void QGLIndexBufferPrivate::append
(const QGLIndexBufferPrivate *other, uint offset, int start)
{
if (elementType == GL_UNSIGNED_SHORT &&
other->elementType == GL_UNSIGNED_SHORT) {
// Both buffers are ushort.
const ushort *data = other->indexesShort.constData() + start;
int count = other->indexesShort.count() - start;
indexesShort.reserve(indexesShort.count() + count);
indexCount += count;
while (count-- > 0)
indexesShort.append(ushort(*data++ + offset));
} else if (elementType == GL_UNSIGNED_SHORT) {
// Only first buffer is ushort: convert it to int first.
const ushort *indexes = indexesShort.constData();
int count = indexesShort.count();
indexesInt.reserve(count + other->indexesInt.count());
while (count-- > 0)
indexesInt.append(*indexes++);
indexesShort = QArray<ushort>();
elementType = GL_UNSIGNED_INT;
const uint *data = other->indexesInt.constData() + start;
count = other->indexesInt.count() - start;
indexCount += count;
while (count-- > 0)
indexesInt.append(*data++ + offset);
} else if (other->elementType == GL_UNSIGNED_SHORT) {
// Only second buffer is ushort.
const ushort *data = other->indexesShort.constData() + start;
int count = other->indexesShort.count() - start;
indexesInt.reserve(indexesInt.count() + count);
indexCount += count;
while (count-- > 0)
indexesInt.append(*data++ + offset);
} else {
// Neither buffer is ushort.
const uint *data = other->indexesInt.constData() + start;
int count = other->indexesInt.count() - start;
indexesInt.reserve(indexesInt.count() + count);
indexCount += count;
while (count-- > 0)
indexesInt.append(*data++ + offset);
}
}
static QArray<ushort> qt_qarray_uint_to_ushort(const QArray<uint> &array)
{
QArray<ushort> result;
const uint *values = array.constData();
int size = array.size();
bool largeValue = false;
result.reserve(size);
while (size-- > 0) {
uint value = *values++;
if (ushort(value) != value)
largeValue = true;
result.append(ushort(value));
}
if (largeValue)
qWarning("QGLIndexBuffer::setIndexes: large 32-bit value provided to a 16-bit only buffer");
return result;
}
