Beginning of infrastructure to support WGL extensions.

dlls/opengl32/Makefile.in

@@ -8,9 +8,10 @@ EXTRAINCL = @X_CFLAGS@
 EXTRALIBS = @X_LIBS@ @X_PRE_LIBS@ @XLIB@ @X_EXTRA_LIBS@ @OPENGL_LIBS@
 
 C_SRCS = \
-	wgl.c \
+	opengl_ext.c \
 	opengl_norm.c \
-	opengl_ext.c
+	wgl.c \
+	wgl_ext.c
 
 @MAKE_DLL_RULES@
 

dlls/opengl32/make_opengl

@@ -544,8 +544,6 @@ print SPEC "@  stdcall wglCreateContext(long)
 @  stdcall wglDescribeLayerPlane(long long long long ptr)
 @  stdcall wglGetCurrentContext()
 @  stdcall wglGetCurrentDC()
-@  stdcall wglGetExtensionsStringEXT()
-@  stdcall wglGetExtensionsStringARB(long)
 @  stdcall wglGetLayerPaletteEntries(long long long long ptr)
 @  stdcall wglGetProcAddress(str)
 @  stdcall wglMakeCurrent(long long)

dlls/opengl32/opengl32.spec

@@ -5,8 +5,6 @@
 @  stdcall wglDescribeLayerPlane(long long long long ptr)
 @  stdcall wglGetCurrentContext()
 @  stdcall wglGetCurrentDC()
-@  stdcall wglGetExtensionsStringEXT()
-@  stdcall wglGetExtensionsStringARB(long)
 @  stdcall wglGetLayerPaletteEntries(long long long long ptr)
 @  stdcall wglGetProcAddress(str)
 @  stdcall wglMakeCurrent(long long)

dlls/opengl32/wgl.c

@@ -30,6 +30,7 @@
 #include "winerror.h"
 
 #include "wgl.h"
+#include "wgl_ext.h"
 #include "opengl_ext.h"
 #include "wine/library.h"
 #include "wine/debug.h"
@@ -302,6 +303,11 @@ static int compar(const void *elt_a, const void *elt_b) {
 		((OpenGL_extension *) elt_b)->name);
 }
 
+static int wgl_compar(const void *elt_a, const void *elt_b) {
+  return strcmp(((WGL_extension *) elt_a)->func_name,
+		((WGL_extension *) elt_b)->func_name);
+}
+
 void* WINAPI wglGetProcAddress(LPCSTR  lpszProc) {
   void *local_func;
   static HMODULE hm = 0;
@@ -331,6 +337,14 @@ void* WINAPI wglGetProcAddress(LPCSTR  lpszProc) {
 					 extension_registry_size, sizeof(OpenGL_extension), compar);
 
   if (ext_ret == NULL) {
+    WGL_extension wgl_ext, *wgl_ext_ret;
+
+    /* Try to find the function in the WGL extensions ... */
+    wgl_ext.func_name = (char *) lpszProc;
+    wgl_ext_ret = (WGL_extension *) bsearch(&wgl_ext, wgl_extension_registry,
+					    wgl_extension_registry_size, sizeof(WGL_extension), wgl_compar);
+
+    if (wgl_ext_ret == NULL) {
       /* Some sanity checks :-) */
       ENTER_GL();
       local_func = p_glXGetProcAddressARB(lpszProc);
@@ -343,6 +357,26 @@ void* WINAPI wglGetProcAddress(LPCSTR  lpszProc) {
       WARN("Did not find extension %s in either Wine or your OpenGL library.\n", lpszProc);
       return NULL;
     } else {
+	void *ret = NULL;
+
+	if (wgl_ext_ret->func_init != NULL) {
+	    const char *err_msg;
+	    if ((err_msg = wgl_ext_ret->func_init(p_glXGetProcAddressARB,
+						  wgl_ext_ret->context)) == NULL) {
+		ret = wgl_ext_ret->func_address;
+	    } else {
+		WARN("Error when getting WGL extension '%s' : %s.\n", debugstr_a(lpszProc), err_msg);
+		return NULL;
+	    }
+	} else {
+	  ret = wgl_ext_ret->func_address;
+	}
+
+	if (ret)
+	    TRACE(" returning WGL function  (%p)\n", ret);
+	return ret;
+    }
+  } else {
     ENTER_GL();
     local_func = p_glXGetProcAddressARB(ext_ret->glx_name);
     LEAVE_GL();
@@ -713,41 +747,26 @@ static BOOL process_attach(void)
 	   TRACE("could not find glXGetProcAddressARB in libGL.\n");
   }
 
+  /* Initialize also the list of supported WGL extensions. */
+  wgl_ext_initialize_extensions(default_display, DefaultScreen(default_display));
+  
   if (default_cx == NULL) {
     ERR("Could not create default context.\n");
   }
   return TRUE;
 }
 
-/**********************************************************************/
-
-/* Some WGL extensions... */
-static const char *WGL_extensions = "WGL_ARB_extensions_string WGL_EXT_extensions_string";
-
-/**********************************************************************/
-
-const char * WINAPI wglGetExtensionsStringEXT(void) {
-    TRACE("() returning \"%s\"\n", WGL_extensions);
-
-    return WGL_extensions;
-}
 
 /**********************************************************************/
 
 static void process_detach(void)
 {
   glXDestroyContext(default_display, default_cx);
-}
 
-/***********************************************************************
- *              wglGetExtensionsStringARB(OPENGL32.@)
- */
-const char * WINAPI wglGetExtensionsStringARB(HDC hdc) {
-
-  return wglGetExtensionsStringEXT();
+  /* Do not leak memory... */
+  wgl_ext_finalize_extensions();
 }
 
-
 /***********************************************************************
  *           OpenGL initialisation routine
  */

dlls/opengl32/wgl_ext.c

+/* Support for window-specific OpenGL extensions.
+ *
+ * Copyright (c) 2004 Lionel Ulmer
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "config.h"
+#include "wine/port.h"
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "winuser.h"
+#include "winerror.h"
+
+#include "wgl.h"
+#include "wgl_ext.h"
+#include "opengl_ext.h"
+#include "wine/library.h"
+#include "wine/debug.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(opengl);
+
+/* Some WGL extensions... */
+static const char *WGL_extensions_base = "WGL_ARB_extensions_string WGL_EXT_extensions_string";
+static char *WGL_extensions = NULL;
+
+/* Extensions-query functions */
+BOOL query_function_pbuffers(const char *gl_version, const char *gl_extensions, const char *glx_extensions,
+			     const char *server_glx_extensions, const char *client_glx_extensions)
+{
+    return FALSE;
+}
+
+/***********************************************************************
+ *              wglGetExtensionsStringEXT(OPENGL32.@)
+ */
+const char * WINAPI wglGetExtensionsStringEXT(void) {
+    TRACE("() returning \"%s\"\n", WGL_extensions);
+
+    return WGL_extensions;
+}
+
+/***********************************************************************
+ *              wglGetExtensionsStringARB(OPENGL32.@)
+ */
+const char * WINAPI wglGetExtensionsStringARB(HDC hdc) {
+    TRACE("() returning \"%s\"\n", WGL_extensions);
+
+    return WGL_extensions;    
+}
+
+static const struct {
+    const char *name;
+    BOOL (*query_function)(const char *gl_version, const char *gl_extensions, const char *glx_extensions,
+			   const char *server_glx_extensions, const char *client_glx_extensions);
+} extension_list[] = {
+    { "WGL_ARB_pbuffer", query_function_pbuffers }
+};
+
+/* Used to initialize the WGL extension string at DLL loading */
+void wgl_ext_initialize_extensions(Display *display, int screen)
+{
+    int size = strlen(WGL_extensions_base);
+    const char *glx_extensions = glXQueryExtensionsString(display, screen);
+    const char *server_glx_extensions = glXQueryServerString(display, screen, GLX_EXTENSIONS);
+    const char *client_glx_extensions = glXGetClientString(display, GLX_EXTENSIONS);
+    const char *gl_extensions = (const char *) glGetString(GL_EXTENSIONS);
+    const char *gl_version = (const char *) glGetString(GL_VERSION);
+    int i;
+
+    TRACE("GL version      : %s.\n", debugstr_a(gl_version));
+    TRACE("GL exts         : %s.\n", debugstr_a(gl_extensions));
+    TRACE("GLX exts        : %s.\n", debugstr_a(glx_extensions));
+    TRACE("Server GLX exts : %s.\n", debugstr_a(server_glx_extensions));
+    TRACE("Client GLX exts : %s.\n", debugstr_a(client_glx_extensions));
+
+    for (i = 0; i < (sizeof(extension_list) / sizeof(extension_list[0])); i++) {
+	if (extension_list[i].query_function(gl_version, gl_extensions, glx_extensions,
+					     server_glx_extensions, client_glx_extensions)) {
+	    size += strlen(extension_list[i].name) + 1;
+	}
+    }
+
+    /* For the moment, only 'base' extensions are supported. */
+    WGL_extensions = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size + 1);
+    if (WGL_extensions == NULL) {
+	WGL_extensions = (char *) WGL_extensions_base;
+    } else {
+	strcpy(WGL_extensions, WGL_extensions_base);
+	for (i = 0; i < (sizeof(extension_list) / sizeof(extension_list[0])); i++) {
+	    if (extension_list[i].query_function(gl_version, gl_extensions, glx_extensions,
+						 server_glx_extensions, client_glx_extensions)) {
+		strcat(WGL_extensions, " ");
+		strcat(WGL_extensions, extension_list[i].name);
+	    }
+	}
+    }
+
+    TRACE("Supporting following WGL extensions : %s.\n", debugstr_a(WGL_extensions));
+}
+
+void wgl_ext_finalize_extensions(void)
+{
+    if (WGL_extensions != WGL_extensions_base) {
+	HeapFree(GetProcessHeap(), 0, WGL_extensions);
+    }
+}
+
+/* Putting this at the end to prevent having to write the prototypes :-) */
+WGL_extension wgl_extension_registry[] = {
+    { "wglGetExtensionsStringARB", (void *) wglGetExtensionsStringARB, NULL, NULL},
+    { "wglGetExtensionsStringEXT", (void *) wglGetExtensionsStringEXT, NULL, NULL}
+};
+int wgl_extension_registry_size = sizeof(wgl_extension_registry) / sizeof(wgl_extension_registry[0]);

dlls/opengl32/wgl_ext.h

+/* Support for window-specific OpenGL extensions.
+ *
+ * Copyright (c) 2004 Lionel Ulmer
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __DLLS_OPENGL32_WGL_EXT_H
+#define __DLLS_OPENGL32_WGL_EXT_H
+
+#include "opengl_ext.h"
+
+/* Used to initialize the WGL extension string at DLL loading */
+void wgl_ext_initialize_extensions(Display *display, int screen);
+void wgl_ext_finalize_extensions(void);
+
+typedef struct {
+    const char *func_name;
+    void *func_address;
+    const char *(*func_init)(void *(*p_glXGetProcAddressARB)(const GLubyte *), void *context);
+    void *context;
+} WGL_extension;
+
+extern WGL_extension wgl_extension_registry[];
+extern int wgl_extension_registry_size;
+
+#endif /* __DLLS_OPENGL32_WGL_EXT_H */