Method UpdateDynamicTextures

libs/drape/texture_manager.cpp:190–225

}

bool TextureManager::UpdateDynamicTextures(ref_ptr<dp::GraphicsContext> context)
{
  if (m_nothingToUpload.test_and_set())
  {
    auto const apiVersion = context->GetApiVersion();
    if (apiVersion == dp::ApiVersion::OpenGLES3)
    {
      // For some reasons OpenGL can not update textures immediately.
      // Here we use some timeout to prevent rendering frozening.
      double constexpr kUploadTimeoutInSeconds = 2.0;
      return m_uploadTimer.ElapsedSeconds() < kUploadTimeoutInSeconds;
    }

    if (apiVersion == dp::ApiVersion::Metal || apiVersion == dp::ApiVersion::Vulkan)
      return false;

    CHECK(false, ("Unsupported API version."));
  }

  CHECK(m_isInitialized, ());

  m_uploadTimer.Reset();

  CHECK(m_colorTexture != nullptr, ());
  m_colorTexture->UpdateState(context);

  CHECK(m_stipplePenTexture != nullptr, ());
  m_stipplePenTexture->UpdateState(context);

  UpdateGlyphTextures(context);

  CHECK(m_textureAllocator != nullptr, ());
  m_textureAllocator->Flush();

  return true;
}

void TextureManager::UpdateGlyphTextures(ref_ptr<dp::GraphicsContext> context)
{