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dunkaist |
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;;================================================================================================;; |
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;;//// gif.asm //// (c) mike.dld, 2007-2008 //////////////////////////////////////////////////////;; |
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;;================================================================================================;; |
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;;//// Partial (c) by Willow, Diamond and HidnPlayr //////////////////////////////////////////////;; |
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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 . ;; |
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;; ;; |
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;;================================================================================================;; |
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;; ;; |
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;; References: ;; |
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;; 1. GIF LITE v3.0 (2004-2007) ;; |
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;; by Willow and Diamond ;; |
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;; svn://kolibrios.org/programs/media/gifview/trunk/gif_lite.inc ;; |
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;; 2. "GIF 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/gif/ ;; |
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;; 3. "LZW and GIF explained" (1987) ;; |
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;; by Steve Blackstock, IEEE ;; |
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;; http://www.cis.udel.edu/~amer/CISC651/lzw.and.gif.explained.html ;; |
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;; 4. "Graphics Interchange Format (tm)" (June 15, 1987) ;; |
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;; by CompuServe Incorporated ;; |
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;; http://examples.oreilly.de/english_examples/gff/CDROM/GFF/VENDSPEC/GIF/GIF87A.TXT ;; |
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;; 5. "Graphics Interchange Format (sm)" (July 31, 1990) ;; |
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;; by CompuServe Incorporated ;; |
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;; http://examples.oreilly.de/english_examples/gff/CDROM/GFF/VENDSPEC/GIF/GIF89A.TXT ;; |
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;; ;; |
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;;================================================================================================;; |
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include 'gif.inc' |
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;;================================================================================================;; |
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proc img.is.gif _data, _length ;//////////////////////////////////////////////////////////////////;; |
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;;------------------------------------------------------------------------------------------------;; |
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;? Determine if raw data could be decoded (is in GIF 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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cmp [_length], sizeof.gif.Header |
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jb .nope |
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mov eax, [_data] |
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cmp dword[eax], 'GIF8' |
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jne .nope |
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cmp word[eax + 4], '7a' |
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je .yep |
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cmp word[eax + 4], '9a' |
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je .yep |
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.nope: |
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xor eax, eax |
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ret |
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.yep: |
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xor eax, eax |
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inc eax |
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ret |
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endp |
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;;================================================================================================;; |
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proc img.decode.gif _data, _length, _options ;////////////////////////////////////////////////////;; |
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;;------------------------------------------------------------------------------------------------;; |
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;? Decode data into image if it contains correctly formed raw data in GIF 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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max_color dd ? |
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cur_color_table_size dd ? |
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transparent_color dd ? |
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background_color dd ? |
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options_bgr dd ? |
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prev_palette dd ? |
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aux_palette dd ? |
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img dd ? |
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prev_img_data dd ? |
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aux_img_data dd ? |
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aux_img_type dd ? |
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prev_num_colors dd ? |
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main_img dd ? |
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global_color_table dd ? |
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global_color_table_size dd ? |
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endl |
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img.decode.gif.main_img equ main_img |
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img.decode.gif.prev_img_data equ prev_img_data |
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img.decode.gif.transparent_color equ transparent_color |
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img.decode.gif.background_color equ background_color |
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img.decode.gif._length equ _length |
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img.decode.gif.prev_num_colors equ prev_num_colors |
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img.decode.gif.prev_palette equ prev_palette |
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img.decode.gif.max_color equ max_color |
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img.decode.gif._data equ _data |
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img.decode.gif.aux_img_data equ aux_img_data |
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img.decode.gif.aux_img_type equ aux_img_type |
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img.decode.gif.aux_palette equ aux_palette |
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img.decode.gif.options_bgr equ options_bgr |
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; offset of _length parameter for child functions with ebp-based frame |
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; child saved ebp, return address, 3 saved registers, 15 local variables |
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img.decode.gif._length_child equ _length + 4 + 4 + 4*3 + 4*15 |
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img.decode.gif.max_color_child equ ebp + 4 + 4 + 4*3 |
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img.decode.gif.cur_color_table_size_child equ ebp + 4 + 4 + 4*3 + 4 |
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push ebx esi edi |
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xor eax, eax |
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mov [img], eax |
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mov [main_img], eax |
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mov [prev_img_data], eax |
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mov [aux_img_data], eax |
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mov [aux_img_type], eax |
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mov [prev_palette], eax |
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mov [aux_palette], eax |
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; when no previous image is available, use background fill with 1-entry palette |
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inc eax |
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mov [prev_num_colors], eax |
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lea eax, [background_color] |
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mov [prev_palette], eax |
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; value for bgr color in transparent images |
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mov edx, 0xFFFFFF ; white bgr if no value given |
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mov ecx, [_options] |
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jecxz @f |
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cmp [ecx + ImageDecodeOptions.UsedSize], ImageDecodeOptions.BackgroundColor + 4 |
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jb @f |
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mov edx, [ecx + ImageDecodeOptions.BackgroundColor] |
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@@: |
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mov [options_bgr], edx |
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mov dword [eax], edx |
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; guard against incorrect gif files without any color tables |
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; "If no color table is available at |
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; all, the decoder is free to use a system color table or a table of its own. In |
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; that case, the decoder may use a color table with as many colors as its |
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; hardware is able to support; it is recommended that such a table have black and |
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; white as its first two entries, so that monochrome images can be rendered |
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; adequately." (c) official gif documentation |
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mov [global_color_table], gif_default_palette |
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mov [global_color_table_size], 2 |
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; img.is.gif is called by caller (img.decode) |
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; stdcall img.is.gif, [_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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sub [_length], sizeof.gif.Header |
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mov cl, [ebx + gif.Header.lsd.Packed] |
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add ebx, sizeof.gif.Header |
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; gif.LSD.Packed.GlobalColorTableFlag = 80h |
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; test cl, gif.LSD.Packed.GlobalColorTableFlag |
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; jz @f |
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test cl, cl |
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jns @f |
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mov [global_color_table], ebx |
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and cl, gif.LSD.Packed.SizeOfGlobalColorTableMask |
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; shr cl, gif.LSD.Packed.SizeOfGlobalColorTableShift ; here Shift = 0 |
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push 2 |
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pop eax |
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shl eax, cl |
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mov [global_color_table_size], eax |
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lea eax, [eax * 3] |
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sub [_length], eax |
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jbe .error ; there must be at least 1 additional byte after color table |
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movzx ecx, byte [ebx - sizeof.gif.Header + gif.Header.lsd.BackgroundColor] |
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lea ecx, [ecx*3] |
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mov ecx, [ebx + ecx] ; eax = xxBBGGRR, convert to Kolibri color |
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bswap ecx |
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shr ecx, 8 |
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mov [background_color], ecx |
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add ebx, eax |
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@@: |
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; @@: cmp byte[ebx + gif.Block.Introducer], gif.Block.Introducer.Extension |
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; jne .next_image |
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; cmp byte[ebx + gif.Extension.Label], gif.Extension.Label.Comment |
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; jne .error |
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; add ebx, sizeof.gif.Extension |
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; stdcall ._.skip_data |
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; mov ebx, eax |
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; jmp @b |
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.next_image: |
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stdcall img._.new |
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or eax, eax |
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jz .error |
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mov edx, [img] |
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mov [eax + Image.Previous], edx |
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push sizeof.gif.LogicalScreenDescriptor |
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pop ecx |
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test edx, edx |
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jz @f |
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mov [edx + Image.Next], eax |
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xor ecx, ecx |
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@@: |
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push eax |
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mov [eax + Image.Type], Image.bpp8i |
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add ecx, sizeof.gif.Image |
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invoke mem.alloc, ecx |
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pop edx |
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or eax, eax |
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jz .error2 |
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mov [edx + Image.Extended], eax |
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xor ecx, ecx |
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cmp [img], ecx |
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jnz @f |
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mov esi, [_data] |
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add esi, gif.Header.lsd |
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lea edi, [eax + sizeof.gif.Image] |
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mov cl, sizeof.gif.LogicalScreenDescriptor |
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rep movsb |
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mov [main_img], edx |
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@@: |
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mov [img], edx |
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stdcall ._.process_extensions |
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cmp al, gif.Block.Introducer.ImageDescriptor |
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jne .error |
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sub [_length], sizeof.gif.ImageDescriptor |
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jc .error |
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movzx eax, [ebx + gif.ImageDescriptor.Width] |
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movzx ecx, [ebx + gif.ImageDescriptor.Height] |
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push edx |
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stdcall img._.resize_data, [img], eax, ecx |
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pop edx |
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or eax, eax |
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jz .error |
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mov esi, ebx |
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mov edi, [edx + Image.Extended] |
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mov ecx, sizeof.gif.ImageDescriptor |
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rep movsb |
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mov edi, [edx + Image.Palette] |
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mov esi, [global_color_table] |
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mov ecx, [global_color_table_size] |
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test [ebx + gif.ImageDescriptor.Packed], gif.ID.Packed.LocalColorTableFlag |
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jz @f |
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lea esi, [ebx + sizeof.gif.ImageDescriptor] |
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mov cl, [ebx + gif.ImageDescriptor.Packed] |
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and cl, gif.ID.Packed.SizeOfLocalColorTableMask |
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; here Shift = 0 |
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; shr cl, gif.ID.Packed.SizeOfLocalColorTableShift |
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push 2 |
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pop eax |
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shl eax, cl |
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mov ecx, eax |
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lea eax, [eax*3] |
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add ebx, eax |
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sub [_length], eax |
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jbe .error ; because we load additional byte, check is 'jbe', not 'jc' |
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@@: |
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mov [cur_color_table_size], ecx |
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dec [cur_color_table_size] |
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@@: |
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lodsd |
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dec esi |
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bswap eax |
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dunkaist |
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mov al, 0xff ; opaque |
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ror eax, 8 |
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dunkaist |
278 |
stosd |
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loop @b |
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add ebx, sizeof.gif.ImageDescriptor |
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stdcall ._.process_image |
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push ebx |
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mov edx, [img] |
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push edx |
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stdcall ._.superimpose |
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pop edx |
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push edx |
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stdcall ._.dispose |
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pop edx |
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mov edx, [edx + Image.Previous] |
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test edx, edx |
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jz .nofreeprev |
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mov ebx, [edx + Image.Extended] |
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cmp [edx + Image.Delay], 0 |
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jnz .nofreeprev |
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mov esi, [prev_palette] |
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cmp esi, [edx + Image.Palette] |
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jnz @f |
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mov ecx, [prev_num_colors] |
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stdcall ._.alloc_aux_palette |
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test eax, eax |
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jz .nofreeprev |
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mov [prev_palette], eax |
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304 |
@@: |
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mov esi, [prev_img_data] |
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cmp esi, [edx + Image.Data] |
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jnz .noprevdata |
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push 1 |
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pop eax |
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cmp [edx + Image.Type], Image.bpp8i |
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jz @f |
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312 |
mov al, 3 |
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313 |
@@: |
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cmp [aux_img_type], eax |
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315 |
jb .resetaux |
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mov edi, [aux_img_data] |
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imul eax, [edx + Image.Width] |
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imul eax, [edx + Image.Height] |
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xchg eax, ecx |
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rep movsb |
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jmp .noprevdata |
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.resetaux: |
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mov [aux_img_type], eax |
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mov eax, [aux_img_data] |
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test eax, eax |
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326 |
jz @f |
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327 |
invoke mem.free, eax |
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328 |
@@: |
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329 |
xor eax, eax |
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xchg eax, [edx + Image.Data] |
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mov [aux_img_data], eax |
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.noprevdata: |
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cmp edx, [main_img] |
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jnz @f |
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335 |
mov eax, [edx + Image.Next] |
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336 |
mov [main_img], eax |
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337 |
mov esi, [eax + Image.Extended] |
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338 |
mov edi, [edx + Image.Extended] |
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339 |
mov [edx + Image.Extended], esi |
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340 |
mov [eax + Image.Extended], edi |
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push sizeof.gif.Image |
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342 |
pop ecx |
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343 |
rep movsb |
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344 |
@@: |
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stdcall img.destroy.layer, edx |
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.nofreeprev: |
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347 |
pop ebx |
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348 |
test ebx, ebx |
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349 |
jz .ret |
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350 |
jmp .next_image |
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351 |
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.error2: |
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mov [img], edx |
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354 |
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.error: |
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mov eax, [img] |
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test eax, eax |
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358 |
jz .ret |
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359 |
cmp [main_img], eax |
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360 |
jnz @f |
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361 |
and [main_img], 0 |
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362 |
@@: |
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363 |
stdcall img.destroy.layer, eax |
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.ret: |
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365 |
mov eax, [aux_img_data] |
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366 |
test eax, eax |
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367 |
jz @f |
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368 |
invoke mem.free, eax |
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369 |
@@: |
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370 |
mov eax, [aux_palette] |
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371 |
test eax, eax |
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372 |
jz @f |
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373 |
invoke mem.free, eax |
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374 |
@@: |
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375 |
mov eax, [main_img] |
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376 |
cmp [eax + Image.Next], 0 |
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377 |
jz @f |
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378 |
or [eax + Image.Flags], Image.IsAnimated |
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379 |
@@: |
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|
380 |
pop edi esi ebx |
|
|
381 |
ret |
|
|
382 |
endp |
|
|
383 |
|
|
|
384 |
;;================================================================================================;; |
|
|
385 |
proc img.encode.gif _img, _p_length ;/////////////////////////////////////////////////////////////;; |
|
|
386 |
;;------------------------------------------------------------------------------------------------;; |
|
|
387 |
;? Encode image into raw data in GIF format ;; |
|
|
388 |
;;------------------------------------------------------------------------------------------------;; |
|
|
389 |
;> _img = pointer to image ;; |
|
|
390 |
;;------------------------------------------------------------------------------------------------;; |
|
|
391 |
;< eax = 0 (error) or pointer to encoded data ;; |
|
|
392 |
;< _p_length = encoded data length ;; |
|
|
393 |
;;================================================================================================;; |
|
|
394 |
xor eax, eax |
|
|
395 |
ret |
|
|
396 |
endp |
|
|
397 |
|
|
|
398 |
|
|
|
399 |
;;================================================================================================;; |
|
|
400 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
|
|
401 |
;;================================================================================================;; |
|
|
402 |
;! Below are private procs you should never call directly from your code ;; |
|
|
403 |
;;================================================================================================;; |
|
|
404 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
|
|
405 |
;;================================================================================================;; |
|
|
406 |
|
|
|
407 |
|
|
|
408 |
;;================================================================================================;; |
|
|
409 |
proc img.decode.gif._.process_extensions ;////////////////////////////////////////////////////////;; |
|
|
410 |
;;------------------------------------------------------------------------------------------------;; |
|
|
411 |
;? --- TBD --- ;; |
|
|
412 |
;;------------------------------------------------------------------------------------------------;; |
|
|
413 |
;> ebx = raw image data ;; |
|
|
414 |
;> edx = image data ;; |
|
|
415 |
;;------------------------------------------------------------------------------------------------;; |
|
|
416 |
;< --- TBD --- ;; |
|
|
417 |
;;================================================================================================;; |
|
|
418 |
mov esi, ebx |
|
|
419 |
xor eax, eax |
|
|
420 |
mov [edx + Image.Delay], eax |
|
|
421 |
|
|
|
422 |
.next_block: |
|
|
423 |
dec [img.decode.gif._length] |
|
|
424 |
js .exit_err |
|
|
425 |
lodsb ; load gif.Block.Introducer |
|
|
426 |
cmp al, gif.Block.Introducer.Extension |
|
|
427 |
jne .exit |
|
|
428 |
|
|
|
429 |
.ext_block: |
|
|
430 |
dec [img.decode.gif._length] |
|
|
431 |
js .exit_err |
|
|
432 |
lodsb ; load gif.Extension.Label |
|
|
433 |
cmp al, gif.Extension.Label.GraphicsControl |
|
|
434 |
je .graphics_control_ext |
|
|
435 |
; cmp al, gif.Extension.Label.PlainText |
|
|
436 |
; je .plain_text_ext |
|
|
437 |
; cmp al, gif.Extension.Label.Comment |
|
|
438 |
; je .comment_ext |
|
|
439 |
; cmp al, gif.Extension.Label.Application |
|
|
440 |
; je .application_ext |
|
|
441 |
; skip all other extensions |
|
|
442 |
.skip_ext: |
|
|
443 |
dec [img.decode.gif._length] |
|
|
444 |
js .exit_err |
|
|
445 |
lodsb ; load BlockSize |
|
|
446 |
.1: |
|
|
447 |
test al, al |
|
|
448 |
jz .next_block |
|
|
449 |
sub [img.decode.gif._length], eax |
|
|
450 |
jc .exit_err |
|
|
451 |
add esi, eax |
|
|
452 |
jmp .skip_ext |
|
|
453 |
|
|
|
454 |
.graphics_control_ext: |
|
|
455 |
dec [img.decode.gif._length] |
|
|
456 |
js .exit_err |
|
|
457 |
lodsb ; load BlockSize; must be sizeof.gif.GraphicsControlExtension |
|
|
458 |
cmp al, sizeof.gif.GraphicsControlExtension |
|
|
459 |
jnz .1 |
|
|
460 |
sub [img.decode.gif._length], eax |
|
|
461 |
jc .exit_err |
|
|
462 |
push edi |
|
|
463 |
movzx edi, [esi + gif.GraphicsControlExtension.DelayTime] |
|
|
464 |
mov [edx + Image.Delay], edi |
|
|
465 |
mov edi, [edx + Image.Extended] |
|
|
466 |
add edi, gif.Image.gce |
|
|
467 |
mov ecx, eax |
|
|
468 |
rep movsb |
|
|
469 |
pop edi |
|
|
470 |
jmp .skip_ext |
|
|
471 |
|
|
|
472 |
.exit_err: |
|
|
473 |
xor eax, eax |
|
|
474 |
|
|
|
475 |
.exit: |
|
|
476 |
mov ebx, esi |
|
|
477 |
ret |
|
|
478 |
endp |
|
|
479 |
|
|
|
480 |
;;================================================================================================;; |
|
|
481 |
proc img.decode.gif._.process_image ;/////////////////////////////////////////////////////////////;; |
|
|
482 |
;;------------------------------------------------------------------------------------------------;; |
|
|
483 |
;? --- TBD --- ;; |
|
|
484 |
;;------------------------------------------------------------------------------------------------;; |
|
|
485 |
;> ebx = raw image data ;; |
|
|
486 |
;> edx = image data ;; |
|
|
487 |
;;------------------------------------------------------------------------------------------------;; |
|
|
488 |
;< --- TBD --- ;; |
|
|
489 |
;;================================================================================================;; |
|
|
490 |
locals |
|
|
491 |
width dd ? |
|
|
492 |
img_start dd ? |
|
|
493 |
img_end dd ? |
|
|
494 |
row_end dd ? |
|
|
495 |
pass dd ? |
|
|
496 |
codesize dd ? |
|
|
497 |
compsize dd ? |
|
|
498 |
workarea dd ? |
|
|
499 |
block_ofs dd ? |
|
|
500 |
bit_count dd ? |
|
|
501 |
CC dd ? |
|
|
502 |
EOI dd ? |
|
|
503 |
endl |
|
|
504 |
|
|
|
505 |
invoke mem.alloc, 16 * 1024 |
|
|
506 |
mov [workarea], eax |
|
|
507 |
or eax, eax |
|
|
508 |
jz .error |
|
|
509 |
|
|
|
510 |
mov ecx, [edx + Image.Width] |
|
|
511 |
mov [width], ecx |
|
|
512 |
mov eax, [edx + Image.Height] |
|
|
513 |
imul eax, ecx |
|
|
514 |
mov [img_end], eax |
|
|
515 |
inc eax |
|
|
516 |
mov [row_end], eax |
|
|
517 |
and [pass], 0 |
|
|
518 |
and dword [img.decode.gif.max_color_child], 0 |
|
|
519 |
mov eax, [edx + Image.Extended] |
|
|
520 |
test [eax + gif.Image.info.Packed], gif.ID.Packed.InterleaceFlag |
|
|
521 |
jz @f |
|
|
522 |
mov [row_end], ecx |
|
|
523 |
|
|
|
524 |
@@: mov esi, ebx |
|
|
525 |
mov edi, [edx + Image.Data] |
|
|
526 |
|
|
|
527 |
sub dword [img.decode.gif._length_child], 2 |
|
|
528 |
jc .error |
|
|
529 |
movzx ecx, byte[esi] |
|
|
530 |
inc esi |
|
|
531 |
cmp cl, 12 |
|
|
532 |
jae .error |
|
|
533 |
mov [codesize], ecx |
|
|
534 |
inc [codesize] |
|
|
535 |
xor eax, eax |
|
|
536 |
lodsb ; eax - block_count |
|
|
537 |
sub [img.decode.gif._length_child], eax |
|
|
538 |
jc .error |
|
|
539 |
add eax, esi |
|
|
540 |
push edi |
|
|
541 |
mov edi, [workarea] |
|
|
542 |
mov [block_ofs], eax |
|
|
543 |
mov [bit_count], 8 |
|
|
544 |
mov eax, 1 |
|
|
545 |
shl eax, cl |
|
|
546 |
mov [CC], eax |
|
|
547 |
mov ecx, eax |
|
|
548 |
inc eax |
|
|
549 |
mov [EOI], eax |
|
|
550 |
mov eax, gif.Null shl 16 |
|
|
551 |
.filltable: |
|
|
552 |
stosd |
|
|
553 |
inc eax |
|
|
554 |
loop .filltable |
|
|
555 |
pop edi |
|
|
556 |
mov [img_start], edi |
|
|
557 |
add [img_end], edi |
|
|
558 |
add [row_end], edi |
|
|
559 |
.reinit: |
|
|
560 |
mov edx, [EOI] |
|
|
561 |
inc edx |
|
|
562 |
push [codesize] |
|
|
563 |
pop [compsize] |
|
|
564 |
call .get_symbol |
|
|
565 |
cmp eax, [CC] |
|
|
566 |
je .reinit |
|
|
567 |
call .output |
|
|
568 |
.cycle: |
|
|
569 |
movzx ebx, ax |
|
|
570 |
call .get_symbol |
|
|
571 |
cmp eax, [EOI] |
|
|
572 |
je .end |
|
|
573 |
cmp eax, edx |
|
|
574 |
ja .error |
|
|
575 |
je .notintable |
|
|
576 |
cmp eax, [CC] |
|
|
577 |
je .reinit |
|
|
578 |
call .output |
|
|
579 |
.add: |
|
|
580 |
cmp edx, 0x00001000 |
|
|
581 |
jae .cycle |
|
|
582 |
mov ecx, [workarea] |
|
|
583 |
mov [ecx + edx * 4], ebx |
|
|
584 |
inc edx |
|
|
585 |
cmp edx, 0x1000 |
|
|
586 |
je .noinc |
|
|
587 |
bsr ebx, edx |
|
|
588 |
cmp ebx, [compsize] |
|
|
589 |
jne .noinc |
|
|
590 |
inc [compsize] |
|
|
591 |
.noinc: |
|
|
592 |
jmp .cycle |
|
|
593 |
.notintable: |
|
|
594 |
push eax |
|
|
595 |
mov eax, ebx |
|
|
596 |
call .output |
|
|
597 |
push ebx |
|
|
598 |
movzx eax, bx |
|
|
599 |
call .output |
|
|
600 |
pop ebx eax |
|
|
601 |
jmp .add |
|
|
602 |
.end: |
|
|
603 |
mov edi, [img_end] |
|
|
604 |
xor eax, eax |
|
|
605 |
|
|
|
606 |
.exit: |
|
|
607 |
cmp [workarea], 0 |
|
|
608 |
je @f |
|
|
609 |
invoke mem.free, [workarea] |
|
|
610 |
@@: |
|
|
611 |
mov ebx, [block_ofs] |
|
|
612 |
@@: |
|
|
613 |
dec [img.decode.gif._length_child] |
|
|
614 |
js @f |
|
|
615 |
movzx eax, byte [ebx] |
|
|
616 |
inc ebx |
|
|
617 |
test eax, eax |
|
|
618 |
jz .ret |
|
|
619 |
sub [img.decode.gif._length_child], eax |
|
|
620 |
jc @f |
|
|
621 |
add ebx, eax |
|
|
622 |
jmp @b |
|
|
623 |
|
|
|
624 |
.error: |
|
|
625 |
cmp [workarea], 0 |
|
|
626 |
je @f |
|
|
627 |
invoke mem.free, [workarea] |
|
|
628 |
@@: xor ebx, ebx |
|
|
629 |
.ret: |
|
|
630 |
ret |
|
|
631 |
|
|
|
632 |
;;------------------------------------------------------------------------------------------------;; |
|
|
633 |
|
|
|
634 |
img.decode.gif._.process_image.get_symbol: |
|
|
635 |
mov ecx, [compsize] |
|
|
636 |
push ecx |
|
|
637 |
xor eax, eax |
|
|
638 |
|
|
|
639 |
.shift: |
|
|
640 |
dec [bit_count] |
|
|
641 |
jns .loop1 |
|
|
642 |
inc esi |
|
|
643 |
cmp esi, [block_ofs] |
|
|
644 |
jb .noblock |
|
|
645 |
push eax |
|
|
646 |
xor eax, eax |
|
|
647 |
sub [img.decode.gif._length_child], 1 |
|
|
648 |
jc .error_eof |
|
|
649 |
lodsb |
|
|
650 |
test eax, eax |
|
|
651 |
jnz .nextbl |
|
|
652 |
.error_eof: |
|
|
653 |
add esp, 12 |
|
|
654 |
jmp img.decode.gif._.process_image.error |
|
|
655 |
|
|
|
656 |
.nextbl: |
|
|
657 |
sub [img.decode.gif._length_child], eax |
|
|
658 |
jc .error_eof |
|
|
659 |
add eax, esi |
|
|
660 |
mov [block_ofs], eax |
|
|
661 |
pop eax |
|
|
662 |
|
|
|
663 |
.noblock: |
|
|
664 |
mov [bit_count], 7 |
|
|
665 |
|
|
|
666 |
.loop1: |
|
|
667 |
ror byte[esi], 1 |
|
|
668 |
rcr eax,1 |
|
|
669 |
loop .shift |
|
|
670 |
pop ecx |
|
|
671 |
rol eax, cl |
|
|
672 |
|
|
|
673 |
.exit: |
|
|
674 |
xor ecx, ecx |
|
|
675 |
retn |
|
|
676 |
|
|
|
677 |
;;------------------------------------------------------------------------------------------------;; |
|
|
678 |
|
|
|
679 |
img.decode.gif._.process_image.output: |
|
|
680 |
push esi eax edx |
|
|
681 |
mov edx, [workarea] |
|
|
682 |
|
|
|
683 |
.next: |
|
|
684 |
pushw [edx + eax * 4] |
|
|
685 |
mov ax, [edx + eax * 4 + 2] |
|
|
686 |
inc ecx |
|
|
687 |
cmp ax, gif.Null |
|
|
688 |
jnz .next |
|
|
689 |
shl ebx, 16 |
|
|
690 |
mov bx, [esp] |
|
|
691 |
|
|
|
692 |
.loop2: |
|
|
693 |
pop ax |
|
|
694 |
cmp al, byte [img.decode.gif.cur_color_table_size_child] |
|
|
695 |
jbe @f ; guard against incorrect GIFs |
|
|
696 |
mov al, 0 |
|
|
697 |
@@: cmp al, byte [img.decode.gif.max_color_child] |
|
|
698 |
jbe @f |
|
|
699 |
mov [img.decode.gif.max_color_child], al |
|
|
700 |
@@: stosb |
|
|
701 |
|
|
|
702 |
cmp edi, [row_end] |
|
|
703 |
jb .norowend |
|
|
704 |
mov eax, [width] |
|
|
705 |
push eax |
|
|
706 |
sub edi, eax |
|
|
707 |
add eax, eax |
|
|
708 |
cmp [pass], 3 |
|
|
709 |
je @f |
|
|
710 |
add eax, eax |
|
|
711 |
cmp [pass], 2 |
|
|
712 |
je @f |
|
|
713 |
add eax, eax |
|
|
714 |
@@: add edi, eax |
|
|
715 |
pop eax |
|
|
716 |
cmp edi, [img_end] |
|
|
717 |
jb .nextrow |
|
|
718 |
mov edi, [img_start] |
|
|
719 |
inc [pass] |
|
|
720 |
cmp [pass], 4 |
|
|
721 |
je .done |
|
|
722 |
add edi, eax |
|
|
723 |
cmp [pass], 3 |
|
|
724 |
je @f |
|
|
725 |
add edi, eax |
|
|
726 |
cmp [pass], 2 |
|
|
727 |
je @f |
|
|
728 |
add edi, eax |
|
|
729 |
add edi, eax |
|
|
730 |
@@: |
|
|
731 |
|
|
|
732 |
.nextrow: |
|
|
733 |
add eax, edi |
|
|
734 |
mov [row_end], eax |
|
|
735 |
xor eax, eax |
|
|
736 |
|
|
|
737 |
.norowend: |
|
|
738 |
cmp edi, [img_end] |
|
|
739 |
jz .done |
|
|
740 |
loop .loop2 |
|
|
741 |
pop edx eax esi |
|
|
742 |
retn |
|
|
743 |
|
|
|
744 |
.done: |
|
|
745 |
lea esp, [esp+(ecx-1)*2] |
|
|
746 |
pop edx eax esi eax |
|
|
747 |
jmp img.decode.gif._.process_image.exit |
|
|
748 |
|
|
|
749 |
endp |
|
|
750 |
|
|
|
751 |
;;================================================================================================;; |
|
|
752 |
proc img.decode.gif._.is_logical_screen ;/////////////////////////////////////////////////////////;; |
|
|
753 |
;;------------------------------------------------------------------------------------------------;; |
|
|
754 |
;? Determines whether GIF image occupies the whole logical screen ;; |
|
|
755 |
;;------------------------------------------------------------------------------------------------;; |
|
|
756 |
;> eax = extended image data ;; |
|
|
757 |
;> ebx = main image ;; |
|
|
758 |
;;------------------------------------------------------------------------------------------------;; |
|
|
759 |
;< ZF set <=> image area equals logical screen ;; |
|
|
760 |
;;================================================================================================;; |
|
|
761 |
mov ebx, [ebx + Image.Extended] |
|
|
762 |
cmp [eax + gif.Image.info.Left], 0 |
|
|
763 |
jnz @f |
|
|
764 |
cmp [eax + gif.Image.info.Top], 0 |
|
|
765 |
jnz @f |
|
|
766 |
mov cx, [eax + gif.Image.info.Width] |
|
|
767 |
cmp cx, [ebx + sizeof.gif.Image + gif.LogicalScreenDescriptor.ScreenWidth] |
|
|
768 |
jnz @f |
|
|
769 |
mov cx, [eax + gif.Image.info.Height] |
|
|
770 |
cmp cx, [ebx + sizeof.gif.Image + gif.LogicalScreenDescriptor.ScreenHeight] |
|
|
771 |
@@: retn |
|
|
772 |
endp |
|
|
773 |
|
|
|
774 |
main_img equ img.decode.gif.main_img |
|
|
775 |
transparent_color equ img.decode.gif.transparent_color |
|
|
776 |
background_color equ img.decode.gif.background_color |
|
|
777 |
prev_num_colors equ img.decode.gif.prev_num_colors |
|
|
778 |
prev_palette equ img.decode.gif.prev_palette |
|
|
779 |
max_color equ img.decode.gif.max_color |
|
|
780 |
prev_img_data equ img.decode.gif.prev_img_data |
|
|
781 |
_data equ img.decode.gif._data |
|
|
782 |
aux_img_data equ img.decode.gif.aux_img_data |
|
|
783 |
aux_img_type equ img.decode.gif.aux_img_type |
|
|
784 |
aux_palette equ img.decode.gif.aux_palette |
|
|
785 |
|
|
|
786 |
;;================================================================================================;; |
|
|
787 |
proc img.decode.gif._.superimpose ;///////////////////////////////////////////////////////////////;; |
|
|
788 |
;;------------------------------------------------------------------------------------------------;; |
|
|
789 |
;? --- TBD --- ;; |
|
|
790 |
;;------------------------------------------------------------------------------------------------;; |
|
|
791 |
;> edx = image data ;; |
|
|
792 |
;;------------------------------------------------------------------------------------------------;; |
|
|
793 |
;< --- TBD --- ;; |
|
|
794 |
;;================================================================================================;; |
|
|
795 |
mov ebx, [main_img] |
|
|
796 |
mov eax, [edx + Image.Extended] |
|
|
797 |
or [transparent_color], -1 ; no transparent color |
|
|
798 |
test byte [eax + gif.Image.gce.Packed], 1 |
|
|
799 |
jz @f |
|
|
800 |
movzx ecx, byte [eax + gif.Image.gce.ColorIndex] |
|
|
801 |
mov [transparent_color], ecx |
|
|
802 |
cmp edx, ebx |
|
|
803 |
jnz .has_transparency |
|
|
804 |
shl ecx, 2 |
|
|
805 |
add ecx, [edx + Image.Palette] |
|
|
806 |
push eax |
|
|
807 |
mov eax, [img.decode.gif.options_bgr] |
|
|
808 |
mov dword [background_color], eax |
|
|
809 |
mov dword [ecx], eax |
|
|
810 |
pop eax |
|
|
811 |
@@: |
|
|
812 |
call img.decode.gif._.is_logical_screen |
|
|
813 |
jnz .has_transparency |
|
|
814 |
; image is not transparent, so keep it as is |
|
|
815 |
retn |
|
|
816 |
|
|
|
817 |
.has_transparency: |
|
|
818 |
; image has transparent areas, we must superimpose it on the previous |
|
|
819 |
mov ecx, [prev_num_colors] |
|
|
820 |
cmp ecx, 0x100 |
|
|
821 |
ja .superimpose_on_rgb |
|
|
822 |
; create common palette |
|
|
823 |
sub esp, 3FCh |
|
|
824 |
push eax |
|
|
825 |
mov edi, esp |
|
|
826 |
push ecx |
|
|
827 |
mov esi, [prev_palette] |
|
|
828 |
rep movsd |
|
|
829 |
pop ecx |
|
|
830 |
mov esi, [edx + Image.Palette] |
|
|
831 |
xor ebx, ebx |
|
|
832 |
mov edi, esp |
|
|
833 |
sub esp, 100h |
|
|
834 |
.create_palette_loop: |
|
|
835 |
push ecx |
|
|
836 |
lodsd |
|
|
837 |
cmp ebx, [transparent_color] |
|
|
838 |
jz .nochange |
|
|
839 |
cmp ebx, ecx |
|
|
840 |
jae @f |
|
|
841 |
cmp eax, [edi+ebx*4] |
|
|
842 |
jz .nochange |
|
|
843 |
@@: |
|
|
844 |
push edi |
|
|
845 |
repnz scasd |
|
|
846 |
pop edi |
|
|
847 |
jnz .increase_palette |
|
|
848 |
sub ecx, [esp] |
|
|
849 |
not ecx ; cl = index of new color in current palette |
|
|
850 |
jmp .palette_common |
|
|
851 |
.increase_palette: |
|
|
852 |
mov ecx, [esp] |
|
|
853 |
test ch, ch |
|
|
854 |
jnz .output_to_rgb |
|
|
855 |
inc dword [esp] |
|
|
856 |
mov [edi+ecx*4], eax |
|
|
857 |
jmp .palette_common |
|
|
858 |
.nochange: |
|
|
859 |
mov ecx, ebx |
|
|
860 |
.palette_common: |
|
|
861 |
mov [ebx+esp+4], cl |
|
|
862 |
pop ecx |
|
|
863 |
inc ebx |
|
|
864 |
cmp ebx, [max_color] |
|
|
865 |
jbe .create_palette_loop |
|
|
866 |
mov [max_color], ecx |
|
|
867 |
; if image occupies only part of logical screen, allocate memory for full logical screen |
|
|
868 |
mov ebx, [main_img] |
|
|
869 |
mov eax, [edx + Image.Extended] |
|
|
870 |
mov esi, [edx + Image.Data] |
|
|
871 |
call img.decode.gif._.is_logical_screen |
|
|
872 |
jz @f |
|
|
873 |
and [edx + Image.Data], 0 |
|
|
874 |
push edx |
|
|
875 |
movzx eax, [ebx + sizeof.gif.Image + gif.LogicalScreenDescriptor.ScreenHeight] |
|
|
876 |
push eax |
|
|
877 |
movzx eax, [ebx + sizeof.gif.Image + gif.LogicalScreenDescriptor.ScreenWidth] |
|
|
878 |
stdcall img._.resize_data, edx, eax |
|
|
879 |
pop edx |
|
|
880 |
test eax, eax |
|
|
881 |
jz .palette_nomem |
|
|
882 |
@@: |
|
|
883 |
; copy final palette to Image.Palette |
|
|
884 |
push esi esi |
|
|
885 |
mov esi, edi |
|
|
886 |
mov edi, [edx + Image.Palette] |
|
|
887 |
mov ecx, [max_color] |
|
|
888 |
dec [max_color] |
|
|
889 |
rep movsd |
|
|
890 |
mov esi, [prev_img_data] |
|
|
891 |
mov edi, [edx + Image.Data] |
|
|
892 |
; do superimpose, [esp] -> source data, esi -> prev image data |
|
|
893 |
; (NULL if previous image is filled with background color), esp+8 -> correspondence between |
|
|
894 |
; used palette and final palette, edi -> destination data |
|
|
895 |
mov ebx, [edx + Image.Extended] |
|
|
896 |
; first Top rows are copied from [prev_img_data] or filled with bgr |
|
|
897 |
movzx ecx, [ebx + gif.Image.info.Top] |
|
|
898 |
cmp ecx, [edx + Image.Height] |
|
|
899 |
jb @f |
|
|
900 |
mov ecx, [edx + Image.Height] |
|
|
901 |
@@: |
|
|
902 |
push ecx |
|
|
903 |
imul ecx, [edx + Image.Width] |
|
|
904 |
call .rep_movsb_or_stosb |
|
|
905 |
pop ecx |
|
|
906 |
; convert rows |
|
|
907 |
sub ecx, [edx + Image.Height] |
|
|
908 |
neg ecx |
|
|
909 |
push ecx |
|
|
910 |
cmp cx, [ebx + gif.Image.info.Height] |
|
|
911 |
jbe @f |
|
|
912 |
mov cx, [ebx + gif.Image.info.Height] |
|
|
913 |
@@: |
|
|
914 |
jecxz .norows |
|
|
915 |
.convert_rows: |
|
|
916 |
push ecx |
|
|
917 |
movzx ecx, [ebx + gif.Image.info.Left] |
|
|
918 |
cmp ecx, [edx + Image.Width] |
|
|
919 |
jb @f |
|
|
920 |
mov ecx, [edx + Image.Width] |
|
|
921 |
@@: |
|
|
922 |
push ecx |
|
|
923 |
call .rep_movsb_or_stosb |
|
|
924 |
pop ecx |
|
|
925 |
sub ecx, [edx + Image.Width] |
|
|
926 |
neg ecx |
|
|
927 |
push ecx edx |
|
|
928 |
mov edx, [esp+16] ; source data |
|
|
929 |
cmp cx, [ebx + gif.Image.info.Width] |
|
|
930 |
jbe @f |
|
|
931 |
mov cx, [ebx + gif.Image.info.Width] |
|
|
932 |
@@: |
|
|
933 |
jecxz .norowsi |
|
|
934 |
.rowsloop: |
|
|
935 |
movzx eax, byte [edx] |
|
|
936 |
inc edx |
|
|
937 |
cmp eax, [transparent_color] |
|
|
938 |
jz .rows_transparent |
|
|
939 |
mov al, [eax+esp+24] |
|
|
940 |
stosb |
|
|
941 |
call .lodsb |
|
|
942 |
jmp @f |
|
|
943 |
.rows_transparent: |
|
|
944 |
call .lodsb |
|
|
945 |
stosb |
|
|
946 |
@@: |
|
|
947 |
loop .rowsloop |
|
|
948 |
.norowsi: |
|
|
949 |
pop edx ecx |
|
|
950 |
sub cx, [ebx + gif.Image.info.Width] |
|
|
951 |
jbe @f |
|
|
952 |
call .rep_movsb_or_stosb |
|
|
953 |
@@: |
|
|
954 |
movzx eax, [ebx + gif.Image.info.Width] |
|
|
955 |
add [esp+8], eax |
|
|
956 |
pop ecx |
|
|
957 |
loop .convert_rows |
|
|
958 |
.norows: |
|
|
959 |
pop ecx |
|
|
960 |
sub cx, [ebx + gif.Image.info.Height] |
|
|
961 |
jbe @f |
|
|
962 |
imul ecx, [edx + Image.Width] |
|
|
963 |
call .rep_movsb_or_stosb |
|
|
964 |
@@: |
|
|
965 |
; free old image data if we have allocated new copy |
|
|
966 |
pop esi esi |
|
|
967 |
cmp esi, [edx + Image.Data] |
|
|
968 |
jz @f |
|
|
969 |
invoke mem.free, esi |
|
|
970 |
@@: |
|
|
971 |
; cleanup stack and return |
|
|
972 |
add esp, 500h |
|
|
973 |
retn |
|
|
974 |
.palette_nomem: |
|
|
975 |
mov [edx + Image.Data], esi |
|
|
976 |
jmp @b |
|
|
977 |
|
|
|
978 |
.output_to_rgb: |
|
|
979 |
pop ecx |
|
|
980 |
add esp, 500h |
|
|
981 |
; compose two palette-based images to one RGB image |
|
|
982 |
xor esi, esi |
|
|
983 |
xchg esi, [edx + Image.Data] |
|
|
984 |
push esi |
|
|
985 |
mov ebx, [_data] |
|
|
986 |
push [edx + Image.Palette] |
|
|
987 |
mov byte [edx + Image.Type], Image.bpp24 |
|
|
988 |
push edx |
|
|
989 |
movzx eax, [ebx + gif.Header.lsd.ScreenHeight] |
|
|
990 |
push eax |
|
|
991 |
movzx eax, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
992 |
stdcall img._.resize_data, edx, eax |
|
|
993 |
pop edx |
|
|
994 |
test eax, eax |
|
|
995 |
jz .convrgb_nomem |
|
|
996 |
push esi |
|
|
997 |
mov edi, [edx + Image.Data] |
|
|
998 |
mov esi, [prev_img_data] |
|
|
999 |
mov ebx, [edx + Image.Extended] |
|
|
1000 |
; first Top rows are copied from [prev_img_data] or filled with bgr |
|
|
1001 |
movzx ecx, [ebx + gif.Image.info.Top] |
|
|
1002 |
cmp ecx, [edx + Image.Height] |
|
|
1003 |
jb @f |
|
|
1004 |
mov ecx, [edx + Image.Height] |
|
|
1005 |
@@: |
|
|
1006 |
push ecx |
|
|
1007 |
imul ecx, [edx + Image.Width] |
|
|
1008 |
call .convrgb_prev |
|
|
1009 |
pop ecx |
|
|
1010 |
; convert rows |
|
|
1011 |
sub ecx, [edx + Image.Height] |
|
|
1012 |
neg ecx |
|
|
1013 |
push ecx |
|
|
1014 |
cmp cx, [ebx + gif.Image.info.Height] |
|
|
1015 |
jbe @f |
|
|
1016 |
mov cx, [ebx + gif.Image.info.Height] |
|
|
1017 |
@@: |
|
|
1018 |
jecxz .convrgb_norows |
|
|
1019 |
.convrgb_convert_rows: |
|
|
1020 |
push ecx |
|
|
1021 |
movzx ecx, [ebx + gif.Image.info.Left] |
|
|
1022 |
cmp ecx, [edx + Image.Width] |
|
|
1023 |
jb @f |
|
|
1024 |
mov ecx, [edx + Image.Width] |
|
|
1025 |
@@: |
|
|
1026 |
push ecx |
|
|
1027 |
call .convrgb_prev |
|
|
1028 |
pop ecx |
|
|
1029 |
sub ecx, [edx + Image.Width] |
|
|
1030 |
neg ecx |
|
|
1031 |
push ecx edx |
|
|
1032 |
mov edx, [esp+16] ; source data |
|
|
1033 |
cmp cx, [ebx + gif.Image.info.Width] |
|
|
1034 |
jbe @f |
|
|
1035 |
mov cx, [ebx + gif.Image.info.Width] |
|
|
1036 |
@@: |
|
|
1037 |
jecxz .convrgb_norowsi |
|
|
1038 |
.convrgb_rowsloop: |
|
|
1039 |
movzx eax, byte [edx] |
|
|
1040 |
inc edx |
|
|
1041 |
cmp eax, [transparent_color] |
|
|
1042 |
jz .convrgb_rows_transparent |
|
|
1043 |
shl eax, 2 |
|
|
1044 |
add eax, [esp+20] ; source palette |
|
|
1045 |
mov eax, [eax] |
|
|
1046 |
stosw |
|
|
1047 |
shr eax, 16 |
|
|
1048 |
stosb |
|
|
1049 |
call .convrgb_lodsb |
|
|
1050 |
jmp @f |
|
|
1051 |
.convrgb_rows_transparent: |
|
|
1052 |
call .convrgb_lodsb |
|
|
1053 |
stosw |
|
|
1054 |
shr eax, 16 |
|
|
1055 |
stosb |
|
|
1056 |
@@: |
|
|
1057 |
loop .convrgb_rowsloop |
|
|
1058 |
.convrgb_norowsi: |
|
|
1059 |
pop edx ecx |
|
|
1060 |
sub cx, [ebx + gif.Image.info.Width] |
|
|
1061 |
jbe @f |
|
|
1062 |
call .convrgb_prev |
|
|
1063 |
@@: |
|
|
1064 |
movzx eax, [ebx + gif.Image.info.Width] |
|
|
1065 |
add [esp+8], eax |
|
|
1066 |
pop ecx |
|
|
1067 |
loop .convrgb_convert_rows |
|
|
1068 |
.convrgb_norows: |
|
|
1069 |
pop ecx |
|
|
1070 |
sub cx, [ebx + gif.Image.info.Height] |
|
|
1071 |
jbe @f |
|
|
1072 |
imul ecx, [edx + Image.Width] |
|
|
1073 |
call .convrgb_prev |
|
|
1074 |
@@: |
|
|
1075 |
; free old image data |
|
|
1076 |
pop esi esi ;esi |
|
|
1077 |
invoke mem.free;, esi |
|
|
1078 |
retn |
|
|
1079 |
.convrgb_nomem: |
|
|
1080 |
pop esi esi |
|
|
1081 |
retn |
|
|
1082 |
|
|
|
1083 |
.superimpose_on_rgb: |
|
|
1084 |
; previous image is RGB, new image has transparent areas |
|
|
1085 |
xor esi, esi |
|
|
1086 |
xchg esi, [edx + Image.Data] |
|
|
1087 |
push esi |
|
|
1088 |
mov ebx, [_data] |
|
|
1089 |
push [edx + Image.Palette] |
|
|
1090 |
mov byte [edx + Image.Type], Image.bpp24 |
|
|
1091 |
push edx |
|
|
1092 |
movzx eax, [ebx + gif.Header.lsd.ScreenHeight] |
|
|
1093 |
push eax |
|
|
1094 |
movzx eax, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1095 |
stdcall img._.resize_data, edx, eax |
|
|
1096 |
pop edx |
|
|
1097 |
test eax, eax |
|
|
1098 |
jz .rgb_nomem |
|
|
1099 |
push esi |
|
|
1100 |
mov edi, [edx + Image.Data] |
|
|
1101 |
mov esi, [prev_img_data] |
|
|
1102 |
mov ebx, [edx + Image.Extended] |
|
|
1103 |
; first Top rows are copied from [prev_img_data] or filled with bgr |
|
|
1104 |
movzx ecx, [ebx + gif.Image.info.Top] |
|
|
1105 |
cmp ecx, [edx + Image.Height] |
|
|
1106 |
jb @f |
|
|
1107 |
mov ecx, [edx + Image.Height] |
|
|
1108 |
@@: |
|
|
1109 |
push ecx |
|
|
1110 |
lea ecx, [ecx*3] |
|
|
1111 |
imul ecx, [edx + Image.Width] |
|
|
1112 |
rep movsb |
|
|
1113 |
pop ecx |
|
|
1114 |
; convert rows |
|
|
1115 |
sub ecx, [edx + Image.Height] |
|
|
1116 |
neg ecx |
|
|
1117 |
push ecx |
|
|
1118 |
cmp cx, [ebx + gif.Image.info.Height] |
|
|
1119 |
jbe @f |
|
|
1120 |
mov cx, [ebx + gif.Image.info.Height] |
|
|
1121 |
@@: |
|
|
1122 |
jecxz .rgb_norows |
|
|
1123 |
.rgb_convert_rows: |
|
|
1124 |
push ecx |
|
|
1125 |
movzx ecx, [ebx + gif.Image.info.Left] |
|
|
1126 |
cmp ecx, [edx + Image.Width] |
|
|
1127 |
jb @f |
|
|
1128 |
mov ecx, [edx + Image.Width] |
|
|
1129 |
@@: |
|
|
1130 |
push ecx |
|
|
1131 |
lea ecx, [ecx*3] |
|
|
1132 |
rep movsb |
|
|
1133 |
pop ecx |
|
|
1134 |
sub ecx, [edx + Image.Width] |
|
|
1135 |
neg ecx |
|
|
1136 |
push ecx edx |
|
|
1137 |
mov edx, [esp+16] ; source data |
|
|
1138 |
cmp cx, [ebx + gif.Image.info.Width] |
|
|
1139 |
jbe @f |
|
|
1140 |
mov cx, [ebx + gif.Image.info.Width] |
|
|
1141 |
@@: |
|
|
1142 |
jecxz .rgb_norowsi |
|
|
1143 |
.rgb_rowsloop: |
|
|
1144 |
movzx eax, byte [edx] |
|
|
1145 |
inc edx |
|
|
1146 |
cmp eax, [transparent_color] |
|
|
1147 |
jz .rgb_rows_transparent |
|
|
1148 |
shl eax, 2 |
|
|
1149 |
add eax, [esp+20] ; source palette |
|
|
1150 |
mov eax, [eax] |
|
|
1151 |
stosw |
|
|
1152 |
shr eax, 16 |
|
|
1153 |
stosb |
|
|
1154 |
add esi, 3 |
|
|
1155 |
jmp @f |
|
|
1156 |
.rgb_rows_transparent: |
|
|
1157 |
movsb |
|
|
1158 |
movsb |
|
|
1159 |
movsb |
|
|
1160 |
@@: |
|
|
1161 |
loop .rgb_rowsloop |
|
|
1162 |
.rgb_norowsi: |
|
|
1163 |
pop edx ecx |
|
|
1164 |
sub cx, [ebx + gif.Image.info.Width] |
|
|
1165 |
jbe @f |
|
|
1166 |
lea ecx, [ecx*3] |
|
|
1167 |
rep movsb |
|
|
1168 |
@@: |
|
|
1169 |
movzx eax, [ebx + gif.Image.info.Width] |
|
|
1170 |
add [esp+8], eax |
|
|
1171 |
pop ecx |
|
|
1172 |
loop .rgb_convert_rows |
|
|
1173 |
.rgb_norows: |
|
|
1174 |
pop ecx |
|
|
1175 |
sub cx, [ebx + gif.Image.info.Height] |
|
|
1176 |
jbe @f |
|
|
1177 |
imul ecx, [edx + Image.Width] |
|
|
1178 |
lea ecx, [ecx*3] |
|
|
1179 |
rep movsb |
|
|
1180 |
@@: |
|
|
1181 |
; free old image data |
|
|
1182 |
pop esi esi ;esi |
|
|
1183 |
invoke mem.free;, esi |
|
|
1184 |
retn |
|
|
1185 |
.rgb_nomem: |
|
|
1186 |
pop esi esi |
|
|
1187 |
retn |
|
|
1188 |
|
|
|
1189 |
.lodsb: |
|
|
1190 |
xor eax, eax |
|
|
1191 |
test esi, esi |
|
|
1192 |
jz @f |
|
|
1193 |
lodsb |
|
|
1194 |
@@: retn |
|
|
1195 |
|
|
|
1196 |
.rep_movsb_or_stosb: |
|
|
1197 |
test esi, esi |
|
|
1198 |
jz .rmos1 |
|
|
1199 |
rep movsb |
|
|
1200 |
jmp .rmos2 |
|
|
1201 |
.rmos1: xor eax, eax ; background index in final palette is 0 in bgr mode |
|
|
1202 |
rep stosb |
|
|
1203 |
.rmos2: retn |
|
|
1204 |
|
|
|
1205 |
.convrgb_prev: |
|
|
1206 |
jecxz .convrgb_noprev |
|
|
1207 |
test esi, esi |
|
|
1208 |
jz .convrgb_prev_bgr |
|
|
1209 |
@@: |
|
|
1210 |
xor eax, eax |
|
|
1211 |
lodsb |
|
|
1212 |
shl eax, 2 |
|
|
1213 |
add eax, [prev_palette] |
|
|
1214 |
mov eax, [eax] |
|
|
1215 |
stosw |
|
|
1216 |
shr eax, 16 |
|
|
1217 |
stosb |
|
|
1218 |
loop @b |
|
|
1219 |
retn |
|
|
1220 |
.convrgb_prev_bgr: |
|
|
1221 |
@@: |
|
|
1222 |
mov eax, [background_color] |
|
|
1223 |
stosw |
|
|
1224 |
shr eax, 16 |
|
|
1225 |
stosb |
|
|
1226 |
loop @b |
|
|
1227 |
.convrgb_noprev: |
|
|
1228 |
retn |
|
|
1229 |
.convrgb_lodsb: |
|
|
1230 |
xor eax, eax |
|
|
1231 |
test esi, esi |
|
|
1232 |
jz @f |
|
|
1233 |
lodsb |
|
|
1234 |
shl eax, 2 |
|
|
1235 |
add eax, [prev_palette] |
|
|
1236 |
mov eax, [eax] |
|
|
1237 |
retn |
|
|
1238 |
@@: mov eax, [background_color] |
|
|
1239 |
retn |
|
|
1240 |
|
|
|
1241 |
endp |
|
|
1242 |
|
|
|
1243 |
;;================================================================================================;; |
|
|
1244 |
proc img.decode.gif._.dispose ;///////////////////////////////////////////////////////////////////;; |
|
|
1245 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1246 |
;? --- TBD --- ;; |
|
|
1247 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1248 |
;> edx = image data ;; |
|
|
1249 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1250 |
;< --- TBD --- ;; |
|
|
1251 |
;;================================================================================================;; |
|
|
1252 |
mov ebx, [edx + Image.Extended] |
|
|
1253 |
mov al, [ebx + gif.Image.gce.Packed] |
|
|
1254 |
shr al, 2 |
|
|
1255 |
and al, 7 |
|
|
1256 |
cmp al, 2 |
|
|
1257 |
jz .background |
|
|
1258 |
cmp al, 3 |
|
|
1259 |
jz .previous |
|
|
1260 |
; don't dispose - set prev_img and related vars to current image |
|
|
1261 |
mov eax, [edx + Image.Data] |
|
|
1262 |
mov [prev_img_data], eax |
|
|
1263 |
cmp [edx + Image.Type], Image.bpp8i |
|
|
1264 |
jnz @f |
|
|
1265 |
mov eax, [max_color] |
|
|
1266 |
inc eax |
|
|
1267 |
mov [prev_num_colors], eax |
|
|
1268 |
mov eax, [edx + Image.Palette] |
|
|
1269 |
mov [prev_palette], eax |
|
|
1270 |
retn |
|
|
1271 |
@@: |
|
|
1272 |
or [prev_num_colors], -1 |
|
|
1273 |
and [prev_palette], 0 |
|
|
1274 |
.previous: |
|
|
1275 |
retn |
|
|
1276 |
.background: |
|
|
1277 |
cmp [prev_img_data], 0 |
|
|
1278 |
jz .bgr_full |
|
|
1279 |
mov ebx, [main_img] |
|
|
1280 |
mov eax, [edx + Image.Extended] |
|
|
1281 |
call img.decode.gif._.is_logical_screen |
|
|
1282 |
jnz @f |
|
|
1283 |
.bgr_full: |
|
|
1284 |
xor eax, eax |
|
|
1285 |
mov [prev_img_data], eax |
|
|
1286 |
inc eax |
|
|
1287 |
mov [prev_num_colors], eax |
|
|
1288 |
lea eax, [background_color] |
|
|
1289 |
mov [prev_palette], eax |
|
|
1290 |
retn |
|
|
1291 |
@@: |
|
|
1292 |
cmp [prev_num_colors], 0x100 |
|
|
1293 |
ja .rgb |
|
|
1294 |
mov eax, [background_color] |
|
|
1295 |
mov edi, [prev_palette] |
|
|
1296 |
mov ecx, [prev_num_colors] |
|
|
1297 |
repnz scasd |
|
|
1298 |
jz .palette_ok |
|
|
1299 |
cmp [prev_num_colors], 0x100 |
|
|
1300 |
jz .convert_rgb |
|
|
1301 |
push 1 |
|
|
1302 |
pop eax |
|
|
1303 |
stdcall img.decode.gif._.alloc_aux_img |
|
|
1304 |
test eax, eax |
|
|
1305 |
jz .previous |
|
|
1306 |
mov ecx, [prev_num_colors] |
|
|
1307 |
mov esi, [prev_palette] |
|
|
1308 |
call img.decode.gif._.alloc_aux_palette |
|
|
1309 |
test eax, eax |
|
|
1310 |
jz .previous |
|
|
1311 |
mov [prev_palette], eax |
|
|
1312 |
mov eax, [background_color] |
|
|
1313 |
stosd |
|
|
1314 |
mov eax, [prev_num_colors] ; eax = index of background color |
|
|
1315 |
inc [prev_num_colors] |
|
|
1316 |
jmp .bpp8_common |
|
|
1317 |
.palette_ok: |
|
|
1318 |
push 1 |
|
|
1319 |
pop eax |
|
|
1320 |
stdcall img.decode.gif._.alloc_aux_img |
|
|
1321 |
test eax, eax |
|
|
1322 |
jz .previous |
|
|
1323 |
sub edi, [prev_palette] |
|
|
1324 |
shr edi, 2 |
|
|
1325 |
lea eax, [edi-1] ; eax = index of background color |
|
|
1326 |
.bpp8_common: |
|
|
1327 |
push eax |
|
|
1328 |
mov ebx, [_data] |
|
|
1329 |
mov esi, [prev_img_data] |
|
|
1330 |
mov edi, [aux_img_data] |
|
|
1331 |
mov [prev_img_data], edi |
|
|
1332 |
cmp esi, edi |
|
|
1333 |
jz @f |
|
|
1334 |
movzx ecx, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1335 |
movzx eax, [ebx + gif.Header.lsd.ScreenHeight] |
|
|
1336 |
imul ecx, eax |
|
|
1337 |
push edi |
|
|
1338 |
rep movsb |
|
|
1339 |
pop edi |
|
|
1340 |
@@: |
|
|
1341 |
movzx esi, [ebx + gif.Header.lsd.ScreenHeight] |
|
|
1342 |
movzx eax, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1343 |
mov edx, [edx + Image.Extended] |
|
|
1344 |
movzx ecx, [edx + gif.Image.info.Top] |
|
|
1345 |
sub esi, ecx |
|
|
1346 |
jbe .bpp8_ret |
|
|
1347 |
imul ecx, eax |
|
|
1348 |
add edi, ecx |
|
|
1349 |
cmp si, [edx + gif.Image.info.Height] |
|
|
1350 |
jb @f |
|
|
1351 |
mov si, [edx + gif.Image.info.Height] |
|
|
1352 |
@@: |
|
|
1353 |
movzx ecx, [edx + gif.Image.info.Left] |
|
|
1354 |
sub eax, ecx |
|
|
1355 |
jbe .bpp8_ret |
|
|
1356 |
add edi, ecx |
|
|
1357 |
cmp ax, [edx + gif.Image.info.Width] |
|
|
1358 |
jb @f |
|
|
1359 |
mov ax, [edx + gif.Image.info.Width] |
|
|
1360 |
@@: |
|
|
1361 |
xchg eax, ecx |
|
|
1362 |
movzx edx, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1363 |
sub edx, ecx |
|
|
1364 |
pop eax |
|
|
1365 |
@@: |
|
|
1366 |
push ecx |
|
|
1367 |
rep stosb |
|
|
1368 |
pop ecx |
|
|
1369 |
add edi, edx |
|
|
1370 |
dec esi |
|
|
1371 |
jnz @b |
|
|
1372 |
push eax |
|
|
1373 |
.bpp8_ret: |
|
|
1374 |
pop eax |
|
|
1375 |
retn |
|
|
1376 |
.convert_rgb: |
|
|
1377 |
push 3 |
|
|
1378 |
pop eax |
|
|
1379 |
stdcall img.decode.gif._.alloc_aux_img |
|
|
1380 |
test eax, eax |
|
|
1381 |
jz .previous |
|
|
1382 |
or [prev_num_colors], -1 |
|
|
1383 |
mov ebx, [_data] |
|
|
1384 |
mov esi, [prev_img_data] |
|
|
1385 |
mov edi, [aux_img_data] |
|
|
1386 |
mov [prev_img_data], edi |
|
|
1387 |
movzx ecx, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1388 |
movzx eax, [ebx + gif.Header.lsd.ScreenHeight] |
|
|
1389 |
imul ecx, eax |
|
|
1390 |
push edx |
|
|
1391 |
xor edx, edx |
|
|
1392 |
xchg edx, [prev_palette] |
|
|
1393 |
add edi, ecx |
|
|
1394 |
add esi, ecx |
|
|
1395 |
add edi, ecx |
|
|
1396 |
add edi, ecx |
|
|
1397 |
@@: |
|
|
1398 |
dec esi |
|
|
1399 |
movzx eax, byte [esi] |
|
|
1400 |
mov eax, [eax*4+edx] |
|
|
1401 |
sub edi, 3 |
|
|
1402 |
mov [edi], ax |
|
|
1403 |
shr eax, 16 |
|
|
1404 |
mov [edi+2], al |
|
|
1405 |
loop @b |
|
|
1406 |
pop edx |
|
|
1407 |
movzx esi, [ebx + gif.Header.lsd.ScreenHeight] |
|
|
1408 |
movzx eax, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1409 |
mov edx, [edx + Image.Extended] |
|
|
1410 |
movzx ecx, [edx + gif.Image.info.Top] |
|
|
1411 |
sub esi, ecx |
|
|
1412 |
jbe .convert_rgb_ret |
|
|
1413 |
imul ecx, eax |
|
|
1414 |
lea ecx, [ecx*3] |
|
|
1415 |
add edi, ecx |
|
|
1416 |
cmp si, [edx + gif.Image.info.Height] |
|
|
1417 |
jb @f |
|
|
1418 |
mov si, [edx + gif.Image.info.Height] |
|
|
1419 |
@@: |
|
|
1420 |
movzx ecx, [edx + gif.Image.info.Left] |
|
|
1421 |
sub eax, ecx |
|
|
1422 |
jbe .convert_rgb_ret |
|
|
1423 |
lea ecx, [ecx*3] |
|
|
1424 |
add edi, ecx |
|
|
1425 |
cmp ax, [edx + gif.Image.info.Width] |
|
|
1426 |
jb @f |
|
|
1427 |
mov ax, [edx + gif.Image.info.Width] |
|
|
1428 |
@@: |
|
|
1429 |
xchg eax, ecx |
|
|
1430 |
movzx edx, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1431 |
sub edx, ecx |
|
|
1432 |
mov eax, [background_color] |
|
|
1433 |
lea edx, [edx*3] |
|
|
1434 |
.convert_rgb_loop: |
|
|
1435 |
push ecx |
|
|
1436 |
@@: |
|
|
1437 |
stosw |
|
|
1438 |
shr eax, 16 |
|
|
1439 |
stosb |
|
|
1440 |
loop @b |
|
|
1441 |
pop ecx |
|
|
1442 |
add edi, edx |
|
|
1443 |
dec esi |
|
|
1444 |
jnz .convert_rgb_loop |
|
|
1445 |
.convert_rgb_ret: |
|
|
1446 |
retn |
|
|
1447 |
.rgb: |
|
|
1448 |
push 3 |
|
|
1449 |
pop eax |
|
|
1450 |
stdcall img.decode.gif._.alloc_aux_img |
|
|
1451 |
test eax, eax |
|
|
1452 |
jz .previous |
|
|
1453 |
or [prev_num_colors], -1 |
|
|
1454 |
and [prev_palette], 0 |
|
|
1455 |
mov ebx, [_data] |
|
|
1456 |
mov esi, [prev_img_data] |
|
|
1457 |
mov edi, [aux_img_data] |
|
|
1458 |
mov [prev_img_data], edi |
|
|
1459 |
cmp esi, edi |
|
|
1460 |
jz @f |
|
|
1461 |
movzx ecx, [ebx + gif.Header.lsd.ScreenHeight] |
|
|
1462 |
push ecx |
|
|
1463 |
movzx eax, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1464 |
imul ecx, eax |
|
|
1465 |
lea ecx, [ecx*3] |
|
|
1466 |
push edi |
|
|
1467 |
rep movsb |
|
|
1468 |
pop edi |
|
|
1469 |
pop esi |
|
|
1470 |
mov edx, [edx + Image.Extended] |
|
|
1471 |
movzx ecx, [edx + gif.Image.info.Top] |
|
|
1472 |
sub esi, ecx |
|
|
1473 |
jbe .rgb_ret |
|
|
1474 |
imul ecx, eax |
|
|
1475 |
lea ecx, [ecx*3] |
|
|
1476 |
add edi, ecx |
|
|
1477 |
cmp si, [edx + gif.Image.info.Height] |
|
|
1478 |
jb @f |
|
|
1479 |
mov si, [edx + gif.Image.info.Height] |
|
|
1480 |
@@: |
|
|
1481 |
movzx ecx, [edx + gif.Image.info.Left] |
|
|
1482 |
sub eax, ecx |
|
|
1483 |
jbe .rgb_ret |
|
|
1484 |
lea ecx, [ecx*3] |
|
|
1485 |
add edi, ecx |
|
|
1486 |
cmp ax, [edx + gif.Image.info.Width] |
|
|
1487 |
jb @f |
|
|
1488 |
mov ax, [edx + gif.Image.info.Width] |
|
|
1489 |
@@: |
|
|
1490 |
xchg eax, ecx |
|
|
1491 |
movzx edx, [ebx + gif.Header.lsd.ScreenWidth] |
|
|
1492 |
sub edx, ecx |
|
|
1493 |
mov eax, [background_color] |
|
|
1494 |
lea edx, [edx*3] |
|
|
1495 |
.rgb_loop: |
|
|
1496 |
push ecx |
|
|
1497 |
@@: |
|
|
1498 |
stosw |
|
|
1499 |
shr eax, 16 |
|
|
1500 |
stosb |
|
|
1501 |
loop @b |
|
|
1502 |
pop ecx |
|
|
1503 |
add edi, edx |
|
|
1504 |
dec esi |
|
|
1505 |
jnz .rgb_loop |
|
|
1506 |
.rgb_ret: |
|
|
1507 |
retn |
|
|
1508 |
|
|
|
1509 |
endp |
|
|
1510 |
|
|
|
1511 |
;;================================================================================================;; |
|
|
1512 |
proc img.decode.gif._.alloc_aux_img ;/////////////////////////////////////////////////////////////;; |
|
|
1513 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1514 |
;? Allocate auxiliary memory for previous image ;; |
|
|
1515 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1516 |
;> eax = image type: 1 = bpp8, 3 = bpp24 ;; |
|
|
1517 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1518 |
;< eax = [aux_img_data] ;; |
|
|
1519 |
;;================================================================================================;; |
|
|
1520 |
cmp [aux_img_type], eax |
|
|
1521 |
jae @f |
|
|
1522 |
push edx eax |
|
|
1523 |
movzx ecx, [ebx + sizeof.gif.Image + gif.LogicalScreenDescriptor.ScreenWidth] |
|
|
1524 |
mul ecx |
|
|
1525 |
movzx ecx, [ebx + sizeof.gif.Image + gif.LogicalScreenDescriptor.ScreenHeight] |
|
|
1526 |
mul ecx |
|
|
1527 |
invoke mem.realloc, [aux_img_data], eax |
|
|
1528 |
pop ecx edx |
|
|
1529 |
test eax, eax |
|
|
1530 |
jz @f |
|
|
1531 |
mov [aux_img_type], ecx |
|
|
1532 |
mov [aux_img_data], eax |
|
|
1533 |
@@: retn |
|
|
1534 |
|
|
|
1535 |
endp |
|
|
1536 |
|
|
|
1537 |
;;================================================================================================;; |
|
|
1538 |
proc img.decode.gif._.alloc_aux_palette ;/////////////////////////////////////////////////////////;; |
|
|
1539 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1540 |
;? Allocate and fill aux_palette ;; |
|
|
1541 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1542 |
;> esi -> palette, ecx = palette size ;; |
|
|
1543 |
;;------------------------------------------------------------------------------------------------;; |
|
|
1544 |
;< [aux_palette] set ;; |
|
|
1545 |
;;================================================================================================;; |
|
|
1546 |
mov eax, [aux_palette] |
|
|
1547 |
test eax, eax |
|
|
1548 |
jnz @f |
|
|
1549 |
push edx ecx |
|
|
1550 |
invoke mem.alloc, 0x400 |
|
|
1551 |
pop ecx edx |
|
|
1552 |
test eax, eax |
|
|
1553 |
jz .ret |
|
|
1554 |
mov [aux_palette], eax |
|
|
1555 |
@@: |
|
|
1556 |
mov edi, eax |
|
|
1557 |
rep movsd |
|
|
1558 |
.ret: |
|
|
1559 |
retn |
|
|
1560 |
|
|
|
1561 |
endp |
|
|
1562 |
|
|
|
1563 |
restore main_img |
|
|
1564 |
restore transparent_color |
|
|
1565 |
restore background_color |
|
|
1566 |
restore prev_num_colors |
|
|
1567 |
restore prev_palette |
|
|
1568 |
restore max_color |
|
|
1569 |
restore prev_img_data |
|
|
1570 |
restore _data |
|
|
1571 |
restore aux_img_data |
|
|
1572 |
restore aux_img_type |
|
|
1573 |
restore aux_palette |
|
|
1574 |
|
|
|
1575 |
;;================================================================================================;; |
|
|
1576 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
|
|
1577 |
;;================================================================================================;; |
|
|
1578 |
;! Below is private data you should never use directly from your code ;; |
|
|
1579 |
;;================================================================================================;; |
|
|
1580 |
;;////////////////////////////////////////////////////////////////////////////////////////////////;; |
|
|
1581 |
;;================================================================================================;; |
|
|
1582 |
|
|
|
1583 |
|
|
|
1584 |
; |