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kolibrios/programs/demos/bgitest/trunk/bgifont.inc

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; BGIFONT.INC v1.0 beta
;
; Written in pure assembler by Ivushkin Andrey aka Willow
;
; Created: December 16, 2004
;
; Last changed: February 2, 2005
;
; Compile with FASM
; BGI constants
BGI_NODRAW equ 0x10000
BGI_ITALIC equ 0x20000
BGI_BOLD equ 0x40000
BGI_HALEFT equ 0x0
BGI_HARIGHT equ 0x1000
BGI_HACENTER equ 0x2000
BGI_VABOTTOM equ 0x0
BGI_VATOP equ 0x4000
BGI_VACENTER equ 0x8000
BGI_FREE equ 0x80000000
BGI_HAMASK equ 0x3000
BGI_VAMASK equ 0xc000
; Freetext structure
struc BGIfree FontName,XY,Angle,ScaleX,ScaleY,StrPtr,StrLen,Color,Align
{
dd FontName ;0
dd XY ;4
dd Angle ;8
dd ScaleX ;12
dd ScaleY ;16
dd StrPtr ;20
dd StrLen ;24
dd Color ;28
dd Align ;32
}
; font options structure
struc BGIrec FontName,CharsCount,FirstChar,UpperMargin,LowerMargin,\
Widths,FirstData,EOF,font_data
{
.FontName dd ? ; 0
.CharsCount db ? ; 4
.FirstChar db ? ; 5
.UpperMargin db ? ; 6
.LowerMargin db ? ; 7
.Widths dd ? ; 8
.FirstData dd ? ; 12
.EOF dd ? ; 16
.font_data dd ? ; 20 follows (Offsets)
}
macro BGIfont_GetID
{
call _BGIfont_GetID
}
macro BGIfont_Prepare
{
call _BGIfont_Prepare
}
macro BGIfont_Freetext
{
call _BGIfont_Freetext
}
macro BGIfont_Outtext
{
call _BGIfont_Outtext
}
macro _FI name,_size
{
db name
if BGI_LEVEL eq KERNEL
dw _size
end if
}
BGIfont_names:
_FI 'LCOM',11485 ;7
_FI 'EURO',8117 ;5
_FI 'GOTH',13816 ;6
_FI 'LITT',3596 ;8
_FI 'TRIP',11932 ;14
_FI 'SCRI',8490 ;11
_FI 'SMAL',4162 ;13
_FI 'TSCR',12134 ;15
_FI 'SANS',8453 ;10
_FI 'SIMP',9522 ;12
BGIfont_names_end:
macro BGIfont_Init
{
; in: ecx - number of fonts to load;
; esi-> _FI structure
; edi-> where to load
push edi
if BGI_LEVEL eq KERNEL
mov edi,0x40000
end if
.nfont:
mov edx,[esi]
if BGI_LEVEL eq KERNEL
movzx ebx,word[esi+4]
mov [BGIfont_Prepare.okflag],'N'
end if
call _BGIfont_Prepare
if ~ BGI_LEVEL eq KERNEL
add esi,4
else
push esi
test eax,eax
jz .fail
mov [BGIfont_Prepare.okflag],'*'
.fail:
mov esi,BGIfont_Prepare.font
call boot_log
pop esi
add esi,6
end if
loop .nfont
dph2 _BGI_BOLD,300,550
; movzx edi,byte[0x40000]
pop edi
}
BGIfont_get2head:
shr ecx,28 ; font #
sub ecx,4
jb .exit2 ; invalid #
mov edi,[BGIfont_Ptr]
inc edi
cmp cl,[edi-1]
jae .exit2 ; # too large
jecxz .ex
.fnext:
mov edi,[edi+16]
loop .fnext
jmp .ex
.exit2:
xor edi,edi
.ex:
ret
BGIfont_GetName:
; in: ecx-fontID;
; out: edx-font name.
call BGIfont_get2head
xor edx,edx
test edi,edi
jz .ex
mov edx,[edi]
.ex:
ret
macro dps2 _str
{
if ~ BGI_LEVEL eq KERNEL
if LOAD_MSG eq 1
dps _str
end if
else
pusha
mov esi,BGIfont_Prepare.okflag
mov byte[esi], _str
call boot_log
popa
end if
}
macro dph2 num,x,y
{
if BGI_LEVEL eq KERNEL
pusha
mov eax,0x00080100
mov ebx,num
mov ecx,x shl 16+y
mov edx,0xFF0000
call display_number
popa
end if
}
_BGIfont_GetID:
; in: edx-font name;
; out: eax-fontID, edi->BGIrec
push ecx edi
mov edi,[BGIfont_Ptr]
movzx ecx,byte[edi] ; ecx-font count
mov eax,ecx
inc edi ; edi->FontName
jecxz .ex
.fnext:
cmp edx,[edi]
jne .floop
sub eax,ecx
add eax,4
shl eax,28
jmp .ex
.floop:
mov edi,[edi+16]
loop .fnext
.num0:
xor eax,eax
.ex:
pop edi ecx
ret
_BGIfont_Prepare:
; in: edx-font name, edi->pointer to load fonts (fonts_count)
; out: eax-ID of new font loaded; eax=0 error
cmp [BGIfont_Ptr],0
jne .already
mov [BGIfont_Ptr],edi
.already:
pusha
mov edi,[BGIfont_Ptr]
movzx ecx,byte[edi] ; ecx-font count
mov eax,ecx
inc edi ; edi->FontName
jecxz .fload
.fnext:
cmp edx,[edi]
jne .loop
sub eax,ecx
inc eax
jmp .cr_id
.loop:
mov edi,[edi+16]
loop .fnext
.fload:
mov dword[.font],edx ; filename
mov esi,edi ; esi->FontName
mov [.dest],edi ; ptr to load font
if ~ BGI_LEVEL eq KERNEL
mov [.fsize],1
mov eax,58
mov ebx,.fontinfo
int 0x40
test eax,eax
jnz .fail
dps2 '1'
shr ebx,9
inc ebx
mov [.fsize],ebx
mov ebx,.fontinfo
mov eax,58
int 0x40 ; ebx - file size
else
push edi esi edx
mov eax,.font
xor ebx,ebx
mov esi,12
mov ecx,ebx
mov edx,edi
call fileread
pop edx esi edi
mov ebp,edi
add ebp,ebx
cmp ebp,0x50000
ja .fail
end if
cmp dword[edi],0x08084b50 ; 'PK',8,8
jne .fail
dps2 '2'
inc edi
mov eax,26 ; #EOF
mov ecx,253
cld
repne scasb ; skip Copyright
test ecx,ecx
jz .fail
dps2 '3'
cmp edx,[edi+2] ; FontName
jne .fail
dps2 '4'
movzx ecx,word[edi] ; HeaderSize
sub ebx,ecx ; Filesize-Headersize
movzx eax,word[edi+6] ; FontSize
cmp eax,ebx
jb .fail ; file truncated
add ecx,[.dest]
dps2 '5'
cmp byte[ecx],'+' ; ParPrefix
jne .fail
; font is valid, let's fill parameter table
dps2 '>'
mov [esi],edx ; FontName
mov edx,eax
add eax,ecx
mov [esi+16],eax ; Font EOF
movzx eax,word[ecx+5]
add eax,ecx
mov [esi+12],eax
lea edi,[esi+4] ; edi->CharsCount
lea esi,[ecx+1] ; esi->ParPrefix+1
xor eax,eax
lodsw
stosb ; CharsCount
inc esi
movsb ; FirstChar
add esi,3
lodsw
stosb ; UpperMargin
movsb ; LowerMargin
add esi,5 ; esi->offsets
mov eax,[esi]
push edi ; edi->Widths
; prepare moving data
add edi,12 ; edi->offsets
lea ecx,[edx-16]
rep movsb
pop edi ; edi->Widths
mov [edi+8],esi ; EOF
; mov eax,[edi]
movzx ecx,byte[edi-4] ; CharsCount
lea eax,[edi+12+ecx*2] ; eax->widths
stosd ; edi->FirstData
add eax,ecx
stosd ; edi->EOF
mov eax,[esp] ; eax->fonts_count
inc byte[eax] ; increase font counter
movzx eax,byte[eax]
.cr_id:
add eax,0x3 ; create unique ID
shl eax,28 ; to easy use in color(ecx)
jmp .exit
.fail:
xor eax,eax
.exit:
mov [esp+28],eax
popa
ret
if ~ BGI_LEVEL eq KERNEL
.fontinfo:
dd 0
dd 0
.fsize dd 0
.dest dd 0
dd 0x10000
db BGIFONT_PATH
.font db 'FONT.CHR',0
else
.dest dd 0
.font db 'FONT CHR'
.okflag db ' ',0
end if
BGIfont_Coo:
; y->word[txt.y1], x->word[txt.x1]
fild [txt.y1] ;y
fmul st0,st0; y*y
fild [txt.x1] ;x
fmul st0,st0; x*x
faddp ; x*x+y*y
fsqrt ; sqrt, angle
fild [txt.y1];y
fabs
fild [txt.x1] ; x
fabs
fpatan ; arctg(y/x)
.skip:
cmp [txt.x1],0
jge .xplus
fchs
fadd st0,st3
.xplus:
cmp [txt.y1],0
jge .yplus
fchs
.yplus:
fadd st0,st2
fsincos
fmul st0,st2
fiadd [txt.x0]
fistp [txt.x1] ; x=r*cos a
fmulp ; y=r*sin a,angle
fiadd [txt.y0]
fistp [txt.y1]
ret
_BGIfont_Freetext:
; in: ebx-BGIfree structure
; out: eax-new drawing coords
mov edx,[ebx]
call _BGIfont_GetID
test eax,eax
jnz .fexists
ret
.fexists:
pusha
fninit
fldpi
fld [pi180]
fimul dword[ebx+8]
fst [BGIangle]
mov esi,[ebx+28]
and esi,0xffffff
add esi,eax
mov eax,[ebx+32]
and [deform],0
test eax,BGI_ITALIC
jz .norm
mov [deform],0.4
.norm:
mov ebp,eax
or ebp,BGI_FREE
mov eax,[ebx+12]
mov [Xscale],eax
mov eax,[ebx+16]
mov [Yscale],eax
mov ecx,[ebx+20]
mov edx,ebp
and edx,BGI_FREE+BGI_VAMASK+BGI_HAMASK
add edx,[ebx+24]
mov eax,[ebx+4]
mov ebx,esi
add ebx,0x6000000
mov [esp+4],edx
mov [esp+20],ecx
jmp txt
pi180 dd 0.017453
_BGIfont_Outtext:
; in: ebx-[x][y], ecx-color, edx-string, esi-length
pusha
mov ebp,esi
if ~ BGI_LEVEL eq KERNEL
mov eax,ebx
mov ebx,ecx
mov ecx,edx
mov edx,esi
end if
; in: eax-[x][y], ebx-color, ecx-string, edx-length
txt:
if ~ BGI_LEVEL eq KERNEL
if BGI_WINDOW_CLIP eq 1
pusha
mov eax,9
mov ebx,BGI_PRC_INFO
mov ecx,-1
int 0x40
popa
end if
end if
mov [.y0],ax
shr eax,16
mov [.x0],ax
mov ecx,ebx ; color
and ebx,0xfffffff
mov [.color],ebx
call BGIfont_get2head
test edi,edi
jz .exit
mov ecx,[esp+4]; str length
mov esi,[esp+20]; str ptr
movzx eax,byte[edi+5]
push ecx
and ecx,0xff
jnz .lenok
add esp,4
jmp .ex2
.lenok:
pusha
push dword[txt.y0]
and dword[txt.y0],0
xor edx,edx
mov ebx,[edi+8]
.next:
call txt.BGIfont_GetChar
movzx eax,byte[ebx+eax]
add edx,eax
loop .next
mov ecx,edx ; ecx - x size
movzx dx,byte[edi+6]
mov ebx,[esp+36]
and ebx,BGI_HAMASK
cmp ebx,BGI_HARIGHT
je .nova
ja .subv
xor ecx,ecx
jmp .nova
.subv:
shr cx,1
.nova:
mov ebx,[esp+36]
and ebx,BGI_VAMASK
cmp ebx,BGI_VATOP
je .def
ja .subh
xor edx,edx
jmp .def
.subh:
shr dx,1
.def:
call txt.BGIfont_Deform
pop dword[txt.y0]
popa
pop ebx
mov ax,[txt.y1]
sub [txt.y0],ax
mov ax,[txt.x1]
sub [txt.x0],ax
xor eax,eax
cld
.mloop:
push [.y0]
pop [.y]
push [.x0]
pop [.x]
call .BGIfont_GetChar
push esi
lea esi,[edi+20] ; offset
movzx edx,word[esi+eax*2] ; ofs1
add edx,[edi+12]
inc eax
cmp al,[edi+4]
je .eof
movzx eax,word[esi+eax*2]; ofs2
add eax,[edi+12]
jmp .prc_vec
.eof:
mov eax,[edi+16] ; ofs2=eof
.prc_vec: ; edx-vec cmd ifs, eax-cmd limit
mov [.vec_end],eax
push ecx
.vec_loop:
mov ax,word[edx]
push edx
mov ecx,eax
and eax,0x8080 ; op
and ecx,0x7f ; xx
mov edx,[edx+1]
and edx,0x7f ; yy
cmp edx,63
jbe .positive
sub edx,128 ; yy-=128
.positive:
cmp ecx,63
jbe .positive2
sub ecx,128 ; xx-=128
.positive2:
call .BGIfont_Deform
cmp eax,0x8080
jne .noline
test ebp,BGI_NODRAW
jnz .noline
; draw vector
if ~ BGI_LEVEL eq KERNEL
push eax
mov ebx,dword[.x1]
mov ecx,dword[.y1]
if BGI_WINDOW_CLIP eq 1
movzx eax,[.x]
cmp eax,dword[BGI_PRC_INFO+42]
ja .nobold
movzx eax,[.y]
cmp eax,dword[BGI_PRC_INFO+46]
ja .nobold
xor eax,eax
cmp ax,bx
jg .nobold
cmp ax,cx
jg .nobold
end if
mov edx,[.color]
mov eax,38
int 0x40
test ebp,BGI_BOLD
jz .nobold
test ebp,BGI_FREE
jnz .free5
.free5:
add ebx,1 shl 16+1
int 0x40
.nobold:
pop eax
else
pusha
mov eax,dword[.x1]
mov ebx,dword[.y1]
mov ecx,[.color]
; call syscall_drawline
test dword[esp+8],BGI_BOLD
jz .nobold
add eax,1 shl 16+1
; call syscall_drawline
.nobold:
popa
end if
.noline:
pop edx
test eax,eax
je .eovecs ; op=0
push [.y1]
pop [.y]
push [.x1]
pop [.x]
add edx,2
cmp edx,[.vec_end]
jb .vec_loop
.eovecs:
pop ecx esi
push [.y]
pop [.y0]
push [.x]
pop [.x0]
loop .mloop1
jmp .exit
.mloop1:
jmp .mloop
.exit:
mov eax,dword[.y0]
mov [esp+28],eax
.ex2:
popa
ret
.BGIfont_Deform:
test ebp,BGI_FREE
jnz .free0
movzx ebx,byte[.color+3] ;ebx=scale
imul ecx,ebx
add ecx,2
shr ecx,2
imul edx,ebx
add edx,2
shr edx,2
neg edx
mov [.x1],cx
mov [.y1],dx
jmp .add
.free0:
mov [.x1],cx
mov [.y1],dx
fild [.y1]
fld st0
fmul [Yscale]
fchs
fistp [.y1]
fmul [deform]
fiadd [.x1]
fmul [Xscale]
fistp [.x1]
cmp [BGIangle],0
je .add
call BGIfont_Coo
jmp .eax
.add:
mov cx,[.x0]
add [.x1],cx
mov cx,[.y0]
add [.y1],cx
.eax:
ret
.BGIfont_GetChar:
; in: esi -> string; edi -> BGIrec
; out: esi -> next char; al - char obtained
lodsb ; al - char from str
sub al,[edi+5]
jb .out
cmp al,[edi+4]
jb .in
.out:
xor al,al ; al - 1st symbol available
.in:
ret
.y0 dw ?
.x0 dw ?
.x1 dw ?
.x dw ?
.y1 dw ?
.y dw ?
.color dd ?
.vec_end dd ?
BGIfont_Ptr dd 0
width dd ?
deform dd ?
BGIangle dd ?
Xscale dd ?
Yscale dd ?