Method resizeCapacity

core/renderer/TextureAtlas.cpp:341–420

TextureAtlas - Resize

// TextureAtlas - Resize
bool TextureAtlas::resizeCapacity(ssize_t newCapacity)
{
    AXASSERT(newCapacity >= 0, "capacity >= 0");
    if (newCapacity == _capacity)
    {
        return true;
    }
    auto oldCapacity = _capacity;

    // update capacity and totalQuads
    _totalQuads = MIN(_totalQuads, newCapacity);
    _capacity   = newCapacity;

    V3F_C4B_T2F_Quad* tmpQuads = nullptr;
    uint16_t* tmpIndices       = nullptr;

    // when calling initWithTexture(fileName, 0) on bada device, calloc(0, 1) will fail and return nullptr,
    // so here must judge whether _quads and _indices is nullptr.

    ssize_t _quads_size    = sizeof(_quads[0]);
    ssize_t new_quads_size = _capacity * _quads_size;
    if (_quads == nullptr)
    {
        tmpQuads = (V3F_C4B_T2F_Quad*)malloc(new_quads_size);
        if (tmpQuads != nullptr)
        {
            memset(tmpQuads, 0, new_quads_size);
        }
    }
    else
    {
        tmpQuads = (V3F_C4B_T2F_Quad*)realloc(_quads, new_quads_size);
        if (tmpQuads != nullptr && _capacity > oldCapacity)
        {
            memset(tmpQuads + oldCapacity, 0, (_capacity - oldCapacity) * _quads_size);
        }
        _quads = nullptr;
    }

    ssize_t _indices_size = sizeof(_indices[0]);
    ssize_t new_size      = _capacity * 6 * _indices_size;

    if (_indices == nullptr)
    {
        tmpIndices = (uint16_t*)malloc(new_size);
        if (tmpIndices != nullptr)
        {
            memset(tmpIndices, 0, new_size);
        }
    }
    else
    {
        tmpIndices = (uint16_t*)realloc(_indices, new_size);
        if (tmpIndices != nullptr && _capacity > oldCapacity)
        {
            memset(tmpIndices + oldCapacity, 0, (_capacity - oldCapacity) * 6 * _indices_size);
        }
        _indices = nullptr;