menuzin.asm

.macro menu()
	start:
	addi $v0, $zero, 4 #loads v0 for print syscall
	la $a0, mainmenu #printcontent adress
	syscall

	addi $v0, $zero, 5 #loads v0 for read int syscall
	syscall #saves value to v0

	#all read syscalls request int numbers.Any other input will trigger coproc0.

	beq $v0, 1, blurm #if 1 is chosen, go to blur menu
	beq $v0, 2, edgem #if 2 is chosen, go to edge extractor menu
	beq $v0, 3, binam #if 3 is chosen, go to binary threshold menu
	beq $v0, 4, exit #if 4 is chosen, exit program
	#if the user types any other value, a error message is printed
	addi $v0, $zero, 4 #loads v0 for print syscall
	la $a0, errormain #error message adress
	syscall
	j start
	blurm: #blur menu
		addi $v0, $zero, 4 #loads v0 for print syscall
		la $a0, kernelmenu #print content adress
		syscall

	blurread: 
		addi $v0, $zero, 5 #loads v0 for read syscall
		syscall #saves value to v0

		#from bge to contblur, checks if the typed value is beetween 1 and 3. if it isn't, requests another value
		bge $v0,1,condblur1 
		j blurread
	condblur1:
		ble $v0,3,contblur
		j blurread
	contblur: 

	j start #returns to main menu

	edgem: #edge extractor menu

		addi $v0, $zero, 4 #loads v0 for print syscall
		la $a0, kernelmenu #print content adress
		syscall

	edgeread: 
		addi $v0, $zero, 5 #loads v0 for read syscall
		syscall #saves value to v0

		##from bge to contedge, checks if the typed value is beetween 1 and 3. if it isn't, requests another value
		bge $v0,1,condedge1 
		j edgeread
	condedge1: 
		ble $v0,3,contedge
		j edgeread
	contedge: 

		j start #returns to main menu
	
	binam: #binary threshold menu
		addi $v0, $zero, 4 #loads v0 for print syscall
		la $a0, binamenu #print content adress
		syscall
	binaread: 
		addi $v0, $zero, 5 #loads v0 for read int syscall
		syscall #saves value to v0

		##from bge to contbina, checks if the typed value is beetween 1 and 10. if it isn't, requests another value
		bge $v0,1,condbina1 
		j binaread
	condbina1: 
		ble $v0,10,contbina
		j binaread
	contbina: 

		j start
	exit:
.end_macro

.data
	mainmenu: .asciiz "selecione uma operacao:\n1)blur\n2)edge extractor\n3)binarizacao\n4)exit\n" 
	errormain: .asciiz "opcao invalida, selecione uma opcao listada."
	kernelmenu: .asciiz "selecione o tamanho do kernel:\n1)3x3\n2)5x5\n3) 7x7\n"
	binamenu: .asciiz "escolha uma intensidade de 1 a 10:\n"