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Diffstat (limited to 'WebCore/platform/image-decoders/gif/GIFImageReader.h')
| -rw-r--r-- | WebCore/platform/image-decoders/gif/GIFImageReader.h | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/WebCore/platform/image-decoders/gif/GIFImageReader.h b/WebCore/platform/image-decoders/gif/GIFImageReader.h deleted file mode 100644 index be5be19..0000000 --- a/WebCore/platform/image-decoders/gif/GIFImageReader.h +++ /dev/null @@ -1,209 +0,0 @@ -/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/* ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is Mozilla Communicator client code. - * - * The Initial Developer of the Original Code is - * Netscape Communications Corporation. - * Portions created by the Initial Developer are Copyright (C) 1998 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * - * Alternatively, the contents of this file may be used under the terms of - * either the GNU General Public License Version 2 or later (the "GPL"), or - * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ - -#ifndef GIFImageReader_h -#define GIFImageReader_h - -// Define ourselves as the clientPtr. Mozilla just hacked their C++ callback class into this old C decoder, -// so we will too. -#include "GIFImageDecoder.h" - -#define MAX_LZW_BITS 12 -#define MAX_BITS 4097 /* 2^MAX_LZW_BITS+1 */ -#define MAX_COLORS 256 -#define MAX_HOLD_SIZE 256 - -const int cLoopCountNotSeen = -2; - -/* gif2.h - The interface for the GIF87/89a decoder. -*/ -// List of possible parsing states -typedef enum { - gif_type, - gif_global_header, - gif_global_colormap, - gif_image_start, - gif_image_header, - gif_image_colormap, - gif_image_body, - gif_lzw_start, - gif_lzw, - gif_sub_block, - gif_extension, - gif_control_extension, - gif_consume_block, - gif_skip_block, - gif_done, - gif_comment_extension, - gif_application_extension, - gif_netscape_extension_block, - gif_consume_netscape_extension, - gif_consume_comment -} gstate; - -struct GIFFrameReader { - /* LZW decoder state machine */ - unsigned char *stackp; /* Current stack pointer */ - int datasize; - int codesize; - int codemask; - int clear_code; /* Codeword used to trigger dictionary reset */ - int avail; /* Index of next available slot in dictionary */ - int oldcode; - unsigned char firstchar; - int bits; /* Number of unread bits in "datum" */ - int datum; /* 32-bit input buffer */ - - /* Output state machine */ - int ipass; /* Interlace pass; Ranges 1-4 if interlaced. */ - unsigned int rows_remaining; /* Rows remaining to be output */ - unsigned int irow; /* Current output row, starting at zero */ - unsigned char *rowbuf; /* Single scanline temporary buffer */ - unsigned char *rowend; /* Pointer to end of rowbuf */ - unsigned char *rowp; /* Current output pointer */ - - /* Parameters for image frame currently being decoded */ - unsigned int x_offset, y_offset; /* With respect to "screen" origin */ - unsigned int height, width; - int tpixel; /* Index of transparent pixel */ - WebCore::RGBA32Buffer::FrameDisposalMethod disposal_method; /* Restore to background, leave in place, etc.*/ - unsigned char *local_colormap; /* Per-image colormap */ - int local_colormap_size; /* Size of local colormap array. */ - - bool is_local_colormap_defined : 1; - bool progressive_display : 1; /* If TRUE, do Haeberli interlace hack */ - bool interlaced : 1; /* TRUE, if scanlines arrive interlaced order */ - bool is_transparent : 1; /* TRUE, if tpixel is valid */ - - unsigned delay_time; /* Display time, in milliseconds, - for this image in a multi-image GIF */ - - - unsigned short* prefix; /* LZW decoding tables */ - unsigned char* suffix; /* LZW decoding tables */ - unsigned char* stack; /* Base of LZW decoder stack */ - - - GIFFrameReader() { - stackp = 0; - datasize = codesize = codemask = clear_code = avail = oldcode = 0; - firstchar = 0; - bits = datum = 0; - ipass = 0; - rows_remaining = irow = 0; - rowbuf = rowend = rowp = 0; - - x_offset = y_offset = width = height = 0; - tpixel = 0; - disposal_method = WebCore::RGBA32Buffer::DisposeNotSpecified; - - local_colormap = 0; - local_colormap_size = 0; - is_local_colormap_defined = progressive_display = is_transparent = interlaced = false; - - delay_time = 0; - - prefix = 0; - suffix = stack = 0; - } - - ~GIFFrameReader() { - delete []rowbuf; - delete []local_colormap; - delete []prefix; - delete []suffix; - delete []stack; - } -}; - -struct GIFImageReader { - WebCore::GIFImageDecoder* clientptr; - /* Parsing state machine */ - gstate state; /* Current decoder master state */ - unsigned bytes_to_consume; /* Number of bytes to accumulate */ - unsigned bytes_in_hold; /* bytes accumulated so far*/ - unsigned char hold[MAX_HOLD_SIZE]; /* Accumulation buffer */ - unsigned char* global_colormap; /* (3* MAX_COLORS in size) Default colormap if local not supplied, 3 bytes for each color */ - - /* Global (multi-image) state */ - int screen_bgcolor; /* Logical screen background color */ - int version; /* Either 89 for GIF89 or 87 for GIF87 */ - unsigned screen_width; /* Logical screen width & height */ - unsigned screen_height; - int global_colormap_size; /* Size of global colormap array. */ - unsigned images_decoded; /* Counts completed frames for animated GIFs */ - int images_count; /* Counted all frames seen so far (including incomplete frames) */ - int loop_count; /* Netscape specific extension block to control - the number of animation loops a GIF renders. */ - - // Not really global, but convenient to locate here. - int count; /* Remaining # bytes in sub-block */ - - GIFFrameReader* frame_reader; - - GIFImageReader(WebCore::GIFImageDecoder* client = 0) { - clientptr = client; - state = gif_type; - bytes_to_consume = 6; - bytes_in_hold = 0; - frame_reader = 0; - global_colormap = 0; - - screen_bgcolor = version = 0; - screen_width = screen_height = 0; - global_colormap_size = images_decoded = images_count = 0; - loop_count = cLoopCountNotSeen; - count = 0; - } - - ~GIFImageReader() { - delete []global_colormap; - global_colormap = 0; - delete frame_reader; - frame_reader = 0; - } - - bool read(const unsigned char * buf, unsigned int numbytes, - WebCore::GIFImageDecoder::GIFQuery query = WebCore::GIFImageDecoder::GIFFullQuery, unsigned haltAtFrame = -1); - -private: - bool output_row(); - bool do_lzw(const unsigned char *q); -}; - -#endif |