public void preFrame(float tpf) {
if (filters.isEmpty() || lastFilterIndex == -1) {
// If the camera is initialized and there are no filter to render, the camera viewport is
// restored as it was
if (cameraInit) {
viewPort.getCamera().resize(originalWidth, originalHeight, true);
viewPort.getCamera().setViewPort(left, right, bottom, top);
viewPort.setOutputFrameBuffer(outputBuffer);
cameraInit = false;
}
} else {
if (renderFrameBufferMS != null) {
viewPort.setOutputFrameBuffer(renderFrameBufferMS);
} else {
viewPort.setOutputFrameBuffer(renderFrameBuffer);
}
// init of the camera if it wasn't already
if (!cameraInit) {
viewPort.getCamera().resize(width, height, true);
viewPort.getCamera().setViewPort(0, 1, 0, 1);
}
}
for (Iterator<Filter> it = filters.iterator(); it.hasNext(); ) {
Filter filter = it.next();
if (filter.isEnabled()) {
filter.preFrame(tpf);
}
}
}
public void cleanup() {
if (viewPort != null) {
// reseting the viewport camera viewport to its initial value
viewPort.getCamera().resize(originalWidth, originalHeight, true);
viewPort.getCamera().setViewPort(left, right, bottom, top);
viewPort.setOutputFrameBuffer(outputBuffer);
viewPort = null;
for (Filter filter : filters) {
filter.cleanup(renderer);
}
}
}
public void reshape(ViewPort vp, int w, int h) {
// this has no effect at first init but is useful when resizing the canvas with multi views
Camera cam = vp.getCamera();
cam.setViewPort(left, right, bottom, top);
// resizing the camera to fit the new viewport and saving original dimensions
cam.resize(w, h, false);
left = cam.getViewPortLeft();
right = cam.getViewPortRight();
top = cam.getViewPortTop();
bottom = cam.getViewPortBottom();
originalWidth = w;
originalHeight = h;
cam.setViewPort(0, 1, 0, 1);
// computing real dimension of the viewport and resizing he camera
width = (int) (w * (Math.abs(right - left)));
height = (int) (h * (Math.abs(bottom - top)));
width = Math.max(1, width);
height = Math.max(1, height);
cam.resize(width, height, false);
cameraInit = true;
computeDepth = false;
if (renderFrameBuffer == null) {
outputBuffer = viewPort.getOutputFrameBuffer();
}
Collection<Caps> caps = renderer.getCaps();
// antialiasing on filters only supported in opengl 3 due to depth read problem
if (numSamples > 1 && caps.contains(Caps.FrameBufferMultisample)) {
renderFrameBufferMS = new FrameBuffer(width, height, numSamples);
if (caps.contains(Caps.OpenGL31)) {
Texture2D msColor = new Texture2D(width, height, numSamples, Format.RGBA8);
Texture2D msDepth = new Texture2D(width, height, numSamples, Format.Depth);
renderFrameBufferMS.setDepthTexture(msDepth);
renderFrameBufferMS.setColorTexture(msColor);
filterTexture = msColor;
depthTexture = msDepth;
} else {
renderFrameBufferMS.setDepthBuffer(Format.Depth);
renderFrameBufferMS.setColorBuffer(Format.RGBA8);
}
}
if (numSamples <= 1 || !caps.contains(Caps.OpenGL31)) {
renderFrameBuffer = new FrameBuffer(width, height, 1);
renderFrameBuffer.setDepthBuffer(Format.Depth);
filterTexture = new Texture2D(width, height, Format.RGBA8);
renderFrameBuffer.setColorTexture(filterTexture);
}
for (Iterator<Filter> it = filters.iterator(); it.hasNext(); ) {
Filter filter = it.next();
initFilter(filter, vp);
}
if (renderFrameBufferMS != null) {
viewPort.setOutputFrameBuffer(renderFrameBufferMS);
} else {
viewPort.setOutputFrameBuffer(renderFrameBuffer);
}
}