From 0594cf70883b64692ba617d85f4f9b4e636e5c2b Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston <jeremyhu@apple.com>
Date: Thu, 1 Apr 2010 11:01:31 -0700
Subject: apple: Initial import of libGL for OSX from AppleSGLX svn repository.

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
---
 src/glx/apple/apple_visual.c | 144 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 src/glx/apple/apple_visual.c

(limited to 'src/glx/apple/apple_visual.c')

diff --git a/src/glx/apple/apple_visual.c b/src/glx/apple/apple_visual.c
new file mode 100644
index 0000000000..e80914741e
--- /dev/null
+++ b/src/glx/apple/apple_visual.c
@@ -0,0 +1,144 @@
+/*
+ Copyright (c) 2008, 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 <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <GL/gl.h>
+#include <OpenGL/OpenGL.h>
+#include <OpenGL/CGLContext.h>
+#include <OpenGL/CGLRenderers.h>
+#include "apple_cgl.h"
+#include "apple_visual.h"
+#include "apple_glx.h"
+#include "glcontextmodes.h"
+
+enum
+{
+   MAX_ATTR = 60
+};
+
+/*mode is a __GlcontextModes*/
+void
+apple_visual_create_pfobj(CGLPixelFormatObj * pfobj, const void *mode,
+                          bool * double_buffered, bool * uses_stereo,
+                          bool offscreen)
+{
+   CGLPixelFormatAttribute attr[MAX_ATTR];
+   const __GLcontextModes *c = mode;
+   int numattr = 0;
+   GLint vsref = 0;
+   CGLError error = 0;
+
+   if (offscreen) {
+      apple_glx_diagnostic
+         ("offscreen rendering enabled.  Using kCGLPFAOffScreen\n");
+
+      attr[numattr++] = kCGLPFAOffScreen;
+      attr[numattr++] = kCGLPFAColorSize;
+      attr[numattr++] = 32;
+   }
+   else if (getenv("LIBGL_ALWAYS_SOFTWARE") != NULL) {
+      apple_glx_diagnostic
+         ("Software rendering requested.  Using kCGLRendererGenericFloatID.\n");
+      attr[numattr++] = kCGLPFARendererID;
+      attr[numattr++] = kCGLRendererGenericFloatID;
+   }
+   else if (getenv("LIBGL_ALLOW_SOFTWARE") != NULL) {
+      apple_glx_diagnostic
+         ("Software rendering is not being excluded.  Not using kCGLPFAAccelerated.\n");
+   }
+   else {
+      attr[numattr++] = kCGLPFAAccelerated;
+   }
+
+   /* 
+    * The program chose a config based on the fbconfigs or visuals.
+    * Those are based on the attributes from CGL, so we probably
+    * do want the closest match for the color, depth, and accum.
+    */
+   attr[numattr++] = kCGLPFAClosestPolicy;
+
+   if (c->stereoMode) {
+      attr[numattr++] = kCGLPFAStereo;
+      *uses_stereo = true;
+   }
+   else {
+      *uses_stereo = false;
+   }
+
+   if (c->doubleBufferMode) {
+      attr[numattr++] = kCGLPFADoubleBuffer;
+      *double_buffered = true;
+   }
+   else {
+      *double_buffered = false;
+   }
+
+   attr[numattr++] = kCGLPFAColorSize;
+   attr[numattr++] = c->redBits + c->greenBits + c->blueBits;
+   attr[numattr++] = kCGLPFAAlphaSize;
+   attr[numattr++] = c->alphaBits;
+
+   if ((c->accumRedBits + c->accumGreenBits + c->accumBlueBits) > 0) {
+      attr[numattr++] = kCGLPFAAccumSize;
+      attr[numattr++] = c->accumRedBits + c->accumGreenBits +
+         c->accumBlueBits + c->accumAlphaBits;
+   }
+
+   if (c->depthBits > 0) {
+      attr[numattr++] = kCGLPFADepthSize;
+      attr[numattr++] = c->depthBits;
+   }
+
+   if (c->stencilBits > 0) {
+      attr[numattr++] = kCGLPFAStencilSize;
+      attr[numattr++] = c->stencilBits;
+   }
+
+   if (c->sampleBuffers > 0) {
+      attr[numattr++] = kCGLPFAMultisample;
+      attr[numattr++] = kCGLPFASampleBuffers;
+      attr[numattr++] = c->sampleBuffers;
+      attr[numattr++] = kCGLPFASamples;
+      attr[numattr++] = c->samples;
+   }
+
+   attr[numattr++] = 0;
+
+   assert(numattr < MAX_ATTR);
+
+   error = apple_cgl.choose_pixel_format(attr, pfobj, &vsref);
+
+   if (error) {
+      fprintf(stderr, "error: %s\n", apple_cgl.error_string(error));
+      abort();
+   }
+}
-- 
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