179 lines
2.7 KiB
NASM
179 lines
2.7 KiB
NASM
; Originally written by Jarek Pelczar
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include "lang.inc"
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include "macros.inc"
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WND_SIZE_X = 320
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WND_SIZE_Y = 200
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MEOS_APP_START
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CODE
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fninit
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mov al,40
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mov bl,101b
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int 0x40
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call init_palette
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call init_texture
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jmp .paint_window
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.event_loop:
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mov al,23
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mov ebx,1
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int 0x40
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test eax,eax
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je .draw_screen
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dec eax
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je .paint_window
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or eax,-1
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int 0x40
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.draw_screen:
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call blit_8_to_32
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mov al,7
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mov ebx,virtual_screen_32
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mov ecx,(WND_SIZE_X shl 16)+WND_SIZE_Y
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xor edx,edx
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int 0x40
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call rotate_pal
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jmp .event_loop
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.paint_window:
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mov al,12
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push eax
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xor ebx,ebx
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inc ebx
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int 0x40
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xor eax,eax
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mov ebx,(100 shl 16)+(WND_SIZE_X+8)
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mov ecx,(100 shl 16)+(WND_SIZE_Y+25)
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mov edx,0x33000000
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mov edi,header
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int 0x40
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mov al,7
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mov ebx,virtual_screen_32
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mov ecx,(WND_SIZE_X shl 16)+WND_SIZE_Y
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xor edx,edx
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int 0x40
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pop eax
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and ebx,2 ; bit 1 is set
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int 0x40
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jmp .event_loop
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init_palette:
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mov edi,_palette
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mov ecx,64
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xor eax,eax
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.color1:
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inc ah
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mov al,ah
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stosb
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xor al,al
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stosb
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stosb
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inc edi
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loop .color1
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mov ecx,64
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push ecx
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xor eax,eax
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.color2:
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mov al,63
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stosb
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mov al,ah
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stosb
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xor al,al
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stosb
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inc ah
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inc edi
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loop .color2
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pop ecx
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push ecx
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xor eax,eax
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.color3:
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mov al,63
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stosb
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stosb
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mov al,ah
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stosb
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inc ah
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inc edi
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loop .color3
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pop ecx
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mov eax,0x003f3f3f
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rep stosd
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ret
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init_texture:
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fldpi
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mov [_fpom16],180
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fidiv [_fpom16]
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fstp [_st_rad]
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mov edi,virtual_screen_8
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cdq
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.itex_vertical:
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xor ecx,ecx
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fld [_st_rad]
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mov [_fpom16],5
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fimul [_fpom16]
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mov [_fpom16],dx
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fimul [_fpom16]
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fsin
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fmul [_multiplier]
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fstp [_fpom32]
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.itex_horizontal:
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fld [_st_rad]
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mov [_fpom16],3
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fimul [_fpom16]
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mov [_fpom16],cx
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fimul [_fpom16]
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fsin
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fmul [_multiplier]
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fadd [_fpom32]
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mov [_fpom16],127
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fiadd [_fpom16]
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fistp [_fpom16]
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mov ax,[_fpom16]
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inc eax
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stosb
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inc ecx
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cmp ecx,WND_SIZE_X
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jne .itex_horizontal
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inc edx
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cmp edx,WND_SIZE_Y
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jne .itex_vertical
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ret
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rotate_pal:
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mov ebx,[_palette+4]
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mov edi,_palette+4
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mov esi,_palette+8
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xor ecx,ecx
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mov cl,255
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; cld
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rep movsd
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mov [_palette+1020],ebx
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ret
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include "graph8.inc"
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DATA
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_multiplier dd 63.5
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header db 'Plasma',0
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UDATA
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_fpom32 rd 1
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_fpom16 rw 1
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_st_rad rd 1
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_palette: rd 256
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virtual_screen_8:
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rb WND_SIZE_X*WND_SIZE_Y
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virtual_screen_32:
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rb WND_SIZE_X*WND_SIZE_Y*3
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MEOS_APP_END
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