BMP ファイルの内容を読み取り、画像に対して滑らかなデジタル フィルターを実行するプロジェクトに取り組んでいます。以下の私のコードはほとんど仕事をします。処理されたピクセルをどこに保存する必要があるのか 、処理された画像をファイルに書き込む方法がわかりません。以下の私のコードはコメントアウトされているので、助けていただければ幸いです。
.586
.model flat, stdcall
option casemap :none
include ..\masm32\include\windows.inc
include ..\masm32\include\user32.inc
include ..\masm32\include\kernel32.inc
include ..\masm32\macros\macros.asm
include ..\masm32\include\masm32.inc
includelib ..\masm32\lib\user32.lib
includelib ..\masm32\lib\kernel32.lib
includelib ..\masm32\lib\masm32.lib
.data
FileName db "bitmap2.bmp", 0
filename db "bitmap_fil.bmp",0
errMsg BYTE "Cannot create file",0dh,0ah,0
hFile HANDLE ?
hwFile HANDLE ?
hMemory HANDLE ? ;incoming data
pMemory DWORD ?
hMemory_o HANDLE ? ;outgoing data
pMemory_o DWORD ?
ReadSize DWORD ?
bytesWritten DWORD ?
firstLine DWORD ?
FileSize DWORD ?
BDoff DWORD ?
BHSize DWORD ?
szTemp byte 16 dup (0) ;buffer for messages
szPrime byte "%08i", 0 ;message format string
szPrimeH byte "%08lx",0 ;message hexa format string
signature DD 0
MEMORYSIZE equ 65535 ;This is how much memory allocated
; to store the file.
im_offset dd ?
im_width dd ?
im_height dd ?
bits_pix dd ?
.code
;................................
show MACRO caption, value
print SADD(caption)
mov eax, value
invoke wsprintf, offset szTemp, offset szPrime, eax ;converts eax into string
print offset szTemp ;print string
print SADD(13,10)
ENDM
;..................................
start:
invoke CreateFile, addr FileName,GENERIC_READ,FILE_SHARE_READ,NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL
mov hFile, eax
;Allocate and lock the memory for incoming file.
invoke GlobalAlloc, GMEM_MOVEABLE or GMEM_ZEROINIT, MEMORYSIZE
mov hMemory, eax
invoke GlobalLock, hMemory
mov pMemory, eax
;Allocate and lock the memory for outgoing file.
invoke GlobalAlloc, GMEM_MOVEABLE or GMEM_ZEROINIT, MEMORYSIZE
mov hMemory_o, eax
invoke GlobalLock, hMemory_o
mov pMemory_o, eax
;Read file and save image parameters
invoke ReadFile, hFile, pMemory, MEMORYSIZE-1, addr ReadSize, NULL
mov esi, pMemory
add esi, 02 ;get filesize
mov edi, [esi]
mov FileSize,edi
invoke wsprintf, offset szTemp, offset szPrime, edi
print offset szTemp
print SADD(10,13)
add esi, 8 ; jump 8 bytes to get image offset
mov edi, [esi] ; get image offset
mov im_offset,edi
invoke wsprintf, offset szTemp, offset szPrimeH, edi
print offset szTemp
print SADD(10,13)
add esi,8 ;jump 8 bytes to get image width
mov edi, [esi] ; get image width
mov im_width, edi
invoke wsprintf, offset szTemp, offset szPrime, edi
print offset szTemp
print SADD(10,13)
add esi,4 ;jump 4 bytes to get image height
mov edi, [esi] ; get image height
mov im_height, edi
invoke wsprintf, offset szTemp, offset szPrime, edi
print offset szTemp
print SADD(10,13)
add esi,4 ;jump 4 bytes to get color plane
mov ebx, [esi]
shr ebx,16 ; get color plane and bit-pix
mov bits_pix,ebx ;
print SADD("bit-per-pix ")
invoke wsprintf, offset szTemp, offset szPrime, ebx
print offset szTemp
print SADD(10,13)
mov ebp, pMemory ; get ready to start processing the image
add ebp, im_offset ; esi now points to the first pix
;filtering process
;leave first row and first column and last row and last column untouched.
mov esi,1 ; esi is the row counter
mov edi,1 ; edi is the column counter
proc_pix:
;show "current column is: ",edi
;show "current row is: ",esi
xor ebx,ebx ; ebx = 0 ebx will accumulate intermediate values for averaging
mov eax, im_width ; eax is the pointer to the pixel
mul esi
add eax,edi
add ebx, [ebp+eax] ;get the pixel(I,J)
mov eax, im_width
add esi,1 ;next row (I+1)
mul esi
add eax,edi
add ebx, [ebp+eax] ;get the pixel(I+1,J)
mov eax, im_width
sub esi,2 ; prev row (I-1)
mul esi
add eax,edi
add ebx, [ebp+eax] ;get the pixel(I-1,J)
add esi,1 ;back to the current row
add edi,1 ;get next column (J+1)
mov eax, im_width
mul esi
add eax,edi
add ebx, [ebp+eax] ;get the pixel(I,J+1)
sub edi,2 ; get prev column (J-1)
mov eax, im_width
mul esi
add eax,edi
add ebx, [ebp+eax] ;get the pixel(I,J-1)
add edi,1 ;back current column
xor edx, edx ;clear upper part dividend
mov eax, ebx ; move data to eax to divide
mov ecx, 5
div ecx ;do the average (div 5)>>> result in eax
; where should I store the processed pixels?
inc edi ; do the next column
cmp edi, im_width
jl proc_pix
inc esi ; do the next row
mov edi,1 ; skip the first column
cmp esi, im_height
jl proc_pix
;....................................................................................
new_file:
invoke CreateFile,ADDR filename, GENERIC_WRITE, NULL, NULL,CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0
mov hwFile,eax ; save file handle
; handling of error if invalid file handle
cmp eax,INVALID_HANDLE_VALUE
jne writef
invoke StdOut, addr errMsg ; Display error message
jmp QuitNow
writef: invoke WriteFile, hwFile, pMemory_o, FileSize, ADDR bytesWritten, 0
QuitNow:
invoke GlobalUnlock, pMemory
invoke GlobalUnlock, pMemory_o
invoke GlobalFree, hMemory
invoke CloseHandle, hFile
invoke CloseHandle, hwFile
invoke ExitProcess, NULL
end start
;finish