Build glyphs for distance field texts earlier in OpenGL RT

Build and cache glyphs for distance field texts at the first frame
regardless of text initial state. Glyph building is a heavy operation that
causes a visible freeze in the animation when a text element becomes active
after initial inactivity. Additionally, build associated shaders at
presentation load time.

Task-id: QT3DS-3503
Change-Id: If1e0c81f26d731f1bbd1cd7bcd745400c8ff6920
Reviewed-by: Jere Tuliniemi <jere.tuliniemi@qt.io>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
 

1 files changed, 1 insertions, 0 deletions

diff --git a/src/Runtime/Source/runtimerender/rendererimpl/Qt3DSRenderableObjects.h b/src/Runtime/Source/runtimerender/rendererimpl/Qt3DSRenderableObjects.h
index 39e73e8e..a369f7a1 100644
--- a/src/Runtime/Source/runtimerender/rendererimpl/Qt3DSRenderableObjects.h
+++ b/src/Runtime/Source/runtimerender/rendererimpl/Qt3DSRenderableObjects.h
@@ -413,6 +413,7 @@ namespace render {
             m_RenderableFlags.SetCustom(false);
             m_RenderableFlags.SetText(false);
             m_RenderableFlags.setDistanceField(true);
+            m_distanceFieldText.checkAndBuildGlyphs(text);
         }
 
         void Render(const QT3DSVec2 &inCameraVec);