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[BUG/PRB.] VFP 9.0 FIX - FIX THE LABEL CAPTIONS ARE DISPLAYED WITH SHADOW
January 2024
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CCB
1. BUG:
In vfp9 (and vfp6, vfp7, vfp8), if we set the Label.BackStyle property to 0 (Transparent), sometimes the label captions are displayed with shadow.
The bug only occurs when the Label.BackStyle property is 0 (Transparent), it does not occur when the Label.BackStyle property is 1 (Opaque).
The bug only occurs for some fonts, for example,
Arial, Consolas, Courier New, Impact, Lucida Console, Microsoft Sans Serif, Segoe UI, Symbol, Tahoma, Times New Roman, Simfang, Simhei, Simkai, Msyh,
it does not occur for other fonts, for example,
Courier, Fixedsys, MS Sans Serif, MS Serif, Modern, Roman, Script, Small Fonts, System, Terminal, Simsun.
The bug only occurs when the Label.Anchor property is 0 (Top Left) or the Label.Anchor property includes the following flags:
1 (Top Absolute), 2 (Left Absolute), 16 (Top Relative), 32 (Left Relative).
The bug only occurs when we select the "Turn on ClearType" checkbox in the Windows Control Panel,
it does not occur when we don't select the "Turn on ClearType" checkbox in the Windows Control Panel.
The bug was reported by Ravil.
In vfp9, sometimes the label captions are displayed with shadow, please refer to the picture testlabelbackstyle-vfp9.jpg:
2. CAUSE:
There are some BUGs in the following code.
3. RESOLUTION:
We can write some code to fix the BUG.
Label4d7481 ::
push edi ;0x004d7481 : 57
Label4d7482 ::
mov ebx , dword ptr [ Data9388dc ] ;0x004d7482 : 8b1ddc889300
mov edx , dword ptr [ esp + 080h ] ;0x004d7488 : 8b942480000000
lea edi , dword ptr [ esi + 4 * esi ] ;0x004d748f : 8d3cb6
shl edi , 05h ;0x004d7492 : c1e705
cmp dword ptr [ edi + ebx + 24 ] , edx ;0x004d7495 : 39541f18
mov dword ptr [ esp + 16 ] , edi ;0x004d7499 : 897c2410
jne Label4cce31 ;0x004d749d : 0f858e59ffff
lea eax , dword ptr [ esp + 084h ] ;0x004d74a3 : 8d842484000000
push eax ;0x004d74aa : 50
pushd 02E8h ;0x004d74ab : 68e8020000
mov eax , esi ;0x004d74b0 : 8bc6
call Fun433401 ;0x004d74b2 : e84abff5ff
cmp eax , 0FFFFFFFFh ;0x004d74b7 : 83f8ff
jle Label4cce31 ;0x004d74ba : 0f8e7159ffff
mov edx , dword ptr [ esp + 084h ] ;0x004d74c0 : 8b942484000000
lea ecx , dword ptr [ eax + 4 * eax ] ;0x004d74c7 : 8d0c80
mov eax , dword ptr [edx] ;0x004d74ca : 8b02
mov ecx , dword ptr [ eax + 8 * ecx + 20 ] ;0x004d74cc : 8b4cc814
shr ecx , 0Eh ;0x004d74d0 : c1e90e
not ecx ;0x004d74d3 : f7d1
and ecx , 01h ;0x004d74d5 : 83e101
mov dword ptr [ esp + 100 ] , ecx ;0x004d74d8 : 894c2464
je Label4cce31 ;0x004d74dc : 0f844f59ffff
pushd 0FFFFFFFFh ;0x004d74e2 : 6aff
lea edx , dword ptr [ esp + 104 ] ;0x004d74e4 : 8d542468
push edx ;0x004d74e8 : 52
lea eax , dword ptr [ esp + 28 ] ;0x004d74e9 : 8d44241c
push eax ;0x004d74ed : 50
push ebp ;0x004d74ee : 55
pushd 0FFFFFFFFh ;0x004d74ef : 6aff
pushd 02E7h ;0x004d74f1 : 68e7020000
mov ebx , 04h ;0x004d74f6 : bb04000000
push esi ;0x004d74fb : 56
mov dword ptr [ esp + 080h ] , ebx ;0x004d74fc : 899c2480000000
mov dword ptr [ esp + 48 ] , ebp ;0x004d7503 : 896c2430
call Fun433a39 ;0x004d7507 : e82dc5f5ff
add esp , 01Ch ;0x004d750c : 83c41c
test eax , eax ;0x004d750f : 85c0
je Label4d751d ;0x004d7511 : 740a
cmp dword ptr [ esp + 20 ] , ebp ;0x004d7513 : 396c2414
jne Label46e007 ;0x004d7517 : 0f85ea6af9ff
;
; ------------------------------------------------------------------------
; VFP 9.0 FIX - FIX THE LABEL CAPTIONS ARE DISPLAYED WITH SHADOW
; August 2021
; ------------------------------------------------------------------------
; CCB
;
; If we set the Label.BackStyle property to 0 (Transparent), sometimes the label captions are displayed with shadow.
;
; 2021/8/6, by ccb
;
cmp dword ptr vfpa_sys9064_data,00h
je Label46e2d8
mov ecx , dword ptr [ Data9388dc ]
lea eax , dword ptr [ esi + 4 * esi ]
shl eax , 05h
cmp word ptr [ eax + ecx + 16 ] , 0340h
je Label4d751c
cmp word ptr [ eax + ecx + 16 ] , 0334h
je Label4d751c
cmp word ptr [ eax + ecx + 16 ] , 0335h
je Label4d751c
jmp Label46e2d8
Label4d751c ::
push edi
mov edi , esi
call vfpa_getformvisible
pop edi
cmp eax , 00h
jle Label46e2d8
sub esp , 10h
mov dword ptr [ esp + 04h ] , 04h
mov dword ptr [ esp + 00h ] , 00h
lea edx , dword ptr [ esp + 04h ]
lea eax , dword ptr [ esp + 00h ]
pushd 0FFFFFFFFh ;0x0046e08f : 6aff
push edx ;0x0046e095 : 52
push eax ;0x0046e09a : 50
push 00h ;0x0046e09b : 55
pushd 0FFFFFFFFh ;0x0046e09c : 6aff
pushd 0191h ;0x0046e09e : 68df000000
push esi ;0x0046e0a3 : 56
call Fun433a39 ;0x0046e0a4 : e89059fcff
add esp , 01Ch ;0x0046e0a9 : 83c41c
mov ecx , dword ptr [ esp + 00h ]
add esp , 10h
test eax , eax
je Label46e2d8
test ecx , ecx
je Label46e2d8
sub esp , 10h
mov dword ptr [ esp + 04h ] , 04h
mov dword ptr [ esp + 00h ] , 01h
lea edx , dword ptr [ esp + 04h ]
lea eax , dword ptr [ esp + 00h ]
pushd 0FFFFFFFFh ;0x0046e08f : 6aff
push edx ;0x0046e095 : 52
push eax ;0x0046e09a : 50
push 00h ;0x0046e09b : 55
pushd 0FFFFFFFFh ;0x0046e09c : 6aff
pushd 021h ;0x0046e09e : 68df000000
push esi ;0x0046e0a3 : 56
call Fun433a39 ;0x0046e0a4 : e89059fcff
add esp , 01Ch ;0x0046e0a9 : 83c41c
mov ecx , dword ptr [ esp + 00h ]
add esp , 10h
test eax , eax
je Label46e2d8
test ecx , ecx
jne Label46e2d8
mov dword ptr [ esp + 28 ] , 04h
pushd 0FFFFFFFFh ;0x0046e08f : 6aff
lea edx , dword ptr [ esp + 32 ] ;0x0046e091 : 8d542420
push edx ;0x0046e095 : 52
lea eax , dword ptr [ esp + 116 ] ;0x0046e096 : 8d442474
push eax ;0x0046e09a : 50
push ebp ;0x0046e09b : 55
pushd 0FFFFFFFFh ;0x0046e09c : 6aff
pushd 0DFh ;0x0046e09e : 68df000000
push esi ;0x0046e0a3 : 56
call Fun433a39 ;0x0046e0a4 : e89059fcff
add esp , 01Ch ;0x0046e0a9 : 83c41c
pushd 0FFFFFFFFh ;0x0046e0be : 6aff
lea ecx , dword ptr [ esp + 32 ] ;0x0046e0c0 : 8d4c2420
push ecx ;0x0046e0c4 : 51
lea edx , dword ptr [ esp + 100 ] ;0x0046e0c5 : 8d542464
push edx ;0x0046e0c9 : 52
push ebp ;0x0046e0ca : 55
pushd 0FFFFFFFFh ;0x0046e0cb : 6aff
pushd 0184h ;0x0046e0cd : 6884010000
push esi ;0x0046e0d2 : 56
call Fun433a39 ;0x0046e0d3 : e86159fcff
add esp , 01Ch ;0x0046e0d8 : 83c41c
pushd 0FFFFFFFFh ;0x0046e0ed : 6aff
lea eax , dword ptr [ esp + 32 ] ;0x0046e0ef : 8d442420
push eax ;0x0046e0f3 : 50
lea ecx , dword ptr [ esp + 64 ] ;0x0046e0f4 : 8d4c2440
push ecx ;0x0046e0f8 : 51
push ebp ;0x0046e0f9 : 55
pushd 0FFFFFFFFh ;0x0046e0fa : 6aff
pushd 0196h ;0x0046e0fc : 6896010000
push esi ;0x0046e101 : 56
call Fun433a39 ;0x0046e102 : e83259fcff
add esp , 01Ch ;0x0046e107 : 83c41c
pushd 0FFFFFFFFh ;0x0046e11c : 6aff
lea edx , dword ptr [ esp + 32 ] ;0x0046e11e : 8d542420
push edx ;0x0046e122 : 52
lea eax , dword ptr [ esp + 40 ] ;0x0046e123 : 8d442428
push eax ;0x0046e127 : 50
push ebp ;0x0046e128 : 55
pushd 0FFFFFFFFh ;0x0046e129 : 6aff
pushd 0C4h ;0x0046e12b : 68c4000000
push esi ;0x0046e130 : 56
call Fun433a39 ;0x0046e131 : e80359fcff
add esp , 01Ch ;0x0046e136 : 83c41c
mov dword ptr [ esp + 24 ] , esi
mov dword ptr vfpa_movemethod_inmovemethod,01h
mov edx , dword ptr [ esp + 24 ]
mov ebp , dword ptr [ esp + 108 ]
mov ebx , dword ptr [ esp + 92 ]
mov edi , dword ptr [ esp + 56 ]
mov esi , dword ptr [ esp + 32 ]
push esi ;0x0046e300 : 56
pushd 049h ;0x0046e301 : 6a49
push edi ;0x0046e305 : 57
pushd 049h ;0x0046e306 : 6a49
push ebx ;0x0046e308 : 53
pushd 049h ;0x0046e309 : 6a49
push ebp ;0x0046e30b : 55
pushd 049h ;0x0046e30c : 6a49
pushd 04h ;0x0046e30e : 6a04
pushd 0107h ;0x0046e310 : 6807010000
push edx ;0x0046e315 : 52
call Fun4f088f ;0x0046e316 : e874250800
add esp , 02Ch ;0x0046e31b : 83c42c
mov dword ptr vfpa_movemethod_inmovemethod,00h
jmp Label46e2d8
Label4d751d ::
pushd 01h ;0x004d751d : 6a01
mov ebx , 0Ah ;0x004d751f : bb0a000000
lea eax , dword ptr [ esp + 08Ch ] ;0x004d7524 : 8d84248c000000
call Fun436eea ;0x004d752b : e8baf9f5ff
mov esi , eax ;0x004d7530 : 8bf0
cmp esi , ebp ;0x004d7532 : 3bf5
mov dword ptr [ esp + 24 ] , esi ;0x004d7534 : 89742418
jne Label4d7482 ;0x004d7538 : 0f8544ffffff
pop edi ;0x004d753e : 5f
jmp Label428f4d ;0x004d753f : e9091af5ff
Now in VFP Advanced, the label captions are displayed without shadow, it is normal.
Please refer to the picture testlabelbackstyle-vfpa.jpg:
4. APPLIES TO:
VFP 6.0.8167.0
VFP 6.0.8961.0 (SP5)
VFP 7.0.0.9262
VFP 7.0.0.9465 (SP1)
VFP 8.0.0.2521
VFP 8.0.0.3117 (SP1)
VFP 9.0.0.2412
VFP 9.0.0.3504 (SP1)
VFP 9.0.0.4611 (SP2)
VFP 9.0.0.5015 (SP2)
VFP 9.0.0.5411 (SP2)
VFP 9.0.0.5721 (SP2)
VFP 9.0.0.5815 (SP2)
VFP 9.0.0.6303 (SP2)
VFP 9.0.0.6602 (SP2)
VFP 9.0.0.7423 (SP2)
The bug has been fixed in VFP Advanced.
5. REFERENCE WEBSITES:
1, baiyujia.com:
http://www.baiyujia.com
http://www.baiyujia.com/vfpdocuments/f_vfp9fix184.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix188.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix189.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix190.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix191.asp
2, microsoft.com:
https://social.technet.microsoft.com/Forums/windows/en-US/3d60cb6f-4845-4f52-84cb-b57a67fa6029/captions-of-checkbox-labels-and-optionbuttons-gets-darker
https://devblogs.microsoft.com/oldnewthing/20060614-00/?p=30873
3, foxite.com:
https://www.foxite.com/archives/form-labels-get-increasingly-smudged-0000227347.htm
https://www.foxite.com/archives/bug-with-transparents-labels-0000316393.htm
https://www.foxite.com/archives/strange-repaintrefresh-with-win10-0000477579.htm
4, wikis.com:
https://fox.wikis.com/wc.dll?Wiki~TransparentLabelsBoldedDuringScreenUpdates
6. OTHER:
For reference only, there is no guarantees.
Any questions or suggestions, please send me an email at ccb2000@163.com.
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