struct BLITTER_BLOCK
xmin dd ?
ymin dd ?
xmax dd ?
ymax dd ?
ends
struct BLITTER
dc BLITTER_BLOCK
sc BLITTER_BLOCK
dst_x dd ? ; 32
dst_y dd ? ; 36
src_x dd ? ; 40
src_y dd ? ; 44
w dd ? ; 48
h dd ? ; 52
bitmap dd ? ; 56
stride dd ? ; 60
ends
align 4
__L1OutCode:
push ebx
mov ebx, 8
cmp edx, [eax]
jl .L2
xor ebx, ebx
cmp edx, [eax+8]
setg bl
sal ebx, 2
.L2:
cmp ecx, [eax+4]
jge .L3
or ebx, 1
jmp .L4
.L3:
cmp ecx, [eax+12]
jle .L4
or ebx, 2
.L4:
mov eax, ebx
pop ebx
ret
align 4
block_clip:
push ebp
push edi
push esi
push ebx
sub esp, 4
mov ebx, eax
mov [esp], edx
mov ebp, ecx
mov ecx, [ecx]
mov edx, [edx]
call __L1OutCode
mov esi, eax
mov edx, [esp+28]
mov ecx, [edx]
.L21:
mov eax, [esp+24]
mov edx, [eax]
mov eax, ebx
call __L1OutCode
mov edi, eax
.L20:
mov eax, edi
and eax, esi
jne .L9
cmp esi, edi
je .L9
test esi, esi
jne .L10
test edi, 1
je .L11
mov eax, [ebx+4]
jmp .L25
.L11:
test edi, 2
je .L13
mov eax, [ebx+12]
.L25:
mov edx, [esp+28]
jmp .L22
.L13:
test edi, 4
je .L14
mov eax, [ebx+8]
jmp .L26
.L14:
and edi, 8
je .L12
mov eax, [ebx]
.L26:
mov edx, [esp+24]
.L22:
mov [edx], eax
.L12:
mov eax, [esp+28]
mov ecx, [eax]
jmp .L21
.L10:
test esi, 1
je .L16
mov eax, [ebx+4]
jmp .L23
.L16:
test esi, 2
je .L18
mov eax, [ebx+12]
.L23:
mov [ebp+0], eax
jmp .L17
.L18:
test esi, 4
je .L19
mov eax, [ebx+8]
jmp .L24
.L19:
and esi, 8
je .L17
mov eax, [ebx]
.L24:
mov edx, [esp]
mov [edx], eax
.L17:
mov ecx, [ebp+0]
mov eax, [esp]
mov edx, [eax]
mov eax, ebx
call __L1OutCode
mov esi, eax
jmp .L20
.L9:
add esp, 4
pop ebx
pop esi
pop edi
pop ebp
ret
align 4
blit_clip:
.sx0 equ 36
.sy0 equ 32
.sx1 equ 28
.sy1 equ 24
.dx0 equ 20
.dy0 equ 16
.dx1 equ 12
.dy1 equ 8
push edi
push esi
push ebx
sub esp, 40
mov ebx, ecx
mov edx, [ecx+BLITTER.src_x]
mov [esp+.sx0], edx
mov eax, [ecx+BLITTER.src_y]
mov [esp+.sy0], eax
add edx, [ecx+BLITTER.w]
dec edx
mov [esp+.sx1], edx
add eax, [ecx+BLITTER.h]
dec eax
mov [esp+.sy1], eax
lea ecx, [esp+.sy0]
lea edx, [esp+.sx0]
lea eax, [ebx+BLITTER.sc]
lea esi, [esp+.sy1]
mov [esp+4], esi
lea esi, [esp+.sx1]
mov [esp], esi
call block_clip
mov esi, 1
test eax, eax
jne .L28
mov edi, [esp+.sx0]
mov edx, [ebx+BLITTER.dst_x]
add edx, edi
sub edx, [ebx+BLITTER.src_x]
mov [esp+.dx0], edx
mov ecx, [esp+.sy0]
mov eax, [ebx+BLITTER.dst_y]
add eax, ecx
sub eax, [ebx+BLITTER.src_y]
mov [esp+.dy0], eax
sub edx, edi
add edx, [esp+.sx1]
mov [esp+.dx1], edx
sub eax, ecx
add eax, [esp+.sy1]
mov [esp+.dy1], eax
lea ecx, [esp+.dy0]
lea edx, [esp+.dx0]
lea eax, [esp+.dy1]
mov [esp+4], eax
lea eax, [esp+.dx1]
mov [esp], eax
mov eax, ebx
call block_clip
test eax, eax
jne .L28
mov edx, [esp+.dx0]
mov eax, [esp+.dx1]
inc eax
sub eax, edx
mov [ebx+BLITTER.w], eax
mov eax, [esp+.dy0]
mov ecx, [esp+.dy1]
inc ecx
sub ecx, eax
mov [ebx+BLITTER.h], ecx
mov ecx, [ebx+BLITTER.src_x]
add ecx, edx
sub ecx, [ebx+BLITTER.dst_x]
mov [ebx+BLITTER.src_x], ecx
mov ecx, [ebx+BLITTER.src_y]
add ecx, eax
sub ecx, [ebx+BLITTER.dst_y]
mov [ebx+BLITTER.src_y], ecx
mov [ebx+BLITTER.dst_x], edx
mov [ebx+BLITTER.dst_y], eax
xor esi, esi
.L28:
mov eax, esi
add esp, 40
pop ebx
pop esi
pop edi
purge .sx0
purge .sy0
purge .sx1
purge .sy1
purge .dx0
purge .dy0
purge .dx1
purge .dy1
ret
align 4
blit_32:
push ebp
push edi
push esi
push ebx
sub esp, 72
mov eax, [TASK_BASE]
mov ebx, [eax-twdw + WDATA.box.width]
mov edx, [eax-twdw + WDATA.box.height]
xor eax, eax
mov [esp+BLITTER.dc.xmin], eax
mov [esp+BLITTER.dc.ymin], eax
mov [esp+BLITTER.dc.xmax], ebx
mov [esp+BLITTER.dc.ymax], edx
mov [esp+BLITTER.sc.xmin], eax
mov [esp+BLITTER.sc.ymin], eax
mov eax, [ecx+24]
dec eax
mov [esp+BLITTER.sc.xmax], eax
mov eax, [ecx+28]
dec eax
mov [esp+BLITTER.sc.ymax], eax
mov eax, [ecx]
mov [esp+BLITTER.dst_x], eax
mov eax, [ecx+4]
mov [esp+BLITTER.dst_y], eax
mov eax, [ecx+16]
mov [esp+BLITTER.src_x], eax
mov eax, [ecx+20]
mov [esp+BLITTER.src_y], eax
mov eax, [ecx+8]
mov [esp+BLITTER.w], eax
mov eax, [ecx+12]
mov [esp+BLITTER.h], eax
mov eax, [ecx+32]
mov [esp+56], eax
mov eax, [ecx+36]
mov [esp+60], eax
mov ecx, esp
call blit_clip
test eax, eax
jne .L57
inc [mouse_pause]
call [_display.disable_mouse]
mov eax, [TASK_BASE]
mov ebx, [esp+BLITTER.dst_x]
mov ebp, [esp+BLITTER.dst_y]
add ebx, [eax-twdw + WDATA.box.left]
add ebp, [eax-twdw + WDATA.box.top]
mov edi, ebp
imul edi, [_display.pitch]
imul ebp, [_display.width]
add ebp, ebx
add ebp, [_WinMapAddress]
mov eax, [esp+BLITTER.src_y]
imul eax, [esp+BLITTER.stride]
mov esi, [esp+BLITTER.src_x]
lea esi, [eax+esi*4]
add esi, [esp+BLITTER.bitmap]
mov ecx, [esp+BLITTER.h]
mov edx, [esp+BLITTER.w]
test ecx, ecx ;FIXME check clipping
jz .L57
test edx, edx
jz .L57
cmp [_display.bpp], 32
jne .core_24
lea edi, [edi+ebx*4]
mov ebx, [CURRENT_TASK]
align 4
.outer32:
xor ecx, ecx
align 4
.inner32:
cmp [ebp+ecx], bl
jne @F
mov eax, [esi+ecx*4]
mov [LFB_BASE+edi+ecx*4], eax
@@:
inc ecx
dec edx
jnz .inner32
add esi, [esp+BLITTER.stride]
add edi, [_display.pitch]
add ebp, [_display.width]
mov edx, [esp+BLITTER.w]
dec [esp+BLITTER.h]
jnz .outer32
.done:
dec [mouse_pause]
call [draw_pointer]
.L57:
add esp, 72
pop ebx
pop esi
pop edi
pop ebp
ret
.core_24:
lea ebx, [ebx+ebx*2]
lea edi, [LFB_BASE+edi+ebx]
mov ebx, [CURRENT_TASK]
align 4
.outer24:
mov [esp+64], edi
xor ecx, ecx
align 4
.inner24:
cmp [ebp+ecx], bl
jne @F
mov eax, [esi+ecx*4]
lea edi, [edi+ecx*2]
mov [edi+ecx], ax
shr eax, 16
mov [edi+ecx+2], al
@@:
mov edi, [esp+64]
inc ecx
dec edx
jnz .inner24
add esi, [esp+BLITTER.stride]
add edi, [_display.pitch]
add ebp, [_display.width]
mov edx, [esp+BLITTER.w]
dec [esp+BLITTER.h]
jnz .outer24
jmp .done