void Frame::readChannel(Common::SeekableSubReadStreamEndian &stream, uint16 offset, uint16 size) {
if (offset >= 32) {
if (size <= 16)
readSprite(stream, offset, size);
else {
//read > 1 sprites channel
while (size > 16) {
byte spritePosition = (offset - 32) / 16;
uint16 nextStart = (spritePosition + 1) * 16 + 32;
uint16 needSize = nextStart - offset;
readSprite(stream, offset, needSize);
offset += needSize;
size -= needSize;
}
readSprite(stream, offset, size);
}
} else {
readMainChannels(stream, offset, size);
}
}
void Frame::readSprite(Common::SeekableSubReadStreamEndian &stream, uint16 offset, uint16 size) {
uint16 spritePosition = (offset - 32) / 16;
uint16 spriteStart = spritePosition * 16 + 32;
uint16 fieldPosition = offset - spriteStart;
uint16 finishPosition = fieldPosition + size;
Sprite &sprite = *_sprites[spritePosition];
while (fieldPosition < finishPosition) {
switch (fieldPosition) {
case kSpritePositionUnk1:
/*byte x1 = */ stream.readByte();
fieldPosition++;
break;
case kSpritePositionEnabled:
sprite._enabled = (stream.readByte() != 0);
fieldPosition++;
break;
case kSpritePositionUnk2:
/*byte x2 = */ stream.readUint16();
fieldPosition += 2;
break;
case kSpritePositionFlags:
sprite._flags = stream.readUint16();
sprite._ink = static_cast<InkType>(sprite._flags & 0x3f);
if (sprite._flags & 0x40)
sprite._trails = 1;
else
sprite._trails = 0;
fieldPosition += 2;
break;
case kSpritePositionCastId:
sprite._castId = stream.readUint16();
fieldPosition += 2;
break;
case kSpritePositionY:
sprite._startPoint.y = stream.readUint16();
fieldPosition += 2;
break;
case kSpritePositionX:
sprite._startPoint.x = stream.readUint16();
fieldPosition += 2;
break;
case kSpritePositionWidth:
sprite._width = stream.readUint16();
fieldPosition += 2;
break;
case kSpritePositionHeight:
sprite._height = stream.readUint16();
fieldPosition += 2;
break;
default:
//end cycle, go to next sprite channel
readSprite(stream, spriteStart + 16, finishPosition - fieldPosition);
fieldPosition = finishPosition;
break;
}
}
}
// Loads the old save by constructing a new save containing the old save's data
bool SaveConverter_v3::load() {
clear();
uint32 varSize = SaveHandler::getVarSize(_vm);
if (varSize == 0)
return false;
Common::InSaveFile *save;
int type = isOldSave(&save);
// Test if it's an old savd
if ((type == 0) || !save)
return false;
displayWarning();
bool screenShot;
uint32 screenShotWidth;
uint32 screenShotHeight;
getScreenShotProps(type, screenShot, screenShotWidth, screenShotHeight);
SaveWriter writer(screenShot ? 3 : 2, 0);
SavePartInfo *info = readInfo(*save, kSlotNameLength, false);
if (!info)
return loadFail(0, 0, 0, save);
SavePartVars *vars = readVars(*save, varSize, true);
if (!vars)
return loadFail(info, 0, 0, save);
if (screenShot) {
SavePartSprite *sprite = readSprite(*save, screenShotWidth, screenShotHeight, true);
if (!sprite)
return loadFail(info, vars, 0, save);
if (!writer.writePart(2, sprite))
return loadFail(info, vars, sprite, save);
delete sprite;
}
// We don't need the save anymore
delete save;
// Write all parts
if (!writer.writePart(0, info))
return loadFail(info, vars, 0, 0);
if (!writer.writePart(1, vars))
return loadFail(info, vars, 0, 0);
// We don't need those anymore
delete info;
delete vars;
// Create the final read stream
if (!createStream(writer))
return loadFail(0, 0, 0, 0);
return true;
}
