forked from KolibriOS/kolibrios
d7b0867c02
v.1.0 rс3 12.06.2011 git-svn-id: svn://kolibrios.org@1951 a494cfbc-eb01-0410-851d-a64ba20cac60
159 lines
4.7 KiB
PHP
159 lines
4.7 KiB
PHP
;*****************************************************************************
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; PNG to RAW convert plugin - for zSea image viewer
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; Copyright (c) 2008, 2009, Marat Zakiyanov aka Mario79, aka Mario
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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 Marat Zakiyanov ''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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deflate_callback:
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cmp [deflate_start_offset],1
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je @f
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mov [deflate_start_offset],1
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jmp .1
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@@:
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mov eax,[IDAT.pointer]
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add eax,[IDAT.size]
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mov ebx,[image_file]
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add ebx,[file_size]
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sub ebx,32
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cmp ebx,eax
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jbe @f
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mov [next_Chunk],eax
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call search_IDAT
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jmp .1
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@@:
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xor eax,eax
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mov [IDAT.size],eax
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mov [IDAT.pointer],eax
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.1:
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mov ecx, [esp+8]
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mov eax,[IDAT.size]
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mov [ecx], eax ;length
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mov eax,[IDAT.pointer] ; buffer
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ret 8
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;---------------------------------------------------------------------
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search_IHDR:
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mov [Chunk_pointer],IHDR_name
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call get_Chunk_data_pointer
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mov eax,[Chunk_pointer]
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cmp eax,0
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je .no_png_file
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mov [IHDR.pointer],eax
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mov ecx,[eax-8]
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call convert_NBO_to_PC
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mov [IHDR.size],ecx
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ret
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.no_png_file:
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add esp,4
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jmp no_png_file
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;---------------------------------------------------------------------
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search_PLTE:
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push eax ecx
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mov [Chunk_pointer],PLTE_name
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call get_Chunk_data_pointer
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mov eax,[Chunk_pointer]
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cmp eax,0
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je .no_png_file
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mov [PLTE.pointer],eax
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mov ecx,[eax-8]
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call convert_NBO_to_PC
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mov [PLTE.size],ecx
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pop ecx eax
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ret
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.no_png_file:
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add esp,12
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jmp no_png_file
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;---------------------------------------------------------------------
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search_IDAT:
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mov [Chunk_pointer],IDAT_name
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call get_Chunk_data_pointer
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mov eax,[Chunk_pointer]
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cmp eax,0
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je .no_IDAT_next
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mov [IDAT.pointer],eax
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mov ecx,[eax-8]
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call convert_NBO_to_PC
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mov [IDAT.size],ecx
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xor eax,eax
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ret
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.no_IDAT_next:
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; add esp,4
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; jmp no_png_file
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mov eax,1
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ret
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;---------------------------------------------------------------------
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search_IEND:
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mov [Chunk_pointer],IEND_name
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call get_Chunk_data_pointer
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mov eax,[Chunk_pointer]
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cmp eax,0
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je .no_png_file
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mov [IEND.pointer],eax
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mov ecx,[eax-8]
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call convert_NBO_to_PC
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mov [IEND.size],ecx
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ret
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.no_png_file:
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add esp,4
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jmp no_png_file
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;---------------------------------------------------------------------
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convert_NBO_to_PC: ;network byte order value to PC value
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push eax
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mov al,ch
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mov ah,cl
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shl eax,16
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shr ecx,16
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mov al,ch
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mov ah,cl
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mov ecx,eax
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pop eax
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ret
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;---------------------------------------------------------------------
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get_Chunk_data_pointer:
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pushad
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mov ebp,4
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; mov edi,[image_file]
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mov edi,[next_Chunk]
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mov edx,[image_file] ;edi
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add edx,[file_size]
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dec edi
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.search_Chunk:
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cmp edx,edi
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jbe .end
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mov esi,[Chunk_pointer]
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mov ecx,ebp
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inc edi
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mov ebx,edi
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cld
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rep cmpsb
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mov edi,ebx
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jne .search_Chunk
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add edi,ebp
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mov [Chunk_pointer],edi
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popad
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ret
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.end:
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mov [Chunk_pointer],0
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popad
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ret
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;--------------------------------------------------------------------- |