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;    IMGVIEW.ASM

;

;    This program displays jpeg images. The window can be resized.

;

;    Version 0.0    END OF 2003

;                   Octavio Vega

;    Version 0.1    7th March 2004

;                   Mike Hibbett ( very small part! )

;    Version 0.11   7th April 2004

;                   Ville Turjanmaa ( 'set_as_bgr' function )

;    Version 0.12   29th May 2004

;                   Ivan Poddubny (correct "set_as_bgr"+parameters+boot+...)

;    Version 0.12   30 de mayo 2004

;                   Octavio Vega

;                   bugs correction and slideshow

;    version 0.13   3 de junio 2004

;                   Octavio Vega

;                   unos retoques

;    version 0.14   10th August 2004

;                   Mike Hibbett Added setting default colours

;    version 0.15   24th August 2006

;                   diamond (rewritten to function 70)

;

               memsize=20000h

               org 0

 PARAMS     =    memsize - 1024

appname equ 'Jpegview '

version equ '0.15'

use32

               db     'MENUET01'              ; 8 byte id

               dd     0x01                    ; header version

               dd     START                   ; start of code

               dd     I_END                   ; size of image

               dd     memsize                 ; memory for app

               dd     memsize - 1024           ; esp

               dd     PARAMS , 0x0               ; I_Param , I_Icon

stack_size=4096 + 1024

include 'macros.inc'

START:                          ; start of execution

    cmp     [PARAMS], byte 0

    jne     check_parameters

    ; Calculate the 'free' memory available

    ; to the application, and create the malloc block from it

  .l1:

    mov     ecx,memsize-fin-stack_size

    mov     edi,fin

    call    add_mem

    call    colorprecalc ;inicializa tablas usadas para pasar de ybr a bgr

    call    draw_window

    call    read_string.rs_done

still:

    push still

    mov ebx,100                ;1 second

    mov  eax,23                 ; wait here for event

    int  0x40

    cmp  eax,1                  ; redraw request ?

    je   draw_window

    cmp  eax,2                  ; key in buffer ?

    je   read_string

    cmp  eax,3                  ; button in buffer ?

    je   button

    jmp display_next

button:                       ; BUTTON

    mov  eax,17

    int  0x40

    cmp ah,3

    je set_as_bgr2

    cmp ah,2

    je slideshow

    cmp  ah,1                   ; CLOSE PROGRAM

    jne  close_program.exit

close_program:

    mov  eax,-1

    int  0x40

  .exit:

    ret

   ; Put a 'chunk' of the image on the window

put_image:

    pushad

    lea ebp,[edx+eax+7]

    cmp  [winxs],bp

    jc     .l1

    lea ebp,[ecx+ebx+20+2+17]

    cmp [winys],bp

    jc     .l1

    add     eax,2  ; offset for boarder

    add     ebx,2 ; offset for title bar

    push    ax ; pox

    push    bx ; pos

    push    cx ; size

    push    dx ; size

    pop     ecx

    pop     edx

    mov     ebx,edi

    mov     eax,7

    int     40h                         ; Put image function

.l1:

    popad

    ret

;******************************************************************************

check_parameters:

    cmp     [PARAMS], dword "BOOT" ; received BOOT parameter -> goto handler

    je      boot_set_background

    mov     edi, name_string       ; clear string with file name

    mov     al,  0

    mov     ecx, 100

    rep     stosb

    mov     ecx, 100               ; calculate length of parameter string

    mov     edi, PARAMS

    repne   scasb

    sub     edi, PARAMS

    mov     ecx, edi

    mov     esi, PARAMS            ; copy parameters to file name

    mov     edi, name_string

    cld

    rep     movsb

    jmp     START.l1       ; return to beggining of the progra

;******************************************************************************

boot_set_background:

    mov     ecx,memsize-fin-stack_size  ; size

    mov     edi,fin                     ; pointer

    call    add_mem             ; mark memory from fin to 0x100000-1024 as free

    call    colorprecalc        ; calculate colors

    mov     esi,name_string

    call    open

    test    eax,eax

    jz      close_program

    call    jpeg_info

    mov dword [jpeg_st],ebp

    call    set_as_bgr2         ; set wallpaper

    jmp     close_program       ; close the program right now

;******************************************************************************

;******************************************************************************

set_as_bgr2:

    mov ebp,dword[jpeg_st]

    test    ebp,ebp

    jz      .end

    mov     dword [ebp+draw_ptr],put_chunk_to_bgr

    call    jpeg_display

    mov     eax, 15

    mov     ebx, 1

    mov     ecx, [ebp + x_size]

    mov     edx, [ebp + y_size]

    int     0x40

    ; Stretch the image to fit

    mov     eax, 15

    mov     ebx, 4

    mov     ecx, 2

    int     0x40

    mov     eax, 15

    mov     ebx, 3

    int     0x40

 .end:

    ret

;******************************************************************************

put_chunk_to_bgr:

    pushad

    mov     [x_pointer], edi

    mov     esi, ecx

    imul    esi, 3

    mov     [x_numofbytes], esi

    mov     ecx, [ebp + x_size]

    imul    ecx, ebx

    add     ecx, eax

    imul    ecx, 3

    mov     [x_offset], ecx

    mov     [x_counter], edx

    mov     eax, [ebp + x_size]

    imul    eax, 3

    mov     [x_numofb2], eax

 .new_string:

    mov     eax, 15

    mov     ebx, 5

    mov     ecx, [x_pointer]

    mov     edx, [x_offset]

    mov     esi, [x_numofbytes]

    int     0x40

    mov     eax, [x_numofbytes]

    add     [x_pointer], eax

    mov     eax, [x_numofb2]

    add     [x_offset], eax

    dec     [x_counter]

    jnz     .new_string

    popad

    ret

;******************************************************************************

;   *********************************************

;   *******  WINDOW DEFINITIONS AND DRAW ********

;   *********************************************

draw_window:

    mov  eax,48

    mov  ebx,3

    mov  ecx,sc

    mov  edx,sizeof.system_colors

    int  0x40

    mov  eax,12

    mov  ebx,1

    int  0x40

    ; Draw the window to the appropriate size - it may have

    ; been resized by the user

    cmp     [winxs], 0

    jne     dw_001

    ; Give the screen some inital defaults

    mov     [winxs], 400

    mov     [winys], 300

    mov     ax, 100

    mov     [winxo], ax

    mov     [winyo], ax

    jmp     dw_002

dw_001:

    mov     eax, 9

    mov ebx, memsize - 1024

    mov ecx, -1

    int     0x40

    mov     eax, [ebx + 34]

    mov     [winxo], ax

    mov     eax, [ebx + 38]

    mov     [winyo], ax

    mov     eax, [ebx + 42]

    mov     [winxs], ax

    mov     eax, [ebx + 46]

    mov     [winys], ax

dw_002:

        mov     ebx, dword [winxo-2]

        mov     bx, [winxs]

        mov     ecx, dword [winyo-2]

        mov     cx, [winys]

    xor  eax,eax                   ; DRAW WINDOW

    mov  edx,[sc.work]

    or   edx,0x33000000

    mov  edi,header                ; WINDOW LABEL

    int  0x40

    mov  eax,8                     ; BUTTON 2: slideshow

    mov  ebx,57

    mov  cx, [winys]

    sub  cx, 39

    shl  ecx, 16

    add  ecx, 12

    mov  esi, [sc.work_button]

    mov  edx,2

    int  0x40

    mov  eax,4                     ; Button text

    movzx ebx, word [winys]

    add   ebx, 3 shl 16 - 36

    mov  ecx,[sc.work_button_text]

    mov  edx,setname

    mov  esi,setnamelen-setname

    int  0x40

    mov  eax,8                     ; BUTTON 3: set as background

    mov  bx, [winxs]

    sub  bx, 65

    shl  ebx, 16

    mov  bx,55

    mov  cx, [winys]

    sub  cx, 39

    shl  ecx, 16

    add  ecx, 12

    mov  esi, [sc.work_button]

    mov  edx,3

    int  0x40

    mov  eax,4                     ; Button text

    movzx ebx, word [winxs]

    sub   ebx, 63

    shl   ebx,16

    mov   bx, word [winys]

    sub   bx,36

    mov  ecx,[sc.work_button_text]

    mov  edx,setbgr

    mov  esi,setbgrlen-setbgr

    int  0x40

    call    print_strings

    call    load_image

    mov     eax,12                    ; function 12:tell os about windowdraw

    mov     ebx,2                     ; 2, end of draw

    int     0x40

    ret

    ; Read in the image file name.

read_string:

    movzx edi,byte[name_string.cursor]

    add     edi,name_string

    mov     eax,2

    int     0x40                        ; Get the key value

    shr     eax,8

    cmp     eax,13                      ; Return key ends input

    je      .rs_done

    cmp     eax,8

    jnz     .nobsl

    cmp     edi,name_string

    je      .exit

    dec     edi

    mov     [edi],byte 0;'_'

    dec     byte[name_string.cursor]

    jmp     print_strings

.exit:   ret

.nobsl:

    cmp     eax,31

    jbe     .exit

    cmp     eax,97

    jb      .keyok

    sub     eax,32

.keyok:

    mov ah,0

    stosw

    cmp edi,name_string.end

    jnc print_strings

    inc byte[name_string.cursor]

    jmp    print_strings

.rs_done:

    call   print_strings

    mov     esi,name_string

    call    open

    test    eax,eax

    jz      .exit

    call    jpeg_info

    test    ebp,ebp

    jz      close

    xchg    [jpeg_st],ebp

    call jpeg_close

load_image:

    mov     eax,13              ; clear picture area

    movzx    ebx, word [winxs]

    add     ebx, 1  shl 16 -10

    movzx    ecx, word [winys]

    sub     ecx, 40

    add     ecx, 1  shl 16

    mov     edx,[sc.work]

    int     0x40

    mov    ebp,[jpeg_st]

    test    ebp,ebp

    jz      .exit

    mov     dword [ebp+draw_ptr],put_image

    jmp    jpeg_display

 .exit: ret

print_strings:

    pusha

    mov     eax,13              ; clear text area

    movzx   ebx, word [winxs]

    add     ebx, 59 shl 16 -125

    mov     cx, [winys]

    sub     cx, 39

    shl     ecx, 16

    add     ecx, 12

    mov     edx,0xffffff

    int     0x40

    mov     eax,4               ;

    movzx   ebx, word [winys]

    add     ebx, 61 shl 16 - 37

    mov     ecx,0x000000

    mov     edx,name_string

    mov     esi,60

    int     0x40

    popa

    ret

slideshow:

        cmp     [file_dir], 0

        jnz     .exit

        cmp     [jpeg_st], 0

        jz      .exit

        mov     esi, name_string

        movzx   ecx, byte [name_string.cursor]

.l1:

        cmp     byte [esi+ecx], '/'

        jz      .l2

        loop    .l1

.exit:

        ret

.l2:

        mov     byte [esi+ecx], 0

        call    open

        mov     byte [esi+ecx], '/'

        test    eax, eax

        jz      .exit

        test    byte [fileattr], 0x10

        jz      .exit

        mov     [file_dir], eax

        inc     ecx

        mov     [name_string.cursor], cl

display_next:

        mov     ebx, [file_dir]

        test    ebx, ebx

        jnz     @f

        ret

@@:

        mov     byte [ebx], 1

        mov     byte [ebx+12], 1

        mov     dword [ebx+16], dirinfo

        mov     eax, 70

        int     0x40

        mov     eax, [file_dir]

        inc     dword [eax+4]

        cmp     ebx, 1

        jz      @f

        mov     eax, [file_dir]

        and     [file_dir], 0

        jmp     close

@@:

        movzx   edi, byte [name_string.cursor]

        add     edi, name_string

        lea     esi, [dirinfo+32+40]

@@:

        lodsb

        stosb

        test    al, al

        jnz     @b

        mov     ecx, name_string.end

        sub     ecx, edi

        rep     stosb

    call   print_strings

    mov     esi,name_string

    call    open

    test    eax,eax

    jz      display_next

    call    jpeg_info

    test    ebp,ebp

    jnz     .l6

    call close

    jmp display_next

   .l6:

    mov dword[ebp+draw_ptr],put_image

    push ebp

    xchg [jpeg_st],ebp

    call jpeg_close

    pop ebp

    jmp jpeg_display

include 'filelib.asm'

include 'memlib.asm'

include 'jpeglib.asm'

; DATA AREA

wcolor          dd  0x000000

header          db  appname,version,0

setname          db  'SLIDESHOW'

setnamelen:

setbgr           db  '   BGR  '

setbgrlen:

x_pointer       dd  0

x_offset        dd  0

x_numofbytes    dd  0

x_numofb2       dd  0

x_counter       dd  0

winxo           dw  0

winyo           dw  0

winxs           dw  0

winys           dw  0

jpeg_st         dd  0

file_dir        dd  0

name_string:    db '/rd/1/jpegview.jpg',0

rb 256

    .end:

    .cursor: db 19

    .cursor2: db 0

align 4

rgb16:          db 0,4,8,13,17,21,25,29,34,38,42,46,50,55,59,63

rgb4:           db 0,21,42,63

include 'jpegdat.asm'

align 4

iniciomemoria:

              dd -(iniciomemoria+4),-(iniciomemoria+4),(iniciomemoria+4),.l1,0

.l1           dd 0

fin:

I_END:

sc     system_colors

fileattr: rb 40

dirinfo: rb 32+304