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

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

1 files changed, 119 insertions, 0 deletions

diff --git a/src/glx/apple/apple_xgl_api_stereo.c b/src/glx/apple/apple_xgl_api_stereo.c
new file mode 100644
index 0000000000..b50e3119cd
--- /dev/null
+++ b/src/glx/apple/apple_xgl_api_stereo.c
@@ -0,0 +1,119 @@
+/*
+ Copyright (c) 2009 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 "apple_xgl_api_stereo.h"
+#include "apple_xgl_api.h"
+#include "apple_glx_context.h"
+
+extern struct apple_xgl_api __gl_api;
+/* 
+ * These are special functions for stereoscopic support 
+ * differences in MacOS X.
+ */
+void
+glDrawBuffer(GLenum mode)
+{
+   GLXContext gc = glXGetCurrentContext();
+
+   if (gc && apple_glx_context_uses_stereo(gc->apple)) {
+      GLenum buf[2];
+      GLsizei n = 0;
+
+      switch (mode) {
+      case GL_BACK:
+         buf[0] = GL_BACK_LEFT;
+         buf[1] = GL_BACK_RIGHT;
+         n = 2;
+         break;
+      case GL_FRONT:
+         buf[0] = GL_FRONT_LEFT;
+         buf[1] = GL_FRONT_RIGHT;
+         n = 2;
+         break;
+
+      default:
+         buf[0] = mode;
+         n = 1;
+         break;
+      }
+
+      __gl_api.DrawBuffers(n, buf);
+   }
+   else {
+      __gl_api.DrawBuffer(mode);
+   }
+}
+
+
+void
+glDrawBuffers(GLsizei n, const GLenum * bufs)
+{
+   GLXContext gc = glXGetCurrentContext();
+
+   if (gc && apple_glx_context_uses_stereo(gc->apple)) {
+      GLenum newbuf[n + 2];
+      GLsizei i, outi = 0;
+      bool have_back = false;
+      bool have_front = false;
+
+      for (i = 0; i < n; ++i) {
+         if (GL_BACK == bufs[i]) {
+            have_back = true;
+         }
+         else if (GL_FRONT == bufs[i]) {
+            have_back = true;
+         }
+         else {
+            newbuf[outi++] = bufs[i];
+         }
+      }
+
+      if (have_back) {
+         newbuf[outi++] = GL_BACK_LEFT;
+         newbuf[outi++] = GL_BACK_RIGHT;
+      }
+
+      if (have_front) {
+         newbuf[outi++] = GL_FRONT_LEFT;
+         newbuf[outi++] = GL_FRONT_RIGHT;
+      }
+
+      __gl_api.DrawBuffers(outi, newbuf);
+   }
+   else {
+      __gl_api.DrawBuffers(n, bufs);
+   }
+}
+
+void
+glDrawBuffersARB(GLsizei n, const GLenum * bufs)
+{
+   glDrawBuffers(n, bufs);
+}