Method CopyGpuToCpu

GTE/Graphics/GL46/GL46Buffer.cpp:110–131

}

bool GL46Buffer::CopyGpuToCpu()
{
    if (!PreparedForCopy(GL_READ_ONLY))
    {
        return false;
    }

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