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kolibrios-fun/kernel/trunk/video/vga.inc

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Style corrected for new rules, no semantic changes git-svn-id: svn://kolibrios.org@2288 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-10-14 23:38:50 +02:00
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; VGA.INC ;;
;; ;;
;; 640x480 mode 0x12 VGA functions for MenuetOS ;;
;; ;;
;; Paul Butcher, paul.butcher@asa.co.uk ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
paletteVGA:
;16 colour palette
mov dx, 0x3c8
mov al, 0
out dx, al
mov ecx, 16
mov dx, 0x3c9
xor eax, eax
palvganew:
mov al, 0
test ah, 4
jz palvgalbl1
add al, 31
test ah, 8
jz palvgalbl1
add al, 32
palvgalbl1:
out dx, al; red 0,31 or 63
mov al, 0
test ah, 2
jz palvgalbl2
add al, 31
test ah, 8
jz palvgalbl2
add al, 32
palvgalbl2:
out dx, al; blue 0,31 or 63
mov al, 0
test ah, 1
jz palvgalbl3
add al, 31
test ah, 8
jz palvgalbl3
add al, 32
palvgalbl3:
out dx, al; green 0,31 or 63
add ah, 1
loop palvganew
; mov dx, 3ceh
; mov ax, 0005h
; out dx, ax
ret
palette320x200:
mov edx, 0x3c8
xor eax, eax
out dx, al
mov ecx, 256
mov edx, 0x3c9
xor eax, eax
palnew:
mov al, 0
test ah, 64
jz pallbl1
add al, 21
pallbl1:
test ah, 128
jz pallbl2
add al, 42
pallbl2:
out dx, al
mov al, 0
test ah, 8
jz pallbl3
add al, 8
pallbl3:
test ah, 16
jz pallbl4
add al, 15
pallbl4:
test ah, 32
jz pallbl5
add al, 40
pallbl5:
out dx, al
mov al, 0
test ah, 1
jz pallbl6
add al, 8
pallbl6:
test ah, 2
jz pallbl7
add al, 15
pallbl7:
test ah, 4
jz pallbl8
add al, 40
pallbl8:
out dx, al
add ah, 1
loop palnew
ret
align 4
uglobal
novesachecksum dd 0x0
EGA_counter db 0
VGA_drawing_screen db 0
VGA_8_pixels:
rb 16
temp:
.cx dd 0
endg
align 4
checkVga_N13:
cmp [SCR_MODE], dword 0x13
jne @f
; cnvl:
pushad
cmp [EGA_counter], 1
je novesal
mov ecx, [MOUSE_X]
cmp ecx, [novesachecksum]
jne novesal
popad
@@:
ret
novesal:
mov [novesachecksum], ecx
mov ecx, 0
movzx eax, word [MOUSE_Y]
cmp eax, 100
jge m13l3
mov eax, 100
m13l3:
cmp eax, 480-100
jbe m13l4
mov eax, 480-100
m13l4:
sub eax, 100
imul eax, 640*4
add ecx, eax
movzx eax, word [MOUSE_X]
cmp eax, 160
jge m13l1
mov eax, 160
m13l1:
cmp eax, 640-160
jbe m13l2
mov eax, 640-160
m13l2:
sub eax, 160
shl eax, 2
add ecx, eax
mov esi, [LFBAddress]
add esi, ecx
mov edi, VGABasePtr
mov edx, 200
mov ecx, 320
cld
m13pix:
lodsd
test eax, eax
jz .save_pixel
push eax
mov ebx, eax
and eax, (128+64+32) ; blue
shr eax, 5
and ebx, (128+64+32)*256; green
shr ebx, 8+2
add eax, ebx
pop ebx
and ebx, (128+64)*256*256; red
shr ebx, 8+8
add eax, ebx
.save_pixel:
stosb
loop m13pix
mov ecx, 320
add esi, 4*(640-320)
dec edx
jnz m13pix
mov [EGA_counter], 0
popad
ret
VGA_drawbackground:
; draw all
cmp [SCR_MODE], dword 0x12
jne .end
pushad
mov esi, [LFBAddress]
mov edi, VGABasePtr
mov ebx, 640/32; 640*480/(8*4)
mov edx, 480
@@:
push ebx edx esi edi
shl edx, 9
lea edx, [edx+edx*4]
add esi, edx
shr edx, 5
add edi, edx
call VGA_draw_long_line
pop edi esi edx ebx
dec edx
jnz @r
call VGA_draw_long_line_1
popad
.end:
ret
VGA_draw_long_line:
mov dx, 3ceh
mov ax, 0ff08h
cli
out dx, ax
mov ax, 0005h
out dx, ax
m12pix:
call VGA_draw_32_pixels
dec ebx
jnz m12pix
mov dx, 3c4h
mov ax, 0ff02h
out dx, ax
mov dx, 3ceh
mov ax, 0205h
out dx, ax
mov dx, 3ceh
mov al, 08h
out dx, al
sti
ret
VGA_draw_32_pixels:
xor eax, eax
mov ebp, VGA_8_pixels
mov [ebp], eax
mov [ebp+4], eax
mov [ebp+8], eax
mov [ebp+12], eax
mov ch, 4
.main_loop:
mov cl, 8
.convert_pixels_to_VGA:
lodsd ; eax = 24bit colour
test eax, eax
jz .end
rol eax, 8
mov al, ch
ror eax, 8
mov ch, 1
dec cl
shl ch, cl
cmp al, 85
jbe .p13green
or [ebp], ch
cmp al, 170
jbe .p13green
or [ebp+12], ch
.p13green:
cmp ah, 85
jbe .p13red
or [ebp+4], ch
cmp ah, 170
jbe .p13red
or [ebp+12], ch
.p13red:
shr eax, 8
cmp ah, 85
jbe .p13cont
or [ebp+8], ch
cmp ah, 170
jbe .p13cont
or [ebp+12], ch
.p13cont:
ror eax, 8
mov ch, ah
inc cl
.end:
dec cl
jnz .convert_pixels_to_VGA
inc ebp
dec ch
jnz .main_loop
push esi
sub ebp, 4
mov esi, ebp
mov dx, 3c4h
mov ah, 1h
@@:
mov al, 02h
out dx, ax
xchg ax, bp
lodsd
mov [edi], eax
xchg ax, bp
shl ah, 1
cmp ah, 10h
jnz @r
add edi, 4
pop esi
ret
VGA_putpixel:
; eax = x
; ebx = y
mov ecx, eax
mov eax, [esp+32-8+4] ; color
shl ebx, 9
lea ebx, [ebx+ebx*4] ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> 5
lea edx, [ebx+ecx*4] ; + x*BytesPerPixel (Vesa2.0 32)
mov edi, edx
add edi, [LFBAddress] ; + LFB address
mov [edi], eax ; write to LFB for Vesa2.0
shr edx, 5 ; change BytesPerPixel to 1/8
mov edi, edx
add edi, VGABasePtr ; address of pixel in VGA area
and ecx, 0x07 ; bit no. (modulo 8)
pushfd
; edi = address, eax = 24bit colour, ecx = bit no. (modulo 8)
xor edx, edx
test eax, eax
jz .p13cont
cmp al, 85
jbe .p13green
or dl, 0x01
cmp al, 170
jbe .p13green
or dl, 0x08
.p13green:
cmp ah, 85
jbe .p13red
or dl, 0x02
cmp ah, 170
jbe .p13red
or dl, 0x08
.p13red:
shr eax, 8
cmp ah, 85
jbe .p13cont
or dl, 0x04
cmp ah, 170
jbe .p13cont
or dl, 0x08
.p13cont:
ror edx, 8
inc cl
xor eax, eax
inc ah
shr ax, cl
mov dx, 3cfh
cli
out dx, al
mov al, [edi] ; dummy read
rol edx, 8
mov [edi], dl
popfd
;.end:
ret
VGA__putimage:
; ecx = size [x|y]
; edx = coordinates [x|y]
cmp [SCR_MODE], dword 0x12
jne @f
pushad
rol edx, 16
movzx eax, dx
rol edx, 16
movzx ebx, dx
movzx edx, cx
rol ecx, 16
movzx ecx, cx
call VGA_draw_bar_1
popad
@@:
ret
VGA_draw_bar:
; eax cx
; ebx cy
; ecx xe
; edx ye
cmp [SCR_MODE], dword 0x12
jne @f
pushad
sub ecx, eax
sub edx, ebx
and eax, 0xffff
and ebx, 0xffff
and ecx, 0xffff
and edx, 0xffff
call VGA_draw_bar_1
popad
@@:
ret
VGA_draw_bar_1:
mov [temp.cx], eax
mov eax, [TASK_BASE]
add ebx, [eax-twdw + 4]
mov eax, [eax-twdw + 0]
add eax, [temp.cx]
and eax, 0xfff8
shl ebx, 9
lea ebx, [ebx+ebx*4]; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> 5
lea ebx, [ebx+eax*4] ; + x*BytesPerPixel (Vesa2.0 32)
mov esi, ebx
add esi, [LFBAddress] ; + LFB address
shr ebx, 5 ; change BytesPerPixel to 1/8
mov edi, ebx
add edi, VGABasePtr ; address of pixel in VGA area
mov ebx, ecx
shr ebx, 5
inc ebx
.main_loop:
call VGA_draw_long_line_1
dec edx
jnz .main_loop
call VGA_draw_long_line_1
ret
VGA_draw_long_line_1:
push ebx edx esi edi
shl edx, 9
lea edx, [edx+edx*4]
add esi, edx
shr edx, 5
add edi, edx
call VGA_draw_long_line
pop edi esi edx ebx
ret
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