2009-08-21 13:52:43 +00:00
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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2014-02-18 01:34:20 +00:00
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*
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2009-08-21 13:52:43 +00:00
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* This program 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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2014-02-18 01:34:20 +00:00
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*
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2009-08-21 13:52:43 +00:00
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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2013-08-11 21:36:57 +00:00
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// libjpeg uses forbidden symbols in its header. Thus, we need to allow them
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// here.
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#define FORBIDDEN_SYMBOL_ALLOW_ALL
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2014-02-28 02:27:23 +00:00
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#include "image/jpeg.h"
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2009-08-21 13:52:43 +00:00
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2011-04-24 08:34:27 +00:00
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#include "common/debug.h"
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2009-08-21 13:52:43 +00:00
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#include "common/endian.h"
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2010-11-19 01:37:04 +00:00
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#include "common/stream.h"
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2011-04-24 08:34:27 +00:00
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#include "common/textconsole.h"
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2014-02-28 02:27:23 +00:00
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#include "graphics/pixelformat.h"
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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#ifdef USE_JPEG
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// The original release of libjpeg v6b did not contain any extern "C" in case
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// its header files are included in a C++ environment. To avoid any linking
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// issues we need to add it on our own.
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extern "C" {
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#include <jpeglib.h>
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#include <jerror.h>
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}
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#endif
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2009-08-21 13:52:43 +00:00
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2014-02-28 02:27:23 +00:00
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namespace Image {
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2009-08-21 13:52:43 +00:00
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2014-02-28 02:27:23 +00:00
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JPEGDecoder::JPEGDecoder() : _surface(), _colorSpace(kColorSpaceRGBA) {
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2009-08-21 13:52:43 +00:00
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}
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2011-07-03 02:05:45 +00:00
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JPEGDecoder::~JPEGDecoder() {
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destroy();
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2009-08-21 13:52:43 +00:00
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}
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2014-02-28 02:27:23 +00:00
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const Graphics::Surface *JPEGDecoder::getSurface() const {
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2013-08-11 22:53:34 +00:00
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return &_surface;
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2011-01-18 16:18:10 +00:00
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}
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2011-07-03 02:05:45 +00:00
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void JPEGDecoder::destroy() {
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2013-08-11 22:53:34 +00:00
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_surface.free();
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2009-08-21 13:52:43 +00:00
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}
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2014-02-28 02:27:23 +00:00
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const Graphics::Surface *JPEGDecoder::decodeImage(Common::SeekableReadStream *stream) {
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if (!loadStream(*stream))
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return 0;
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return getSurface();
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}
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Graphics::PixelFormat JPEGDecoder::getPixelFormat() const {
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return _surface.format;
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}
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2013-08-11 21:36:57 +00:00
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#ifdef USE_JPEG
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namespace {
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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#define JPEG_BUFFER_SIZE 4096
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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struct StreamSource : public jpeg_source_mgr {
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Common::SeekableReadStream *stream;
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bool startOfFile;
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JOCTET buffer[JPEG_BUFFER_SIZE];
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};
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2010-01-25 01:39:44 +00:00
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2013-08-11 21:36:57 +00:00
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void initSource(j_decompress_ptr cinfo) {
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StreamSource *source = (StreamSource *)cinfo->src;
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source->startOfFile = true;
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2009-08-21 13:52:43 +00:00
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}
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2013-08-11 21:36:57 +00:00
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boolean fillInputBuffer(j_decompress_ptr cinfo) {
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StreamSource *source = (StreamSource *)cinfo->src;
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2010-01-25 01:39:44 +00:00
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2013-08-11 21:36:57 +00:00
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uint32 bufferSize = source->stream->read((byte *)source->buffer, sizeof(source->buffer));
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if (bufferSize == 0) {
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if (source->startOfFile) {
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// An empty file is a fatal error
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ERREXIT(cinfo, JERR_INPUT_EMPTY);
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} else {
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// Otherwise we insert an EOF marker
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WARNMS(cinfo, JWRN_JPEG_EOF);
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source->buffer[0] = (JOCTET)0xFF;
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source->buffer[1] = (JOCTET)JPEG_EOI;
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bufferSize = 2;
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2009-08-21 13:52:43 +00:00
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}
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}
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2013-08-11 21:36:57 +00:00
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source->next_input_byte = source->buffer;
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source->bytes_in_buffer = bufferSize;
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source->startOfFile = false;
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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return TRUE;
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}
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2012-02-08 08:45:50 +00:00
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2013-08-11 21:36:57 +00:00
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void skipInputData(j_decompress_ptr cinfo, long numBytes) {
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StreamSource *source = (StreamSource *)cinfo->src;
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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if (numBytes > 0) {
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if (numBytes > (long)source->bytes_in_buffer) {
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// In case we need to skip more bytes than there are in the buffer
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// we will skip the remaining data and fill the buffer again
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numBytes -= (long)source->bytes_in_buffer;
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2012-02-08 08:45:50 +00:00
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2013-08-11 21:36:57 +00:00
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// Skip the remaining bytes
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source->stream->skip(numBytes);
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2012-02-08 08:45:50 +00:00
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2013-08-11 21:36:57 +00:00
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// Fill up the buffer again
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(*source->fill_input_buffer)(cinfo);
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} else {
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source->next_input_byte += (size_t)numBytes;
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source->bytes_in_buffer -= (size_t)numBytes;
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2012-02-08 08:45:50 +00:00
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}
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2009-12-24 08:26:13 +00:00
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}
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2009-08-21 13:52:43 +00:00
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}
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2013-08-11 21:36:57 +00:00
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void termSource(j_decompress_ptr cinfo) {
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2009-08-21 13:52:43 +00:00
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}
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2013-08-11 21:36:57 +00:00
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void jpeg_scummvm_src(j_decompress_ptr cinfo, Common::SeekableReadStream *stream) {
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StreamSource *source;
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2012-02-08 08:45:50 +00:00
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2013-08-11 21:36:57 +00:00
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// Initialize the source in case it has not been done yet.
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if (cinfo->src == NULL) {
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cinfo->src = (jpeg_source_mgr *)(*cinfo->mem->alloc_small)((j_common_ptr)cinfo, JPOOL_PERMANENT, sizeof(StreamSource));
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2012-02-08 08:45:50 +00:00
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}
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2013-08-11 21:36:57 +00:00
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source = (StreamSource *)cinfo->src;
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source->init_source = &initSource;
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source->fill_input_buffer = &fillInputBuffer;
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source->skip_input_data = &skipInputData;
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source->resync_to_restart = &jpeg_resync_to_restart;
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source->term_source = &termSource;
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source->bytes_in_buffer = 0;
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source->next_input_byte = NULL;
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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source->stream = stream;
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}
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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void errorExit(j_common_ptr cinfo) {
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char buffer[JMSG_LENGTH_MAX];
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(*cinfo->err->format_message)(cinfo, buffer);
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// This function is not allowed to return to the caller, thus we simply
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// error out with our error handling here.
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error("%s", buffer);
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2009-08-21 13:52:43 +00:00
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}
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2013-08-11 21:36:57 +00:00
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void outputMessage(j_common_ptr cinfo) {
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char buffer[JMSG_LENGTH_MAX];
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(*cinfo->err->format_message)(cinfo, buffer);
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// Is using debug here a good idea? Or do we want to ignore all libjpeg
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// messages?
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debug(3, "libjpeg: %s", buffer);
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2012-02-09 14:59:19 +00:00
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}
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2011-02-06 13:43:40 +00:00
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2013-08-11 21:36:57 +00:00
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} // End of anonymous namespace
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#endif
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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bool JPEGDecoder::loadStream(Common::SeekableReadStream &stream) {
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#ifdef USE_JPEG
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// Reset member variables from previous decodings
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destroy();
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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jpeg_decompress_struct cinfo;
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jpeg_error_mgr jerr;
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2010-01-25 01:39:44 +00:00
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2013-08-11 21:36:57 +00:00
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// Initialize error handling callbacks
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cinfo.err = jpeg_std_error(&jerr);
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cinfo.err->error_exit = &errorExit;
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cinfo.err->output_message = &outputMessage;
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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// Initialize the decompression structure
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jpeg_create_decompress(&cinfo);
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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// Initialize our buffer handling
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jpeg_scummvm_src(&cinfo, &stream);
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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// Read the file header
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jpeg_read_header(&cinfo, TRUE);
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2009-08-21 13:52:43 +00:00
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2013-08-11 22:53:34 +00:00
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// We can request YUV output because Groovie requires it
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switch (_colorSpace) {
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case kColorSpaceRGBA:
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cinfo.out_color_space = JCS_RGB;
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break;
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case kColorSpaceYUV:
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cinfo.out_color_space = JCS_YCbCr;
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break;
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}
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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// Actually start decompressing the image
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jpeg_start_decompress(&cinfo);
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2009-08-21 13:52:43 +00:00
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2013-08-11 22:53:34 +00:00
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// Allocate buffers for the output data
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switch (_colorSpace) {
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case kColorSpaceRGBA:
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// We use RGBA8888 in this scenario
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_surface.create(cinfo.output_width, cinfo.output_height, Graphics::PixelFormat(4, 8, 8, 8, 0, 24, 16, 8, 0));
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break;
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case kColorSpaceYUV:
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// We use YUV with 3 bytes per pixel otherwise.
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// This is pretty ugly since our PixelFormat cannot express YUV...
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_surface.create(cinfo.output_width, cinfo.output_height, Graphics::PixelFormat(3, 0, 0, 0, 0, 0, 0, 0, 0));
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break;
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}
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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// Allocate buffer for one scanline
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2013-08-18 16:21:19 +00:00
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assert(cinfo.output_components == 3);
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2013-08-11 21:36:57 +00:00
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JDIMENSION pitch = cinfo.output_width * cinfo.output_components;
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2013-08-18 16:21:19 +00:00
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assert(_surface.pitch >= pitch);
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2013-08-11 21:36:57 +00:00
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JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray)((j_common_ptr)&cinfo, JPOOL_IMAGE, pitch, 1);
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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// Go through the image data scanline by scanline
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while (cinfo.output_scanline < cinfo.output_height) {
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2013-08-11 22:53:34 +00:00
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byte *dst = (byte *)_surface.getBasePtr(0, cinfo.output_scanline);
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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jpeg_read_scanlines(&cinfo, buffer, 1);
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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const byte *src = buffer[0];
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2013-08-11 22:53:34 +00:00
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switch (_colorSpace) {
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case kColorSpaceRGBA: {
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for (int remaining = cinfo.output_width; remaining > 0; --remaining) {
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byte r = *src++;
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byte g = *src++;
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byte b = *src++;
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// We need to insert a alpha value of 255 (opaque) here.
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#ifdef SCUMM_BIG_ENDIAN
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*dst++ = r;
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*dst++ = g;
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*dst++ = b;
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*dst++ = 0xFF;
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#else
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*dst++ = 0xFF;
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*dst++ = b;
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*dst++ = g;
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*dst++ = r;
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#endif
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}
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} break;
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case kColorSpaceYUV:
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2013-08-18 16:21:19 +00:00
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memcpy(dst, src, pitch);
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2013-08-11 22:53:34 +00:00
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break;
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2009-08-21 13:52:43 +00:00
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}
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}
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2013-08-11 21:36:57 +00:00
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// We are done with decompressing, thus free all the data
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jpeg_finish_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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2009-08-21 13:52:43 +00:00
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2013-08-11 21:36:57 +00:00
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return true;
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#else
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return false;
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#endif
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2009-08-21 13:52:43 +00:00
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}
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} // End of Graphics namespace
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