From bed33fb7637fd3ca0643f44833e6909caa3f0753 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Wed, 14 May 2008 00:57:36 +0000
Subject: [PATCH] GSG::is_hardware()

---
 panda/src/display/graphicsStateGuardian.I            | 12 ++++++++++++
 panda/src/display/graphicsStateGuardian.cxx          |  1 +
 panda/src/display/graphicsStateGuardian.h            |  2 ++
 panda/src/dxgsg8/dxGraphicsStateGuardian8.cxx        |  4 ++++
 panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx        |  4 ++++
 panda/src/glstuff/glGraphicsStateGuardian_src.cxx    |  4 ++++
 .../src/mesadisplay/osMesaGraphicsStateGuardian.cxx  |  3 +++
 7 files changed, 30 insertions(+)

diff --git a/panda/src/display/graphicsStateGuardian.I b/panda/src/display/graphicsStateGuardian.I
index 1df6adbc55..d9eaa17461 100644
--- a/panda/src/display/graphicsStateGuardian.I
+++ b/panda/src/display/graphicsStateGuardian.I
@@ -141,6 +141,18 @@ get_threading_model() const {
   return _threading_model;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: GraphicsStateGuardian::is_hardware
+//       Access: Published
+//  Description: Returns true if this GSG appears to be
+//               hardware-accelerated, or false if it is known to be
+//               software only.
+////////////////////////////////////////////////////////////////////
+INLINE bool GraphicsStateGuardian::
+is_hardware() const {
+  return _is_hardware;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: GraphicsStateGuardian::prefers_triangle_strips
 //       Access: Published, Virtual
diff --git a/panda/src/display/graphicsStateGuardian.cxx b/panda/src/display/graphicsStateGuardian.cxx
index feaa6d4b9a..8ec0213e4b 100644
--- a/panda/src/display/graphicsStateGuardian.cxx
+++ b/panda/src/display/graphicsStateGuardian.cxx
@@ -136,6 +136,7 @@ GraphicsStateGuardian(CoordinateSystem internal_coordinate_system,
   _prepared_objects = new PreparedGraphicsObjects;
   _stereo_buffer_mask = ~0;
 
+  _is_hardware = false;
   _prefers_triangle_strips = false;
   _max_vertices_per_array = INT_MAX;
   _max_vertices_per_primitive = INT_MAX;
diff --git a/panda/src/display/graphicsStateGuardian.h b/panda/src/display/graphicsStateGuardian.h
index ef29c1c1c6..baa5ea7594 100644
--- a/panda/src/display/graphicsStateGuardian.h
+++ b/panda/src/display/graphicsStateGuardian.h
@@ -98,6 +98,7 @@ PUBLISHED:
   INLINE GraphicsEngine *get_engine() const;
   INLINE const GraphicsThreadingModel &get_threading_model() const;
 
+  INLINE bool is_hardware() const;
   virtual INLINE bool prefers_triangle_strips() const;
   virtual INLINE int get_max_vertices_per_array() const;
   virtual INLINE int get_max_vertices_per_primitive() const;
@@ -356,6 +357,7 @@ protected:
 
   PT(PreparedGraphicsObjects) _prepared_objects;
 
+  bool _is_hardware;
   bool _prefers_triangle_strips;
   int _max_vertices_per_array;
   int _max_vertices_per_primitive;
diff --git a/panda/src/dxgsg8/dxGraphicsStateGuardian8.cxx b/panda/src/dxgsg8/dxGraphicsStateGuardian8.cxx
index fd2e74b0b3..db0ced7941 100644
--- a/panda/src/dxgsg8/dxGraphicsStateGuardian8.cxx
+++ b/panda/src/dxgsg8/dxGraphicsStateGuardian8.cxx
@@ -85,6 +85,10 @@ DXGraphicsStateGuardian8::
 DXGraphicsStateGuardian8(GraphicsPipe *pipe) :
   GraphicsStateGuardian(CS_yup_left, pipe)
 {
+  // Assume that we will get a hardware-accelerated context, unless
+  // the window tells us otherwise.
+  _is_hardware = true;
+
   _screen = NULL;
   _d3d_device = NULL;
 
diff --git a/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx b/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
index bd30df94f1..5e97d93105 100755
--- a/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
+++ b/panda/src/dxgsg9/dxGraphicsStateGuardian9.cxx
@@ -103,6 +103,10 @@ DXGraphicsStateGuardian9(GraphicsPipe *pipe) :
       << "DXGraphicsStateGuardian9 " << this << " constructing\n";
   }
 
+  // Assume that we will get a hardware-accelerated context, unless
+  // the window tells us otherwise.
+  _is_hardware = true;
+
   _screen = NULL;
   _d3d_device = NULL;
 
diff --git a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
index ace32c4bbf..90316a84d1 100644
--- a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
+++ b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
@@ -254,6 +254,10 @@ CLP(GraphicsStateGuardian)(GraphicsPipe *pipe) :
   // performance benefit it gives us.
   _prepared_objects->_support_released_buffer_cache = true;
 
+  // Assume that we will get a hardware-accelerated context, unless
+  // the window tells us otherwise.
+  _is_hardware = true;
+
 #ifdef DO_PSTATS
   if (CLP(finish)) {
     GLCAT.warning()
diff --git a/panda/src/mesadisplay/osMesaGraphicsStateGuardian.cxx b/panda/src/mesadisplay/osMesaGraphicsStateGuardian.cxx
index 19559e57d9..3a7066686c 100644
--- a/panda/src/mesadisplay/osMesaGraphicsStateGuardian.cxx
+++ b/panda/src/mesadisplay/osMesaGraphicsStateGuardian.cxx
@@ -37,6 +37,9 @@ OSMesaGraphicsStateGuardian(GraphicsPipe *pipe,
   }
 
   _context = OSMesaCreateContext(OSMESA_RGBA, share_context);
+
+  // OSMesa is never hardware-accelerated.
+  _is_hardware = false;
 }
 
 ////////////////////////////////////////////////////////////////////