/*
* Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#ifndef OGLFuncs_md_h_Included
#define OGLFuncs_md_h_Included
#include <stdlib.h>
#ifndef MACOSX
#include <dlfcn.h>
#endif
#include "jvm_md.h"
#include "J2D_GL/glx.h"
#include "OGLFuncMacros.h"
/**
* GLX 1.2 functions
*/
typedef void (GLAPIENTRY *glXDestroyContextType)(Display *dpy, GLXContext ctx);
typedef GLXContext (GLAPIENTRY *glXGetCurrentContextType)(void);
typedef GLXDrawable (GLAPIENTRY *glXGetCurrentDrawableType)(void);
typedef Bool (GLAPIENTRY *glXIsDirectType)(Display *dpy, GLXContext ctx);
typedef Bool (GLAPIENTRY *glXQueryExtensionType)(Display *dpy, int *errorBase, int *eventBase);
typedef Bool (GLAPIENTRY *glXQueryVersionType)(Display *dpy, int *major, int *minor);
typedef void (GLAPIENTRY *glXSwapBuffersType)(Display *dpy, GLXDrawable drawable);
typedef const char * (GLAPIENTRY *glXGetClientStringType)(Display *dpy, int name);
typedef const char * (GLAPIENTRY *glXQueryServerStringType)(Display *dpy, int screen, int name);
typedef const char * (GLAPIENTRY *glXQueryExtensionsStringType)(Display *dpy, int screen);
typedef void (GLAPIENTRY *glXWaitGLType)(void);
/**
* GLX 1.3 functions
*/
typedef GLXFBConfig * (GLAPIENTRY *glXGetFBConfigsType)(Display *dpy, int screen, int *nelements);
typedef GLXFBConfig * (GLAPIENTRY *glXChooseFBConfigType)(Display *dpy, int screen, const int *attrib_list, int *nelements);
typedef int (GLAPIENTRY *glXGetFBConfigAttribType)(Display *dpy, GLXFBConfig config, int attribute, int *value);
typedef XVisualInfo * (GLAPIENTRY *glXGetVisualFromFBConfigType)(Display *dpy, GLXFBConfig config);
typedef GLXWindow (GLAPIENTRY *glXCreateWindowType)(Display *dpy, GLXFBConfig config, Window win, const int *attrib_list);
typedef void (GLAPIENTRY *glXDestroyWindowType)(Display *dpy, GLXWindow win);
typedef GLXPbuffer (GLAPIENTRY *glXCreatePbufferType)(Display *dpy, GLXFBConfig config, const int *attrib_list);
typedef void (GLAPIENTRY *glXDestroyPbufferType)(Display *dpy, GLXPbuffer pbuffer);
typedef void (GLAPIENTRY *glXQueryDrawableType)(Display *dpy, GLXDrawable draw, int attribute, unsigned int *value);
typedef GLXContext (GLAPIENTRY *glXCreateNewContextType)(Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct);
typedef Bool (GLAPIENTRY *glXMakeContextCurrentType)(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
typedef GLXDrawable (GLAPIENTRY *glXGetCurrentReadDrawableType)(void);
typedef int (GLAPIENTRY *glXQueryContextType)(Display *dpy, GLXContext ctx, int attribute, int *value);
typedef void (GLAPIENTRY *glXSelectEventType)(Display *dpy, GLXDrawable draw, unsigned long event_mask);
typedef void (GLAPIENTRY *glXGetSelectedEventType)(Display *dpy, GLXDrawable draw, unsigned long *event_mask);
/**
* GLX extension functions
*/
typedef void * (GLAPIENTRY *glXGetProcAddressType)(const char *);
/*
* Note: Historically we have used dlopen/dlsym() to load function pointers
* from libgl.so, and things have worked fine. However, we have run into at
* least one case (on ATI's Linux drivers) where dlsym() will return NULL
* when trying to load functions from the GL_ARB_fragment_shader extension.
* Plausibly this is a bug in their drivers (other extension functions load
* just fine on those same drivers), but for a number of years there has been
* a glXGetProcAddressARB() extension available that is intended to be the
* primary means for an application to load extension functions in a reliable
* manner. So while dlsym() will return NULL for those shader-related
* functions, glXGetProcAddressARB() works just fine.
*
* I haven't used the glXGetProcAddress() approach in the past because it
* seemed unnecessary (i.e. dlsym() was working fine), but upon further
* reading I think we should use glXGetProcAddress() in favor of dlsym(),
* not only to work around this "bug", but also to be safer going forward.
*
* Just to complicate matters, glXGetProcAddress() was proposed to be added
* into the GLX 1.4 spec, which is still (as yet) unfinalized. Sun's OGL 1.3
* implementation reports its GLX version as 1.4, and therefore includes
* the glXGetProcAddress() entrypoint, but does not include
* GLX_ARB_get_proc_address in its extension string nor does it export the
* glXGetProcAddressARB() entrypoint. On the other hand, ATI's Linux drivers
* (as well as Nvidia's Linux and Solaris drivers) currently report their
* GLX version as 1.3, but they do export the glXGetProcAddressARB()
* entrypoint and its associated extension string. So to make this work
* everywhere, we first try to load the glXGetProcAddress() entrypoint,
* failing that we try the glXGetProcAddressARB() entrypoint, and if that
* fails too, then we close libGL.so and do not bother trying to initialize
* the rest of the OGL pipeline.
*/
#define OGL_LIB_HANDLE pLibGL
#define OGL_DECLARE_LIB_HANDLE() \
static glXGetProcAddressType j2d_glXGetProcAddress; \
static void *OGL_LIB_HANDLE = NULL
#define OGL_LIB_IS_UNINITIALIZED() \
(OGL_LIB_HANDLE == NULL)
#define OGL_OPEN_LIB() \
do { \
{ \
char *libGLPath = getenv("J2D_ALT_LIBGL_PATH"); \
if (libGLPath == NULL) { \
libGLPath = VERSIONED_JNI_LIB_NAME("GL", "1"); \
} \
OGL_LIB_HANDLE = dlopen(libGLPath, RTLD_LAZY | RTLD_LOCAL); \
} \
if (OGL_LIB_HANDLE) { \
j2d_glXGetProcAddress = (glXGetProcAddressType) \
dlsym(OGL_LIB_HANDLE, "glXGetProcAddress"); \
if (j2d_glXGetProcAddress == NULL) { \
j2d_glXGetProcAddress = (glXGetProcAddressType) \
dlsym(OGL_LIB_HANDLE, "glXGetProcAddressARB"); \
if (j2d_glXGetProcAddress == NULL) { \
dlclose(OGL_LIB_HANDLE); \
OGL_LIB_HANDLE = NULL; \
} \
} \
} \
} while (0)
#define OGL_CLOSE_LIB() \
dlclose(OGL_LIB_HANDLE)
#define OGL_GET_PROC_ADDRESS(f) \
j2d_glXGetProcAddress(#f)
#define OGL_GET_EXT_PROC_ADDRESS(f) \
OGL_GET_PROC_ADDRESS(f)
#define OGL_EXPRESS_PLATFORM_FUNCS(action) \
OGL_##action##_FUNC(glXDestroyContext); \
OGL_##action##_FUNC(glXGetCurrentContext); \
OGL_##action##_FUNC(glXGetCurrentDrawable); \
OGL_##action##_FUNC(glXIsDirect); \
OGL_##action##_FUNC(glXQueryExtension); \
OGL_##action##_FUNC(glXQueryVersion); \
OGL_##action##_FUNC(glXSwapBuffers); \
OGL_##action##_FUNC(glXGetClientString); \
OGL_##action##_FUNC(glXQueryServerString); \
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