public DrawStream(int bufSize) {
mVertBuf = DrawUtil.alloc(bufSize);
// 12 is smallest possible vert size.
// 6/4 is the max ration between indices and verts (for drawing quads)
// 4 at the end is bytes per index.
mIndBuf = DrawUtil.alloc(bufSize / 12 * 6 / 4 * 4);
}
private void begin(Writer writer, IndWriter indexer, int mode, int blockSize) {
mDraw.checkErr();
mActiveWriter = writer;
mActiveIndexer = indexer;
mActiveMode = mode;
mVertBuf.clear();
int bytes = mVertBuf.capacity();
int vertBytes = writer.mVertWriter.bytesPerElem();
mActiveCap = (bytes / (vertBytes * blockSize)) * blockSize;
mActivePos = 0;
writer.mProgram.bind(mDraw);
writer.mVao.bind(mDraw);
mVbo.bind(mDraw);
if (indexer != null) {
indexer.reset();
mIndBuf.clear();
mIbo.bind(mDraw);
}
DrawUtil.checkErr();
}
public void end() {
if (mActiveWriter == null) {
return;
}
if (mActivePos > 0) {
flush();
}
if (mActiveIndexer != null) {
GLES30.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
mActiveIndexer = null;
}
mActiveWriter.mVao.unbind(mDraw);
mActiveWriter.mProgram.unbind(mDraw);
DrawUtil.checkErr();
}