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Better UTF-8 char validation

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git-svn-id: svn://kolibrios.org@5921 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
pathoswithin 2015-11-19 11:48:55 +00:00
parent b4b39d8387
commit 2f44126352
1 changed files with 28 additions and 17 deletions
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45
kernel/trunk/gui/font.inc
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@ -49,7 +49,7 @@ dtext:
shl ebx, 2
add eax, ebx
js .ret
add edi, eax ; linear address (32bit)
add edi, eax
mov eax, ecx
mov ebx, ecx
test ecx, ecx
@ -60,7 +60,7 @@ dtext:
and cl, 7
inc ecx
push ebp ecx esi
mov esi, edx ; -> string
mov esi, edx
or eax, 0xFF000000
bt ebx, 27
jc .bufferReady
@ -80,9 +80,9 @@ dtext:
mov edx, eax
mov eax, [esp+24]
cmp eax, -1
jnz .background
jnz @f
mov [esp+28], edi
.background:
@@:
mov edi, edx
rep stosd
mov edi, edx
@ -100,6 +100,10 @@ dtext:
bt ebx, 28
jc .drawUTF8
; ebp = font color
; esi -> string
; edi -> buffer
; Stack map:
; char counter +0
fontMultiplier = 4
@ -115,8 +119,7 @@ deltaToScreen = 28
.drawUTF16:
dec dword [esp]
js .done
xor ebx, ebx
mov bx, [esi]
movzx ebx, word [esi]
test ebx, ebx
jz .done
inc esi
@ -141,27 +144,33 @@ deltaToScreen = 28
dec dword [esp]
js .done
@@:
xor ebx, ebx
mov bl, [esi]
movzx ebx, byte [esi]
inc esi
test bl, bl
jz .done
jns .valid
shl bx, 10
jnc @b
shr bh, 2
mov bl, [esi]
test bl, bl
jns @b
shl bl, 2
jc @b
shr bh, 2
shr bx, 2
inc esi
cmp bx, 1419
jc .valid
shl bx, 4
@@:
shl bh, 4
jns @f
.tail:
mov bl, [esi]
shl bl, 1
jnc @b
js @b
inc esi
shl bx, 1
jmp @b
shl bh, 1
js .tail
@@:
xor ebx, ebx
.valid:
@ -180,8 +189,7 @@ deltaToScreen = 28
.draw866:
dec dword [esp]
js .done
xor ebx, ebx
mov bl, [esi]
movzx ebx, byte [esi]
test ebx, ebx
jz .done
inc esi
@ -199,8 +207,7 @@ deltaToScreen = 28
.draw866toUni:
dec dword [esp]
js .done
xor eax, eax
mov al, [esi]
movzx eax, byte [esi]
test eax, eax
jz .done
call ansi2uni_char
@ -260,6 +267,10 @@ deltaToScreen = 28
; scaling/smoothing algorithm
drawChar:
; ebp = font color
; esi = font multiplier
; edi -> buffer
; ebx -> char data
mov dl, [ebx]
.raw:
bsf eax, edx