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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software{} you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation{} either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY{} without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program{} if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "glk/frotz/pics.h"
#include "glk/frotz/pics_decoder.h"
#include "glk/glk.h"
#include "common/algorithm.h"
#include "common/memstream.h"
namespace Glk {
namespace Frotz {
enum {
PIC_FILE_HEADER_FLAGS = 1,
PIC_FILE_HEADER_NUM_IMAGES = 4,
PIC_FILE_HEADER_ENTRY_SIZE = 8,
PIC_FILE_HEADER_VERSION = 14
};
Pics::Pics() : Common::Archive(), _filename(getFilename()) {
Common::File f;
if (!f.open(_filename))
error("Error reading Pics file");
_palette = new Common::Array<byte>();
Common::Array<uint> offsets;
byte buffer[16];
f.read(buffer, 16);
_index.resize(READ_LE_UINT16(&buffer[PIC_FILE_HEADER_NUM_IMAGES]));
_entrySize = buffer[PIC_FILE_HEADER_ENTRY_SIZE];
_version = buffer[PIC_FILE_HEADER_FLAGS];
assert(_entrySize >= 8 && _entrySize <= 14);
// Iterate through loading the index
for (uint idx = 0; idx < _index.size(); ++idx) {
Entry &e = _index[idx];
f.read(buffer, _entrySize);
e._number = READ_LE_UINT16(buffer);
e._width = READ_LE_UINT16(buffer + 2);
e._height = READ_LE_UINT16(buffer + 4);
e._flags = READ_LE_UINT16(buffer + 6);
if (_entrySize >= 11) {
e._dataOffset = READ_BE_UINT32(buffer + 7) & 0xffffff;
if (e._dataOffset)
offsets.push_back(e._dataOffset);
if (_entrySize == 14) {
e._paletteOffset = READ_BE_UINT32(buffer + 10) & 0xffffff;
}
}
if (e._dataOffset)
e._filename = Common::String::format("pic%u.raw", e._number);
else
e._filename = Common::String::format("pic%u.rect", e._number);
}
// Further processing of index to calculate data sizes
Common::sort(offsets.begin(), offsets.end());
for (uint idx = 0; idx < _index.size(); ++idx) {
Entry &e = _index[idx];
if (!e._dataOffset)
continue;
// Find the entry in the offsets array
uint oidx = 0;
while (oidx < offsets.size() && offsets[oidx] != e._dataOffset)
++oidx;
// Set the size
e._dataSize = (oidx == (offsets.size() - 1) ? f.size() : offsets[oidx + 1]) - e._dataOffset;
}
f.close();
}
Pics::~Pics() {
delete _palette;
}
Common::String Pics::getFilename() {
Common::String filename = g_vm->getFilename();
while (filename.contains('.'))
filename.deleteLastChar();
return filename + ".mg1";
}
bool Pics::exists() {
return Common::File::exists(getFilename());
}
bool Pics::hasFile(const Common::String &name) const {
for (uint idx = 0; idx < _index.size(); ++idx) {
if (_index[idx]._filename.equalsIgnoreCase(name))
return true;
}
return false;
}
int Pics::listMembers(Common::ArchiveMemberList &list) const {
for (uint idx = 0; idx < _index.size(); ++idx) {
list.push_back(Common::ArchiveMemberList::value_type(new Common::GenericArchiveMember(_index[idx]._filename, this)));
}
return (int)_index.size();
}
const Common::ArchiveMemberPtr Pics::getMember(const Common::String &name) const {
if (!hasFile(name))
return Common::ArchiveMemberPtr();
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
}
Common::SeekableReadStream *Pics::createReadStreamForMember(const Common::String &name) const {
PictureDecoder decoder;
for (uint idx = 0; idx < _index.size(); ++idx) {
const Entry &e = _index[idx];
if (e._filename.equalsIgnoreCase(name)) {
Common::File f;
Common::SeekableReadStream *dest;
if (!f.open(_filename))
error("Reading failed");
if (e._dataSize) {
loadPalette(f, e, *_palette);
f.seek(e._dataOffset);
Common::SeekableReadStream *src = f.readStream(e._dataSize);
dest = decoder.decode(*src, e._flags, *_palette, kMCGA, e._width, e._height);
delete src;
} else {
byte *rect = (byte *)malloc(2 * sizeof(uint16));
WRITE_LE_UINT16(rect, e._width);
WRITE_LE_UINT16(rect + 2, e._height);
dest = new Common::MemoryReadStream(rect, 2 * sizeof(uint16), DisposeAfterUse::YES);
}
f.close();
return dest;
}
}
return nullptr;
}
void Pics::loadPalette(Common::File &f, const Entry &e, Common::Array<byte> &palette) const {
if (e._paletteOffset) {
// Read in the image's palette
assert(e._paletteOffset);
f.seek(e._paletteOffset);
_palette->resize(f.readByte() * 3);
f.read(&(*_palette)[0], _palette->size());
}
if (e._flags & 1) {
byte *entry = &palette[(e._flags >> 12) * 3];
Common::fill(entry, entry + 3, 0);
}
}
} // End of namespace Frotz
} // End of namespace Glk
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