const Graphics::Surface *RlfAnimation::getNextFrame() {
assert(_currentFrame + 1 < (int)_frameCount);
if (_stream) {
applyFrameToCurrent(readNextFrame());
} else {
applyFrameToCurrent(_currentFrame + 1);
}
_currentFrame++;
return &_currentFrameBuffer;
}
void RlfAnimation::seekToFrame(int frameNumber) {
assert(!_stream);
assert(frameNumber < (int)_frameCount || frameNumber >= -1);
if (frameNumber == -1) {
_currentFrame = -1;
return;
}
int closestFrame = _currentFrame;
int distance = (int)frameNumber - _currentFrame;
for (uint i = 0; i < _completeFrames.size(); ++i) {
int newDistance = (int)frameNumber - (int)(_completeFrames[i]);
if (newDistance > 0 && (closestFrame == -1 || newDistance < distance)) {
closestFrame = _completeFrames[i];
distance = newDistance;
}
}
for (int i = closestFrame; i <= frameNumber; ++i) {
applyFrameToCurrent(i);
}
_currentFrame = frameNumber;
}
void RlfAnimation::seekToFrame(int frameNumber) {
assert(!_stream);
assert(frameNumber < (int)_frameCount || frameNumber >= -1);
if (_nextFrame == frameNumber)
return;
if (frameNumber < 0) {
_nextFrame = 0;
return;
}
int closestFrame = _nextFrame;
int distance = (int)frameNumber - _nextFrame;
if (distance < 0) {
for (uint i = 0; i < _completeFrames.size(); ++i) {
if ((int)_completeFrames[i] > frameNumber)
break;
closestFrame = _completeFrames[i];
}
} else {
for (uint i = 0; i < _completeFrames.size(); ++i) {
int newDistance = (int)frameNumber - (int)(_completeFrames[i]);
if (newDistance < 0)
break;
if (newDistance < distance) {
closestFrame = _completeFrames[i];
distance = newDistance;
}
}
}
for (int i = closestFrame; i < frameNumber; ++i) {
applyFrameToCurrent(i);
}
_nextFrame = frameNumber;
}
