2003-06-30 16:44:03 +04:00
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/*
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2004-03-24 01:17:08 +03:00
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* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
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2004-01-25 23:13:51 +03:00
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* Copyright 2004 John M Bell <jmb202@ecs.soton.ac.uk>
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2007-08-08 20:16:03 +04:00
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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2003-02-26 00:00:27 +03:00
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*/
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2004-03-24 01:17:08 +03:00
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/** \file
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* Content for image/jpeg (implementation).
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*
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* This implementation uses the IJG JPEG library.
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*/
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2015-04-14 01:19:04 +03:00
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#include <stdbool.h>
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2003-02-26 00:00:27 +03:00
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#include <stdlib.h>
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2015-04-14 01:19:04 +03:00
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#include <setjmp.h>
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2010-01-28 23:17:02 +03:00
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2016-04-20 01:20:29 +03:00
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#include "utils/utils.h"
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2007-05-31 02:39:54 +04:00
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#include "utils/log.h"
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#include "utils/messages.h"
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2015-04-14 01:19:04 +03:00
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#include "content/content_protected.h"
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#include "desktop/gui_internal.h"
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2016-05-24 01:32:16 +03:00
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#include "image_cache.h"
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#include "bitmap.h"
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2004-01-25 23:13:51 +03:00
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2010-01-28 23:17:02 +03:00
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#define JPEG_INTERNAL_OPTIONS
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#include "jpeglib.h"
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2016-05-24 01:32:16 +03:00
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#include "jpeg.h"
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2010-01-28 23:17:02 +03:00
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2011-09-05 03:50:14 +04:00
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/** absolute minimum size of a jpeg below which it is not even worth
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* trying to read header data
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*/
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#define MIN_JPEG_SIZE 20
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2008-03-10 17:29:43 +03:00
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#ifdef riscos
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2004-09-04 02:44:48 +04:00
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/* We prefer the library to be configured with these options to save
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2004-03-24 01:17:08 +03:00
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* copying data during decoding. */
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#if RGB_RED != 0 || RGB_GREEN != 1 || RGB_BLUE != 2 || RGB_PIXELSIZE != 4
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2004-09-04 02:44:48 +04:00
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#warning JPEG library not optimally configured. Decoding will be slower.
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2004-03-24 01:17:08 +03:00
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#endif
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2008-03-10 17:29:43 +03:00
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/* but we don't care if we're not on RISC OS */
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#endif
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2004-03-24 01:17:08 +03:00
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2004-06-11 00:41:26 +04:00
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static char nsjpeg_error_buffer[JMSG_LENGTH_MAX];
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2011-05-08 19:14:21 +04:00
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static unsigned char nsjpeg_eoi[] = { 0xff, JPEG_EOI };
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2011-05-07 00:40:09 +04:00
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2011-05-08 19:14:21 +04:00
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/**
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* Content create entry point.
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*/
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static nserror nsjpeg_create(const content_handler *handler,
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2016-04-19 01:04:16 +03:00
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lwc_string *imime_type, const struct http_parameter *params,
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2011-05-07 00:40:09 +04:00
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llcache_handle *llcache, const char *fallback_charset,
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bool quirks, struct content **c)
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{
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2011-09-05 03:50:14 +04:00
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struct content *jpeg;
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2011-05-07 00:40:09 +04:00
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nserror error;
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2012-10-03 22:24:58 +04:00
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jpeg = calloc(1, sizeof(struct content));
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2011-05-07 00:40:09 +04:00
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if (jpeg == NULL)
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return NSERROR_NOMEM;
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2011-09-05 03:50:14 +04:00
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error = content__init(jpeg, handler, imime_type, params,
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2011-05-08 19:14:21 +04:00
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llcache, fallback_charset, quirks);
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2011-05-07 00:40:09 +04:00
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if (error != NSERROR_OK) {
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2012-10-03 22:24:58 +04:00
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free(jpeg);
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2011-05-07 00:40:09 +04:00
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return error;
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}
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2011-09-05 03:50:14 +04:00
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*c = jpeg;
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2011-05-07 00:40:09 +04:00
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return NSERROR_OK;
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}
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2004-03-24 01:17:08 +03:00
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2004-01-25 23:13:51 +03:00
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/**
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2011-05-08 19:14:21 +04:00
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* JPEG data source manager: initialize source.
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*/
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static void nsjpeg_init_source(j_decompress_ptr cinfo)
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{
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}
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/**
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* JPEG data source manager: fill the input buffer.
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*
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* This can only occur if the JPEG data was truncated or corrupted. Insert a
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* fake EOI marker to allow the decompressor to output as much as possible.
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*/
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static boolean nsjpeg_fill_input_buffer(j_decompress_ptr cinfo)
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{
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cinfo->src->next_input_byte = nsjpeg_eoi;
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cinfo->src->bytes_in_buffer = 2;
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return TRUE;
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}
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/**
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* JPEG data source manager: skip num_bytes worth of data.
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*/
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static void nsjpeg_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
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{
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if ((long) cinfo->src->bytes_in_buffer < num_bytes) {
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cinfo->src->next_input_byte = 0;
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cinfo->src->bytes_in_buffer = 0;
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} else {
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cinfo->src->next_input_byte += num_bytes;
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cinfo->src->bytes_in_buffer -= num_bytes;
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}
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}
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/**
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* JPEG data source manager: terminate source.
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*/
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static void nsjpeg_term_source(j_decompress_ptr cinfo)
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{
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}
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2011-07-31 15:19:52 +04:00
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/**
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* Error output handler for JPEG library.
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*
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* This logs to NetSurf log instead of stderr.
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* Warnings only - fatal errors are trapped by nsjpeg_error_exit
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* and do not call the output handler.
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*/
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static void nsjpeg_error_log(j_common_ptr cinfo)
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{
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2011-10-30 19:00:32 +04:00
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cinfo->err->format_message(cinfo, nsjpeg_error_buffer);
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2015-05-28 18:08:46 +03:00
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LOG("%s", nsjpeg_error_buffer);
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2011-07-31 15:19:52 +04:00
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}
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2011-05-08 19:14:21 +04:00
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/**
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* Fatal error handler for JPEG library.
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*
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* This prevents jpeglib calling exit() on a fatal error.
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2004-01-25 23:13:51 +03:00
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*/
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2011-05-08 19:14:21 +04:00
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static void nsjpeg_error_exit(j_common_ptr cinfo)
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{
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2011-10-30 19:00:32 +04:00
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jmp_buf *setjmp_buffer = (jmp_buf *) cinfo->client_data;
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cinfo->err->format_message(cinfo, nsjpeg_error_buffer);
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2015-05-28 18:08:46 +03:00
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LOG("%s", nsjpeg_error_buffer);
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2011-09-05 03:50:14 +04:00
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2011-10-30 19:00:32 +04:00
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longjmp(*setjmp_buffer, 1);
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2011-05-08 19:14:21 +04:00
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}
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2004-01-25 23:13:51 +03:00
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2011-09-05 03:50:14 +04:00
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static struct bitmap *
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jpeg_cache_convert(struct content *c)
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2004-03-24 01:17:08 +03:00
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{
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2011-09-05 03:50:14 +04:00
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uint8_t *source_data; /* Jpeg source data */
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unsigned long source_size; /* length of Jpeg source data */
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2004-03-24 01:17:08 +03:00
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struct jpeg_decompress_struct cinfo;
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2011-10-30 19:00:32 +04:00
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struct jpeg_error_mgr jerr;
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jmp_buf setjmp_buffer;
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2004-03-24 01:17:08 +03:00
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unsigned int height;
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unsigned int width;
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2008-09-16 03:20:07 +04:00
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struct bitmap * volatile bitmap = NULL;
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uint8_t * volatile pixels = NULL;
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2004-09-04 02:44:48 +04:00
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size_t rowstride;
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2011-09-05 03:50:14 +04:00
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struct jpeg_source_mgr source_mgr = {
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0,
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0,
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nsjpeg_init_source,
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nsjpeg_fill_input_buffer,
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nsjpeg_skip_input_data,
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jpeg_resync_to_restart,
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nsjpeg_term_source };
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2010-03-28 16:56:39 +04:00
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2011-09-05 03:50:14 +04:00
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/* obtain jpeg source data and perfom minimal sanity checks */
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source_data = (uint8_t *)content__get_source_data(c, &source_size);
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if ((source_data == NULL) ||
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(source_size < MIN_JPEG_SIZE)) {
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return NULL;
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}
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2004-03-24 01:17:08 +03:00
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2011-09-05 03:50:14 +04:00
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/* setup a JPEG library error handler */
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2011-10-30 19:00:32 +04:00
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cinfo.err = jpeg_std_error(&jerr);
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jerr.error_exit = nsjpeg_error_exit;
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jerr.output_message = nsjpeg_error_log;
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2011-09-05 03:50:14 +04:00
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/* handler for fatal errors during decompression */
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2011-10-30 19:00:32 +04:00
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if (setjmp(setjmp_buffer)) {
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2004-03-24 01:17:08 +03:00
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jpeg_destroy_decompress(&cinfo);
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2011-09-05 03:50:14 +04:00
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return bitmap;
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2004-03-24 01:17:08 +03:00
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}
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2011-09-05 03:50:14 +04:00
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2004-03-24 01:17:08 +03:00
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jpeg_create_decompress(&cinfo);
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2011-10-30 19:00:32 +04:00
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cinfo.client_data = &setjmp_buffer;
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2011-09-05 03:50:14 +04:00
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/* setup data source */
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source_mgr.next_input_byte = source_data;
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source_mgr.bytes_in_buffer = source_size;
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2004-03-24 01:17:08 +03:00
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cinfo.src = &source_mgr;
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2011-09-05 03:50:14 +04:00
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/* read JPEG header information */
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2004-03-24 01:17:08 +03:00
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jpeg_read_header(&cinfo, TRUE);
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2011-09-05 03:50:14 +04:00
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/* set output processing parameters */
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2004-03-24 01:17:08 +03:00
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cinfo.out_color_space = JCS_RGB;
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cinfo.dct_method = JDCT_ISLOW;
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2011-09-05 03:50:14 +04:00
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/* commence the decompression, output parameters now valid */
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2004-03-24 01:17:08 +03:00
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jpeg_start_decompress(&cinfo);
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width = cinfo.output_width;
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height = cinfo.output_height;
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2011-09-05 03:50:14 +04:00
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/* create opaque bitmap (jpegs cannot be transparent) */
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2015-04-14 01:19:04 +03:00
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bitmap = guit->bitmap->create(width, height, BITMAP_NEW | BITMAP_OPAQUE);
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2011-09-05 03:50:14 +04:00
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if (bitmap == NULL) {
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/* empty bitmap could not be created */
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2004-06-11 00:41:26 +04:00
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jpeg_destroy_decompress(&cinfo);
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2011-09-05 03:50:14 +04:00
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return NULL;
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}
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2004-06-11 00:41:26 +04:00
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2015-04-14 01:19:04 +03:00
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pixels = guit->bitmap->get_buffer(bitmap);
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2011-09-05 03:50:14 +04:00
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if (pixels == NULL) {
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/* bitmap with no buffer available */
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2015-04-14 01:19:04 +03:00
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guit->bitmap->destroy(bitmap);
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2011-09-05 03:50:14 +04:00
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jpeg_destroy_decompress(&cinfo);
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return NULL;
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2004-03-24 01:17:08 +03:00
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}
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2011-09-05 03:50:14 +04:00
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/* Convert scanlines from jpeg into bitmap */
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2015-04-14 01:19:04 +03:00
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rowstride = guit->bitmap->get_rowstride(bitmap);
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2004-03-24 01:17:08 +03:00
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do {
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2011-09-05 03:50:14 +04:00
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JSAMPROW scanlines[1];
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2009-03-29 04:17:01 +04:00
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2004-09-04 02:44:48 +04:00
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scanlines[0] = (JSAMPROW) (pixels +
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2011-05-08 19:14:21 +04:00
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rowstride * cinfo.output_scanline);
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2004-03-24 01:17:08 +03:00
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jpeg_read_scanlines(&cinfo, scanlines, 1);
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2004-09-04 02:44:48 +04:00
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2012-08-10 23:28:23 +04:00
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#if RGB_RED != 0 || RGB_GREEN != 1 || RGB_BLUE != 2 || RGB_PIXELSIZE != 4
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{
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/* Missmatch between configured libjpeg pixel format and
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* NetSurf pixel format. Convert to RGBA */
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int i;
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2008-07-29 13:25:54 +04:00
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for (i = width - 1; 0 <= i; i--) {
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2004-09-04 02:44:48 +04:00
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int r = scanlines[0][i * RGB_PIXELSIZE + RGB_RED];
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int g = scanlines[0][i * RGB_PIXELSIZE + RGB_GREEN];
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int b = scanlines[0][i * RGB_PIXELSIZE + RGB_BLUE];
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scanlines[0][i * 4 + 0] = r;
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scanlines[0][i * 4 + 1] = g;
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scanlines[0][i * 4 + 2] = b;
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2004-10-05 18:36:44 +04:00
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scanlines[0][i * 4 + 3] = 0xff;
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2004-09-04 20:41:28 +04:00
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}
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2012-08-10 23:28:23 +04:00
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}
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2004-09-04 02:44:48 +04:00
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#endif
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2004-03-24 01:17:08 +03:00
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} while (cinfo.output_scanline != cinfo.output_height);
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2015-04-14 01:19:04 +03:00
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guit->bitmap->modified(bitmap);
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2004-03-24 01:17:08 +03:00
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jpeg_finish_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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2011-09-05 03:50:14 +04:00
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return bitmap;
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2004-01-25 23:13:51 +03:00
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}
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/**
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2011-09-05 03:50:14 +04:00
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* Convert a CONTENT_JPEG for display.
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2004-03-24 01:17:08 +03:00
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*/
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2011-09-05 03:50:14 +04:00
|
|
|
static bool nsjpeg_convert(struct content *c)
|
2003-02-26 00:00:27 +03:00
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|
{
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2011-09-05 03:50:14 +04:00
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struct jpeg_decompress_struct cinfo;
|
2011-10-30 19:00:32 +04:00
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|
|
struct jpeg_error_mgr jerr;
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jmp_buf setjmp_buffer;
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2011-09-05 03:50:14 +04:00
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struct jpeg_source_mgr source_mgr = { 0, 0,
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nsjpeg_init_source, nsjpeg_fill_input_buffer,
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nsjpeg_skip_input_data, jpeg_resync_to_restart,
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nsjpeg_term_source };
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|
union content_msg_data msg_data;
|
|
|
|
const char *data;
|
|
|
|
unsigned long size;
|
2012-10-25 14:12:41 +04:00
|
|
|
char *title;
|
2011-08-31 16:12:41 +04:00
|
|
|
|
2011-09-05 03:50:14 +04:00
|
|
|
/* check image header is valid and get width/height */
|
|
|
|
data = content__get_source_data(c, &size);
|
|
|
|
|
2011-10-30 19:00:32 +04:00
|
|
|
cinfo.err = jpeg_std_error(&jerr);
|
|
|
|
jerr.error_exit = nsjpeg_error_exit;
|
|
|
|
jerr.output_message = nsjpeg_error_log;
|
|
|
|
|
|
|
|
if (setjmp(setjmp_buffer)) {
|
2011-09-05 03:50:14 +04:00
|
|
|
jpeg_destroy_decompress(&cinfo);
|
|
|
|
|
|
|
|
msg_data.error = nsjpeg_error_buffer;
|
|
|
|
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
|
|
|
|
return false;
|
2011-08-31 16:12:41 +04:00
|
|
|
}
|
2011-10-30 19:00:32 +04:00
|
|
|
|
2011-09-05 03:50:14 +04:00
|
|
|
jpeg_create_decompress(&cinfo);
|
2011-10-30 19:00:32 +04:00
|
|
|
cinfo.client_data = &setjmp_buffer;
|
2011-09-05 03:50:14 +04:00
|
|
|
source_mgr.next_input_byte = (unsigned char *) data;
|
|
|
|
source_mgr.bytes_in_buffer = size;
|
|
|
|
cinfo.src = &source_mgr;
|
|
|
|
jpeg_read_header(&cinfo, TRUE);
|
|
|
|
cinfo.out_color_space = JCS_RGB;
|
|
|
|
cinfo.dct_method = JDCT_ISLOW;
|
2003-02-26 00:00:27 +03:00
|
|
|
|
2011-09-05 03:50:14 +04:00
|
|
|
jpeg_calc_output_dimensions(&cinfo);
|
2003-02-26 00:00:27 +03:00
|
|
|
|
2011-09-05 03:50:14 +04:00
|
|
|
c->width = cinfo.output_width;
|
|
|
|
c->height = cinfo.output_height;
|
|
|
|
c->size = c->width * c->height * 4;
|
|
|
|
|
|
|
|
jpeg_destroy_decompress(&cinfo);
|
2009-06-30 17:02:23 +04:00
|
|
|
|
2011-09-05 03:50:14 +04:00
|
|
|
image_cache_add(c, NULL, jpeg_cache_convert);
|
2009-06-30 17:02:23 +04:00
|
|
|
|
2012-10-25 14:12:41 +04:00
|
|
|
/* set title text */
|
|
|
|
title = messages_get_buff("JPEGTitle",
|
2012-10-24 21:22:45 +04:00
|
|
|
nsurl_access_leaf(llcache_handle_get_url(c->llcache)),
|
|
|
|
c->width, c->height);
|
2012-10-25 14:12:41 +04:00
|
|
|
if (title != NULL) {
|
|
|
|
content__set_title(c, title);
|
|
|
|
free(title);
|
|
|
|
}
|
2011-09-05 03:50:14 +04:00
|
|
|
|
|
|
|
content_set_ready(c);
|
|
|
|
content_set_done(c);
|
|
|
|
content_set_status(c, ""); /* Done: update status bar */
|
|
|
|
|
|
|
|
return true;
|
2006-02-21 23:49:12 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-05-08 19:14:21 +04:00
|
|
|
|
2004-03-24 01:17:08 +03:00
|
|
|
/**
|
2011-05-08 19:14:21 +04:00
|
|
|
* Clone content.
|
2004-03-24 01:17:08 +03:00
|
|
|
*/
|
2011-05-08 19:14:21 +04:00
|
|
|
static nserror nsjpeg_clone(const struct content *old, struct content **newc)
|
2010-04-04 16:41:19 +04:00
|
|
|
{
|
2011-09-05 03:50:14 +04:00
|
|
|
struct content *jpeg_c;
|
2011-05-07 00:40:09 +04:00
|
|
|
nserror error;
|
|
|
|
|
2012-10-03 22:24:58 +04:00
|
|
|
jpeg_c = calloc(1, sizeof(struct content));
|
2011-05-08 19:14:21 +04:00
|
|
|
if (jpeg_c == NULL)
|
2011-05-07 00:40:09 +04:00
|
|
|
return NSERROR_NOMEM;
|
|
|
|
|
2011-09-05 03:50:14 +04:00
|
|
|
error = content__clone(old, jpeg_c);
|
2011-05-07 00:40:09 +04:00
|
|
|
if (error != NSERROR_OK) {
|
2011-09-05 03:50:14 +04:00
|
|
|
content_destroy(jpeg_c);
|
2011-05-07 00:40:09 +04:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2011-05-08 19:14:21 +04:00
|
|
|
/* re-convert if the content is ready */
|
|
|
|
if ((old->status == CONTENT_STATUS_READY) ||
|
|
|
|
(old->status == CONTENT_STATUS_DONE)) {
|
2011-09-05 03:50:14 +04:00
|
|
|
if (nsjpeg_convert(jpeg_c) == false) {
|
|
|
|
content_destroy(jpeg_c);
|
2011-05-07 00:40:09 +04:00
|
|
|
return NSERROR_CLONE_FAILED;
|
|
|
|
}
|
2010-04-04 16:41:19 +04:00
|
|
|
}
|
|
|
|
|
2011-09-05 03:50:14 +04:00
|
|
|
*newc = jpeg_c;
|
2011-05-07 00:40:09 +04:00
|
|
|
|
|
|
|
return NSERROR_OK;
|
|
|
|
}
|
|
|
|
|
2011-05-08 19:14:21 +04:00
|
|
|
static const content_handler nsjpeg_content_handler = {
|
2011-05-09 19:32:34 +04:00
|
|
|
.create = nsjpeg_create,
|
|
|
|
.data_complete = nsjpeg_convert,
|
2011-09-05 03:50:14 +04:00
|
|
|
.destroy = image_cache_destroy,
|
|
|
|
.redraw = image_cache_redraw,
|
2011-05-09 19:32:34 +04:00
|
|
|
.clone = nsjpeg_clone,
|
2011-09-05 03:50:14 +04:00
|
|
|
.get_internal = image_cache_get_internal,
|
|
|
|
.type = image_cache_content_type,
|
2011-05-09 19:32:34 +04:00
|
|
|
.no_share = false,
|
2011-05-08 19:14:21 +04:00
|
|
|
};
|
|
|
|
|
2011-08-27 12:43:51 +04:00
|
|
|
static const char *nsjpeg_types[] = {
|
|
|
|
"image/jpeg",
|
|
|
|
"image/jpg",
|
|
|
|
"image/pjpeg"
|
|
|
|
};
|
2011-05-08 19:14:21 +04:00
|
|
|
|
2011-08-27 12:43:51 +04:00
|
|
|
CONTENT_FACTORY_REGISTER_TYPES(nsjpeg, nsjpeg_types, nsjpeg_content_handler);
|