535 lines
12 KiB
NASM
535 lines
12 KiB
NASM
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;*****************************************************************************
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; GIF to RAW1 convert plugin - for zSea image viewer
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; Copyright (c) 2009, Evgeny Grechnikov aka Diamond
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; All rights reserved.
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;
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; Redistribution and use in source and binary forms, with or without
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; modification, are permitted provided that the following conditions are met:
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; * Redistributions of source code must retain the above copyright
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; notice, this list of conditions and the following disclaimer.
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; * Redistributions in binary form must reproduce the above copyright
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; notice, this list of conditions and the following disclaimer in the
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; documentation and/or other materials provided with the distribution.
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; * Neither the name of the <organization> nor the
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; names of its contributors may be used to endorse or promote products
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; derived from this software without specific prior written permission.
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;
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; THIS SOFTWARE IS PROVIDED BY Evgeny Grechnikov ''AS IS'' AND ANY
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; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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; DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
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; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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;*****************************************************************************
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; Based on gif_lite.inc (c) Ivuskin Andrey aka Willow and Diamond 2004-2007
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;*****************************************************************************
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; Some small changes (c) 2011 Marat Zakiyanov aka Mario79, aka Mario
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;*****************************************************************************
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format MS COFF
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public EXPORTS
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section '.flat' code readable align 16
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START:
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pushad
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mov eax,dword [esp+36]
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mov esi, [eax] ; esi -> GIF data
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mov ebp, [eax+12] ; ebp = file size
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xor ebx, ebx ; ebx -> list of images, not allocated yet
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call check_header_1
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jz ReadGIF
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ReadGIF.end:
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; general exit from the function
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xor eax, eax
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cmp ebx, eax
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jz .bad
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cmp dword [ebx+4], eax
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jnz ReadGIF.ret
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mov ecx, ebx
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push 68
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pop eax
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push 13
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pop ebx
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int 40h
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xor ebx, ebx
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.bad:
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inc eax ; bad image
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ReadGIF.ret:
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mov ecx, [esp+28]
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mov [ecx+4], ebx ; save RAW data ptr
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mov [ecx+8], eax ; save result
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popad
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ret 4
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ReadGIF.animated.ret:
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mov ebx, [ReadGIF.gifList]
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jmp ReadGIF.ret
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_null fix 0x1000
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ReadGIF:
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; allocate one page for list of images
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mov ecx, 0x1000
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push 68
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pop eax
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push 12
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pop ebx
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int 40h
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xchg eax, ebx
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test ebx, ebx
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jnz @f
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mov al, 2 ; no memory
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jmp .ret
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@@:
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mov dword[ebx],'RAW1'
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xor eax,eax
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mov [.globalColor],eax
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mov [.globalColorSize],eax
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mov [.curImageIndex],eax
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sub ebp,0xd
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jb .end
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movzx eax,word[esi+6]
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mov [ebx+8],eax
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movzx eax,word[esi+8]
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mov [ebx+12],eax
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mov cl,[esi+0xa]
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add esi,0xd
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test cl,cl
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jns .nextblock
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mov [.globalColor],esi
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push ebx
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call .Gif_skipmap
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mov [.globalColorSize],ebx
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pop ebx
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jb .end
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.nextblock:
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dec ebp
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js .end
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cmp byte[esi],0x21
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jne .noextblock
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inc esi
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cmp byte[esi],0xf9 ; Graphic Control Ext
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jne .no_gc
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sub ebp,7
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jc .end
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mov ecx,[ebx+4]
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shl ecx,4
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add ecx,ebx
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mov eax,[esi+3]
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mov [ecx+16+12],ax
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; test byte[esi+2],1
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; setnz byte[ecx+16+14]
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mov al,[esi+2]
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mov [ecx+16+14], al
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mov al,[esi+5]
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mov [ecx+16+15],al
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add esi,7
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jmp .nextblock
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.no_gc:
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inc esi
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xor eax,eax
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.block_skip:
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dec ebp
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js .end
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lodsb
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add esi,eax
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sub ebp,eax
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jc .end2
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test eax,eax
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jnz .block_skip
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jmp .nextblock
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.noextblock:
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cmp byte[esi],0x2c ; image beginning
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jne .end
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inc esi
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sub ebp,11
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jc .end2
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movzx ecx,word[esi+4] ; ecx = width
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jecxz .end2
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mov [.width],ecx
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movzx eax,word[esi+6] ; eax = height
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test eax,eax
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jz .end2
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push eax ecx
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imul ecx,eax
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cmp ecx,4000000h
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jb @f
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pop ecx eax
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.end2:
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jmp .end
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@@:
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push ebx
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push ecx
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add ecx,44+256*4
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push 68
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pop eax
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push 12
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pop ebx
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int 0x40
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pop ecx
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pop ebx
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test eax,eax
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jnz @f
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pop ecx ecx
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jmp .end2
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@@:
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xchg eax,edi
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inc dword[ebx+4]
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mov [edi+32],ecx ; size of pixels area
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mov byte[edi+20],44 ; pointer to palette
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mov byte[edi+24+1],4 ; size of palette=256*4
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mov dword[edi+28],44+256*4 ; pointer to RAW data
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pop ecx eax
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mov dword[edi], 'RAW ' ; signature
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mov dword[edi+4],ecx ; width
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mov dword[edi+8],eax ; height
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mov byte[edi+12],8 ; total pixel size
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mov byte[edi+16],8 ; 8 bits per component
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mov byte[edi+18],1 ; number of components
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mov eax,[ebx+4]
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shl eax,4
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add eax,ebx
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mov [eax],edi
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movzx ecx,word[esi]
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mov [eax+4],ecx
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movzx ecx,word[esi+2]
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mov [eax+8],ecx
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mov eax,[edi+32]
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mov [.img_end],eax
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inc eax
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mov [.row_end],eax
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and [.pass],0
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test byte[esi+8],40h
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jz @f
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mov ecx,[edi+4]
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mov [.row_end],ecx
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@@:
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mov cl,[esi+8]
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add esi,9
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add edi,44
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push edi
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test cl,cl
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js .uselocal
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push esi
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mov esi,[.globalColor]
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mov ecx,[.globalColorSize]
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call .swap_palette
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pop esi
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jmp .setPal
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.uselocal:
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push ebx
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call .Gif_skipmap
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jnc @f
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pop ebx
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pop edi
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jmp .end
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@@:
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sub esi,ebx
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mov ecx,ebx
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pop ebx
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call .swap_palette
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.setPal:
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movzx ecx,byte[esi]
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inc ecx
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mov [.codesize],ecx
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dec ecx
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inc esi
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mov edi,.gif_workarea
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xor eax,eax
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lodsb ; eax - block_count
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add eax,esi
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mov [.block_ofs],eax
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mov [.bit_count],8
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mov eax,1
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shl eax,cl
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mov [.CC],eax
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mov ecx,eax
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inc eax
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mov [.EOI],eax
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mov eax, _null shl 16
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.filltable:
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stosd
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inc eax
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loop .filltable
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pop edi
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add edi,256*4
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mov [.img_start],edi
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add [.img_end],edi
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add [.row_end],edi
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mov [.ebx],ebx
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.reinit:
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mov edx,[.EOI]
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inc edx
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push [.codesize]
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pop [.compsize]
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call .Gif_get_sym
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cmp eax,[.CC]
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je .reinit
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call .Gif_output
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.cycle:
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movzx ebx,ax
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call .Gif_get_sym
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cmp eax,edx
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jae .notintable
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cmp eax,[.CC]
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je .reinit
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cmp eax,[.EOI]
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je .unpend
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call .Gif_output
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.add:
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mov dword [.gif_workarea+edx*4],ebx
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cmp edx,0xFFF
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jae .cycle
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inc edx
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bsr ebx,edx
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cmp ebx,[.compsize]
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jne .noinc
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inc [.compsize]
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.noinc:
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jmp .cycle
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.notintable:
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push eax
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mov eax,ebx
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call .Gif_output
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push ebx
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movzx eax,bx
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call .Gif_output
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pop ebx eax
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jmp .add
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.unpend:
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mov ebx,[.ebx]
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add ebp,esi
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mov esi,[.block_ofs]
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sub ebp,esi
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jc .end2
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xor eax,eax
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@@:
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dec ebp
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js .end2
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lodsb
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test eax,eax
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jz @f
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sub ebp,eax
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jc .end2
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add esi,eax
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jmp @b
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@@:
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test ebp,ebp
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jz .end2
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cmp byte[esi],0x3b
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jz .end2
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; next image
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mov ecx,[ebx+4]
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cmp cl,0xFF
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jnz .noresize
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mov edx,ebx
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inc ecx
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inc ecx
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shl ecx,4
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push 68
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pop eax
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push 20
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pop ebx
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int 40h
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test eax,eax
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jnz @f
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mov ebx,edx
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jmp .end2
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@@:
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xchg ebx,eax
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.noresize:
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jmp .nextblock
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.Gif_skipmap:
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; in: ecx - image descriptor, esi - pointer to colormap
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; out: edi - pointer to area after colormap
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and ecx,111b ; color map size
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mov ebx,3*2
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shl ebx,cl
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add esi,ebx
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sub ebp,ebx
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ret
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.Gif_get_sym:
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mov ecx,[.compsize]
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push ecx
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xor eax,eax
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.shift:
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ror byte[esi],1
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rcr eax,1
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dec [.bit_count]
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jnz .loop1
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inc esi
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cmp esi,[.block_ofs]
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jb .noblock
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push eax
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xor eax,eax
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dec ebp
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js .dataend
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lodsb
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test eax,eax
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jnz .nextbl
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mov eax,[.EOI]
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sub esi,2
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add esp,8
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jmp .exx
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.nextbl:
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add eax,esi
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mov [.block_ofs],eax
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pop eax
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.noblock:
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mov [.bit_count],8
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.loop1:
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loop .shift
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pop ecx
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rol eax,cl
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.exx:
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xor ecx,ecx
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ret
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.dataend:
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pop eax eax
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mov ebx, [.ebx]
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jmp .end2
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.Gif_output:
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push esi eax edx
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mov edx,.gif_workarea
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.next:
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push word[edx+eax*4]
|
||
|
|
mov ax,word[edx+eax*4+2]
|
||
|
|
inc ecx
|
||
|
|
cmp ax,_null
|
||
|
|
jnz .next
|
||
|
|
shl ebx,16
|
||
|
|
mov bx,[esp]
|
||
|
|
.loop2:
|
||
|
|
pop ax
|
||
|
|
|
||
|
|
stosb
|
||
|
|
|
||
|
|
cmp edi,[.row_end]
|
||
|
|
jb .norowend
|
||
|
|
mov eax,[.width]
|
||
|
|
push eax
|
||
|
|
sub edi,eax
|
||
|
|
add eax,eax
|
||
|
|
cmp [.pass],3
|
||
|
|
jz @f
|
||
|
|
add eax,eax
|
||
|
|
cmp [.pass],2
|
||
|
|
jz @f
|
||
|
|
add eax,eax
|
||
|
|
@@:
|
||
|
|
add edi,eax
|
||
|
|
pop eax
|
||
|
|
cmp edi,[.img_end]
|
||
|
|
jb .nextrow
|
||
|
|
mov edi,[.img_start]
|
||
|
|
inc [.pass]
|
||
|
|
add edi,eax
|
||
|
|
cmp [.pass],3
|
||
|
|
jz @f
|
||
|
|
add edi,eax
|
||
|
|
cmp [.pass],2
|
||
|
|
jz @f
|
||
|
|
add edi,eax
|
||
|
|
add edi,eax
|
||
|
|
@@:
|
||
|
|
.nextrow:
|
||
|
|
add eax,edi
|
||
|
|
mov [.row_end],eax
|
||
|
|
xor eax,eax
|
||
|
|
.norowend:
|
||
|
|
|
||
|
|
loop .loop2
|
||
|
|
pop edx eax esi
|
||
|
|
ret
|
||
|
|
|
||
|
|
.swap_palette:
|
||
|
|
xor eax,eax
|
||
|
|
@@:
|
||
|
|
lodsb
|
||
|
|
mov ah,al
|
||
|
|
lodsb
|
||
|
|
shl eax,8
|
||
|
|
lodsb
|
||
|
|
stosd
|
||
|
|
sub ecx,3
|
||
|
|
jnz @b
|
||
|
|
ret
|
||
|
|
;---------------------------------------------------------------------
|
||
|
|
check_header_1:
|
||
|
|
and dword [eax+8], 0
|
||
|
|
cmp dword [eax+12], 6
|
||
|
|
jb .err
|
||
|
|
push eax
|
||
|
|
mov eax, [eax]
|
||
|
|
cmp dword [eax], 'GIF8'
|
||
|
|
jnz .errpop
|
||
|
|
cmp byte [eax+5], 'a'
|
||
|
|
jnz .errpop
|
||
|
|
cmp byte [eax+4], '7'
|
||
|
|
jz @f
|
||
|
|
cmp byte [eax+4], '9'
|
||
|
|
jnz .errpop
|
||
|
|
@@:
|
||
|
|
pop eax
|
||
|
|
ret
|
||
|
|
.errpop:
|
||
|
|
pop eax
|
||
|
|
.err:
|
||
|
|
inc dword [eax+8]
|
||
|
|
ret
|
||
|
|
;---------------------------------------------------------------------
|
||
|
|
check_header:
|
||
|
|
pushad
|
||
|
|
mov eax,dword [esp+36]
|
||
|
|
call check_header_1
|
||
|
|
popad
|
||
|
|
ret 4
|
||
|
|
;---------------------------------------------------------------------
|
||
|
|
Associations:
|
||
|
|
dd Associations.end - Associations
|
||
|
|
db 'GIF',0
|
||
|
|
.end:
|
||
|
|
db 0
|
||
|
|
;---------------------------------------------------------------------
|
||
|
|
align 4
|
||
|
|
EXPORTS:
|
||
|
|
dd szStart, START
|
||
|
|
dd szVersion, 0x00010002
|
||
|
|
dd szCheck, check_header
|
||
|
|
dd szAssoc, Associations
|
||
|
|
dd 0
|
||
|
|
|
||
|
|
szStart db 'START',0
|
||
|
|
szVersion db 'version',0
|
||
|
|
szCheck db 'Check_Header',0
|
||
|
|
szAssoc db 'Associations',0
|
||
|
|
|
||
|
|
section '.data' data readable writable align 16
|
||
|
|
ReadGIF.globalColor rd 1
|
||
|
|
ReadGIF.globalColorSize rd 1
|
||
|
|
ReadGIF.cur_info rd 1 ; image table pointer
|
||
|
|
ReadGIF.codesize rd 1
|
||
|
|
ReadGIF.compsize rd 1
|
||
|
|
ReadGIF.bit_count rd 1
|
||
|
|
ReadGIF.CC rd 1
|
||
|
|
ReadGIF.EOI rd 1
|
||
|
|
ReadGIF.block_ofs rd 1
|
||
|
|
ReadGIF.row_end rd 1
|
||
|
|
ReadGIF.img_end rd 1
|
||
|
|
ReadGIF.img_start rd 1
|
||
|
|
ReadGIF.pass rd 1
|
||
|
|
ReadGIF.width rd 1
|
||
|
|
ReadGIF.ebx rd 1
|
||
|
|
ReadGIF.gifList rd 1
|
||
|
|
ReadGIF.curImageIndex rd 1
|
||
|
|
ReadGIF.gif_workarea rb 16*1024
|