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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "common/stream.h"
#include "common/substream.h"
#include "common/memstream.h"
#include "image/icocur.h"
#include "graphics/wincursor.h"
namespace Image {
IcoCurDecoder::IcoCurDecoder() : _type(kTypeInvalid), _stream(nullptr), _disposeAfterUse(DisposeAfterUse::NO) {
}
IcoCurDecoder::~IcoCurDecoder() {
close();
}
void IcoCurDecoder::close() {
if (_disposeAfterUse == DisposeAfterUse::YES && _stream != nullptr)
delete _stream;
_stream = nullptr;
_type = kTypeInvalid;
_items.clear();
}
bool IcoCurDecoder::open(Common::SeekableReadStream &stream, DisposeAfterUse::Flag disposeAfterUse) {
close();
_stream = &stream;
_disposeAfterUse = disposeAfterUse;
bool loadedOK = load();
if (!loadedOK)
close();
return loadedOK;
}
bool IcoCurDecoder::load() {
uint8 iconDirData[6];
if (_stream->read(iconDirData, 6) != 6)
return false;
if (iconDirData[0] != 0 || iconDirData[1] != 0 || (iconDirData[2] != 1 && iconDirData[2] != 2) || iconDirData[3] != 0) {
warning("Malformed ICO/CUR header");
return false;
}
uint16 numImages = READ_LE_UINT16(iconDirData + 4);
_type = static_cast<Type>(iconDirData[2]);
if (numImages == 0)
return true;
uint32 dirSize = static_cast<uint32>(numImages) * 16;
Common::Array<uint8> iconDir;
iconDir.resize(dirSize);
if (_stream->read(&iconDir[0], dirSize) != dirSize)
return false;
_items.resize(numImages);
for (uint i = 0; i < numImages; i++) {
const uint8 *entryData = &iconDir[i * 16u];
Item &item = _items[i];
item.width = entryData[0];
if (item.width == 0)
item.width = 256;
item.height = entryData[1];
if (item.height == 0)
item.height = 256;
item.numColors = entryData[2];
item.data.ico.numPlanes = READ_LE_UINT16(entryData + 4);
item.data.ico.bitsPerPixel = READ_LE_UINT16(entryData + 6);
item.dataSize = READ_LE_UINT32(entryData + 8);
item.dataOffset = READ_LE_UINT32(entryData + 12);
}
return true;
}
IcoCurDecoder::Type IcoCurDecoder::getType() const {
return _type;
}
uint IcoCurDecoder::numItems() const {
return _items.size();
}
const IcoCurDecoder::Item &IcoCurDecoder::getItem(uint itemIndex) const {
return _items[itemIndex];
}
Graphics::Cursor *IcoCurDecoder::loadItemAsCursor(uint itemIndex) const {
const IcoCurDecoder::Item &dirItem = _items[itemIndex];
if (_type != kTypeCUR)
warning("ICO/CUR file type wasn't a cursor, but is being requested as a cursor anyway");
if (static_cast<int64>(dirItem.dataOffset) > _stream->size()) {
warning("ICO/CUR data offset was outside of the file");
return nullptr;
}
if (_stream->size() - static_cast<int64>(dirItem.dataOffset) < static_cast<int64>(dirItem.dataSize)) {
warning("ICO/CUR data bounds were outside of the file");
return nullptr;
}
Common::SeekableSubReadStream substream(_stream, dirItem.dataOffset, dirItem.dataOffset + dirItem.dataSize);
return Graphics::loadWindowsCursorFromDIB(substream, dirItem.data.cur.hotspotX, dirItem.data.cur.hotspotY);
}
} // End of namespace Image
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