/** Copy texture to pixels. Involves video memory to main memory transfer (slow). */
public void get(int[] pixels) {
if (pixels == null) {
throw new RuntimeException("Trying to copy texture to null pixels array");
}
if (pixels.length != width * height) {
throw new RuntimeException("Trying to copy texture to pixels array of " + "wrong size");
}
if (tempFbo == null) {
tempFbo = new FrameBuffer(parent, glWidth, glHeight);
}
// Attaching the texture to the color buffer of a FBO, binding the FBO and
// reading the pixels from the current draw buffer (which is the color
// buffer of the FBO).
tempFbo.setColorBuffer(this);
pg.pushFramebuffer();
pg.setFramebuffer(tempFbo);
tempFbo.readPixels();
pg.popFramebuffer();
tempFbo.getPixels(pixels);
convertToARGB(pixels);
if (invertedX) flipArrayOnX(pixels, 1);
if (invertedY) flipArrayOnY(pixels, 1);
}
public void getBufferPixels(int[] pixels) {
BufferData data = null;
if (usedBuffers != null && 0 < usedBuffers.size()) {
// the last used buffer is the one currently stored in the opengl the
// texture
data = usedBuffers.getLast();
} else if (bufferCache != null && 0 < bufferCache.size()) {
// The first buffer in the cache will be uploaded to the opengl texture
// the next time it is rendered
data = bufferCache.getFirst();
}
if (data != null) {
data.rgbBuf.rewind();
data.rgbBuf.get(pixels);
convertToARGB(pixels);
}
}
protected boolean bufferUpdate(int[] pixels) {
BufferData data = null;
try {
data = bufferCache.remove(0);
} catch (NoSuchElementException ex) {
PGraphics.showWarning("Don't have pixel data to copy to texture");
}
if (data != null) {
if ((data.w != width) || (data.h != height)) {
init(data.w, data.h);
}
setNative(data.rgbBuf, 0, 0, width, height);
data.rgbBuf.get(pixels);
convertToARGB(pixels);
data.dispose();
return true;
} else {
return false;
}
}
