void GraphicsLayer::updateArray(VertexArray& array, const QVector<Vertex>& data)
{
int length = data.count();
if (array.length() != length) {
removeArray(array);
array.start = -1;
for (int i = 0; i < m_free_regions.count(); ++i) {
VertexArray& free_region = m_free_regions[i];
if (free_region.length() == length) {
array.start = free_region.start;
array.end = array.start + length;
m_free_regions.removeAt(i);
break;
} else if (free_region.length() > length) {
array.start = free_region.start;
array.end = array.start + length;
free_region.start += length;
break;
}
}
}
if (array.start != -1) {
qCopy(data.begin(), data.end(), m_data.begin() + array.start);
if (!m_changed) {
m_changed_regions.append(array);
}
} else {
array.start = m_data.count();
array.end = array.start + length;
m_data += data;
m_changed = true;
m_changed_regions.clear();
}
}
void GraphicsLayer13::draw(const VertexArray& array, GLenum mode)
{
glClientActiveTexture(GL_TEXTURE1);
glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), &at(array.start).s2);
glClientActiveTexture(GL_TEXTURE0);
glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), &at(array.start).s);
glVertexPointer(3, GL_FLOAT, sizeof(Vertex), &at(array.start).x);
glDrawArrays(mode, 0, array.length());
}
void GraphicsLayer15::draw(const VertexArray& array, GLenum mode)
{
glDrawArrays(mode, array.start, array.length());
}
void GraphicsLayer11::draw(const VertexArray& array, GLenum mode)
{
glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), &at(array.start).s);
glVertexPointer(3, GL_FLOAT, sizeof(Vertex), &at(array.start).x);
glDrawArrays(mode, 0, array.length());
}
