;;================================================================================================;;
;;//// bmp.asm //// (c) mike.dld, 2007-2008 //////////////////////////////////////////////////////;;
;;================================================================================================;;
;; ;;
;; 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 ;;
;; General Public License as published by the Free Software Foundation, either version 3 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 ;;
;; General Public License for more details. ;;
;; ;;
;; You should have received a copy of the GNU 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 ;//////////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? 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 ;;
;;================================================================================================;;
cmp [_length], 2
jb .nope
mov eax, [_data]
cmp word[eax], 'BM'
je .yep
.nope:
xor eax, eax
ret
.yep:
xor eax,eax
inc eax
ret
endp
;;================================================================================================;;
proc img.decode.bmp _data, _length ;//////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? 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
img dd ?
endl
push ebx
stdcall img.is.bmp, [_data], [_length]
or eax, eax
jz .error
mov ebx, [_data]
; cmp [ebx + bmp.Header.info.Compression], bmp.BI_RGB
; je @f
; mov eax, [ebx + bmp.Header.file.Size]
; cmp eax, [_length]
; jne .error
@@: stdcall img.create, [ebx + bmp.Header.info.Width], [ebx + bmp.Header.info.Height]
or eax, eax
jz .error
mov [img], eax
mov edx, eax
invoke mem.alloc, sizeof.bmp.Image
or eax, eax
jz .error
mov [edx + Image.Extended], eax
mov esi, ebx
add esi, sizeof.bmp.FileHeader
mov edi, eax
mov ecx, sizeof.bmp.InfoHeader
rep movsb
mov eax, [ebx + bmp.Header.info.Compression]
cmp eax, bmp.BI_RGB
jne @f
stdcall ._.rgb
jmp .decoded
@@: cmp eax, bmp.BI_RLE8
jne @f
stdcall ._.rle
jmp .decoded
@@: cmp eax, bmp.BI_RLE4
jne @f
stdcall ._.rle
jmp .decoded
@@: cmp eax, bmp.BI_BITFIELDS
jne @f
stdcall ._.bitfields
jmp .decoded
@@: 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
stdcall img.destroy, [img]
jmp .error
@@: stdcall img.flip, [img], FLIP_VERTICAL
mov eax, [img]
ret
.error:
xor eax, eax
pop ebx
ret
endp
;;================================================================================================;;
proc img.encode.bmp _img, _p_length ;/////////////////////////////////////////////////////////////;;
;;------------------------------------------------------------------------------------------------;;
;? 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
mov edi, [edx + Image.Data]
movzx eax, [ebx + bmp.Header.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 esi, ebx
add esi, [ebx + bmp.Header.file.OffBits]
mov ecx, [ebx + bmp.Header.info.Height]
.next_line:
push ecx
mov ecx, [ebx + bmp.Header.info.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 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 esi, ebx
add esi, [ebx + bmp.Header.file.OffBits]
mov ecx, [ebx + bmp.Header.info.Height]
.next_line:
push ecx
mov ecx, [ebx + bmp.Header.info.Width]
.next_line_dword:
lodsb
and eax, 0x000000FF
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
stosd
dec ecx
jnz .next_line_dword
pop ecx
dec ecx
jnz .next_line
jmp img.decode.bmp._.rgb.exit
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.4bpp:
mov esi, ebx
add esi, [ebx + bmp.Header.file.OffBits]
mov ecx, [ebx + bmp.Header.info.Height]
.next_line:
push ecx
mov ecx, [ebx + bmp.Header.info.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 eax, 0x0000000F
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
stosd
dec dword[esp]
jz @f
dec ecx
jnz .next_pixel
@@: pop ecx
or ecx, ecx
jnz .next_line_dword
pop ecx
dec ecx
jnz .next_line
jmp img.decode.bmp._.rgb.exit
;;------------------------------------------------------------------------------------------------;;
img.decode.bmp._.rgb.1bpp:
mov esi, ebx
add esi, [ebx + bmp.Header.file.OffBits]
mov ecx, [ebx + bmp.Header.info.Height]
.next_line:
push ecx
mov ecx, [ebx + bmp.Header.info.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 eax, 0x00000001
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
stosd
dec dword[esp]
jz @f
dec ecx
jnz .next_pixel
@@: pop ecx
or ecx, ecx
jnz .next_line_dword
pop 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
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 ?
endl
mov edi, [edx + Image.Data]
mov [abs_mode_addr], .absolute_mode.rle8
mov [enc_mode_addr], .encoded_mode.rle8
cmp [ebx + bmp.Header.info.Compression], bmp.BI_RLE4
jne @f
mov [abs_mode_addr], .absolute_mode.rle4
mov [enc_mode_addr], .encoded_mode.rle4
@@: mov esi, ebx
add esi, [ebx + bmp.Header.file.OffBits]
mov eax, [edx + Image.Width]
shl eax, 2
mov [scanline_len], eax
xor eax, eax
mov [marker_x], eax
mov [marker_y], eax
.next_run:
xor eax, eax
lodsb
or al, al
jz .escape_mode
jmp [enc_mode_addr]
.escape_mode:
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
mov eax, [marker_x]
shl eax, 2
neg eax
add eax, [scanline_len]
add edi, eax
mov [marker_x], 0
inc [marker_y]
jmp .next_run
.offset_marker: ; 2: dx, dy
lodsb
mov edx, [marker_x]
add edx, eax
cmp edx, [ebx + bmp.Header.info.Width]
jae .exit
mov [marker_x], edx
shl eax, 2
add edi, eax
lodsb
and eax, 0x0FF
mov edx, [marker_y]
add edx, eax
cmp edx, [ebx + bmp.Header.info.Height]
jae .exit
mov [marker_y], edx
imul eax, [scanline_len]
add edi, eax
jmp .next_run
.encoded_mode.rle8: ; N: b1 * N
mov edx, eax
lodsb
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
@@: dec edx
js .fix_marker
stosd
inc [marker_x]
jmp @b
.absolute_mode.rle8: ; N: b1 .. bN
mov edx, eax
push eax
@@: dec edx
js @f
lodsb
and eax, 0x0FF
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
stosd
inc [marker_x]
jmp @b
@@: pop eax
test eax, 1
jz .fix_marker
inc esi
jmp .fix_marker
.encoded_mode.rle4: ; N: b1 * N
mov edx, eax
lodsb
mov ecx, eax
shr ecx, 4
mov ecx, [ebx + ecx * 4 + bmp.Header.info.Palette]
and eax, 0x00F
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
@@: dec edx
js .fix_marker
test edx, 1
jz .odd
mov [edi], ecx
add edi, 4
inc [marker_x]
jmp @b
.odd:
stosd
inc [marker_x]
jmp @b
.absolute_mode.rle4: ; N: b1 .. bN
mov edx, eax
push eax
@@: dec edx
js @f
lodsb
and eax, 0x0FF
mov ecx, eax
shr eax, 4
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
stosd
inc [marker_x]
dec edx
js @f
mov eax, ecx
and eax, 0x00F
mov eax, [ebx + eax * 4 + bmp.Header.info.Palette]
stosd
inc [marker_x]
jmp @b
@@: pop eax
and eax, 0x03
jz .fix_marker
cmp eax, 3
je .fix_marker
inc esi
jmp .fix_marker
.fix_marker:
mov eax, [marker_x]
@@: sub eax, [ebx + bmp.Header.info.Width]
jle .next_run
mov [marker_x], eax
inc [marker_y]
jmp @b
.exit:
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
push esi edi
mov esi, [edx + Image.Extended]
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]
mov esi, ebx
add esi, [ebx + bmp.Header.file.OffBits]
mov [delta], 4
movzx eax, [ebx + bmp.Header.info.BitCount]
cmp eax, 32
je @f
cmp eax, 16
jne .error
mov [delta], 2
;;------------------------------------------------------------------------------------------------;;
@@: 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 esi
ret
.error:
or eax, -1
pop edi esi
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
;;================================================================================================;;
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
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;! Below is private data you should never use directly from your code ;;
;;================================================================================================;;
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
;;================================================================================================;;
;