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kolibrios/programs/demos/magnify/trunk/magnify.asm
SPraid (simba) f8ca762192 in some programs set not sized changed window
git-svn-id: svn://kolibrios.org@551 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-06-22 20:24:06 +00:00

153 lines
3.9 KiB
NASM

;
; MAGNIFY SCREEN
;
; Compile with FASM for Menuet
;
use32
org 0x0
db 'MENUET01' ; 8 byte id
dd 1 ; header version
dd START ; program start
dd I_END ; program image size
dd 0x1000 ; required amount of memory
dd 0x1000 ; esp
dd 0, 0 ; no parameters, no path
include '..\..\..\macros.inc'
delay equ 20
magnify_width = 40
magnify_height = 30
START: ; start of execution
redraw:
call draw_window
still:
call draw_screen
wtevent:
mov eax, 23 ; wait here for event with timeout
mov ebx, delay
mcall
dec eax
js still
jz redraw
dec eax
jnz button
; key in buffer
mov al, 2
mcall
jmp wtevent
button:
; we have only one button, close
or eax, -1
mcall
; *********************************************
; ******* WINDOW DEFINITIONS AND DRAW ********
; *********************************************
draw_window:
mov eax, 12 ; function 12:tell os about windowdraw
mov ebx, 1 ; 1, start of draw
mcall
mov al, 48 ; function 48 : graphics parameters
mov bl, 4 ; subfunction 4 : get skin height
mcall
; DRAW WINDOW
mov ebx, 100*65536 + 8*magnify_width + 8
lea ecx, [eax + 100*65536 + 8*magnify_height + 3]
mov edx, 0x34000000 ; color of work area RRGGBB
mov edi, labelt ; header
xor eax, eax ; function 0 : define and draw window
mcall
mov al, 12 ; function 12:tell os about windowdraw
mov ebx, 2 ; 2, end of draw
mcall
ret
draw_screen:
draw_magnify:
mov eax, 14
mcall ; get screen size
movzx ecx, ax
inc ecx
mov [size_y], ecx
shr eax, 16
inc eax
mov [size_x], eax
mov eax, 37
xor ebx, ebx
mcall ; get mouse coordinates
mov ecx, eax
shr ecx, 16 ; ecx = x
movzx edx, ax ; edx = y
inc ecx
mov [m_xe], ecx
inc edx
mov [m_ye], edx
sub ecx, magnify_width
sub edx, magnify_height
mov [m_x], ecx
mov [m_y], edx
.loop_y:
.loop_x:
xor eax, eax ; assume black color for invalid pixels
test ecx, ecx
js .nopix
cmp ecx, [size_x]
jge .nopix
test edx, edx
js .nopix
cmp edx, [size_y]
jge .nopix
mov ebx, edx
imul ebx, [size_x]
add ebx, ecx
mov eax, 35
mcall ; read pixel
.nopix:
push ecx edx
sub ecx, [m_x]
sub edx, [m_y]
mov ebx, ecx
shl ebx, 3+16
mov bl, 7
mov ecx, edx
shl ecx, 3+16
mov cl, 7
mov edx, eax
mov eax, 13
mcall
pop edx ecx
inc ecx
cmp ecx, [m_xe]
jnz .loop_x
mov ecx, [m_x]
inc edx
cmp edx, [m_ye]
jnz .loop_y
ret
; DATA AREA
labelt:
db 'MAGNIFIER - MOVE MOUSE POINTER', 0
I_END:
align 4
m_x dd ?
m_y dd ?
m_xe dd ?
m_ye dd ?
size_x dd ?
size_y dd ?