Method updateWithMipmaps

core/renderer/Texture2D.cpp:299–437

}

bool Texture2D::updateWithMipmaps(MipmapInfo* mipmaps,
                                  int mipmapsNum,
                                  backend::PixelFormat pixelFormat,
                                  backend::PixelFormat renderFormat,
                                  int pixelsWide,
                                  int pixelsHigh,
                                  bool preMultipliedAlpha,
                                  int index)
{
    // the pixelFormat must be a certain value
    AXASSERT(pixelFormat != PixelFormat::NONE, "the \"pixelFormat\" param must be a certain value!");
    AXASSERT(pixelsWide > 0 && pixelsHigh > 0, "Invalid size");

    if (mipmapsNum <= 0)
    {
        AXLOGW("WARNING: mipmap number is less than 1");
        return false;
    }

    auto& pfd = backend::PixelFormatUtils::getFormatDescriptor(pixelFormat);
    if (!pfd.bpp)
    {
        AXLOGW("WARNING: unsupported pixelformat: {:x}", (uint32_t)pixelFormat);
#ifdef AX_USE_METAL
        AXASSERT(false, "pixeformat not found in _pixelFormatInfoTables, register required!");
#endif
        return false;
    }

    bool compressed = backend::PixelFormatUtils::isCompressed(pixelFormat);

    if (compressed && !Configuration::getInstance()->supportsPVRTC() && !Configuration::getInstance()->supportsETC1() &&
        !Configuration::getInstance()->supportsETC2() && !Configuration::getInstance()->supportsS3TC() &&
        !Configuration::getInstance()->supportsASTC() && !Configuration::getInstance()->supportsATITC())
    {
        AXLOGW("WARNING: PVRTC/ETC images are not supported");
        return false;
    }

#if AX_ENABLE_CACHE_TEXTURE_DATA
    VolatileTextureMgr::getOrAddVolatileTexture(this);
#endif

    backend::TextureDescriptor textureDescriptor;
    textureDescriptor.width  = pixelsWide;
    textureDescriptor.height = pixelsHigh;

    textureDescriptor.samplerDescriptor.magFilter =
        (_flags & TextureFlag::ANTIALIAS_ENABLED) ? backend::SamplerFilter::LINEAR : backend::SamplerFilter::NEAREST;
    if (mipmapsNum == 1)
    {
        textureDescriptor.samplerDescriptor.minFilter = (_flags & TextureFlag::ANTIALIAS_ENABLED)
                                                            ? backend::SamplerFilter::LINEAR
                                                            : backend::SamplerFilter::NEAREST;
    }
    else
    {
        textureDescriptor.samplerDescriptor.minFilter = (_flags & TextureFlag::ANTIALIAS_ENABLED)