forked from KolibriOS/kolibrios
Ivan Baravy
ef860d6920
img.flip.layer fix for images of scanline width less than 4 bytes bmp: check for more InfoHeader types git-svn-id: svn://kolibrios.org@2691 a494cfbc-eb01-0410-851d-a64ba20cac60
935 lines
26 KiB
NASM
935 lines
26 KiB
NASM
;;================================================================================================;;
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;;//// bmp.asm //// (c) mike.dld, 2007-2008, (c) diamond, 2009 ///////////////////////////////////;;
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;;================================================================================================;;
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;; ;;
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;; This file is part of Common development libraries (Libs-Dev). ;;
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;; ;;
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;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;;
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;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;;
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;; of the License, or (at your option) any later version. ;;
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;; ;;
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;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;;
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;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;;
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;; Lesser General Public License for more details. ;;
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;; ;;
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;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;;
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;; If not, see <http://www.gnu.org/licenses/>. ;;
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;; ;;
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;;================================================================================================;;
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;; ;;
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;; References: ;;
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;; 1. "Microsoft Windows Bitmap File Format Summary" ;;
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;; from "Encyclopedia of Graphics File Formats" by O'Reilly ;;
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;; http://www.fileformat.info/format/bmp/ ;;
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;; ;;
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;;================================================================================================;;
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include 'bmp.inc'
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;;================================================================================================;;
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;;proc img.is.bmp _data, _length ;////////////////////////////////////////////////////////////////;;
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img.is.bmp:
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;;------------------------------------------------------------------------------------------------;;
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;? Determine if raw data could be decoded (is in BMP format) ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _data = raw data as read from file/stream ;;
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;> _length = data length ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = false / true ;;
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;;================================================================================================;;
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; test 1 (length of data): data must contain FileHeader and required fields from InfoHeader
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cmp dword [esp+8], sizeof.bmp.FileHeader + 12
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jb .nope
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; test 2: signature
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mov eax, [esp+4]
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cmp word [eax], 'BM'
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je .yep
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.nope:
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xor eax, eax
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ret 8
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.yep:
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xor eax, eax
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inc eax
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ret 8
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;endp
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;;================================================================================================;;
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proc img.decode.bmp _data, _length, _options ;////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Decode data into image if it contains correctly formed raw data in BMP format ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _data = raw data as read from file/stream ;;
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;> _length = data length ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 (error) or pointer to image ;;
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;;================================================================================================;;
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locals
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length_rest dd ?
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img dd ?
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bTopDown db ?
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bIsIco db ?
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endl
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img.decode.bmp.length_rest equ length_rest
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mov [bIsIco], 0
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.common: ; common place for BMP and ICO
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push ebx esi edi
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mov ebx, [_data]
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cmp [bIsIco], 0
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jnz @f
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add ebx, sizeof.bmp.FileHeader
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sub [_length], sizeof.bmp.FileHeader
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@@:
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mov eax, [ebx + bmp.InfoHeader.Size]
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; sanity check: file length must be greater than size of headers
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cmp [_length], eax
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jbe .error
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mov [bTopDown], 0
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cmp eax, 12 ; 0x0C
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jz .old1
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cmp eax, 40 ; 0x28
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jz .normal
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cmp eax, 56 ; 0x38
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je .normal
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cmp eax, 108 ; 0x6C
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jnz .error
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; convert images with <= 8 bpp to 8bpp, other - to 32 bpp
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.normal:
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m2m eax, Image.bpp8
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cmp byte [ebx + 14], 8 ; bit count
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jbe @f
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mov al, Image.bpp32
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@@:
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push eax
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mov eax, [ebx + 8] ;[ebx + bmp.InfoHeader.Height]
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test eax, eax
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jns @f
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inc [bTopDown]
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neg eax
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@@:
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cmp [bIsIco], 0 ; for icons Height is two times larger than image height
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jz @f
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shr eax, 1
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@@:
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pushd eax
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pushd [ebx + 4] ;[ebx + bmp.InfoHeader.Width]
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jmp .create
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.old1:
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m2m eax, Image.bpp8
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cmp byte [ebx + 10], 8 ; bit count
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jbe @f
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mov al, Image.bpp32
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@@:
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push eax
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movsx eax, word [ebx + 6] ;[ebx + bmp.InfoHeader.OldHeight]
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test eax, eax
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jns @f
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inc [bTopDown]
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neg eax
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@@:
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cmp [bIsIco], 0 ; for icons Height is two times larger than image height
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jz @f
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shr eax, 1
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@@:
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push eax
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movzx eax, word [ebx + 4] ;[ebx + bmp.InfoHeader.OldWidth]
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push eax
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.create:
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call img.create
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or eax, eax
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jz .error
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mov [img], eax
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mov edx, eax
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invoke mem.alloc, sizeof.bmp.Image
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or eax, eax
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jz .error.free
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mov [edx + Image.Extended], eax
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push eax
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mov edi, eax
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mov ecx, sizeof.bmp.Image/4
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xor eax, eax
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rep stosd
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pop edi
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push edi
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mov esi, ebx
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mov ecx, [ebx] ;[ebx + bmp.InfoHeader.Size]
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cmp ecx, 12
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jz .old2
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rep movsb
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jmp .decode
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.old2:
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movsd ; Size
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movzx eax, word [esi] ; OldWidth -> Width
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stosd
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movsx eax, word [esi+2] ; OldHeight -> Height
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stosd
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lodsd ; skip OldWidth+OldHeight
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movsd ; Planes+BitCount
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.decode:
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pop edi
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cmp [bIsIco], 0
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jnz @f
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mov edi, [_length]
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add edi, sizeof.bmp.FileHeader
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mov esi, [ebx - sizeof.bmp.FileHeader + bmp.FileHeader.OffBits]
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jmp .offset_calculated
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@@:
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xor esi, esi
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mov cl, byte [edi + bmp.Image.info.BitCount]
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cmp cl, 8
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ja @f
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inc esi
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add cl, 2
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shl esi, cl
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@@:
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add esi, [edi + bmp.Image.info.Size]
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mov edi, [_length]
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.offset_calculated:
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sub edi, esi
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jbe .error.free
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add esi, [_data]
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mov eax, [edx + Image.Extended]
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mov eax, [eax + bmp.Image.info.Compression]
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cmp eax, bmp.BI_RGB
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jne @f
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stdcall ._.rgb
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jmp .decoded
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@@: cmp eax, bmp.BI_RLE8
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jne @f
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cmp word [ebx + 14], 8 ;bmp.InfoHeader.BitCount
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jnz .error.free
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stdcall ._.rle
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jmp .decoded
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@@: cmp eax, bmp.BI_RLE4
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jne @f
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cmp word [ebx + 14], 4
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jnz .error.free
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stdcall ._.rle
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jmp .decoded
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@@: cmp eax, bmp.BI_BITFIELDS
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jne .error.free
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stdcall ._.bitfields
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jmp .decoded
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; BI_JPEG and BI_PNG constants are not valid values for BMP file,
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; they are intended for WinAPI
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; @@: cmp eax, bmp.BI_JPEG
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; jne @f
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; stdcall ._.jpeg
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; jmp .decoded
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; @@: cmp eax, bmp.BI_PNG
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; jne .error
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; stdcall ._.png
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.decoded:
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or eax, eax
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jz @f
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.error.free:
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stdcall img.destroy, [img]
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jmp .error
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@@:
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cmp [bTopDown], 0
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jnz @f
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stdcall img.flip, [img], FLIP_VERTICAL
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@@:
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mov eax, [img]
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mov ecx, [length_rest] ; return length for ICO code
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cmp [bIsIco], 0
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jz @f
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mov [esp + 4], esi ; return pointer to end-of-data for ICO code
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@@:
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pop edi esi ebx
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ret
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.error:
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xor eax, eax
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pop edi esi ebx
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ret
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endp
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;;================================================================================================;;
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proc img.encode.bmp _img, _p_length, _options ;///////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Encode image into raw data in BMP format ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _img = pointer to image ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 (error) or pointer to encoded data ;;
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;< _p_length = encoded data length ;;
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;;================================================================================================;;
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xor eax, eax
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ret
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endp
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;;================================================================================================;;
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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;! Below are private procs you should never call directly from your code ;;
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;;================================================================================================;;
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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;;================================================================================================;;
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proc img.decode.bmp._.rgb ;///////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;;------------------------------------------------------------------------------------------------;;
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;> ebx = raw image data ;;
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;> edx = image data ;;
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;;------------------------------------------------------------------------------------------------;;
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;< --- TBD --- ;;
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;;================================================================================================;;
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mov ecx, [edx + Image.Extended]
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mov [ecx + bmp.Image.info.AlphaMask], 0
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movzx eax, [ecx + bmp.Image.info.BitCount]
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cmp eax, 32
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je .32bpp
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cmp eax, 24
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je .24bpp
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cmp eax, 16
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je .16bpp
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cmp eax, 8
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je .8bpp
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cmp eax, 4
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je .4bpp
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cmp eax, 1
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je .1bpp
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jmp .error
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;;------------------------------------------------------------------------------------------------;;
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img.decode.bmp._.rgb.32bpp:
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mov [ecx + bmp.Image.info.RedMask], 00000000111111110000000000000000b ; 8-0-0
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mov [ecx + bmp.Image.info.GreenMask], 00000000000000001111111100000000b ; 0-8-0
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mov [ecx + bmp.Image.info.BlueMask], 00000000000000000000000011111111b ; 0-0-8
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stdcall img.decode.bmp._.bitfields
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ret
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;;------------------------------------------------------------------------------------------------;;
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img.decode.bmp._.rgb.24bpp:
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mov eax, [edx + Image.Width]
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lea eax, [eax*3 + 3]
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and eax, not 3
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mov ecx, [edx + Image.Height]
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imul eax, ecx
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sub edi, eax
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jb img.decode.bmp._.rgb.error
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mov [img.decode.bmp.length_rest], edi
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mov edi, [edx + Image.Data]
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.next_line:
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push ecx edx
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mov ecx, [edx + Image.Width]
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xor edx, edx
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.next_line_pixel:
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movsd
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dec esi
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inc edx
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dec ecx
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jnz .next_line_pixel
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and edx, 0x03
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add esi, edx
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pop edx ecx
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dec ecx
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jnz .next_line
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jmp img.decode.bmp._.rgb.exit
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;;------------------------------------------------------------------------------------------------;;
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img.decode.bmp._.rgb.16bpp:
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mov [ecx + bmp.Image.info.RedMask], 00000000000000000111110000000000b ; 5-0-0
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mov [ecx + bmp.Image.info.GreenMask], 00000000000000000000001111100000b ; 0-5-0
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mov [ecx + bmp.Image.info.BlueMask], 00000000000000000000000000011111b ; 0-0-5
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stdcall img.decode.bmp._.bitfields
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ret
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;;------------------------------------------------------------------------------------------------;;
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img.decode.bmp._.rgb.8bpp:
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mov eax, [edx + Image.Width]
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add eax, 3
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call img.decode.bmp._.rgb.prepare_palette
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jc img.decode.bmp._.rgb.error
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.next_line:
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push ecx
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mov ecx, [edx + Image.Width]
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mov eax, ecx
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neg eax
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and eax, 3
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rep movsb
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add esi, eax
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pop ecx
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dec ecx
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jnz .next_line
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jmp img.decode.bmp._.rgb.exit
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;;------------------------------------------------------------------------------------------------;;
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img.decode.bmp._.rgb.4bpp:
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mov eax, [edx + Image.Width]
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add eax, 7
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shr eax, 1
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call img.decode.bmp._.rgb.prepare_palette
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jc img.decode.bmp._.rgb.error
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.next_line:
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push ecx edx
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mov ecx, [edx + Image.Width]
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.next_line_dword:
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push ecx
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lodsd
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bswap eax
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xchg edx, eax
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mov ecx, 32 / 4
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.next_pixel:
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rol edx, 4
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mov al, dl
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and al, 0x0000000F
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stosb
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dec dword[esp]
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jz @f
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dec ecx
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jnz .next_pixel
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@@: pop ecx
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or ecx, ecx
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jnz .next_line_dword
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pop edx ecx
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dec ecx
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jnz .next_line
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jmp img.decode.bmp._.rgb.exit
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;;------------------------------------------------------------------------------------------------;;
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img.decode.bmp._.rgb.1bpp:
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mov eax, [edx + Image.Width]
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add eax, 31
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shr eax, 3
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call img.decode.bmp._.rgb.prepare_palette
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jc img.decode.bmp._.rgb.error
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.next_line:
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push ecx edx
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mov ecx, [edx + Image.Width]
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.next_line_dword:
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push ecx
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lodsd
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bswap eax
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xchg edx, eax
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mov ecx, 32 / 1
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.next_pixel:
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rol edx, 1
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mov al, dl
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and al, 0x00000001
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stosb
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dec dword[esp]
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jz @f
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dec ecx
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jnz .next_pixel
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@@: pop ecx
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or ecx, ecx
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jnz .next_line_dword
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pop edx ecx
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dec ecx
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jnz .next_line
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jmp img.decode.bmp._.rgb.exit
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;;------------------------------------------------------------------------------------------------;;
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img.decode.bmp._.rgb.exit:
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xor eax, eax
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ret
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img.decode.bmp._.rgb.error:
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or eax, -1
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ret
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img.decode.bmp._.rgb.prepare_palette:
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and eax, not 3
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mov ecx, [edx + Image.Height]
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imul eax, ecx
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sub edi, eax
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jb .ret
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mov [img.decode.bmp.length_rest], edi
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push esi
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sub esi, ebx
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jc .ret.pop
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sub esi, [ebx + bmp.InfoHeader.Size]
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jc .ret.pop
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mov eax, esi
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mov edi, [edx + Image.Palette]
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push ecx
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mov ecx, 256
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mov esi, [ebx + bmp.InfoHeader.Size]
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cmp esi, 12
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jz .old
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shr eax, 2
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add esi, ebx
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cmp ecx, eax
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jb @f
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mov ecx, eax
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@@:
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rep movsd
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jmp .common
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.old:
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add esi, ebx
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@@:
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movsd
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dec esi
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sub eax, 3
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jbe @f
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sub ecx, 1
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jnz @b
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@@:
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.common:
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pop ecx
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mov edi, [edx + Image.Data]
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clc
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.ret.pop:
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pop esi
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.ret:
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ret
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endp
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;;================================================================================================;;
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proc img.decode.bmp._.rle ;///////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;;------------------------------------------------------------------------------------------------;;
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;> ebx = raw image data ;;
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;> edx = image data ;;
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;;------------------------------------------------------------------------------------------------;;
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;< --- TBD --- ;;
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;;================================================================================================;;
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locals
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scanline_len dd ?
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marker_x dd ?
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marker_y dd ?
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abs_mode_addr dd ?
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enc_mode_addr dd ?
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height dd ?
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endl
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mov [abs_mode_addr], .absolute_mode.rle8
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mov [enc_mode_addr], .encoded_mode.rle8
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cmp [ebx + bmp.InfoHeader.Compression], bmp.BI_RLE4
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jne @f
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mov [abs_mode_addr], .absolute_mode.rle4
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mov [enc_mode_addr], .encoded_mode.rle4
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@@:
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push edi
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xor eax, eax ; do not check file size in .prepare_palette
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push ebp
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mov ebp, [ebp] ; set parent stack frame
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call img.decode.bmp._.rgb.prepare_palette
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pop ebp
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pop ecx ; ecx = rest bytes in file
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jc .error
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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 ;;
|
|
;;================================================================================================;;
|
|
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
|
|
;;================================================================================================;;
|
|
|
|
|
|
;
|