forked from KolibriOS/kolibrios
373 lines
12 KiB
NASM
373 lines
12 KiB
NASM
;;================================================================================================;;
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;;//// ico.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. "Icons in Win32" ;;
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;; by John Hornick, Microsoft Corporation ;;
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;; http://msdn2.microsoft.com/en-us/library/ms997538.aspx ;;
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;; ;;
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;;================================================================================================;;
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include 'ico_cur.inc'
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;;================================================================================================;;
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;;proc img.is.ico _data, _length ;////////////////////////////////////////////////////////////////;;
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img.is.ico:
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mov edx, 0x00010000 ; icon type = 1
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jmp @f
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img.is.cur:
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mov edx, 0x00020000 ; cursor type = 2
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@@:
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;;------------------------------------------------------------------------------------------------;;
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;? Determine if raw data could be decoded (is in ICO 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
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mov ecx, [esp+8]
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sub ecx, sizeof.ico.FileHeader
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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 dword [eax], edx ; Reserved & Type
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jne .nope
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; test 3: count must be non-zero
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movzx eax, [eax + ico.FileHeader.Count]
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test eax, eax
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jz .nope
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; test 4 (length of data): data must containt Count dir entries
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shl eax, 4
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sub ecx, eax
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jae .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.ico_cur _data, _length, _options ;////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Decode data into image if it contains correctly formed raw data in ICO/CUR 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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;> _options = options for decoding (e.g. background color) ;;
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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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count dd ?
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img dd ?
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main_img dd ?
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endl
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push ebx esi edi
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; img.is.ico has been already called by img.decode
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; stdcall img.is.ico, [_data], [_length]
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; or eax, eax
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; jz .error
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mov ebx, [_data]
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movzx eax, [ebx + ico.FileHeader.Count]
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mov [count], eax
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and [img], 0
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and [main_img], 0
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.loop:
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mov ecx, [ebx + sizeof.ico.FileHeader + ico.DirEntry.ByteSize]
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mov edx, [ebx + sizeof.ico.FileHeader + ico.DirEntry.ImageOffset]
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mov eax, [_length]
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sub eax, edx
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jb .skip
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cmp eax, ecx
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jb .skip
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cmp ecx, 12 ; length test, see img.is.bmp
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jb .skip
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add edx, [_data]
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push [_options]
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push ecx
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push edx
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call img.decode.ico._.decode_icon_data
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test eax, eax
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jz .skip
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push 0xFFFFFF ; set bgr to white if no given
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mov edx, [_options]
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test edx, edx
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jz @f
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cmp [edx + ImageDecodeOptions.UsedSize], ImageDecodeOptions.BackgroundColor + 4
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jb @f
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add esp, 4
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push [edx + ImageDecodeOptions.BackgroundColor]
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@@:
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call img.decode.ico._.decode_icon_mask
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test eax, eax
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jz .skip
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mov edx, [img]
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test edx, edx
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jz .first
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mov [edx + Image.Next], eax
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mov [eax + Image.Previous], edx
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jmp @f
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.first:
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mov [main_img], eax
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@@:
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mov [img], eax
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.skip:
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add ebx, sizeof.ico.DirEntry
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dec [count]
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jnz .loop
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mov eax, [main_img]
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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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img.encode.cur:
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proc img.encode.ico _img, _p_length, _options ;///////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Encode image into raw data in ICO 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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img.decode.ico._.decode_icon_data:
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; create stack frame and jump to common BMP+ICO code
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push ebp
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mov ebp, esp
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sub esp, 12
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mov byte [ebp - 3], 1 ; bIsIco
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jmp img.decode.bmp.common
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img.decode.ico._.decode_icon_mask:
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mov edx, [eax + Image.Width]
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add edx, 31
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shr edx, 3
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and edx, not 3
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push edx
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imul edx, [eax + Image.Height]
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cmp ecx, edx
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pop edx
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jb .error.free
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mov edi, [eax + Image.Data]
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push ebp ebx eax
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xor ebp, ebp
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mov ebx, [eax + Image.Extended]
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cmp [ebx + bmp.Image.info.Height], 0
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js @f
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push edx
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imul edx, [eax + Image.Height]
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add esi, edx
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pop edx
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lea ebp, [edx+edx]
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sub esi, edx
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@@:
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mov ebx, [eax + Image.Height]
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mov ecx, [eax + Image.Width]
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; for now, BMP code produces only 8 and 32 bpp images
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cmp [eax + Image.Type], Image.bpp8i
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jz .bpp8
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.bpp32:
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mov edx, [esp+16] ; get background color
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.bpp32.extloop:
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push ecx
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.bpp32.innloop:
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lodsd
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bswap eax
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push 32
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.bpp32.dwordloop:
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add eax, eax
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jnc @f
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mov [edi], edx
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@@:
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add edi, 4
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dec ecx
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jz @f
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dec dword [esp]
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jnz .bpp32.dwordloop
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@@:
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pop eax
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test ecx, ecx
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jnz .bpp32.innloop
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sub esi, ebp
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pop ecx
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dec ebx
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jnz .bpp32.extloop
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pop eax ebx ebp
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ret 4
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.bpp8:
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push edi
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mov edi, [eax + Image.Palette]
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mov eax, [esp+20] ; get background color
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; if palette already has index for bgr color, use it
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push ecx
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mov ecx, 256
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repnz scasd
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jnz .bpp8.notfound
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not cl ; cl = index
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pop edx
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pop edi
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.bpp8.extloop:
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push edx
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.bpp8.innloop:
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lodsd
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bswap eax
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push 32
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.bpp8.dwordloop:
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add eax, eax
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jnc @f
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mov [edi], cl
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@@:
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inc edi
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dec edx
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jz @f
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dec dword [esp]
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jnz .bpp8.dwordloop
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@@:
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pop eax
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test edx, edx
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jnz .bpp8.innloop
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sub esi, ebp
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pop edx
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dec ebx
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jnz .bpp8.extloop
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pop eax ebx ebp
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ret 4
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.bpp8.notfound:
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; get maximum used color; if index < 255, then we can add one color to palette
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pop ecx
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pop edi
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pop eax
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mov edx, [eax + Image.Width]
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imul edx, ebx
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mov edi, [eax + Image.Data]
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xor ecx, ecx
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.bpp8.scanloop:
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cmp [edi], cl
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jb @f
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mov cl, [edi]
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@@:
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inc edi
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dec edx
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jnz .bpp8.scanloop
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inc cl
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jz .bpp8.nospace
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mov edx, [esp+8]
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mov edi, [eax + Image.Palette]
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mov [edi+ecx*4], edx ; set palette color
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mov edi, [eax + Image.Data]
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mov edx, [eax + Image.Width]
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push eax
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jmp .bpp8.extloop
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.bpp8.nospace:
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; convert to 24 bpp
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mov edx, [eax + Image.Width]
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imul edx, ebx
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lea edx, [edx*3]
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push eax
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invoke mem.alloc, edx
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mov edi, eax
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pop eax
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test edi, edi
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jz .error.free2
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push eax esi edi
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mov esi, eax
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call img._.do_rgb
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pop edi esi eax
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xchg edi, [eax + Image.Data]
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mov byte [eax + Image.Type], Image.bpp24
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push eax
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invoke mem.free, edi
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pop eax
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push eax
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mov ecx, [eax + Image.Width]
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mov edi, [eax + Image.Data]
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.bpp24:
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mov edx, [esp+16] ; get background color
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.bpp24.extloop:
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push ecx
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.bpp24.innloop:
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lodsd
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bswap eax
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push 32
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.bpp24.dwordloop:
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add eax, eax
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jnc @f
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mov [edi], dx
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ror edx, 16
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mov [edi+2], dl
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ror edx, 16
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@@:
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add edi, 3
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dec ecx
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jz @f
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dec dword [esp]
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jnz .bpp24.dwordloop
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@@:
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pop eax
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test ecx, ecx
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jnz .bpp24.innloop
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sub esi, ebp
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pop ecx
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dec ebx
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jnz .bpp24.extloop
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pop eax ebx ebp
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ret 4
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.error.free2:
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pop ebx ebp
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.error.free:
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stdcall img._.delete, eax
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xor eax, eax
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ret 4
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;;================================================================================================;;
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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;! Below is private data you should never use directly from your code ;;
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;;================================================================================================;;
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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;
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