;;================================================================================================;;
;;//// bmp.asm //// (c) mike.dld, 2007-2008, (c) diamond, 2009 ///////////////////////////////////;;
;;================================================================================================;;
;; ;;
;; 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/>. ;;
;; ;;
;;================================================================================================;;
;; ;;
;; References: ;;
;; 1. "Microsoft Windows Bitmap File Format Summary" ;;
;; from "Encyclopedia of Graphics File Formats" by O'Reilly ;;
;; http://www.fileformat.info/format/bmp/ ;;
;; ;;
;;================================================================================================;;
include 'bmp.inc'
;;================================================================================================;;
;;proc img.is.bmp _data, _length ;////////////////////////////////////////////////////////////////;;
img.is.bmp:
;;------------------------------------------------------------------------------------------------;;
;? Determine if raw data could be decoded (is in BMP format) ;;
;;------------------------------------------------------------------------------------------------;;
;> _data = raw data as read from file/stream ;;
;> _length = data length ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = false / true ;;
;;================================================================================================;;
; test 1 (length of data): data must contain FileHeader and required fields from InfoHeader
cmp dword [esp+8], sizeof.bmp.FileHeader + 12
jb .nope
; test 2: signature
mov eax, [esp+4]
cmp word [eax], 'BM'
je .yep
.nope:
xor eax, eax
ret 8
.yep:
xor eax, eax
inc eax
ret 8
;endp
;;================================================================================================;;
proc img.decode.bmp _data, _length, _options ;////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Decode data into image if it contains correctly formed raw data in BMP format ;;
;;------------------------------------------------------------------------------------------------;;
;> _data = raw data as read from file/stream ;;
;> _length = data length ;;
;;------------------------------------------------------------------------------------------------;;
;< eax = 0 (error) or pointer to image ;;
;;================================================================================================;;
locals
length_rest dd ?
img dd ?
bTopDown db ?
bIsIco db ?
endl
img.decode.bmp.length_rest equ length_rest
mov [bIsIco], 0
.common: ; common place for BMP and ICO
push ebx esi edi
mov ebx, [_data]
cmp [bIsIco], 0
jnz @f
add ebx, sizeof.bmp.FileHeader
sub [_length], sizeof.bmp.FileHeader
@@:
mov eax, [ebx + bmp.InfoHeader.Size]
; sanity check: file length must be greater than size of headers
cmp [_length], eax
jbe .error
mov [bTopDown], 0
cmp eax, 12
jz .old1
cmp eax, 40
jz .normal
cmp eax, 56
jnz .error
; convert images with <= 8 bpp to 8bpp, other - to 32 bpp
.normal:
m2m eax, Image.bpp8
cmp byte [ebx + 14], 8 ; bit count
jbe @f
mov al, Image.bpp32
@@:
push eax
mov eax, [ebx + 8] ;[ebx + bmp.InfoHeader.Height]
test eax, eax
jns @f
inc [bTopDown]
neg eax
@@:
cmp [bIsIco], 0 ; for icons Height is two times larger than image height
jz @f
shr eax, 1
@@:
pushd eax
pushd [ebx + 4] ;[ebx + bmp.InfoHeader.Width]
jmp .create
.old1:
m2m eax, Image.bpp8
cmp byte [ebx + 10], 8 ; bit count
jbe @f
mov al, Image.bpp32
@@:
push eax
movsx eax, word [ebx + 6] ;[ebx + bmp.InfoHeader.OldHeight]
test eax, eax
jns @f
inc [bTopDown]
neg eax
@@:
cmp [bIsIco], 0 ; for icons Height is two times larger than image height
jz @f
shr eax, 1
@@:
push eax
movzx eax, word [ebx + 4] ;[ebx + bmp.InfoHeader.OldWidth]
push eax
.create:
call img.create
or eax, eax
jz .error
mov [img], eax
mov edx, eax
invoke mem.alloc, sizeof.bmp.Image
or eax, eax
jz .error.free
mov [edx + Image.Extended], eax
push eax
mov edi, eax
mov ecx, sizeof.bmp.Image/4
xor eax, eax
rep stosd
pop edi
push edi
mov esi, ebx
mov ecx, [ebx] ;[ebx + bmp.InfoHeader.Size]
cmp ecx, 12
jz .old2
rep movsb
jmp .decode
.old2:
movsd ; Size
movzx eax, word [esi] ; OldWidth -> Width
stosd
movsx eax, word [esi+2] ; OldHeight -> Height
stosd
lodsd ; skip OldWidth+OldHeight
movsd ; Planes+BitCount
.decode:
pop edi
cmp [bIsIco], 0
jnz @f
mov edi, [_length]
add edi, sizeof.bmp.FileHeader
mov esi, [ebx - sizeof.bmp.FileHeader + bmp.FileHeader.OffBits]
jmp .offset_calculated
@@:
xor esi, esi
mov cl, byte [edi + bmp.Image.info.BitCount]
cmp cl, 8
ja @f
inc esi
add cl, 2
shl esi, cl
@@:
add esi, [edi + bmp.Image.info.Size]
mov edi, [_length]
.offset_calculated:
sub edi, esi
jbe .error.free
add esi, [_data]
mov eax, [edx + Image.Extended]
mov eax, [eax + bmp.Image.info.Compression]
cmp eax, bmp.BI_RGB
jne @f
stdcall ._.rgb
jmp .decoded
@@: cmp eax, bmp.BI_RLE8
jne @f
cmp word [ebx + 14], 8 ;bmp.InfoHeader.BitCount
jnz .error.free
stdcall ._.rle
jmp .decoded
@@: cmp eax, bmp.BI_RLE4
jne @f
cmp word [ebx + 14], 4
jnz .error.free
stdcall ._.rle
jmp .decoded
@@: cmp eax, bmp.BI_BITFIELDS
jne .error.free
stdcall ._.bitfields
jmp .decoded
; BI_JPEG and BI_PNG constants are not valid values for BMP file,
; they are intended for WinAPI
; @@: cmp eax, bmp.BI_JPEG
; jne @f
; stdcall ._.jpeg
; jmp .decoded
; @@: cmp eax, bmp.BI_PNG
; jne .error
; stdcall ._.png
.decoded:
or eax, eax
jz @f
.error.free:
stdcall img.destroy, [img]
jmp .error
@@:
cmp [bTopDown], 0
jnz @f
stdcall img.flip, [img], FLIP_VERTICAL
@@:
mov eax, [img]
mov ecx, [length_rest] ; return length for ICO code
cmp [bIsIco], 0
jz @f
mov [esp + 4], esi ; return pointer to end-of-data for ICO code
@@:
pop edi esi ebx
ret
.error:
xor eax, eax
pop edi esi ebx
ret
endp
;;================================================================================================;;
proc img.encode.bmp _img, _p_length, _options ;///////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? Encode image into raw data in BMP 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 img.decode.bmp._.rgb ;///////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> ebx = raw image data ;;
;> edx = image data ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
mov ecx, [edx + Image.Extended]
mov [ecx + bmp.Image.info.AlphaMask], 0
movzx eax, [ecx + bmp.Image.info.BitCount]
cmp eax, 32
je .32bpp
cmp eax, 24
je .24bpp
cmp eax, 16
je .16bpp
cmp eax, 8
je .8bpp
cmp eax, 4
je .4bpp
cmp eax, 1
je .1bpp
jmp .error
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.32bpp:
mov [ecx + bmp.Image.info.RedMask], 00000000111111110000000000000000b ; 8-0-0
mov [ecx + bmp.Image.info.GreenMask], 00000000000000001111111100000000b ; 0-8-0
mov [ecx + bmp.Image.info.BlueMask], 00000000000000000000000011111111b ; 0-0-8
stdcall img.decode.bmp._.bitfields
ret
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.24bpp:
mov eax, [edx + Image.Width]
lea eax, [eax*3 + 3]
and eax, not 3
mov ecx, [edx + Image.Height]
imul eax, ecx
sub edi, eax
jb img.decode.bmp._.rgb.error
mov [img.decode.bmp.length_rest], edi
mov edi, [edx + Image.Data]
.next_line:
push ecx edx
mov ecx, [edx + Image.Width]
xor edx, edx
.next_line_pixel:
movsd
dec esi
inc edx
dec ecx
jnz .next_line_pixel
and edx, 0x03
add esi, edx
pop edx ecx
dec ecx
jnz .next_line
jmp img.decode.bmp._.rgb.exit
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.16bpp:
mov [ecx + bmp.Image.info.RedMask], 00000000000000000111110000000000b ; 5-0-0
mov [ecx + bmp.Image.info.GreenMask], 00000000000000000000001111100000b ; 0-5-0
mov [ecx + bmp.Image.info.BlueMask], 00000000000000000000000000011111b ; 0-0-5
stdcall img.decode.bmp._.bitfields
ret
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.8bpp:
mov eax, [edx + Image.Width]
add eax, 3
call img.decode.bmp._.rgb.prepare_palette
jc img.decode.bmp._.rgb.error
.next_line:
push ecx
mov ecx, [edx + Image.Width]
mov eax, ecx
neg eax
and eax, 3
rep movsb
add esi, eax
pop ecx
dec ecx
jnz .next_line
jmp img.decode.bmp._.rgb.exit
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.4bpp:
mov eax, [edx + Image.Width]
add eax, 7
shr eax, 1
call img.decode.bmp._.rgb.prepare_palette
jc img.decode.bmp._.rgb.error
.next_line:
push ecx edx
mov ecx, [edx + Image.Width]
.next_line_dword:
push ecx
lodsd
bswap eax
xchg edx, eax
mov ecx, 32 / 4
.next_pixel:
rol edx, 4
mov al, dl
and al, 0x0000000F
stosb
dec dword[esp]
jz @f
dec ecx
jnz .next_pixel
@@: pop ecx
or ecx, ecx
jnz .next_line_dword
pop edx ecx
dec ecx
jnz .next_line
jmp img.decode.bmp._.rgb.exit
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.1bpp:
mov eax, [edx + Image.Width]
add eax, 31
shr eax, 3
call img.decode.bmp._.rgb.prepare_palette
jc img.decode.bmp._.rgb.error
.next_line:
push ecx edx
mov ecx, [edx + Image.Width]
.next_line_dword:
push ecx
lodsd
bswap eax
xchg edx, eax
mov ecx, 32 / 1
.next_pixel:
rol edx, 1
mov al, dl
and al, 0x00000001
stosb
dec dword[esp]
jz @f
dec ecx
jnz .next_pixel
@@: pop ecx
or ecx, ecx
jnz .next_line_dword
pop edx ecx
dec ecx
jnz .next_line
jmp img.decode.bmp._.rgb.exit
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.exit:
xor eax, eax
ret
img.decode.bmp._.rgb.error:
or eax, -1
ret
img.decode.bmp._.rgb.prepare_palette:
and eax, not 3
mov ecx, [edx + Image.Height]
imul eax, ecx
sub edi, eax
jb .ret
mov [img.decode.bmp.length_rest], edi
push esi
sub esi, ebx
jc .ret.pop
sub esi, [ebx + bmp.InfoHeader.Size]
jc .ret.pop
mov eax, esi
mov edi, [edx + Image.Palette]
push ecx
mov ecx, 256
mov esi, [ebx + bmp.InfoHeader.Size]
cmp esi, 12
jz .old
shr eax, 2
add esi, ebx
cmp ecx, eax
jb @f
mov ecx, eax
@@:
rep movsd
jmp .common
.old:
add esi, ebx
@@:
movsd
dec esi
sub eax, 3
jbe @f
sub ecx, 1
jnz @b
@@:
.common:
pop ecx
mov edi, [edx + Image.Data]
clc
.ret.pop:
pop esi
.ret:
ret
endp
;;================================================================================================;;
proc img.decode.bmp._.rle ;///////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> ebx = raw image data ;;
;> edx = image data ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
locals
scanline_len dd ?
marker_x dd ?
marker_y dd ?
abs_mode_addr dd ?
enc_mode_addr dd ?
height dd ?
endl
mov [abs_mode_addr], .absolute_mode.rle8
mov [enc_mode_addr], .encoded_mode.rle8
cmp [ebx + bmp.InfoHeader.Compression], bmp.BI_RLE4
jne @f
mov [abs_mode_addr], .absolute_mode.rle4
mov [enc_mode_addr], .encoded_mode.rle4
@@:
push edi
xor eax, eax ; do not check file size in .prepare_palette
push ebp
mov ebp, [ebp] ; set parent stack frame
call img.decode.bmp._.rgb.prepare_palette
pop ebp
pop ecx ; ecx = rest bytes in file
jc .error
mov eax, [edx + Image.Width]
mov [scanline_len], eax
mov eax, [edx + Image.Height]
mov [height], eax
xor eax, eax
mov [marker_x], eax
mov [marker_y], eax
mov edi, [edx + Image.Data]
.next_run:
sub ecx, 1
jc .eof
xor eax, eax
lodsb
or al, al
jz .escape_mode
jmp [enc_mode_addr]
.escape_mode:
sub ecx, 1
jc .eof
lodsb
cmp al, 0
je .end_of_scanline
cmp al, 1
je .exit
cmp al, 2
je .offset_marker
jmp [abs_mode_addr]
.end_of_scanline: ; 0
sub edi, [marker_x]
add edi, [scanline_len]
mov [marker_x], 0
mov eax, [marker_y]
inc eax
mov [marker_y], eax
cmp eax, [height]
jb .next_run
jmp .exit
.offset_marker: ; 2: dx, dy
sub ecx, 2
jc .eof
lodsb
mov edx, [marker_x]
add edx, eax
cmp edx, [scanline_len]
jae .exit
mov [marker_x], edx
add edi, eax
lodsb
mov edx, [marker_y]
add edx, eax
cmp edx, [height]
jae .exit
mov [marker_y], edx
imul eax, [scanline_len]
add edi, eax
jmp .next_run
.encoded_mode.rle8: ; N: b1 * N
call .fix_marker
sub ecx, 1
jc .eof
lodsb
push ecx
mov ecx, edx
rep stosb
pop ecx
jmp .check_eoi
.absolute_mode.rle8: ; N: b1 .. bN
call .fix_marker
cmp ecx, edx
jae @f
mov edx, ecx
@@:
push ecx
mov ecx, edx
rep movsb
pop ecx
sub ecx, edx
jz .eof
test edx, 1
jz .check_eoi
sub ecx, 1
jc .eof
inc esi
.check_eoi:
mov eax, [marker_y]
cmp eax, [height]
jb .next_run
jmp .exit
.encoded_mode.rle4: ; N: b1 * N
call .fix_marker
sub ecx, 1
jc .eof
movzx eax, byte [esi]
inc esi
push ecx
mov ecx, eax
and eax, 0xF
shr ecx, 4
@@:
dec edx
js @f
mov [edi], cl
dec edx
js @f
mov [edi+1], al
add edi, 2
jmp @b
@@:
pop ecx
jmp .check_eoi
.absolute_mode.rle4: ; N: b1 .. bN
call .fix_marker
lea eax, [edx+1]
shr eax, 1
cmp ecx, eax
jbe @f
lea edx, [ecx*2]
@@:
push ecx edx
@@: dec edx
js @f
lodsb
mov cl, al
shr al, 4
and cl, 0xF
stosb
dec edx
js @f
mov [edi], cl
inc edi
jmp @b
@@: pop eax ecx
and eax, 0x03
jp .check_eoi
sub ecx, 1
jc .eof
inc esi
jmp .check_eoi
.fix_marker:
mov edx, eax
add eax, [marker_x]
mov [marker_x], eax
@@:
sub eax, [scanline_len]
jle @f
mov [marker_x], eax
push eax
mov eax, [marker_y]
inc eax
mov [marker_y], eax
cmp eax, [height]
pop eax
jb @b
sub edx, eax
@@:
retn
.exit:
.eof:
xor eax, eax
ret
.error:
or eax, -1
ret
endp
;;================================================================================================;;
proc img.decode.bmp._.bitfields ;/////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> ebx = raw image data ;;
;> edx = image data ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
locals
shift bmp.RgbByteQuad
unshift bmp.RgbByteQuad
mask bmp.RgbQuad
delta dd ?
endl
mov [delta], 4
mov eax, [edx + Image.Extended]
cmp [eax + bmp.Image.info.BitCount], 32
je @f
cmp [eax + bmp.Image.info.BitCount], 16
jne .error
mov [delta], 2
@@:
mov ecx, [edx + Image.Width]
imul ecx, [edx + Image.Height]
imul ecx, [delta]
sub edi, ecx
jb .error
mov ecx, [ebp] ; use parent stack frame
mov [ecx + img.decode.bmp.length_rest - ebp], edi ; !
push esi
mov esi, eax
mov ecx, [esi + bmp.Image.info.RedMask]
call .calc_shift
mov [shift.Red], al
mov [mask.Red], ecx
call .calc_unshift
mov [unshift.Red], al
mov ecx, [esi + bmp.Image.info.GreenMask]
call .calc_shift
mov [shift.Green], al
mov [unshift.Green], al
mov [mask.Green], ecx
call .calc_unshift
mov [unshift.Green], al
mov ecx, [esi + bmp.Image.info.BlueMask]
call .calc_shift
mov [shift.Blue], al
mov [unshift.Blue], al
mov [mask.Blue], ecx
call .calc_unshift
mov [unshift.Blue], al
mov ecx, [esi + bmp.Image.info.AlphaMask]
call .calc_shift
mov [shift.Alpha], al
mov [unshift.Alpha], al
mov [mask.Alpha], ecx
call .calc_unshift
mov [unshift.Alpha], al
mov edi, [edx + Image.Data]
pop esi
;;------------------------------------------------------------------------------------------------;;
mov ecx, [edx + Image.Height]
.next_line:
push ecx
mov ecx, [edx + Image.Width]
.next_pixel:
push ecx
mov eax, [esi]
mov cl, [shift.Blue]
shr eax, cl
and eax, [mask.Blue]
mov cl, [unshift.Blue]
shl eax, cl
stosb
mov eax, [esi]
mov cl, [shift.Green]
shr eax, cl
and eax, [mask.Green]
mov cl, [unshift.Green]
shl eax, cl
stosb
mov eax, [esi]
mov cl, [shift.Red]
shr eax, cl
and eax, [mask.Red]
mov cl, [unshift.Red]
shl eax, cl
stosb
mov eax, [esi]
mov cl, [shift.Alpha]
shr eax, cl
and eax, [mask.Alpha]
mov cl, [unshift.Alpha]
shl eax, cl
stosb
add esi, [delta]
pop ecx
dec ecx
jnz .next_pixel
pop ecx
dec ecx
jnz .next_line
;;------------------------------------------------------------------------------------------------;;
.exit:
xor eax, eax
pop edi
ret
.error:
or eax, -1
pop edi
ret
.calc_shift:
xor eax, eax
or ecx, ecx
jnz @f
retn
@@: test ecx, 1
jnz @f
.zz: shr ecx, 1
inc eax
jmp @b
@@: test ecx, 0100000000b
jnz .zz
retn
.calc_unshift:
xor eax, eax
or ecx, ecx
jnz @f
retn
@@: test ecx, 1
jz @f
shr ecx, 1
inc eax
jmp @b
@@: sub eax, 8
neg eax
retn
endp
if 0
;;================================================================================================;;
proc img.decode.bmp._.jpeg ;//////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> ebx = raw image data ;;
;> edx = image data ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
xor eax, eax
ret
endp
;;================================================================================================;;
proc img.decode.bmp._.png ;///////////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? --- TBD --- ;;
;;------------------------------------------------------------------------------------------------;;
;> ebx = raw image data ;;
;> edx = image data ;;
;;------------------------------------------------------------------------------------------------;;
;< --- TBD --- ;;
;;================================================================================================;;
xor eax, eax
ret
endp
end if
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;! Below is private data you should never use directly from your code ;;
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;