Package: gauche-gl Version: 0.4.1-3 Severity: normal
I had to do some changes to get it to work on my machine. The problems are caused by the nvidia libGL.so I am using: ii nvidia-glx 1.0.7174-3 NVIDIA binary XFree86 4.x driver It does not have glXGetProcAddress (only glXGetProcAddressARB) [EMAIL PROTECTED]:/tmp > objdump -T /usr/lib/libGL.so|grep -i getproc 00029894 g DF .text 000000b6 Base glXGetProcAddressARB After a bit of googling and reading this: http://lists.freedesktop.org/archives/xorg/2005-November/011291.html I am not quite sure wether one can expect glXGetProcAddress to be available. => I changed the code to use glXGetProcAddressARB. This required another change: It seems one has to define GL_GLEXT_PROTOTYPES before including gl.h or glx.h for extensions in order to get prototypes. (At least this is stated here: http://www.ks.uiuc.edu/Research/vmd/doxygen/OpenGLExtensions_8h-source.html) Patch: --- gauche-gl-0.4.1.orig/src/gauche-gl.h +++ gauche-gl-0.4.1/src/gauche-gl.h @@ -28,6 +28,9 @@ #endif #ifdef HAVE_GL_GLX_H +// it seems we have to define those to get the extension prototypes on linux +#define GL_GLEXT_PROTOTYPES 1 +#define GLX_GLXEXT_PROTOTYPES 1 #include <GL/glx.h> #endif --- gauche-gl-0.4.1.orig/src/gauche-gl.c +++ gauche-gl-0.4.1/src/gauche-gl.c @@ -135,14 +135,14 @@ supports GLX for the time being. */ void *Scm_GLGetProcAddress(const char *name) { -#if defined(GLX_VERSION_1_4) - if (glXGetProcAddress != NULL) { - return glXGetProcAddress(name); - } -#elif defined(GLX_ARB_get_proc_address) +#if defined(GLX_ARB_get_proc_address) if (glXGetProcAddressARB != NULL) { return glXGetProcAddressARB((const GLubyte*)name); } +#elif defined(GLX_VERSION_1_4) + if (glXGetProcAddress != NULL) { + return glXGetProcAddress(name); + } #elif defined(MacOSX) return glutGetProcAddress(name); #endif /* !defined(GLX_VERSION_1_4) && !defined(GLX_ARB_get_proc_address) */ Greetings Jens PS: Note: I did not carefully read the specs. I only wanted to get it to work (=> perhaps this patch is not the right thing to do) PPS: Off-topic: Some notes regarding example examples/cg/checkered-sphere-cg.scm: to get best result one should force the garbage collector to use the incremental collector and perhaps force your graphics driver to sync to vertical retrace/screen refresh. I use the following: export GC_ENABLE_INCREMENTAL=1 export GC_PAUSE_TIME_TARGET=5 // for nvidia: export __GL_SYNC_TO_VBLANK=1 -- System Information: Debian Release: 3.1 Architecture: i386 (i586) Kernel: Linux 2.6.8-3-386 Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Versions of packages gauche-gl depends on: ii freeglut3 2.2.0-8 OpenGL Utility Toolkit ii gauche 0.8.7-4 A Scheme implementation designed f ii libc6 2.3.2.ds1-22sarge4 GNU C Library: Shared libraries an ii libice6 4.3.0.dfsg.1-14sarge1 Inter-Client Exchange library ii libsm6 4.3.0.dfsg.1-14sarge1 X Window System Session Management ii libx11-6 4.3.0.dfsg.1-14sarge1 X Window System protocol client li ii libxext6 4.3.0.dfsg.1-14sarge1 X Window System miscellaneous exte ii libxi6 4.3.0.dfsg.1-14sarge1 X Window System Input extension li ii libxmu6 4.3.0.dfsg.1-14sarge1 X Window System miscellaneous util ii xlibmesa-gl [libgl 4.3.0.dfsg.1-14sarge1 Mesa 3D graphics library [XFree86] ii xlibmesa-glu [libg 4.3.0.dfsg.1-14sarge1 Mesa OpenGL utility library [XFree ii xlibs 4.3.0.dfsg.1-14sarge1 X Keyboard Extension (XKB) configu -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
