Method Update

GTE/Graphics/GL46/GL46Buffer.cpp:66–85

}

bool GL46Buffer::Update()
{
    Buffer* buffer = GetBuffer();
    LogAssert(buffer->GetUsage() == Resource::Usage::DYNAMIC_UPDATE,
        "Buffer usage is not DYNAMIC_UPDATE.");

    GLuint numActiveBytes = buffer->GetNumActiveBytes();
    if (numActiveBytes > 0)
    {
        // Copy from CPU memory to GPU memory.
        GLintptr offsetInBytes =
            static_cast<GLintptr>(buffer->GetOffset()) *
            static_cast<GLintptr>(buffer->GetElementSize());
        char const* source = buffer->GetData() + offsetInBytes;
        glBindBuffer(mType, mGLHandle);
        glBufferSubData(mType, offsetInBytes, numActiveBytes, source);
        glBindBuffer(mType, 0);
    }
    return true;
}

bool GL46Buffer::CopyCpuToGpu()
{