define mesadisplay

panda/metalibs/pandagl/Sources.pp

@@ -12,7 +12,7 @@
   // We don't have any components if we're linking the GL library
   // directly into Panda.
   #define COMPONENT_LIBS \
-      glgsg glxdisplay  \
+      glgsg glxdisplay mesadisplay  \
       wgldisplay
 #endif
 

panda/src/mesadisplay/Sources.pp

@@ -0,0 +1,22 @@
+#define BUILD_DIRECTORY $[HAVE_MESA]
+
+#define OTHER_LIBS interrogatedb:c dconfig:c dtoolconfig:m \
+                   dtoolutil:c dtoolbase:c dtool:m
+#define USE_PACKAGES gl mesa
+
+#begin lib_target
+  #define TARGET mesadisplay
+  #define LOCAL_LIBS \
+    glgsg
+
+  #define SOURCES \
+    config_mesadisplay.cxx config_mesadisplay.h \
+    mesaGraphicsBuffer.I mesaGraphicsBuffer.cxx mesaGraphicsBuffer.h \
+    mesaGraphicsPipe.I mesaGraphicsPipe.cxx mesaGraphicsPipe.h \
+    mesaGraphicsStateGuardian.h mesaGraphicsStateGuardian.cxx \
+    mesaGraphicsStateGuardian.I
+
+  #define IGATESCAN mesaGraphicsPipe.h
+
+#end lib_target
+

panda/src/mesadisplay/config_mesadisplay.cxx

@@ -0,0 +1,57 @@
+// Filename: config_mesadisplay.cxx
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#include "config_mesadisplay.h"
+#include "mesaGraphicsBuffer.h"
+#include "mesaGraphicsPipe.h"
+#include "mesaGraphicsStateGuardian.h"
+#include "graphicsPipeSelection.h"
+#include "dconfig.h"
+
+Configure(config_mesadisplay);
+NotifyCategoryDef(mesadisplay, "display");
+
+ConfigureFn(config_mesadisplay) {
+  init_libmesadisplay();
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: init_libmesadisplay
+//  Description: Initializes the library.  This must be called at
+//               least once before any of the functions or classes in
+//               this library can be used.  Normally it will be
+//               called by the static initializers and need not be
+//               called explicitly, but special cases exist.
+////////////////////////////////////////////////////////////////////
+void
+init_libmesadisplay() {
+  static bool initialized = false;
+  if (initialized) {
+    return;
+  }
+  initialized = true;
+
+  MesaGraphicsBuffer::init_type();
+  MesaGraphicsPipe::init_type();
+  MesaGraphicsStateGuardian::init_type();
+
+  cerr << "Adding MesaGraphicsPipe\n";
+  GraphicsPipeSelection *selection = GraphicsPipeSelection::get_global_ptr();
+  selection->add_pipe_type(MesaGraphicsPipe::get_class_type(),
+                           MesaGraphicsPipe::pipe_constructor);
+}

panda/src/mesadisplay/config_mesadisplay.h

@@ -0,0 +1,29 @@
+// Filename: config_mesadisplay.h
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#ifndef CONFIG_MESADISPLAY_H
+#define CONFIG_MESADISPLAY_H
+
+#include "pandabase.h"
+#include "notifyCategoryProxy.h"
+
+NotifyCategoryDecl(mesadisplay, EXPCL_PANDAGL, EXPTP_PANDAGL);
+
+extern EXPCL_PANDAGL void init_libmesadisplay();
+
+#endif

panda/src/mesadisplay/mesaGraphicsBuffer.I

@@ -0,0 +1,18 @@
+// Filename: mesaGraphicsBuffer.I
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+

panda/src/mesadisplay/mesaGraphicsBuffer.cxx

@@ -0,0 +1,115 @@
+// Filename: mesaGraphicsBuffer.cxx
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#include "mesaGraphicsBuffer.h"
+#include "config_mesadisplay.h"
+#include "mesaGraphicsPipe.h"
+#include "mesaGraphicsStateGuardian.h"
+
+TypeHandle MesaGraphicsBuffer::_type_handle;
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsBuffer::Constructor
+//       Access: Public
+//  Description:
+////////////////////////////////////////////////////////////////////
+MesaGraphicsBuffer::
+MesaGraphicsBuffer(GraphicsPipe *pipe, GraphicsStateGuardian *gsg,
+                   int x_size, int y_size, bool want_texture) :
+  GraphicsBuffer(pipe, gsg, x_size, y_size, want_texture) 
+{
+  _type = GL_UNSIGNED_BYTE;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsBuffer::Destructor
+//       Access: Public, Virtual
+//  Description:
+////////////////////////////////////////////////////////////////////
+MesaGraphicsBuffer::
+~MesaGraphicsBuffer() {
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsBuffer::make_current
+//       Access: Public, Virtual
+//  Description: This function will be called within the draw thread
+//               during begin_frame() to ensure the graphics context
+//               is ready for drawing.
+////////////////////////////////////////////////////////////////////
+void MesaGraphicsBuffer::
+make_current() {
+  MesaGraphicsStateGuardian *mesagsg;
+  DCAST_INTO_V(mesagsg, _gsg);
+  OSMesaMakeCurrent(mesagsg->_context, _image.p(), _type,
+                    _x_size, _y_size);
+
+  mesagsg->reset_if_new();
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsBuffer::begin_flip
+//       Access: Public, Virtual
+//  Description: This function will be called within the draw thread
+//               after end_frame() has been called on all windows, to
+//               initiate the exchange of the front and back buffers.
+//
+//               This should instruct the window to prepare for the
+//               flip at the next video sync, but it should not wait.
+//
+//               We have the two separate functions, begin_flip() and
+//               end_flip(), to make it easier to flip all of the
+//               windows at the same time.
+////////////////////////////////////////////////////////////////////
+void MesaGraphicsBuffer::
+begin_flip() {
+  if (has_texture()) {
+    // Use glCopyTexImage2D to copy the framebuffer to the texture.
+    // This appears to be the only way to "render to a texture" in
+    // OpenGL; there's no interface to make the offscreen buffer
+    // itself be a texture.
+    DisplayRegion dr(_x_size, _y_size);
+    get_texture()->copy(_gsg, &dr, _gsg->get_render_buffer(RenderBuffer::T_back));
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsBuffer::close_buffer
+//       Access: Protected, Virtual
+//  Description: Closes the buffer right now.  Called from the window
+//               thread.
+////////////////////////////////////////////////////////////////////
+void MesaGraphicsBuffer::
+close_buffer() {
+  _image.clear();
+  _is_valid = false;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsBuffer::open_buffer
+//       Access: Protected, Virtual
+//  Description: Opens the buffer right now.  Called from the window
+//               thread.  Returns true if the buffer is successfully
+//               opened, or false if there was a problem.
+////////////////////////////////////////////////////////////////////
+bool MesaGraphicsBuffer::
+open_buffer() {
+  _image = PTA_uchar::empty_array(_x_size * _y_size * 4);
+  _is_valid = true;
+  return true;
+}

panda/src/mesadisplay/mesaGraphicsBuffer.h

@@ -0,0 +1,72 @@
+// Filename: mesaGraphicsBuffer.h
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#ifndef MESAGRAPHICSBUFFER_H
+#define MESAGRAPHICSBUFFER_H
+
+#include "pandabase.h"
+
+#include "mesaGraphicsPipe.h"
+#include "graphicsBuffer.h"
+
+////////////////////////////////////////////////////////////////////
+//       Class : MesaGraphicsBuffer
+// Description : An offscreen buffer using direct calls to Mesa.  This
+//               is the only kind of graphics output supported by
+//               osmesa.h.
+////////////////////////////////////////////////////////////////////
+class MesaGraphicsBuffer : public GraphicsBuffer {
+public:
+  MesaGraphicsBuffer(GraphicsPipe *pipe, GraphicsStateGuardian *gsg,
+                    int x_size, int y_size, bool want_texture);
+
+  virtual ~MesaGraphicsBuffer();
+
+  virtual void make_current();
+
+  virtual void begin_flip();
+
+protected:
+  virtual void close_buffer();
+  virtual bool open_buffer();
+
+private:
+  GLenum _type;
+  PTA_uchar _image;
+
+public:
+  static TypeHandle get_class_type() {
+    return _type_handle;
+  }
+  static void init_type() {
+    GraphicsBuffer::init_type();
+    register_type(_type_handle, "MesaGraphicsBuffer",
+                  GraphicsBuffer::get_class_type());
+  }
+  virtual TypeHandle get_type() const {
+    return get_class_type();
+  }
+  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
+
+private:
+  static TypeHandle _type_handle;
+};
+
+#include "mesaGraphicsBuffer.I"
+
+#endif

panda/src/mesadisplay/mesaGraphicsPipe.I

@@ -0,0 +1,18 @@
+// Filename: mesaGraphicsPipe.I
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+

panda/src/mesadisplay/mesaGraphicsPipe.cxx

@@ -0,0 +1,95 @@
+// Filename: mesaGraphicsPipe.cxx
+// Created by:  mike (09Jan97)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#include "mesaGraphicsPipe.h"
+#include "mesaGraphicsBuffer.h"
+#include "mesaGraphicsStateGuardian.h"
+#include "config_mesadisplay.h"
+#include "frameBufferProperties.h"
+#include "mutexHolder.h"
+
+TypeHandle MesaGraphicsPipe::_type_handle;
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsPipe::Constructor
+//       Access: Public
+//  Description: 
+////////////////////////////////////////////////////////////////////
+MesaGraphicsPipe::
+MesaGraphicsPipe() {
+  _supported_types = OT_buffer;
+  _is_valid = true;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsPipe::Destructor
+//       Access: Public, Virtual
+//  Description: 
+////////////////////////////////////////////////////////////////////
+MesaGraphicsPipe::
+~MesaGraphicsPipe() {
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsPipe::get_interface_name
+//       Access: Published, Virtual
+//  Description: Returns the name of the rendering interface
+//               associated with this GraphicsPipe.  This is used to
+//               present to the user to allow him/her to choose
+//               between several possible GraphicsPipes available on a
+//               particular platform, so the name should be meaningful
+//               and unique for a given platform.
+////////////////////////////////////////////////////////////////////
+string MesaGraphicsPipe::
+get_interface_name() const {
+  return "Offscreen Mesa";
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsPipe::pipe_constructor
+//       Access: Public, Static
+//  Description: This function is passed to the GraphicsPipeSelection
+//               object to allow the user to make a default
+//               MesaGraphicsPipe.
+////////////////////////////////////////////////////////////////////
+PT(GraphicsPipe) MesaGraphicsPipe::
+pipe_constructor() {
+  return new MesaGraphicsPipe;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsPipe::make_gsg
+//       Access: Protected, Virtual
+//  Description: Creates a new GSG to use the pipe (but no windows
+//               have been created yet for the GSG).  This method will
+//               be called in the draw thread for the GSG.
+////////////////////////////////////////////////////////////////////
+PT(GraphicsStateGuardian) MesaGraphicsPipe::
+make_gsg(const FrameBufferProperties &properties) {
+  return new MesaGraphicsStateGuardian(properties);
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsPipe::make_buffer
+//       Access: Protected, Virtual
+//  Description: Creates a new offscreen buffer on the pipe, if possible.
+////////////////////////////////////////////////////////////////////
+PT(GraphicsBuffer) MesaGraphicsPipe::
+make_buffer(GraphicsStateGuardian *gsg, int x_size, int y_size, bool want_texture) {
+  return new MesaGraphicsBuffer(this, gsg, x_size, y_size, want_texture);
+}

panda/src/mesadisplay/mesaGraphicsPipe.h

@@ -0,0 +1,76 @@
+// Filename: mesaGraphicsPipe.h
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#ifndef MESAGRAPHICSPIPE_H
+#define MESAGRAPHICSPIPE_H
+
+#include "pandabase.h"
+#include "graphicsWindow.h"
+#include "graphicsPipe.h"
+
+#include <GL/osmesa.h>
+
+class FrameBufferProperties;
+
+////////////////////////////////////////////////////////////////////
+//       Class : MesaGraphicsPipe
+// Description : This graphics pipe represents the interface for
+//               rendering with direct calls to the Mesa open-source
+//               software-only implementation of OpenGL.
+//
+//               Raw Mesa supports only offscreen buffers, but it's
+//               possible to create and render into these offscreen
+//               buffers without having any X server or other
+//               operating system infrastructure in place.
+////////////////////////////////////////////////////////////////////
+class MesaGraphicsPipe : public GraphicsPipe {
+public:
+  MesaGraphicsPipe();
+  virtual ~MesaGraphicsPipe();
+
+  virtual string get_interface_name() const;
+  static PT(GraphicsPipe) pipe_constructor();
+
+protected:
+  virtual PT(GraphicsStateGuardian) make_gsg(const FrameBufferProperties &properties);
+  virtual PT(GraphicsBuffer) make_buffer(GraphicsStateGuardian *gsg, 
+                                         int x_size, int y_size, bool want_texture);
+
+private:
+
+public:
+  static TypeHandle get_class_type() {
+    return _type_handle;
+  }
+  static void init_type() {
+    GraphicsPipe::init_type();
+    register_type(_type_handle, "MesaGraphicsPipe",
+                  GraphicsPipe::get_class_type());
+  }
+  virtual TypeHandle get_type() const {
+    return get_class_type();
+  }
+  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
+
+private:
+  static TypeHandle _type_handle;
+};
+
+#include "mesaGraphicsPipe.I"
+
+#endif

panda/src/mesadisplay/mesaGraphicsStateGuardian.I

@@ -0,0 +1,17 @@
+// Filename: glxGraphicsStateGuardian.I
+// Created by:  drose (27Jan03)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////

panda/src/mesadisplay/mesaGraphicsStateGuardian.cxx

@@ -0,0 +1,46 @@
+// Filename: mesaGraphicsStateGuardian.cxx
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#include "mesaGraphicsStateGuardian.h"
+
+TypeHandle MesaGraphicsStateGuardian::_type_handle;
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsStateGuardian::Constructor
+//       Access: Public
+//  Description:
+////////////////////////////////////////////////////////////////////
+MesaGraphicsStateGuardian::
+MesaGraphicsStateGuardian(const FrameBufferProperties &properties) : 
+  GLGraphicsStateGuardian(properties)
+{
+  _context = OSMesaCreateContext(OSMESA_RGBA, NULL);
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: MesaGraphicsStateGuardian::Destructor
+//       Access: Public
+//  Description:
+////////////////////////////////////////////////////////////////////
+MesaGraphicsStateGuardian::
+~MesaGraphicsStateGuardian() {
+  if (_context != (OSMesaContext)NULL) {
+    OSMesaDestroyContext(_context);
+    _context = (OSMesaContext)NULL;
+  }
+}

panda/src/mesadisplay/mesaGraphicsStateGuardian.h

@@ -0,0 +1,59 @@
+// Filename: mesaGraphicsStateGuardian.h
+// Created by:  drose (09Feb04)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
+//
+// All use of this software is subject to the terms of the Panda 3d
+// Software license.  You should have received a copy of this license
+// along with this source code; you will also find a current copy of
+// the license at http://www.panda3d.org/license.txt .
+//
+// To contact the maintainers of this program write to
+// panda3d@yahoogroups.com .
+//
+////////////////////////////////////////////////////////////////////
+
+#ifndef MESAGRAPHICSSTATEGUARDIAN_H
+#define MESAGRAPHICSSTATEGUARDIAN_H
+
+#include "pandabase.h"
+
+#include "glGraphicsStateGuardian.h"
+#include "mesaGraphicsPipe.h"
+
+////////////////////////////////////////////////////////////////////
+//       Class : MesaGraphicsStateGuardian
+// Description : A tiny specialization on GLGraphicsStateGuardian to
+//               add some Mesa-specific information.
+////////////////////////////////////////////////////////////////////
+class MesaGraphicsStateGuardian : public GLGraphicsStateGuardian {
+public:
+  MesaGraphicsStateGuardian(const FrameBufferProperties &properties);
+  virtual ~MesaGraphicsStateGuardian();
+
+  OSMesaContext _context;
+
+public:
+  static TypeHandle get_class_type() {
+    return _type_handle;
+  }
+  static void init_type() {
+    GLGraphicsStateGuardian::init_type();
+    register_type(_type_handle, "MesaGraphicsStateGuardian",
+                  GLGraphicsStateGuardian::get_class_type());
+  }
+  virtual TypeHandle get_type() const {
+    return get_class_type();
+  }
+  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
+
+private:
+  static TypeHandle _type_handle;
+};
+
+#include "mesaGraphicsStateGuardian.I"
+
+#endif