OpenGL: Reinstate support for OpenGL geometry shaders

Unlike QGLShader, this requires the OpenGL 3.2 core implementation
of geometry shaders to keep the API simple.

Change-Id: Icb07f430c4c5b5d950bcf6f7119becec4cfaad8a
Reviewed-by: James Turner <james.turner@kdab.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/gui/opengl/qopenglshaderprogram.h b/src/gui/opengl/qopenglshaderprogram.h
index f371326239..00b67f9434 100644
--- a/src/gui/opengl/qopenglshaderprogram.h
+++ b/src/gui/opengl/qopenglshaderprogram.h
@@ -64,7 +64,8 @@ public:
     enum ShaderTypeBit
     {
         Vertex          = 0x0001,
-        Fragment        = 0x0002
+        Fragment        = 0x0002,
+        Geometry        = 0x0004
     };
     Q_DECLARE_FLAGS(ShaderType, ShaderTypeBit)
 
@@ -126,6 +127,8 @@ public:
 
     GLuint programId() const;
 
+    int maxGeometryOutputVertices() const;
+
     void bindAttributeLocation(const char *name, int location);
     void bindAttributeLocation(const QByteArray& name, int location);
     void bindAttributeLocation(const QString& name, int location);