fix wglGraphicsBuffer

panda/src/wgldisplay/Sources.pp

@@ -17,7 +17,8 @@
     wglGraphicsBuffer.I wglGraphicsBuffer.h \
     wglGraphicsPipe.I wglGraphicsPipe.h \
     wglGraphicsStateGuardian.I wglGraphicsStateGuardian.h \
-    wglGraphicsWindow.I wglGraphicsWindow.h
+    wglGraphicsWindow.I wglGraphicsWindow.h \
+    wglExtensions.h
     
   #define INCLUDED_SOURCES \
     config_wgldisplay.cxx \

panda/src/wgldisplay/wglExtensions.h

@@ -0,0 +1,139 @@
+// Filename: wglExtensions.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 WGLEXTENSIONS_H
+#define WGLEXTENSIONS_H
+
+#include "pandabase.h"
+
+#include <windows.h>
+
+// This file defines some headers that are necessary to make use of
+// the various wgl extensions we might test for in this module.
+
+
+// The following headers are from the WGL_ARB_pbuffer extension for
+// offscreen rendering into Pbuffers.
+
+DECLARE_HANDLE(HPBUFFERARB);
+
+typedef HPBUFFERARB (*wglCreatePbufferARB_proc)(HDC hDC,
+                                                int iPixelFormat,
+                                                int iWidth,
+                                                int iHeight,
+                                                const int *piAttribList);
+
+typedef HDC (*wglGetPbufferDCARB_proc)(HPBUFFERARB hPbuffer);
+
+typedef int (*wglReleasePbufferDCARB_proc)(HPBUFFERARB hPbuffer,
+                                           HDC hDC);
+
+typedef BOOL (*wglDestroyPbufferARB_proc)(HPBUFFERARB hPbuffer);
+
+typedef BOOL (*wglQueryPbufferARB_proc)(HPBUFFERARB hPbuffer,
+                                        int iAttribute,
+                                        int *piValue);
+
+#define WGL_DRAW_TO_PBUFFER_ARB              0x202D
+#define WGL_MAX_PBUFFER_PIXELS_ARB           0x202E
+#define WGL_MAX_PBUFFER_WIDTH_ARB            0x202F
+#define WGL_MAX_PBUFFER_HEIGHT_ARB           0x2030
+#define WGL_PBUFFER_LARGEST_ARB              0x2033
+#define WGL_PBUFFER_WIDTH_ARB                0x2034
+#define WGL_PBUFFER_HEIGHT_ARB               0x2035
+#define WGL_PBUFFER_LOST_ARB                 0x2036
+
+
+// The following headers are from the WGL_ARB_pixel_format extension
+// for getting extended pixel format information.
+
+typedef BOOL (*wglGetPixelFormatAttribivARB_proc)(HDC hdc,
+                                                  int iPixelFormat,
+                                                  int iLayerPlane,
+                                                  UINT nAttributes,
+                                                  const int *piAttributes,
+                                                  int *piValues);
+
+typedef BOOL (*wglGetPixelFormatAttribfvARB_proc)(HDC hdc,
+                                                  int iPixelFormat,
+                                                  int iLayerPlane,
+                                                  UINT nAttributes,
+                                                  const int *piAttributes,
+                                                  FLOAT *pfValues);
+
+typedef BOOL (*wglChoosePixelFormatARB_proc)(HDC hdc,
+                                             const int *piAttribIList,
+                                             const FLOAT *pfAttribFList,
+                                             UINT nMaxFormats,
+                                             int *piFormats,
+                                             UINT *nNumFormats);
+
+#define WGL_NUMBER_PIXEL_FORMATS_ARB		0x2000
+#define WGL_DRAW_TO_WINDOW_ARB			0x2001
+#define WGL_DRAW_TO_BITMAP_ARB			0x2002
+#define WGL_ACCELERATION_ARB			0x2003
+#define WGL_NEED_PALETTE_ARB			0x2004
+#define WGL_NEED_SYSTEM_PALETTE_ARB		0x2005
+#define WGL_SWAP_LAYER_BUFFERS_ARB		0x2006
+#define WGL_SWAP_METHOD_ARB			0x2007
+#define WGL_NUMBER_OVERLAYS_ARB			0x2008
+#define WGL_NUMBER_UNDERLAYS_ARB		0x2009
+#define WGL_TRANSPARENT_ARB			0x200A
+#define WGL_TRANSPARENT_RED_VALUE_ARB		0x2037
+#define WGL_TRANSPARENT_GREEN_VALUE_ARB		0x2038
+#define WGL_TRANSPARENT_BLUE_VALUE_ARB		0x2039
+#define WGL_TRANSPARENT_ALPHA_VALUE_ARB		0x203A
+#define WGL_TRANSPARENT_INDEX_VALUE_ARB		0x203B
+#define WGL_SHARE_DEPTH_ARB			0x200C
+#define WGL_SHARE_STENCIL_ARB			0x200D
+#define WGL_SHARE_ACCUM_ARB			0x200E
+#define WGL_SUPPORT_GDI_ARB			0x200F
+#define WGL_SUPPORT_OPENGL_ARB			0x2010
+#define WGL_DOUBLE_BUFFER_ARB			0x2011
+#define WGL_STEREO_ARB				0x2012
+#define WGL_PIXEL_TYPE_ARB			0x2013
+#define WGL_COLOR_BITS_ARB			0x2014
+#define WGL_RED_BITS_ARB			0x2015
+#define WGL_RED_SHIFT_ARB			0x2016
+#define WGL_GREEN_BITS_ARB			0x2017
+#define WGL_GREEN_SHIFT_ARB			0x2018
+#define WGL_BLUE_BITS_ARB			0x2019
+#define WGL_BLUE_SHIFT_ARB			0x201A
+#define WGL_ALPHA_BITS_ARB			0x201B
+#define WGL_ALPHA_SHIFT_ARB			0x201C
+#define WGL_ACCUM_BITS_ARB			0x201D
+#define WGL_ACCUM_RED_BITS_ARB			0x201E
+#define WGL_ACCUM_GREEN_BITS_ARB		0x201F
+#define WGL_ACCUM_BLUE_BITS_ARB			0x2020
+#define WGL_ACCUM_ALPHA_BITS_ARB		0x2021
+#define WGL_DEPTH_BITS_ARB			0x2022
+#define WGL_STENCIL_BITS_ARB			0x2023
+#define WGL_AUX_BUFFERS_ARB			0x2024
+
+#define WGL_NO_ACCELERATION_ARB			0x2025
+#define WGL_GENERIC_ACCELERATION_ARB		0x2026
+#define WGL_FULL_ACCELERATION_ARB		0x2027
+
+#define WGL_SWAP_EXCHANGE_ARB			0x2028
+#define WGL_SWAP_COPY_ARB			0x2029
+#define WGL_SWAP_UNDEFINED_ARB			0x202A
+
+#define WGL_TYPE_RGBA_ARB			0x202B
+#define WGL_TYPE_COLORINDEX_ARB                 0x202C
+
+#endif

panda/src/wgldisplay/wglGraphicsBuffer.h

@@ -50,19 +50,13 @@ protected:
   virtual bool open_buffer();
 
 private:
-  void setup_colormap(const PIXELFORMATDESCRIPTOR &pixelformat);
+  bool make_window();
-
-#ifdef _DEBUG
-  static void print_pfd(PIXELFORMATDESCRIPTOR *pfd, char *msg);
-#endif
 
   static void register_window_class();
   static LONG WINAPI static_window_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);
-  static void show_error_message(DWORD message_id = 0);
 
-  HWND _hWnd;
+  HWND _window;
-  HDC _hdc;
+  HDC _window_dc;
-  HPALETTE _colormap;
 
   static const char * const _window_class_name;
   static bool _window_class_registered;

panda/src/wgldisplay/wglGraphicsPipe.cxx

@@ -27,6 +27,7 @@ static const char * const OGLDrvStrings[] = { "Software", "MCD", "ICD" };
 
 TypeHandle wglGraphicsPipe::_type_handle;
   
+
 ////////////////////////////////////////////////////////////////////
 //     Function: wglGraphicsPipe::Constructor
 //       Access: Public

panda/src/wgldisplay/wglGraphicsStateGuardian.I

@@ -32,6 +32,19 @@ get_pfnum() const {
   return _pfnum;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: wglGraphicsStateGuardian::made_context
+//       Access: Public
+//  Description: Returns true if the GSG has had a context made for it
+//               already, false otherwise.  If this returns false, the
+//               next call to get_context() will quietly make a new
+//               context.
+////////////////////////////////////////////////////////////////////
+INLINE bool wglGraphicsStateGuardian::
+made_context() const {
+  return _made_context;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: wglGraphicsStateGuardian::get_context
 //       Access: Public

panda/src/wgldisplay/wglGraphicsStateGuardian.cxx

@@ -17,7 +17,7 @@
 ////////////////////////////////////////////////////////////////////
 
 #include "wglGraphicsStateGuardian.h"
-
+#include "string_utils.h"
 
 TypeHandle wglGraphicsStateGuardian::_type_handle;
 
@@ -34,6 +34,9 @@ wglGraphicsStateGuardian(const FrameBufferProperties &properties,
 {
   _made_context = false;
   _context = (HGLRC)NULL;
+
+  _supports_pbuffer = false;
+  _supports_pixel_format = false;
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -49,6 +52,87 @@ wglGraphicsStateGuardian::
   }
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: wglGraphicsStateGuardian::reset
+//       Access: Public, Virtual
+//  Description: Resets all internal state as if the gsg were newly
+//               created.
+////////////////////////////////////////////////////////////////////
+void wglGraphicsStateGuardian::
+reset() {
+  GLGraphicsStateGuardian::reset();
+
+  // Output the vendor and version strings.
+  show_gl_string("GL_VENDOR", GL_VENDOR);
+  show_gl_string("GL_RENDERER", GL_RENDERER);
+  show_gl_string("GL_VERSION", GL_VERSION);
+
+  // Save the extensions tokens.
+  save_extensions((const char *)glGetString(GL_EXTENSIONS));
+
+  // Also save the tokens listed by wglGetExtensionsString.  This is a
+  // little trickier, since the query function is itself an extension.
+  typedef const GLubyte *(*wglGetExtensionsStringEXT_proc)(void);
+  wglGetExtensionsStringEXT_proc wglGetExtensionsStringEXT = 
+    (wglGetExtensionsStringEXT_proc)wglGetProcAddress("wglGetExtensionsStringEXT");
+  if (wglGetExtensionsStringEXT != NULL) {
+    save_extensions((const char *)wglGetExtensionsStringEXT());
+  }
+
+  if (wgldisplay_cat.is_debug()) {
+    wgldisplay_cat.debug()
+      << "GL Extensions:\n";
+    pset<string>::const_iterator ei;
+    for (ei = _extensions.begin(); ei != _extensions.end(); ++ei) {
+      wgldisplay_cat.debug() << (*ei) << "\n";
+    }
+  }
+
+  _supports_pbuffer = (_extensions.count("WGL_ARB_pbuffer") != 0);
+  _supports_pixel_format = (_extensions.count("WGL_ARB_pixel_format") != 0);
+
+  _wglCreatePbufferARB = 
+    (wglCreatePbufferARB_proc)wglGetProcAddress("wglCreatePbufferARB");
+  _wglGetPbufferDCARB = 
+    (wglGetPbufferDCARB_proc)wglGetProcAddress("wglGetPbufferDCARB");
+  _wglReleasePbufferDCARB = 
+    (wglReleasePbufferDCARB_proc)wglGetProcAddress("wglReleasePbufferDCARB");
+  _wglDestroyPbufferARB = 
+    (wglDestroyPbufferARB_proc)wglGetProcAddress("wglDestroyPbufferARB");
+  _wglQueryPbufferARB = 
+    (wglQueryPbufferARB_proc)wglGetProcAddress("wglQueryPbufferARB");
+
+  if (_supports_pbuffer) {
+    if (_wglCreatePbufferARB == NULL ||
+        _wglGetPbufferDCARB == NULL ||
+        _wglReleasePbufferDCARB == NULL ||
+        _wglDestroyPbufferARB == NULL ||
+        _wglQueryPbufferARB == NULL) {
+      wgldisplay_cat.error()
+        << "Driver claims to support WGL_ARB_pbuffer extension, but does not define all functions.\n";
+      _supports_pbuffer = false;
+    }
+  }
+
+  _wglGetPixelFormatAttribivARB =
+    (wglGetPixelFormatAttribivARB_proc)wglGetProcAddress("wglGetPixelFormatAttribivARB");
+  _wglGetPixelFormatAttribfvARB =
+    (wglGetPixelFormatAttribfvARB_proc)wglGetProcAddress("wglGetPixelFormatAttribfvARB");
+  _wglChoosePixelFormatARB =
+    (wglChoosePixelFormatARB_proc)wglGetProcAddress("wglChoosePixelFormatARB");
+
+  if (_supports_pixel_format) {
+    if (_wglGetPixelFormatAttribivARB == NULL ||
+        _wglGetPixelFormatAttribfvARB == NULL ||
+        _wglChoosePixelFormatARB == NULL) {
+      wgldisplay_cat.error()
+        << "Driver claims to support WGL_ARB_pixel_format extension, but does not define all functions.\n";
+      _supports_pixel_format = false;
+    }
+  }
+}
+
+
 ////////////////////////////////////////////////////////////////////
 //     Function: wglGraphicsStateGuardian::make_context
 //       Access: Private
@@ -72,3 +156,42 @@ make_context(HDC hdc) {
     return;
   }
 }
+
+////////////////////////////////////////////////////////////////////
+//     Function: wglGraphicsStateGuardian::show_gl_string
+//       Access: Private
+//  Description: Outputs the result of glGetString() on the indicated
+//               tag.
+////////////////////////////////////////////////////////////////////
+void wglGraphicsStateGuardian::
+show_gl_string(const string &name, GLenum id) {
+  if (wgldisplay_cat.is_debug()) {
+    const GLubyte *text = glGetString(id);
+    if (text == (const GLubyte *)NULL) {
+      wgldisplay_cat.debug()
+        << "Unable to query " << name << "\n";
+    } else {
+      wgldisplay_cat.debug()
+        << name << " = " << (const char *)text << "\n";
+    }
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: wglGraphicsStateGuardian::save_extensions
+//       Access: Private
+//  Description: Separates the string returned by GL_EXTENSIONS or
+//               wglGetExtensionsStringEXT into its individual tokens
+//               and saves them in the _extensions member.
+////////////////////////////////////////////////////////////////////
+void wglGraphicsStateGuardian::
+save_extensions(const char *extensions) {
+  vector_string tokens;
+  extract_words(extensions, tokens);
+
+  vector_string::iterator ti;
+  for (ti = tokens.begin(); ti != tokens.end(); ++ti) {
+    _extensions.insert(*ti);
+  }
+}
+

panda/src/wgldisplay/wglGraphicsStateGuardian.h

@@ -21,6 +21,7 @@
 
 #include "pandabase.h"
 
+#include "wglExtensions.h"
 #include "glGraphicsStateGuardian.h"
 
 ////////////////////////////////////////////////////////////////////
@@ -34,10 +35,15 @@ public:
   virtual ~wglGraphicsStateGuardian();
 
   INLINE int get_pfnum() const;
+  INLINE bool made_context() const;
   INLINE HGLRC get_context(HDC hdc);
 
+  virtual void reset();
+
 private:
   void make_context(HDC hdc);
+  void show_gl_string(const string &name, GLenum id);
+  void save_extensions(const char *extensions);
 
   // All windows that share a particular GL context must also share
   // the same pixel format; therefore, we store the pixel format
@@ -47,6 +53,23 @@ private:
   bool _made_context;
   HGLRC _context;
 
+  pset<string> _extensions;
+
+public:
+  bool _supports_pbuffer;
+
+  wglCreatePbufferARB_proc _wglCreatePbufferARB;
+  wglGetPbufferDCARB_proc _wglGetPbufferDCARB;
+  wglReleasePbufferDCARB_proc _wglReleasePbufferDCARB;
+  wglDestroyPbufferARB_proc _wglDestroyPbufferARB;
+  wglQueryPbufferARB_proc _wglQueryPbufferARB;
+
+  bool _supports_pixel_format;
+
+  wglGetPixelFormatAttribivARB_proc _wglGetPixelFormatAttribivARB;
+  wglGetPixelFormatAttribfvARB_proc _wglGetPixelFormatAttribfvARB;
+  wglChoosePixelFormatARB_proc _wglChoosePixelFormatARB;
+
 public:
   static TypeHandle get_class_type() {
     return _type_handle;