apple: Initial import of libGL for OSX from AppleSGLX svn repository.

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>

1 files changed, 128 insertions, 0 deletions

diff --git a/src/glx/apple/apple_cgl.c b/src/glx/apple/apple_cgl.c
new file mode 100644
index 0000000000..737d757ed5
--- /dev/null
+++ b/src/glx/apple/apple_cgl.c
@@ -0,0 +1,128 @@
+/*
+ Copyright (c) 2008 Apple Inc.
+ 
+ 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 THE ABOVE LISTED COPYRIGHT
+ HOLDER(S) 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.
+ 
+ Except as contained in this notice, the name(s) of the above
+ copyright holders shall not be used in advertising or otherwise to
+ promote the sale, use or other dealings in this Software without
+ prior written authorization.
+*/
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+
+#include "apple_cgl.h"
+#include "apple_glx.h"
+
+#ifndef OPENGL_FRAMEWORK_PATH
+#define OPENGL_FRAMEWORK_PATH "/System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL"
+#endif
+
+static void *dl_handle = NULL;
+
+struct apple_cgl_api apple_cgl;
+
+static bool initialized = false;
+
+static void *
+sym(void *h, const char *name)
+{
+   void *s;
+
+   s = dlsym(h, name);
+
+   if (NULL == s) {
+      fprintf(stderr, "error: %s\n", dlerror());
+      abort();
+   }
+
+   return s;
+}
+
+void
+apple_cgl_init(void)
+{
+   void *h;
+   GLint major = 0, minor = 0;
+   const char *opengl_framework_path;
+
+   if (initialized)
+      return;
+
+   opengl_framework_path = getenv("OPENGL_FRAMEWORK_PATH");
+   if (!opengl_framework_path) {
+      opengl_framework_path = OPENGL_FRAMEWORK_PATH;
+   }
+
+   (void) dlerror();            /*drain dlerror */
+   h = dlopen(opengl_framework_path, RTLD_NOW);
+
+   if (NULL == h) {
+      fprintf(stderr, "error: unable to dlopen %s : %s\n",
+              opengl_framework_path, dlerror());
+      abort();
+   }
+
+   dl_handle = h;
+
+   apple_cgl.get_version = sym(h, "CGLGetVersion");
+
+   apple_cgl.get_version(&major, &minor);
+
+   apple_glx_diagnostic("CGL major %d minor %d\n", major, minor);
+
+   if (1 != major) {
+      fprintf(stderr, "WARNING: the CGL major version has changed!\n"
+              "libGL may be incompatible!\n");
+   }
+
+   apple_cgl.choose_pixel_format = sym(h, "CGLChoosePixelFormat");
+   apple_cgl.destroy_pixel_format = sym(h, "CGLDestroyPixelFormat");
+
+   apple_cgl.clear_drawable = sym(h, "CGLClearDrawable");
+   apple_cgl.flush_drawable = sym(h, "CGLFlushDrawable");
+
+   apple_cgl.create_context = sym(h, "CGLCreateContext");
+   apple_cgl.destroy_context = sym(h, "CGLDestroyContext");
+
+   apple_cgl.set_current_context = sym(h, "CGLSetCurrentContext");
+   apple_cgl.get_current_context = sym(h, "CGLGetCurrentContext");
+   apple_cgl.error_string = sym(h, "CGLErrorString");
+
+   apple_cgl.set_off_screen = sym(h, "CGLSetOffScreen");
+
+   apple_cgl.copy_context = sym(h, "CGLCopyContext");
+
+   apple_cgl.create_pbuffer = sym(h, "CGLCreatePBuffer");
+   apple_cgl.destroy_pbuffer = sym(h, "CGLDestroyPBuffer");
+   apple_cgl.set_pbuffer = sym(h, "CGLSetPBuffer");
+
+   initialized = true;
+}
+
+void *
+apple_cgl_get_dl_handle(void)
+{
+   return dl_handle;
+}