compile on Linux

panda/src/doc/eggSyntax.txt

@@ -227,7 +227,45 @@ appear before they are referenced.
   This defines a set of material attributes that may later be
   referenced with <MRef> { name }.
 
-  At present, no material attributes have been implemented.
+  The following attributes may appear within the material block:
+
+  <Scalar> diffr { number }
+  <Scalar> diffg { number }
+  <Scalar> diffb { number }
+  <Scalar> diffa { number }
+
+  <Scalar> ambr { number }
+  <Scalar> ambg { number }
+  <Scalar> ambb { number }
+  <Scalar> amba { number }
+
+  <Scalar> emitr { number }
+  <Scalar> emitg { number }
+  <Scalar> emitb { number }
+  <Scalar> emita { number }
+
+  <Scalar> specr { number }
+  <Scalar> specg { number }
+  <Scalar> specb { number }
+  <Scalar> speca { number }
+
+  <Scalar> shininess { number }
+  <Scalar> local { flag }
+
+  These properties collectively define a "material" that controls the
+  lighting effects that are applied to a surface; a material is only
+  in effect in the presence of lighting.
+
+  The four color groups, diff*, amb*, emit*, and spec* specify the
+  diffuse, ambient, emission, and specular components of the lighting
+  equation, respectively.  Any of them may be omitted; the omitted
+  component(s) take their color from the native color of the
+  primitive, otherwise the primitive color is replaced with the
+  material color.
+
+  The shininess property controls the size of the specular highlight,
+  and the value ranges from 0 to 128.  A larger value creates a
+  smaller highlight (creating the appearance of a shinier surface).
 
 
 <VertexPool> name { vertices }

panda/src/glstuff/glGraphicsStateGuardian_src.cxx

@@ -2783,14 +2783,15 @@ has_extension(const string &extension) const {
 //               least the indicated value, false otherwise.
 ////////////////////////////////////////////////////////////////////
 bool CLP(GraphicsStateGuardian)::
-is_at_least_version(int major, int minor, int release) const {
-  if (_gl_version_major < major) {
+is_at_least_version(int major_version, int minor_version, 
+                    int release_version) const {
+  if (_gl_version_major < major_version) {
     return false;
   }
-  if (_gl_version_minor < minor) {
+  if (_gl_version_minor < minor_version) {
     return false;
   }
-  if (_gl_version_release < release) {
+  if (_gl_version_release < release_version) {
     return false;
   }
   return true;

panda/src/glstuff/glGraphicsStateGuardian_src.h

@@ -138,7 +138,7 @@ protected:
   virtual void get_extra_extensions();
   void report_extensions() const;
   bool has_extension(const string &extension) const;
-  bool is_at_least_version(int major, int minor, int release = 0) const;
+  bool is_at_least_version(int major_version, int minor_version, int release_version = 0) const;
 
   virtual bool slot_new_light(int light_id);
   virtual void enable_lighting(bool enable);

panda/src/glstuff/glext.h

@@ -1,5 +1,10 @@
-#ifndef __glext_h_
-#define __glext_h_
+/* Additions by drose to re-include this glext.h even if an older
+   version has previously been included. */
+#if defined(GL_GLEXT_VERSION) && GL_GLEXT_VERSION < 21
+  #undef GL_GLEXT_VERSION
+#endif
+#ifndef GL_GLEXT_VERSION
+
 
 #ifdef __cplusplus
 extern "C" {

panda/src/glxdisplay/glxGraphicsWindow.cxx

@@ -68,6 +68,34 @@ glxGraphicsWindow::
 ~glxGraphicsWindow() {
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: glxGraphicsWindow::make_context
+//       Access: Public, Virtual
+//  Description: If _needs_context is true, this will be called
+//               in the draw thread prior to rendering into the
+//               window.  It should attempt to create a graphics
+//               context, and return true if successful, false
+//               otherwise.  If it returns false the window will be
+//               considered failed.
+////////////////////////////////////////////////////////////////////
+bool glxGraphicsWindow::
+make_context() {
+  PStatTimer timer(_make_current_pcollector);
+
+  glxGraphicsStateGuardian *glxgsg;
+  DCAST_INTO_R(glxgsg, _gsg, false);
+  glXMakeCurrent(_display, _xwindow, glxgsg->_context);
+  _needs_context = false;
+
+  // Now that we have made the context current to a window, we can
+  // reset the GSG state if this is the first time it has been used.
+  // (We can't just call reset() when we construct the GSG, because
+  // reset() requires having a current context.)
+  glxgsg->reset_if_new();
+
+  return true;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: glxGraphicsWindow::make_current
 //       Access: Public, Virtual
@@ -82,12 +110,6 @@ make_current() {
   glxGraphicsStateGuardian *glxgsg;
   DCAST_INTO_V(glxgsg, _gsg);
   glXMakeCurrent(_display, _xwindow, glxgsg->_context);
-
-  // Now that we have made the context current to a window, we can
-  // reset the GSG state if this is the first time it has been used.
-  // (We can't just call reset() when we construct the GSG, because
-  // reset() requires having a current context.)
-  glxgsg->reset_if_new();
 }
 
 ////////////////////////////////////////////////////////////////////

panda/src/glxdisplay/glxGraphicsWindow.h

@@ -36,6 +36,7 @@ public:
                     const string &name);
   virtual ~glxGraphicsWindow();
 
+  virtual bool make_context();
   virtual void make_current();
   virtual void release_gsg();