+/*
+ *
+ * Copyright (c) 2001 César Blecua Udías All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * CESAR BLECUA UDIAS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
#ifndef __SG_EXTENSIONS_HXX
#define __SG_EXTENSIONS_HXX 1
-#ifndef WIN32
-#include <dlfcn.h>
+#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__)
+# include <windows.h>
+#else
+# include <dlfcn.h>
#endif
-inline void (*SGLookupFunction(const char *func))() {
+#include <GL/gl.h>
-#if defined( WIN32 )
- return (void (*)()) wglGetProcAddress(func);
-#else
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#ifndef APIENTRY
+#define APIENTRY
+#endif
+
+static bool SGSearchExtensionsString(char *extString, char *extName);
+bool SGIsOpenGLExtensionSupported(char *extName);
+
+#ifdef __APPLE__
+ // don't use an inline function for symbol lookup, since it is too big
+ void* macosxGetGLProcAddress(const char *func);
+#endif
+
+inline void (*SGLookupFunction(const char *func))()
+{
+#if defined( WIN32 ) && !defined(__CYGWIN__) && !defined(__MINGW32__)
+ return (void (*)()) wglGetProcAddress(func);
+
+#elif defined( __APPLE__ )
+ return (void (*)()) macosxGetGLProcAddress(func);
+
+#else // UNIX
- // If the target system s UNIX and the ARB_get_proc_address
- // GLX extension is *not* guaranteed to be supported. An alternative
- // dlsym-based approach will be used instead.
- #if defined( linux ) || defined ( sgi )
- void *libHandle;
- void (*fptr)();
- libHandle = dlopen("libGL.so", RTLD_LAZY);
- fptr = (void (*)()) dlsym(libHandle, func);
- dlclose(libHandle);
- return fptr;
- #else
- return glXGetProcAddressARB(func);
- #endif
+ // If the target system s UNIX and the ARB_get_proc_address
+ // GLX extension is *not* guaranteed to be supported. An alternative
+ // dlsym-based approach will be used instead.
+
+ void *libHandle;
+ void (*fptr)();
+ libHandle = dlopen("libGL.so", RTLD_LAZY);
+ fptr = (void (*)()) dlsym(libHandle, func);
+ dlclose(libHandle);
+ return fptr;
#endif
}
+
+
+/* OpenGL extension declarations */
+#ifndef GL_EXT_point_parameters
+#define GL_POINT_SIZE_MIN_EXT 0x8126
+#define GL_DISTANCE_ATTENUATION_EXT 0x8129
#endif
+
+#ifndef GL_ARB_point_parameters
+#define GL_POINT_SIZE_MIN_ARB 0x8126
+#define GL_DISTANCE_ATTENUATION_ARB 0x8129
+#endif
+
+typedef void (APIENTRY * glPointParameterfProc)(GLenum pname, GLfloat param);
+typedef void (APIENTRY * glPointParameterfvProc)(GLenum pname, const GLfloat *params);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif // !__SG_EXTENSIONS_HXX
+
projects / simgear.git / blobdiff