RenderShaderData: update UBO uniform by uniform

Instead of updating the whole UBO at once, we keep track of the
QShaderData/member in the uniform block that have changed and upload only the
buffer from the uniform offset to uniform offset + size.

Change-Id: Ib69302183b17dbe15985b405406c8fed88c022bb
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/render/backend/rendershaderdata_p.h b/src/render/backend/rendershaderdata_p.h
index 9f14a24cd..7210056dc 100644
--- a/src/render/backend/rendershaderdata_p.h
+++ b/src/render/backend/rendershaderdata_p.h
@@ -79,6 +79,7 @@ private:
     ShaderUniformBlock m_block;
     QByteArray m_data;
     UniformBuffer m_ubo;
+    QStringList m_updatedProperties;
     bool m_initialized;
     bool m_needsBufferUpdate;
 };