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e049b4d610
kolibrios/programs/develop/libraries/libs-dev/libimg/tiff/tiff.asm
Ivan Baravy e049b4d610 libimg: 
read lzw-encoded tiff images
handle predictor tag in tiff files


git-svn-id: svn://kolibrios.org@2992 a494cfbc-eb01-0410-851d-a64ba20cac60
2012-10-29 16:17:45 +00:00

1191 lines
24 KiB
NASM
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;;================================================================================================;;
;;//// tiff.asm //// (c) dunkaist, 2011-2012 /////////////////////////////////////////////////////;;
;;================================================================================================;;
;; ;;
;; This file is part of Common development libraries (Libs-Dev). ;;
;; ;;
;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;;
;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;;
;; of the License, or (at your option) any later version. ;;
;; ;;
;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;;
;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;;
;; Lesser General Public License for more details. ;;
;; ;;
;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;;
;; If not, see <http://www.gnu.org/licenses/>. ;;
;; ;;
;;================================================================================================;;
include 'tiff.inc'
;;================================================================================================;;
proc img.is.tiff _data, _length ;/////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Determine if raw data could be decoded (is in tiff format) ;;
;;------------------------------------------------------------------------------------------------;;
;> _data = raw data as read from file/stream ;;
;> _length = data length ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
push esi
mov esi, [_data]
lodsw
cmp ax, word 'II'
je .little_endian
cmp ax, word 'MM'
je .big_endian
jmp .is_not_tiff
.little_endian:
lodsw
cmp ax, 0x002A
je .is_tiff
jmp .is_not_tiff
.big_endian:
lodsw
cmp ax, 0x2A00
je .is_tiff
.is_not_tiff:
pop esi
xor eax, eax
ret
.is_tiff:
pop esi
xor eax, eax
inc eax
ret
endp
;;================================================================================================;;
proc img.decode.tiff _data, _length, _options ;///////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Decode data into image if it contains correctly formed raw data in tiff format ;;
;;------------------------------------------------------------------------------------------------;;
;> _data = raw data as read from file/stream ;;
;> _length = data length ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 (error) or pointer to image ;;
;;================================================================================================;;
locals
_endianness rd 1 ; 0 stands for LE, otherwise BE
retvalue rd 1 ; 0 (error) or pointer to image
endl
push ebx edx esi edi
mov esi, [_data]
lodsw
mov [_endianness], 0
cmp ax, word 'II'
seta byte[_endianness]
lodsw_
lodsd_
@@:
stdcall tiff._.parse_IFD, [_data], eax, [_endianness]
mov ebx, eax
mov [retvalue], eax
lodsd_
test eax, eax
; jnz @b
.quit:
mov eax, [retvalue]
pop edi esi edx ebx
ret
endp
;;================================================================================================;;
proc img.encode.tiff _img, _p_length, _options ;//////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Encode image into raw data in tiff format ;;
;;------------------------------------------------------------------------------------------------;;
;> _img = pointer to image ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 (error) or pointer to encoded data ;;
;< _p_length = encoded data length ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;! Below are private procs you should never call directly from your code ;;
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
proc tiff._.parse_IFD _data, _IFD, _endianness
locals
extended rd 1
retvalue rd 1
decompress rd 1
endl
push ebx edx edi
mov [retvalue], 0
invoke mem.alloc, sizeof.tiff_extra
test eax, eax
jz .quit
mov [extended], eax
mov ebx, eax
mov edi, eax
mov ecx, sizeof.tiff_extra/4
xor eax, eax
rep stosd
mov esi, [_IFD]
add esi, [_data]
lodsw_
movzx ecx, ax
@@:
push ecx
stdcall tiff._.parse_IFDE, [_data], [_endianness]
pop ecx
dec ecx
jnz @b
call tiff._.define_image_type
stdcall img.create, [ebx + tiff_extra.image_width], [ebx + tiff_extra.image_height], eax
test eax, eax
jz .quit
mov [retvalue], eax
mov edx, eax
mov [edx + Image.Extended], ebx
cmp [ebx+tiff_extra.compression], TIFF.COMPRESSION.UNCOMPRESSED
jne @f
mov [decompress], tiff._.decompress.uncompressed
jmp .decompressor_defined
@@:
cmp [ebx + tiff_extra.compression], TIFF.COMPRESSION.PACKBITS
jne @f
mov [decompress], tiff._.decompress.packbits
jmp .decompressor_defined
@@:
cmp [ebx + tiff_extra.compression], TIFF.COMPRESSION.LZW
jne @f
mov [decompress], tiff._.decompress.lzw
jmp .decompressor_defined
@@:
cmp [ebx + tiff_extra.compression], TIFF.COMPRESSION.CCITT1D
jne @f
mov [decompress], tiff._.decompress.ccitt1d
jmp .decompressor_defined
@@:
mov [decompress], 0
jmp .quit
.decompressor_defined:
push esi ; fixme!!
mov ecx, [edx + Image.Type]
dec ecx
jz .bpp8i
dec ecx
jz .bpp24
dec ecx
jz .bpp32
dec ecx
dec ecx ; tiff doesn't handle 15bpp images
jz .bpp16
dec ecx
jz .bpp1
dec ecx
jz .bpp8g
dec ecx
jz .bpp8a
;error report!!
.bpp1:
.bpp1.palette:
mov edi, [edx+Image.Palette]
cmp [ebx + tiff_extra.photometric], TIFF.PHOTOMETRIC.BLACK_IS_ZERO
jne .bpp1.white_is_zero
.bpp1.black_is_zero:
mov [edi], dword 0x00000000
mov [edi + 4], dword 0x00ffffff
jmp .common
.bpp1.white_is_zero:
mov [edi], dword 0x00ffffff
mov [edi + 4], dword 0x00000000
jmp .common
.bpp4:
jmp .common
.bpp8i:
mov esi, [ebx + tiff_extra.palette]
mov ah, 2
.bpp8.channel:
mov edi, eax
and edi, 0x0000ff00
shr edi, 8
add edi, [edx + Image.Palette]
mov ecx, 256
@@:
lodsb
stosb
lodsb
add edi, 3
dec ecx
jnz @b
dec ah
jns .bpp8.channel
jmp .common
.bpp8g:
jmp .common
.bpp8a:
jmp .common
.bpp16:
jmp .common
.bpp24:
jmp .common
.bpp32:
jmp .common
.common:
mov edi, [edx+Image.Data]
mov esi, [ebx+tiff_extra.strip_offsets]
mov edx, [ebx+tiff_extra.strip_byte_counts]
cmp [ebx + tiff_extra.strip_offsets_length], TIFF.IFDE_TYPE_LENGTH.SHORT
jne .l_x
cmp [ebx + tiff_extra.strip_byte_counts_length], TIFF.IFDE_TYPE_LENGTH.SHORT
jne .s_l
jmp .s_s
.l_x: cmp [ebx + tiff_extra.strip_byte_counts_length], TIFF.IFDE_TYPE_LENGTH.SHORT
jne .l_l
jmp .l_s
.s_s:
xor eax, eax
lodsw_
push esi
mov esi, eax
add esi, [_data]
xor ecx, ecx
mov cx, word[edx]
test [_endianness], 1
jz @f
xchg cl, ch
@@:
add edx, 2
stdcall [decompress], [retvalue]
pop esi
dec [ebx + tiff_extra.offsets_number]
jnz .s_s
jmp .decoded
.s_l:
xor eax, eax
lodsw_
push esi
mov esi, eax
add esi, [_data]
mov ecx, [edx]
test [_endianness], 1
jz @f
bswap ecx
@@:
add edx, 4
stdcall [decompress], [retvalue]
pop esi
dec [ebx + tiff_extra.offsets_number]
jnz .s_l
jmp .decoded
.l_s:
lodsd_
push esi
mov esi, eax
add esi, [_data]
xor ecx, ecx
mov cx, word[edx]
test [_endianness], 1
jz @f
xchg cl, ch
@@:
add edx, 2
stdcall [decompress], [retvalue]
pop esi
dec [ebx + tiff_extra.offsets_number]
jnz .l_s
jmp .decoded
.l_l:
lodsd_
push esi
mov esi, eax
add esi, [_data]
mov ecx, [edx]
test [_endianness], 1
jz @f
bswap ecx
@@:
add edx, 4
stdcall [decompress], [retvalue]
pop esi
dec [ebx + tiff_extra.offsets_number]
jnz .l_l
jmp .decoded
.decoded:
.post.rgb_bgr:
cmp [ebx + tiff_extra.samples_per_pixel], 3
jne .post.rgba_bgra
mov eax, [retvalue]
mov esi, [eax + Image.Data]
mov edi, [eax + Image.Data]
mov ecx, [eax + Image.Width]
imul ecx, [eax + Image.Height]
@@:
lodsw
movsb
mov byte[esi - 1], al
add edi, 2
dec ecx
jnz @b
.post.rgba_bgra:
cmp [ebx + tiff_extra.samples_per_pixel], 4
jne .post.bpp8a_to_bpp8g
mov eax, [retvalue]
mov esi, [eax + Image.Data]
mov edi, [eax + Image.Data]
mov ecx, [eax + Image.Width]
imul ecx, [eax + Image.Height]
@@:
lodsw
movsb
mov byte[esi - 1], al
add edi, 3
add esi, 1
dec ecx
jnz @b
.post.bpp8a_to_bpp8g:
mov eax, [retvalue]
cmp [eax + Image.Type], Image.bpp8a
jne .post.predictor
mov ebx, [retvalue]
stdcall tiff._.pack_8a, ebx
mov [ebx + Image.Type], Image.bpp8g
.post.predictor:
cmp [ebx + tiff_extra.predictor], 2 ; Horizontal differencing
jne .post.end
push ebx
mov edi, [ebx + tiff_extra.samples_per_pixel]
mov edx, edi
mov ebx, [retvalue]
.post.predictor.plane:
mov esi, [ebx + Image.Data]
sub esi, 1
add esi, edx
mov ecx, [ebx + Image.Height]
.post.predictor.line:
push ecx
mov ecx, [ebx + Image.Width]
sub ecx, 1
mov ah, byte[esi]
add esi, edi
@@:
mov al, byte[esi]
add al, ah
mov byte[esi], al
add esi, edi
shl eax, 8
dec ecx
jnz @b
pop ecx
dec ecx
jnz .post.predictor.line
dec edx
jnz .post.predictor.plane
pop ebx
.post.end:
.pop_quit:
pop esi
.quit:
pop edi edx ebx
mov eax, [retvalue]
ret
endp
proc tiff._.parse_IFDE _data, _endianness
push ebx edx edi
lodsw_
mov edx, tiff.IFDE_tag_table.begin
mov ecx, (tiff.IFDE_tag_table.end-tiff.IFDE_tag_table.begin)/8
.tag:
cmp ax, word[edx]
jne @f
lodsw_
jmp dword[edx + 4]
@@:
add edx, 8
dec ecx
jnz .tag
.tag_default: ; unknown/unsupported/unimportant
lodsw
lodsd
lodsd
jmp .quit ; just skip it
.tag_100: ; ImageWidth
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
lodsd
xor eax, eax
lodsw_
mov [ebx + tiff_extra.image_width], eax
lodsw
jmp .quit
@@:
cmp ax, TIFF.IFDE_TYPE.LONG
jne @f
lodsd
lodsd_
mov [ebx + tiff_extra.image_width], eax
jmp .quit
@@:
jmp .quit
.tag_101: ; ImageHeight
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
lodsd
xor eax, eax
lodsw_
mov [ebx + tiff_extra.image_height], eax
lodsw
jmp .quit
@@:
cmp ax, TIFF.IFDE_TYPE.LONG
jne @f
lodsd
lodsd_
mov [ebx + tiff_extra.image_height], eax
jmp .quit
@@:
jmp .quit
.tag_102: ; BitsPerSample
lodsd_
imul eax, TIFF.IFDE_TYPE_LENGTH.SHORT
cmp eax, 4
ja @f
xor eax, eax
lodsw_
mov [ebx + tiff_extra.bits_per_sample], eax
lodsw
jmp .quit
@@:
lodsd_
add eax, [_data]
push esi
mov esi, eax
xor eax, eax
lodsw_
pop esi
mov [ebx + tiff_extra.bits_per_sample], eax
jmp .quit
.tag_103: ; Compression
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
lodsd
xor eax, eax
lodsw_
mov [ebx + tiff_extra.compression], eax
lodsw
jmp .quit
@@:
jmp .quit
.tag_106: ; PhotometricInterpretation
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
lodsd
xor eax, eax
lodsw_
mov [ebx + tiff_extra.photometric], eax
lodsw
jmp .quit
@@:
jmp .quit
.tag_111: ; StripOffsets
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
mov [ebx + tiff_extra.strip_offsets_length], TIFF.IFDE_TYPE_LENGTH.SHORT
jmp .tag_111.common
@@:
mov [ebx + tiff_extra.strip_offsets_length], TIFF.IFDE_TYPE_LENGTH.LONG
.tag_111.common:
lodsd_
mov [ebx + tiff_extra.offsets_number], eax
imul eax, [ebx+tiff_extra.strip_offsets_length]
cmp eax, 4
ja @f
mov [ebx + tiff_extra.strip_offsets], esi
lodsd
jmp .quit
@@:
lodsd_
add eax, [_data]
mov [ebx + tiff_extra.strip_offsets], eax
jmp .quit
.tag_115: ; SamplesPerPixel
lodsd_
imul eax, TIFF.IFDE_TYPE_LENGTH.SHORT
cmp eax, 4
ja @f
xor eax, eax
lodsw_
mov [ebx + tiff_extra.samples_per_pixel], eax
lodsw
jmp .quit
@@:
lodsd_
add eax, [_data]
movzx eax, word[eax]
jmp .quit
.tag_116: ; RowsPerStrip
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
lodsd
xor eax, eax
lodsw_
mov [ebx + tiff_extra.rows_per_strip], eax
lodsw
jmp .quit
@@:
lodsd
lodsd_
mov [ebx + tiff_extra.rows_per_strip], eax
jmp .quit
.tag_117: ; StripByteCounts
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
mov [ebx + tiff_extra.strip_byte_counts_length], TIFF.IFDE_TYPE_LENGTH.SHORT
jmp .tag_117.common
@@:
mov [ebx + tiff_extra.strip_byte_counts_length], TIFF.IFDE_TYPE_LENGTH.LONG
.tag_117.common:
lodsd_
imul eax, [ebx + tiff_extra.strip_byte_counts_length]
cmp eax, 4
ja @f
mov [ebx + tiff_extra.strip_byte_counts], esi
lodsd
jmp .quit
@@:
lodsd_
add eax, [_data]
mov [ebx + tiff_extra.strip_byte_counts], eax
jmp .quit
.tag_13d: ; Predictor
cmp ax, TIFF.IFDE_TYPE.SHORT
jne @f
lodsd
xor eax, eax
lodsw_
mov [ebx + tiff_extra.predictor], eax
lodsw
@@:
jmp .quit
.tag_140: ; ColorMap
lodsd
lodsd_
add eax, [_data]
mov [ebx + tiff_extra.palette], eax
jmp .quit
.tag_152: ; ExtraSamples
mov [ebx + tiff_extra.extra_samples], esi
mov ecx, [ebx + tiff_extra.extra_samples_number]
rep lodsw ; ignored
jmp .quit
.quit:
pop edi edx ebx
ret
endp
proc tiff._.define_image_type
xor eax, eax
cmp [ebx + tiff_extra.photometric], TIFF.PHOTOMETRIC.RGB
jne .not_full_color
mov eax, -3
add eax, [ebx + tiff_extra.samples_per_pixel]
mov [ebx + tiff_extra.extra_samples_number], eax
dec eax
jns @f
mov eax, Image.bpp24
jmp .quit
@@:
dec eax
jns @f
mov eax, Image.bpp32
; mov [ebx + tiff_extra.extra_samples_number], 0
jmp .quit
@@:
.not_full_color: ; grayscale, indexed, bilevel
cmp [ebx + tiff_extra.bits_per_sample], 1
jg .not_bilevel
mov eax, Image.bpp1
jmp .quit
.not_bilevel: ; grayscale, indexed
cmp [ebx + tiff_extra.palette], 0
je .without_palette
cmp [ebx + tiff_extra.bits_per_sample], 4
jne @f
; mov eax, Image.bpp4
jmp .quit
@@:
cmp [ebx + tiff_extra.bits_per_sample], 8
jne @f
mov eax, Image.bpp8i
jmp .quit
@@:
jmp .quit
.without_palette: ; grayscale
mov eax, -1
add eax, [ebx + tiff_extra.samples_per_pixel]
mov [ebx + tiff_extra.extra_samples_number], eax
dec eax
jns @f
mov eax, Image.bpp8g
jmp .quit
@@:
mov eax, Image.bpp8a
jmp .quit
.quit:
ret
endp
proc tiff._.decompress.uncompressed _image
rep movsb
ret
endp
proc tiff._.decompress.packbits _image
push ebx ecx edx esi
mov edx, ecx
.decode:
lodsb
dec edx
cmp al, 0x7f
jbe .different
cmp al, 0x80
jne .identical
test edx, edx
jz .quit
jmp .decode
.identical:
neg al
inc al
movzx ecx, al
dec edx
lodsb
rep stosb
test edx, edx
jnz .decode
jmp .quit
.different:
movzx ecx, al
inc ecx
sub edx, ecx
rep movsb
test edx, edx
jnz .decode
.quit:
pop esi edx ecx ebx
ret
endp
proc tiff._.decompress.ccitt1d _image
locals
current_tree rd 1
old_tree rd 1
width rd 1
height rd 1
width_left rd 1
is_makeup rd 1
endl
push ebx ecx edx esi
mov [is_makeup], 0
mov ebx, [_image]
push [ebx + Image.Height]
pop [height]
push [ebx + Image.Width]
pop [width]
mov edx, esi
.next_scanline:
push [width]
pop [width_left]
dec [height]
js .error
mov [current_tree], tiff._.huffman_tree_white.begin
mov [old_tree], tiff._.huffman_tree_black.begin
mov ebx, 0
mov ecx, 8
.next_run:
mov esi, [current_tree]
.branch:
lodsd
btr eax, 31
jnc .not_a_leaf
cmp eax, 63
seta byte[is_makeup]
ja @f
push [current_tree]
push [old_tree]
pop [current_tree]
pop [old_tree]
@@:
stdcall tiff._.write_run, [width_left], [current_tree]
mov [width_left], eax
test byte[is_makeup], 0x01
jnz .next_run
test eax, eax
jnz .next_run
jmp .next_scanline
.not_a_leaf:
test bh, bh
jnz @f
mov bl, byte[edx]
inc edx
mov bh, 8
@@:
test al, 0x02
jz .not_a_corner
dec bh
sal bl, 1
lahf
and ah, 0x03
cmp al, ah
jne .error
mov esi, [esi]
jmp .branch
.not_a_corner:
lodsd
dec bh
sal bl, 1
jc .branch
mov esi, eax
jmp .branch
.error:
.quit:
pop esi edx ecx ebx
ret
endp
proc tiff._.decompress.lzw _image
locals
cur_shift rd 1 ; 9 -- 12
shift_counter rd 1 ; how many shifts of current length remained
bits_left rd 1 ; in current byte ( pointed to by [esi] )
table rd 1
table_size rd 1 ; the number of entries
old_code rd 1
next_table_entry rd 1 ; where to place new entry
endl
push ebx ecx edx esi
mov [table], 0
mov [bits_left], 8
mov [cur_shift], 9
.begin:
; .getnextcode:
xor eax, eax
mov edx, [cur_shift]
lodsb
mov ecx, [bits_left]
mov ch, cl
neg cl
add cl, 8
shl al, cl
mov cl, ch
shl eax, cl
sub edx, [bits_left]
; second_byte
cmp edx, 8
je .enough_zero
jb .enough_nonzero
sub edx, 8
lodsb
shl eax, 8
jmp .third_byte
.enough_zero:
mov [bits_left], 8
lodsb
jmp .code_done
.enough_nonzero:
mov al, byte[esi]
neg edx
add edx, 8
mov ecx, edx
mov [bits_left], edx
shr eax, cl
jmp .code_done
.third_byte:
mov al, byte[esi]
neg edx
add edx, 8
mov ecx, edx
mov [bits_left], edx
shr eax, cl
.code_done:
mov ebx, eax
cmp ebx, 0x101 ; end of information
je .quit
cmp ebx, 0x100 ; clear code
jne .no_clear_code
cmp [table], 0
jne @f
invoke mem.alloc, 256 + 63488 ; 256 + (2^8 + 2^9 + 2^10 + 2^11 + 2^12)*(4+4)
test eax, eax
jz .quit
mov [table], eax
@@:
mov eax, [table]
mov [next_table_entry], eax
add [next_table_entry], 256 + (256*8) + 2*8
mov [cur_shift], 9
mov [shift_counter], 256-3 ; clear code, end of information, why -3?
mov [table_size], 257
push edi
mov ecx, 256
mov edi, [table]
mov ebx, edi
add edi, 256
mov eax, 0
@@:
mov byte[ebx], al
mov [edi], ebx
add edi, 4
add ebx, 1
add eax, 1
mov [edi], dword 1
add edi, 4
dec ecx
jnz @b
pop edi
; .getnextcode:
xor eax, eax
mov edx, [cur_shift]
lodsb
mov ecx, [bits_left]
mov ch, cl
neg cl
add cl, 8
shl al, cl
mov cl, ch
shl eax, cl
sub edx, [bits_left]
; second_byte
cmp edx, 8
je .enough_zero2
jb .enough_nonzero2
sub edx, 8
lodsb
shl eax, 8
jmp .third_byte2
.enough_zero2:
mov [bits_left], 8
lodsb
jmp .code_done2
.enough_nonzero2:
mov al, byte[esi]
neg edx
add edx, 8
mov ecx, edx
mov [bits_left], edx
shr eax, cl
jmp .code_done2
.third_byte2:
mov al, byte[esi]
neg edx
add edx, 8
mov ecx, edx
mov [bits_left], edx
shr eax, cl
.code_done2:
mov [old_code], eax
cmp eax, 0x101 ; end of information
je .quit
push esi
mov esi, [table]
lea esi, [esi + eax*8 + 256]
mov ecx, dword[esi+4]
mov edx, [next_table_entry]
mov [edx], edi
lea eax, [ecx + 1]
mov [edx + 4], eax
add [next_table_entry], 8
mov esi, [esi]
rep movsb
pop esi
jmp .begin
.no_clear_code:
cmp eax, [table_size]
ja .not_in_table
mov [old_code], eax
push esi
mov esi, [table]
lea esi, [esi + eax*8 + 256]
mov ecx, dword[esi + 4]
mov edx, [next_table_entry]
mov [edx], edi
lea eax, [ecx + 1]
mov [edx + 4], eax
add [next_table_entry], 8
add [table_size], 1
mov esi, [esi]
rep movsb
pop esi
dec [shift_counter]
jnz @f
mov ecx, [cur_shift]
add [cur_shift], 1
mov edx, 1
shl edx, cl
mov [shift_counter], edx
@@:
jmp .begin
.not_in_table:
xchg eax, [old_code]
push esi
mov esi, [table]
lea esi, [esi + eax*8 + 256]
mov ecx, dword[esi+4]
mov edx, [next_table_entry]
mov [edx], edi
lea eax, [ecx + 2]
mov [edx + 4], eax
add [next_table_entry], 8
add [table_size], 1
mov esi, [esi]
mov al, [esi]
rep movsb
mov byte[edi], al
add edi, 1
pop esi
dec [shift_counter]
jnz @f
mov ecx, [cur_shift]
add [cur_shift], 1
mov edx, 1
shl edx, cl
mov [shift_counter], edx
@@:
jmp .begin
.quit:
cmp [table], 0
je @f
invoke mem.free, [table]
@@:
pop esi edx ecx ebx
ret
endp
proc tiff._.write_run _width_left, _current_tree
push ebx
test eax, eax
jz .done
sub [_width_left], eax
js .error
cmp esi, tiff._.huffman_tree_black.begin
seta bh
cmp ecx, eax
ja .one_byte
.many_bytes:
mov bl, [edi]
@@:
shl bl, 1
or bl, bh
dec eax
dec ecx
jnz @b
mov [edi], bl
inc edi
mov ecx, eax
and eax, 0x07
shr ecx, 3
push eax
xor eax, eax
test bh, bh
jz @f
dec al
@@:
rep stosb
pop eax
mov ecx, 8
test eax, eax
jz .done
.one_byte:
mov bl, [edi]
@@:
shl bl, 1
or bl, bh
dec ecx
dec eax
jnz @b
mov byte[edi], bl
cmp [_width_left], 0
jne .done
mov bl, [edi]
shl bl, cl
mov byte[edi], bl
inc edi
.done:
mov eax, [_width_left]
jmp .quit
.error:
.quit:
pop ebx
ret
endp
proc tiff._.get_word _endianness
lodsw
test [_endianness], 1
jnz @f
ret
@@:
xchg al, ah
ret
endp
proc tiff._.get_dword _endianness
lodsd
test [_endianness], 1
jnz @f
ret
@@:
bswap eax
ret
ret
endp
proc tiff._.pack_8a _img
mov ebx, [_img]
mov esi, [ebx + Image.Data]
mov edi, esi
mov ecx, [ebx + Image.Width]
imul ecx, [ebx + Image.Height]
@@:
lodsw
stosb
dec ecx
jnz @b
ret
endp
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;! Below is private data you should never use directly from your code ;;
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
tiff.IFDE_tag_table.begin:
.tag_100: dd 0x0100, tiff._.parse_IFDE.tag_100 ; image width
.tag_101: dd 0x0101, tiff._.parse_IFDE.tag_101 ; image height (this is called 'length' in spec)
.tag_102: dd 0x0102, tiff._.parse_IFDE.tag_102 ; bits per sample
.tag_103: dd 0x0103, tiff._.parse_IFDE.tag_103 ; compression
.tag_106: dd 0x0106, tiff._.parse_IFDE.tag_106 ; photometric interpretation
.tag_111: dd 0x0111, tiff._.parse_IFDE.tag_111 ; strip offsets
.tag_115: dd 0x0115, tiff._.parse_IFDE.tag_115 ; samples per pixel
.tag_116: dd 0x0116, tiff._.parse_IFDE.tag_116 ; rows per strip
.tag_117: dd 0x0117, tiff._.parse_IFDE.tag_117 ; strip byte counts
.tag_13d: dd 0x013d, tiff._.parse_IFDE.tag_13d ; predictor
.tag_140: dd 0x0140, tiff._.parse_IFDE.tag_140 ; color map
.tag_152: dd 0x0152, tiff._.parse_IFDE.tag_152 ; extra samples
tiff.IFDE_tag_table.end:
include 'huffman.asm' ; huffman trees for ccitt1d compression method
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