parent
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commit
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@ -0,0 +1,19 @@
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The GIFLIB distribution is Copyright (c) 1997 Eric S. Raymond
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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Load Diff
@ -23,71 +23,81 @@
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*/
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/*****************************************************************************
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* "Gif-Lib" - Yet another gif library.
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*
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* Written by: Gershon Elber IBM PC Ver 0.1, Jun. 1989
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*****************************************************************************
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* Handle error reporting for the GIF library.
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*****************************************************************************
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* History:
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* 17 Jun 89 - Version 1.0 by Gershon Elber.
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****************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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gif_err.c - handle error reporting for the GIF library.
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****************************************************************************/
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#include <stdio.h>
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#include "gif_lib.h"
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int _GifError = 0;
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#include "gif_lib_private.h"
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/*****************************************************************************
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* Return the last GIF error (0 if none) and reset the error.
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****************************************************************************/
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int
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GifLastError(void) {
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int i = _GifError;
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Return a string description of the last GIF error
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*****************************************************************************/
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const char *
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GifErrorString(int ErrorCode)
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{
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const char *Err;
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_GifError = 0;
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return i;
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}
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/*****************************************************************************
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* Print the last GIF error to stderr.
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****************************************************************************/
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void
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PrintGifError(void) {
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char *Err;
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switch (_GifError) {
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switch (ErrorCode) {
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case E_GIF_ERR_OPEN_FAILED:
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Err = "Failed to open given file";
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break;
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case E_GIF_ERR_WRITE_FAILED:
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Err = "Failed to write to given file";
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break;
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case E_GIF_ERR_HAS_SCRN_DSCR:
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Err = "Screen descriptor has already been set";
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break;
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case E_GIF_ERR_HAS_IMAG_DSCR:
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Err = "Image descriptor is still active";
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break;
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case E_GIF_ERR_NO_COLOR_MAP:
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Err = "Neither global nor local color map";
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break;
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case E_GIF_ERR_DATA_TOO_BIG:
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Err = "Number of pixels bigger than width * height";
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break;
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case E_GIF_ERR_NOT_ENOUGH_MEM:
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Err = "Failed to allocate required memory";
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break;
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case E_GIF_ERR_DISK_IS_FULL:
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Err = "Write failed (disk full?)";
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break;
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case E_GIF_ERR_CLOSE_FAILED:
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Err = "Failed to close given file";
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break;
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case E_GIF_ERR_NOT_WRITEABLE:
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Err = "Given file was not opened for write";
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break;
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case D_GIF_ERR_OPEN_FAILED:
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Err = "Failed to open given file";
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break;
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case D_GIF_ERR_READ_FAILED:
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Err = "Failed to Read from given file";
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Err = "Failed to read from given file";
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break;
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case D_GIF_ERR_NOT_GIF_FILE:
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Err = "Given file is NOT GIF file";
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Err = "Data is not in GIF format";
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break;
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case D_GIF_ERR_NO_SCRN_DSCR:
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Err = "No Screen Descriptor detected";
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Err = "No screen descriptor detected";
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break;
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case D_GIF_ERR_NO_IMAG_DSCR:
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Err = "No Image Descriptor detected";
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break;
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case D_GIF_ERR_NO_COLOR_MAP:
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Err = "Neither Global Nor Local color map";
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Err = "Neither global nor local color map";
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break;
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case D_GIF_ERR_WRONG_RECORD:
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Err = "Wrong record type detected";
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break;
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case D_GIF_ERR_DATA_TOO_BIG:
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Err = "#Pixels bigger than Width * Height";
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Err = "Number of pixels bigger than width * height";
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break;
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case D_GIF_ERR_NOT_ENOUGH_MEM:
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Err = "Fail to allocate required memory";
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Err = "Failed to allocate required memory";
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break;
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case D_GIF_ERR_CLOSE_FAILED:
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Err = "Failed to close given file";
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@ -99,14 +109,13 @@ PrintGifError(void) {
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Err = "Image is defective, decoding aborted";
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break;
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case D_GIF_ERR_EOF_TOO_SOON:
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Err = "Image EOF detected, before image complete";
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Err = "Image EOF detected before image complete";
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break;
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default:
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Err = NULL;
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break;
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}
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if (Err != NULL)
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fprintf(stderr, "\nGIF-LIB error: %s.\n", Err);
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else
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fprintf(stderr, "\nGIF-LIB undefined error %d.\n", _GifError);
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return Err;
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}
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/* end */
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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/******************************************************************************
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gif_hash.h - magfic constants and declarations for GIF LZW
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******************************************************************************/
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#ifndef _GIF_HASH_H_
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#define _GIF_HASH_H_
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#include <stdint.h>
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#define HT_SIZE 8192 /* 12bits = 4096 or twice as big! */
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#define HT_KEY_MASK 0x1FFF /* 13bits keys */
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#define HT_KEY_NUM_BITS 13 /* 13bits keys */
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#define HT_MAX_KEY 8191 /* 13bits - 1, maximal code possible */
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#define HT_MAX_CODE 4095 /* Biggest code possible in 12 bits. */
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/* The 32 bits of the long are divided into two parts for the key & code: */
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/* 1. The code is 12 bits as our compression algorithm is limited to 12bits */
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/* 2. The key is 12 bits Prefix code + 8 bit new char or 20 bits. */
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/* The key is the upper 20 bits. The code is the lower 12. */
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#define HT_GET_KEY(l) (l >> 12)
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#define HT_GET_CODE(l) (l & 0x0FFF)
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#define HT_PUT_KEY(l) (l << 12)
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#define HT_PUT_CODE(l) (l & 0x0FFF)
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typedef struct GifHashTableType {
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uint32_t HTable[HT_SIZE];
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} GifHashTableType;
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GifHashTableType *_InitHashTable(void);
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void _ClearHashTable(GifHashTableType *HashTable);
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void _InsertHashTable(GifHashTableType *HashTable, uint32_t Key, int Code);
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int _ExistsHashTable(GifHashTableType *HashTable, uint32_t Key);
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#endif /* _GIF_HASH_H_ */
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/* end */
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*/
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/******************************************************************************
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* In order to make life a little bit easier when using the GIF file format,
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* this library was written, and which does all the dirty work...
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*
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* Written by Gershon Elber, Jun. 1989
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* Hacks by Eric S. Raymond, Sep. 1992
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******************************************************************************
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* History:
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* 14 Jun 89 - Version 1.0 by Gershon Elber.
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* 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names)
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* 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp)
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* 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support)
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* 17 Dec 98 - Version 4.0 by Toshio Kuratomi (Fix extension writing code)
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*****************************************************************************/
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/* all encoding functionality stripped */
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gif_lib.h - service library for decoding and encoding GIF images
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*****************************************************************************/
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#ifndef _GIF_LIB_H_
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#define _GIF_LIB_H_ 1
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extern "C" {
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#endif /* __cplusplus */
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#define GIF_LIB_VERSION " Version 4.1, "
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#define GIFLIB_MAJOR 5
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#define GIFLIB_MINOR 1
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#define GIFLIB_RELEASE 1
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#define GIF_ERROR 0
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#define GIF_OK 1
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#ifndef TRUE
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#define TRUE 1
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#endif /* TRUE */
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#ifndef FALSE
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#define FALSE 0
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#endif /* FALSE */
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#include <stddef.h>
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#ifndef NULL
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#define NULL 0
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#endif /* NULL */
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#ifdef bool
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#undef bool
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#endif
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typedef int bool;
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#define false 0
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#define true 1
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#define GIF_STAMP "GIFVER" /* First chars in file - GIF stamp. */
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#define GIF_STAMP_LEN sizeof(GIF_STAMP) - 1
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@ -68,21 +57,11 @@ extern "C" {
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#define GIF87_STAMP "GIF87a" /* First chars in file - GIF stamp. */
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#define GIF89_STAMP "GIF89a" /* First chars in file - GIF stamp. */
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#define GIF_FILE_BUFFER_SIZE 16384 /* Files uses bigger buffers than usual. */
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typedef int GifBooleanType;
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typedef unsigned char GifPixelType;
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typedef unsigned char *GifRowType;
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typedef unsigned char GifByteType;
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#define GIF_MESSAGE(Msg) fprintf(stderr, "\n%s: %s\n", PROGRAM_NAME, Msg)
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#define GIF_EXIT(Msg) { GIF_MESSAGE(Msg); exit(-3); }
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#ifdef SYSV
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#define VoidPtr char *
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#else
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#define VoidPtr void *
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#endif /* SYSV */
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typedef unsigned int GifPrefixType;
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typedef int GifWord;
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typedef struct GifColorType {
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GifByteType Red, Green, Blue;
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@ -91,27 +70,52 @@ typedef struct GifColorType {
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typedef struct ColorMapObject {
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int ColorCount;
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int BitsPerPixel;
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bool SortFlag;
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GifColorType *Colors; /* on malloc(3) heap */
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} ColorMapObject;
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typedef struct GifImageDesc {
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int Left, Top, Width, Height, /* Current image dimensions. */
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Interlace; /* Sequential/Interlaced lines. */
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ColorMapObject *ColorMap; /* The local color map */
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GifWord Left, Top, Width, Height; /* Current image dimensions. */
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bool Interlace; /* Sequential/Interlaced lines. */
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ColorMapObject *ColorMap; /* The local color map */
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} GifImageDesc;
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typedef struct ExtensionBlock {
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int ByteCount;
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GifByteType *Bytes; /* on malloc(3) heap */
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int Function; /* The block function code */
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#define CONTINUE_EXT_FUNC_CODE 0x00 /* continuation subblock */
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#define COMMENT_EXT_FUNC_CODE 0xfe /* comment */
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#define GRAPHICS_EXT_FUNC_CODE 0xf9 /* graphics control (GIF89) */
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#define PLAINTEXT_EXT_FUNC_CODE 0x01 /* plaintext */
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#define APPLICATION_EXT_FUNC_CODE 0xff /* application block */
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} ExtensionBlock;
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typedef struct SavedImage {
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GifImageDesc ImageDesc;
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GifByteType *RasterBits; /* on malloc(3) heap */
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int ExtensionBlockCount; /* Count of extensions before image */
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ExtensionBlock *ExtensionBlocks; /* Extensions before image */
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} SavedImage;
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typedef struct GifFileType {
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int SWidth, SHeight, /* Screen dimensions. */
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SColorResolution, /* How many colors can we generate? */
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SBackGroundColor; /* I hope you understand this one... */
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ColorMapObject *SColorMap; /* NULL if not exists. */
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int ImageCount; /* Number of current image */
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GifImageDesc Image; /* Block describing current image */
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struct SavedImage *SavedImages; /* Use this to accumulate file state */
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VoidPtr UserData; /* hook to attach user data (TVT) */
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VoidPtr Private; /* Don't mess with this! */
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GifWord SWidth, SHeight; /* Size of virtual canvas */
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GifWord SColorResolution; /* How many colors can we generate? */
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GifWord SBackGroundColor; /* Background color for virtual canvas */
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GifByteType AspectByte; /* Used to compute pixel aspect ratio */
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ColorMapObject *SColorMap; /* Global colormap, NULL if nonexistent. */
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int ImageCount; /* Number of current image (both APIs) */
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GifImageDesc Image; /* Current image (low-level API) */
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SavedImage *SavedImages; /* Image sequence (high-level API) */
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int ExtensionBlockCount; /* Count extensions past last image */
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ExtensionBlock *ExtensionBlocks; /* Extensions past last image */
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int Error; /* Last error condition reported */
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void *UserData; /* hook to attach user data (TVT) */
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void *Private; /* Don't mess with this! */
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} GifFileType;
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#define GIF_ASPECT_RATIO(n) ((n)+15.0/64.0)
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typedef enum {
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UNDEFINED_RECORD_TYPE,
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SCREEN_DESC_RECORD_TYPE,
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@ -120,58 +124,95 @@ typedef enum {
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TERMINATE_RECORD_TYPE /* Begin with ';' */
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} GifRecordType;
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/* DumpScreen2Gif routine constants identify type of window/screen to dump.
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* Note all values below 1000 are reserved for the IBMPC different display
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* devices (it has many!) and are compatible with the numbering TC2.0
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* (Turbo C 2.0 compiler for IBM PC) gives to these devices.
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*/
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typedef enum {
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GIF_DUMP_SGI_WINDOW = 1000,
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GIF_DUMP_X_WINDOW = 1001
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} GifScreenDumpType;
|
||||
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/* func type to read gif data from arbitrary sources (TVT) */
|
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typedef int (*InputFunc) (GifFileType *, GifByteType *, int);
|
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|
||||
/* func type to write gif data ro arbitrary targets.
|
||||
/* func type to write gif data to arbitrary targets.
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* Returns count of bytes written. (MRB)
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*/
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typedef int (*OutputFunc) (GifFileType *, const GifByteType *, int);
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||||
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||||
/******************************************************************************
|
||||
* GIF89 extension function codes
|
||||
GIF89 structures
|
||||
******************************************************************************/
|
||||
|
||||
#define COMMENT_EXT_FUNC_CODE 0xfe /* comment */
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||||
#define GRAPHICS_EXT_FUNC_CODE 0xf9 /* graphics control */
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||||
#define PLAINTEXT_EXT_FUNC_CODE 0x01 /* plaintext */
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||||
#define APPLICATION_EXT_FUNC_CODE 0xff /* application block */
|
||||
typedef struct GraphicsControlBlock {
|
||||
int DisposalMode;
|
||||
#define DISPOSAL_UNSPECIFIED 0 /* No disposal specified. */
|
||||
#define DISPOSE_DO_NOT 1 /* Leave image in place */
|
||||
#define DISPOSE_BACKGROUND 2 /* Set area too background color */
|
||||
#define DISPOSE_PREVIOUS 3 /* Restore to previous content */
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bool UserInputFlag; /* User confirmation required before disposal */
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||||
int DelayTime; /* pre-display delay in 0.01sec units */
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int TransparentColor; /* Palette index for transparency, -1 if none */
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#define NO_TRANSPARENT_COLOR -1
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} GraphicsControlBlock;
|
||||
|
||||
/******************************************************************************
|
||||
* O.K., here are the routines one can access in order to decode GIF file:
|
||||
* (GIF_LIB file DGIF_LIB.C).
|
||||
*****************************************************************************/
|
||||
GIF encoding routines
|
||||
******************************************************************************/
|
||||
|
||||
GifFileType *DGifOpenFileName(const char *GifFileName);
|
||||
GifFileType *DGifOpenFileHandle(int GifFileHandle);
|
||||
GifFileType *DGifOpen(void *userPtr, InputFunc readFunc); /* new one
|
||||
* (TVT) */
|
||||
/* Main entry points */
|
||||
GifFileType *EGifOpenFileName(const char *GifFileName,
|
||||
const bool GifTestExistence, int *Error);
|
||||
GifFileType *EGifOpenFileHandle(const int GifFileHandle, int *Error);
|
||||
GifFileType *EGifOpen(void *userPtr, OutputFunc writeFunc, int *Error);
|
||||
int EGifSpew(GifFileType * GifFile);
|
||||
const char *EGifGetGifVersion(GifFileType *GifFile); /* new in 5.x */
|
||||
int EGifCloseFile(GifFileType *GifFile, int *ErrorCode);
|
||||
|
||||
#define E_GIF_SUCCEEDED 0
|
||||
#define E_GIF_ERR_OPEN_FAILED 1 /* And EGif possible errors. */
|
||||
#define E_GIF_ERR_WRITE_FAILED 2
|
||||
#define E_GIF_ERR_HAS_SCRN_DSCR 3
|
||||
#define E_GIF_ERR_HAS_IMAG_DSCR 4
|
||||
#define E_GIF_ERR_NO_COLOR_MAP 5
|
||||
#define E_GIF_ERR_DATA_TOO_BIG 6
|
||||
#define E_GIF_ERR_NOT_ENOUGH_MEM 7
|
||||
#define E_GIF_ERR_DISK_IS_FULL 8
|
||||
#define E_GIF_ERR_CLOSE_FAILED 9
|
||||
#define E_GIF_ERR_NOT_WRITEABLE 10
|
||||
|
||||
/* These are legacy. You probably do not want to call them directly */
|
||||
int EGifPutScreenDesc(GifFileType *GifFile,
|
||||
const int GifWidth, const int GifHeight,
|
||||
const int GifColorRes,
|
||||
const int GifBackGround,
|
||||
const ColorMapObject *GifColorMap);
|
||||
int EGifPutImageDesc(GifFileType *GifFile,
|
||||
const int GifLeft, const int GifTop,
|
||||
const int GifWidth, const int GifHeight,
|
||||
const bool GifInterlace,
|
||||
const ColorMapObject *GifColorMap);
|
||||
void EGifSetGifVersion(GifFileType *GifFile, const bool gif89);
|
||||
int EGifPutLine(GifFileType *GifFile, GifPixelType *GifLine,
|
||||
int GifLineLen);
|
||||
int EGifPutPixel(GifFileType *GifFile, const GifPixelType GifPixel);
|
||||
int EGifPutComment(GifFileType *GifFile, const char *GifComment);
|
||||
int EGifPutExtensionLeader(GifFileType *GifFile, const int GifExtCode);
|
||||
int EGifPutExtensionBlock(GifFileType *GifFile,
|
||||
const int GifExtLen, const void *GifExtension);
|
||||
int EGifPutExtensionTrailer(GifFileType *GifFile);
|
||||
int EGifPutExtension(GifFileType *GifFile, const int GifExtCode,
|
||||
const int GifExtLen,
|
||||
const void *GifExtension);
|
||||
int EGifPutCode(GifFileType *GifFile, int GifCodeSize,
|
||||
const GifByteType *GifCodeBlock);
|
||||
int EGifPutCodeNext(GifFileType *GifFile,
|
||||
const GifByteType *GifCodeBlock);
|
||||
|
||||
/******************************************************************************
|
||||
GIF decoding routines
|
||||
******************************************************************************/
|
||||
|
||||
/* Main entry points */
|
||||
GifFileType *DGifOpenFileName(const char *GifFileName, int *Error);
|
||||
GifFileType *DGifOpenFileHandle(int GifFileHandle, int *Error);
|
||||
int DGifSlurp(GifFileType * GifFile);
|
||||
int DGifGetScreenDesc(GifFileType * GifFile);
|
||||
int DGifGetRecordType(GifFileType * GifFile, GifRecordType * GifType);
|
||||
int DGifGetImageDesc(GifFileType * GifFile);
|
||||
int DGifGetLine(GifFileType * GifFile, GifPixelType * GifLine, int GifLineLen);
|
||||
int DGifGetPixel(GifFileType * GifFile, GifPixelType GifPixel);
|
||||
int DGifGetComment(GifFileType * GifFile, char *GifComment);
|
||||
int DGifGetExtension(GifFileType * GifFile, int *GifExtCode,
|
||||
GifByteType ** GifExtension);
|
||||
int DGifGetExtensionNext(GifFileType * GifFile, GifByteType ** GifExtension);
|
||||
int DGifGetCode(GifFileType * GifFile, int *GifCodeSize,
|
||||
GifByteType ** GifCodeBlock);
|
||||
int DGifGetCodeNext(GifFileType * GifFile, GifByteType ** GifCodeBlock);
|
||||
int DGifGetLZCodes(GifFileType * GifFile, int *GifCode);
|
||||
int DGifCloseFile(GifFileType * GifFile);
|
||||
GifFileType *DGifOpen(void *userPtr, InputFunc readFunc, int *Error); /* new one (TVT) */
|
||||
int DGifCloseFile(GifFileType * GifFile, int *ErrorCode);
|
||||
|
||||
#define D_GIF_SUCCEEDED 0
|
||||
#define D_GIF_ERR_OPEN_FAILED 101 /* And DGif possible errors. */
|
||||
#define D_GIF_ERR_READ_FAILED 102
|
||||
#define D_GIF_ERR_NOT_GIF_FILE 103
|
||||
@ -186,68 +227,113 @@ int DGifCloseFile(GifFileType * GifFile);
|
||||
#define D_GIF_ERR_IMAGE_DEFECT 112
|
||||
#define D_GIF_ERR_EOF_TOO_SOON 113
|
||||
|
||||
/* These are legacy. You probably do not want to call them directly */
|
||||
int DGifGetScreenDesc(GifFileType *GifFile);
|
||||
int DGifGetRecordType(GifFileType *GifFile, GifRecordType *GifType);
|
||||
int DGifGetImageDesc(GifFileType *GifFile);
|
||||
int DGifGetLine(GifFileType *GifFile, GifPixelType *GifLine, int GifLineLen);
|
||||
int DGifGetPixel(GifFileType *GifFile, GifPixelType GifPixel);
|
||||
int DGifGetComment(GifFileType *GifFile, char *GifComment);
|
||||
int DGifGetExtension(GifFileType *GifFile, int *GifExtCode,
|
||||
GifByteType **GifExtension);
|
||||
int DGifGetExtensionNext(GifFileType *GifFile, GifByteType **GifExtension);
|
||||
int DGifGetCode(GifFileType *GifFile, int *GifCodeSize,
|
||||
GifByteType **GifCodeBlock);
|
||||
int DGifGetCodeNext(GifFileType *GifFile, GifByteType **GifCodeBlock);
|
||||
int DGifGetLZCodes(GifFileType *GifFile, int *GifCode);
|
||||
|
||||
|
||||
/******************************************************************************
|
||||
* O.K., here are the routines from GIF_LIB file GIF_ERR.C.
|
||||
Color table quantization (deprecated)
|
||||
******************************************************************************/
|
||||
extern void PrintGifError(void);
|
||||
extern int GifLastError(void);
|
||||
int GifQuantizeBuffer(unsigned int Width, unsigned int Height,
|
||||
int *ColorMapSize, GifByteType * RedInput,
|
||||
GifByteType * GreenInput, GifByteType * BlueInput,
|
||||
GifByteType * OutputBuffer,
|
||||
GifColorType * OutputColorMap);
|
||||
|
||||
/******************************************************************************
|
||||
* O.K., here are the routines from GIF_LIB file DEV2GIF.C.
|
||||
Error handling and reporting.
|
||||
******************************************************************************/
|
||||
extern int DumpScreen2Gif(const char *FileName,
|
||||
int ReqGraphDriver,
|
||||
long ReqGraphMode1,
|
||||
long ReqGraphMode2,
|
||||
long ReqGraphMode3);
|
||||
extern const char *GifErrorString(int ErrorCode); /* new in 2012 - ESR */
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Everything below this point is new after version 1.2, supporting `slurp
|
||||
* mode' for doing I/O in two big belts with all the image-bashing in core.
|
||||
*
|
||||
*****************************************************************************/
|
||||
Everything below this point is new after version 1.2, supporting `slurp
|
||||
mode' for doing I/O in two big belts with all the image-bashing in core.
|
||||
******************************************************************************/
|
||||
|
||||
/******************************************************************************
|
||||
* Color Map handling from ALLOCGIF.C
|
||||
*****************************************************************************/
|
||||
Color map handling from gif_alloc.c
|
||||
******************************************************************************/
|
||||
|
||||
extern ColorMapObject *MakeMapObject(int ColorCount,
|
||||
const GifColorType * ColorMap);
|
||||
extern void FreeMapObject(ColorMapObject * Object);
|
||||
extern int BitSize(int n);
|
||||
extern ColorMapObject *GifMakeMapObject(int ColorCount,
|
||||
const GifColorType *ColorMap);
|
||||
extern void GifFreeMapObject(ColorMapObject *Object);
|
||||
extern ColorMapObject *GifUnionColorMap(const ColorMapObject *ColorIn1,
|
||||
const ColorMapObject *ColorIn2,
|
||||
GifPixelType ColorTransIn2[]);
|
||||
extern int GifBitSize(int n);
|
||||
|
||||
/******************************************************************************
|
||||
* Support for the in-core structures allocation (slurp mode).
|
||||
*****************************************************************************/
|
||||
Support for the in-core structures allocation (slurp mode).
|
||||
******************************************************************************/
|
||||
|
||||
/* This is the in-core version of an extension record */
|
||||
typedef struct {
|
||||
int ByteCount;
|
||||
char *Bytes; /* on malloc(3) heap */
|
||||
int Function; /* Holds the type of the Extension block. */
|
||||
} ExtensionBlock;
|
||||
extern void GifApplyTranslation(SavedImage *Image, GifPixelType Translation[]);
|
||||
extern int GifAddExtensionBlock(int *ExtensionBlock_Count,
|
||||
ExtensionBlock **ExtensionBlocks,
|
||||
int Function,
|
||||
unsigned int Len, unsigned char ExtData[]);
|
||||
extern void GifFreeExtensions(int *ExtensionBlock_Count,
|
||||
ExtensionBlock **ExtensionBlocks);
|
||||
extern SavedImage *GifMakeSavedImage(GifFileType *GifFile,
|
||||
const SavedImage *CopyFrom);
|
||||
extern void GifFreeSavedImages(GifFileType *GifFile);
|
||||
|
||||
/* This holds an image header, its unpacked raster bits, and extensions */
|
||||
typedef struct SavedImage {
|
||||
GifImageDesc ImageDesc;
|
||||
unsigned char *RasterBits; /* on malloc(3) heap */
|
||||
int Function; /* DEPRECATED: Use ExtensionBlocks[x].Function instead */
|
||||
int ExtensionBlockCount;
|
||||
ExtensionBlock *ExtensionBlocks; /* on malloc(3) heap */
|
||||
} SavedImage;
|
||||
/******************************************************************************
|
||||
5.x functions for GIF89 graphics control blocks
|
||||
******************************************************************************/
|
||||
|
||||
extern void MakeExtension(SavedImage * New, int Function);
|
||||
extern int AddExtensionBlock(SavedImage * New, int Len,
|
||||
unsigned char ExtData[]);
|
||||
extern void FreeExtension(SavedImage * Image);
|
||||
extern SavedImage *MakeSavedImage(GifFileType * GifFile,
|
||||
const SavedImage * CopyFrom);
|
||||
extern void FreeSavedImages(GifFileType * GifFile);
|
||||
int DGifExtensionToGCB(const size_t GifExtensionLength,
|
||||
const GifByteType *GifExtension,
|
||||
GraphicsControlBlock *GCB);
|
||||
size_t EGifGCBToExtension(const GraphicsControlBlock *GCB,
|
||||
GifByteType *GifExtension);
|
||||
|
||||
int DGifSavedExtensionToGCB(GifFileType *GifFile,
|
||||
int ImageIndex,
|
||||
GraphicsControlBlock *GCB);
|
||||
int EGifGCBToSavedExtension(const GraphicsControlBlock *GCB,
|
||||
GifFileType *GifFile,
|
||||
int ImageIndex);
|
||||
|
||||
/******************************************************************************
|
||||
The library's internal utility font
|
||||
******************************************************************************/
|
||||
|
||||
#define GIF_FONT_WIDTH 8
|
||||
#define GIF_FONT_HEIGHT 8
|
||||
extern const unsigned char GifAsciiTable8x8[][GIF_FONT_WIDTH];
|
||||
|
||||
extern void GifDrawText8x8(SavedImage *Image,
|
||||
const int x, const int y,
|
||||
const char *legend, const int color);
|
||||
|
||||
extern void GifDrawBox(SavedImage *Image,
|
||||
const int x, const int y,
|
||||
const int w, const int d, const int color);
|
||||
|
||||
extern void GifDrawRectangle(SavedImage *Image,
|
||||
const int x, const int y,
|
||||
const int w, const int d, const int color);
|
||||
|
||||
extern void GifDrawBoxedText8x8(SavedImage *Image,
|
||||
const int x, const int y,
|
||||
const char *legend,
|
||||
const int border, const int bg, const int fg);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* __cplusplus */
|
||||
#endif /* _GIF_LIB_H */
|
||||
|
||||
/* end */
|
||||
|
@ -22,21 +22,21 @@
|
||||
* questions.
|
||||
*/
|
||||
|
||||
/****************************************************************************
|
||||
|
||||
gif_lib_private.h - internal giflib routines and structures
|
||||
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef _GIF_LIB_PRIVATE_H
|
||||
#define _GIF_LIB_PRIVATE_H
|
||||
|
||||
#include "gif_lib.h"
|
||||
#include "gif_hash.h"
|
||||
|
||||
#define PROGRAM_NAME "LIBUNGIF"
|
||||
|
||||
#ifdef SYSV
|
||||
#define VersionStr "Gif library module,\t\tEric S. Raymond\n\
|
||||
(C) Copyright 1997 Eric S. Raymond\n"
|
||||
#else
|
||||
#define VersionStr PROGRAM_NAME " IBMPC " GIF_LIB_VERSION \
|
||||
" Eric S. Raymond, " __DATE__ ", " \
|
||||
__TIME__ "\n" "(C) Copyright 1997 Eric S. Raymond\n"
|
||||
#endif /* SYSV */
|
||||
#define EXTENSION_INTRODUCER 0x21
|
||||
#define DESCRIPTOR_INTRODUCER 0x2c
|
||||
#define TERMINATOR_INTRODUCER 0x3b
|
||||
|
||||
#define LZ_MAX_CODE 4095 /* Biggest code possible in 12 bits. */
|
||||
#define LZ_BITS 12
|
||||
@ -54,7 +54,7 @@
|
||||
#define IS_WRITEABLE(Private) (Private->FileState & FILE_STATE_WRITE)
|
||||
|
||||
typedef struct GifFilePrivateType {
|
||||
int FileState, FileHandle, /* Where all this data goes to! */
|
||||
GifWord FileState, FileHandle, /* Where all this data goes to! */
|
||||
BitsPerPixel, /* Bits per pixel (Codes uses at least this + 1). */
|
||||
ClearCode, /* The CLEAR LZ code. */
|
||||
EOFCode, /* The EOF LZ code. */
|
||||
@ -73,9 +73,11 @@ typedef struct GifFilePrivateType {
|
||||
GifByteType Buf[256]; /* Compressed input is buffered here. */
|
||||
GifByteType Stack[LZ_MAX_CODE]; /* Decoded pixels are stacked here. */
|
||||
GifByteType Suffix[LZ_MAX_CODE + 1]; /* So we can trace the codes. */
|
||||
unsigned int Prefix[LZ_MAX_CODE + 1];
|
||||
GifPrefixType Prefix[LZ_MAX_CODE + 1];
|
||||
GifHashTableType *HashTable;
|
||||
bool gif89;
|
||||
} GifFilePrivateType;
|
||||
|
||||
extern int _GifError;
|
||||
|
||||
#endif /* _GIF_LIB_PRIVATE_H */
|
||||
|
||||
/* end */
|
||||
|
@ -23,36 +23,27 @@
|
||||
*/
|
||||
|
||||
/*****************************************************************************
|
||||
* "Gif-Lib" - Yet another gif library.
|
||||
*
|
||||
* Written by: Gershon Elber Ver 0.1, Jun. 1989
|
||||
* Extensively hacked by: Eric S. Raymond Ver 1.?, Sep 1992
|
||||
*****************************************************************************
|
||||
* GIF construction tools
|
||||
*****************************************************************************
|
||||
* History:
|
||||
* 15 Sep 92 - Version 1.0 by Eric Raymond.
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include <config.h>
|
||||
#endif
|
||||
GIF construction tools
|
||||
|
||||
****************************************************************************/
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "gif_lib.h"
|
||||
|
||||
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
|
||||
|
||||
/******************************************************************************
|
||||
* Miscellaneous utility functions
|
||||
*****************************************************************************/
|
||||
Miscellaneous utility functions
|
||||
******************************************************************************/
|
||||
|
||||
/* return smallest bitfield size n will fit in */
|
||||
int
|
||||
BitSize(int n) {
|
||||
|
||||
GifBitSize(int n)
|
||||
{
|
||||
register int i;
|
||||
|
||||
for (i = 1; i <= 8; i++)
|
||||
@ -62,22 +53,21 @@ BitSize(int n) {
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
* Color map object functions
|
||||
*****************************************************************************/
|
||||
Color map object functions
|
||||
******************************************************************************/
|
||||
|
||||
/*
|
||||
* Allocate a color map of given size; initialize with contents of
|
||||
* ColorMap if that pointer is non-NULL.
|
||||
*/
|
||||
ColorMapObject *
|
||||
MakeMapObject(int ColorCount,
|
||||
const GifColorType * ColorMap) {
|
||||
|
||||
GifMakeMapObject(int ColorCount, const GifColorType *ColorMap)
|
||||
{
|
||||
ColorMapObject *Object;
|
||||
|
||||
/*** FIXME: Our ColorCount has to be a power of two. Is it necessary to
|
||||
* make the user know that or should we automatically round up instead? */
|
||||
if (ColorCount != (1 << BitSize(ColorCount))) {
|
||||
if (ColorCount != (1 << GifBitSize(ColorCount))) {
|
||||
return ((ColorMapObject *) NULL);
|
||||
}
|
||||
|
||||
@ -93,9 +83,10 @@ MakeMapObject(int ColorCount,
|
||||
}
|
||||
|
||||
Object->ColorCount = ColorCount;
|
||||
Object->BitsPerPixel = BitSize(ColorCount);
|
||||
Object->BitsPerPixel = GifBitSize(ColorCount);
|
||||
Object->SortFlag = false;
|
||||
|
||||
if (ColorMap) {
|
||||
if (ColorMap != NULL) {
|
||||
memcpy((char *)Object->Colors,
|
||||
(char *)ColorMap, ColorCount * sizeof(GifColorType));
|
||||
}
|
||||
@ -103,118 +94,222 @@ MakeMapObject(int ColorCount,
|
||||
return (Object);
|
||||
}
|
||||
|
||||
/*
|
||||
* Free a color map object
|
||||
*/
|
||||
/*******************************************************************************
|
||||
Free a color map object
|
||||
*******************************************************************************/
|
||||
void
|
||||
FreeMapObject(ColorMapObject * Object) {
|
||||
|
||||
GifFreeMapObject(ColorMapObject *Object)
|
||||
{
|
||||
if (Object != NULL) {
|
||||
free(Object->Colors);
|
||||
free(Object);
|
||||
Object = NULL;
|
||||
(void)free(Object->Colors);
|
||||
(void)free(Object);
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
void
|
||||
DumpColorMap(ColorMapObject * Object,
|
||||
FILE * fp) {
|
||||
|
||||
if (Object) {
|
||||
DumpColorMap(ColorMapObject *Object,
|
||||
FILE * fp)
|
||||
{
|
||||
if (Object != NULL) {
|
||||
int i, j, Len = Object->ColorCount;
|
||||
|
||||
for (i = 0; i < Len; i += 4) {
|
||||
for (j = 0; j < 4 && j < Len; j++) {
|
||||
fprintf(fp, "%3d: %02x %02x %02x ", i + j,
|
||||
Object->Colors[i + j].Red,
|
||||
Object->Colors[i + j].Green,
|
||||
Object->Colors[i + j].Blue);
|
||||
(void)fprintf(fp, "%3d: %02x %02x %02x ", i + j,
|
||||
Object->Colors[i + j].Red,
|
||||
Object->Colors[i + j].Green,
|
||||
Object->Colors[i + j].Blue);
|
||||
}
|
||||
fprintf(fp, "\n");
|
||||
(void)fprintf(fp, "\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* DEBUG */
|
||||
|
||||
/******************************************************************************
|
||||
* Extension record functions
|
||||
*****************************************************************************/
|
||||
/*******************************************************************************
|
||||
Compute the union of two given color maps and return it. If result can't
|
||||
fit into 256 colors, NULL is returned, the allocated union otherwise.
|
||||
ColorIn1 is copied as is to ColorUnion, while colors from ColorIn2 are
|
||||
copied iff they didn't exist before. ColorTransIn2 maps the old
|
||||
ColorIn2 into the ColorUnion color map table./
|
||||
*******************************************************************************/
|
||||
ColorMapObject *
|
||||
GifUnionColorMap(const ColorMapObject *ColorIn1,
|
||||
const ColorMapObject *ColorIn2,
|
||||
GifPixelType ColorTransIn2[])
|
||||
{
|
||||
int i, j, CrntSlot, RoundUpTo, NewGifBitSize;
|
||||
ColorMapObject *ColorUnion;
|
||||
|
||||
void
|
||||
MakeExtension(SavedImage * New,
|
||||
int Function) {
|
||||
|
||||
New->Function = Function;
|
||||
/*** FIXME:
|
||||
* Someday we might have to deal with multiple extensions.
|
||||
* ??? Was this a note from Gershon or from me? Does the multiple
|
||||
* extension blocks solve this or do we need multiple Functions? Or is
|
||||
* this an obsolete function? (People should use AddExtensionBlock
|
||||
* instead?)
|
||||
* Looks like AddExtensionBlock needs to take the int Function argument
|
||||
* then it can take the place of this function. Right now people have to
|
||||
* use both. Fix AddExtensionBlock and add this to the deprecation list.
|
||||
/*
|
||||
* We don't worry about duplicates within either color map; if
|
||||
* the caller wants to resolve those, he can perform unions
|
||||
* with an empty color map.
|
||||
*/
|
||||
|
||||
/* Allocate table which will hold the result for sure. */
|
||||
ColorUnion = GifMakeMapObject(MAX(ColorIn1->ColorCount,
|
||||
ColorIn2->ColorCount) * 2, NULL);
|
||||
|
||||
if (ColorUnion == NULL)
|
||||
return (NULL);
|
||||
|
||||
/*
|
||||
* Copy ColorIn1 to ColorUnion.
|
||||
*/
|
||||
for (i = 0; i < ColorIn1->ColorCount; i++)
|
||||
ColorUnion->Colors[i] = ColorIn1->Colors[i];
|
||||
CrntSlot = ColorIn1->ColorCount;
|
||||
|
||||
/*
|
||||
* Potentially obnoxious hack:
|
||||
*
|
||||
* Back CrntSlot down past all contiguous {0, 0, 0} slots at the end
|
||||
* of table 1. This is very useful if your display is limited to
|
||||
* 16 colors.
|
||||
*/
|
||||
while (ColorIn1->Colors[CrntSlot - 1].Red == 0
|
||||
&& ColorIn1->Colors[CrntSlot - 1].Green == 0
|
||||
&& ColorIn1->Colors[CrntSlot - 1].Blue == 0)
|
||||
CrntSlot--;
|
||||
|
||||
/* Copy ColorIn2 to ColorUnion (use old colors if they exist): */
|
||||
for (i = 0; i < ColorIn2->ColorCount && CrntSlot <= 256; i++) {
|
||||
/* Let's see if this color already exists: */
|
||||
for (j = 0; j < ColorIn1->ColorCount; j++)
|
||||
if (memcmp (&ColorIn1->Colors[j], &ColorIn2->Colors[i],
|
||||
sizeof(GifColorType)) == 0)
|
||||
break;
|
||||
|
||||
if (j < ColorIn1->ColorCount)
|
||||
ColorTransIn2[i] = j; /* color exists in Color1 */
|
||||
else {
|
||||
/* Color is new - copy it to a new slot: */
|
||||
ColorUnion->Colors[CrntSlot] = ColorIn2->Colors[i];
|
||||
ColorTransIn2[i] = CrntSlot++;
|
||||
}
|
||||
}
|
||||
|
||||
if (CrntSlot > 256) {
|
||||
GifFreeMapObject(ColorUnion);
|
||||
return ((ColorMapObject *) NULL);
|
||||
}
|
||||
|
||||
NewGifBitSize = GifBitSize(CrntSlot);
|
||||
RoundUpTo = (1 << NewGifBitSize);
|
||||
|
||||
if (RoundUpTo != ColorUnion->ColorCount) {
|
||||
register GifColorType *Map = ColorUnion->Colors;
|
||||
|
||||
/*
|
||||
* Zero out slots up to next power of 2.
|
||||
* We know these slots exist because of the way ColorUnion's
|
||||
* start dimension was computed.
|
||||
*/
|
||||
for (j = CrntSlot; j < RoundUpTo; j++)
|
||||
Map[j].Red = Map[j].Green = Map[j].Blue = 0;
|
||||
|
||||
/* perhaps we can shrink the map? */
|
||||
if (RoundUpTo < ColorUnion->ColorCount) {
|
||||
GifColorType *new_map = (GifColorType *)realloc(Map,
|
||||
sizeof(GifColorType) * RoundUpTo);
|
||||
if( new_map == NULL ) {
|
||||
GifFreeMapObject(ColorUnion);
|
||||
return ((ColorMapObject *) NULL);
|
||||
}
|
||||
ColorUnion->Colors = new_map;
|
||||
}
|
||||
}
|
||||
|
||||
ColorUnion->ColorCount = RoundUpTo;
|
||||
ColorUnion->BitsPerPixel = NewGifBitSize;
|
||||
|
||||
return (ColorUnion);
|
||||
}
|
||||
|
||||
int
|
||||
AddExtensionBlock(SavedImage * New,
|
||||
int Len,
|
||||
unsigned char ExtData[]) {
|
||||
/*******************************************************************************
|
||||
Apply a given color translation to the raster bits of an image
|
||||
*******************************************************************************/
|
||||
void
|
||||
GifApplyTranslation(SavedImage *Image, GifPixelType Translation[])
|
||||
{
|
||||
register int i;
|
||||
register int RasterSize = Image->ImageDesc.Height * Image->ImageDesc.Width;
|
||||
|
||||
for (i = 0; i < RasterSize; i++)
|
||||
Image->RasterBits[i] = Translation[Image->RasterBits[i]];
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
Extension record functions
|
||||
******************************************************************************/
|
||||
int
|
||||
GifAddExtensionBlock(int *ExtensionBlockCount,
|
||||
ExtensionBlock **ExtensionBlocks,
|
||||
int Function,
|
||||
unsigned int Len,
|
||||
unsigned char ExtData[])
|
||||
{
|
||||
ExtensionBlock *ep;
|
||||
|
||||
if (New->ExtensionBlocks == NULL)
|
||||
New->ExtensionBlocks=(ExtensionBlock *)malloc(sizeof(ExtensionBlock));
|
||||
else
|
||||
New->ExtensionBlocks = (ExtensionBlock *)realloc(New->ExtensionBlocks,
|
||||
if (*ExtensionBlocks == NULL)
|
||||
*ExtensionBlocks=(ExtensionBlock *)malloc(sizeof(ExtensionBlock));
|
||||
else {
|
||||
ExtensionBlock* ep_new = (ExtensionBlock *)realloc(*ExtensionBlocks,
|
||||
sizeof(ExtensionBlock) *
|
||||
(New->ExtensionBlockCount + 1));
|
||||
(*ExtensionBlockCount + 1));
|
||||
if( ep_new == NULL )
|
||||
return (GIF_ERROR);
|
||||
*ExtensionBlocks = ep_new;
|
||||
}
|
||||
|
||||
if (New->ExtensionBlocks == NULL)
|
||||
if (*ExtensionBlocks == NULL)
|
||||
return (GIF_ERROR);
|
||||
|
||||
ep = &New->ExtensionBlocks[New->ExtensionBlockCount++];
|
||||
ep = &(*ExtensionBlocks)[(*ExtensionBlockCount)++];
|
||||
|
||||
ep->Function = Function;
|
||||
ep->ByteCount=Len;
|
||||
ep->Bytes = (char *)malloc(ep->ByteCount);
|
||||
ep->Bytes = (GifByteType *)malloc(ep->ByteCount);
|
||||
if (ep->Bytes == NULL)
|
||||
return (GIF_ERROR);
|
||||
|
||||
if (ExtData) {
|
||||
if (ExtData != NULL) {
|
||||
memcpy(ep->Bytes, ExtData, Len);
|
||||
ep->Function = New->Function;
|
||||
}
|
||||
|
||||
return (GIF_OK);
|
||||
}
|
||||
|
||||
void
|
||||
FreeExtension(SavedImage * Image)
|
||||
GifFreeExtensions(int *ExtensionBlockCount,
|
||||
ExtensionBlock **ExtensionBlocks)
|
||||
{
|
||||
ExtensionBlock *ep;
|
||||
|
||||
if ((Image == NULL) || (Image->ExtensionBlocks == NULL)) {
|
||||
if (*ExtensionBlocks == NULL)
|
||||
return;
|
||||
}
|
||||
for (ep = Image->ExtensionBlocks;
|
||||
ep < (Image->ExtensionBlocks + Image->ExtensionBlockCount); ep++)
|
||||
|
||||
for (ep = *ExtensionBlocks;
|
||||
ep < (*ExtensionBlocks + *ExtensionBlockCount);
|
||||
ep++)
|
||||
(void)free((char *)ep->Bytes);
|
||||
free((char *)Image->ExtensionBlocks);
|
||||
Image->ExtensionBlocks = NULL;
|
||||
(void)free((char *)*ExtensionBlocks);
|
||||
*ExtensionBlocks = NULL;
|
||||
*ExtensionBlockCount = 0;
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
* Image block allocation functions
|
||||
Image block allocation functions
|
||||
******************************************************************************/
|
||||
|
||||
/* Private Function:
|
||||
* Frees the last image in the GifFile->SavedImages array
|
||||
*/
|
||||
void
|
||||
FreeLastSavedImage(GifFileType *GifFile) {
|
||||
|
||||
FreeLastSavedImage(GifFileType *GifFile)
|
||||
{
|
||||
SavedImage *sp;
|
||||
|
||||
if ((GifFile == NULL) || (GifFile->SavedImages == NULL))
|
||||
@ -225,20 +320,21 @@ FreeLastSavedImage(GifFileType *GifFile) {
|
||||
sp = &GifFile->SavedImages[GifFile->ImageCount];
|
||||
|
||||
/* Deallocate its Colormap */
|
||||
if (sp->ImageDesc.ColorMap)
|
||||
FreeMapObject(sp->ImageDesc.ColorMap);
|
||||
if (sp->ImageDesc.ColorMap != NULL) {
|
||||
GifFreeMapObject(sp->ImageDesc.ColorMap);
|
||||
sp->ImageDesc.ColorMap = NULL;
|
||||
}
|
||||
|
||||
/* Deallocate the image data */
|
||||
if (sp->RasterBits)
|
||||
if (sp->RasterBits != NULL)
|
||||
free((char *)sp->RasterBits);
|
||||
|
||||
/* Deallocate any extensions */
|
||||
if (sp->ExtensionBlocks)
|
||||
FreeExtension(sp);
|
||||
GifFreeExtensions(&sp->ExtensionBlockCount, &sp->ExtensionBlocks);
|
||||
|
||||
/*** FIXME: We could realloc the GifFile->SavedImages structure but is
|
||||
* there a point to it? Saves some memory but we'd have to do it every
|
||||
* time. If this is used in FreeSavedImages then it would be inefficient
|
||||
* time. If this is used in GifFreeSavedImages then it would be inefficient
|
||||
* (The whole array is going to be deallocated.) If we just use it when
|
||||
* we want to free the last Image it's convenient to do it here.
|
||||
*/
|
||||
@ -248,11 +344,8 @@ FreeLastSavedImage(GifFileType *GifFile) {
|
||||
* Append an image block to the SavedImages array
|
||||
*/
|
||||
SavedImage *
|
||||
MakeSavedImage(GifFileType * GifFile,
|
||||
const SavedImage * CopyFrom) {
|
||||
|
||||
SavedImage *sp;
|
||||
|
||||
GifMakeSavedImage(GifFileType *GifFile, const SavedImage *CopyFrom)
|
||||
{
|
||||
if (GifFile->SavedImages == NULL)
|
||||
GifFile->SavedImages = (SavedImage *)malloc(sizeof(SavedImage));
|
||||
else
|
||||
@ -262,10 +355,10 @@ MakeSavedImage(GifFileType * GifFile,
|
||||
if (GifFile->SavedImages == NULL)
|
||||
return ((SavedImage *)NULL);
|
||||
else {
|
||||
sp = &GifFile->SavedImages[GifFile->ImageCount++];
|
||||
SavedImage *sp = &GifFile->SavedImages[GifFile->ImageCount++];
|
||||
memset((char *)sp, '\0', sizeof(SavedImage));
|
||||
|
||||
if (CopyFrom) {
|
||||
if (CopyFrom != NULL) {
|
||||
memcpy((char *)sp, CopyFrom, sizeof(SavedImage));
|
||||
|
||||
/*
|
||||
@ -275,8 +368,8 @@ MakeSavedImage(GifFileType * GifFile,
|
||||
*/
|
||||
|
||||
/* first, the local color map */
|
||||
if (sp->ImageDesc.ColorMap) {
|
||||
sp->ImageDesc.ColorMap = MakeMapObject(
|
||||
if (sp->ImageDesc.ColorMap != NULL) {
|
||||
sp->ImageDesc.ColorMap = GifMakeMapObject(
|
||||
CopyFrom->ImageDesc.ColorMap->ColorCount,
|
||||
CopyFrom->ImageDesc.ColorMap->Colors);
|
||||
if (sp->ImageDesc.ColorMap == NULL) {
|
||||
@ -298,7 +391,7 @@ MakeSavedImage(GifFileType * GifFile,
|
||||
CopyFrom->ImageDesc.Width);
|
||||
|
||||
/* finally, the extension blocks */
|
||||
if (sp->ExtensionBlocks) {
|
||||
if (sp->ExtensionBlocks != NULL) {
|
||||
sp->ExtensionBlocks = (ExtensionBlock *)malloc(
|
||||
sizeof(ExtensionBlock) *
|
||||
CopyFrom->ExtensionBlockCount);
|
||||
@ -308,17 +401,6 @@ MakeSavedImage(GifFileType * GifFile,
|
||||
}
|
||||
memcpy(sp->ExtensionBlocks, CopyFrom->ExtensionBlocks,
|
||||
sizeof(ExtensionBlock) * CopyFrom->ExtensionBlockCount);
|
||||
|
||||
/*
|
||||
* For the moment, the actual blocks can take their
|
||||
* chances with free(). We'll fix this later.
|
||||
*** FIXME: [Better check this out... Toshio]
|
||||
* 2004 May 27: Looks like this was an ESR note.
|
||||
* It means the blocks are shallow copied from InFile to
|
||||
* OutFile. However, I don't see that in this code....
|
||||
* Did ESR fix it but never remove this note (And other notes
|
||||
* in gifspnge?)
|
||||
*/
|
||||
}
|
||||
}
|
||||
|
||||
@ -327,8 +409,8 @@ MakeSavedImage(GifFileType * GifFile,
|
||||
}
|
||||
|
||||
void
|
||||
FreeSavedImages(GifFileType * GifFile) {
|
||||
|
||||
GifFreeSavedImages(GifFileType *GifFile)
|
||||
{
|
||||
SavedImage *sp;
|
||||
|
||||
if ((GifFile == NULL) || (GifFile->SavedImages == NULL)) {
|
||||
@ -336,15 +418,18 @@ FreeSavedImages(GifFileType * GifFile) {
|
||||
}
|
||||
for (sp = GifFile->SavedImages;
|
||||
sp < GifFile->SavedImages + GifFile->ImageCount; sp++) {
|
||||
if (sp->ImageDesc.ColorMap)
|
||||
FreeMapObject(sp->ImageDesc.ColorMap);
|
||||
if (sp->ImageDesc.ColorMap != NULL) {
|
||||
GifFreeMapObject(sp->ImageDesc.ColorMap);
|
||||
sp->ImageDesc.ColorMap = NULL;
|
||||
}
|
||||
|
||||
if (sp->RasterBits)
|
||||
if (sp->RasterBits != NULL)
|
||||
free((char *)sp->RasterBits);
|
||||
|
||||
if (sp->ExtensionBlocks)
|
||||
FreeExtension(sp);
|
||||
GifFreeExtensions(&sp->ExtensionBlockCount, &sp->ExtensionBlocks);
|
||||
}
|
||||
free((char *)GifFile->SavedImages);
|
||||
GifFile->SavedImages=NULL;
|
||||
GifFile->SavedImages = NULL;
|
||||
}
|
||||
|
||||
/* end */
|
||||
|
@ -82,8 +82,8 @@ SplashDecodeGif(Splash * splash, GifFileType * gif)
|
||||
int i, j;
|
||||
int imageIndex;
|
||||
int cx, cy, cw, ch; /* clamped coordinates */
|
||||
const int interlacedOffset[] = { 0, 4, 2, 1, 0 }; /* The way Interlaced image should. */
|
||||
const int interlacedJumps[] = { 8, 8, 4, 2, 1 }; /* be read - offsets and jumps... */
|
||||
int numLines;
|
||||
int numPassLines;
|
||||
|
||||
if (DGifSlurp(gif) == GIF_ERROR) {
|
||||
return 0;
|
||||
@ -213,16 +213,6 @@ SplashDecodeGif(Splash * splash, GifFileType * gif)
|
||||
byte_t *pSrc = image->RasterBits;
|
||||
ImageFormat srcFormat;
|
||||
ImageRect srcRect, dstRect;
|
||||
int pass, npass;
|
||||
|
||||
if (desc->Interlace) {
|
||||
pass = 0;
|
||||
npass = 4;
|
||||
}
|
||||
else {
|
||||
pass = 4;
|
||||
npass = 5;
|
||||
}
|
||||
|
||||
srcFormat.colorMap = colorMapBuf;
|
||||
srcFormat.depthBytes = 1;
|
||||
@ -231,26 +221,22 @@ SplashDecodeGif(Splash * splash, GifFileType * gif)
|
||||
srcFormat.fixedBits = QUAD_ALPHA_MASK; // fixed 100% alpha
|
||||
srcFormat.premultiplied = 0;
|
||||
|
||||
for (; pass < npass; ++pass) {
|
||||
int jump = interlacedJumps[pass];
|
||||
int ofs = interlacedOffset[pass];
|
||||
/* Number of source lines for current pass */
|
||||
int numPassLines = (desc->Height + jump - ofs - 1) / jump;
|
||||
/* Number of lines that fits to dest buffer */
|
||||
int numLines = (ch + jump - ofs - 1) / jump;
|
||||
/* Number of source lines for current pass */
|
||||
numPassLines = desc->Height;
|
||||
/* Number of lines that fits to dest buffer */
|
||||
numLines = ch;
|
||||
|
||||
initRect(&srcRect, 0, 0, desc->Width, numLines, 1,
|
||||
desc->Width, pSrc, &srcFormat);
|
||||
initRect(&srcRect, 0, 0, desc->Width, numLines, 1,
|
||||
desc->Width, pSrc, &srcFormat);
|
||||
|
||||
if (numLines > 0) {
|
||||
initRect(&dstRect, cx, cy + ofs, cw,
|
||||
numLines , jump, stride, pBitmapBits, &splash->imageFormat);
|
||||
if (numLines > 0) {
|
||||
initRect(&dstRect, cx, cy, cw,
|
||||
numLines , 1, stride, pBitmapBits, &splash->imageFormat);
|
||||
|
||||
pSrc += convertRect(&srcRect, &dstRect, CVT_ALPHATEST);
|
||||
}
|
||||
// skip extra source data
|
||||
pSrc += (numPassLines - numLines) * srcRect.stride;
|
||||
pSrc += convertRect(&srcRect, &dstRect, CVT_ALPHATEST);
|
||||
}
|
||||
// skip extra source data
|
||||
pSrc += (numPassLines - numLines) * srcRect.stride;
|
||||
}
|
||||
|
||||
// now dispose of the previous frame correctly
|
||||
@ -310,7 +296,7 @@ SplashDecodeGif(Splash * splash, GifFileType * gif)
|
||||
free(pBitmapBits);
|
||||
free(pOldBitmapBits);
|
||||
|
||||
DGifCloseFile(gif);
|
||||
DGifCloseFile(gif, NULL);
|
||||
|
||||
return 1;
|
||||
}
|
||||
@ -318,7 +304,7 @@ SplashDecodeGif(Splash * splash, GifFileType * gif)
|
||||
int
|
||||
SplashDecodeGifStream(Splash * splash, SplashStream * stream)
|
||||
{
|
||||
GifFileType *gif = DGifOpen((void *) stream, SplashStreamGifInputFunc);
|
||||
GifFileType *gif = DGifOpen((void *) stream, SplashStreamGifInputFunc, NULL);
|
||||
|
||||
if (!gif)
|
||||
return 0;
|
||||
|
Loading…
Reference in New Issue
Block a user