i have already all the code done, but it's not working and i don't known where is the problem
CODE:
void muda_pixeis_asm_f3(int altura, int largura, Byte *porig[], Byte *pdest[])
{
/*************************************
ebp+20 pdest
ebp+16 porig
ebp+12 largura
ebp+8 altura
ebp-4 x
ebp-8 y
ebp-12 ml
ebp-16 ma
ebp-20 tx
ebp-24 factor
*************************************/
asm
{
sub esp, 24 //int x, y, ml, ma, tx, factor
//declaraç?o de variaveis
X EQU dword ptr [ebp-4]
Y EQU dword ptr [ebp-8]
ML EQU dword ptr [ebp-12]
MA EQU dword ptr [ebp-16]
TX EQU dword ptr [ebp-20]
FACTOR EQU dword ptr [ebp-24]
mov eax, dword ptr [ebp+12]
mov ecx, 2
cdq
idiv ecx
mov ML, eax // ml = largura / 2;
mov eax, dword ptr [ebp+8]
mov ecx, 2
cdq
idiv ecx
mov MA, eax // ma = altura / 2;
mov Y, 0 //y = 0
f3_ciclo_y_inicio:
mov eax, Y
cmp eax, dword ptr [ebp+8] //y < altura ?
jge f3_ciclo_y_fim
mov X, 0 //x=0
f3_ciclo_x_inicio:
mov eax, dword ptr [ebp+12]
add eax, eax
add eax, dword ptr [ebp+12] //largura * 3
cmp X, eax //x < largura * 3 ?
jge f3_ciclo_x_fim
//**
mov eax, X
mov ecx, 3
cdq
idiv ecx
mov TX, eax // tx = x / 3;
sub eax, ML
mul eax
mov TX, eax //TX passa a (tx-ml)*(tx-ml)
mov eax, Y
sub eax, MA
mul eax //eax -> (y-ma)*(y-ma)
add TX, eax //TX passa a (tx-ml)*(tx-ml) + (y-ma)*(y-ma)
mov eax, TX
mov ecx, 1000
mul ecx
mov TX, eax //TX passa a 1000 * ((tx-ml)*(tx-ml) + (y-ma)*(y-ma))
mov eax, ML
mul ML
mov ecx, eax //ecx passa a (ml * ml)
mov eax, MA
mul MA //eax passa a (ma * ma)
add ecx, eax //ecx -> (ml*ml + ma*ma)
mov eax, TX
cdq
idiv ecx
mov TX, eax // tx = 1000 * ((tx-ml)*(tx-ml) + (y-ma)*(y-ma)) / (ml*ml + ma*ma)
mov eax, 1000
sub eax, TX //eax -> 1000 - 1000 * ((tx-ml)*(tx-ml) + (y-ma)*(y-ma)) / (ml*ml + ma*ma)
mov FACTOR, eax
mov ebx, dword ptr [ebp+16] //porig
mov ecx, X //x
mov edx, Y //y
mov esi, dword ptr [ebx+4*edx] //point linha da img orig
mov al, byte ptr [esi+ecx] //porig [y][x] -> al
mul FACTOR
mov ecx, 1000
cdq
idiv ecx
mov ebx, dword ptr [ebp+20] //pdest
mov ecx, X //x
mov edx, Y //y
mov edi, dword ptr [ebx+4*edx] //point linha da img dest
mov byte ptr [edi+ecx], al //pdest[y][x]= (porig[y][x] * factor) / 1000
mov ebx, dword ptr [ebp+16] //porig
mov ecx, X //x
inc ecx //x+1
mov edx, Y //y
mov esi, dword ptr [ebx+4*edx] //point linha da img orig
mov al, byte ptr [esi+ecx] //porig [y][x+1] -> al
mul FACTOR
mov ecx, 1000
cdq
idiv ecx
mov ebx, dword ptr [ebp+20] //pdest
mov ecx, X //x
inc ecx //x+1
mov edx, Y //y
mov edi, dword ptr [ebx+4*edx] //point linha da img dest
mov byte ptr [edi+ecx], al //pdest[y][x+1]= (porig[y][x+1] * factor) / 1000
mov ebx, dword ptr [ebp+16] //porig
mov ecx, X //x
add ecx, 2 //x+2
mov edx, Y //y
mov esi, dword ptr [ebx+4*edx] //point linha da img orig
mov al, byte ptr [esi+ecx] //porig [y][x+2] -> al
mul FACTOR
mov ecx, 1000
cdq
idiv ecx
mov ebx, dword ptr [ebp+20] //pdest
mov ecx, X //x
add ecx, 2 //x+2
mov edx, Y //y
mov edi, dword ptr [ebx+4*edx] //point linha da img dest
mov byte ptr [edi+ecx], al //pdest[y][x+2]= (porig[y][x+2] * factor) / 1000
//**
add X, 3 //x = x + 3
jmp f3_ciclo_x_inicio
f3_ciclo_x_fim:
inc Y //y++
jmp f3_ciclo_y_inicio
f3_ciclo_y_fim:
add esp, 24 //liberta espaço x, y, ml, ma, tx, factor
}
}
