Screen Capture each one from a test label Or is there a better yet direct approach for doing this

Thanks
Deye

[Deye]

As for some leading points I had started looking here:

https://devblogs.microsoft.com/oldnewthing/20040716-00/?p=38413

https://chromium.googlesource.com/chromium/src/+/master/ui/gfx/font_fallback_win.cc

derived from:

https://stackoverflow.com/questions/54050095/how-to-tell-if-a-surrogate-pair-unicode-character-is-supported-by-the-font?answertab=votes#tab-top

Then there is this one: https://www.codeproject.com/Articles/18043/Removing-or-replacing-non-printable-Unicode-charac

or  vdmx 'OS/2' tables : ??

https://docs.microsoft.com/en-us/typography/opentype/spec/vdmx

http://www.homer.com.au/webdoc/graphics/ttf/vdmx.htm