Add support for point size and sprites

On desktop environments, GL_PROGRAM_POINT_SIZE and GL_POINT_SPRITE
need to be explicitly enabled to support variable point size and
texturing the points.

Change-Id: I27e17997b34ba877595a68cc74ffb63c2b1b2954
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/imports/qtcanvas3d/canvas3d.cpp b/src/imports/qtcanvas3d/canvas3d.cpp
index 439fa50..efcf8bd 100644
--- a/src/imports/qtcanvas3d/canvas3d.cpp
+++ b/src/imports/qtcanvas3d/canvas3d.cpp
@@ -418,6 +418,15 @@ QJSValue Canvas::getContext(const QString &type, const QVariantMap &options)
                   m_fboSize.width(),
                   m_fboSize.height());
 
+#if !defined(QT_OPENGL_ES_2)
+        if (!m_isOpenGLES2) {
+            // Make it possible to change point primitive size and use textures with them in
+            // the shaders. These are implicitly enabled in ES2.
+            glEnable(GL_PROGRAM_POINT_SIZE);
+            glEnable(GL_POINT_SPRITE);
+        }
+#endif
+
         // Verify that width and height are not initially too large, in case width and height
         // were set before getting GL_MAX_VIEWPORT_DIMS
         if (width() > m_maxSize.width()) {