Chip 2002 June/Chip_2002-06_cd1.bin/tema/grafika_plugin/install/FlipsRolls/fliproll.exe/Main/bflop.asm

Assembly Source File | 2002-05-06 | 4.6 KB | 258 lines

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; bflop.asm
;;
;; Copyright 1999 G. Adam Stanislav
;; All rights reserved
;;
;; Started: 18-Nov-1999
;; Updated: 18-Nov-1999
;;
;; This is a Photoshop plugin which flops the blue channel of an image.
;;
;; This source code can be assembled by NASM:
;;
;;    nasm -f win32 bflop.asm
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

%include    'filter.inc'

global    filter.parameters, filter.prepare, filter.start
global    filter.continue, filter.finish

section    .drectve    info
db    "-out:rpBFlop.8bf "

section    .data
total    dd    0
partial    dd    0
global    filter.name
filter.name    db    "Flop Blue", 0

section    .text align=4

    ; These procedures receive four parameters:
    ;
    ;    [esp+ 4] = selector (word) = EAX
    ;    [esp+ 8] = address of filterParamBlock
    ;    [esp+12] = address of data
    ;    [esp+16] = address of result word, contains 0 (success)

align 4
error.return:
    mov    ecx, [esp+16]
    mov    word [ecx], filterBadParameters
    ret

align 4
filter.start:
    ; Get the pointer to the parameter block
    mov    ecx, [esp+8]

    ; Quit if NULL.
    jecxz    error.return

    ; Tell the host to give us r,g,b planes
    mov    eax, 2 << 16
    mov    [ecx+inLoPlane], eax
    mov    [ecx+outLoPlane], eax

    ; Calculate the total number of pixels
    movzx    eax, word [ecx+filterRect+right]
    sub    ax, [ecx+filterRect+left]
    movzx    edx, word [ecx+filterRect+bottom]
    sub    dx, [ecx+filterRect+top]
    mul    edx
    mov    [total], eax
    sub    edx, edx
    mov    [partial], edx

    ; Ask the host for a NUMCOLSxNUMROWS input and output data. Less if the
    ; image is small.
    movzx    eax, word [ecx+filterRect+right]
    movzx    edx, word [ecx+filterRect+left]
    sub    ax, dx

    cmp    ax, NUMCOLS
    jb    .X
    mov    ax, NUMCOLS-1

.X:
    mov    [ecx+inRect+left], dx
    mov    [ecx+outRect+left], dx
    add    ax, dx
    mov    [ecx+inRect+right], ax
    mov    [ecx+outRect+right], ax

    mov    ax, [ecx+filterRect+bottom]
    mov    dx, [ecx+filterRect+top]
    sub    ax, dx

    cmp    ax, NUMROWS
    jb    .Y
    mov    ax, NUMROWS-1

.Y:
    mov    [ecx+inRect+top], dx
    mov    [ecx+outRect+top], dx
    add    ax, dx
    mov    [ecx+inRect+bottom], ax
    mov    [ecx+outRect+bottom], ax

    ret

align 4
filter.continue:

    mov    ecx, [esp+8]
    or    ecx, ecx
    je    near error.return

    ; Calculate how far we are
    movzx    eax, word [ecx+inRect+right]
    sub    ax, [ecx+inRect+left]
    movzx    edx, word [ecx+inRect+bottom]
    sub    dx, [ecx+inRect+top]
    mul    edx
    add    [partial], eax

    push    ecx
    push    dword [total]
    push    dword [partial]
    call    [ecx+progressProc]
    add    esp, 8
    pop    edx

    push    esi
    push    edi

    mov    esi, [edx+inData]
    mov    edi, [edx+outData]

    movzx    ecx, word [edx+inRect+bottom]
    sub    cx, [edx+inRect+top]

    sub    eax, eax
    cld

    ; ECX = number of rows

.bigloop:
    push    ecx

    mov    cx, word [edx+inRect+right]
    sub    cx, [edx+inRect+left]

    ; ECX = number of columns

    push    esi
    push    edi

    ; To produce a negative, we do not negate the channel.
    ; We invert it.
.filterloop:
    lodsb
    stosb

    lodsb
    stosb

    lodsb
    not    al
    stosb

    loop    .filterloop

    pop    edi
    pop    esi

    add    esi, [edx+inRowBytes]
    add    edi, [edx+outRowBytes]
    pop    ecx
    loop    .bigloop

    pop    edi
    pop    esi

    mov    ecx, edx

    ; See if there are more columns to process within these rows.
    movzx    eax, word [ecx+inRect+right]
    cmp    ax, [ecx+filterRect+right]
    jae    .rows

.left:
    mov    [ecx+inRect+left], ax
    mov    [ecx+outRect+left], ax
    add    ax, NUMCOLS-1
    cmp    ax, [ecx+filterRect+right]
    jbe    .right
    mov    ax, [ecx+filterRect+right]

.right:
    mov    [ecx+inRect+right], ax
    mov    [ecx+outRect+right], ax

    ret

.rows:
    ; See if there are any unprocessed rows
    movzx    eax, word [ecx+inRect+bottom]
    cmp    ax, [ecx+filterRect+bottom]
    jae    filter.cleanup    ; all done
    mov    [ecx+inRect+top], ax
    mov    [ecx+outRect+top], ax
    add    ax, NUMROWS-1
    cmp    ax, [ecx+filterRect+bottom]
    jbe    .bottom
    mov    ax, [ecx+filterRect+bottom]

.bottom:
    mov    [ecx+inRect+bottom], ax
    mov    [ecx+outRect+bottom], ax

    movzx    eax, word [ecx+filterRect+left]
    jmp    .left


align 4
filter.cleanup:
    sub    eax, eax
    mov    [ecx+inRect], eax
    mov    [ecx+inRect+4], eax
    mov    [ecx+outRect], eax
    mov    [ecx+outRect+4], eax
    mov    [ecx+inLoPlane], eax
    mov    [ecx+outLoPlane], eax

.done:
    ret

align 4
filter.prepare:
    mov    ecx, [esp+8]
    or    ecx, ecx
    jz    near error.return

    mov    eax, NUMROWS*NUMCOLS*4
    cmp    eax, [ecx+maxSpace]
    ja    near error.return
    mov    [ecx+maxSpace], eax
    sub    eax, eax
    mov    [ecx+bufferSpace], eax

    ; FALL THROUGH

filter.finish:
    ; Nothing to finish. Just return.

    ; FALL THROUGH

filter.parameters:
    ; No parameters required. Just return.

    ret

align 4